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Liu W, Chen G, Xie J, Liang T, Zhang C, Liao X, Liao W, Song L, Zhang X. A New Coordinate System for Magnetic Resonance Imaging of the Vestibular System. Front Neurol 2022; 12:789887. [PMID: 35069419 PMCID: PMC8766740 DOI: 10.3389/fneur.2021.789887] [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: 10/05/2021] [Accepted: 12/06/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: To develop and evaluate a new coordinate system for MRI of the vestibular system. Methods: In this study, 53 internal auditory canal MRI and 78 temporal bone CT datasets were analyzed. Mimics Medical software version 21.0 was used to visualize and three-dimensionally reconstruct the image data. We established a new coordinate system, named W–X, based on the center of the bilateral eyeballs and vertex of the bilateral superior semicircular canals. Using the W–X coordinate system and Reid's coordinate system, we measured the orientations of the planes of the anterior semicircular canal (ASCC), the lateral semicircular canal (LSCC), and the posterior semicircular canal (PSCC). Results: No significant differences between the angles measured using CT and MRI were found for any of the semicircular canal planes (p > 0.05). No statistical differences were found between the angles measured using Reid's coordinate system (CT) and the W–X coordinate system (MRI). The mean values of ∠ASCC & LSCC, ∠ASCC & PSCC, and ∠LSCC & PSCC were 84.67 ± 5.76, 94.21 ± 3.81, and 91.79 ± 5.22 degrees, respectively. The angle between the LSCC plane and the horizontal imaging plane was 15.64 ± 3.92 degrees, and the angle between the PSCC plane and the sagittal imaging plane was 48.79 ± 4.46 degrees. Conclusion: A new W–X coordinate system was developed for MRI studies of the vestibular system and can be used to measure the orientations of the semicircular canals.
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Affiliation(s)
- Weixing Liu
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Gui Chen
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Junyang Xie
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Tianhao Liang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chunyi Zhang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiao Liao
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wenjing Liao
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Lijuan Song
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiaowen Zhang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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Wu S, Lin P, Zheng Y, Zhou Y, Liu Z, Yang X. Measurement of Human Semicircular Canal Spatial Attitude. Front Neurol 2021; 12:741948. [PMID: 34630312 PMCID: PMC8498035 DOI: 10.3389/fneur.2021.741948] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/27/2021] [Indexed: 11/16/2022] Open
Abstract
Located deep in the temporal bone, the semicircular canal is a subtle structure that requires a spatial coordinate system for measurement and observation. In this study, 55 semicircular canal and eyeball models were obtained by segmentation of MRI data. The spatial coordinate system was established by taking the top of the common crus and the bottom of the eyeball as the horizontal plane. First, the plane equation was established according to the centerline of the semicircular canals. Then, according to the parameters of the plane equation, the plane normal vectors were obtained. Finally, the average unit normal vector of each semicircular canal plane was obtained by calculating the average value of the vectors. The standard normal vectors of the and left posterior semicircular canal, superior semicircular canal and lateral semicircular canal were [−0.651, 0.702, 0.287], [0.749, 0.577, 0.324], [−0.017, −0.299, 0.954], [0.660, 0.702, 0.266], [−0.739, 0.588, 0.329], [0.025, −0.279, 0.960]. The different angles for the different ways of calculating the standard normal vectors of the right and left posterior semicircular canal, superior semicircular canal and lateral semicircular canal were 0.011, 0.028, 0.008, 0.011, 0.024, and 0.006 degrees. The technology for measuring the semicircular canal spatial attitudes in this study are reliable, and the measurement results can guide vestibular function examinations and help with guiding the diagnosis and treatment of BPPV.
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Affiliation(s)
- Shuzhi Wu
- Neurology Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Ping Lin
- Neurology Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Yanyan Zheng
- Neurology Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Yifei Zhou
- ENT Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Zhaobang Liu
- Department of Medical Imaging, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, China
| | - Xiaokai Yang
- Neurology Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
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Systematic Method for Morphological Reconstruction of the Semicircular Canals Using a Fully Automatic Skeletonization Process. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9224904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present a novel method to characterize the morphology of semicircular canals of the inner ear. Previous experimental works have a common nexus, the human-operator subjectivity. Although these methods are mostly automatic, they rely on a human decision to determine some particular anatomical positions. We implement a systematic analysis where there is no human subjectivity. Our approach is based on a specific magnetic resonance study done in a group of 20 volunteers. From the raw data, the proposed method defines the centerline of all three semicircular canals through a skeletonization process and computes the angle of the functional pair and other geometrical parameters. This approach allows us to assess the inter-operator effect on other methods. From our results, we conclude that, although an average geometry can be defined, the inner ear anatomy cannot be reduced to a single geometry as seen in previous experimental works. We observed a relevant variability of the geometrical parameters in our cohort of volunteers that hinders this usual simplification.
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Beaudet A, Dumoncel J, de Beer F, Durrleman S, Gilissen E, Oettlé A, Subsol G, Thackeray JF, Braga J. The endocranial shape of Australopithecus africanus: surface analysis of the endocasts of Sts 5 and Sts 60. J Anat 2017; 232:296-303. [PMID: 29148040 DOI: 10.1111/joa.12745] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2017] [Indexed: 11/30/2022] Open
Abstract
Assessment of global endocranial morphology and regional neuroanatomical changes in early hominins is critical for the reconstruction of evolutionary trajectories of cerebral regions in the human lineage. Early evidence of cortical reorganization in specific local areas (e.g. visual cortex, inferior frontal gyrus) is perceptible in the non-human South African hominin fossil record. However, to date, little information is available regarding potential global changes in the early hominin brain. The introduction of non-invasive imaging techniques opens up new perspectives for the study of hominin brain evolution. In this context, our primary aim in this study is to explore the organization of the Australopithecus africanus endocasts, and highlight the nature and extent of the differences distinguishing A. africanus from the extant hominids at both local and global scales. By means of X-ray-based imaging techniques, we investigate two A. africanus specimens from Sterkfontein Member 4, catalogued as Sts 5 and Sts 60, respectively a complete cranium and a partial cranial endocast. Endocrania were virtually reconstructed and compared by using a landmark-free registration method based on smooth and invertible surface deformation. Both local and global information provided by our deformation-based approach are used to perform statistical analyses and topological mapping of inter-specific variation. Statistical analyses indicate that the endocranial shape of Sts 5 and Sts 60 approximates the Pan condition. Furthermore, our study reveals substantial differences with respect to the extant human condition, particularly in the parietal regions. Compared with Pan, the endocranial shape of the fossil specimens differs in the anterior part of the frontal gyri.
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Affiliation(s)
- Amélie Beaudet
- School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg, South Africa.,Department of Anatomy, University of Pretoria, Pretoria, South Africa
| | - Jean Dumoncel
- Laboratoire d'Anthropologie Moléculaire et Imagerie de Synthèse, UMR 5288 CNRS-Université de Toulouse (Paul Sabatier), Toulouse Cedex, France.,Institut de Recherche en Informatique de Toulouse, UMR 5505 CNRS-Université de Toulouse (Paul Sabatier), Toulouse Cedex, France
| | - Frikkie de Beer
- Radiation Science Department, South African Nuclear Energy Corporation (Necsa), Pelindaba, South Africa
| | - Stanley Durrleman
- Institut du Cerveau et de la Moelle épinière, Aramis Team, INRIA Paris, Sorbonne Universités, UPMC Université Paris 06 UMR S 1127, Inserm U 1127, CNRS UMR 7225, Paris, France
| | - Emmanuel Gilissen
- Department of African Zoology, Royal Museum for Central Africa, Tervuren, Belgium.,Laboratory of Histology and Neuropathology, Université Libre de Bruxelles, Brussels, Belgium
| | - Anna Oettlé
- Department of Anatomy, University of Pretoria, Pretoria, South Africa.,Department of Anatomy and Histology, Sefako Makgatho Health Sciences University, Pretoria, South Africa
| | - Gérard Subsol
- Montpellier Laboratory of Informatics, Robotics and Microelectronics, UMR 5506 CNRS, Université de Montpellier, Montpellier, France
| | - John Francis Thackeray
- Evolutionary Studies Institute and School of Geosciences, University of the Witwatersrand, Johannesburg, South Africa
| | - José Braga
- Laboratoire d'Anthropologie Moléculaire et Imagerie de Synthèse, UMR 5288 CNRS-Université de Toulouse (Paul Sabatier), Toulouse Cedex, France.,Evolutionary Studies Institute and School of Geosciences, University of the Witwatersrand, Johannesburg, South Africa
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Lyu HY, Chen KG, Yin DM, Hong J, Yang L, Zhang TY, Dai PD. The Age-Related Orientational Changes of Human Semicircular Canals. Clin Exp Otorhinolaryngol 2016; 9:109-15. [PMID: 27090280 PMCID: PMC4881327 DOI: 10.21053/ceo.2014.02012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/13/2015] [Accepted: 06/10/2015] [Indexed: 11/22/2022] Open
Abstract
Objectives Some changes are found in the labyrinth anatomy during postnatal development. Although the spatial orientation of semicircular canals was thought to be stable after birth, we investigated the age-related orientational changes of human semicircular canals during development. Methods We retrospectively studied the computed tomography (CT) images of both ears of 76 subjects ranged from 1 to 70 years old. They were divided into 4 groups: group A (1–6 years), group B (7–12 years), group C (13–18 years), and group D (>18 years). The anatomical landmarks of the inner ear structures were determined from CT images. Their coordinates were imported into MATLAB software for calculating the semicircular canals orientation, angles between semicircular canal planes and the jugular bulb (JB) position. Differences between age groups were analyzed using multivariate statistics. Relationships between variables were analyzed using Pearson analysis. Results The angle between the anterior semicircular canal plane and the coronal plane, and the angle between the horizontal semicircular canal plane and the coronal plane were smaller in group D than those in group A (P<0.05). The JB position, especially the anteroposterior position of right JB, correlated to the semicircular canals orientation (P<0.05). However, no statistically significant differences in the angles between ipsilateral canal planes among different age groups were found. Conclusion The semicircular canals had tendencies to tilt anteriorly simultaneously as a whole with age. The JB position correlated to the spatial arrangement of semicircular canals, especially the right JB. Our calculation method helps detect developmental and pathological changes in vestibular anatomy.
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Affiliation(s)
- Hui-Ying Lyu
- Department of Otolaryngology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Ke-Guang Chen
- Department of Otolaryngology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Dong-Ming Yin
- Department of Otolaryngology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Juan Hong
- Department of Otolaryngology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Lin Yang
- Research Center, Eye and ENT Hospital, Fudan University, Shanghai, China.,Key Laboratory of Hearing Medicine, National Ministry of Public Health, Shanghai, China
| | - Tian-Yu Zhang
- Department of Otolaryngology, Eye and ENT Hospital, Fudan University, Shanghai, China.,Key Laboratory of Hearing Medicine, National Ministry of Public Health, Shanghai, China
| | - Pei-Dong Dai
- Research Center, Eye and ENT Hospital, Fudan University, Shanghai, China.,Key Laboratory of Hearing Medicine, National Ministry of Public Health, Shanghai, China
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Toyoda S, Shiraki N, Yamada S, Uwabe C, Imai H, Matsuda T, Yoneyama A, Takeda T, Takakuwa T. Morphogenesis of the Inner Ear at Different Stages of Normal Human Development. Anat Rec (Hoboken) 2015; 298:2081-90. [DOI: 10.1002/ar.23268] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 06/08/2015] [Accepted: 07/09/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Saki Toyoda
- Human Health Science; Kyoto University; Kyoto Japan
| | | | - Shigehito Yamada
- Human Health Science; Kyoto University; Kyoto Japan
- Congenital Anomaly Research Center, Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - Chigako Uwabe
- Congenital Anomaly Research Center, Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - Hirohiko Imai
- Department of Systems Science, Graduate School of Informatics; Kyoto University; Kyoto Japan
| | - Tetsuya Matsuda
- Department of Systems Science, Graduate School of Informatics; Kyoto University; Kyoto Japan
| | - Akio Yoneyama
- Allied Health Science, Kitazato University; Kanagawa Japan
| | - Tohoru Takeda
- Allied Health Science, Kitazato University; Kanagawa Japan
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