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Morgenstern J, Kreusch T, Golde J, Steuer S, Ossmann S, Kirsten L, Walther J, Zahnert T, Koch E, Neudert M. In Vivo Thickness of the Healthy Tympanic Membrane Determined by Optical Coherence Tomography. Otol Neurotol 2024; 45:e256-e262. [PMID: 38361307 DOI: 10.1097/mao.0000000000004132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
OBJECTIVE Tympanic membrane (TM) thickness is an important parameter for differentiation between a healthy and a pathologic TM. Furthermore, it is needed for modeling the middle ear function. Endoscopic optical coherence tomography (eOCT) provides the opportunity to measure the TM thickness of the entire TM in vivo. MATERIALS AND METHODS A total of 27 healthy ears were examined by eOCT. The system uses a light source with a central wavelength of 1,300 nm. The endoscope with an outer diameter of 3.5 mm provides a field of view of 10 mm and a working distance of 10 mm. Thickness measurements were carried out at 8 points on the TM. Additionally, the existing literature was analyzed, and a mean TM thickness value was determined. RESULTS The mean thickness of the TM over all measurement points of the pars tensa was 120.2 μm, and the pars flaccida was significantly thicker with a mean thickness of 177.9 μm. Beyond that, there were no significant differences between the single quadrants. The mean TM thickness in the literature was 88.8 μm. DISCUSSION EOCT provides the possibility for in vivo thickness determination of the TM. The mean thickness seems to be higher than in the previous studies, which were mostly carried out ex vivo. Our study takes the three-dimensional refraction into account and provides a method for the refraction correction.
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Affiliation(s)
- Joseph Morgenstern
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Theodor Kreusch
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | | | - Svea Steuer
- Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Steffen Ossmann
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | | | - Julia Walther
- Department of Medical Physics and Biomedical Engineering, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Thomas Zahnert
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Edmund Koch
- Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Marcus Neudert
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
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Liu P, Steuer S, Golde J, Morgenstern J, Hu Y, Schieffer C, Ossmann S, Kirsten L, Bodenstedt S, Pfeiffer M, Speidel S, Koch E, Neudert M. The Dresden in vivo OCT dataset for automatic middle ear segmentation. Sci Data 2024; 11:242. [PMID: 38409278 DOI: 10.1038/s41597-024-03000-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 01/25/2024] [Indexed: 02/28/2024] Open
Abstract
Endoscopic optical coherence tomography (OCT) offers a non-invasive approach to perform the morphological and functional assessment of the middle ear in vivo. However, interpreting such OCT images is challenging and time-consuming due to the shadowing of preceding structures. Deep neural networks have emerged as a promising tool to enhance this process in multiple aspects, including segmentation, classification, and registration. Nevertheless, the scarcity of annotated datasets of OCT middle ear images poses a significant hurdle to the performance of neural networks. We introduce the Dresden in vivo OCT Dataset of the Middle Ear (DIOME) featuring 43 OCT volumes from both healthy and pathological middle ears of 29 subjects. DIOME provides semantic segmentations of five crucial anatomical structures (tympanic membrane, malleus, incus, stapes and promontory), and sparse landmarks delineating the salient features of the structures. The availability of these data facilitates the training and evaluation of algorithms regarding various analysis tasks with middle ear OCT images, e.g. diagnostics.
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Affiliation(s)
- Peng Liu
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Faculty of Medicine, 01307, Dresden, Germany.
- Department of Translational Surgical Oncology, National Center for Tumor Diseases (NCT/UCC Dresden), German Cancer Research Center (DKFZ), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01307, Dresden, Germany.
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany.
| | - Svea Steuer
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany
- Clinical Sensoring and Monitoring, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Jonas Golde
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany
- Clinical Sensoring and Monitoring, TUD Dresden University of Technology, 01307, Dresden, Germany
- Medical Physics and Biomedical Engineering, TUD Dresden University of Technology, 01307, Dresden, Germany
- Fraunhofer Institute for Material and Beam Technology IWS, 01277, Dresden, Germany
| | - Joseph Morgenstern
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Faculty of Medicine, 01307, Dresden, Germany
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany
- Ear Research Center Dresden, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Yujia Hu
- Department of Translational Surgical Oncology, National Center for Tumor Diseases (NCT/UCC Dresden), German Cancer Research Center (DKFZ), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01307, Dresden, Germany
| | - Catherina Schieffer
- Ear Research Center Dresden, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Steffen Ossmann
- Ear Research Center Dresden, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Lars Kirsten
- Clinical Sensoring and Monitoring, TUD Dresden University of Technology, 01307, Dresden, Germany
- Medical Physics and Biomedical Engineering, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Sebastian Bodenstedt
- Department of Translational Surgical Oncology, National Center for Tumor Diseases (NCT/UCC Dresden), German Cancer Research Center (DKFZ), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01307, Dresden, Germany
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Micha Pfeiffer
- Department of Translational Surgical Oncology, National Center for Tumor Diseases (NCT/UCC Dresden), German Cancer Research Center (DKFZ), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01307, Dresden, Germany
| | - Stefanie Speidel
- Department of Translational Surgical Oncology, National Center for Tumor Diseases (NCT/UCC Dresden), German Cancer Research Center (DKFZ), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01307, Dresden, Germany
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Edmund Koch
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany
- Clinical Sensoring and Monitoring, TUD Dresden University of Technology, 01307, Dresden, Germany
| | - Marcus Neudert
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Faculty of Medicine, 01307, Dresden, Germany.
- Else Kröner Fresenius Center, TUD Dresden University of Technology, 01307, Dresden, Germany.
- Ear Research Center Dresden, TUD Dresden University of Technology, 01307, Dresden, Germany.
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Hund SMM, Golde J, Tetschke F, Basche S, Meier M, Kirsten L, Koch E, Hannig C, Walther J. Polarization-Sensitive Optical Coherence Tomography for Monitoring De- and Remineralization of Bovine Enamel In Vitro. Diagnostics (Basel) 2024; 14:367. [PMID: 38396406 PMCID: PMC10888132 DOI: 10.3390/diagnostics14040367] [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: 12/23/2023] [Revised: 01/25/2024] [Accepted: 02/05/2024] [Indexed: 02/25/2024] Open
Abstract
Early caries diagnosis still challenges dentistry. Polarization-sensitive optical coherence tomography (PS-OCT) is promising to detect initial lesions non-invasively in depth-resolved cross-sectional visualization. PS-OCT with determined degree of polarization (DOP) imaging provides an intuitive demineralization contrast. The aim of this study is to evaluate the suitability of DOP-based PS-OCT imaging to monitor controlled de- and remineralization progression for the first time and to introduce it as a valid, non-destructive in vitro detection method. Twelve standardized bovine enamel specimens were divided in different groups and demineralized with hydrochloric acid (HCl) as well as partly remineralized with fluoride over a 14-day pH-cycling experiment. The specimens were stored in artificial saliva and sodium chloride (NaCl), respectively. Progress measurements with PS-OCT were made with polarization-sensitive en faceand B-scan mode for qualitative evaluation. The specimens demineralized in HCl showed the most pronounced surface change (lowest DOP) and the most significant increase in depolarization. Additional fluoride treatment and the storage in artificial saliva resulted in the opposite (highest DOP). Therefore, DOP-based PS-OCT imaging appears to be a valuable technique for visualization and monitoring of enamel demineralization and remineralization processes in vitro. However, these findings need to be confirmed in human teeth ex vivo or in situ.
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Affiliation(s)
- Stella M M Hund
- Department of Medical Physics and Biomedical Engineering, Faculty Carl Gustav Carus of Medicine, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
- Polyclinic of Operative Dentistry, Periodontology and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Jonas Golde
- Department of Medical Physics and Biomedical Engineering, Faculty Carl Gustav Carus of Medicine, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Florian Tetschke
- Polyclinic of Operative Dentistry, Periodontology and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Sabine Basche
- Polyclinic of Operative Dentistry, Periodontology and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Melina Meier
- Polyclinic of Operative Dentistry, Periodontology and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Lars Kirsten
- Department of Medical Physics and Biomedical Engineering, Faculty Carl Gustav Carus of Medicine, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Edmund Koch
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Christian Hannig
- Polyclinic of Operative Dentistry, Periodontology and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Julia Walther
- Department of Medical Physics and Biomedical Engineering, Faculty Carl Gustav Carus of Medicine, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany
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Liu P, Golde J, Morgenstern J, Bodenstedt S, Li C, Hu Y, Chen Z, Koch E, Neudert M, Speidel S. Non-rigid point cloud registration for middle ear diagnostics with endoscopic optical coherence tomography. Int J Comput Assist Radiol Surg 2024; 19:139-145. [PMID: 37328716 PMCID: PMC10769937 DOI: 10.1007/s11548-023-02960-9] [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: 03/06/2023] [Accepted: 05/12/2023] [Indexed: 06/18/2023]
Abstract
PURPOSE Middle ear infection is the most prevalent inflammatory disease, especially among the pediatric population. Current diagnostic methods are subjective and depend on visual cues from an otoscope, which is limited for otologists to identify pathology. To address this shortcoming, endoscopic optical coherence tomography (OCT) provides both morphological and functional in vivo measurements of the middle ear. However, due to the shadow of prior structures, interpretation of OCT images is challenging and time-consuming. To facilitate fast diagnosis and measurement, improvement in the readability of OCT data is achieved by merging morphological knowledge from ex vivo middle ear models with OCT volumetric data, so that OCT applications can be further promoted in daily clinical settings. METHODS We propose C2P-Net: a two-staged non-rigid registration pipeline for complete to partial point clouds, which are sampled from ex vivo and in vivo OCT models, respectively. To overcome the lack of labeled training data, a fast and effective generation pipeline in Blender3D is designed to simulate middle ear shapes and extract in vivo noisy and partial point clouds. RESULTS We evaluate the performance of C2P-Net through experiments on both synthetic and real OCT datasets. The results demonstrate that C2P-Net is generalized to unseen middle ear point clouds and capable of handling realistic noise and incompleteness in synthetic and real OCT data. CONCLUSIONS In this work, we aim to enable diagnosis of middle ear structures with the assistance of OCT images. We propose C2P-Net: a two-staged non-rigid registration pipeline for point clouds to support the interpretation of in vivo noisy and partial OCT images for the first time. Code is available at: https://gitlab.com/nct_tso_public/c2p-net.
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Affiliation(s)
- Peng Liu
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany.
- Else Kröner Fresenius Center, TU Dresden, Dresden, 01307, Germany.
| | - Jonas Golde
- Clinical Sensoring and Monitoring, TU Dresden, Dresden, 01307, Germany
- Else Kröner Fresenius Center, TU Dresden, Dresden, 01307, Germany
| | - Joseph Morgenstern
- Else Kröner Fresenius Center, TU Dresden, Dresden, 01307, Germany
- Ear Research Center Dresden, TU Dresden, Dresden, 01307, Germany
| | - Sebastian Bodenstedt
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
| | - Chenpan Li
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
| | - Yujia Hu
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
| | - Zhaoyu Chen
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
| | - Edmund Koch
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
- Clinical Sensoring and Monitoring, TU Dresden, Dresden, 01307, Germany
| | - Marcus Neudert
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
- Ear Research Center Dresden, TU Dresden, Dresden, 01307, Germany
| | - Stefanie Speidel
- Translational Surgical Oncology, National Center for Tumor Diseases, Dresden, 01307, Germany
- Else Kröner Fresenius Center, TU Dresden, Dresden, 01307, Germany
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Steuer S, Morgenstern J, Kirsten L, Bornitz M, Neudert M, Koch E, Golde J. In vivo microstructural investigation of the human tympanic membrane by endoscopic polarization-sensitive optical coherence tomography. J Biomed Opt 2023; 28:121203. [PMID: 37007626 PMCID: PMC10050973 DOI: 10.1117/1.jbo.28.12.121203] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/27/2023] [Indexed: 06/19/2023]
Abstract
SIGNIFICANCE Endoscopic optical coherence tomography (OCT) is of growing interest for in vivo diagnostics of the tympanic membrane (TM) and the middle ear but generally lacks a tissue-specific contrast. AIM To assess the collagen fiber layer within the in vivo TM, an endoscopic imaging method utilizing the polarization changes induced by the birefringent connective tissue was developed. APPROACH An endoscopic swept-source OCT setup was redesigned and extended by a polarization-diverse balanced detection unit. Polarization-sensitive OCT (PS-OCT) data were visualized by a differential Stokes-based processing and the derived local retardation. The left and right ears of a healthy volunteer were examined. RESULTS Distinct retardation signals in the annulus region of the TM and near the umbo revealed the layered structure of the TM. Due to the TM's conical shape and orientation in the ear canal, high incident angles onto the TM's surface, and low thicknesses compared to the axial resolution limit of the system, other regions of the TM were more difficult to evaluate. CONCLUSIONS The use of endoscopic PS-OCT is feasible to differentiate birefringent and nonbirefringent tissue of the human TM in vivo. Further investigations on healthy as well as pathologically altered TMs are required to validate the diagnostic potential of this technique.
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Affiliation(s)
- Svea Steuer
- TU Dresden, Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Dresden, Germany
- TU Dresden, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Dresden, Germany
| | - Joseph Morgenstern
- TU Dresden, Otorhinolaryngology, Ear Research Center Dresden, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
| | - Lars Kirsten
- TU Dresden, Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Dresden, Germany
| | - Matthias Bornitz
- TU Dresden, Otorhinolaryngology, Ear Research Center Dresden, Faculty of Medicine, Dresden, Germany
| | - Marcus Neudert
- TU Dresden, Otorhinolaryngology, Ear Research Center Dresden, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
| | - Edmund Koch
- TU Dresden, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
| | - Jonas Golde
- TU Dresden, Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
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Gruda Y, Albrecht M, Buckova M, Haim D, Lauer G, Koch E, Joehrens K, Schnabel C, Golde J, Li J, McLaughlin RA, Walther J. Characteristics of Clinically Classified Oral Lichen Planus in Optical Coherence Tomography: A Descriptive Case-Series Study. Diagnostics (Basel) 2023; 13:2642. [PMID: 37627901 PMCID: PMC10453426 DOI: 10.3390/diagnostics13162642] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 08/27/2023] Open
Abstract
Malignant transformation of oral lichen planus (OLP) into oral squamous cell carcinoma is considered as one of the most serious complications of OLP. For the early detection of oral cancer in OLP follow-up, accurate localization of the OLP center is still difficult but often required for confirmatory biopsy with histopathological examination. Optical coherence tomography (OCT) offers the potential for more reliable biopsy sampling in the oral cavity as it is capable of non-invasively imaging the degenerated oral layer structure. In this case-series study with 15 patients, features of clinically classified forms of OLP in OCT cross-sections were registered and correlated with available histologic sections. Besides patients with reticular, atrophic, erosive and plaque-like OLP, two patients with leukoplakia were included for differentiation. The results show that OCT yields information about the epithelial surface, thickness and reflectivity, as well as the identifiability of the basement membrane and the vessel network, which could be used to complement the visual clinical appearance of OLP variants and allow a more accurate localization of the OLP center. This forms the basis for further studies on OCT-assisted non-invasive clinical classification of OLP, with the aim of enabling decision support for biopsy sampling in the future.
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Affiliation(s)
- Yuliia Gruda
- Carl Gustav Carus Faculty of Medicine, Department of Medical Physics and Biomedical Engineering, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (Y.G.); (M.A.); (C.S.); (J.G.)
| | - Marius Albrecht
- Carl Gustav Carus Faculty of Medicine, Department of Medical Physics and Biomedical Engineering, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (Y.G.); (M.A.); (C.S.); (J.G.)
- Carl Gustav Carus Faculty of Medicine, Institute of Pathology, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany;
| | - Michaela Buckova
- Carl Gustav Carus Faculty of Medicine, Clinic and Policlinic of Oral- and Maxillofacial Surgery, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (M.B.); (D.H.); (G.L.)
| | - Dominik Haim
- Carl Gustav Carus Faculty of Medicine, Clinic and Policlinic of Oral- and Maxillofacial Surgery, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (M.B.); (D.H.); (G.L.)
| | - Guenter Lauer
- Carl Gustav Carus Faculty of Medicine, Clinic and Policlinic of Oral- and Maxillofacial Surgery, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (M.B.); (D.H.); (G.L.)
| | - Edmund Koch
- Carl Gustav Carus Faculty of Medicine, Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany;
| | - Korinna Joehrens
- Carl Gustav Carus Faculty of Medicine, Institute of Pathology, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany;
| | - Christian Schnabel
- Carl Gustav Carus Faculty of Medicine, Department of Medical Physics and Biomedical Engineering, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (Y.G.); (M.A.); (C.S.); (J.G.)
- Carl Gustav Carus Faculty of Medicine, Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany;
| | - Jonas Golde
- Carl Gustav Carus Faculty of Medicine, Department of Medical Physics and Biomedical Engineering, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (Y.G.); (M.A.); (C.S.); (J.G.)
| | - Jiawen Li
- Faculty of Sciences, Engineering and Technology, The University of Adelaide, Adelaide 5005, Australia;
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide 5005, Australia;
| | - Robert A. McLaughlin
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide 5005, Australia;
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide 5005, Australia
| | - Julia Walther
- Carl Gustav Carus Faculty of Medicine, Department of Medical Physics and Biomedical Engineering, TU Dresden, Fetscherstraße 74, 01307 Dresden, Germany; (Y.G.); (M.A.); (C.S.); (J.G.)
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Bandzeviciute R, Steiner G, Liedel K, Golde J, Koch E, Welsch T, Kahlert C, Stange DE, Distler M, Weitz J, Ceponkus J, Sablinskas V, Teske C. Fast and label-free intraoperative discrimination of malignant pancreatic tissue by attenuated total reflection infrared spectroscopy. J Biomed Opt 2023; 28:045004. [PMID: 37122477 PMCID: PMC10142231 DOI: 10.1117/1.jbo.28.4.045004] [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] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 05/03/2023]
Abstract
Significance Pancreatic surgery is a highly demanding and routinely applied procedure for the treatment of several pancreatic lesions. The outcome of patients with malignant entities crucially depends on the margin resection status of the tumor. Frozen section analysis for intraoperative evaluation of tissue is still time consuming and laborious. Aim We describe the application of fiber-based attenuated total reflection infrared (ATR IR) spectroscopy for label-free discrimination of normal pancreatic, tumorous, and pancreatitis tissue. A pilot study for the intraoperative application was performed. Approach The method was applied for unprocessed freshly resected tissue samples of 58 patients, and a classification model for differentiating between the distinct tissue classes was established. Results The developed three-class classification model for tissue spectra allows for the delineation of tumors from normal and pancreatitis tissues using a probability score for class assignment. Subsequently, the method was translated into intraoperative application. Fiber optic ATR IR spectra were obtained from freshly resected pancreatic tissue directly in the operating room. Conclusion Our study shows the possibility of applying fiber-based ATR IR spectroscopy in combination with a supervised classification model for rapid pancreatic tissue identification with a high potential for transfer into intraoperative surgical diagnostics.
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Affiliation(s)
- Rimante Bandzeviciute
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius, Lithuania
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Gerald Steiner
- Department of Anaesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Katja Liedel
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT/UCC), Dresden, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Jonas Golde
- Department of Anaesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Edmund Koch
- Department of Anaesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Thilo Welsch
- Department of General, Visceral und Thoracic Surgery, St. Elisabethen-Klinikum Ravensburg, Academic Teaching Hospital of the University of Ulm, Ravensburg, Germany
| | - Christoph Kahlert
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT/UCC), Dresden, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Daniel E. Stange
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT/UCC), Dresden, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Marius Distler
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT/UCC), Dresden, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Jürgen Weitz
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT/UCC), Dresden, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Justinas Ceponkus
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius, Lithuania
| | - Valdas Sablinskas
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, Vilnius, Lithuania
| | - Christian Teske
- Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT/UCC), Dresden, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
- Address all correspondence to Christian Teske,
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8
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Melcher S, Zimmerer C, Galli R, Golde J, Herber R, Raiskup F, Koch E, Steiner G. Analysis of riboflavin/ultraviolet a corneal cross-linking by molecular spectroscopy. Heliyon 2023; 9:e13206. [PMID: 36747519 PMCID: PMC9898066 DOI: 10.1016/j.heliyon.2023.e13206] [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: 05/25/2022] [Revised: 01/19/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Corneal cross-linking (CXL) with riboflavin and ultraviolet A light is a therapeutic procedure to restore the mechanical stability of corneal tissue. The treatment method is applied to pathological tissue, such as keratoconus and induces the formation of new cross-links. At present, the molecular mechanisms of induced cross-linking are still not known exactly. In this study, we investigated molecular alterations within porcine cornea tissue after treatment with riboflavin and ultraviolet A light by surface enhanced Raman spectroscopy (SERS). For that purpose, after CXL treatment a thin silver layer was vapor-deposited onto cornea flaps. To explore molecular alterations induced by the photochemical process hierarchical cluster analysis (HCA) was used. The detailed analysis of SERS spectra reveals that there is no general change in collagen secondary structure while modifications on amino acid side chains are the most dominant outcome. The formation of secondary and aromatic amine groups as well as methylene and carbonyl groups were observed. Even though successful cross-linking could not be registered in all treated samples, Raman signals of newly formed chemical groups are already present in riboflavin only treated corneas.
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Affiliation(s)
- Steven Melcher
- Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany,Corresponding author.
| | - Cordelia Zimmerer
- Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany
| | - Roberta Galli
- Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Jonas Golde
- Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Robert Herber
- Department of Ophthalmology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Frederik Raiskup
- Department of Ophthalmology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Edmund Koch
- Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Gerald Steiner
- Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
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9
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Rix J, Rüsing M, Galli R, Golde J, Reitzig S, Eng LM, Koch E. Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3. Opt Express 2022; 30:5051-5062. [PMID: 35209476 DOI: 10.1364/oe.447554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
Recently, ferroelectric domain walls (DWs) have attracted considerable attention due to their intrinsic topological effects and their huge potential for optoelectronic applications. In contrast, many of the underlying physical properties and phenomena are not well characterized. In this regard, analyzing the vibrational properties, e.g. by Raman spectroscopy, provides direct access to the various local material properties, such as strains, defects or electric fields. While the optical phonon spectra of DWs have been widely investigated in the past, no reports on the acoustic phonon properties of DWs exist. In this work, we present a joint Raman and Brillouin visualization of ferroelectric DWs in the model ferroelectric lithium niobate. This is possible by using a combined Raman and virtually imaged phased array Brillouin setup. Here, we show that DWs can be visualized via frequency shifts observed in the acoustic phonons, as well. The observed contrast then is qualitatively explained by models adapted from Raman spectroscopy. This work, hence, provides a novel route to study ferroelectric DWs and their intrinsic mechanical properties.
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10
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Walther J, Golde J, Albrecht M, Quirk BC, Scolaro L, Kirk RW, Gruda Y, Schnabel C, Tetschke F, Joehrens K, Haim D, Buckova M, Li J, McLaughlin RA. A handheld fiber-optic probe to enable optical coherence tomography of oral soft tissue. IEEE Trans Biomed Eng 2022; 69:2276-2282. [PMID: 34995178 DOI: 10.1109/tbme.2022.3141241] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This study presents a highly miniaturized, handheld probe developed for rapid assessment of soft tissue using optical coherence tomography (OCT). OCT is a non-invasive optical technology capable of visualizing the sub-surface structural changes that occur in soft tissue disease such as oral lichen planus. However, usage of OCT in the oral cavity has been limited, as the requirements for high-quality optical scanning have often resulted in probes that are heavy, unwieldy and clinically impractical. In this paper, we present a novel probe that combines an all-fiber optical design with a light-weight magnetic scanning mechanism to provide easy access to the oral cavity. The resulting probe is approximately the size of a pen (10 mm 140 mm) and weighs only 10 grams. To demonstrate the feasibility and high image quality achieved with the probe, imaging is performed on the buccal mucosa and alveolar mucosa during routine clinical assessment of six patients diagnosed with oral lichen planus. Results show the loss of normal tissue structure within the lesion, and contrast this with the clear delineation of tissue layers in adjacent inconspicuous regions. The results also demonstrate the ability of the probe to acquire a three-dimensional data volume by manually sweeping across the surface of the mucosa. The findings of this study show the feasibility of using a small, lightweight probe to identify pathological features in oral soft tissue.
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11
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Kilian D, Cometta S, Bernhardt A, Taymour R, Golde J, Ahlfeld T, Emmermacher J, Gelinsky M, Lode A. Core-shell bioprinting as a strategy to apply differentiation factors in a spatially defined manner inside osteochondral tissue substitutes. Biofabrication 2021; 14. [PMID: 34933296 DOI: 10.1088/1758-5090/ac457b] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 09/17/2021] [Accepted: 12/21/2021] [Indexed: 11/12/2022]
Abstract
One of the key challenges in osteochondral tissue engineering is to define specified zones with varying material properties, cell types and biochemical factors supporting locally adjusted differentiation into the osteogenic and chondrogenic lineage, respectively. Herein, extrusion-based core-shell bioprinting is introduced as a potent tool allowing a spatially defined delivery of cell types and differentiation factors TGF-β3 and BMP-2 in separated compartments of hydrogel strands, and, therefore, a local supply of matching factors for chondrocytes and osteoblasts. Ink development was based on blends of alginate and methylcellulose, in combination with varying concentrations of the nanoclay Laponite whose high affinity binding capacity for various molecules was exploited. Release kinetics of model molecules was successfully tuned by Laponite addition. Core-shell bioprinting was proven to generate well-oriented compartments within one strand as monitored by optical coherence tomography in a non-invasive manner. Chondrocytes and osteoblasts were applied each in the shell while the respective differentiation factors (TGF-β3, BMP-2) were provided by a Laponite-supported core serving as central factor depot within the strand, allowing directed differentiation of cells in close contact to the core. Experiments with bi-zonal constructs, comprising an osteogenic and a chondrogenic zone, revealed that the local delivery of the factors from the core reduces effects of these factors on the cells in the other scaffold zone. These observations prove the general suitability of the suggested system for co-differentiation of different cell types within a zonal construct.
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Affiliation(s)
- David Kilian
- Centre for Translational Bone, Joint and Soft Tissue Research, Technische Universitaet Dresden, Fetscherstrasse 74, Dresden, 01307, GERMANY
| | - Silvia Cometta
- Dresden University of Technology, Fetscherstrasse 74, Dresden, Sachsen, 01307, GERMANY
| | - Anne Bernhardt
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine, Dresden University of Technology, Fetscherstrasse 74, Dresden, Sachsen, 01307, GERMANY
| | - Rania Taymour
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine, Dresden University of Technology, Fetscherstrasse 74, Dresden, Sachsen, 01307, GERMANY
| | - Jonas Golde
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Dresden University of Technology, Fetscherstrasse 74, Dresden, Sachsen, 01307, GERMANY
| | - Tilman Ahlfeld
- Centre for Translational Bone, Joint and Soft Tissue Research, Technische Universitaet Dresden, Fetscherstrasse 74, Dresden, 01307, GERMANY
| | - Julia Emmermacher
- Centre for translational bone, joint and soft tissue research, Technische Universitat Dresden, Fetscherstrasse 74, Dresden, 01307, GERMANY
| | - Michael Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, Technische Universitaet Dresden, Fetscherstr. 74, Dresden, 01307, GERMANY
| | - Anja Lode
- Centre for Translational Bone, Joint and Soft Tissue Research, Technische Universitaet Dresden, Fetscherstrasse 74, Dresden, 01307, GERMANY
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12
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Golde J, Rüsing M, Rix J, Eng LM, Koch E. Quantifying the refractive index of ferroelectric domain walls in periodically poled LiNbO 3 single crystals by polarization-sensitive optical coherence tomography. Opt Express 2021; 29:33615-33631. [PMID: 34809171 DOI: 10.1364/oe.432810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
Domain walls (DWs) in ferroelectric (FE) and multiferroic materials possess an ever-growing potential as integrated functional elements, for instance in optoelectronic nanodevices. Mandatory, however, is the profound knowledge of the local-scale electronic and optical properties, especially at DWs that are still incompletely characterized to date. Here, we quantify the refractive index of individual FE DWs in periodically-poled LiNbO3 (PPLN) single crystals. When applying polarization-sensitive optical coherence tomography (PS-OCT) at 1300 nm using circular light polarization, we are able to probe the relevant electro-optical properties close to and at the DWs, including also their ordinary and extraordinary contributions. When comparing to numerical calculations, we conclude that the DW signals recorded for ordinary and extraordinary polarization stem from an increased refractive index of at least Δn > 2·10-3 that originates from a tiny region of < 30 nm in width. PS-OCT hence provides an extremely valuable tool to decipher and quantify subtle changes of refractive index profiles for both inorganic and biomedical nanomaterial systems.
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13
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Albrecht M, Schnabel C, Mueller J, Golde J, Koch E, Walther J. In Vivo Endoscopic Optical Coherence Tomography of the Healthy Human Oral Mucosa: Qualitative and Quantitative Image Analysis. Diagnostics (Basel) 2020; 10:E827. [PMID: 33076312 PMCID: PMC7602587 DOI: 10.3390/diagnostics10100827] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/08/2020] [Accepted: 10/10/2020] [Indexed: 12/18/2022] Open
Abstract
To date, there is still a lack of reliable imaging modalities to improve the quality of consultation, diagnostic and medical examinations of the oral mucosa in dentistry. Even though, optical technologies have become an important element for the detection and treatment of different diseases of soft tissue, for the case of oral screenings the evidence of the benefit in comparison to conventional histopathology is mostly still pending. One promising optical technology for oral diagnostics is optical coherence tomography (OCT). To prove the potential of OCT, even the amount of freely accessible OCT data is not sufficient to describe the variance of healthy human oral soft tissue in vivo. In order to remedy this deficiency, the present study provides in vivo OCT cross sections of the human oral mucosa of the anterior and posterior oral cavity as well as the oropharynx of 47 adult volunteers. A collection of representative OCT cross sections forms the basis for a randomized blinded image analysis by means of seven criteria to assess the main features of the superficial layers of the human oral mucosa and to determine its correlation to regional features known from hematoxylin and eosin (HE) stained histology.
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Affiliation(s)
- Marius Albrecht
- Department of Medical Physics and Biomedical Engineering, Technische Universitaet Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (M.A.); (C.S.)
| | - Christian Schnabel
- Department of Medical Physics and Biomedical Engineering, Technische Universitaet Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (M.A.); (C.S.)
- Department of Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Clinical Sensoring and Monitoring, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (J.M.); (J.G.); (E.K.)
| | - Juliane Mueller
- Department of Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Clinical Sensoring and Monitoring, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (J.M.); (J.G.); (E.K.)
| | - Jonas Golde
- Department of Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Clinical Sensoring and Monitoring, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (J.M.); (J.G.); (E.K.)
| | - Edmund Koch
- Department of Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Clinical Sensoring and Monitoring, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (J.M.); (J.G.); (E.K.)
| | - Julia Walther
- Department of Medical Physics and Biomedical Engineering, Technische Universitaet Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany; (M.A.); (C.S.)
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14
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Golde J, Tetschke F, Vosahlo R, Kirsten L, Walther J, Hannig C, Koch E. Towards quantitative demineralization imaging for the assessment of carious lesions based on PS-OCT. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023804009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Assessing the stage and progression of enamel demineralization non-invasively is of high interest in conservative dentistry. By examining tooth samples with suspected occlusal lesions, we show the potential of depolarization imaging based on polarization-sensitive optical coherence tomography for the assessment of carious lesions and validate the results by co-registered X-ray micro-computed tomography volumes.
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15
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Steuer S, Golde J, Ossmann S, Kirsten L, Morgenstern J, Bornitz M, Neudert M, Koch E. Imaging birefringent tissue in the human tympanic membrane by polarization-sensitive optical coherence tomography. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023804008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Acousto-mechanical properties of the human tympanic membrane mainly depend on the connective tissue in its layered structure. Using polarization-sensitive optical coherence tomography, a depth-resolved imaging technique which provides additional tissue specific contrast, polarization changes of the birefringent layers in the human tympanic membrane were detected. By depicting estimated local retardances, distinguishing different tissue types was possible. This suggests the ability to image pathological alterations of the connective tissue with PSOCT, which extends the conventional diagnostic methods in middle ear surgery.
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16
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Golde J, Schnabel C, Filippatos A, Wollmann T, Gude M, Koch E. Non-destructive testing of a rotating glass-fibre-reinforced polymer disc by swept source optical coherence tomography. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023806007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Composite materials are used for high-performance rotating blades, e.g. in turbines and wind power plants. Here, optical coherence tomography was used to visualize large areas of fibre-reinforcedpolymer discs at rotation speeds of up to 1200 rpm. These measurements allowed to visualize the fibre structure over large areas of the disc. By recording the front and back reflex, the wobble of the disc was measured precisely. Additionally, the recorded structure was used to detect even small deviations from a uniform rotation.
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17
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Kirsten L, Schindler M, Morgenstern J, Erkkilä MT, Golde J, Walther J, Rottmann P, Kemper M, Bornitz M, Neudert M, Zahnert T, Koch E. Endoscopic optical coherence tomography with wide field-of-view for the morphological and functional assessment of the human tympanic membrane. J Biomed Opt 2018; 24:1-11. [PMID: 30516037 PMCID: PMC6975278 DOI: 10.1117/1.jbo.24.3.031017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 06/22/2018] [Accepted: 11/05/2018] [Indexed: 05/25/2023]
Abstract
An endoscopic optical coherence tomography (OCT) system with a wide field-of-view of 8 mm is presented, which combines the image capability of endoscopic imaging at the middle ear with the advantages of functional OCT imaging, allowing a morphological and functional assessment of the human tympanic membrane. The endoscopic tube has a diameter of 3.5 mm and contains gradient-index optics for simultaneous forward-viewing OCT and video endoscopy. The endoscope allows the three-dimensional visualization of nearly the entire tympanic membrane. In addition, the oscillation of the tympanic membrane is measured spatially resolved and in the frequency range between 500 Hz and 5 kHz with 125 Hz resolution, which is realized by phase-resolved Doppler OCT imaging during acoustical excitation with chirp signals. The applicability of the OCT system is demonstrated in vivo. Due to the fast image acquisition, structural and functional measurements are only slightly affected by motion artifacts.
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Affiliation(s)
- Lars Kirsten
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
| | - Martin Schindler
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
| | - Joseph Morgenstern
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Dresden, Germany
| | - Mikael Timo Erkkilä
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
| | - Jonas Golde
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
| | - Julia Walther
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Medical Physics and Biomedical Engineering, Dresden, Germany
| | - Pascal Rottmann
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
| | - Max Kemper
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Dresden, Germany
| | - Matthias Bornitz
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Dresden, Germany
| | - Marcus Neudert
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Dresden, Germany
| | - Thomas Zahnert
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Dresden, Germany
| | - Edmund Koch
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany
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18
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Schindler M, Kirsten L, Morgenstern J, Golde J, Erkkilä M, Walther J, Kemper M, Bornitz M, Neudert M, Zahnert T, Koch E. Imaging of the human tympanic membrane by endoscopic optical coherence tomography. Current Directions in Biomedical Engineering 2018. [DOI: 10.1515/cdbme-2018-0074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractEndoscopic optical coherence tomography is a non-invasive and contactless imaging technique based on white light interferometry. It enables high-resolution three-dimensional imaging of scattering tissue up to a depth of about 2 mm. In addition, Doppler-OCT can detect sub-resolution movements. These features can be used to examine the tympanic membrane, the surrounding tissue and nearby areas of the tympanic cavity. For this purpose, we present an endoscopic OCT system, which provides access to the tympanic membrane. The design of the endoscope is based on a gradientindex (GRIN) lens system. This allows a broad field of view and a large working distance. An additional VIS beam path allows visual imaging and orientation inside the auditory canal. Therefore, illumination fibers are attached a round the GRIN-system. The resulting endoscope has a length of 55 mm and a diameter of 3.5 mm. By attaching an earphone and a probe microphone, the oscillation of the tympanic membrane can be measured under acoustic stimulation. With the endoscopic OCT system, we provide an examination tool for the diagnosis of a broad number of diseases like conductive hearing loss.
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Affiliation(s)
- Martin Schindler
- 1TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Critical Care Medicin, Clinical Sensoring and Monitoring, Fetscherstr. 74, 01307Dresden, Germany
| | - Lars Kirsten
- 2TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Critical Care Medicin, Clinical Sensoring and Monitoring, 01307Dresden, Germany
| | - Joseph Morgenstern
- 3TU Dresden, Faculty of Medicine Carl Gustav Carus, Otorhinolaryngology, 01307Dresden, Germany
| | - Jonas Golde
- 2TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Critical Care Medicin, Clinical Sensoring and Monitoring, 01307Dresden, Germany
| | - Mikael Erkkilä
- 4Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, A-1090Vienna, Austria
| | - Julia Walther
- 5TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Critical Care Medicin, Clinical Sensoring and Monitoring/Medical Physics and Biomedical Engineering, 01307Dresden, Germany
| | - Max Kemper
- 3TU Dresden, Faculty of Medicine Carl Gustav Carus, Otorhinolaryngology, 01307Dresden, Germany
| | - Matthias Bornitz
- 3TU Dresden, Faculty of Medicine Carl Gustav Carus, Otorhinolaryngology, 01307Dresden, Germany
| | - Marcus Neudert
- 3TU Dresden, Faculty of Medicine Carl Gustav Carus, Otorhinolaryngology, 01307Dresden, Germany
| | - Thomas Zahnert
- 3TU Dresden, Faculty of Medicine Carl Gustav Carus, Otorhinolaryngology, 01307Dresden, Germany
| | - Edmund Koch
- 6TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Critical Care Medicin, Clinical Sensoring and Monitoring, 01307Dresden, Germany
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19
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Golde J, Tetschke F, Walther J, Rosenauer T, Hempel F, Hannig C, Koch E, Kirsten L. Cross-sectional and en-face depolarization imaging for the assessment of dental lesions. Current Directions in Biomedical Engineering 2018. [DOI: 10.1515/cdbme-2018-0073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Dental caries is one of the most widespread diseases and the early and non-invasive detection of carious lesions remains an ongoing topic in biomedical research. In contrast, optical coherence tomography (OCT) is an emerging, non-invasive imaging technique for near-surface structures, that has already proved its capability for manifold biomedical applications and can be extended by several modalities such as polarization sensitivity. We have recently shown that polarization sensitive OCT combined with an algorithm for depolarization imaging, visualizing the degree of polarization uniformity (DOPU), is a promising tool for the detection and assessment of carious lesions. In this paper, we evaluate different visualization approaches based on both the intensity and DOPU data with cross-sectional and en-face representations and discuss limitations and the potential of the proposed method for the assessment of dental lesions on the example of a molar tooth with a brown spot.
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Affiliation(s)
- Jonas Golde
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Fetscherstrasse 74, 01307 Dresden , Germany
| | - Florian Tetschke
- TU Dresden, Faculty of Medicine CGC, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Dresden , Germany
| | - Julia Walther
- TU Dresden, Faculty of Medicine CGC, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Dresden , Germany
| | - Tobias Rosenauer
- TU Dresden, Faculty of Medicine CGC, Policlinic of Operative and Pediatric Dentistry, Dresden , Germany
| | - Franz Hempel
- TU Dresden, Faculty of Medicine CGC, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Dresden , Germany
| | - Christian Hannig
- TU Dresden, Faculty of Medicine CGC, Policlinic of Operative and Pediatric Dentistry, Dresden , Germany
| | - Edmund Koch
- TU Dresden, Faculty of Medicine CGC, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Dresden , Germany
| | - Lars Kirsten
- TU Dresden, Faculty of Medicine CGC, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Dresden , Germany
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20
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Tetschke F, Golde J, Walther J, Kirsten L, Koch E, Hannig C, Rüger C, Schneider H, Haak R. Visualization of interfacial adhesive defects at dental restorations with spectral domain and polarization sensitive optical coherence tomography. Current Directions in Biomedical Engineering 2018. [DOI: 10.1515/cdbme-2018-0134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractRestoration loss based on interfacial adhesive defects and associated caries at the restoration margin are the main causes for invasive replacement of dental restorations. Assessment of the interfacial quality based on clinical inspection and radiographic examination is often difficult and not reliable. In this work, we present spectral domain optical coherence tomography (SDOCT) and polarization sensitive optical coherence tomography (PSOCT) for the evaluation of tooth-composite bond failure. Imaging of two composite restorations at the occlusal surface are presented using intensity-based images obtained by SDOCT and PSOCT based degree of polarization uniformity (DOPU). Both modalities revealed several defects beneath the surface such as inhomogeneous adhesive layers, marginal gaps and bubbles. In addition, DOPU representation showed an inhomogeneous structure within the composite material. OCT based imaging of dental restorations could add a valuable diagnostic tool for the evaluation of structural defects in clinical practice. The representation of polarization characteristics with the DOPU algorithm provides further information on the homogeneity of the restoration.
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Affiliation(s)
- Florian Tetschke
- 1TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,Dresden, Germany
| | - Jonas Golde
- 2TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring,Dresden, Germany
| | - Julia Walther
- 3TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring,Dresden, Germany
- 4TU Dresden, Faculty of Medicine Carl Gustav Carus, Department of Medical Physics and Biomedical Engineering,Dresden, Germany
| | - Lars Kirsten
- 2TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring,Dresden, Germany
| | - Edmund Koch
- 2TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring,Dresden, Germany
| | - Christian Hannig
- 1TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,Dresden, Germany
| | - Claudia Rüger
- 5University of Leipzig, Department of Cariology, Endodontology and Periodontology,Leipzig, Germany
| | - Hartmut Schneider
- 5University of Leipzig, Department of Cariology, Endodontology and Periodontology,Leipzig, Germany
| | - Rainer Haak
- 5University of Leipzig, Department of Cariology, Endodontology and Periodontology,Leipzig, Germany
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21
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Tetschke F, Kirsten L, Golde J, Walther J, Galli R, Koch E, Hannig C. Application of optical and spectroscopic technologies for the characterization of carious lesions in vitro. ACTA ACUST UNITED AC 2018; 63:595-602. [DOI: 10.1515/bmt-2017-0133] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 07/18/2018] [Indexed: 01/30/2023]
Abstract
Abstract
The detection of the beginning demineralization process of dental hard tissue remains a challenging task in dentistry. As an alternative to bitewing radiographs, optical and spectroscopic technologies showed promising results for caries diagnosis. The aim of the present work is to give an overview of optical and spectroscopic properties of healthy and carious human teeth in vitro by means of Raman spectroscopy (RS), optical coherence tomography (OCT) and hyperspectral imaging (HSI). OCT was able to represent microstructural changes below the enamel surface and revealed increased scattering for white spot lesions and a white scattering trail for deeper lesions. HSI showed similar absorbance characteristics for healthy and demineralized enamel over the entire spectrum and a characteristic absorbance peak at 550 nm for discolored lesions. Already at early carious stages (white spot), we found a distinct loss of hydroxylapatite-related intensity at 959 cm−1 in demineralized regions with RS. Healthy and demineralized tooth surfaces can be distinguished at different signal levels by means of RS, OCT and HSI. The presented modalities provide additional information to the current clinical diagnosis of caries such as microstructural changes, quantification of the demineralization and imaging of caries-related chemical changes.
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Affiliation(s)
- Florian Tetschke
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus , Clinic of Operative and Pediatric Dentistry , Dresden , Germany
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine , Clinical Sensoring and Monitoring , Dresden , Germany
| | - Lars Kirsten
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine , Clinical Sensoring and Monitoring , Dresden , Germany
| | - Jonas Golde
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine , Clinical Sensoring and Monitoring , Dresden , Germany
| | - Julia Walther
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine , Clinical Sensoring and Monitoring , Dresden , Germany
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Departement of Medical Physics and Biomedical Engineering , Dresden , Germany
| | - Roberta Galli
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine , Clinical Sensoring and Monitoring , Dresden , Germany
| | - Edmund Koch
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine , Clinical Sensoring and Monitoring , Dresden , Germany
| | - Christian Hannig
- Technische Universität Dresden , Faculty of Medicine Carl Gustav Carus , Clinic of Operative and Pediatric Dentistry , Dresden , Germany
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22
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Walther J, Schnabel C, Tetschke F, Rosenauer T, Golde J, Ebert N, Baumann M, Hannig C, Koch E. In vivo imaging in the oral cavity by endoscopic optical coherence tomography. J Biomed Opt 2018; 23:1-13. [PMID: 29500877 DOI: 10.1117/1.jbo.23.7.071207] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 08/10/2017] [Accepted: 01/11/2018] [Indexed: 05/20/2023]
Abstract
The common way to diagnose hard and soft tissue irregularities in the oral cavity is initially the visual inspection by an experienced dentist followed by further medical examinations, such as radiological imaging and/or histopathological investigation. For the diagnosis of oral hard and soft tissues, the detection of early transformations is mostly hampered by poor visual access, low specificity of the diagnosis techniques, and/or limited feasibility of frequent screenings. Therefore, optical noninvasive diagnosis of oral tissue is promising to improve the accuracy of oral screening. Considering this demand, a rigid handheld endoscopic scanner was developed for optical coherence tomography (OCT). The novelty is the usage of a commercially near-infrared endoscope with fitting optics in combination with an established spectral-domain OCT system of our workgroup. By reaching a high spatial resolution, in vivo images of anterior and especially posterior dental and mucosal tissues were obtained from the oral cavity of two volunteers. The convincing image quality of the endoscopic OCT device is particularly obvious for the imaging of different regions of the human soft palate with highly scattering fibrous layer and capillary network within the lamina propria.
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Affiliation(s)
- Julia Walther
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Department of Medical Physics and Biomedical Engi, Germany
| | - Christian Schnabel
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
| | - Florian Tetschke
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,, Germany
| | - Tobias Rosenauer
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,, Germany
| | - Jonas Golde
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
| | - Nadja Ebert
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Department of Radiotherapy and Radiooncology, Dre, Germany
- TU Dresden, Faculty of Medicine Carl Gustav Carus, OncoRay-National Center of Radiation Research in, Germany
| | - Michael Baumann
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Department of Radiotherapy and Radiooncology, Dre, Germany
- TU Dresden, Faculty of Medicine Carl Gustav Carus, OncoRay-National Center of Radiation Research in, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiooncology, Dresden, Germany
| | - Christian Hannig
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,, Germany
| | - Edmund Koch
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
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Golde J, Tetschke F, Walther J, Rosenauer T, Hempel F, Hannig C, Koch E, Kirsten L. Detection of carious lesions utilizing depolarization imaging by polarization sensitive optical coherence tomography. J Biomed Opt 2018; 23:1-8. [PMID: 29374403 DOI: 10.1117/1.jbo.23.7.071203] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 10/01/2017] [Accepted: 12/22/2017] [Indexed: 05/22/2023]
Abstract
As dental caries is one of the most common diseases, the early and noninvasive detection of carious lesions plays an important role in public health care. Optical coherence tomography (OCT) with its ability of depth-resolved, high-resolution, noninvasive, fast imaging has been previously recognized as a promising tool in dentistry. Additionally, polarization sensitive imaging provides quantitative measures on the birefringent tissue properties and can be utilized for imaging dental tissue, especially enamel and dentin. By imaging three exemplary tooth samples ex vivo with proximal white spot, brown spot, and cavity, we show that the combination of polarization sensitive OCT and the degree of polarization uniformity (DOPU) algorithm is a promising approach for the detection of proximal carious lesions due to the depolarization contrast of demineralized tissue. Furthermore, we investigate different sizes of the DOPU evaluation kernel on the resulting contrast and conclude a suitable value for this application. We propose that DOPU provides an easy to interpret image representation and appropriate contrast for possible future screening applications in early caries diagnostics.
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Affiliation(s)
- Jonas Golde
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive, Germany
| | - Florian Tetschke
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive, Germany
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and P, Germany
| | - Julia Walther
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive, Germany
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Department of Medical Physics, Germany
| | - Tobias Rosenauer
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and P, Germany
| | - Franz Hempel
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive, Germany
| | - Christian Hannig
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and P, Germany
| | - Edmund Koch
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive, Germany
| | - Lars Kirsten
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive, Germany
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24
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Walther J, Golde J, Kirsten L, Tetschke F, Hempel F, Rosenauer T, Hannig C, Koch E. In vivo imaging of human oral hard and soft tissues by polarization-sensitive optical coherence tomography. J Biomed Opt 2017; 22:1-17. [PMID: 29264891 DOI: 10.1117/1.jbo.22.12.121717] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 08/03/2017] [Accepted: 11/27/2017] [Indexed: 05/21/2023]
Abstract
Since optical coherence tomography (OCT) provides three-dimensional high-resolution images of biological tissue, the benefit of polarization contrast in the field of dentistry is highlighted in this study. Polarization-sensitive OCT (PS OCT) with phase-sensitive recording is used for imaging dental and mucosal tissues in the human oral cavity in vivo. An enhanced polarization contrast of oral structures is reached by analyzing the signals of the co- and crosspolarized channels of the swept source PS OCT system quantitatively with respect to reflectivity, retardation, optic axis orientation, and depolarization. The calculation of these polarization parameters enables a high tissue-specific contrast imaging for the detailed physical interpretation of human oral hard and soft tissues. For the proof-of-principle, imaging of composite restorations and mineralization defects at premolars as well as gingival, lingual, and labial oral mucosa was performed in vivo within the anterior oral cavity. The achieved contrast-enhanced results of the investigated human oral tissues by means of polarization-sensitive imaging are evaluated by the comparison with conventional intensity-based OCT.
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Affiliation(s)
- Julia Walther
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Department of Medical Physics and Biomedical Engi, Germany
| | - Jonas Golde
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
| | - Lars Kirsten
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
| | - Florian Tetschke
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,, Germany
| | - Franz Hempel
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
| | - Tobias Rosenauer
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,, Germany
| | - Christian Hannig
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry,, Germany
| | - Edmund Koch
- TU Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clini, Germany
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25
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Kirsten L, Morgenstern J, Erkkilä MT, Schindler M, Golde J, Walther J, Kemper M, Stoppe T, Bornitz M, Neudert M, Zahnert T, Koch E. Functional and morphological imaging of the human tympanic membrane with endoscopic optical coherence tomography. Current Directions in Biomedical Engineering 2017. [DOI: 10.1515/cdbme-2017-0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractIn this ex vivo feasibility study, endoscopic structural and functional optical coherence tomography (OCT) imaging with a field of view of 8 mm is presented allowing the inspection of nearly the entire tympanic membrane through the ear canal. The endoscope utilizes a gradient index optics for simultaneous OCT and video endoscopy. Additionally, Doppler-OCT allows the measurement of the tympanic membrane oscillation. Due to the fast image acquisition, only minor motion artifacts have been observed, which don’t affect the image quality. In conclusion, endoscopic OCT is considered as a promising tool for the comprehensive examination of the human middle ear.
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Affiliation(s)
- Lars Kirsten
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Fetscherstraße 74, 01307 Dresden, Germany
| | - Joseph Morgenstern
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Fetscherstraße 74, 01307 Dresden, Germany
| | - Mikael Timo Erkkilä
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Fetscherstraße 74, 01307 Dresden, Germany
- Medical University of Vienna, Center for Medical Physics and Biomedical Engineering, Waehringer Guertel 18-20, A-1090 Vienna, Austria, e-mail:
| | - Martin Schindler
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Fetscherstraße 74, 01307 Dresden, Germany
| | - Jonas Golde
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Fetscherstraße 74, 01307 Dresden, Germany
| | - Julia Walther
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Fetscherstraße 74, 01307 Dresden, Germany
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Medical Physics and Biomedical Engineering, Fetscherstraße 74, 01307 Dresden, Germany
| | - Max Kemper
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Fetscherstraße 74, 01307 Dresden, Germany
| | - Thomas Stoppe
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Fetscherstraße 74, 01307 Dresden, Germany
| | - Matthias Bornitz
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Fetscherstraße 74, 01307 Dresden, Germany
| | - Marcus Neudert
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Fetscherstraße 74, 01307 Dresden, Germany
| | - Thomas Zahnert
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Otorhinolaryngology, Fetscherstraße 74, 01307 Dresden, Germany
| | - Edmund Koch
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Critical Care Medicine, Clinical Sensoring and Monitoring, Fetscherstraße 74, 01307 Dresden, Germany
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Golde J, Tomiček O, Uzel R, Lühr W, Diénert F, Villemaine F, Elvove E, Adams HW, Buswell AM, Schroeder WC, Thompson TG, Houlton HG, Kaeß A, Bach H, Kaschinski P, Lasarew K, Konarew M. Untersuchung von Wasser, Abwasser und Schlamm. Anal Bioanal Chem 1935. [DOI: 10.1007/bf01382757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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