Talk from Yoshifumi Saijo, Tohoku University, Sendai, Japan

The world's first ultrasound cardiac tomogram was developed at Tohoku University through collaboration of medicine and engineering. Multiscale blood flow visualization methods by ultrasound and photoacoustic imaging at Tohoku University are introduced. First, the principle of Doppler blood flow measurement and the technology for correcting aliasing, which is a drawback of Doppler measurement, is presented. The principles and validation of “echo-dynamography” and vector projectile imaging for two-dimensional blood flow vectors are also presented. For imaging of peripheral blood flow, high-resolution imaging using high-frequency ultrasound, detection of micro vessels using singular value resolution, and recently developed photoacoustic imaging that can visualize microvasculature and even a single red blood cell are also be presented.

About Prof. Saijo:
Yoshifumi Saijo received the M.D. and Ph.D. degrees from Tohoku University, Sendai, Japan, in 1988 and 1993, respectively. He had been trained as a Cardiologist at Sendai Kosei Hospital and Tohoku Welfare Pension Hospital (currently Tohoku Medical and Pharmaceutical University Hospital) and he became a Chief Cardiologist to perform percutaneous coronary intervention at Fukaya Public Hospital in 1995. He returned to the Institute of Development, Aging and Cancer (IDAC) at Tohoku University to conduct research and development in medical ultrasound in 1997. He became a Guest Professor at Aarhus University, Aarhus, Denmark, in 1999 and became an Associate Professor of IDAC at Tohoku University in 2004. He has been a Professor with the Graduate School of Biomedical Engineering and the Graduate School of Medicine, Tohoku University, since 2008. He is concurrent with a supervisor of the Clinical Technology Department at Tohoku University Hospital. He works as the Dean of the Graduate School of Biomedical Engineering with Tohoku University, in April 2022. His main research interests include high-frequency biomedical ultrasound imaging, cardiovascular blood flow analysis, and photoacoustic imaging. Prof. Saijo is a member of the Japan Society of Ultrasonics in Medicine, the Japanese Society of Echocardiography, the Japanese Society for Medical and Biological Engineering, and the Japan Circulation Society. He was awarded in 1997 for his outstanding research paper in Ultrasound in Medicine and Biology and the official journal of the World Federation of Ultrasound in Medicine and Biology