AI Arteriosclerosis Diagnosis System Using RLHF and Adversarial Attack: Quantitative Evaluation of IMT Extraction Robustness by Adversarial Learning
Usami, Hiroyasu
Journal of Comprehensive Engineering, 2026
Vol. 38, pp. 1-11
Department of Computer Science, College of Engineering, Chubu University
Usami Laboratory
Understanding the world from images
We study image processing, computer vision, and machine learning, with applications in medicine, manufacturing, social infrastructure, and real-world sensing.
Research Areas
Our work connects principles and applications: from physics- and mathematics-based image understanding to systems for medical, industrial, and social problems.
Theme 01
Medical Image Analysis, 3D Shape Reconstruction, and Diagnostic Support
Research on lesion detection, segmentation, 3D shape reconstruction, quantitative measurement, and diagnostic support using endoscopy, CT, cellular, and pathological images.
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Theme 02
Physics-based Vision
Research on estimating shape, material, reflectance, and illumination from images by modeling reflection, transmission, scattering, and other optical phenomena.
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Theme 03
Real-world Sensing and Spatiotemporal Modeling
Research on extracting temporal and spatial structure from videos and sensor data for action recognition, forecasting, and anomaly detection.
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Theme 04
Generative AI, Learning Support, and Validation
Research on generative models, learning support, data augmentation, automatic question generation, and validation of generated outputs.
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Selected Publications
Bulletin
Anatomy-Preserving Diffusion-Based Data Augmentation for Medical Image Segmentation
Tominari, Hiroki, Nakayama, Natsuki, Arakawa, Naoko, Usami, Hiroyasu
Proceedings of the 19th International Joint Conference on Biomedical Engineering Systems and Technologies -- BIOIMAGING, 2026
BIOIMAGING 2026
O(V) Computational Optimization and Physics-informed STGNN for Building IoT Simulation
Tajima, Koichiro, Usami, Hiroyasu
IEICE Technical Report, 2026
EST2025-95, 2026-01-23
News
Recent presentations, publications, awards, invited talks, academic service, outreach, and laboratory activities.
2026.06.04
PublicationMedical Imaging
A paper on an AI arteriosclerosis diagnosis system was published in Journal of Comprehensive Engineering
A paper on an AI arteriosclerosis diagnosis system using RLHF and adversarial attack was published in Vol. 38 of Journal of Comprehensive Engineering. The study evaluates the robustness of IMT extraction from carotid ultrasound images under adversarial perturbations, focusing on whether attention remains on physician-relevant structures.
2026.04.01
Academic ServiceIPSJ
Hiroyasu Usami became a representative member of the Information Processing Society of Japan
Hiroyasu Usami became a representative member of the Information Processing Society of Japan for fiscal year 2026. He also serves the IPSJ Tokai Branch as an operating committee member and secretary, and is an IPSJ senior member.
2026.03.07
OutreachEducation
Served as a poster judge for the 8th Junior and Senior High School Informatics Research Contest
Hiroyasu Usami served as a judge for informatics research poster presentations by junior and senior high school students, supporting exploratory research and education in informatics.
People
Faculty, graduate students, and undergraduate students work together across computer vision, machine learning, and applied image analysis.
1
Faculty
25
Current Students
21
Alumni
Selected Career Paths
Companies are listed in Japanese alphabetical order.
- AISIN Digital Engineering Co., Ltd.
- Aiphone Co., Ltd.
- ARGO GRAPHICS Inc.
- Enshu Limited
- Gothic Co., Ltd.
- Common Products Co., Ltd.
- C-Cube Co., Ltd.
- J:COM Co., Ltd.
- JBCC Corporation
- Sumitomo Riko Company Limited
- TechPresso Inc.
- DIC Solution Engineering Co., Ltd.
- Nodajuku Co., Ltd.
Graduate study: Chubu University Graduate School
For Prospective Students
Students interested in image processing, computer vision, machine learning, and AI are welcome to contact us.
For Research Collaboration
We welcome collaboration with companies and research institutions on image analysis, computer vision, and machine learning.