Naoshi Koizumi Kazuki Sumiyama Naoki Suzuki Asaki Hattori Hisao Tajiri Akihiko Uchiyama Development of Three-Dimensional Endoscopic Ultrasound System with Optical Tracking. 60-65 2002 conf/miccai/2002-1 MICCAI (1) http://dx.doi.org/10.1007/3-540-45786-0_8 db/conf/miccai/miccai2002-1.html#KoizumiSSHTU02