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Ferreira A, Grohmann CH, Ribeiro MCH, Santos MST, de Oliveira RC, Siegle E. Beach surface model construction: A strategy approach with structure from motion - multi-view stereo. MethodsX 2024; 12:102694. [PMID: 38633418 PMCID: PMC11022107 DOI: 10.1016/j.mex.2024.102694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/02/2024] [Indexed: 04/19/2024] Open
Abstract
In contrast to traditional beach profiling methods like topographic surveys and GNSS, which pose significant challenges in terms of cost and time, this research underscores the efficiency, cost-effectiveness, and simplicity of terrestrial photogrammetry employing the Structure from Motion-Multi View Stereo (SfM-MVS) method. Notably, this approach enables the utilization of commonplace devices such as smartphones for data capture. The methodology integrates a 12-megapixel camera for image acquisition, processed through Agisoft Metashape Professional software, and validated for accuracy using ground control points (GCPs) and checkpoints (CKPs) calibrated via GNSS. Findings reveal substantial disparities in positional accuracy according to the Ground Control Points distribution. The study underscores the critical role of strategically distributing GCPs and CKPs in effectively mapping coastal areas, thus affirming the potential of SfM-MVS as a powerful and accessible tool for coastal monitoring initiatives. This research contributes significantly to advancing the efficiency and accessibility of beach profile monitoring, offering invaluable insights for researchers and practitioners in coastal management and environmental conservation efforts.•A simplified beach profile modeling methodology is proposed.•The method is faster and more cost-effective than traditional surveys (RTK GNSS, lidar, RPA).•The study highlights the importance of GCP and CKP distribution in enhancing SfM-MVS accuracy for coastal mapping.
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Affiliation(s)
- A.T.S. Ferreira
- Technology in Environment and Water Resources, São Paulo State Technological College of Jahu, Jaú 17212-599, SP, Brazil
- Oceanographic Institute, University of São Paulo, São Paulo 05508-120, Brazil
- Institute of Geosciences of the State University of Campinas, Campinas 13083-855, SP, Brazil
| | - Carlos Henrique Grohmann
- Institute of Energy and Environment, University of São Paulo (IEE-USP), Avenida Professor Luciano Gualberto, 1289, Cidade Universitária, 05508-010, São Paulo, Brazil
| | - Maria Carolina Hernandez Ribeiro
- School of Arts, Sciences and Humanities, University of São Paulo (EACH-USP), Avenida Arlindo Béttio, 1000, Ermelino Matarazzo, 03828-000, São Paulo, Brazil
| | - Marcelo Soares Teles Santos
- Techno-Science and Innovation Training Center, Federal University of Southern Bahia-UFSB, Itabuna Access Highway, km 39-Ferradas, Itabuna, 45613-204, Bahia, Brazil
| | | | - Eduardo Siegle
- Oceanographic Institute, University of São Paulo, São Paulo 05508-120, Brazil
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Mohren J, Schulze M. Automated cleaning of tie point clouds following USGS guidelines in Agisoft Metashape professional (ver. 2.1.0). MethodsX 2024; 12:102679. [PMID: 38577406 PMCID: PMC10992719 DOI: 10.1016/j.mex.2024.102679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 03/25/2024] [Indexed: 04/06/2024] Open
Abstract
The U.S. Geological Survey (USGS) has published a guideline to improve the quality of digital photogrammetric reconstructions created with the widely used Agisoft Metashape Professional software. The suggested workflows aim at filtering out low-quality tie points from the tie point cloud to optimize the camera model. However, the optimization procedure relies on an iteratively performed trial-and-error approach. If manually performed, the time expenditure required from the operator can be significant and the optimization process can be affected by the degree of diligence that is applied. To minimize the time expenditure and attentiveness required from the operator and to provide a framework for an improved reproducibility of camera model optimization workflows, we present here a python script serving as an extension for Agisoft Metashape Professional (tested on version 2.1.0) that automatizes the iterative point filtering procedure proposed by the USGS. As a result, the entire processing cycle can be performed largely unattended. •A graphical user interface allows to individually adjust important camera model optimization parameters.•Main tie point cloud quality measures can be directly assessed.•The reproducibility of the automated camera model optimization as tested in this study generally is above 99%.
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Affiliation(s)
- Joel Mohren
- Department of Geography, RWTH Aachen University, Wüllnerstraße 5b, Aachen 52062, Germany
- Institute of Geology and Mineralogy, University of Cologne, Zülpicher Str. 49b, Cologne 50674, Germany
| | - Maximilian Schulze
- Institute of Geology and Mineralogy, University of Cologne, Zülpicher Str. 49b, Cologne 50674, Germany
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Corvino S, Piazza A, Spiriev T, Tafuto R, Corrivetti F, Solari D, Cavallo LM, Di Somma A, Enseñat J, de Notaris M, Iaconetta G. The Sellar Region as Seen from Transcranial and Endonasal Perspectives: Exploring Bony Landmarks Through New Surface Photorealistic Three-Dimensional Model Reconstruction for Neurosurgical Anatomy Training. World Neurosurg 2024; 185:e367-e375. [PMID: 38342178 DOI: 10.1016/j.wneu.2024.02.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/04/2024] [Indexed: 02/13/2024]
Abstract
BACKGROUND Virtual reality-based learning of neuroanatomy is a new feasible method to explore, visualize, and dissect interactively complex anatomic regions. We provide a new interactive photorealistic three-dimensional (3D) model of sellar region microsurgical anatomy that allows side-by-side views of exocranial and endocranial surfaces to be explored, with the aim of assisting young neurosurgery residents in learning microsurgical anatomy of this complex region. METHODS Four head specimens underwent an endoscopic endonasal approach extended to the anterior and posterior skull base to expose the main bony anatomic landmarks of the sellar region. The same bony structures were exposed from a transcranial perspective. By using a photogrammetry method, multiple photographs from both endocranial and exocranial perspectives, different for angulations and depth, were captured, fused, and processed through dedicated software. RESULTS All relevant bony structures were clearly distinguishable in the 3D model reconstruction, which provides several benefits in neuroanatomy learning: first, it replicates bony structures with high degrees of realism, accuracy, and fidelity; in addition, it provides realistic spatial perception of the depth of the visualized structures and their anatomic relationships; again, the 3D model is interactive and allows a 360° self-guided tour of the reconstructed object, so that the learner can read the bones and their anatomic relationship from all desired points of view. CONCLUSIONS Detailed knowledge of key surgical landmarks representing keyholes and/or anatomic structures to not violate is mandatory for safer surgery, especially for a complex region such as the skull base. Highly accurate virtual and functional neurosurgical models, such as photogrammetry, can generate a realistic appearance to further improve surgical simulators and learn neuroanatomy.
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Affiliation(s)
- Sergio Corvino
- Division of Neurosurgery, Department of Neuroscience and Reproductive and Odontostomatological Sciences, Università degli Studi di Napoli "Federico II", Naples, Italy; Department of Neuroscience and Reproductive and Odontostomatological Sciences, Program in Neuroscience, Università degli Studi di Napoli "Federico II", Naples, Italy; Laboratory of Neuroanatomy, EBRIS Foundation, European Biomedical Research Institute of Salerno, Salerno, Italy
| | - Amedeo Piazza
- Laboratory of Neuroanatomy, EBRIS Foundation, European Biomedical Research Institute of Salerno, Salerno, Italy; Division of Neurosurgery, "Sapienza" University of Rome, Rome, Italy
| | - Toma Spiriev
- Department of Neurosurgery, Acibadem Cityclinic University Hospital Tokuda, Sofia, Bulgaria
| | - Roberto Tafuto
- Division of Neurosurgery, Department of Neuroscience and Reproductive and Odontostomatological Sciences, Università degli Studi di Napoli "Federico II", Naples, Italy; Laboratory of Surgical Neuroanatomy, Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Francesco Corrivetti
- Laboratory of Neuroanatomy, EBRIS Foundation, European Biomedical Research Institute of Salerno, Salerno, Italy; Department of Neurosurgery, San Luca Hospital, Salerno, Italy
| | - Domenico Solari
- Division of Neurosurgery, Department of Neuroscience and Reproductive and Odontostomatological Sciences, Università degli Studi di Napoli "Federico II", Naples, Italy
| | - Luigi Maria Cavallo
- Division of Neurosurgery, Department of Neuroscience and Reproductive and Odontostomatological Sciences, Università degli Studi di Napoli "Federico II", Naples, Italy
| | - Alberto Di Somma
- Laboratory of Surgical Neuroanatomy, Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain; Departments of Neurological Surgery, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Joaquim Enseñat
- Departments of Neurological Surgery, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Matteo de Notaris
- Laboratory of Neuroanatomy, EBRIS Foundation, European Biomedical Research Institute of Salerno, Salerno, Italy; Neurosurgical Clinic A.O.U. "San Giovanni di Dio e Ruggi d'Aragona", Salerno, Italy.
| | - Giorgio Iaconetta
- Neurosurgical Clinic A.O.U. "San Giovanni di Dio e Ruggi d'Aragona", Salerno, Italy
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Regef J, Talasila L, Wiercigroch J, Lin RJ, Kahrs LA. Laryngeal surface reconstructions from monocular endoscopic videos: a structure from motion pipeline for periodic deformations. Int J Comput Assist Radiol Surg 2024:10.1007/s11548-024-03118-x. [PMID: 38652415 DOI: 10.1007/s11548-024-03118-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 03/21/2024] [Indexed: 04/25/2024]
Abstract
PURPOSE Surface reconstructions from laryngoscopic videos have the potential to assist clinicians in diagnosing, quantifying, and monitoring airway diseases using minimally invasive techniques. However, tissue movements and deformations make these reconstructions challenging using conventional pipelines. METHODS To facilitate such reconstructions, we developed video frame pre-filtering and featureless dense matching steps to enhance the Alicevision Meshroom SfM pipeline. Time and the anterior glottic angle were used to approximate the rigid state of the airway and to collect frames with different camera poses. Featureless dense matches were tracked with a correspondence transformer across subsets of images to extract matched points that could be used to estimate the point cloud and reconstructed surface. The proposed pipeline was tested on a simulated dataset under various conditions like illumination and resolution as well as real laryngoscopic videos. RESULTS Our pipeline was able to reconstruct the laryngeal region based on 4, 8, and 16 images obtained from simulated and real patient exams. The pipeline was robust to sparse inputs, blur, and extreme lighting conditions, unlike the Meshroom pipeline which failed to produce a point cloud for 6 of 15 simulated datasets. CONCLUSION The pre-filtering and featureless dense matching modules specialize the conventional SfM pipeline to handle the challenging laryngoscopic examinations, directly from patient videos. These 3D visualizations have the potential to improve spatial understanding of airway conditions.
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Affiliation(s)
- Justin Regef
- Medical Computer Vision and Robotics Lab, University of Toronto, Toronto, ON, Canada.
- Department of Mathematical and Computational Sciences, University of Toronto Mississauga, 3359 Mississauga Rd, Mississauga, ON, L5L 1C6, Canada.
| | - Likhit Talasila
- Medical Computer Vision and Robotics Lab, University of Toronto, Toronto, ON, Canada
- Department of Mathematical and Computational Sciences, University of Toronto Mississauga, 3359 Mississauga Rd, Mississauga, ON, L5L 1C6, Canada
| | - Julia Wiercigroch
- Medical Computer Vision and Robotics Lab, University of Toronto, Toronto, ON, Canada
- Department of Computer Science, University of Toronto, 40 St George St, Toronto, ON, M5S 2E4, Canada
| | - R Jun Lin
- Department of Otolaryngology - Head & Neck Surgery, Unity Health Toronto - St. Michael's Hospital, Temerty Faculty of Medicine, University of Toronto, 36 Queen St E, Toronto, ON, M5B 1W8, Canada
| | - Lueder A Kahrs
- Medical Computer Vision and Robotics Lab, University of Toronto, Toronto, ON, Canada
- Department of Mathematical and Computational Sciences, University of Toronto Mississauga, 3359 Mississauga Rd, Mississauga, ON, L5L 1C6, Canada
- Department of Computer Science, University of Toronto, 40 St George St, Toronto, ON, M5S 2E4, Canada
- Department of Otolaryngology - Head & Neck Surgery, Unity Health Toronto - St. Michael's Hospital, Temerty Faculty of Medicine, University of Toronto, 36 Queen St E, Toronto, ON, M5B 1W8, Canada
- Institute of Biomedical Engineering, University of Toronto, 164 College Street, Toronto, ON, M5S 3G9, Canada
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Sieberth T, Meindl M, Sagmeister B, Franckenberg S, Ptacek W. Cost-effective 3D documentation device in forensic medicine. Forensic Sci Int 2024; 357:112005. [PMID: 38522324 DOI: 10.1016/j.forsciint.2024.112005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/27/2023] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
3D documentation in forensics and forensic medicine is being introduced more frequently in various institutes around the world. However, several institutes lack capacity in finances as well as staff to perform 3D documentations regularly. This technical paper aims to present a 3D documentation device that is low cost and easy to use and is a viable entry level solution for forensic medical departments. For this the small single-board computer Raspberry Pi 4 was used in conjunction with its high quality (HQ) camera module to create the 3DLamp - a flexible, low cost and easy to use documentation device. Besides a detailed description of the device this paper also presents four case examples where a 3D documentation was performed and analyses the acquired data and the created 3D models. It was found that the device returns feasible 3D models that appear usable for forensic 3D reconstructions.
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Affiliation(s)
- Till Sieberth
- 3D Centre Zurich, Institute of Forensic Medicine, University of Zurich, Winterthurerstrasse 190/52, Zurich 8057, Switzerland; Institute for Applied Photogrammetry and Geoinformatics, Jade University of Applied Science, Ofener Straße 16/19, Oldenburg D-26121, Germany.
| | - Michael Meindl
- ACMIT GmbH, Austrian Center for Medical Innovation and Technology GmbH, Viktor-Kaplan-Straße 2, Wiener Neustadt 2700, Austria
| | - Bernhard Sagmeister
- ACMIT GmbH, Austrian Center for Medical Innovation and Technology GmbH, Viktor-Kaplan-Straße 2, Wiener Neustadt 2700, Austria
| | - Sabine Franckenberg
- Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich 8091, Switzerland
| | - Wolfgang Ptacek
- ACMIT GmbH, Austrian Center for Medical Innovation and Technology GmbH, Viktor-Kaplan-Straße 2, Wiener Neustadt 2700, Austria
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Brands D, Vomáčko V, Grouve W, Wijskamp S, Akkerman R. Dataset with press forming results of unidirectional thermoplastic composite laminates including in-plane deformation data for validation of forming simulations. Data Brief 2024; 53:110099. [PMID: 38361974 PMCID: PMC10867620 DOI: 10.1016/j.dib.2024.110099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/18/2024] [Accepted: 01/18/2024] [Indexed: 02/17/2024] Open
Abstract
Truncated hemisphere parts were press formed with two commercially available unidirectional thermoplastic composite materials, namely Toray TC1225 and Solvay APC. The width and layup of the laminates were varied to influence the wrinkling severity, to trigger various deformation mechanisms and to influence the amount of in-plane deformation. A total of eight layup/width combinations were selected and formed in triplicate for both materials, resulting in the analysis of 48 parts in total. The wrinkling defects are clearly observed due to an intentional gap between the forming tools at the end of forming. Further, a dot pattern with a resolution of 3 mm was applied to the laminates prior to forming using a photoresist mask, sandblasting and heat resistant spray paint. The locations of the dots before and after forming were measured using photogrammetry and are provided in the dataset as a triangular mesh including a precision metric. Matlab functions, bundled with this dataset, allow for the reproduction of the deformation calculations and averages. Lastly, a Matlab App (GUI) is provided for easy visualization of the data. This dataset can serve as a reference for validation of composite forming simulations.
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Affiliation(s)
- Dennis Brands
- Production Technology, Faculty of Engineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands
- ThermoPlastic Composites Research Center (TPRC), Palatijn 15, 7521 PN Enschede, the Netherlands
| | - Václav Vomáčko
- ThermoPlastic Composites Research Center (TPRC), Palatijn 15, 7521 PN Enschede, the Netherlands
- Institute of New Technologies and Applied Informatics, Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, 461 17 Liberec, Czech Republic
| | - Wouter Grouve
- Production Technology, Faculty of Engineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands
| | - Sebastiaan Wijskamp
- ThermoPlastic Composites Research Center (TPRC), Palatijn 15, 7521 PN Enschede, the Netherlands
| | - Remko Akkerman
- Production Technology, Faculty of Engineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands
- ThermoPlastic Composites Research Center (TPRC), Palatijn 15, 7521 PN Enschede, the Netherlands
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Bockel T, Marre G, Delaruelle G, Agel N, Boissery P, Guilhaumon F, Mouquet N, Mouillot D, Guilbert A, Deter J. Early signals of Posidonia oceanica meadows recovery in a context of wastewater treatment improvements. Mar Pollut Bull 2024; 201:116193. [PMID: 38428047 DOI: 10.1016/j.marpolbul.2024.116193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/21/2024] [Accepted: 02/21/2024] [Indexed: 03/03/2024]
Abstract
Natural ecological restoration is a cornerstone of modern conservation science and managers need more documented "success stories" to lead the way. In French mediterranean sea, we monitored Posidonia oceanica lower limit using acoustic telemetry and photogrammetry and investigated the descriptors driving its variations, at a national scale and over more than a decade. We showed significant effects of environmental descriptors (region, sea surface temperature and bottom temperature) but also of wastewater treatment plant (WWTP) effluents proxies (size of WWTP, time since conformity, and distance to the closest effluent) on the meadows lower limit progression. This work indicates a possible positive response of P. oceanica meadows to improvements in wastewater treatment and a negative effect of high temperatures. While more data is needed, the example of French wastewater policy should inspire stakeholders and coastal managers in their efforts to limit anthropogenic pressures on vulnerable ecosystems.
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Affiliation(s)
- Thomas Bockel
- Andromède océanologie, 7 place Cassan, Carnon plage, 34130 Mauguio, France; MARBEC, UMR IRD-CNRS-UM-IFREMER 9190, Université Montpellier, 34095 Montpellier Cedex, France.
| | - Guilhem Marre
- Andromède océanologie, 7 place Cassan, Carnon plage, 34130 Mauguio, France
| | | | - Noémie Agel
- Andromède océanologie, 7 place Cassan, Carnon plage, 34130 Mauguio, France
| | - Pierre Boissery
- Agence de l'Eau Rhône-Méditerranée-Corse, Délégation de Marseille, immeuble CMCI, 2 rue Henri Barbusse, CS 90464, 13207 Marseille Cedex 01, France
| | - François Guilhaumon
- MARBEC, UMR IRD-CNRS-UM-IFREMER 9190, Université Montpellier, 34095 Montpellier Cedex, France
| | - Nicolas Mouquet
- MARBEC, UMR IRD-CNRS-UM-IFREMER 9190, Université Montpellier, 34095 Montpellier Cedex, France; FRB - CESAB, Institut Bouisson Bertrand, 5, rue de l'École de médecine, 34000 Montpellier, France
| | - David Mouillot
- MARBEC, UMR IRD-CNRS-UM-IFREMER 9190, Université Montpellier, 34095 Montpellier Cedex, France
| | - Antonin Guilbert
- Andromède océanologie, 7 place Cassan, Carnon plage, 34130 Mauguio, France
| | - Julie Deter
- Andromède océanologie, 7 place Cassan, Carnon plage, 34130 Mauguio, France; MARBEC, UMR IRD-CNRS-UM-IFREMER 9190, Université Montpellier, 34095 Montpellier Cedex, France
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Piazza A, Spiriev T, Corvino S, Corrivetti F, Laleva L, Iaconetta G, de Notaris M. The Course of the Trochlear Nerve Presented via a 3-Dimensional Photorealistic Anatomic Model. World Neurosurg 2024:S1878-8750(24)00483-2. [PMID: 38548050 DOI: 10.1016/j.wneu.2024.03.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/16/2024] [Accepted: 03/18/2024] [Indexed: 04/28/2024]
Abstract
OBJECTIVES Several factors contribute to the anatomical complexity of the trochlear nerve, including small diameter, complex and longest intracranial course, deep location, and numerous neurovascular relationships. A 3-dimensional (3D) photorealistic model of the cranial nerves provides a detailed and immersive representation of the anatomy, enabling one to improve surgical planning, advanced surgical research, and training. The purpose of this work is to present a 3D photogrammetric study for a more intuitive and interactive way to explore and describe the entire course of trochlear nerve. METHODS Two injected-fixed head human specimens (4 sides) were examined. The dissection protocol was divided into the following steps: 1) brain hemisphere exposure; 2) hemispherectomy dissecting all cranial nerves and partial removal of the free edge of the tentorium; 3) middle fossa and lateral wall of cavernous sinus exposure; and 4) orbital exposure. A detailed 3D photogrammetric model was generated for each dissection step. RESULTS Four main volumetric models were generated during a step-by-step layered dissection of the entire nerve pathway highlighting its different segments. Finally, a full and integrated model of the entire course of the nerve was created. The models are available for visualization on monoscopic display, virtual, and augmented reality environment. CONCLUSIONS The present photogrammetric model provides a more comprehensive understanding of the nerve's anatomy in its different segments, allows for customizable views thus simulating different perspectives, and can be a valuable alternative to traditional dissections. It is an advanced tool for surgical planning and surgical simulation as well as virtual reality representation of the anatomy.
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Affiliation(s)
- Amedeo Piazza
- Department of Neurosurgery, Sapienza University, Rome, Italy; Laboratory of Neuroanatomy, EBRIS Foundation, Salerno, Italy
| | - Toma Spiriev
- Department of Neurosurgery, Acibadem Cityclinic University Hospital Tokuda, Sofia, Bulgaria
| | - Sergio Corvino
- Laboratory of Neuroanatomy, EBRIS Foundation, Salerno, Italy; Department of Neurosurgery, Acibadem Cityclinic University Hospital Tokuda, Sofia, Bulgaria; Department of Neurosciences, Reproductive and Odontostomatological Sciences, Neurosurgical Clinic, School of Medicine, University of Naples "Federico II", Naples, Italy
| | - Francesco Corrivetti
- Laboratory of Neuroanatomy, EBRIS Foundation, Salerno, Italy; Department of Neurosurgery, Acibadem Cityclinic University Hospital Tokuda, Sofia, Bulgaria; Department of Neurosciences, Reproductive and Odontostomatological Sciences, Neurosurgical Clinic, School of Medicine, University of Naples "Federico II", Naples, Italy; Department of Neurosurgery, San Luca Hospital, Vallo della Lucania, Salerno, Italy.
| | - Lili Laleva
- Department of Neurosurgery, Acibadem Cityclinic University Hospital Tokuda, Sofia, Bulgaria
| | - Giorgio Iaconetta
- Unit of Neurosurgery, University Hospital San Giovanni di Dio e Ruggi d'Aragona, University of Salerno, Salerno, Italy
| | - Matteo de Notaris
- Laboratory of Neuroanatomy, EBRIS Foundation, Salerno, Italy; Department of Neurosurgery, Acibadem Cityclinic University Hospital Tokuda, Sofia, Bulgaria; Department of Neurosciences, Reproductive and Odontostomatological Sciences, Neurosurgical Clinic, School of Medicine, University of Naples "Federico II", Naples, Italy; Department of Neurosurgery, San Luca Hospital, Vallo della Lucania, Salerno, Italy; Unit of Neurosurgery, University Hospital San Giovanni di Dio e Ruggi d'Aragona, University of Salerno, Salerno, Italy; Neuroanatomy Committee of the Italian Society of Neurosurgery, SINch, Italy
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Revilla-León M, Gómez-Polo M, Drone M, Barmak AB, Guinot-Barona C, Att W, Kois JC, Alonso Pérez-Barquero J. Impact of scanning distance on the accuracy of a photogrammetry system. J Dent 2024; 142:104854. [PMID: 38246309 DOI: 10.1016/j.jdent.2024.104854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 12/26/2023] [Accepted: 01/18/2024] [Indexed: 01/23/2024] Open
Abstract
PURPOSE To measure the impact of the scanning distance on the accuracy of complete-arch implant scans acquired by using a photogrammetry (PG) system. MATERIAL AND METHODS An edentulous cast with 6 implant abutment analogs was obtained. A brand new implant scan body was positioned on each implant abutment and digitized using an extraoral scanner (T710; Medit) and the reference file was obtained. Three groups were created based on the scanning distance used to acquire complete-arch implant scans by using a PG (PIC System; PIC Dental): 20 (20 group), 30 (30 group), and 35 cm (35 group). An optical marker (PIC Transfer, HC MUA Metal; PIC Dental) was placed on each implant abutment and a total of thirty scans per group were acquired. Euclidean linear and angular measurements were obtained on the reference file was obtained and used to compare the discrepancies with the same measurements obtained on each experimental scan. One-way ANOVA and Tukey tests were used to analyze trueness. The Levene test was used to analyze the precision values (α = 0.05). RESULTS Significant linear (P < .001) and angular trueness (P < .001) discrepancies were found among the groups. For linear trueness, Tukey test showed that the 20 and 30 groups (P < .001) and 30 and 35 groups were different (P < .001). For angular trueness, the Tukey test revealed that 20 and 30 groups (P = .003), 20 and 35 (P < .001), and 30 and 35 groups were different (P < .001) The Levene test showed no significant linear precision (P = .197) and angular discrepancies (P = .229) among the groups. CONCLUSIONS The scanning distance influenced the trueness of complete-arch implant scans obtained with the PG method tested. The maximum linear trueness mean discrepancy among the groups tested was 10 µm and the maximum angular trueness mean discrepancy among the groups tested was 0.02 .
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Affiliation(s)
- Marta Revilla-León
- Graduate Prosthodontics, Department of Restorative Dentistry, School of Dentistry, Faculty & Director of Research and Digital Dentistry, Kois Center, University of Washington, Seattle, WA, United States; Graduate Prosthodontics, Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, MA, United States
| | - Miguel Gómez-Polo
- Department of Conservative Dentistry and Prosthodontics, School of Dentistry, Complutense University of Madrid, Pza. Ramón y Cajal s/n., Madrid 28033, Spain.
| | | | - Abdul B Barmak
- Clinical Research and Biostatistics, Eastman Institute of Oral Health, University of Rochester Medical Center, Rochester, NY, United States
| | - Clara Guinot-Barona
- Department of Dental Orthodontics, Faculty of Medicine and Health Sciences, Universidad Católica de Valencia, Valencia, Spain
| | - Wael Att
- Founder and Director, The Face Dental Group, Boston, MA, United States; Department of Prosthodontics, University Hospital of Freiburg, Germany
| | - John C Kois
- Founder and Director Kois Center, Affiliate Professor, Graduate Prosthodontics, Department of Restorative Dentistry, School of Dentistry, University of Washington, and Private Practice, Seattle, WA, United States
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Rustemeyer J, Spatny C. Accuracy of the CAD/CAM technique compared with the conventional technique used for stand-alone genioplasty. Int J Oral Maxillofac Surg 2024:S0901-5027(24)00035-3. [PMID: 38402022 DOI: 10.1016/j.ijom.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/26/2024]
Abstract
The benefit of the computer-aided design and manufacturing (CAD/CAM) technique for stand-alone genioplasty remains uncertain and was evaluated in this study. Patients who underwent a conventional genioplasty (n = 20) or genioplasty with the CAD/CAM technique (n = 20), and for whom cephalometry and photogrammetry were performed before and 6 months after surgery, were included. Deviations from predictions of the soft tissue pogonion (Pg'), lip inferior point to aesthetic line (Li-Esth), facial convexity angle (FCA), mentolabial angle (MLA), and ratios of soft to hard tissue movements were calculated. No significant deviation was observed for Pg' in either the conventional group (3.85 ± 4.36 mm; 1.91 ± 1.11 mm) or CAD/CAM group (1.28 ± 1.16 mm; 2.81 ± 3.08 mm), for horizontal and vertical movements, respectively. However, for forward movement, deviation from the prediction of Pg´ in the CAD/CAM group was significantly lower than that in the conventional group (P = 0.015). Deviations of Li-Esth, MLA, and FCA did not differ significantly between the groups. No definite preference for the CAD/CAM technique could be established, because deviations from predictions were not significant in either of the technique groups and lay within the clinically acceptable range.
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Affiliation(s)
- J Rustemeyer
- Department of Oral and Maxillofacial Surgery and Plastic Surgery, Klinikum Bremen-Mitte, Medical School of the University of Göttingen, Bremen, Germany.
| | - C Spatny
- Department of Oral and Maxillofacial Surgery and Plastic Surgery, Klinikum Bremen-Mitte, Medical School of the University of Göttingen, Bremen, Germany
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11
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Pal A, Patel T, Khro K. A comparative study of the effectiveness of photogrammetric versus manual anthropometric measurements. Work 2024:WOR230276. [PMID: 38363628 DOI: 10.3233/wor-230276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024] Open
Abstract
BACKGROUND The accurate measurement of the human body is essential when it comes to designing agricultural tools and equipment that can effectively accommodate and interact with individuals when performing a task. The traditional method for measuring an individual's body measurements is highly complex and requires two or more skilled individuals and reliable measurement tools. Finding a new approach that is speedier, more precise, and less expensive than current methods is therefore necessary. OBJECTIVE This study aims to develop an inexpensive novel photogrammetric anthropometric measurement setup that can extract the dimensions of an individual subject irrespective of their body shape. METHODS This study involved the creation of a setup comprising four cameras for a 360° photoshoot of human subjects to calibrate and test the developed measurement setup for capturing photos of human subjects and compare the results with manual measurements. RESULTS Ten different body dimensions were measured using the setup. There was a significant correlation between the manual and photogrammetric measurement methods (0.943 < r < 0.997). The highest absolute error recorded was 1.87% . CONCLUSION The photogrammetric method for collecting anthropometric data is a reliable substitute for manual measurements across diverse populations. The results indicate that this low-cost approach is highly precise and reliable, with strong correlation to manual measurements. Multiview photogrammetry proves effective for individuals of various body shapes, making it a versatile option for data collection.
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Affiliation(s)
- Anubhab Pal
- Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh, India
| | - Thaneswer Patel
- Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh, India
| | - Keneiselie Khro
- Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh, India
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Beri A, Pisulkar SK, Paikrao B, Bagde A, Bansod A, Shrivastava A, Jain R. Quantitate evaluation of photogrammetry with CT scanning for orbital defect. Sci Rep 2024; 14:3104. [PMID: 38326414 PMCID: PMC10850061 DOI: 10.1038/s41598-024-53826-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 02/05/2024] [Indexed: 02/09/2024] Open
Abstract
Facial deformities can be caused by cancer, tumours, trauma, infections, congenital or acquired defects and may lead to alteration in basic functions such as communication, breathing, and mastication and aesthetic thereby affecting quality of life. Traditional processes for manufacturing maxillofacial prostheses involve complicated, time-consuming and tedious processes for the patient and the operator. Impression of the defect area, which is the one of the crucial step in fabrication of prosthesis, is the longest and most difficult process as it requires a long contact with the patient. The digital revolution is now changing the landscape of prosthetic production and making the impression making procedure simpler. Digital technology reduces patient chair side time by providing more accurate display data in less time (3-5 min) than traditional methods. Digital impressions eliminate the need for bulky impression materials and provide a more comfortable patient experience.
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Affiliation(s)
- Arushi Beri
- Department of Prosthodontics, Crown and Bridge, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Sawangi (Meghe), Wardha, Maharashtra, 442001, India.
| | - Sweta Kale Pisulkar
- Department of Prosthodontics, Crown and Bridge, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Sawangi (Meghe), Wardha, Maharashtra, 442001, India
| | - Balaji Paikrao
- Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, M.S., 44200, India
| | - Ashutosh Bagde
- Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, M.S., 44200, India
| | - Akansha Bansod
- Department of Prosthodontics, Crown and Bridge, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Sawangi (Meghe), Wardha, Maharashtra, 442001, India
| | - Akshay Shrivastava
- Department of Orthodontics, Kalinga Institute of Dental Sciences (DU), Bhubaneshwar, Odisha, India
| | - Ritul Jain
- Department of Prosthodontics, Crown and Bridge, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Sawangi (Meghe), Wardha, Maharashtra, 442001, India
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13
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Daffin L, Innes S, Stuelcken MC. An investigation of the reproducibility of a self-selected natural feet position when standing: Implications for the assessment of upright standing posture. Musculoskelet Sci Pract 2024; 69:102896. [PMID: 38101271 DOI: 10.1016/j.msksp.2023.102896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/14/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND Photogrammetry is often used to evaluate standing static postural alignment. Patients are often instructed to self-select a natural feet position but it's unclear whether this position can be consistently replicated across repeated assessments. OBJECTIVE To determine whether people can replicate a self-selected natural feet position in upright standing across three sessions on different days. DESIGN Between days test-retest reliability. SETTING University laboratory. METHODS Three variables - Base of Support (BoS), Foot Width (FW), Feet Opening Angle (FOA) - were measured from foot tracings of 150 participants (18-30 years) using established procedures. BoS data were assessed for systematic bias (Analysis of Variance), and absolute (Coefficient of Variation - CV%) and relative (Intraclass Correlation Coefficient - ICC) reliability. RESULTS There was systematic bias in the BoS data across the three testing sessions. The CV% for the BoS data was 15.2%. The ICC (95% CI) for the BoS data was 0.84 (0.79-0.87). There were moderate-large correlations between the BoS and both FOA and FW respectively within each session. CONCLUSION If clinicians want to allow patients to use their self-selected natural feet position for repeated photogrammetric assessment of their static postural alignment it would be better to standardise the position of the feet, for example, by creating a tracing of a patient's self-selected natural feet position.
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Affiliation(s)
- Lee Daffin
- School of Allied Health, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia.
| | - Stanley Innes
- Research Associate, Eastern Adult Health Mental Health and Wellbeing Program, Victoria, Australia; Faculty of Allied Health & Wellbeing, UCLAN, Preston, UK.
| | - Max C Stuelcken
- School of Health, University of the Sunshine Coast (UniSC), 90 Sippy Downs Dr, Sippy Downs, 4556, Queensland, Australia.
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14
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Türk Y, Özçelik V, Akduman E. Capabilities of using UAVs and close range photogrammetry to determine short-term soil losses in forest road cut slopes in semi-arid mountainous areas. Environ Monit Assess 2024; 196:149. [PMID: 38221529 DOI: 10.1007/s10661-024-12339-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
The soil losses that are caused should be examined by monitoring the forest roads in the periods after they are built. In traditional soil loss determination studies that require intensive labour, due to difficulties in parcel setup, leaks from the connection points of the system, overflow of the material in the storage units and regular follow-up of the precipitation, etc., the system has its disadvantages. In this study, studies were carried out to evaluate the possibilities of using UAV and close range photogrammetry (CRP) methods, which are remote sensing techniques, and to determine the soil losses in forest road cut slopes in semi-arid mountainous areas. In addition, the advantages and disadvantages of the methods are discussed. A 100-m section of the secondary forest road was chosen as the study area. Data acquisition was carried out by UAV and CRP methods in the period of May 2020-November 2020. In the results of the study, the volumetric deformation per unit area results, a - 0.0060 m3m-2 erosion amount and a 0.0046 m3m-2 accumulation amount were determined by UAV. In addition, in the photogrammetric method, a - 0.0050 m3m-2 erosion amount and a 0.0031 m3m-2 accumulation amount were found. When both methods were compared temporally, the processes took approximately 2 times longer in the CRP method. In addition, while the ground sampling distance of DEMs and orthophotos produced with the UAV was 2 cm, it was obtained as 1 cm in the CRP method and terrestrial receptions were found to be 2 times higher resolution. According to the results obtained, the CRP method gives results that are more accurate in such studies.
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Affiliation(s)
- Yılmaz Türk
- Faculty of Forestry, Düzce University, Konuralp Campus, 81620, Düzce, Turkey.
| | - Vuralhan Özçelik
- Institute of Postgraduate Education, Düzce University, Konuralp Campus, 81620, Düzce, Turkey
| | - Emirhan Akduman
- Faculty of Forestry, Düzce University, Konuralp Campus, 81620, Düzce, Turkey
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15
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Choi TM, Liu X, Abdel-Alim T, van Veelen ML, Mathijssen IMJ, Wolvius EB, Roshchupkin GV. Automated three-dimensional analysis of facial asymmetry in patients with syndromic coronal synostosis: A retrospective study. J Craniomaxillofac Surg 2024; 52:48-54. [PMID: 38135649 DOI: 10.1016/j.jcms.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/04/2023] [Accepted: 11/23/2023] [Indexed: 12/24/2023] Open
Abstract
Craniosynostosis, characterized by premature fusion of one or more cranial sutures, results in a distorted skull shape. Only three studies have assessed facial asymmetry manually in unicoronal synostosis patients. It is therefore important to understand how uni- and bicoronal synostosis affect facial asymmetry with a minimum risk of human bias. An automated algorithm was developed to quantify facial asymmetry from three-dimensional images, generating a mean facial asymmetry (MFA) value in millimeters to reflect the degree of asymmetry. The framework was applied to analyze postoperative 3D images of syndromic patients (N = 35) diagnosed with Muenke syndrome, Saethre-Chotzen syndrome, and TCF12-related craniosynostosis with respect to MFA values from a healthy control group (N = 89). Patients demonstrated substantially higher MFA values than controls: Muenke syndrome (unicoronal 1.74 ± 0.40 mm, bicoronal 0.77 ± 0.21 mm), Saethre-Chotzen syndrome (unicoronal 1.15 ± 0.20 mm, bicoronal 0.69 ± 0.16 mm), and TCF12-related craniosynostosis (unicoronal 1.40 ± 0.51 mm, bicoronal 0.66 ± 0.05 mm), compared with controls (0.49 ± 0.12 mm). Longitudinal analysis identified an increasing MFA trend in unicoronal synostosis patients. Our study revealed higher MFA in syndromic patients with uni- and bicoronal synostosis compared with controls, with the most pronounced MFA in Muenke syndrome patients with unilateral synostosis. Bicoronal synostosis patients demonstrated higher facial asymmetry than expected given the condition's symmetrical presentation.
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Affiliation(s)
- Tsun Man Choi
- Erasmus Medical Centre, Department of Oral Maxillofacial Surgery, Special Dental Care and Orthodontics, Dutch Craniofacial Centre, Rotterdam, the Netherlands.
| | - Xianjing Liu
- Erasmus Medical Centre, Department of Oral Maxillofacial Surgery, Special Dental Care and Orthodontics, Dutch Craniofacial Centre, Rotterdam, the Netherlands; Erasmus Medical Centre, Department of Radiology and Nuclear Medicine, Rotterdam, the Netherlands
| | - Tareq Abdel-Alim
- Erasmus Medical Centre, Department of Radiology and Nuclear Medicine, Rotterdam, the Netherlands; Erasmus Medical Centre, Department of Neurosurgery, Dutch Craniofacial Centre, Rotterdam, the Netherlands
| | - Marie-Lise van Veelen
- Erasmus Medical Centre, Department of Neurosurgery, Dutch Craniofacial Centre, Rotterdam, the Netherlands
| | - Irene Margreet Jacqueline Mathijssen
- Erasmus Medical Centre, Department of Plastic and Reconstructive Surgery and Hand Surgery, Dutch Craniofacial Centre, Rotterdam, the Netherlands
| | - Eppo Bonne Wolvius
- Erasmus Medical Centre, Department of Oral Maxillofacial Surgery, Special Dental Care and Orthodontics, Dutch Craniofacial Centre, Rotterdam, the Netherlands
| | - Gennady Vasilievich Roshchupkin
- Erasmus Medical Centre, Department of Radiology and Nuclear Medicine, Rotterdam, the Netherlands; Erasmus Medical Centre, Department of Epidemiology, Rotterdam, the Netherlands
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16
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Chen Q, Liang Z, Wang Q, Ma C, Lei Y, Sanderson JE, Hu X, Lin W, Liu H, Xie F, Jiang H, Fang F. Self-helped detection of obstructive sleep apnea based on automated facial recognition and machine learning. Sleep Breath 2023; 27:2379-2388. [PMID: 37278870 DOI: 10.1007/s11325-023-02846-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/16/2023] [Accepted: 05/01/2023] [Indexed: 06/07/2023]
Abstract
PURPOSE The diagnosis of obstructive sleep apnea (OSA) relies on time-consuming and complicated procedures which are not always readily available and may delay diagnosis. With the widespread use of artificial intelligence, we presumed that the combination of simple clinical information and imaging recognition based on facial photos may be a useful tool to screen for OSA. METHODS We recruited consecutive subjects suspected of OSA who had received sleep examination and photographing. Sixty-eight points from 2-dimensional facial photos were labelled by automated identification. An optimized model with facial features and basic clinical information was established and tenfold cross-validation was performed. Area under the receiver operating characteristic curve (AUC) indicated the model's performance using sleep monitoring as the reference standard. RESULTS A total of 653 subjects (77.2% males, 55.3% OSA) were analyzed. CATBOOST was the most suitable algorithm for OSA classification with a sensitivity, specificity, accuracy, and AUC of 0.75, 0.66, 0.71, and 0.76 respectively (P < 0.05), which was better than STOP-Bang questionnaire, NoSAS scores, and Epworth scale. Witnessed apnea by sleep partner was the most powerful variable, followed by body mass index, neck circumference, facial parameters, and hypertension. The model's performance became more robust with a sensitivity of 0.94, for patients with frequent supine sleep apnea. CONCLUSION The findings suggest that craniofacial features extracted from 2-dimensional frontal photos, especially in the mandibular segment, have the potential to become predictors of OSA in the Chinese population. Machine learning-derived automatic recognition may facilitate the self-help screening for OSA in a quick, radiation-free, and repeatable manner.
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Affiliation(s)
- Qi Chen
- Sleep Medical Center, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Zhe Liang
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Qing Wang
- Department of Automation, Tsinghua University, Beijing, China
- Pharmacovigilance Research Center for Information Technology and Data Science, Cross-Strait Tsinghua Research Institute, Xiamen, China
| | - Chenyao Ma
- Sleep Medical Center, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Yi Lei
- School of Software Engineering, Faculty of Information Technology, Beijing University of Technology, Beijing, China
| | - John E Sanderson
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Xu Hu
- Automation School, Beijing University of Posts and Telecommunications, Beijing, China
| | - Weihao Lin
- Automation School, Beijing University of Posts and Telecommunications, Beijing, China
| | - Hu Liu
- Sleep Medical Center, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Fei Xie
- Sleep Medical Center, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Hongfeng Jiang
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
| | - Fang Fang
- Sleep Medical Center, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
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17
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Vélez S, Ariza-Sentís M, Valente J. VineLiDAR: High-resolution UAV-LiDAR vineyard dataset acquired over two years in northern Spain. Data Brief 2023; 51:109686. [PMID: 37915834 PMCID: PMC10616138 DOI: 10.1016/j.dib.2023.109686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/08/2023] [Accepted: 10/11/2023] [Indexed: 11/03/2023] Open
Abstract
LiDAR (Light Detection and Ranging) technology's precision in data collection has gained immense traction in the field of remote sensing, particularly in Precision Agriculture using Unmanned Aerial Vehicles (UAVs). To fulfill the pressing need for public UAV LiDAR datasets in the domain of Agricultural Sciences, especially for woody crops such as vineyards, this study presents an extensive dataset of LiDAR data collected from vineyards in northern Spain. The DJI M300 multi-rotor platform, equipped with a DJI Zenmuse L1 LiDAR sensor, conducted UAV flights at 20, 30, and 50 meters above ground level (AGL) across two vineyards during three development stages in 2021 and 2022. This dataset is composed of ten high-density 3D LiDAR point clouds stored in .laz format with embedded RGB information in each point. It provides insights into vineyard morphology and development, thereby aiding in the optimization of vineyard management strategies. Furthermore, it serves as a valuable tool for agricultural robotics, offering comprehensive terrain information for developing efficient flight paths and navigation algorithms. Finally, it serves as a reliable "ground truth" dataset to validate satellite-derived models, facilitating the creation of highly accurate digital elevation models (DEMs) and other derived models.
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Affiliation(s)
| | - Mar Ariza-Sentís
- Information Technology Group, Wageningen University & Research, 6708 PB Wageningen, the Netherlands
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18
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Pucciarelli MGR, Toyoshima GHL, Neppelenbroek KH, Sforza C, Oliveira TM, Soares S. A Stereo photogrammetry Face Study Between Dentate and Edentulous Adults Rehabilitated with Either a Conventional Complete or an Implant-Supported Fixed Complete Denture. Eur J Prosthodont Restor Dent 2023; 31:407-415. [PMID: 37382334 DOI: 10.1922/ejprd_1530pucciarelli09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/14/2023] [Indexed: 06/30/2023]
Abstract
Quantifying in edentulous patients the facial collapse and whether complete conventional denture (CCD) and implant-supported fixed complete denture (ISFCD) can restore the facial proportions to match those of a dentate patient (CG) is relevant for clinical dentists. One hundred and four participants were enrolled and divided into edentulous (n=56) and CG (n=48). The edentulous participants were rehabilitated with CCD (n=28) or ISFCD (n=28) in both arches. Anthropometric landmarks in the face were marked and captured by stereophotogrammetry. Linear, angular, and surface measurements were analyzed and compared among groups. The statistical analysis was performed by an independent t-test, the one-way ANOVA, and Tukey's test. The significance level was set at 0.05. The facial collapse was quantified as a significant shortening of the lower third of the face affecting facial aesthetics in all parameters evaluated and the same was observed in comparison among CCD, ISFCD, and CG. The CCD presented statistical differences with the CG group in the lower third of the face and labial surface, and the ISFCD showed no statistical differences with the CG and CCD. The facial collapse in edentulous patients could be restored through oral rehabilitation with an ISFCD similar to those of dentate patients.
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Affiliation(s)
- M G R Pucciarelli
- Universidade de Säo Paulo - Faculdade de Odontologia de Bauru. Alameda Dr. Octávio Pinheiro Brisolla, 9-75, 17012-901, Brazil
| | - G H L Toyoshima
- Universidade de Säo Paulo - Faculdade de Odontologia de Bauru. Alameda Dr. Octávio Pinheiro Brisolla, 9-75, 17012-901, Brazil
| | - K H Neppelenbroek
- Universidade de Säo Paulo - Faculdade de Odontologia de Bauru. Alameda Dr. Octávio Pinheiro Brisolla, 9-75, 17012-901, Brazil
| | - C Sforza
- Universidade de Säo Paulo - Faculdade de Odontologia de Bauru. Alameda Dr. Octávio Pinheiro Brisolla, 9-75, 17012-901, Brazil
| | - T M Oliveira
- Universidade de Säo Paulo - Faculdade de Odontologia de Bauru. Alameda Dr. Octávio Pinheiro Brisolla, 9-75, 17012-901, Brazil
| | - S Soares
- Universidade de Säo Paulo - Faculdade de Odontologia de Bauru. Alameda Dr. Octávio Pinheiro Brisolla, 9-75, 17012-901, Brazil
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19
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Lima LS, Ristum M. Development through Borders: Photogrammetry of a Moving Experience. Integr Psychol Behav Sci 2023:10.1007/s12124-023-09810-y. [PMID: 37917303 DOI: 10.1007/s12124-023-09810-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2023] [Indexed: 11/04/2023]
Abstract
Recognizing the variety of borders that gather and divide our world, such as geographical, temporal, social and psychological, the study highlights that the transit across these borders drives changes and continuities that contribute to human development. The research emphasizes the relevance of reviewing both the individual singularities and the shared aspects of border crossing experiences. The matching of these approaches allows building theoretical models referring to those experiences. Thus, this article aims to review borders crossing as a developmental and abductively generalizable process. Through the analogy between Abductive Generalization and photogrammetry, the study proposes an innovative way of representing these complex experiences. Three ways of border crossing - spatial displacement, imagination and social interactions - are explored in terms of their developmental potential. Using a case study of psychologists in a humanitarian non-governmental organization - NGO, an abductively generalized model is presented highlighting the spatial, cultural and psychological dimensions involved. In addition, the study proposes a three-dimensional helical model of development inspired by photogrammetry, incorporating principles of this technique to improve the understanding on the border crossing process. By recognizing mesogenetic influences, such as institutional and cultural dimensions, the article puts forward an interdisciplinary approach to understand development through border crossing. The models presented may potentially drive future research and interventions in Semiotic Cultural Psychology, enriching the promotion of human development in different border contexts. The study fosters the extension of this work by including several perspectives, methods and paradigms.
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Affiliation(s)
- Leonardo Silva Lima
- Institute of Psychology, Federal University of Bahia, St. General Labatut, Building 18, Salvador, BA, 40070100, Brazil.
| | - Marilena Ristum
- Institute of Psychology, Federal University of Bahia, St. General Labatut, Building 18, Salvador, BA, 40070100, Brazil
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20
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Đokić M, Manić M, Đorđević M, Gocić M, Čupić A, Jović M, Dragović R, Gajić B, Smičiklas I, Dragović S. Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia. Environ Res 2023; 235:116679. [PMID: 37454795 DOI: 10.1016/j.envres.2023.116679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 07/10/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
Gully erosion leads to the formation of deep and wide channels that increase the risk of soil loss, flooding, and water pollution. In addition, this process reduces the productivity and viability of agricultural land and natural ecosystems. Preventing gully erosion is critical for maintaining ecological balance and preserving natural resources in certain areas. This paper presents a methodology integrating remote sensing and nuclear techniques to study gully erosion. The morphometric characterization of gullies using 360-degree camera photogrammetry was introduced as a new method in erosion research. This approach aims to investigate the suitability of unmanned aerial vehicle and terrestrial photogrammetry for modeling gullies, to study the variability of erosion processes in gullies at a small scale, and to compare the differences in erosion intensity between nearby gullies. The study's objectives include identifying the effective and economical method for gullies monitoring and providing a starting point for controlling and safeguarding gullies. Mainly erosion process was detected in the studied gullies, while deposition was identified at only 2 out of 39 sampling locations. The results showed an average soil redistribution rate of 16.2 t ha-1 yr-1 and coefficients of variation of 32%, 59%, and 91% for three investigated gullies. It was determined that aerial photogrammetry methods were not practical under the conditions prevailing in the study area. Highly detailed 3D models of the gullies were created using 360-degree photogrammetry. It was confirmed that the micro-relief obtained by photogrammetric modeling is an essential contribution to erosion research. The 360-degree camera photogrammetry serves as a reliable tool for analyzing the morphology of gullies and, in perspective, tracking changes in gully systems over time or monitoring the effectiveness of the applied protection measures.
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Affiliation(s)
- Mrđan Đokić
- University of Niš, Faculty of Sciences and Mathematics, Department of Geography, Višegradska 33, 18000, Niš, Serbia.
| | - Miloš Manić
- University of Belgrade, Faculty of Geography, Studentski Trg 3, 11000, Belgrade, Serbia
| | - Milan Đorđević
- University of Niš, Faculty of Sciences and Mathematics, Department of Geography, Višegradska 33, 18000, Niš, Serbia
| | - Milena Gocić
- University of Niš, Faculty of Sciences and Mathematics, Department of Geography, Višegradska 33, 18000, Niš, Serbia
| | - Aleksandar Čupić
- "VINČA" Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12-14, 11351, Belgrade, Serbia
| | - Mihajlo Jović
- "VINČA" Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12-14, 11351, Belgrade, Serbia
| | - Ranko Dragović
- University of Niš, Faculty of Sciences and Mathematics, Department of Geography, Višegradska 33, 18000, Niš, Serbia
| | - Boško Gajić
- University of Belgrade, Faculty of Agriculture, Nemanjina 6, 11080, Beograd, Serbia
| | - Ivana Smičiklas
- "VINČA" Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12-14, 11351, Belgrade, Serbia
| | - Snežana Dragović
- "VINČA" Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12-14, 11351, Belgrade, Serbia
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21
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Engleman A, Cox K, Brooke S. Dead but not forgotten: complexity of Acropora palmata colonies increases with greater composition of dead coral. PeerJ 2023; 11:e16101. [PMID: 37842045 PMCID: PMC10576496 DOI: 10.7717/peerj.16101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 08/25/2023] [Indexed: 10/17/2023] Open
Abstract
Coral reefs are highly biodiverse ecosystems that have declined due to natural and anthropogenic stressors. Researchers often attribute reef ecological processes to corals' complex structure, but effective conservation requires disentangling the contributions of coral versus reef structures. Many studies assessing the relationships between reef structure and ecological dynamics commonly use live coral as a proxy for reef complexity, disregarding the contribution of dead coral skeletons to reef habitat provision or other biogeochemical reef dynamics. This study aimed to assess the contribution of dead coral to reef complexity by examining structural variations in live and dead Acropora palmata colonies. We used photogrammetry to reconstruct digital elevation models (DEMs) and orthomosaics of the benthic region immediately surrounding 10 A. palmata colonies. These reconstructions were used to quantify structural metrics, including surface rugosity, fractal dimension, slope, planform curvature, and profile curvature, as a function of benthic composition (i.e., live A. palmata, dead A. palmata, or non-A. palmata substrate). The results revealed that dead coral maintained more varied profile curvatures and higher fractal dimensions than live or non-coral substrate. Conversely, A. palmata colonies with a higher proportion of live coral displayed more uniform structure, with lower fractal dimensions and less variability in profile curvature measures. Other metrics showed no significant difference among substrate types. These findings provide novel insights into the structural differences between live and dead coral, and an alternative perspective on the mechanisms driving the observed structural complexity on reefs. Overall, our results highlight the overlooked potential contributions of dead coral to reef habitat provision, ecological processes, and other biogeochemical reef dynamics, and could have important implications for coral reef conservation.
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Affiliation(s)
- Abigail Engleman
- Department of Biological Science, Florida State University, Tallahassee, United States of America
- Coastal and Marine Laboratory, Florida State University, St. Teresa, FL, United States of America
- Marine Station, Smithsonian, Fort Pierce, FL, United States of America
| | - Kieran Cox
- Marine Station, Smithsonian, Fort Pierce, FL, United States of America
- Biology Department, University of Victoria, Victoria, British Columbia, Canada
- Hakai Institute, Calvert Island, British Columbia, Canada
| | - Sandra Brooke
- Coastal and Marine Laboratory, Florida State University, St. Teresa, FL, United States of America
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Wang J, Wu YL, Ma J, Wu F, Li DH. A novel technique for implant-supported fixed complete rehabilitation based on a dynamic virtual patient. J Dent 2023; 137:104649. [PMID: 37574104 DOI: 10.1016/j.jdent.2023.104649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 07/28/2023] [Accepted: 08/01/2023] [Indexed: 08/15/2023] Open
Abstract
BACKGROUND A digital workflow for implant-supported fixed complete prostheses (ISFCP) using photogrammetry (PG), virtual articulator (VA), and virtual facebow (VF) data remains a challenge. METHODS The novel ISFCP technique included four steps: (1) formation of a dynamic virtual patient, (2) integration of PG data, (3) fabrication of a diagnostic ISFCP, and (4) fabrication of a definitive ISFCP and test of the deviation. RESULTS Dynamic virtual patients were formed by integrating PG, VA, and VF data. The cumulative root mean square deviation between the designed data and actual definitive prosthesis was 140.4 µm. CONCLUSIONS The novel technique for ISFCP fabrication described in this paper can help optimise the clinical efficiency and quality of ISFCP but requires an initial learning curve. CLINICAL SIGNIFICANCE This technique provides a direct workflow, using PG, VA, and VF data, to fabricate ISFCP based on the provisional restoration.
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Affiliation(s)
- Jing Wang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Oral Implants, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, PR China
| | - Yu-Lu Wu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Dental Laboratory, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, PR China
| | - Jing Ma
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Dental Laboratory, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, PR China
| | - Fan Wu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Oral Implants, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, PR China
| | - De-Hua Li
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Oral Implants, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, PR China.
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23
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Soumboundou S, Ndiaye ML, Marcellin Nouaman N, Farhat O, Abdou Lecor P. Three-dimensional anthropometric study of the facial morphology of black African Senegalese: 3D photogrammetric approach. J Oral Biol Craniofac Res 2023; 13:522-526. [PMID: 37361669 PMCID: PMC10285636 DOI: 10.1016/j.jobcr.2023.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/29/2022] [Accepted: 05/30/2023] [Indexed: 06/28/2023] Open
Abstract
Introduction Anthropometric features are important in determining gender and ethnic groups. The aim of this 3D photogrammetric study was to assess the face of Senegalese subjects. Material and methods A total of 104 3D facial photographs taken with the Bellus 3D application were studied. Measurements were taken at various anthropometric points using Meshlab software. The acquired data were recorded and processed using Jamovi software version 1.8.4.0. Correlations between the quantitative variables were tested and only one with a significance of p 0.05 was retained. Results Overall, measured distances were higher in men. A statistically significant difference between men and women was found for nose width (p0. 001), face width (p < 0.005) and face height (p0. 0002). Conclusion: 3D anthropometric analysis shows a fairly significant sexual dimorphism, with males having greater facial and nasal proportions. A leptoprosopic (long) facial shape and a mesorrhine nose were maintained.
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Affiliation(s)
| | - Mamadou Lamine Ndiaye
- Department of Dento-maxillofacial Radiology, Cheikh Anta Diop University Dakar, Senegal
| | | | - Ons Farhat
- Department of Conservative Odontology, Cheikh Anta Diop University, Dakar, Senegal
| | - Papa Abdou Lecor
- Department of Basic Materials, Cheikh Anta Diop University Dakar, Senegal
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24
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Bertazzo TL, D'Ornellas MC. Protocol for capturing 3D facial meshes for rhinoseptoplasty planning. Braz J Otorhinolaryngol 2023; 89:101289. [PMID: 37467657 PMCID: PMC10372377 DOI: 10.1016/j.bjorl.2023.101289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 05/09/2023] [Accepted: 06/27/2023] [Indexed: 07/21/2023] Open
Abstract
OBJECTIVES To present and execute a protocol for the capture of 3D facial images using photogrammetry through the open access software Blender and its add-on OrtogOnBlender (OOB) and to evaluate the compatibility of the 3D meshes generated with Computed tomography (CT) of the sinuses. METHODS Individuals >18 years old, candidates for Rhinoseptoplasty in a tertiary hospital, were submitted to a photographic session to perform the standardized protocol. In the session, divided into 3 phases, sequential photos were taken for processing the photogrammetry in the OOB and producing 3D meshes of the face. The photogrammetry reconstructions were compared with the reference mesh of the soft tissue surface of the Sinus CT scan to assess compatibility between them. RESULTS 21 patients were included, 67% female. 3 photogrammetry meshes and 1 CT reference mesh were generated, which demonstrated matching compatibility, as most of the mean distances between cloud points were <1.48 mm. Phase 3 of the session with the highest number of photos (54.36 ± 15.05) generated the most satisfactory mesh with the best resolution. CONCLUSIONS The proposed protocol is reproducible and feasible in clinical practice, generated satisfactory 3D meshes of the face, being a potential tool for surgical planning and comparison of results. For the implementation of photogrammetry for use in 3D anthropometry, it is necessary to validate this method. LEVEL OF EVIDENCE: 3 OCEBM Levels of Evidence Working Group.1 "The Oxford 2011 Levels of Evidence". Oxford Centre for Evidence-Based Medicine. http://www.cebm.net/index.aspx?o=5653.
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Affiliation(s)
- Taíse Leitemperger Bertazzo
- Universidade Federal de Santa Maria (UFSM), Centro de Ciências da Saúde (CCS), Programa de Pós-Graduação Mestrado Profissional em Ciências da Saúde, Santa Maria, RS, Brazil.
| | - Marcos Cordeiro D'Ornellas
- Universidade Federal de Santa Maria (UFSM), Departamento de Computação Aplicada, Santa Maria, RS, Brazil
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25
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Titcomb DA, Melton BF, Miyashita T, Bland HW. The Effects of Postural Education or Corrective Exercise on the Craniovertebral Angle in Young Adults with Forward Head Posture: A Randomized Controlled Trial. Int J Exerc Sci 2023; 16:954-973. [PMID: 37649869 PMCID: PMC10464763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The purpose of this study was to compare the effects of three different intervention strategies, postural education (PE) and two corrective exercise programs (CEPs), on the craniovertebral angle (CVA) in young adults with forward head posture (FHP). A prospective four-arm parallel randomized controlled trial with repeated measures was performed. Seventy-nine healthy young adults (55 women, 24 men; mean age: 20.08 ± 2.19 years) with FHP were randomized into four groups: PE group, self-myofascial release + stretching group (SMRS), self-myofascial release + stretching + strengthening group (SMRSS), and a control group (CG). Participant CVA (°) was assessed before and after a 4-week intervention. Seventy-two participants completed the trial. Mean difference comparisons of within-group change in mean CVA revealed an increase in the PE (MD = 3.1, p < .01), SMRS (MD = 3.8, p < .01), and SMRSS (MD = 4.4, p < .01) groups. Mean difference comparison of between-group change in mean CVA supported greater CVA change in the SMRS and SMRSS groups compared to the CG (F(3, 68) = 5.26, p < .01, η2 = .188). All three interventions appear to be effective techniques for improving FHP in young adults, however CEPs may provide superior outcomes than PE alone. A 4-week CEP consisting of self-myofascial release + stretching may yield similar CVA enhancements as a CEP consisting of self-myofascial release + stretching + strengthening. Study findings can assist fitness professionals in designing evidence-based FHP intervention programs for young adults.
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Affiliation(s)
- David A Titcomb
- Department of Allied Health Professions, Liberty University, Lynchburg, VA, USA
- Department of Health Sciences and Human Performance, Concordia University-Chicago, River Forest, IL, USA
| | - Bridget F Melton
- Department of Health Sciences and Kinesiology, Georgia Southern University, Statesboro, GA, USA
| | - Theresa Miyashita
- Department of Health Sciences and Human Performance, Concordia University-Chicago, River Forest, IL, USA
| | - Helen W Bland
- Department of Health Policy and Community Health, Georgia Southern University, Statesboro, GA, USA
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26
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Zhang C, Valente J, Wang W, van Dalfsen P, de Jong PF, Rijk B, Kooistra L. Data on three-year flowering intensity monitoring in an apple orchard: A collection of RGB images acquired from unmanned aerial vehicles. Data Brief 2023; 49:109356. [PMID: 37492231 PMCID: PMC10365931 DOI: 10.1016/j.dib.2023.109356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/24/2023] [Accepted: 06/26/2023] [Indexed: 07/27/2023] Open
Abstract
There is a growing body of literature that recognises the importance of UAVs in precision agriculture tasks. Currently, flowering thinning tasks in orchard management rely on the decisions derived from time-consuming manual flower cluster counting in the field by an agrotechnician. Yet it is hard to guarantee the counting accuracy due to numerous human factors. The present dataset contains UAV images during the full blooming period of an apple orchard for three consecutive years, 2018, 2019, and 2020. It is directly linked to a research article entitled "Feasibility assessment of tree-level flower intensity quantification from UAV RGB imagery: A triennial study in an apple orchard". The data collection site was an apple orchard located at Randwijk, Overbetuwe, The Netherlands (51.938, 5.7068 in WGS84 UTM 31U). Moreover, the flower cluster number and floridity ground truth are also provided in one row from the orchard. The UAV flights were conducted with different flying altitudes, camera resolutions, and lighting conditions. This dataset aims to support researchers focussing on remote sensing, machine vision, deep learning, and image classification, and the stakeholders interested in precision horticulture and orchard management. It can be used for flowering intensity estimation and prediction, and spatial and temporal flowering variability mapping by using digital photogrammetry and 3D reconstruction.
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Affiliation(s)
- Chenglong Zhang
- Laboratory of Geo-information Science and Remote Sensing, Wageningen University & Research, Droevendaalsesteeg 3, 6708 PB Wageningen, the Netherlands
- Agricultural Information Institute, Chinese Academy of Agriculture Science, Beijing 100086, China
| | - João Valente
- Information Technology Group, Wageningen University & Research, Hollandseweg 1, 6706 KN Wageningen, the Netherlands
| | - Wensheng Wang
- Agricultural Information Institute, Chinese Academy of Agriculture Science, Beijing 100086, China
| | - Pieter van Dalfsen
- Field Crops, Wageningen University & Research, Lingewal 1, 6668 LA Randwijk, the Netherlands
| | - Peter Frans de Jong
- Field Crops, Wageningen University & Research, Lingewal 1, 6668 LA Randwijk, the Netherlands
| | - Bert Rijk
- Aurea Imaging BV, Nijverheidsweg 16B, 3534AM Utrecht, the Netherlands
| | - Lammert Kooistra
- Laboratory of Geo-information Science and Remote Sensing, Wageningen University & Research, Droevendaalsesteeg 3, 6708 PB Wageningen, the Netherlands
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Lozares-Cordero S, Bermejo-Barbanoj C, Badías-Herbera A, Ibáñez-Carreras R, Ligorred-Padilla L, Ponce-Ortega JM, González-Pérez V, Gandía-Martínez A, Font-Gómez JA, Blas-Borroy O, González-Ibáñez D. An open-source development based on photogrammetry for a real-time IORT treatment planning system. Phys Med 2023; 112:102622. [PMID: 37331081 DOI: 10.1016/j.ejmp.2023.102622] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 06/02/2023] [Accepted: 06/06/2023] [Indexed: 06/20/2023] Open
Abstract
PURPOSE This study presents a treatment planning system for intraoperative low-energy photon radiotherapy based on photogrammetry from real images of the surgical site taken in the operating room. MATERIAL AND METHODS The study population comprised 15 patients with soft-tissue sarcoma. The system obtains the images of the area to be irradiated with a smartphone or tablet, so that the absorbed doses in the tissue can be calculated from the reconstruction without the need for computed tomography. The system was commissioned using 3D printing of the reconstructions of the tumor beds. The absorbed doses at various points were verified using radiochromic films that were suitably calibrated for the corresponding energy and beam quality. RESULTS The average reconstruction time of the 3D model from the video sequence in the 15 patients was 229,6±7,0 s. The entire procedure, including video capture, reconstruction, planning, and dose calculation was 520,6±39,9 s. Absorbed doses were measured on the 3D printed model with radiochromic film, the differences between these measurements and those calculated by the treatment planning system were 1.4% at the applicator surface, 2.6% at 1 cm, 3.9% at 2 cm and 6.2% at 3 cm. CONCLUSIONS The study shows a photogrammetry-based low-energy photon IORT planning system, capable of obtaining real-time images inside the operating room, immediately after removal of the tumor and immediately before irradiation. The system was commissioned with radiochromic films measurements in 3D-printed model.
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Affiliation(s)
- Sergio Lozares-Cordero
- Physics and Radiation Protection Department, Miguel Servet University Hospital, Zaragoza, Spain.
| | | | - Alberto Badías-Herbera
- Higher Technical School of Industrial Engineering, Polytechnic University of Madrid, Spain
| | | | - Luis Ligorred-Padilla
- Esophagogastric Surgery and Sarcoma Unit (Department of General and Gastrointestinal Surgery), Miguel Servet University Hospital, Zaragoza, Spain
| | | | | | | | - José Antonio Font-Gómez
- Physics and Radiation Protection Department, Miguel Servet University Hospital, Zaragoza, Spain
| | - Olga Blas-Borroy
- Engineering and Maintenance Service, Miguel Servet University Hospital, Zaragoza, Spain
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Rutkūnas V, Gedrimienė A, Mischitz I, Mijiritsky E, Huber S. EPA Consensus Project Paper: Accuracy of Photogrammetry Devices, Intraoral Scanners, and Conventional Techniques for the Full-Arch Implant Impressions: A Systematic Review. Eur J Prosthodont Restor Dent 2023. [PMID: 37314199 DOI: 10.1922/ejprd_2481rutkunas12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 04/18/2023] [Indexed: 06/15/2023]
Abstract
PURPOSE The objective of this systematic review was to evaluate and compare the accuracy of digital impression techniques and conventional methods for full-arch implant impressions. METHODS An electronic literature search in the databases Medline (Pubmed), Web of Science, and Embase was performed to identify in vitro and in vivo publications (between 2016 and 2022) directly comparing digital and conventional abutment-level impression techniques. All selected articles passed through the data extraction procedure according to defined parameters in inclusion and exclusion criteria. Measurements on linear, angular and/or surface deviations were performed in all selected articles. RESULTS Nine studies met the inclusion criteria and were selected for this systematic review. 3 articles were clinical studies and 6 studies were in vitro. Accuracy difference mean values of the trueness up to 162+/-77μm between digital and conventional techniques were reported in the clinical studies and up to 43μm in laboratory studies. Methodological heterogeneity was observed in both, in vivo and in vitro studies. CONCLUSIONS Intraoral scanning and photogrammetric method showed comparable accuracy for registering implant positions in the full-arch edentulous cases. A tolerable implant prosthesis misfit threshold and objective misfit assessment criteria (for linear and angular deviations) should be verified in clinical studies.
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Affiliation(s)
- V Rutkūnas
- Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Žalgirio g. 115, Vilnius, LITHUANIA
| | - A Gedrimienė
- Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Žalgirio g. 115, Vilnius, LITHUANIA
| | - I Mischitz
- Department of Dental Medicine and Oral Health, Medical University of Graz, Billrothgasse 4, 8010 Graz, AUSTRIA
| | - E Mijiritsky
- Head and Neck Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Department of Otolaryngology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 699350, ISRAEL
| | - S Huber
- Department of Dental Medicine and Oral Health, Medical University of Graz, Billrothgasse 4, 8010 Graz, AUSTRIA
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Poór VS. Phone cam array - An open-source, modular photogrammetry system made of Android phones. HardwareX 2023; 14:e00438. [PMID: 37288362 PMCID: PMC10242632 DOI: 10.1016/j.ohx.2023.e00438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/09/2023]
Abstract
Photogrammetry is a 3D reconstruction technique using photographs of the target from multiple angles. Taking pictures around a static object with a single camera can yield high-quality models, but if the subject moves between images, 3D reconstruction might fail. One way to mitigate this is to use multiple cameras. This project aimed to develop a tool for fast and precise wound documentation for clinical forensic medicine. This paper describes a simple, low-cost modular system, where smartphones of different manufacturers are used as networked cameras. Exposure is initiated at the same time in all the phones with a simple circuit emulating a headset button press. A proof-of-concept device was built, where four phones (Huawei nova 8i (2 pcs), Samsung Galaxy S7 Edge, Oukitel K4000 Pro) were attached to a curved, 3D-printed, handheld frame. The average delay of image capture was 636 ms between the quickest and the slowest phones. When compared to the single-camera approach, the use of different cameras did not reduce the quality of the 3D model. The phone cam array was less susceptible to movement artefacts caused by breathing. Wound assessment was possible based on the 3D models created with this device.
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30
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Xavier DD, Graf RM, Ferreira AS. Short-Term Changes in Posture and Pain of the Neck and Lower Back of Women Undergoing Lipoabdominoplasty: A Case Series Report. J Chiropr Med 2023; 22:138-147. [PMID: 37346239 PMCID: PMC10280349 DOI: 10.1016/j.jcm.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 11/20/2022] Open
Abstract
Objective The purpose of this study was to analyze short-term variations in posture and intensity of neck and lower back pain in women undergoing lipoabdominoplasty. Methods This prospective case series study involved 17 women (age 43 ± 12 years, presurgical body mass index 27.0 ± 3.7 kg/m2). Participants were assessed preoperatively (T0) and at 15 (T15) and 30 days (T30) after surgery for clinical data (number of pregnancies, number of deliveries, presurgical body mass), neck and lower back angles calculated by photogrammetry, and pain intensity by numeric pain rating scale. Postoperative complications were assessed at T15 and T30. Results After adjusting for age and presurgical body mass index, there was an increase in forward head position in T15 and a return by T30 (marginal R2 = 0.411). The lower back showed an increase in flexion at T15 and return by T30 (marginal R2 = 0.266). No statistical evidence of significance was observed for changes in the intensity of neck (P > .355) or lower back (P > .293) pain. Complications were mild and common at T15; most of them resumed at T30. Conclusion A transient, nonlinear compensatory change in neck and lower back lordosis was observed 15 days after lipoabdominoplasty, with almost full recovery in the short term (30 days). No systematic change in pain intensity was observed within this period. Postsurgical complications were mild and common, and most of them resumed shortly after surgery.
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Affiliation(s)
- Denise D. Xavier
- Postgraduate Program in Rehabilitation Sciences, Central University of Augusto Motta, Rio de Janeiro, Brazil
| | | | - Arthur S. Ferreira
- Postgraduate Program in Rehabilitation Sciences, Central University of Augusto Motta, Rio de Janeiro, Brazil
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31
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da Silva JC, Strazzi-Sahyon HB, Andreo JC, Spin MD, Nunes GP, Shinohara AL. A systematic review of photogrammetry as a reliable methodology in gender identification of human skull. J Forensic Leg Med 2023; 97:102546. [PMID: 37307776 DOI: 10.1016/j.jflm.2023.102546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 05/09/2023] [Accepted: 05/29/2023] [Indexed: 06/14/2023]
Abstract
One of the most important parameters in the identification process in forensic Medicine and Dentistry is the determination of sex through the skull, based on morphological and metric dimorphism. Photogrammetry is an affordable option that allows the reconstruction of position, orientation, shape, and size, allowing the performance of quantitative and qualitative analyzes to identify the sex of the individual. However, there are few systematic reviews in the literature validating whether photogrammetry is a reliable methodology for sexual identification using human skulls. Therefore, the objective of the current systematic review was to validate whether photogrammetry of dry skulls is reliable as a method for calculating sex in human identification. This revision follows the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) and was recorded in the Prospective International Systematic Reviews Registry (PROSPERO) (CRD420223 Systematic Registry) (CRD420223). The inclusion criteria for selecting the studies were based on the PICO question: "Is test photogrammetry reliable as a method for estimating sex in human identification?". A literature search for studies was performed in the databases MEDLINE Scopus, Web of Science, LILACS, and the Cochrane Library. The Kappa agreement presented an approval level of (k = 0.93). This systematic review analyzed 11 ex-vivo studies published between 2001 and 2021. The risk of bias was considered low in 8 of the studies, and high in 3 studies. Based on this systematic review, it can be concluded that the photogrammetry method is viable and reliable in identifying sexual dimorphism.
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Affiliation(s)
- Juliana Calistro da Silva
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo - USP, Bauru, SP, Brazil.
| | - Henrico Badaoui Strazzi-Sahyon
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo - USP, Bauru, SP, Brazil.
| | - Jesus Carlos Andreo
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo - USP, Bauru, SP, Brazil.
| | - Maurício Donalonso Spin
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo - USP, Bauru, SP, Brazil.
| | - Gabriel Pereira Nunes
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University - UNESP, Araçatuba, SP, Brazil.
| | - André Luís Shinohara
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo - USP, Bauru, SP, Brazil.
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Roncoroni M, Mancini D, Miesen F, Müller T, Gianini M, Ouvry B, Clémençon M, Lardet F, Battin TJ, Lane SN. Decrypting the stream periphyton physical habitat of recently deglaciated floodplains. Sci Total Environ 2023; 867:161374. [PMID: 36621504 DOI: 10.1016/j.scitotenv.2022.161374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/21/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
The rapid recession of glaciers is exposing large zones to the development of embryonic phototrophic ecosystems and eventual ecological succession. Traditionally, succession patterns in glacial forefields have been seen as a response to time since deglaciation, but nowadays forefield exposure is so rapid that this theory may be less applicable. In this succession process, periphyton are potential pioneer organisms because of their role in modifying the local environment (e.g. access to water) to create conditions conducive to plant colonization. In this paper, we aim to decrypt the physical properties of the habitats that define the spatial and temporal assemblage of periphyton during the melt-season of an Alpine temperate glacier in the context of rapid climate change. We show that periphyton develop in glacial floodplains throughout the melt-season and could extend to cover significant surfaces. However, development is only possible when the combined conditions of stability and water accessibility are met. In glacial floodplains, stable zones exist and are typically located on terraces; but they can also be locally found for much shorter periods in the more active, glacial-stream reworked zone. On terraces, water accessibility can be a limit due to well-drained sediments, but when present, often aided by the role that biofilms play in creating an impermeable layer, it provides a stable and clear water source that biofilms could exploit. In the active part of the braid plain, whilst water availability is very high, the water is harsh (low temperature, high turbidity) and erosive. Therein, periphyton can rapidly exploit short windows of opportunity but the habitat conditions rarely remain stable for long enough for continuous periphyton cover to develop. Thus, the role of periphyton in ecosystem succession is strongly conditioned by the spatial extent of the active zone, itself a function of high rates of glacier melt and sediment supply associated with rapid glacier retreat.
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Affiliation(s)
- Matteo Roncoroni
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland.
| | - Davide Mancini
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
| | - Floreana Miesen
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
| | - Tom Müller
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
| | - Mattia Gianini
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
| | - Boris Ouvry
- Glaciology and Geomorphodynamics group, Physical Geography Division, Department of Geography, University of Zurich, Zurich, Switzerland
| | - Mélanie Clémençon
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
| | - Frédéric Lardet
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
| | - Tom J Battin
- River Ecosystems Laboratory, Alpine and Polar Environmental Research Center Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Stuart N Lane
- Institute of Earth Surface Dynamics, University of Lausanne, UNIL Mouline, Lausanne, Switzerland
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Bartella AK, Laser J, Kamal M, Krause M, Neuhaus M, Pausch NC, Sander AK, Lethaus B, Zimmerer R. Accuracy of low-cost alternative facial scanners: a prospective cohort study. Oral Maxillofac Surg 2023; 27:33-41. [PMID: 35249150 PMCID: PMC9938030 DOI: 10.1007/s10006-022-01050-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 02/13/2022] [Indexed: 05/27/2023]
Abstract
INTRODUCTION Three-dimensional facial scans have recently begun to play an increasingly important role in the peri-therapeutic management of oral and maxillofacial and head and neck surgery cases. Face scan images can be generated by optical facial scanners utilizing line-laser, stereophotography, or structured light modalities, as well as from volumetric data: for example, from cone beam computed tomography (CBCT). This study aimed to evaluate whether two low-cost procedures for the creation of three-dimensional face scan images were capable of producing sufficiently accurate data sets for clinical analysis. MATERIALS AND METHODS Fifty healthy volunteers were included in the study. Two test objects with defined dimensions (Lego bricks) were attached to the forehead and the left cheek of each volunteer. Facial anthropometric values (i.e., the distances between the medial canthi, the lateral canthi, the nasal alae, and the angles of the mouth) were first measured manually. Subsequently, face scans were performed with a smart device and manual photogrammetry and the values obtained were compared with the manually measured data sets. RESULTS The anthropometric distances deviated, on average, 2.17 mm from the manual measurements (smart device scanning deviation 3.01 mm, photogrammetry deviation 1.34 mm), with seven out of eight deviations being statistically significant. For the Lego brick, from a total of 32 angles, 19 values demonstrated a significant difference from the original 90° angles. The average deviation was 6.5° (smart device scanning deviation 10.1°, photogrammetry deviation 2.8°). CONCLUSION Manual photogrammetry demonstrated greater accuracy when creating three-dimensional face scan images; however, smart devices are more user-friendly. Dental professionals should monitor camera and smart device technical improvements carefully when choosing and adequate technique for 3D scanning.
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Affiliation(s)
- Alexander K Bartella
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany.
| | - Josefine Laser
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Mohammad Kamal
- Department of Surgical Sciences, Faculty of Dentistry, Kuwait University, Safat, Kuwait
| | - Matthias Krause
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Michael Neuhaus
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Niels C Pausch
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Anna K Sander
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Bernd Lethaus
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Rüdiger Zimmerer
- Department of Oral and Maxillofacial Surgery, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
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Douglass M, Gorayski P, Patel S, Santos A. Synthetic cranial MRI from 3D optical surface scans using deep learning for radiation therapy treatment planning. Phys Eng Sci Med 2023; 46:367-375. [PMID: 36752996 PMCID: PMC10030422 DOI: 10.1007/s13246-023-01229-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 01/29/2023] [Indexed: 02/09/2023]
Abstract
BACKGROUND Optical scanning technologies are increasingly being utilised to supplement treatment workflows in radiation oncology, such as surface-guided radiotherapy or 3D printing custom bolus. One limitation of optical scanning devices is the absence of internal anatomical information of the patient being scanned. As a result, conventional radiation therapy treatment planning using this imaging modality is not feasible. Deep learning is useful for automating various manual tasks in radiation oncology, most notably, organ segmentation and treatment planning. Deep learning models have also been used to transform MRI datasets into synthetic CT datasets, facilitating the development of MRI-only radiation therapy planning. AIMS To train a pix2pix generative adversarial network to transform 3D optical scan data into estimated MRI datasets for a given patient to provide additional anatomical data for a select few radiation therapy treatment sites. The proposed network may provide useful anatomical information for treatment planning of surface mould brachytherapy, total body irradiation, and total skin electron therapy, for example, without delivering any imaging dose. METHODS A 2D pix2pix GAN was trained on 15,000 axial MRI slices of healthy adult brains paired with corresponding external mask slices. The model was validated on a further 5000 previously unseen external mask slices. The predictions were compared with the "ground-truth" MRI slices using the multi-scale structural similarity index (MSSI) metric. A certified neuro-radiologist was subsequently consulted to provide an independent review of the model's performance in terms of anatomical accuracy and consistency. The network was then applied to a 3D photogrammetry scan of a test subject to demonstrate the feasibility of this novel technique. RESULTS The trained pix2pix network predicted MRI slices with a mean MSSI of 0.831 ± 0.057 for the 5000 validation images indicating that it is possible to estimate a significant proportion of a patient's gross cranial anatomy from a patient's exterior contour. When independently reviewed by a certified neuro-radiologist, the model's performance was described as "quite amazing, but there are limitations in the regions where there is wide variation within the normal population." When the trained network was applied to a 3D model of a human subject acquired using optical photogrammetry, the network could estimate the corresponding MRI volume for that subject with good qualitative accuracy. However, a ground-truth MRI baseline was not available for quantitative comparison. CONCLUSIONS A deep learning model was developed, to transform 3D optical scan data of a patient into an estimated MRI volume, potentially increasing the usefulness of optical scanning in radiation therapy planning. This work has demonstrated that much of the human cranial anatomy can be predicted from the external shape of the head and may provide an additional source of valuable imaging data. Further research is required to investigate the feasibility of this approach for use in a clinical setting and further improve the model's accuracy.
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Affiliation(s)
- Michael Douglass
- Department of Radiation Oncology, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia.
- Australian Bragg Centre for Proton Therapy and Research, SAHMRI, Adelaide, SA, 5000, Australia.
- School of Physical Sciences, University of Adelaide, Adelaide, SA, 5005, Australia.
| | - Peter Gorayski
- Department of Radiation Oncology, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia
- Australian Bragg Centre for Proton Therapy and Research, SAHMRI, Adelaide, SA, 5000, Australia
- University of South Australia, Allied Health & Human Performance, Adelaide, SA, 5000, Australia
| | - Sandy Patel
- Department of Radiology, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia
| | - Alexandre Santos
- Department of Radiation Oncology, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia
- Australian Bragg Centre for Proton Therapy and Research, SAHMRI, Adelaide, SA, 5000, Australia
- School of Physical Sciences, University of Adelaide, Adelaide, SA, 5005, Australia
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Al-Rudainy D, Adel Al-Lami H, Yang L. Validity and reliability of three-dimensional modeling of orthodontic dental casts using smartphone-based photogrammetric technology. J World Fed Orthod 2023; 12:9-14. [PMID: 36528481 DOI: 10.1016/j.ejwf.2022.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/10/2022] [Accepted: 11/18/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND The development of intraoral scanning technology has effectively enhanced the digital documentation of orthodontic dental casts. Albeit, the expense of this technology is the main limitation. The purpose of the present study was to assess the validity and reliability of virtual three-dimensional (3D) models of orthodontic dental casts, which were constructed using smartphone-based 3D photogrammetry. METHODS A smartphone was used to capture a set of two-dimensional images for 30 orthodontic dental casts. The captured images were processed to construct 3D virtual images using Agisoft and 3DF Zephyr software programs. To evaluate the accuracy of the virtual 3D models obtained by the two software programs, the virtual 3D models were compared with cone-beam computed tomography scans of the 30 dental casts. Colored maps were used to express the absolute distances between the points of each compared two surfaces; then, the means of the 100%, 95th, and 90th of the absolute distances were calculated. A Wilcoxon signed-rank test was applied to detect any significant differences. RESULTS The differences between the constructed 3D images and the cone-beam computed tomography scans were not statistically significant and were accepted clinically. The deviations were mostly in the interproximal areas and in the occlusal details (sharp cusps and deep pits and fissures). CONCLUSIONS This study found that smartphone-based stereophotogrammetry is an accurate and reliable method for 3D modeling of orthodontic dental casts, with errors less than the accepted clinically detectable error of 0.5 mm. Smartphone photogrammetry succeeded in presenting occlusal details, but it was difficult to accurately reproduce interproximal areas.
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Affiliation(s)
- Dhelal Al-Rudainy
- Orthodontic Department, College of Dentistry, University of Baghdad, Baghdad, Iraq.
| | - Hadeel Adel Al-Lami
- Orthodontic Department, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Liu Yang
- Departmet of Stomatology, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, Guangdong, China.
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Vélez S, Ariza-Sentís M, Valente J. Dataset on unmanned aerial vehicle multispectral images acquired over a vineyard affected by Botrytis cinerea in northern Spain. Data Brief 2023; 46:108876. [PMID: 36660442 PMCID: PMC9842856 DOI: 10.1016/j.dib.2022.108876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/01/2022] [Accepted: 12/28/2022] [Indexed: 01/04/2023] Open
Abstract
Remote sensing makes it possible to gather data rapidly, precisely, accurately, and non-destructively, allowing it to assess grapevines accurately in near real-time. In addition, multispectral cameras capture information in different bands, which can be combined to generate vegetation indices useful in precision agriculture. This dataset contains 16,504 multispectral images from a 1.06 ha vineyard affected by Botrytis cinerea, in the north of Spain. The photos were taken throughout four UAV flights at 30 m height with varying camera angles on 16 September 2021, the same date as the grape harvest. The first flight took place with the camera tilted at 0° (nadir angle), the second flight at 30°, the third flight at 45°, and the fourth flight was also performed at 0° but was scheduled in the afternoon to capture the shadows of the plants projected on the ground. This dataset was created to support researchers interested in disease detection and, in general, UAV remote sensing in vineyards and other woody crops. Moreover, it allows digital photogrammetry and 3D reconstruction in the context of precision agriculture, enabling the study of the effect of different tilt angles on the 3D reconstruction of the vineyard and the generation of orthomosaics.
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Beri A, Pisulkar SK, Bagde AD, Bansod A, Dahihandekar C, Paikrao B. Evaluation of accuracy of photogrammetry with 3D scanning and conventional impression method for craniomaxillofacial defects using a software analysis. Trials 2022; 23:1048. [PMID: 36575547 PMCID: PMC9793656 DOI: 10.1186/s13063-022-07005-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 12/12/2022] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Facial mutilation and deformities can be caused by cancer, tumours, injuries, infections, and inherited or acquired deformities and has the potential to degrade one's quality of life by interfering with fundamental tasks like communication, breathing, feeding, and aesthetics. Depending on the type of defect, producing maxillofacial prostheses for the rehabilitation of patients with various defects can be challenging and complex. The prosthesis is used to replace missing or damaged parts of the cranium and face, like the nose, auricle, orbit, and surrounding tissues, as well as missing areas of soft and hard tissue, with the primary goal of increasing the patient's quality of life by rehabilitating oral functions such as speech, swallowing, and mastication. Traditional maxillofacial prosthesis impression and fabrication processes include a number of complicated steps that are costly, time-consuming, and uncomfortable for the patient. These rely on the knowledge of the maxillofacial team, dental clinicians, and maxillofacial technician. The foundation of the impression is the keystone for creating a prosthesis. However, this is the most time-consuming and difficult chair-side operation in maxillofacial prosthesis manufacturing since it requires prolonged interaction with the patient. The field of prosthesis fabrication is being transformed by the digital revolution. Digital technology allows for more accurate impression data to be gathered in less time (3 to 5 min) than traditional methods, lowering patient anxiety. Digital impressions eliminate the need for messy impression materials and provide patients with a more pleasant experience. This method bypasses the procedure of traditional gypsum model fabrication. This eliminates the disparity caused by a dimensional distortion of the impression material and gypsum setting expansion. Traditional dental impression processes leave enough room for errors, such as voids or flaws, air bubbles, or deformities, while current technology for prosthesis planning has emerged as an alternative means to improve patient acceptability and pleasure, not only because the end result is a precisely fitted restoration but also because the chair-side adjustments required are reduced. The most frequent approaches for creating 3D virtual models are the following. To begin, 3D scanning is employed, in which the subjects are scanned in three dimensions, and the point cloud data is used to create a virtual digital model. METHODS It will be a hospital-based randomised control trial, carried out at the Department of Prosthodontics, Sharad Pawar Dental College, Sawangi (Meghe), Wardha, a part of Datta Meghe Institute of Medical Sciences (Deemed University). A total of 45 patients will be selected from the outpatient department (OPD) of the Department of Prosthodontics. All the patients will be provided written consent before their participation in the study. METHODOLOGY 1. Patient screening will be done, and the patient will be allocated to three techniques that are the conventional manual method, photogrammetry method, and 3D scanning in a randomised manner 2. The impression of the defect will be recorded by conventional manual method, photogrammetry method, and 3D scanning 3. The defect will be modelled in three ways: first is as per the manual dimension taken on the patient, second is the organisation of photographic image taken with lab standards and third is plotting of point cloud data to generate the virtual 3D model 4. For photogrammetric prosthesis design, finite photos/images will be taken at multiple angles to model the 3D virtual design. With the use of minimum photographs, the 3D modelling can be performed by using freeware, and a mould is obtained 5. The CAD software was used to design the prosthesis, and the final negative mould can be printed using additive manufacturing 6. The mould fabricated by all three methods will be analysed by a software using reverse engineering technology Study design: Randomised control trial Duration: 2 years Sample size: 45 patients DISCUSSION: Rodrigo Salazar-Gamarra1, Rosemary Seelaus, and Jorge Vicente Lopes da Silva et al., in the year 2016, discussed, as part of a method for manufacturing face prostheses utilising a mobile device, free software, and a photo capture protocol, that 2D captures of the anatomy of a patient with a facial defect were converted into a 3D model using monoscopic photogrammetry and a mobile device. The visual and technical integrity of the resulting digital models was assessed. The technological approach and models that resulted were thoroughly explained and evaluated for technical and clinical value. Marta Revilla-León, Wael Att, and Dr Med Dent et al. (2020) used a coordinate measuring equipment which was used to assess the accuracy of complete arch implant impression processes utilising conventional, photogrammetry, and intraoral scanning. Corina Marilena Cristache and Ioana Tudor Liliana Moraru et al. in the year 2021 provided an update on defect data acquisition, editing, and design using open-source and commercially available software in digital workflow in maxillofacial prosthodontics. This research looked at randomised clinical trials, case reports, case series, technical comments, letters to the editor, and reviews involving humans that were written in English and included detailed information on data acquisition, data processing software, and maxillofacial prosthetic part design. TRIAL REGISTRATION CTRI/2022/08/044524. Registered on September 16, 2022.
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Affiliation(s)
- Arushi Beri
- Department of Prosthodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Wardha, India
| | - Sweta Kale Pisulkar
- Department of Prosthodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Wardha, India
| | - Ashutosh D. Bagde
- Faculty of Engineering and Technology, Datta Meghe Institute of Higher Education and Research, Wardha, India
| | - Akansha Bansod
- Department of Prosthodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Wardha, India
| | - Chinmayee Dahihandekar
- Department of Prosthodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research, Wardha, India
| | - Balaji Paikrao
- Datta Meghe Institute of Higher Education and Research, Wardha, India
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Nonnenmacher CH, Nunes I, de Moura BM, Diefenthaeler F, Lima KMME. Does static stretching change uniformly the quadriceps elasticity in physically actives subjects? J Ultrasound 2022; 25:915-921. [PMID: 35412126 PMCID: PMC9705688 DOI: 10.1007/s40477-021-00649-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/11/2021] [Indexed: 10/18/2022] Open
Abstract
PURPOSE Verify the acute responses of static stretching (SS) on the rectus femoris (RF), vastus medialis (VM), and vastus lateralis (VL) elasticity and knee/hip range of motion (ROM). Additionally, to investigate if there are consistency among quadriceps muscle elasticity after SS. METHODS Acute effect of SS on pre-post-intervention design. Thirtheen healthy participants (both genders) proposed for a pre-post experimental design. RF, VM, and VL elasticity (strain ratio, SR) was evaluated bilaterally by ultrasound with quasi-static elastography. Higher SR values refer to more rigid tissues. A SS protocol of 3 series of 30 s was applied at right lower limb. The left lower limb was considered as control group. Also, photogrammetry evaluated the knee/hip ROM. RESULTS For SR muscle comparisons, VM was lower (less stiff) than VL and RF at pre- and post-SS. For time comparisons, no differences were observed for SR and ROM at pre- and post-SS. However, the effect size of the quadriceps SR at SS lower limb was higher than control. CONCLUSION Acute effects of SS did not change the quadriceps SR or knee/hip ROM in healthy and active subjects. Non-uniform quadriceps SR are observed (VM < VL and RF) independently of SS. Future studies should consider different protocols, muscles, and populations.
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Affiliation(s)
- Carolina Holz Nonnenmacher
- Physiotherapy Course, Department of Health Sciences, Federal University of Santa Catarina, Governador Jorge Lacerda, 3201, Araranguá, Santa Catarina, 88906-072, Brazil.
| | - Iohana Nunes
- Post-Graduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Araranguá, 88906-072, Brazil
| | - Bruno Monteiro de Moura
- Biomechanics Laboratory, Department of Physical Education, Sports Center, Federal University of Santa Catarina, Florianópolis, 88040-900, Brazil
| | - Fernando Diefenthaeler
- Biomechanics Laboratory, Department of Physical Education, Sports Center, Federal University of Santa Catarina, Florianópolis, 88040-900, Brazil
| | - Kelly Mônica Marinho E Lima
- Physiotherapy Course, Department of Health Sciences, Federal University of Santa Catarina, Governador Jorge Lacerda, 3201, Araranguá, Santa Catarina, 88906-072, Brazil
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Hsueh WY, Kang KT, Yao CCJ, Chen YJ, Weng WC, Lee PL, Chang CW, Hsu WC. Measurements of craniofacial morphology using photogrammetry in children with sleep-disordered breathing. Int J Pediatr Otorhinolaryngol 2022; 162:111287. [PMID: 36029654 DOI: 10.1016/j.ijporl.2022.111287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/20/2022] [Accepted: 08/12/2022] [Indexed: 10/31/2022]
Abstract
OBJECTIVE To assess the craniofacial morphology in children with sleep-disordered breathing (SDB) using nonradiation and readily accessible photogrammetry technique. METHODS Included children aged 3-18 years with SDB-related symptoms from April 2019 to February 2020 in a tertiary center. All participants underwent craniofacial photogrammetry and overnight polysomnography (PSG). Participants were stratified into 2 groups (obstructive sleep apnea [OSA] group: apnea-hypopnea index [AHI] ≥ 1 and non-OSA group: AHI <1). Craniofacial photogrammetry was performed to derive variables of craniofacial features in standardized frontal and profile views. The 2 groups were propensity score matched based on age, sex, and body mass index (BMI) percentiles. Associations between craniofacial feature variables and OSA (AHI ≥1) likelihood were examined using logistic regression test. intraclass correlation coefficient (ICC) was used to evaluate the intrarater and interrater reliability. RESULTS In total, 58 children were enrolled for the analysis after matching. All 3 variables representing the mandibular plane angle in the profile view were increased in the OSA group (mego-tn: 34.85 ± 5.99 vs 31.65 ± 5.96°, odds ratio [OR]: 1.10, 95% CI:1.02 to 1.18, P = .01; tn-gogn: 28.65 ± 6.38 vs 25.91 ± 5.38°, OR: 1.08, 95% CI:1.02 to 1.15, P = .012; and gome-tsup: 26.71 ± 6.13 vs 22.20 ± 5.89°, OR: 1.13, 95% CI:1.04 to 1.23, P = .003). CONCLUSIONS Craniofacial photogrammetry revealed increased mandibular inclination in children with OSA. A steep mandibular plane with craniofacial photogrammetry is considered a potential predictor of pediatric OSA. Further investigation with a large sample size is required to clarify the validity of photogrammetry in evaluating pediatric OSA.
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Affiliation(s)
- Wan-Yi Hsueh
- Department of Otolaryngology, Hsinchu Cathay General Hospital, Hsinchu, Taiwan; Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan; Department of Biomedical Engineering, Yuanpei University of Medical Technology, Hsinchu, Taiwan; Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kun-Tai Kang
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan; Department of Otolaryngology, Taipei Hospital, Ministry of Health and Welfare, New Taipei City, Taiwan; Institute of Health Policy and Management, National Taiwan University, Taipei, Taiwan
| | - Chung-Chen Jane Yao
- Sleep Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yunn-Jy Chen
- Sleep Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Wen-Chin Weng
- Sleep Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Pei-Lin Lee
- Sleep Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chun-Wei Chang
- Division of Endodontics, Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan
| | - Wei-Chung Hsu
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan; Sleep Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Otolaryngology, College of Medicine, National Taiwan University, Taipei, Taiwan.
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Drizdal T, Paulides MM, Sumser K, Vrba D, Malena L, Vrba J, Fiser O, van Rhoon GC. Application of photogrammetry reconstruction for hyperthermia quality control measurements. Phys Med 2022; 101:87-94. [PMID: 35987024 DOI: 10.1016/j.ejmp.2022.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 08/04/2022] [Indexed: 11/29/2022] Open
Abstract
PURPOSE Hyperthermia is a cancer treatment in which the target region is heated to temperatures of 40-44 °C usually applying external electromagnetic field sources. The behavior of the hyperthermia applicators (antennas) in clinical practice should be periodically checked with phantom experiments to verify the applicator's performance over time. The purpose of this study was to investigate the application of photogrammetry reconstructions of 3D applicator position in these quality control procedure measurements. METHODS Photogrammetry reconstruction was applied at superficial hyperthermia scenario using the Lucite cone applicator (LCA) and phased-array heating in the head and neck region using the HYPERcollar3D. Wire-frame models of the entire measurement setups were created from multiple-view images and used for recreation of the setup inside 3D electromagnetic field simulation software. We evaluated applicator relation (Ra) between measured and simulated absolute specific absorption rate (SAR) for manually created and photogrammetry reconstructed simulation setups. RESULTS We found a displacement of 7.9 mm for the LCA and 8.2 mm for the HYPERcollar3D setups when comparing manually created and photogrammetry reconstructed applicator models placements. Ra improved from 1.24 to 1.18 for the LCA and from 1.17 to 1.07 for the HYPERcollar3D when using photogrammetry reconstructed simulation setups. CONCLUSION Photogrammetry reconstruction technique holds promise to improve measurement setup reconstruction and agreement between measured and simulated absolute SAR.
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Affiliation(s)
- Tomas Drizdal
- Dept. of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, nam. Sitna 3105, 272 01 Kladno, Czech Republic; Hyperthermia Unit, Dept. of Radiation Oncology, Erasmus MC Cancer Institute, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands.
| | - Margarethus M Paulides
- Hyperthermia Unit, Dept. of Radiation Oncology, Erasmus MC Cancer Institute, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands; Dept. of Electrical Engineering, Eindhoven University of Technology, De Rondom 70, 5612 AP Eindhoven, the Netherlands
| | - Kemal Sumser
- Hyperthermia Unit, Dept. of Radiation Oncology, Erasmus MC Cancer Institute, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
| | - David Vrba
- Dept. of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, nam. Sitna 3105, 272 01 Kladno, Czech Republic
| | - Lukas Malena
- Dept. of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, nam. Sitna 3105, 272 01 Kladno, Czech Republic
| | - Jan Vrba
- Dept. of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, nam. Sitna 3105, 272 01 Kladno, Czech Republic
| | - Ondrej Fiser
- Dept. of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, nam. Sitna 3105, 272 01 Kladno, Czech Republic
| | - Gerard C van Rhoon
- Hyperthermia Unit, Dept. of Radiation Oncology, Erasmus MC Cancer Institute, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
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Różański Z, Wrona P, Pach G, Niewiadomski AP, Markowska M, Wrana A, Frączek R, Balcarczyk L, Quintana GV, de Paz Ruiz D. Influence of water erosion on fire hazards in a coal waste dump - A case study. Sci Total Environ 2022; 834:155350. [PMID: 35452740 DOI: 10.1016/j.scitotenv.2022.155350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/13/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Dump fires are a significant environmental problem in post-mining areas. The TEXMIN project has shown that climate change could lead to more extreme weather events in the future, intense precipitation among them. The impact of water erosion on the development of endogenous fires in coal waste heaps has not been investigated thus far. Meteorological data collected from the studied dump area in Libiąż, Poland confirmed that heavy rainfall occurred many times, causing surface erosion on the slope. Gully erosion was observed on the western slope of the heap, the depth of which was up to 1.6 m. Data showed that between areas with and without water erosion, there was a significant difference in measured temperatures and gas concentrations that defined the fire intensity. Erosion facilitated self-heating such that internal temperatures increased to 52.9 °C. Further, at a depth of 1 m in the self-heating zone, maximum gas concentrations were 15.65 vol%. CO2, 10 ppm CO, and 0.435 vol%. CH4, while the O2 concentration dropped below 1.0 vol%. These results show that despite preventative measures, thermal activity reactivated in the vicinity of gully erosion and caused the self-heating zone to expand.
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Affiliation(s)
- Zenon Różański
- Silesian University of Technology, Faculty of Mining, Safety Engineering and Industrial Automation, Akademicka 2, 44-100 Gliwice, Poland.
| | - Paweł Wrona
- Silesian University of Technology, Faculty of Mining, Safety Engineering and Industrial Automation, Akademicka 2, 44-100 Gliwice, Poland.
| | - Grzegorz Pach
- Silesian University of Technology, Faculty of Mining, Safety Engineering and Industrial Automation, Akademicka 2, 44-100 Gliwice, Poland.
| | - Adam P Niewiadomski
- Silesian University of Technology, Faculty of Mining, Safety Engineering and Industrial Automation, Akademicka 2, 44-100 Gliwice, Poland.
| | - Małgorzata Markowska
- Główny Instytut Górnictwa/Central Mining Institute, pl. Gwarków 1, 40-166 Katowice, Poland.
| | - Aleksander Wrana
- Główny Instytut Górnictwa/Central Mining Institute, pl. Gwarków 1, 40-166 Katowice, Poland.
| | - Robert Frączek
- Tauron Wydobycie S. A., Grunwaldzka 37, 43-600 Jaworzno, Poland.
| | | | | | - David de Paz Ruiz
- Subterra Ingenieria S.L., Universidad Politécnica de Madrid, Vallehermoso 18, Madrid 28015, Spain.
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Albuquerque PMNM, Da Silva EPC, Melo TMDS, Montenegro EJN, de Oliveira DA, Guerino MR, De Siqueira GR. Inter-rater Accuracy and Reliability of a Palpation Protocol of the C7 Spinous Process Comprising a Combination of 3 Traditional Palpation Techniques. J Manipulative Physiol Ther 2022; 45:227-234. [PMID: 35879125 DOI: 10.1016/j.jmpt.2022.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 06/08/2022] [Accepted: 06/08/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose of this study was to determine the accuracy and intrarater reliability of a palpatory protocol based on a combination of 3 palpatory methods to identify both the C7 spinous process (C7 SP) and the factors that affect the errors and inaccuracy of palpation. METHODS Twenty-five women between the ages of 18 and 60 years were submitted to a palpation protocol of the C7 SP, and a radiopaque marker was fixed on the skin at the possible location of the vertebrae. A radiograph and a photograph of the cervical spine were obtained in the same posture by a first rater. A second rater performed the same palpation protocol and took a second photograph. The accuracy and measurement error of the palpation protocol of C7 SP were assessed through radiographic images. The inter-rater reliability was estimated by the interclass correlation coefficient and assessed using photographs of each rater. The Pearson's correlation coefficients (r), the Fisher exact test, and the χ2 test were used to identify the factors associated with the error and inaccuracy of palpation. RESULTS Accuracy of the C7 palpation was 76% with excellent reliability (interclass correlation coefficient = 0.99). There was a moderate correlation between weight and the measurement of palpation error (r = -0.6; P = .003). One hundred percent of inaccuracy palpation was related to the increased soft-tissue thickness (P = .005) in the cervical region. CONCLUSION The palpation protocol described in this study was accurate and presented excellent reliability in identifying the C7 SP. Increased weight and dorsocervical fat pad were associated to error and palpation inaccuracy, respectively.
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Affiliation(s)
| | | | - Thania M de S Melo
- Department of Physiotherapy, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Eduardo J N Montenegro
- Department of Physiotherapy, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Daniella A de Oliveira
- Department of Physiotherapy, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Marcelo R Guerino
- Department of Physiotherapy, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Gisela R De Siqueira
- Department of Physiotherapy, Federal University of Pernambuco, Recife, Pernambuco, Brazil.
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Bowden CL, Streit RP, Bellwood DR, Tebbett SB. A 3D perspective on sediment turnover and feeding selectivity in blennies. Mar Pollut Bull 2022; 180:113799. [PMID: 35665616 DOI: 10.1016/j.marpolbul.2022.113799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Sediments in algal turfs can modify a wide variety of key ecological processes on coral reefs. While some larger reef fishes can remove these turf-bound sediments, the role of small, yet abundant, cryptobenthic fishes is currently unclear. To address this knowledge gap, we explored the extent to which the blenny, Ecsenius stictus, can shape sediment dynamics on coral reefs by quantifying their sediment ingestion and space use. Per unit body mass, E. stictus process sediments at comparable rates to key parrotfish and surgeonfish species. However, in absolute terms, E. stictus has a negligible influence on net sediment dynamics, despite their abundance. Behavioural observations and 3D photogrammetry reveal that E. stictus preferentially feed and rest on elevated surfaces; potentially because of low sediment loads on these surfaces. Overall, E. stictus may be responding to sediment loads rather than manipulating them; it is a passenger rather than a driver in reef processes.
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Affiliation(s)
- Casey L Bowden
- Research Hub for Coral Reef Ecosystem Functions, College of Science and Engineering and ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia.
| | - Robert P Streit
- Research Hub for Coral Reef Ecosystem Functions, College of Science and Engineering and ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia
| | - David R Bellwood
- Research Hub for Coral Reef Ecosystem Functions, College of Science and Engineering and ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia
| | - Sterling B Tebbett
- Research Hub for Coral Reef Ecosystem Functions, College of Science and Engineering and ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia
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Simon G, Tóth D, Heckmann V, Poór VS. Application of 3D printing in assessment and demonstration of stab injuries. Int J Legal Med 2022. [PMID: 35657431 DOI: 10.1007/s00414-022-02846-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/23/2022] [Indexed: 11/17/2022]
Abstract
In stabbing related fatalities, the forensic pathologist has to assess the direction of wound track (thus, the direction of the stabbing) and the weapon’s possible characteristics by examining the stab wound. The determination of these characteristics can be made only with a high level of uncertainty, and the precise direction of the stabbing is often difficult to assess if only soft tissues are injured. Previously reported techniques used for the assessment of these wound characteristics have substantial limitations. This manuscript presents a method using today’s easily accessible three-dimensional (3D) printing technology for blade-wound comparison and wound track determination. Scanning and 3D printing of knives is a useful method to identify weapons and determine the precise stabbing direction in a stabbing incident without compromising the trace evidence or the autopsy results. Ballistic gel experiment, and dynamic stabbing test experiments prove the method can be applied in safety, without compromising the autopsy results. Identification of the exact knife is not possible with complete certainty but excluding certain knives will decrease the number of necessary DNA examinations, hence it can lower the burden on forensic genetic laboratories. The method addresses many of the shortcomings of previously used methods of probe insertion or post-mortem CT. Insertion of the printed knife into the wound gives a good visual demonstration of the stabbing direction, thus easing the forensic reconstruction of the stabbing incident. After combining the 3D printing with photogrammetry, the achieved 3D visualization is useful for courtroom demonstration and educational purposes.
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Shahkhosravi NA, Son J, Davies HMS, Komeili A. An investigation into different measurement techniques to assess equine proximal hoof circumference. J Equine Vet Sci 2022;:104028. [PMID: 35661772 DOI: 10.1016/j.jevs.2022.104028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 11/21/2022]
Abstract
Equine hoof conformation is integral to equine performance and soundness. Consequently, it is a major area of interest within the field of equine health. Researchers have measured several hoof shape parameters to study the hoof conformation. Proximal hoof circumference (PHC) is a primary hoof shape parameter, and its assessment may help to recognize the early stages of the development of changes in hoof morphology or poor hoof shape. Previous studies have mainly used a measuring tape to measure PHC. However, some doubts still exist regarding the reliability, repeatability and accuracy of measuring tape in this context. The current study conducted a technical comparison between the measuring tape and two alternative methods of 3D scanning and photogrammetry to measure PHC. Five equine limbs were collected from five adult horses, and the PHC of the limbs was measured using these three methods. The 3D scanner method was considered to be the highest accuracy and the reference for method comparisons. Pairwise correlations between the 3D scanner and the other two methods were conducted using a linear mixed model. The measuring tape and photogrammetry tended to overestimate the mean PHC compared to the 3D scanner by 0.96 mm (P > 0.05) and 2.2 mm (P < 0.05), respectively. In addition, an excellent interrater and intrarater correlation coefficient (ICC) index was reported for the reliability of the tape measurements. The variation of the tape measurements was +/-2 mm, which justified the use of measuring tape for PHC measurements in various clinical and horse management applications.
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Dussel N, Fuchs R, Reske AW, Neumuth T. Automated 3D thorax model generation using handheld video-footage. Int J Comput Assist Radiol Surg 2022. [PMID: 35357633 DOI: 10.1007/s11548-022-02593-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 03/04/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE For the visualization of pulmonary ventilation with Electrical Impedance Tomography (EIT) most devices use standard reconstruction models, featuring common thorax dimensions and predetermined electrode locations. Any discrepancies between the available model and the patient in terms of body shape and electrode position lead to incorrectly displayed impedance distributions. This work addresses that problem by presenting and evaluating a method for 3D model generation of the thorax and any affixed electrodes based on handheld video-footage. METHODS Therefore, a process was developed, providing users with the ability to capture a patient's chest and the attached electrodes via smartphone. Once data is collected, extracted images are used to generate a 3D model with a structure from motion approach and locate electrodes with ArUco markers. For the evaluation of the developed method, multiple tests were performed in laboratory environments, which were compared with manually created reference models and differences quantified based on mean distance, standard deviation, and maximum distance. RESULTS The implemented workflow allows for automated model reconstruction based on videos or selected images captured with a handheld device. It generates sparse point clouds from which a surface mesh is reconstructed and returns relative coordinates of any identified ArUco marker. The average value for the mean distance error of two model generations was 5.4 mm while the mean standard deviation was 6.0 mm. The average runtime of twelve reconstructions was 5:17 min, with a minimal runtime of 3:22 min and a maximal runtime of 7:29 min. CONCLUSION The presented methods and results show that model reconstruction of a patient's thorax and applied electrodes at an emergency site is feasible with already available devices. This is a first step toward the automated generation of patient-specific reconstruction models for Electrical Impedance Tomography based on images recorded with handheld devices.
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Hansson S, Östlund E, Bazargani F. The Vectra M3 3-dimensional digital stereo photogrammetry system: A reliable technique for detecting chin asymmetry. Imaging Sci Dent 2022; 52:43-51. [PMID: 35387095 PMCID: PMC8967496 DOI: 10.5624/isd.20210168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/03/2021] [Accepted: 10/11/2021] [Indexed: 12/02/2022] Open
Abstract
Purpose The aim of this study was to evaluate the reliability of the Vectra M3 (3D Imaging System; Canfield Scientific, Parsippany, NJ, USA) in detecting chin asymmetry, and to assess whether the automatic markerless tracking function is reliable compared to manually plotting landmarks. Materials and Methods Twenty subjects (18 females and 2 males) with a mean age of 42.5±10.5 years were included. Three-dimensional image acquisition was carried out on all subjects with simulated chin deviation in 4 stages (1-4 mm). The images were analyzed by 2 independent observers through manually plotting landmarks and by Vectra software auto-tracking mode. Repeated-measures analysis of variance and the Tukey post-hoc test were performed to evaluate the differences in mean measurements between the 2 operators and the software for measuring chin deviation in 4 stages. The intraclass correlation coefficient (ICC) was calculated to estimate the intra- and inter-examiner reliability. Results No significant difference was found between the accuracy of manually plotting landmarks between observers 1 and 2 and the auto-tracking mode (P=0.783 and P=0.999, respectively). The mean difference in detecting the degree of deviation according to the stage was <0.5 mm for all landmarks. Conclusion The auto-tracking mode could be considered as reliable as manually plotted landmarks in detecting small chin deviations with the Vectra® M3. The effect on the soft tissue when constructing a known dental movement yielded a small overestimation of the soft tissue movement compared to the dental movement (mean value<0.5 mm), which can be considered clinically non-significant.
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Affiliation(s)
- Stina Hansson
- Department of Orthodontics, Postgraduate Dental Education Center and School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Emil Östlund
- Department of Orthodontics, Postgraduate Dental Education Center and School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Farhan Bazargani
- Department of Orthodontics, Postgraduate Dental Education Center and School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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Bridger CA, Reich PD, Caraça Santos AM, Douglass MJJ. A dosimetric comparison of CT- and photogrammetry- generated 3D printed HDR brachytherapy surface applicators. Phys Eng Sci Med 2022; 45:125-134. [PMID: 35020174 DOI: 10.1007/s13246-021-01092-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/10/2021] [Indexed: 11/30/2022]
Abstract
In this study, we investigate whether an acceptable dosimetric plan can be obtained for a brachytherapy surface applicator designed using photogrammetry and compare the plan quality to a CT-derived applicator. The nose region of a RANDO anthropomorphic phantom was selected as the treatment site due to its high curvature. Photographs were captured using a Nikon D5600 DSLR camera and reconstructed using Agisoft Metashape while CT data was obtained using a Canon Aquillion scanner. Virtual surface applicators were designed in Blender and printed with PLA plastic. Treatment plans with a prescription dose of 3.85 Gy × 10 fractions with 100% dose to PTV on the bridge of the nose at 2 mm depth were generated separately using AcurosBV in the Varian BrachyVision TPS. PTV D98%, D90% and V100%, and OAR D0.1cc, D2cc and V50% dose metrics and dwell times were evaluated, with the applicator fit assessed by air-gap volume measurements. Both types of surface applicators were printed with minimal defects and visually fitted well to the target area. The measured air-gap volume between the photogrammetry applicator and phantom surface was 44% larger than the CT-designed applicator, with a mean air gap thickness of 3.24 and 2.88 mm, respectively. The largest difference in the dose metric observed for the PTV and OAR was the PTV V100% of - 1.27% and skin D0.1cc of - 0.28%. PTV D98% and D90% and OAR D2cc and V50% for the photogrammetry based plan were all within 0.5% of the CT based plan. Total dwell times were also within 5%. A 3D printed surface applicator for the nose was successfully constructed using photogrammetry techniques. Although it produced a larger air gap between the surface applicator and phantom surface, a clinically acceptable dose plan was created with similar PTV and OAR dose metrics to the CT-designed applicator. Additional future work is required to comprehensively evaluate its suitability in a clinically environment.
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Affiliation(s)
- Corey A Bridger
- School of Physical Sciences, The University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia. .,Department of Medical Physics, Radiation Oncology, Royal Adelaide Hospital, Port Road, Adelaide, SA, 5000, Australia.
| | - Paul D Reich
- School of Physical Sciences, The University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia.,Department of Medical Physics, Radiation Oncology, Royal Adelaide Hospital, Port Road, Adelaide, SA, 5000, Australia
| | - Alexandre M Caraça Santos
- School of Physical Sciences, The University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia.,Department of Medical Physics, Radiation Oncology, Royal Adelaide Hospital, Port Road, Adelaide, SA, 5000, Australia
| | - Michael J J Douglass
- School of Physical Sciences, The University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia.,Department of Medical Physics, Radiation Oncology, Royal Adelaide Hospital, Port Road, Adelaide, SA, 5000, Australia
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Lo CF, Nielsen KA, Ashe E, Bain DE, Mendez-Bye A, Reiss SA, Bogaard LT, Collins MS, Williams R. Measuring speed of vessels operating around endangered southern resident killer whales (Orcinus orca) in Salish Sea critical habitat. Mar Pollut Bull 2022; 174:113301. [PMID: 35090284 DOI: 10.1016/j.marpolbul.2021.113301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 11/02/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Motorized vessels are a major source of anthropogenic noise and can have adverse effects on species relying on sound for communication and feeding. Monitoring noise levels received by endangered southern resident killer whales (SRKWs) requires knowing the number, distance, and speed of surrounding vessels, including small boats that do not have Automatic Identification Systems (AIS). A method for estimating their speed is required to predict received noise levels and compliance with vessel regulations. We compared theodolite and photogrammetry methods to estimate the number, distance, and speed of vessels in SRKW Salish Sea summertime critical habitat. By treating AIS as "truth", we found photogrammetry-derived ranges and speeds were more variable than theodolite estimates. Error in photogrammetry-derived speeds increased with range. Overall, we found time saved in the field using photogrammetry was more than offset by long analysis time. Theodolite data were relatively easy to collect, and produced accurate and precise results.
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Affiliation(s)
- Catherine F Lo
- Oceans Initiative, 117 E Louisa St #135, Seattle, WA 98102, USA.
| | | | - Erin Ashe
- Oceans Initiative, 117 E Louisa St #135, Seattle, WA 98102, USA; Oceans Research and Conservation Association / ORCA, Pearse Island Box 193 Alert Bay BC V0N 1A0 Canada
| | - David E Bain
- Orca Conservancy, P.O. Box 16628, Seattle, WA 98116, USA
| | | | | | - Laura T Bogaard
- Oceans Initiative, 117 E Louisa St #135, Seattle, WA 98102, USA
| | | | - Rob Williams
- Oceans Initiative, 117 E Louisa St #135, Seattle, WA 98102, USA; Oceans Research and Conservation Association / ORCA, Pearse Island Box 193 Alert Bay BC V0N 1A0 Canada
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Ma B, Yue X, Sun Y, Peng L, Geng W. Accuracy of photogrammetry, intraoral scanning, and conventional impression techniques for complete-arch implant rehabilitation: an in vitro comparative study. BMC Oral Health 2021; 21:636. [PMID: 34893053 PMCID: PMC8665494 DOI: 10.1186/s12903-021-02005-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/01/2021] [Indexed: 12/05/2022] Open
Abstract
Background To compare the accuracy of photogrammetry, intraoral scanning and conventional impression techniques for complete-arch implant rehabilitation. Methods A master cast containing 6 implant abutment replicas was fabricated. Group PG: digital impressions were taken 10 times using a photogrammetry system; Group IOS: intraoral scanning was performed to fabricate 10 digital impressions; Group CNV: splinted open-tray impression technique was used to fabricate 10 definitive casts. The master cast and conventional definitive casts were digitized with a laboratory reference scanner. For all STL files obtained, scan bodies were converted to implant abutment replicas using a digital library. The accuracy of a digitizer was defined by 2 main parameters, trueness and precision. "Trueness" was used to describe the deviation between test files and reference file, and "precision" was used to describe the closeness between test files. Then, the trueness and precision of three impression techniques were evaluated and statistically compared (α = 0.05). Results The median trueness was 24.45, 43.45 and 28.70 μm for group PG, IOS and CNV; Group PG gave more accurate trueness than group IOS (P < 0.001) and group CNV (P = 0.033), group CNV showed more accurate trueness than group IOS (P = 0.033). The median precision was 2.00, 36.00 and 29.40 μm for group PG, IOS and CNV; Group PG gave more accurate precision than group IOS (P < 0.001) and group CNV (P < 0.001), group CNV showed more accurate precision than IOS (P = 0.002). Conclusions For complete-arch implant rehabilitation, the photogrammetry system showed the best accuracy of all the impression techniques evaluated, followed by the conventional impression technique, and the intraoral scanner provided the least accuracy.
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Affiliation(s)
- Bowen Ma
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, No. 4 Tian Tan Xi Li, Dongcheng District, Beijing, 100050, People's Republic of China
| | - Xinxin Yue
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, No. 4 Tian Tan Xi Li, Dongcheng District, Beijing, 100050, People's Republic of China
| | - Yujie Sun
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, No. 4 Tian Tan Xi Li, Dongcheng District, Beijing, 100050, People's Republic of China
| | - Lingyan Peng
- Department of Prosthodontics, Beijing Citident Stomatology Hospital, No. 109 North Xidan Street, Xicheng District, Beijing, 100032, People's Republic of China
| | - Wei Geng
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, No. 4 Tian Tan Xi Li, Dongcheng District, Beijing, 100050, People's Republic of China.
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