Chikayoshi Sumi received the B.E, M.E., and D.E. degrees from the Department of Electrical and Electronics Engineering, Sophia University, Tokyo, Japan, in 1991, 1993, and 1996, respectively. From 1996 to 1998, he was a research fellow of the Japan Society for the Promotion of Science and a research associate at Sophia University. In 1997, he was with the Bioacoustics Research Laboratory at the University of Illinois at Urbana-Champaign as a visiting scholar. He started to work at Sophia University as a lecturer, and he currently is an associate professor at the Department of Information and Communication Sciences. His research interests include medical ultrasound, elasticity imaging, non- invasive treatment, biological signal processing, and inverse problems etc. He is a senior member of the IEEE, and members of the Japan Society of Ultrasonics in Medicine, the Japan Society of Medical Electronics and Biological Engineering, the Institute of Electronics, Information and Communications Engineers of Japan, and the Institute of Electrical Engineers of Japan. He currently is editorial boards of Journal of Reports in Medical Imaging, Journal of Medical Engineering, and International Journal of Biomedical Imaging.(Subject of research)
Differential Diagnosis of cancer by measurement of elastic and visco-elastic modulus from ultrasonic and MR strain measurements
Measurement of electromagnetic parameter distribution from magnetic field measurements (MR, SQUID etc)
Reconstruction of thermal parameter distribution from temperature measurement (MR, infra-red, ultrasound, pyroelectricity etc.)
Thermal treatment of cancer utilizing HIFU(High Intensity Focus Ultrasound) and electromagnetic wave(Proposed theme of joint or funded research)
Measurement of elastic and visco-elastic modulus distribution in soft tissue from ultrasonic, MR and OCT strain measurements
Measurement of electromagnetic parameter distribution from magnetic field measurement(MR, SQUID etc.)
Measurement of thermal parameter distribution from　temperature measurement (infra-red, MR, ultrasound)

博士（工学）(上智大学)

sonar, rader, coherent signal processing, OCT, electromagnetic wave, permeability, Magnetic field,  MR, SQUID measurement, permittivity, conductivity, thermal treatment (hyperthermia), ultrasonic and MR measurements,  cancer, thermal conductivily, thermal diffusivity, thermal capacity, displacement vector, strain tensor,  visco elastic modulus, shear modulus, visco-shear modulus, temperature, Ultrasound, MR, Infra-red, HIFU(High Intensity Focus Ultrasound), environmental measurement, 計測システム工学: 非破壊計測, in situ計測, 省エネ, システム工学: 線形・非線形システム, 可視化工学: 可視化技術（アナログ/デジタル）, 逆フィルタリング（超解像，ボケ画像復元）, 動きベクトル(コヒーレント信号処理)，画像計測, 通信・ネットワーク工学: 通信, 信号応用，媒体特性計測 ,inverse problem, 医用画像: 超音波, 核磁気共鳴/電磁気，赤外線/テラヘルツ/OCT, 医用システム: 医療（診断/治療）トータルシステム，非・低侵襲/非観血, 医用生体工学・生体材料学: 医療(3大疾患の診断と治療), 医用画像/信号処理(脳，心，臓器，血流ほか), リモートセンシング/プロービング