Faculty Profiles - MORI, Kensaku

Papers - MORI, Kensaku

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

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

Proc. SPIE 11596, Medical Imaging, 2021: Image Processing page： 115963F-1 - 6 2021.2

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

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

Proc.SPIE 11597, Medical Imaging 2021: Computer-Aided Diagnosis page： 115972A-1 - 6 2021.2

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

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

Proceedings Volume 11597, Medical Imaging 2021: Computer-Aided Diagnosis page： 115971Z 2021.2

Single-shot three-dimensional reconstruction for colonoscopic image analysis Reviewed

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

Proc. SPIE 11598, Medical Imaging 2021: Image-Guided Procedures, Robotic Interventions, and Modeling page： 115980E-1 - 6 2021.2

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

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

Proc.SPIE 11597, Medical Imaging 2021: Computer-Aided Diagnosis 2021.2

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

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

Proc. SPIE 11597, Medical Imaging 2021: Computer-Aided Diagnosis page： 115972X-1 - 6 2021.2

人工知能（AI）最新動向　AI研究から見たRSNA-AIの広がりを感じる大会 Invited

森健策

インナービジョン Vol. 36 ( 2 ) page： 25 - 26 2021.2

CT画像XAI技術で「新型コロナウィルス肺炎」を85%精度で識別

小田昌宏, 森健策

C-press Vol. 120 page： 5 - 6 2021.2

COVID-19診断支援AI開発における名古屋大学の取り組み

小田昌宏, 鄭通, 林雄一郎, 森健策

Vol. 39 ( 1 ) page： 13 - 19 2021.2

New method for the assessment of perineural invasion from perihilar cholangiocarcinoma Reviewed

Hiroshi Tanaka, Tsuyoshi Igami, Yoshie Shimoyama, Tomoki Ebata, Yukihiro Yokoyama, Kensaku Mori, Masato Nagino,

Surgery Today Vol. 51 ( 2 ) page： 136 - 143 2021.1

Current status and future perspective on artificial intelligence for lower endoscopy. Invited International journal

Masashi Misawa, Shin-Ei Kudo, Yuichi Mori, Yasuharu Maeda, Yushi Ogawa, Katsuro Ichimasa, Toyoki Kudo, Kunihiko Wakamura, Takemasa Hayashi, Hideyuki Miyachi, Toshiyuki Baba, Fumio Ishida, Hayato Itoh, Masahiro Oda, Kensaku Mori

Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society Vol. 33 ( 2 ) page： 273 - 284 2021.1

Language：Japanese Publishing type：Research paper (scientific journal)

The global incidence and mortality rate of colorectal cancer remains high. Colonoscopy is regarded as the gold standard examination for detecting and eradicating neoplastic lesions. However, there are some uncertainties in colonoscopy practice that are related to limitations in human performance. First, approximately one-fourth of colorectal neoplasms are missed on a single colonoscopy. Second, it is still difficult for non-experts to perform adequately regarding optical biopsy. Third, recording of some quality indicators (e.g. cecal intubation, bowel preparation, and withdrawal speed) which are related to adenoma detection rate, is sometimes incomplete. With recent improvements in machine learning techniques and advances in computer performance, artificial intelligence-assisted computer-aided diagnosis is being increasingly utilized by endoscopists. In particular, the emergence of deep-learning, data-driven machine learning techniques have made the development of computer-aided systems easier than that of conventional machine learning techniques, the former currently being considered the standard artificial intelligence engine of computer-aided diagnosis by colonoscopy. To date, computer-aided detection systems seem to have improved the rate of detection of neoplasms. Additionally, computer-aided characterization systems may have the potential to improve diagnostic accuracy in real-time clinical practice. Furthermore, some artificial intelligence-assisted systems that aim to improve the quality of colonoscopy have been reported. The implementation of computer-aided system clinical practice may provide additional benefits such as helping in educational poorly performing endoscopists and supporting real-time clinical decision-making. In this review, we have focused on computer-aided diagnosis during colonoscopy reported by gastroenterologists and discussed its status, limitations, and future prospects.

DOI： 10.1111/den.13847

Web of Science

Scopus

PubMed

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

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

Medical Imaging 2021: Computer-Aided Diagnosis Vol. 11597 page： 115971A-1 - 6 2021

Robust endocytoscopic image classification based on higher-order symmetric tensor analysis and multi-scale topological statistics. Invited Reviewed International journal

Hayato Itoh, Yukitaka Nimura, Yuichi Mori, Masashi Misawa, Shin-Ei Kudo, Kinichi Hotta, Kazuo Ohtsuka, Shoichi Saito, Yutaka Saito, Hiroaki Ikematsu, Yuichiro Hayashi, Masahiro Oda, Kensaku Mori

International journal of computer assisted radiology and surgery Vol. 15 ( 12 ) page： 2049 - 2059 2020.12

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: An endocytoscope is a new type of endoscope that enables users to perform conventional endoscopic observation and ultramagnified observation at the cell level. Although endocytoscopy is expected to improve the cost-effectiveness of colonoscopy, endocytoscopic image diagnosis requires much knowledge and high-level experience for physicians. To circumvent this difficulty, we developed a robust endocytoscopic (EC) image classification method for the construction of a computer-aided diagnosis (CAD) system, since real-time CAD can resolve accuracy issues and reduce interobserver variability. METHOD: We propose a novel feature extraction method by introducing higher-order symmetric tensor analysis to the computation of multi-scale topological statistics on an image, and we integrate this feature extraction with EC image classification. We experimentally evaluate the classification accuracy of our proposed method by comparing it with three deep learning methods. We conducted this comparison by using our large-scale multi-hospital dataset of about 55,000 images of over 3800 patients. RESULTS: Our proposed method achieved an average 90% classification accuracy for all the images in four hospitals even though the best deep learning method achieved 95% classification accuracy for images in only one hospital. In the case with a rejection option, the proposed method achieved expert-level accurate classification. These results demonstrate the robustness of our proposed method against pit pattern variations, including differences of colours, contrasts, shapes, and hospitals. CONCLUSIONS: We developed a robust EC image classification method with novel feature extraction. This method is useful for the construction of a practical CAD system, since it has sufficient generalisation ability.

DOI： 10.1007/s11548-020-02255-3

Web of Science

Scopus

PubMed

[総論]AI時代を見据えた消化器外科手術 AIによる大腸T2癌リンパ節転移予測 Invited Reviewed

中原健太, 石田文生, 一政克朗, 森悠一, 三澤将史, 澤田成彦, 工藤進英, Villard Ben, 伊東隼人, 森健策

日本消化器外科学会総会 Vol. 75回 page： WS15 - 6 2020.12

Improving contrast and spatial resolution in crystal analyzer based x ray dark field imaging Reviewed

Masami Ando Yuki Nakao Ge Jin Hiroshi Sugiyama Naoki Sunaguchi Yongjin Sung Yoshifumi Suzuki Yong Sun Michio Tanimoto Katsuhiro Kawashima Tetsuya Yuasa Kensaku Mori Shu Ichihara Rajiv Gupta,

Medical Physics Vol. 47 ( 11 ) page： 5505 - 5513 2020.11

多元計算解剖モデルと人工知能に基づく診断治療支援 Invited Reviewed

森　健策

映像情報メディア学会誌 Vol. 74 ( 6 ) page： 909-915 2020.11

腹腔鏡動画像用オンラインアノテーションツールの開発

屠芸豪, 伊東隼人，小澤卓也，小田昌宏, 竹下修由，伊藤雅昭，森健策

日本コンピュータ外科学会誌第29回日本コンピュータ外科学会大会特集号 Vol. 22 ( 4 ) page： 306 - 307 2020.11

呼吸器外科における仮想胸腔鏡像による手術ナビゲーションシステムを用いた手術支援の検討

林雄一郎, 中村彰太，森健策

日本コンピュータ外科学会誌第29回日本コンピュータ外科学会大会特集号 Vol. 22 ( 4 ) page： 337 2020.11

気管支鏡ナビゲーションのための敵対的生成による内視鏡画像深度推定の評価

王成, 小田昌宏，林雄一郎，北坂孝幸，本間裕敏，高畠博嗣，森雅樹，名取博, 森　健策

日本コンピュータ外科学会誌第29回日本コンピュータ外科学会大会特集号 Vol. 22 ( 4 ) page： 338 - 339 2020.11

SUN database : 大腸ポリープ自動検出器の精度評価に向けた試験用画像

伊東隼人, 三澤将史，森悠一，小田　昌宏，工藤　進英, 森健策

日本コンピュータ外科学会誌第29回日本コンピュータ外科学会大会特集号 Vol. 22 ( 4 ) page： 346 - 347 2020.11

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Papers - MORI, Kensaku