Hidetoshi Wakamatsu received his B.E. and M.E. degrees from Yokohama National University in 1970 and 1972, respectively. He receieved his Dr. of Eng. degree in 1984 from the University of Tokyo. From 1972-1986 he was a research Associate at the Institute for Medical and Dental Engineering, Tokyo Medical and Dental University. From 1973-1974 he was a Visiting Reseach Associate, Institute for Biocybernetics, Faculty of Medicine, University of Erlangen-Nuernberg, Germany. From 1986-1988 he was an Associate Professor at Ashikaga Institute of Technology, Associate professor from 1988-1991 at Fukui University, Professor at Fukui University from 1992, and Professor, Faculty of Medicine, Tokyo Medical and Dental University in 1992. In 1994 a visiting professor, Oregon State University, Pusan National University in 1995 and Tensuin University in 1996.