Tumor image extraction from fluoroscopy for a markerless lung tumor motion tracking and prediction. - Noriyasu Homma; Keita Ishihara; Yoshihiro Takai; Haruna Endo; Kei Ichiji; Masao Sakai; Yuichiro Narita; Makoto Abe; Norihiro Sugita; Makoto Yoshizawa (Image-Guided Procedures, 2012)