Dr. Masahiro Oda Profile

Dr. Masahiro Oda

Associate Professor at Nagoya Univ

SPIE Involvement:

Author

Area of Expertise:

Medical image processing , Computer aided diagnosis , Computer assisted surgery , Deep learning , CT colonography

Websites:

Company Website

Publications (94)

Proceedings Article | 3 April 2024 Poster + Paper

Performance improvement for medical image classification model by using gradient-based analytical feature selection

Ryo Toda, Hayato Itoh, Masahiro Oda, Yuichiro Hayashi, Yoshito Otake, Masahiro Hashimoto, Toshiaki Akashi, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12927, 129272C (2024) https://doi.org/10.1117/12.3006620

KEYWORDS: Visualization, Visual process modeling, Feature selection, Image classification, COVID 19, Data modeling, Medical imaging, Image analysis

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Proceedings Article | 3 April 2024 Presentation + Paper

Boosting substantia nigra segmentation from T2 weighted MRI via test-time normalization and distance-reweighted loss

Tao Hu, Hayato Itoh, Masahiro Oda, Shinji Saiki, Nobutaka Hattori, Koji Kamagata, Wataru Sako, Kei-ichi Ishikawa, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12927, 129270O (2024) https://doi.org/10.1117/12.3008521

KEYWORDS: Magnetic resonance imaging, Voxels, Image segmentation, Parkinson disease, Brain, Deep learning

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Proceedings Article | 2 April 2024 Presentation + Paper

Intestine segmentation from CT volume based on bidirectional teaching

Qin An, Hirohisa Oda, Yuichiro Hayashi, Takayuki Kitasaka, Akinari Hinoki, Hiroo Uchida, Kojiro Suzuki, Aitaro Takimoto, Masahiro Oda, Kensaku Mori

Proceedings Volume 12926, 129260Z (2024) https://doi.org/10.1117/12.3006623

KEYWORDS: Intestine, Image segmentation, Education and training, Convolution, Voxels, Plutonium, Semantics, Computed tomography, Medical imaging, Information science

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Proceedings Article | 2 April 2024 Presentation + Paper

Continued pretraining for enhanced multi-organ segmentation from CT images

Yaqi Yang, Chen Shen, Yucheng Tang, Holger Roth, Masahiro Oda, Yuichiro Hayashi, Kazunari Misawa, Kensaku Mori

Proceedings Volume 12926, 129260K (2024) https://doi.org/10.1117/12.3006630

KEYWORDS: Image segmentation, Data modeling, Computed tomography, Gallbladder, Kidney, Veins, Stomach, Transformers, Spleen

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Proceedings Article | 2 April 2024 Presentation + Paper

Anatomical structure-constrained thrombus region segmentation and measurement using confocal laser scanning microscopic images

Cheng Wang, Yuichiro Hayashi, Masahiro Oda, Yunheng Wu, Shuntaro Kawamura, Takanori Takebe, Kensaku Mori

Proceedings Volume 12930, 129300H (2024) https://doi.org/10.1117/12.3006862

KEYWORDS: Image segmentation, Blood vessels, Anatomy, Laser scanners, Confocal microscopy, Microscopes, Image processing, Fourier transforms, Blood, Visualization

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Proceedings Article | 29 March 2024 Poster + Paper

Adaptive octree cube refinement depending on grasping position for deformable organ models

Rintaro Miyazaki, Yuichiro Hayashi, Masahiro Oda, Kensaku Mori

Proceedings Volume 12928, 1292826 (2024) https://doi.org/10.1117/12.3006816

KEYWORDS: Deformation, Computer simulations, Gallbladder, Virtual reality, Laparoscopy, Device simulation, Tissues, Surgery

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Proceedings Article | 10 April 2023 Presentation + Paper

Thrombosis region extraction and quantitative analysis in confocal laser scanning microscopic image sequence in in-vivo imaging

Yunheng Wu, Masahiro Oda, Yuichiro Hayashi, Shuntaro Kawamura, Takanori Takebe, Kensaku Mori

Proceedings Volume 12468, 124680F (2023) https://doi.org/10.1117/12.2654632

KEYWORDS: Blood circulation, Quantitative analysis, In vivo imaging, Analytical research, Image visualization, Biological research, Biological imaging, Animal model studies, Visualization, Laser scanners

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Proceedings Article | 7 April 2023 Poster + Paper

Classification of COVID-19 cases from chest CT volumes using hybrid model of 3D CNN and 3D MLP-mixer

Masahiro Oda, Tong Zheng, Yuichiro Hayashi, Yoshito Otake, Masahiro Hashimoto, Toshiaki Akashi, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12465, 1246534 (2023) https://doi.org/10.1117/12.2654706

KEYWORDS: 3D modeling, 3D image processing, COVID 19, Image classification, Chest, Computed tomography, Lung

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Proceedings Article | 7 April 2023 Presentation + Paper

Improved method for COVID-19 classification of complex-architecture CNN from chest CT volumes using orthogonal ensemble networks

Ryo Toda, Masahiro Oda, Yuichiro Hayashi, Yoshito Otake, Masahiro Hashimoto, Toshiaki Akashi, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12465, 124650D (2023) https://doi.org/10.1117/12.2653792

KEYWORDS: COVID 19, Computed tomography, Machine learning, Education and training, Chest, Feature extraction, Lung, Computer aided detection

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Proceedings Article | 3 April 2023 Presentation + Paper

A semantic segmentation method for laparoscopic images using semantically similar groups

Leo Uramoto, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Kazunari Misawa, Kensaku Mori

Proceedings Volume 12466, 1246605 (2023) https://doi.org/10.1117/12.2654636

KEYWORDS: Image segmentation, Semantics, Laparoscopy, Machine learning, Surgery, Medical image processing

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Proceedings Article | 3 April 2023 Presentation + Paper

Real bronchoscopic images-based bronchial nomenclature: a preliminary study

Cheng Wang, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Hirotsugu Takabatake, Masaki Mori, Hirotoshi Honma, Hiroshi Natori, Kensaku Mori

Proceedings Volume 12466, 1246603 (2023) https://doi.org/10.1117/12.2654508

KEYWORDS: Cameras, Motion estimation, Computed tomography, Anatomy, Nomenclature, Navigation systems, Bronchoscopy, Feature extraction, Volume rendering, Visualization

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Proceedings Article | 3 April 2023 Poster + Paper

Octree cube constraints in PBD method for high resolution surgical simulation

Rintaro Miyazaki, Yuichiro Hayashi, Masahiro Oda, Kensaku Mori

Proceedings Volume 12464, 124642N (2023) https://doi.org/10.1117/12.2654092

KEYWORDS: Deformation, Liver, Computer simulations, Surgery, Laparoscopy, 3D modeling, Virtual reality, Tissues

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Proceedings Article | 3 April 2023 Poster + Paper

Priority attention network with Bayesian learning for fully automatic segmentation of substantia nigra from neuromelanin MRI

Tao Hu, Hayato Itoh, Masahiro Oda, Shinji Saiki, Nobutaka Hattori, Koji Kamagata, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12464, 124643G (2023) https://doi.org/10.1117/12.2655112

KEYWORDS: Magnetic resonance imaging, Image segmentation, Monte Carlo methods, 3D modeling, Parkinson disease, Network architectures

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Proceedings Article | 3 April 2023 Presentation + Paper

L-former: a lightweight transformer for realistic medical image generation and its application to super-resolution

Tong Zheng, Hirohisa Oda, Yuichiro Hayashi, Shota Nakamura, Masaki Mori, Hirotsugu Takabatake, Hiroshi Natori, Masahiro Oda, Kensaku Mori

Proceedings Volume 12464, 1246415 (2023) https://doi.org/10.1117/12.2653776

KEYWORDS: Transformers, Medical imaging, Super resolution, Education and training, Wavelets, Voxels, Gallium nitride, Discrete wavelet transforms, Biomedical applications, Convolution

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SPIE Journal Paper | 5 April 2022 Open Access

SR-CycleGAN: super-resolution of clinical CT to micro-CT level with multi-modality super-resolution loss

Tong Zheng, Hirohisa Oda, Yuichiro Hayashi, Takayasu Moriya, Shota Nakamura, Masaki Mori, Hirotsugu Takabatake, Hiroshi Natori, Masahiro Oda, Kensaku Mori

JMI, Vol. 9, Issue 02, 024003, (April 2022) https://doi.org/10.1117/12.10.1117/1.JMI.9.2.024003

KEYWORDS: Computed tomography, Lawrencium, X-ray computed tomography, Lung, Super resolution, Lung cancer, Convolution, Image segmentation, Image resolution, Gallium nitride

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Purpose: We propose a super-resolution (SR) method, named SR-CycleGAN, for SR of clinical computed tomography (CT) images to the micro-focus x-ray CT CT (μCT) level. Due to the resolution limitations of clinical CT (about 500 × 500 × 500 μm3 / voxel), it is challenging to obtain enough pathological information. On the other hand, μCT scanning allows the imaging of lung specimens with significantly higher resolution (about 50 × 50 × 50 μm3 / voxel or higher), which allows us to obtain and analyze detailed anatomical information. As a way to obtain detailed information such as cancer invasion and bronchioles from preoperative clinical CT images of lung cancer patients, the SR of clinical CT images to the μCT level is desired. Approach: Typical SR methods require aligned pairs of low-resolution (LR) and high-resolution images for training, but it is infeasible to obtain precisely aligned paired clinical CT and μCT images. To solve this problem, we propose an unpaired SR approach that can perform SR on clinical CT to the μCT level. We modify a conventional image-to-image translation network named CycleGAN to an inter-modality translation network named SR-CycleGAN. The modifications consist of three parts: (1) an innovative loss function named multi-modality super-resolution loss, (2) optimized SR network structures for enlarging the input LR image to k2-times by width and height to obtain the SR output, and (3) sub-pixel shuffling layers for reducing computing time. Results: Experimental results demonstrated that our method successfully performed SR of lung clinical CT images. SSIM and PSNR scores of our method were 0.54 and 17.71, higher than the conventional CycleGAN’s scores of 0.05 and 13.64, respectively. Conclusions: The proposed SR-CycleGAN is usable for the SR of a lung clinical CT into μCT scale, while conventional CycleGAN output images with low qualitative and quantitative values. More lung micro-anatomy information could be observed to aid diagnosis, such as the shape of bronchioles walls.

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Proceedings Article | 4 April 2022 Presentation + Paper

Automated classification method of COVID-19 cases from chest CT volumes using 2D and 3D hybrid CNN for anisotropic volumes

Masahiro Oda, Tong Zheng, Yuichiro Hayashi, Yoshito Otake, Masahiro Hashimoto, Toshiaki Akashi, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12033, 1203309 (2022) https://doi.org/10.1117/12.2613317

KEYWORDS: Feature extraction, Chest, Computed tomography, Lung, Convolution, 3D image processing, Image processing, Image classification, CAD systems

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Proceedings Article | 4 April 2022 Poster + Presentation + Paper

Multi-class prediction for improving intestine segmentation on non-fecal-tagged CT volume

Hirohisa Oda, Yuichiro Hayashi, Takayuki Kitasaka, Aitaro Takimoto, Akinari Hinoki, Hiroo Uchida, Kojiro Suzuki, Masahiro Oda, Kensaku Mori

Proceedings Volume 12033, 120331J (2022) https://doi.org/10.1117/12.2611441

KEYWORDS: Intestine, Image segmentation, Computer aided diagnosis and therapy, Liquids, Computed tomography, Computer-aided diagnosis, Machine learning

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Proceedings Article | 4 April 2022 Presentation + Paper

Taking full advantage of uncertainty estimation: an uncertainty-assisted two-stage pipeline for multi-organ segmentation

Zhou Zheng, Masahiro Oda, Kazunari Misawa, Kensaku Mori

Proceedings Volume 12033, 120333M (2022) https://doi.org/10.1117/12.2612535

KEYWORDS: Image segmentation, Stomach, Spleen, Liver, Performance modeling, Visualization, Computed tomography, Uncertainty analysis, Biomedical optics, Monte Carlo methods

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Proceedings Article | 4 April 2022 Presentation + Paper

Spatial label smoothing via aleatoric uncertainty for bleeding region segmentation from laparoscopic videos

Jie Qiu, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Nobuyoshi Takeshita, Masaaki Ito, Kensaku Mori

Proceedings Volume 12032, 120320U (2022) https://doi.org/10.1117/12.2611672

KEYWORDS: Image segmentation, Laparoscopy, Image processing, Neural networks, Medical imaging

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Proceedings Article | 4 April 2022 Presentation + Paper

Coarse-to-fine cascade framework for cross-modality super-resolution on clinical/micro CT dataset

Tong Zheng, Hirohisa Oda, Yuichiro Hayashi, Shota Nakamura, Masaki Mori, Hirotsugu Takabatake, Hiroshi Natori, Masahiro Oda, Kensaku Mori

Proceedings Volume 12032, 120321T (2022) https://doi.org/10.1117/12.2611311

KEYWORDS: Computed tomography, Lawrencium, Medical imaging, Lung, Image registration, Super resolution, Computer programming, Feature extraction, Scanners, Lutetium

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Proceedings Article | 4 April 2022 Poster + Presentation + Paper

Substantia nigra analysis by tensor decomposition of T2-weighted images for Parkinson’s disease diagnosis

Hayato Itoh, Masahiro Oda, Shinji Saiki, Nobutaka Hattori, Koji Kamagata, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12032, 120323T (2022) https://doi.org/10.1117/12.2612830

KEYWORDS: Magnetic resonance imaging, Statistical analysis, Shape analysis, Feature extraction, Drug discovery, Brain, Analytical research, 3D image processing

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Proceedings Article | 4 April 2022 Poster + Paper

Size-reweighted cascaded fully convolutional network for substantia nigra segmentation from T2 MRI

Tao Hu, Hayato Itoh, Masahiro Oda, Shinji Saiki, Nobutaka Hattori, Koji Kamagata, Shigeki Aoki, Kensaku Mori

Proceedings Volume 12032, 120323K (2022) https://doi.org/10.1117/12.2613298

KEYWORDS: Image segmentation, Magnetic resonance imaging, Medical imaging, Convolution, Brain

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Proceedings Article | 4 April 2022 Presentation + Paper

Effective hyperparameter optimization with proxy data for multi-organ segmentation

Chen Shen, Holger Roth, Vishwesh Nath, Yuichiro Hayashi, Masahiro Oda, Kazunari Misawa, Kensaku Mori

Proceedings Volume 12032, 120320T (2022) https://doi.org/10.1117/12.2611422

KEYWORDS: Image segmentation, Data modeling, Network architectures, Convolution, Stomach, Spleen, Medical imaging, Computer aided design, Performance modeling, Optimization (mathematics)

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Proceedings Article | 4 April 2022 Paper

Real-time esophagus achalasia detection method for esophagoscopy assistance

Kai Jiang, Masahiro Oda, Hironari Shiwaku, Masashi Misawa, Kensaku Mori

Proceedings Volume 12033, 1203304 (2022) https://doi.org/10.1117/12.2613289

KEYWORDS: Video, CAD systems, Convolution, Esophagus, Endoscopy, Medical imaging, Image classification, Computer programming, Diagnostics

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Proceedings Article | 4 April 2022 Presentation + Paper

Bronchial orifice tracking-based branch level estimation for bronchoscopic navigation

Cheng Wang, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Hitotsugu Takabatake, Masaki Mori, Hirotoshi Honma, Hiroshi Natori, Kensaku Mori

Proceedings Volume 12034, 120340C (2022) https://doi.org/10.1117/12.2612827

KEYWORDS: Cameras, In vivo imaging, Navigation systems, Video, Computed tomography, Motion estimation, Image segmentation, 3D metrology, 3D image processing, Medicine

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Proceedings Article | 4 April 2022 Poster + Presentation + Paper

Self-supervised depth estimation with uncertainty-weight joint loss function based on laparoscopic videos

Wenda Li, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Kazunari Misawa, Kensaku Mori

Proceedings Volume 12034, 120342V (2022) https://doi.org/10.1117/12.2612829

KEYWORDS: Laparoscopy, Video, RGB color model, Computer programming, Lithium, Surgery, Information science, Image processing, Image analysis, Error analysis

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Proceedings Article | 20 April 2021 Paper

Unpaired medical image translation between portal-venous phase and non-contrast CT volumes for multi-organ segmentation

Chen Shen, Yuichiro Hayashi, Masahiro Oda, Kazunari Misawa, Kensaku Mori

Proceedings Volume 11792, 117920Q (2021) https://doi.org/10.1117/12.2590639

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Proceedings Article | 15 February 2021 Presentation + Paper

Single-shot three-dimensional reconstruction for colonoscopic image analysis

Hayato Itoh, Masahiro Oda, Yuichi Mori, Masashi Misawa, Shin-ei Kudo, Kinnichi Hotta, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Kensaku Mori

Proceedings Volume 11598, 115980E (2021) https://doi.org/10.1117/12.2582660

KEYWORDS: 3D image reconstruction, 3D image processing, Image analysis, Colon, CAD systems

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Proceedings Article | 15 February 2021 Poster + Presentation + Paper

Unsupervised segmentation of COVID-19 infected lung clinical CT volumes using image inpainting and representation learning

Tong Zheng, Masahiro Oda, Chenglong Wang, Takayasu Moriya, Yuichiro Hayashi, Yoshito Otake, Masahiro Hashimoto, Toshiaki Akashi, Masaki Mori, Hirotsugu Takabatake, Hiroshi Natori, Kensaku Mori

Proceedings Volume 11596, 115963F (2021) https://doi.org/10.1117/12.2580641

KEYWORDS: Image segmentation, Computed tomography, Chest, Arteries, Spherical lenses, Lung, Tissues, Opacity, Glasses

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Proceedings Article | 15 February 2021 Poster + Presentation + Paper

Extremely imbalanced subarachnoid hemorrhage detection based on DenseNet-LSTM network with class-balanced loss and transfer learning

Zhongyang Lu, Masahiro Oda, Yuichiro Hayashi, Tao Hu, Hayato Itoh, Takeyuki Watadani, Osamu Abe, Masahiro Hashimoto, Masahiro Jinzaki, Kensaku Mori

Proceedings Volume 11597, 115971Z (2021) https://doi.org/10.1117/12.2582088

KEYWORDS: Data modeling, Performance modeling, Computed tomography

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Proceedings Article | 15 February 2021 Presentation + Paper

Context encoder guided self-supervised siamese depth estimation based on stereo laparoscopic images

Wenda Li, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Kazunari Misawa, Kensaku Mori

Proceedings Volume 11598, 115980C (2021) https://doi.org/10.1117/12.2582348

KEYWORDS: Computer programming, Laparoscopy, Surgery, Convolution, Robotics, Robotic systems, Image restoration, Image analysis

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Proceedings Article | 15 February 2021 Poster + Presentation + Paper

Extraction of lung and lesion regions from COVID-19 CT volumes using 3D fully convolutional networks

Yuichiro Hayashi, Masahiro Oda, Chen Shen, Masahiro Hashimoto, Yoshito Otake, Toshiaki Akashi, Kensaku Mori

Proceedings Volume 11597, 115972A (2021) https://doi.org/10.1117/12.2581818

KEYWORDS: Lung, 3D modeling, Computed tomography, CAD systems, Medical imaging, Solid modeling, Image segmentation, Data modeling, Computer aided diagnosis and therapy

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Proceedings Article | 15 February 2021 Presentation + Paper

Bronchial orifice segmentation on bronchoscopic video frames based on generative adversarial depth estimation

Cheng Wang, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Hirotoshi Honma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Kensaku Mori

Proceedings Volume 11598, 115980N (2021) https://doi.org/10.1117/12.2582341

KEYWORDS: Video, Bronchoscopy, Image segmentation

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Proceedings Article | 15 February 2021 Presentation + Paper

Dense-layer-based YOLO-v3 for detection and localization of colon perforations

Kai Jiang, Hayato Itoh, Masahiro Oda, Taishi Okumura, Yuichi Mori, Masashi Misawa, Takemasa Hayashi, Shin-Ei Kudo, Kensaku Mori

Proceedings Volume 11597, 115971A (2021) https://doi.org/10.1117/12.2582300

KEYWORDS: Colon, Endoscopy, Video, Surgery, Oncology, Computing systems, Computer aided diagnosis and therapy, Cancer, Binary data

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Proceedings Article | 15 February 2021 Poster + Presentation + Paper

Lung infection and normal region segmentation from CT volumes of COVID-19 cases

Masahiro Oda, Yuichiro Hayashi, Yoshito Otake, Masahiro Hashimoto, Toshiaki Akashi, Kensaku Mori

Proceedings Volume 11597, 115972X (2021) https://doi.org/10.1117/12.2582066

KEYWORDS: Lung, Image segmentation, Computing systems, Quantitative analysis, Diagnostics, Chest

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Proceedings Article | 15 February 2021 Presentation + Paper

Intestinal region reconstruction of ileus cases from 3D CT images based on graphical representation and its visualization

Hirohisa Oda, Yuichiro Hayashi, Takayuki Kitasaka, Yudai Tamada, Aitaro Takimoto, Akinari Hinoki, Hiroo Uchida, Kojiro Suzuki, Hayato Itoh, Masahiro Oda, Kensaku Mori

Proceedings Volume 11597, 115971N (2021) https://doi.org/10.1117/12.2581261

KEYWORDS: Intestine, Computer aided diagnosis and therapy, Visualization, Image segmentation, Computing systems

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Proceedings Article | 16 March 2020 Presentation + Paper

Organ segmentation from full-size CT images using memory-efficient FCN

Chenglong Wang, Masahiro Oda, Kensaku Mori

Proceedings Volume 11314, 113140I (2020) https://doi.org/10.1117/12.2551024

KEYWORDS: Image segmentation, Computed tomography, Medical imaging, Convolution, Image processing, Network architectures, Machine vision, Computer vision technology, Information science, 3D vision

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Proceedings Article | 16 March 2020 Paper

Visualizing intestines for diagnostic assistance of ileus based on intestinal region segmentation from 3D CT images

Hirohisa Oda, Kohei Nishio, Takayuki Kitasaka, Hizuru Amano, Aitaro Takimoto, Hiroo Uchida, Kojiro Suzuki, Hayato Itoh, Masahiro Oda, Kensaku Mori

Proceedings Volume 11314, 1131434 (2020) https://doi.org/10.1117/12.2548910

KEYWORDS: Intestine, Image segmentation, Visualization, Computed tomography, Convolution, Diagnostics, 3D image processing, Human-machine interfaces, Virtual colonoscopy

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Proceedings Article | 16 March 2020 Paper

Visualising decision-reasoning regions in computer-aided pathological pattern diagnosis of endoscytoscopic images based on CNN weights analysis

Hayato Itoh, Zhongyang Lu, Yuichi Mori, Masashi Misawa, Masahiro Oda, Shin-ei Kudo, Kensaku Mori

Proceedings Volume 11314, 1131438 (2020) https://doi.org/10.1117/12.2549532

KEYWORDS: Visualization, Image classification, Visual analytics, Image filtering, Convolution, Data modeling, Solid modeling, Feature extraction, Medical research, RGB color model

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Proceedings Article | 16 March 2020 Presentation + Paper

Improved visual SLAM for bronchoscope tracking and registration with pre-operative CT images

Cheng Wang, Masahiro Oda, Yuichiro Hayashi, Takayuki Kitasaka, Hirotoshi Honma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Kensaku Mori

Proceedings Volume 11315, 1131518 (2020) https://doi.org/10.1117/12.2549949

KEYWORDS: Visualization, Computed tomography, Optical tracking, Cameras, Image registration, Bronchoscopy, Navigation systems, Video, Image segmentation, Information science

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Proceedings Article | 16 March 2020 Paper

Automated eye disease classification method from anterior eye image using anatomical structure focused image classification technique

Masahiro Oda, Takefumi Yamaguchi, Hideki Fukuoka, Yuta Ueno, Kensaku Mori

Proceedings Volume 11314, 1131446 (2020) https://doi.org/10.1117/12.2549951

KEYWORDS: Eye, Cornea, Image classification, Target detection, Image processing, Medical imaging, Ophthalmology, Information science, Medicine

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Proceedings Article | 16 March 2020 Paper

Usefulness of fine-tuning for deep learning based multi-organ regions segmentation method from non-contrast CT volumes using small training dataset

Yuichiro Hayashi, Chen Shen, Holger Roth, Masahiro Oda, Kazunari Misawa, Masahiro Jinzaki, Masahiro Hashimoto, Kanako Kumamaru, Shigeki Aoki, Kensaku Mori

Proceedings Volume 11314, 113143V (2020) https://doi.org/10.1117/12.2551022

KEYWORDS: 3D modeling, Image segmentation, Computed tomography, Stomach, Data modeling, Medical imaging, Arteries, Veins, Liver

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SPIE Journal Paper | 11 March 2020 Open Access

Cardiac fiber tracking on super high-resolution CT images: a comparative study

Hirohisa Oda, Holger Roth, Takaaki Sugino, Naoki Sunaguchi, Noriko Usami, Masahiro Oda, Daisuke Shimao, Shu Ichihara, Tetsuya Yuasa, Masami Ando, Toshiaki Akita, Yuji Narita, Kensaku Mori

JMI, Vol. 7, Issue 02, 026001, (March 2020) https://doi.org/10.1117/12.10.1117/1.JMI.7.2.026001

KEYWORDS: X-ray computed tomography, Computed tomography, Heart, X-rays, Statistical analysis, Visualization, Tissues, Structured optical fibers, Scanners, Bioalcohols

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Proceedings Article | 10 March 2020 Presentation + Paper

Spatial information-embedded fully convolutional networks for multi-organ segmentation with improved data augmentation and instance normalization

Chen Shen, Chenglong Wang, Holger Roth, Masahiro Oda, Yuichiro Hayashi, Kazunari Misawa, Kensaku Mori

Proceedings Volume 11313, 1131316 (2020) https://doi.org/10.1117/12.2550496

KEYWORDS: Image segmentation, Medical imaging, Pancreas, Computed tomography, Data corrections, Tissues, Veins, Gallbladder, 3D image processing, Network architectures

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Proceedings Article | 10 March 2020 Presentation + Paper

Multi-modality super-resolution loss for GAN-based super-resolution of clinical CT images using micro CT image database

Tong Zheng, Hirohisa Oda, Takayasu Moriya, Takaaki Sugino, Shota Nakamura, Masahiro Oda, Masaki Mori, Hirotsugu Takabatake, Hiroshi Natori, Kensaku Mori

Proceedings Volume 11313, 1131305 (2020) https://doi.org/10.1117/12.2548929

KEYWORDS: Computed tomography, Super resolution, Lung cancer, Lung, Lawrencium, Image resolution, Databases, Cancer, Information science, Image processing

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Proceedings Article | 27 March 2019 Paper

Investigation of extracting interlobular septa with Hessian analysis and radial structure tensor combined with roundness error in micro-CT volume

Xiaotian Zhao, Hirohisa Oda, Shota Nakamura, Yuichiro Hayashi, Hayato Itoh, Masahiro Oda, Kensaku Mori

Proceedings Volume 11050, 110501E (2019) https://doi.org/10.1117/12.2521646

KEYWORDS: Lung, Error analysis, Tissues, Lung cancer, Visualization, Blood vessels, Information science, Binary data, Nondestructive evaluation, Computed tomography

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Proceedings Article | 22 March 2019 Paper

Automated hand eye calibration in laparoscope holding robot for robot assisted surgery

Jiang Shuai, Yuichiro Hayashi, Cheng Wang, Masahiro Oda, Takayuki Kitasaka, Kazunari Misawa, Kensaku Mori

Proceedings Volume 11049, 1104949 (2019) https://doi.org/10.1117/12.2521618

KEYWORDS: Laparoscopy, Calibration, Eye, Cameras, Imaging systems, Surgery, Robotic systems, Robotics, Matrices, Information science

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Proceedings Article | 15 March 2019 Presentation + Paper

Scanning, registration, and fiber estimation of rabbit hearts using micro-focus and refraction-contrast x-ray CT

Hirohisa Oda, Holger Roth, Takaaki Sugino, Naoki Sunaguchi, Noriko Usami, Masahiro Oda, Daisuke Shimao, Shu Ichihara, Tetsuya Yuasa, Masami Ando, Toshiaki Akita, Yuji Narita, Kensaku Mori

Proceedings Volume 10953, 109531I (2019) https://doi.org/10.1117/12.2512145

KEYWORDS: Heart, X-ray computed tomography, X-ray imaging, Cardiac imaging, Imaging systems, 3D microstructuring, Cardiology, Phase contrast

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Proceedings Article | 15 March 2019 Presentation + Paper

Improving V-Nets for multi-class abdominal organ segmentation

Chen Shen, Fausto Milletari, Holger Roth, Hirohisa Oda, Masahiro Oda, Yuichiro Hayashi, Kazunari Misawa, Kensaku Mori

Proceedings Volume 10949, 109490B (2019) https://doi.org/10.1117/12.2512790

KEYWORDS: Image segmentation, 3D image processing, Data modeling, Medical imaging, Computed tomography, Image processing, Arteries, Veins, 3D modeling, Network architectures

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Proceedings Article | 15 March 2019 Presentation + Paper

Unsupervised segmentation of micro-CT images based on a hybrid of variational inference and adversarial learning

Takayasu Moriya, Holger Roth, Shota Nakamura, Hirohisa Oda, Masahiro Oda, Kensaku Mori

Proceedings Volume 10953, 109530L (2019) https://doi.org/10.1117/12.2513094

KEYWORDS: Image segmentation, Computer programming, Lung cancer, 3D image processing, Tissues, Feature extraction, Machine learning

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Proceedings Article | 13 March 2019 Presentation + Paper

Weakly-supervised deep learning of interstitial lung disease types on CT images

Chenglong Wang, Takayasu Moriya, Yuichiro Hayashi, Holger Roth, Le Lu, Masahiro Oda, Hirotugu Ohkubo, Kensaku Mori

Proceedings Volume 10950, 109501H (2019) https://doi.org/10.1117/12.2512746

KEYWORDS: Lung, Computed tomography, Image segmentation, Image classification, Spherical lenses, Convolutional neural networks, Computer aided diagnosis and therapy, Neural networks, Feature extraction, Machine learning

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Proceedings Article | 13 March 2019 Presentation + Paper

Polyp-size classification with RGB-D features for colonoscopy

Hayato Itoh, Holger Roth, Yuichi Mori, Masashi Misawa, Masahiro Oda, Shin-ei Kudo, Kensaku Mori

Proceedings Volume 10950, 1095015 (2019) https://doi.org/10.1117/12.2513093

KEYWORDS: Image classification, Video, Feature extraction, Medical research, Convolution, Machine learning, Colon, Information science

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Proceedings Article | 8 March 2019 Presentation + Paper

Colonoscope tracking method based on shape estimation network

Masahiro Oda, Holger Roth, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Nassir Navab, Kensaku Mori

Proceedings Volume 10951, 109510Q (2019) https://doi.org/10.1117/12.2512729

KEYWORDS: Colon, Sensors, Navigation systems, Rectum, Image sensors, Neural networks, Distance measurement, Information science, Convolution, Virtual colonoscopy

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Proceedings Article | 8 March 2019 Presentation + Paper

Visual SLAM for bronchoscope tracking and bronchus reconstruction in bronchoscopic navigation

Cheng Wang, Masahiro Oda, Yuichiro Hayashi, Takayuki Kitasaka, Hirotoshi Honma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Kensaku Mori

Proceedings Volume 10951, 109510A (2019) https://doi.org/10.1117/12.2512766

KEYWORDS: Cameras, Computed tomography, Image segmentation, Clouds, Navigation systems, Sensors, Video, Visualization, Optical tracking, In vivo imaging

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Proceedings Article | 20 March 2018 Paper

Develop and validate a finite element method model for deformation matching of laparoscopic gastrectomy navigation

Tao Chen, Guodong Wei, Weili Shi, Yuichiro Hayashi, Masahiro Oda, Zhengang Jiang, Guoxin Li, Kensaku Mori

Proceedings Volume 10576, 105761Y (2018) https://doi.org/10.1117/12.2293288

KEYWORDS: Finite element methods, Laparoscopy, Animal model studies, Computed tomography, Arteries, Surgery, 3D modeling, Navigation systems, Systems modeling, Image segmentation

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Proceedings Article | 13 March 2018 Presentation + Paper

Machine learning-based colon deformation estimation method for colonoscope tracking

Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Hidemi Goto, Nassir Navab, Kensaku Mori

Proceedings Volume 10576, 1057619 (2018) https://doi.org/10.1117/12.2293936

KEYWORDS: Magnetic sensors, Machine learning, Colon, Sensors, Navigation systems, Virtual colonoscopy, Distance measurement

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Proceedings Article | 12 March 2018 Paper

Unsupervised segmentation of 3D medical images based on clustering and deep representation learning

Takayasu Moriya, Holger Roth, Shota Nakamura, Hirohisa Oda, Kai Nagara, Masahiro Oda, Kensaku Mori

Proceedings Volume 10578, 1057820 (2018) https://doi.org/10.1117/12.2293414

KEYWORDS: Image segmentation, Medical imaging, 3D image processing, Machine learning, Tissues, 3D acquisition, Convolution, Lung cancer, Information science

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Proceedings Article | 12 March 2018 Presentation + Paper

Automatic segmentation of eyeball structures from micro-CT images based on sparse annotation

Takaaki Sugino, Holger Roth, Masahiro Oda, Seiji Omata, Shinya Sakuma, Fumihito Arai, Kensaku Mori

Proceedings Volume 10578, 105780V (2018) https://doi.org/10.1117/12.2293431

KEYWORDS: Image segmentation, Eye, Eye models, Data modeling, 3D modeling, Medical imaging, Image filtering, Visualization, Surgery, Databases

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Proceedings Article | 6 March 2018 Paper

Unsupervised pathology image segmentation using representation learning with spherical k-means

Takayasu Moriya, Holger Roth, Shota Nakamura, Hirohisa Oda, Kai Nagara, Masahiro Oda, Kensaku Mori

Proceedings Volume 10581, 1058111 (2018) https://doi.org/10.1117/12.2292172

KEYWORDS: Image segmentation, Pathology, Feature extraction, Lung cancer, Lung, Visualization, Image visualization, Machine learning

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Proceedings Article | 2 March 2018 Presentation + Paper

Towards dense volumetric pancreas segmentation in CT using 3D fully convolutional networks

Holger Roth, Masahiro Oda, Natsuki Shimizu, Hirohisa Oda, Yuichiro Hayashi, Takayuki Kitasaka, Michitaka Fujiwara, Kazunari Misawa, Kensaku Mori

Proceedings Volume 10574, 105740B (2018) https://doi.org/10.1117/12.2293499

KEYWORDS: Machine learning, Pancreas, Image segmentation, 3D image processing, Computed tomography, Image processing, 3D modeling, Network architectures, Convolution, Data modeling, Information science

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Proceedings Article | 2 March 2018 Presentation + Paper

Fine segmentation of tiny blood vessel based on full connected conditional random field

Chenglong Wang, Masahiro Oda, Yasushi Yoshino, Tokunori Yamamoto, Kensaku Mori

Proceedings Volume 10574, 105740K (2018) https://doi.org/10.1117/12.2293486

KEYWORDS: Blood vessels, Image segmentation, 3D modeling, Data modeling, Medical imaging, Selenium, 3D image processing, Statistical analysis, Arteries, Image processing

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Proceedings Article | 27 February 2018 Paper

Dense volumetric detection and segmentation of mediastinal lymph nodes in chest CT images

Hirohisa Oda, Holger Roth, Kanwal Bhatia, Masahiro Oda, Takayuki Kitasaka, Shingo Iwano, Hirotoshi Homma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Julia Schnabel, Kensaku Mori

Proceedings Volume 10575, 1057502 (2018) https://doi.org/10.1117/12.2287066

KEYWORDS: Lymphatic system, Image segmentation, Chest, Computed tomography, Lung, Lung cancer, Arteries, 3D image processing, Target detection

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Proceedings Article | 27 February 2018 Presentation + Paper

Cascade classification of endocytoscopic images of colorectal lesions for automated pathological diagnosis

Hayato Itoh, Yuichi Mori, Masashi Misawa, Masahiro Oda, Shin-ei Kudo, Kensaku Mori

Proceedings Volume 10575, 1057516 (2018) https://doi.org/10.1117/12.2293495

KEYWORDS: Image classification, Feature extraction, Endoscopy, Convolutional neural networks, Colorectal cancer, Information science, Endoscopes, Cancer, Biopsy, Astatine

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SPIE Journal Paper | 9 November 2017 Open Access

Automated mediastinal lymph node detection from CT volumes based on intensity targeted radial structure tensor analysis

Hirohisa Oda, Kanwal K. Bhatia, Masahiro Oda, Takayuki Kitasaka, Shingo Iwano, Hirotoshi Homma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Julia Schnabel, Kensaku Mori

JMI, Vol. 4, Issue 04, 044502, (November 2017) https://doi.org/10.1117/12.10.1117/1.JMI.4.4.044502

KEYWORDS: Lymphatic system, Target detection, Detection and tracking algorithms, Computed tomography, Optical spheres, Lung, Digital filtering, Image segmentation, Chest, Lung cancer

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Proceedings Article | 13 March 2017 Paper

Extraction of membrane structure in eyeball from MR volumes

Masahiro Oda, Taichi Kin, Kensaku Mori

Proceedings Volume 10137, 101371S (2017) https://doi.org/10.1117/12.2254095

KEYWORDS: Head, Image segmentation, Surgery, Tissues, Retina, Hough transforms, Optical coherence tomography, Digital filtering

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Proceedings Article | 13 March 2017 Presentation + Paper

Extracellular matrix directions estimation of the heart on micro-focus x-ray CT volumes

Hirohisa Oda, Masahiro Oda, Takayuki Kitasaka, Toshiaki Akita, Kensaku Mori

Proceedings Volume 10137, 101370M (2017) https://doi.org/10.1117/12.2254949

KEYWORDS: 3D microstructuring, Pathology, Heart, Cardiac imaging, Image segmentation, X-rays, Image processing, Visualization, Tissues, Diffusion, Computed tomography

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Proceedings Article | 3 March 2017 Paper

Airway extraction from 3D chest CT volumes based on iterative extension of VOI enhanced by cavity enhancement filter

Qier Meng, Takayuki Kitasaka, Masahiro Oda, Kensaku Mori

Proceedings Volume 10134, 101343S (2017) https://doi.org/10.1117/12.2254233

KEYWORDS: Image segmentation, Electronic filtering, Chest, Shape analysis, Lung cancer, Emphysema, Lung, Computed tomography, Image enhancement, Image filtering, Information science

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Proceedings Article | 3 March 2017 Presentation + Paper

Hessian-assisted supervoxel: structure-oriented voxel clustering and application to mediastinal lymph node detection from CT volumes

Hirohisa Oda, Kanwal Bhatia, Masahiro Oda, Takayuki Kitasaka, Shingo Iwano, Hirotoshi Homma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Julia Schnabel, Kensaku Mori

Proceedings Volume 10134, 101341D (2017) https://doi.org/10.1117/12.2254782

KEYWORDS: Lymphatic system, Image segmentation, Feature extraction, Chest, Computer-aided diagnosis, Lung cancer, Lung, Image processing algorithms and systems, Blood vessels, Esophagus, Target detection, Information science, Computer aided diagnosis and therapy

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Proceedings Article | 24 March 2016 Paper

Intensity targeted radial structure tensor analysis and its application for automated mediastinal lymph node detection from CT volumes

Hirohisa Oda, Yukitaka Nimura, Masahiro Oda, Takayuki Kitasaka, Shingo Iwano, Hirotoshi Honma, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Kensaku Mori

Proceedings Volume 9785, 97850E (2016) https://doi.org/10.1117/12.2216663

KEYWORDS: Lymphatic system, Target detection, Machine learning, Computer aided diagnosis and therapy, Lung cancer, Chest, Image filtering, Optical spheres, Solids, Tissues, Image segmentation, Binary data

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Proceedings Article | 24 March 2016 Paper

Ensemble lymph node detection from CT volumes combining local intensity structure analysis approach and appearance learning approach

Yoshihiko Nakamura, Yukitaka Nimura, Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa, Hidemi Goto, Michitaka Fujiwara, Kazunari Misawa, Kensaku Mori

Proceedings Volume 9785, 97852X (2016) https://doi.org/10.1117/12.2214925

KEYWORDS: Lymphatic system, Analytical research, Detector development, Cancer, Surgery, Machine learning, Feature extraction, Computed tomography, Medical research, Target detection, Computer science, Computer engineering, Information science, Image segmentation

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Proceedings Article | 21 March 2016 Paper

Precise renal artery segmentation for estimation of renal vascular dominant regions

Chenglong Wang, Mitsuru Kagajo, Yoshihiko Nakamura, Masahiro Oda, Yasushi Yoshino, Tokunori Yamamoto, Kensaku Mori

Proceedings Volume 9784, 97842M (2016) https://doi.org/10.1117/12.2217492

KEYWORDS: Image segmentation, Arteries, Blood vessels, Diagnostics, Kidney, Surgery, Blood, Detection and tracking algorithms, Performance modeling, Image analysis, Gold, Distance measurement, Mathematical modeling, 3D image enhancement, 3D modeling, Tumors

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Proceedings Article | 21 March 2016 Paper

Accurate airway segmentation based on intensity structure analysis and graph-cut

Qier Meng, Takayuki Kitsaka, Yukitaka Nimura, Masahiro Oda, Kensaku Mori

Proceedings Volume 9784, 97842G (2016) https://doi.org/10.1117/12.2216670

KEYWORDS: Machine learning, Analytical research, Chest, Electronic filtering, Image segmentation, Lung cancer, Emphysema, Lung, Pattern recognition, Computed tomography, Computer aided diagnosis and therapy, Feature extraction, Information science

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Proceedings Article | 18 March 2016 Paper

Position-based adjustment of landmark-based correspondence finding in electromagnetic sensor-based colonoscope tracking method

Masahiro Oda, Hiroaki Kondo, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Hidemi Goto, Nassir Navab, Kensaku Mori

Proceedings Volume 9786, 97861D (2016) https://doi.org/10.1117/12.2216371

KEYWORDS: Colon, Sensors, Endoscopy, Navigation systems, Error analysis, Computer aided diagnosis and therapy, Lithium, Information science, Diagnostics, Computing systems

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SPIE Journal Paper | 17 December 2015

Pneumoperitoneum simulation based on mass-spring-damper models for laparoscopic surgical planning

Yukitaka Nimura, Jia Di Qu, Yuichiro Hayashi, Masahiro Oda, Takayuki Kitasaka, Makoto Hashizume, Kazunari Misawa, Kensaku Mori

JMI, Vol. 2, Issue 04, 044004, (December 2015) https://doi.org/10.1117/12.10.1117/1.JMI.2.4.044004

KEYWORDS: Tissues, Laparoscopy, Surgery, Error analysis, Image segmentation, Carbon monoxide, Motion models, Image processing, Computed tomography, Visualization

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Proceedings Article | 8 May 2015 Paper

Automated branching pattern report generation for laparoscopic surgery assistance

Masahiro Oda, Tetsuro Matsuzaki, Yuichiro Hayashi, Takayuki Kitasaka, Kazunari Misawa, Kensaku Mori

Proceedings Volume 9414, 94141T (2015) https://doi.org/10.1117/12.2082488

KEYWORDS: Blood vessels, Arteries, Surgery, Diagnostics, Adaptive optics, Veins, Laparoscopy, Photovoltaics, Stomach, Cameras

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Proceedings Article | 20 March 2015 Paper

Pancreas segmentation from 3D abdominal CT images using patient-specific weighted subspatial probabilistic atlases

Kenichi Karasawa, Masahiro Oda, Yuichiro Hayashi, Yukitaka Nimura, Takayuki Kitasaka, Kazunari Misawa, Michitaka Fujiwara, Daniel Rueckert, Kensaku Mori

Proceedings Volume 9413, 94131A (2015) https://doi.org/10.1117/12.2081756

KEYWORDS: Pancreas, Image segmentation, Liver, 3D image processing, Computed tomography, Surgery, Gold, Image registration, Computer aided diagnosis and therapy, Computing systems

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Proceedings Article | 20 March 2015 Paper

Connection method of separated luminal regions of intestine from CT volumes

Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa, Osamu Watanabe, Takafumi Ando, Yoshiki Hirooka, Hidemi Goto, Kensaku Mori

Proceedings Volume 9414, 94140P (2015) https://doi.org/10.1117/12.2081977

KEYWORDS: Intestine, Image segmentation, Computed tomography, Magnetic resonance imaging, CAD systems, Endoscopy, Rectum, Endoscopes, Diagnostics, Stomach

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Proceedings Article | 21 March 2014 Paper

Development of automated extraction method of biliary tract from abdominal CT volumes based on local intensity structure analysis

Kusuto Koga, Yuichiro Hayashi, Tomoaki Hirose, Masahiro Oda, Takayuki Kitasaka, Tsuyoshi Igami, Masato Nagino, Kensaku Mori

Proceedings Volume 9034, 903448 (2014) https://doi.org/10.1117/12.2043347

KEYWORDS: Image processing, Computed tomography, Surgery, Linear filtering, Liver, Image segmentation, Tissues, Digital filtering, Computing systems, Medical imaging

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Proceedings Article | 12 March 2014 Paper

Colonoscope navigation system using colonoscope tracking method based on line registration

Masahiro Oda, Hiroaki Kondo, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Hidemi Goto, Nassir Navab, Kensaku Mori

Proceedings Volume 9036, 903626 (2014) https://doi.org/10.1117/12.2043426

KEYWORDS: Colon, Navigation systems, Sensors, Virtual colonoscopy, Endoscopes, Computed tomography, Detection and tracking algorithms, Endoscopy, Diagnostics, Control systems

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Proceedings Article | 13 March 2013 Paper

Multi-organ segmentation from 3D abdominal CT images using patient-specific weighted-probabilistic atlas

Chengwen Chu, Masahiro Oda, Takayuki Kitasaka, Kazunari Misawa, Michitaka Fujiwara, Yuichiro Hayashi, Robin Wolz, Daniel Rueckert, Kensaku Mori

Proceedings Volume 8669, 86693Y (2013) https://doi.org/10.1117/12.2007601

KEYWORDS: Image segmentation, Pancreas, Liver, Databases, Kidney, Image processing, Spleen, Computed tomography, Expectation maximization algorithms, 3D image processing

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Proceedings Article | 13 March 2013 Paper

A method for automated anatomical labeling of abdominal veins extracted from 3D CT images

Tetsuro Matsuzaki, Masahiro Oda, Takayuki Kitasaka, Yuichiro Hayashi, Kazunaru Misawa, Kensaku Mori

Proceedings Volume 8669, 86691Y (2013) https://doi.org/10.1117/12.2006745

KEYWORDS: Veins, Photovoltaics, Blood vessels, Machine learning, Surgery, Computed tomography, 3D image processing, Computing systems, Rule based systems, Arteries

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Proceedings Article | 28 February 2013 Paper

Supine and prone registration of the colon for CT colonography based on dynamic programming technique

Masahiro Oda, Eiichiro Fukano, Takayuki Kitasaka, Tetsuji Takayama, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Shigeru Nawano, Kensaku Mori

Proceedings Volume 8670, 86702B (2013) https://doi.org/10.1117/12.2007562

KEYWORDS: Colon, Computed tomography, Image registration, Virtual colonoscopy, Computer programming, 3D image processing, CAD systems, Laser sintering, Computer aided diagnosis and therapy, Information science

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Proceedings Article | 23 February 2012 Paper

Automated incision line determination for virtual unfolded view generation of the stomach from 3D abdominal CT images

Tomoaki Suito, Masahiro Oda, Takayuki Kitasaka, Gen Iinuma, Kazunari Misawa, Shigeru Nawano, Kensaku Mori

Proceedings Volume 8315, 83151M (2012) https://doi.org/10.1117/12.911409

KEYWORDS: Stomach, 3D image processing, Computed tomography, Endoscopy, Cancer, Image processing, X-ray computed tomography, Computing systems, Information science, Pathology

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Proceedings Article | 17 February 2012 Paper

Evaluation of deformation accuracy of a virtual pneumoperitoneum method based on clinical trials for patient-specific laparoscopic surgery simulator

Masahiro Oda, Jia Di Qu, Yukitaka Nimura, Takayuki Kitasaka, Kazunari Misawa, Kensaku Mori

Proceedings Volume 8316, 83160G (2012) https://doi.org/10.1117/12.911701

KEYWORDS: 3D image processing, Surgery, Computed tomography, Laparoscopy, Image processing, 3D metrology, Computer simulations, Clinical trials, 3D modeling, Optical tracking

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This paper evaluates deformation accuracy of a virtual pneumoperitoneum method by utilizing measurement data of real deformations of patient bodies. Laparoscopic surgery is an option of surgical operations that is less invasive technique as compared with traditional surgical operations. In laparoscopic surgery, the pneumoperitoneum process is performed to create a viewing and working space. Although a virtual pneumoperitoneum method based on 3D CT image deformation has been proposed for patient-specific laparoscopy simulators, quantitative evaluation based on measurements obtained in real surgery has not been performed. In this paper, we evaluate deformation accuracy of the virtual pneumoperitoneum method based on real deformation data of the abdominal wall measured in operating rooms (ORs.) The evaluation results are used to find optimal deformation parameters of the virtual pneumoperitoneum method. We measure landmark positions on the abdominal wall on a 3D CT image taken before performing a pneumoperitoneum process. The landmark positions are defined based on anatomical structure of a patient body. We also measure the landmark positions on a 3D CT image deformed by the virtual pneumoperitoneum method. To measure real deformations of the abdominal wall, we measure the landmark positions on the abdominal wall of a patient before and after the pneumoperitoneum process in the OR. We transform the landmark positions measured in the OR from the tracker coordinate system to the CT coordinate system. A positional error of the virtual pneumoperitoneum method is calculated based on positional differences between the landmark positions on the 3D CT image and the transformed landmark positions. Experimental results based on eight cases of surgeries showed that the minimal positional error was 13.8 mm. The positional error can be decreased from the previous method by calculating optimal deformation parameters of the virtual pneumoperitoneum method from the experimental results.

Proceedings Article | 14 February 2012 Paper

Automated anatomical labeling method for abdominal arteries extracted from 3D abdominal CT images

Masahiro Oda, Bui Huy Hoang, Takayuki Kitasaka, Kazunari Misawa, Michitaka Fujiwara, Kensaku Mori

Proceedings Volume 8314, 83142F (2012) https://doi.org/10.1117/12.911685

KEYWORDS: Arteries, Computed tomography, Blood vessels, 3D image processing, Medical imaging, Image processing, Current controlled current source, Adaptive optics, Shape memory alloys, Surgery

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Proceedings Article | 15 March 2011 Paper

A study on automated anatomical labeling to arteries concerning with colon from 3D abdominal CT images

Bui Huy Hoang, Masahiro Oda, Zhengang Jiang, Takayuki Kitasaka, Kazunari Misawa, Michitaka Fujiwara, Kensaku Mori

Proceedings Volume 7962, 79623R (2011) https://doi.org/10.1117/12.878681

KEYWORDS: Arteries, 3D image processing, Computed tomography, Colon, Surgery, Computing systems, 3D acquisition, Medical imaging, Image processing, Current controlled current source

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Proceedings Article | 9 March 2011 Paper

Detection of longitudinal ulcer using roughness value for computer aided diagnosis of Crohn's disease

Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa, Osamu Watanabe, Takafumi Ando, Hidemi Goto, Kensaku Mori

Proceedings Volume 7963, 79631E (2011) https://doi.org/10.1117/12.877507

KEYWORDS: Computer aided diagnosis and therapy, Intestine, Computed tomography, Endoscopes, Medical imaging, Current controlled current source, Computing systems

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Proceedings Article | 9 March 2010 Paper

Haustral fold registration in CT colonography and its application to registration of virtual stretched view of the colon

Eiichiro Fukano, Masahiro Oda, Takayuki Kitasaka, Yasuhito Suenaga, Tetsuji Takayama, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Shigeru Nawano, Kensaku Mori

Proceedings Volume 7624, 762420 (2010) https://doi.org/10.1117/12.844600

KEYWORDS: Colon, Virtual colonoscopy, Medical imaging, Computer aided diagnosis and therapy, Current controlled current source

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Proceedings Article | 9 March 2010 Paper

Development of CAD prototype system for Crohn's disease

Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa, Osamu Watanabe, Takafumi Ando, Hidemi Goto, Kensaku Mori

Proceedings Volume 7624, 76241U (2010) https://doi.org/10.1117/12.844590

KEYWORDS: Intestine, CAD systems, X-ray computed tomography, Computed tomography, Virtual colonoscopy, Computer aided diagnosis and therapy, Endoscopes, Endoscopy, X-rays, Prototyping

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Proceedings Article | 3 March 2009 Paper

Haustral fold detection method for CT colonography based on difference filter along colon centerline

Masahiro Oda, Takayuki Kitasaka, Kensaku Mori, Yasuhito Suenaga, Tetsuji Takayama, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Shigeru Nawano

Proceedings Volume 7260, 72602M (2009) https://doi.org/10.1117/12.812403

KEYWORDS: Colon, Computed tomography, Virtual colonoscopy, X-ray computed tomography, 3D image processing, Image registration, Ridge detection, Medical research, Computer aided diagnosis and therapy, Information science

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Proceedings Article | 27 March 2008 Paper

Digital bowel cleansing free detection method of colonic polyp from fecal tagging CT images

Masahiro Oda, Takayuki Kitasaka, Kensaku Mori, Yasuhito Suenaga, Tetsuji Takayama, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Shigeru Nawano

Proceedings Volume 6915, 69152H (2008) https://doi.org/10.1117/12.771580

KEYWORDS: Computed tomography, Virtual colonoscopy, Colon, Image processing, 3D image processing, Inspection, Cancer, Natural surfaces, Image enhancement, Tissues

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Proceedings Article | 12 March 2008 Paper

Extraction of teniae coli from CT volumes for assisting virtual colonoscopy

Yuuki Umemoto, Masahiro Oda, Takayuki Kitasaka, Kensaku Mori, Yuichiro Hayashi, Yasuhito Suenaga, Tetsuji Takayama, Hiroshi Natori

Proceedings Volume 6916, 69160D (2008) https://doi.org/10.1117/12.773105

KEYWORDS: Virtual colonoscopy, Colon, Medical imaging, Physiology, Rectum, Diagnostics

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Proceedings Article | 30 March 2007 Paper

A new method for detecting colonic polyps based on local intensity structure analysis from 3D abdominal CT images

Masahiro Oda, Yuichi Nakada, Takayuki Kitasaka, Kensaku Mori, Yasuhito Suenaga, Tetsuji Takayama, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori, Shigeru Nawano

Proceedings Volume 6514, 65142L (2007) https://doi.org/10.1117/12.709153

KEYWORDS: Computed tomography, Virtual colonoscopy, 3D image processing, Colon, Image enhancement, Diagnostics, Cancer, X-ray computed tomography, Image filtering, Blob detection

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Proceedings Article | 13 March 2006 Paper

A method for generating virtual unfolded view of colon using spring model

Masahiro Oda, Yuichiro Hayashi, Takayuki Kitasaka, Kensaku Mori, Yasuhito Suenaga

Proceedings Volume 6143, 61431C (2006) https://doi.org/10.1117/12.654816

KEYWORDS: Colon, Virtual colonoscopy, Inspection, Volume rendering, 3D image processing, X-ray computed tomography, Cancer, Computed tomography, Diagnostics, Computer aided diagnosis and therapy

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