False positive reduction for ground glass opacities in CT by feature analysis based on a multiple-region extraction technique. - Minoru Harada; Shinji Mizuno; Hotaka Takizawa; Shinji Yamamoto; Toru Matsumoto 001; Shusuke Sone; Fumiyoshi Takayama; Masahiro Koyama; Shinichi Wada (SIP, 2005)