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Ríos-Osorio N, Quijano-Guauque S, Briñez-Rodríguez S, Velasco-Flechas G, Muñoz-Solís A, Chávez C, Fernandez-Grisales R. Cone-beam computed tomography in endodontics: from the specific technical considerations of acquisition parameters and interpretation to advanced clinical applications. Restor Dent Endod 2024; 49:e1. [PMID: 38449497 PMCID: PMC10912545 DOI: 10.5395/rde.2024.49.e1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/26/2023] [Accepted: 10/13/2023] [Indexed: 03/08/2024] Open
Abstract
The implementation of imaging methods that enable sensitive and specific observation of anatomical structures has been a constant in the evolution of endodontic therapy. Cone-beam computed tomography (CBCT) enables 3-dimensional (3D) spatial anatomical navigation in the 3 volumetric planes (sagittal, coronal and axial) which translates into great accuracy for the identification of endodontic pathologies/conditions. CBCT interpretation consists of 2 main components: (i) the generation of specific tasks of the image and (ii) the subsequent interpretation report. A systematic and reproducible method to review CBCT scans can improve the accuracy of the interpretation process, translating into greater precision in terms of diagnosis and planning of endodontic clinical procedures. MEDLINE (PubMed), Web of Science, Google Scholar, Embase and Scopus were searched from inception to March 2023. This narrative review addresses the theoretical concepts, elements of interpretation and applications of the CBCT scan in endodontics. In addition, the contents and rationale for reporting 3D endodontic imaging are discussed.
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Affiliation(s)
- Néstor Ríos-Osorio
- Research Department COC-CICO, Institución Universitaria Colegios de Colombia UNICOC, Bogotá, Colombia
| | - Sara Quijano-Guauque
- Research Department COC-CICO, Institución Universitaria Colegios de Colombia UNICOC, Bogotá, Colombia
| | - Sandra Briñez-Rodríguez
- Research Department COC-CICO, Institución Universitaria Colegios de Colombia UNICOC, Bogotá, Colombia
| | - Gustavo Velasco-Flechas
- Research Department COC-CICO, Institución Universitaria Colegios de Colombia UNICOC, Bogotá, Colombia
| | | | - Carlos Chávez
- Postgraduate Endodontics Department, IMED, Guadalajara, México
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You Y, Park JS. A Novel Human Brainstem Map Based on True-Color Sectioned Images. J Korean Med Sci 2023; 38:e76. [PMID: 36918030 PMCID: PMC10010912 DOI: 10.3346/jkms.2023.38.e76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/14/2022] [Indexed: 03/06/2023] Open
Abstract
BACKGROUND Existing atlases for the human brainstem were generated from magnetic resonance images or traditional histologically stained slides, but both are insufficient for the identification of detailed brainstem structures at uniform intervals. METHODS A total of 319 sectioned images of the brainstem were selected from whole-body axial sectioned images, then coronal and sagittal sectioned images were reconstructed from the horizontal images. The fine and detailed structures were annotated in PowerPoint slides, then the volume model was produced and some white matter fibers were traced using MRIcroGL. RESULTS In this study, a novel brainstem atlas based on sectioned images was generated that shows the true color and shape, as well as the accurate location of the nuclei and tracts; it reveals the striking contrast between gray and white matter, as well as fine structures. In total, 212 structures, including nuclei and tracts, were annotated in axial, coronal, and sagittal plane views of sectioned images (48-bit true color; 0.2 mm intervals, 0.06 mm × 0.06 mm pixel size). To verify the accuracy of the annotations, a volume model of the brainstem was constructed for independent observations of the three planes. CONCLUSION In this paper, we describe several interesting structures included in the atlas. By depicting the fine structures of the human brainstem in detail, this atlas allows comprehensive understanding of the complicated topographies of the brainstem. As such, it will be of value for neuroanatomy education and research, in addition to enriching the literature on the human brain.
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Affiliation(s)
- Yaqian You
- Department of Anatomy, Dongguk University School of Medicine, Gyeongju, Korea
| | - Jin Seo Park
- Department of Anatomy, Dongguk University School of Medicine, Gyeongju, Korea.
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Ose T, Autio JA, Ohno M, Frey S, Uematsu A, Kawasaki A, Takeda C, Hori Y, Nishigori K, Nakako T, Yokoyama C, Nagata H, Yamamori T, Van Essen DC, Glasser MF, Watabe H, Hayashi T. Anatomical variability, multi-modal coordinate systems, and precision targeting in the marmoset brain. Neuroimage 2022; 250:118965. [PMID: 35122965 PMCID: PMC8948178 DOI: 10.1016/j.neuroimage.2022.118965] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 01/31/2022] [Accepted: 02/01/2022] [Indexed: 01/02/2023] Open
Abstract
Localising accurate brain regions needs careful evaluation in each experimental species due to their individual variability. However, the function and connectivity of brain areas is commonly studied using a single-subject cranial landmark-based stereotactic atlas in animal neuroscience. Here, we address this issue in a small primate, the common marmoset, which is increasingly widely used in systems neuroscience. We developed a non-invasive multi-modal neuroimaging-based targeting pipeline, which accounts for intersubject anatomical variability in cranial and cortical landmarks in marmosets. This methodology allowed creation of multi-modal templates (MarmosetRIKEN20) including head CT and brain MR images, embedded in coordinate systems of anterior and posterior commissures (AC-PC) and CIFTI grayordinates. We found that the horizontal plane of the stereotactic coordinate was significantly rotated in pitch relative to the AC-PC coordinate system (10 degrees, frontal downwards), and had a significant bias and uncertainty due to positioning procedures. We also found that many common cranial and brain landmarks (e.g., bregma, intraparietal sulcus) vary in location across subjects and are substantial relative to average marmoset cortical area dimensions. Combining the neuroimaging-based targeting pipeline with robot-guided surgery enabled proof-of-concept targeting of deep brain structures with an accuracy of 0.2 mm. Altogether, our findings demonstrate substantial intersubject variability in marmoset brain and cranial landmarks, implying that subject-specific neuroimaging-based localization is needed for precision targeting in marmosets. The population-based templates and atlases in grayordinates, created for the first time in marmoset monkeys, should help bridging between macroscale and microscale analyses.
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Affiliation(s)
- Takayuki Ose
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan.
| | - Joonas A Autio
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
| | - Masahiro Ohno
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
| | | | - Akiko Uematsu
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
| | - Akihiro Kawasaki
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
| | - Chiho Takeda
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
| | - Yuki Hori
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Department of Functional Brain Imaging, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.
| | - Kantaro Nishigori
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan.
| | - Tomokazu Nakako
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Sumitomo Dainippon Pharma Co., Ltd., Osaka, Japan.
| | - Chihiro Yokoyama
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Faculty of Human life and Environmental Science, Nara women's University, Nara, Japan.
| | | | - Tetsuo Yamamori
- Laboratory for Molecular Analysis of Higher Brain Function, RIKEN Center for Brain Science, Wako, Japan.
| | - David C Van Essen
- Department of Neuroscience, Washington University Medical School, St Louis, MO USA.
| | - Matthew F Glasser
- Department of Neuroscience, Washington University Medical School, St Louis, MO USA; Department of Radiology, Washington University Medical School, St Louis, MO USA.
| | - Hiroshi Watabe
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan.
| | - Takuya Hayashi
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Department of Brain Connectomics, Kyoto University Graduate School of Medicine, Kyoto, Japan.
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Mohtasebi M, Bayat M, Ghadimi S, Abrishami Moghaddam H, Wallois F. Modeling of Neonatal Skull Development Using Computed Tomography Images. Ing Rech Biomed 2021. [DOI: 10.1016/j.irbm.2020.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Chen XD, Ma QJ, Wang J, Zhou YS, Geng MY, Gao CS, Gao P, Li Y. The Creation of an Experimental Data Set Containing Coronal Section Images of a Human Head. EAR, NOSE & THROAT JOURNAL 2021; 101:37S-42S. [PMID: 33474979 DOI: 10.1177/0145561321989432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES The aim of the research is to create an experimental data set of coronal section images of a human head. METHODS The head of a 49-year-old male cadaver was scanned by computed tomography (CT), then perfused with a green filling material via the bilateral common carotid artery, before being frozen and embedded. The head was sectioned along the coronal plane by a computer-controlled 5520 engraving and milling machine, capable of either 0.03-mm or 0.06-mm interspacing. All images were captured with a Canon 5D-Mk III digital camera. RESULTS A total of 3854 section images were obtained, each with a resolution of 5760 × 3840 pixels. The number of section images at 0.03- and 0.06-mm interspacing were 1437 and 2417, respectively. All the images were stored in JPG and RAW formats. The image size of each RAW format was about 24.5 MB, whereas for JPG format, the equivalent size was about 5.9 MB. All the RAW and JPG images together occupied 117.35 GB of disk space. CONCLUSIONS The interspacing of this data set section was thinner than those of any comparable studies, and the image resolution was higher, too. This data set was also the first to take coronal sections of the human head. The data set contains image information from the smallest structures within the human head and can satisfy the needs of future developments and applications, such as the virtual operation training systems for otolaryngology, ophthalmology, stomatology, and neurosurgery, and help develop medical teaching software and maps.
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Affiliation(s)
- Xiang-Dong Chen
- Department of Otolaryngology, Head and Neck Surgery, Affiliated General Hospital of Shenzhen University, Shenzhen, China
| | - Qiong-Jie Ma
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - Jun Wang
- Department of Otolaryngology, Head and Neck Surgery, Affiliated General Hospital of Shenzhen University, Shenzhen, China
| | | | - Man-Ying Geng
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | | | - Pan Gao
- Department of Otolaryngology, Head and Neck Surgery, Affiliated General Hospital of Shenzhen University, Shenzhen, China
| | - Yan Li
- Department of Otolaryngology, Head and Neck Surgery, Affiliated General Hospital of Shenzhen University, Shenzhen, China
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Carry PM, Duke VR, Brazell CJ, Stence N, Scholes M, Rousie DL, Hadley Miller N. Lateral semi-circular canal asymmetry in females with idiopathic scoliosis. PLoS One 2020; 15:e0232417. [PMID: 32349123 PMCID: PMC7190182 DOI: 10.1371/journal.pone.0232417] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 04/14/2020] [Indexed: 01/09/2023] Open
Abstract
Purpose Adolescent idiopathic scoliosis (AIS) is a three-dimensional spinal structural deformity that occurs in otherwise normal individuals. Although curve progression and severity vary amongst individuals, AIS can lead to significant cosmetic and functional deformity. AIS etiology has been determined to be genetic, however, exact genetic and biological processes underlying this disorder remain unknown. Vestibular structure and function have potentially been related to the etiopathogenesis of AIS. Here, we aimed to characterize the anatomy of the semicircular canals (SCC) within the vestibular system through a novel approach utilizing T2-weighted magnetic resonance images (MRI). Methods Three dimensional, MRI-based models of the SCCs were generated from AIS subjects (n = 20) and healthy control subjects (n = 19). Linear mixed models were used to compare SCC morphological measurements in the two groups. We compared side-to-side differences in the SCC measurements between groups (group*side interaction). Results Side-to-side differences in the lateral SCC were different between the two groups [false discovery rate adjusted p-value: 0.0107]. Orientation of right versus left lateral SCC was significantly different in the AIS group compared to the control group [mean side-to-side difference: -4.1°, 95% CI: -6.4° to -1.7°]. Overall, among subjects in the AIS group, the left lateral SCC tended to be oriented in a more horizontal position than subjects in the control group. Significance Asymmetry within the SCCs of the vestibular system of individuals with AIS potentially results in abnormal efferent activity to postural muscles. Consequences of this muscular activity during periods of rapid growth, which often coincides with AIS onset and progression, warrant consideration.
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Affiliation(s)
- Patrick M. Carry
- Department of Orthopaedic Surgery, Musculoskeletal Research Center, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | - Victoria R. Duke
- Department of Orthopaedic Surgery, Musculoskeletal Research Center, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | - Christopher J. Brazell
- Department of Orthopaedic Surgery, Musculoskeletal Research Center, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | - Nicholas Stence
- Department of Radiology, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | - Melissa Scholes
- Department of Otolaryngology, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | | | - Nancy Hadley Miller
- Department of Orthopaedic Surgery, Musculoskeletal Research Center, Children’s Hospital Colorado, Aurora, Colorado, United States of America
- * E-mail:
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Chung BS, Han M, Har D, Park JS. Advanced Sectioned Images of a Cadaver Head with Voxel Size of 0.04 mm. J Korean Med Sci 2019; 34:e218. [PMID: 31456382 PMCID: PMC6717240 DOI: 10.3346/jkms.2019.34.e218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 07/22/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The sectioned images of a cadaver head made from the Visible Korean project have been used for research and educational purposes. However, the image resolution is insufficient to observe detailed structures suitable for experts. In this study, advanced sectioned images with higher resolution were produced for the identification of more detailed structures. METHODS The head of a donated female cadaver was scanned for 3 Tesla magnetic resonance images and diffusion tensor images (DTIs). After the head was frozen, the head was sectioned serially at 0.04-mm intervals and photographed repeatedly using a digital camera. RESULTS On the resulting 4,000 sectioned images (intervals and pixel size, 0.04 mm³; color depth, 48 bits color; a file size, 288 Mbytes), minute brain structures, which can be observed not on previous sectioned images but on microscopic slides, were observed. The voxel size of this study (0.04 mm³) was very minute compared to our previous study (0.1 mm³; resolution, 4,368 × 2,912) and Visible Human Project of the USA (0.33 mm³; resolution, 2,048 × 2,048). Furthermore, the sectioned images were combined with tractography of the DTIs to elucidate the white matter with high resolution and the actual color of the tissue. CONCLUSION The sectioned images will be used for diverse research, including the applications for the cross sectional anatomy and three-dimensional models for virtual experiments.
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Affiliation(s)
- Beom Sun Chung
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
| | - Miran Han
- Department of Radiology, Ajou University School of Medicine, Suwon, Korea
| | - Donghwan Har
- College of ICT Engineering, Chung Ang University, Seoul, Korea
| | - Jin Seo Park
- Department of Anatomy, Dongguk University School of Medicine, Gyeongju, Korea.
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Chung BS, Jeon CY, Huh JW, Jeong KJ, Har D, Kwack KS, Park JS. Rise of the Visible Monkey: Sectioned Images of Rhesus Monkey. J Korean Med Sci 2019; 34:e66. [PMID: 30833883 PMCID: PMC6393759 DOI: 10.3346/jkms.2019.34.e66] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 01/29/2019] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Gross anatomy and sectional anatomy of a monkey should be known by students and researchers of veterinary medicine and medical research. However, materials to learn the anatomy of a monkey are scarce. Thus, the objective of this study was to produce a Visible Monkey data set containing cross sectional images, computed tomographs (CTs), and magnetic resonance images (MRIs) of a monkey whole body. METHODS Before and after sacrifice, a female rhesus monkey was used for 3 Tesla MRI and CT scanning. The monkey was frozen and sectioned at 0.05 mm intervals for the head region and at 0.5 mm intervals for the rest of the body using a cryomacrotome. Each sectioned surface was photographed using a digital camera to obtain horizontal sectioned images. Segmentation of sectioned images was performed to elaborate three-dimensional (3D) models of the skin and brain. RESULTS A total of 1,612 horizontal sectioned images of the head and 1,355 images of the remaining region were obtained. The small pixel size (0.024 mm × 0.024 mm) and real color (48 bits color) of these images enabled observations of minute structures. CONCLUSION Due to small intervals of these images, continuous structures could be traced completely. Moreover, 3D models of the skin and brain could be used for virtual dissections. Sectioned images of this study will enhance the understanding of monkey anatomy and foster further studies. These images will be provided to any requesting researcher free of charge.
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Affiliation(s)
- Beom Sun Chung
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
| | - Chang-Yeop Jeon
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, Korea
| | - Jae-Won Huh
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, Korea
- Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, Korea
| | - Kang-Jin Jeong
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, Korea
| | - Donghwan Har
- College of ICT Engineering, Chung Ang University, Seoul, Korea
| | - Kyu-Sung Kwack
- Department of Radiology, Ajou University School of Medicine, Suwon, Korea
| | - Jin Seo Park
- Department of Anatomy, Dongguk University School of Medicine, Gyeongju, Korea
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Ho A, Affoo R, Rogus-Pulia N, Nicosia M, Inamoto Y, Saitoh E, Green S, Fels S. Inferring the effects of saliva on liquid bolus flow using computer simulation. Comput Biol Med 2017; 89:304-313. [DOI: 10.1016/j.compbiomed.2017.07.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/15/2017] [Accepted: 07/26/2017] [Indexed: 01/13/2023]
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Chung BS, Ahn YH, Park JS. Ten Triangles around Cavernous Sinus for Surgical Approach, Described by Schematic Diagram and Three Dimensional Models with the Sectioned Images. J Korean Med Sci 2016; 31:1455-63. [PMID: 27510391 PMCID: PMC4974189 DOI: 10.3346/jkms.2016.31.9.1455] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 05/13/2016] [Indexed: 11/20/2022] Open
Abstract
For the surgical approach to lesions around the cavernous sinus (CS), triangular spaces around CS have been devised. However, educational materials for learning the triangles were insufficient. The purpose of this study is to present educational materials about the triangles, consisting of a schematic diagram and 3-dimensional (3D) models with sectioned images. To achieve the purposes, other studies were analyzed to establish new definitions and names of the triangular spaces. Learning materials including schematic diagrams and 3D models with cadaver's sectioned images were manufactured. Our new definition was attested by observing the sectioned images and 3D models. The triangles and the four representative surgical approaches were stereoscopically indicated on the 3D models. All materials of this study were put into Portable Document Format file and were distributed freely at our homepage (anatomy.dongguk.ac.kr/triangles). By using our schematic diagram and the 3D models with sectioned images, ten triangles and the related structures could be understood and observed accurately. We expect that our data will contribute to anatomy education, surgery training, and radiologic understanding of the triangles and related structures.
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Affiliation(s)
- Beom Sun Chung
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
| | - Young Hwan Ahn
- Department of Neurosurgery, Ajou University School of Medicine, Suwon, Korea
| | - Jin Seo Park
- Department of Anatomy, Dongguk University School of Medicine, Gyeongju, Korea.
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Chung BS, Chung MS, Park JS. Six Walls of the Cavernous Sinus Identified by Sectioned Images and Three-Dimensional Models: Anatomic Report. World Neurosurg 2015; 84:337-44. [DOI: 10.1016/j.wneu.2015.03.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 11/30/2022]
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Park HS, Chung MS, Shin DS, Jung YW, Park JS. Whole courses of the oculomotor, trochlear, and abducens nerves, identified in sectioned images and surface models. Anat Rec (Hoboken) 2014; 298:436-43. [PMID: 25212480 DOI: 10.1002/ar.23048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/31/2014] [Accepted: 08/01/2014] [Indexed: 11/11/2022]
Abstract
In medicine, the neuroanatomy of the oculomotor (III), trochlear (IV), and abducens nerves (VI) is learned essentially by cadaver dissection, histological specimens, and MRI. However, these methods have many limitations and it is necessary to compensate for the insufficiencies of previous methods. The aim of this research was to present sectioned images and surface models that allow the whole courses of III, IV, and VI and circumjacent structures to be observed in detail. To achieve this, the structures of whole courses of III, IV, and VI were traced on the sectioned images, and surface models of the structures were reconstructed. As a result, nucleus of III, Edinger-Westphal nucleus, nucleus of IV, and nucleus of VI and their fibers were identified on brainstem in the sectioned images. In the sectioned images, III, IV, and VI passed both sides of the cavernous sinus and entered at the orbit through the superior orbital fissure. In the sectioned images, III, IV, and VI innervated extraocular muscles in orbit. In surface models, the whole courses of III, IV, and VI and circumjacent structures could be explored freely three-dimensionally. The greatest advantage of the sectioned images was that they allowed the whole courses of III, IV, and VI and circumjacent structures to be observed as real colored in an unbroken line. In addition, the surface models allowed the stereoscopic shapes and positions of III, IV, and VI to be comprehended. The sectioned images and surface models could be applied for medical education purposes or training tools. All data generated during this study is available free of charge at anatomy.dongguk.ac.kr/cn/.
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Affiliation(s)
- Hyo Seok Park
- Department of Anatomy, Keimyung University School of Medicine, 1095 Dalgubeol-daero, Daegu, 704-701, Republic of Korea
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Park HS, Shin DS, Cho DH, Jung YW, Park JS. Improved sectioned images and surface models of the whole dog body. Ann Anat 2014; 196:352-9. [PMID: 24986152 DOI: 10.1016/j.aanat.2014.05.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 05/20/2014] [Indexed: 11/26/2022]
Abstract
The objective of this research was to produce high-quality sectioned images of a whole dog which can be used to create sectional anatomy atlases and three-dimensional (3D) models. A year old female beagle was sacrificed by potassium chloride injection and frozen. The frozen dog was then serially ground using a cryomacrotome. Sectioned surfaces were photographed using a digital camera to create 3555 sectioned images of whole dog body (intervals, 0.2 mm; pixel size, 0.1 mm; 48 bit color). In a sectioned image, structures of dimension greater than 0.1mm could be identified in detail. Photoshop was used to make segmented images of 16 structures. Sectioned and segmented images were stored in browsing software to allow easy access. Segmented images were reconstructed to make surface models of 16 structures using Mimics software and stored in portable document format (PDF) using Adobe 3D Reviewer software. In this research, state-of-art sectioned images and surface models were produced for the dog. The authors hope that the sectioned images produced will become a useful source of software for basic and clinical veterinary medicine, and therefore, are distributing the sectioned images and surface models through browsing software and PDF file available free of charge.
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Affiliation(s)
- Hyo Seok Park
- Department of Anatomy, Keimyung University School of Medicine, 1095 Dalgubeol-daero, Daegu 704-701, Republic of Korea.
| | - Dong Sun Shin
- Department of Anatomy, Ajou University School of Medicine, Suwon 443-749, Republic of Korea.
| | - Dai Hai Cho
- Department of Emergency Medicine, Dongguk University School of Medicine, Gyeongju 780-350, Republic of Korea.
| | - Yong Wook Jung
- Department of Anatomy, Dongguk University School of Medicine, 87 Dongdae-ro, Gyeongju 780-350, Republic of Korea.
| | - Jin Seo Park
- Department of Anatomy, Dongguk University School of Medicine, 87 Dongdae-ro, Gyeongju 780-350, Republic of Korea.
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Ho AK, Tsou L, Green S, Fels S. A 3D swallowing simulation using smoothed particle hydrodynamics. COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING: IMAGING & VISUALIZATION 2014. [DOI: 10.1080/21681163.2013.862862] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Choi SH, Chi JG, Kim YB, Cho ZH. Anterior commissure--posterior commissure revisited. Korean J Radiol 2013; 14:653-61. [PMID: 23901324 PMCID: PMC3725361 DOI: 10.3348/kjr.2013.14.4.653] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2012] [Accepted: 03/29/2013] [Indexed: 11/15/2022] Open
Abstract
Objective The anterior commissure (AC) and posterior commissure (PC) are the two distinct anatomic structures in the brain which are difficult to observe in detail with conventional MRI, such as a 1.5T MRI system. However, recent advances in ultra-high resolution MRI have enabled us to examine the AC and PC directly. The objective of the present study is to standardize the shape and size of the AC and PC using a 7.0T MRI and to propose a new brain reference line. Materials and Methods Thirty-four, 21 males and 13 females, healthy volunteers were enrolled in this study. After determining the center of each AC and PC, we defined the connection of these centers as the central intercommissural line (CIL). We compared the known extra- and intra-cerebral reference lines with the CIL to determine the difference in the angles. Additionally, we obtained horizontal line from flat ground line of look front human. Results The difference in angle of the CIL and the tangential intercommissural line (TIL) from the horizontal line was 8.7 ± 5.1 (11 ± 4.8) and 17.4 ± 5.2 (19.8 ± 4.8) degrees in males and females, respectively. The difference in angle between the CIL and canthomeatal line was 10.1 in both male and female, and there was no difference between both sexes. Likewise, there was no significant difference in angle between the CIL and TIL between both sexes (8.3 +/- 1.1 in male and 8.8 +/- 0.7 in female). Conclusion In this study, we have used 7.0T MRI to define the AC and PC quantitatively and in a more robust manner. We have showed that the CIL is a reproducible reference line and serves as a standard for the axial images of the human brain.
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Affiliation(s)
- Sang-Han Choi
- Neuroscience Research Institute, Gachon University of Medicine and Science, Incheon 405-760, Korea
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Park HS, Chung MS, Shin DS, Jung YW, Park JS. Accessible and Informative Sectioned Images, Color-Coded Images, and Surface Models of the Ear. Anat Rec (Hoboken) 2013; 296:1180-6. [DOI: 10.1002/ar.22719] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Accepted: 04/18/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Hyo Seok Park
- Department of Anatomy; Dongguk University College of Medicine; Gyeongju Republic of Korea
| | - Min Suk Chung
- Department of Anatomy; Ajou University School of Medicine; Suwon Republic of Korea
| | - Dong Sun Shin
- Department of Anatomy; Ajou University School of Medicine; Suwon Republic of Korea
| | - Yong Wook Jung
- Department of Anatomy; Dongguk University College of Medicine; Gyeongju Republic of Korea
| | - Jin Seo Park
- Department of Anatomy; Dongguk University College of Medicine; Gyeongju Republic of Korea
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17
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Park JS, Chung MS, Chi JG, Park HS, Shin DS. Segmentation of cerebral gyri in the sectioned images by referring to volume model. J Korean Med Sci 2010; 25:1710-5. [PMID: 21165283 PMCID: PMC2995222 DOI: 10.3346/jkms.2010.25.12.1710] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Accepted: 07/22/2010] [Indexed: 11/20/2022] Open
Abstract
Authors had prepared the high-quality sectioned images of a cadaver head. For the delineation of each cerebral gyrus, three-dimensional model of the same brain was required. The purpose of this study was to develop the segmentation protocol of cerebral gyri by referring to the three-dimensional model on the personal computer. From the 114 sectioned images (intervals, 1 mm), a cerebral hemisphere was outlined. On MRIcro software, sectioned images including only the cerebral hemisphere were volume reconstructed. The volume model was rotated to capture the lateral, medial, superior, and inferior views of the cerebral hemisphere. On these four views, areas of 33 cerebral gyri were painted with colors. Derived from the painted views, the cerebral gyri in sectioned images were identified and outlined on the Photoshop to prepare segmented images. The segmented images were used for production of volume and surface models of the selected gyri. The segmentation method developed in this research is expected to be applied to other types of images, such as MRIs. Our results of the sectioned and segmented images of the cadaver brain, acquired in the present study, are hopefully utilized for medical learning tools of neuroanatomy.
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Affiliation(s)
- Jin Seo Park
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea
| | - Min Suk Chung
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
| | - Je-Geun Chi
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Hyo Seok Park
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, Korea
| | - Dong Sun Shin
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
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