Three-dimensional digital ultrasound imaging system for surgical navigation*1. - Ichiro Sakuma; Yasuyoshi Tanaka; Yuichi Takai; Etsuko Kobayashi; Takeyoshi Dohi; Oliver Schorr; Nobuhiko Hata; Hiroshi Iseki; Yoshihiro Muragaki; Tomokatsu Hori; Kintomo Takakura (CARS, 2001)