luo yuanzhan liver-5501 200255011 7/2/02 12292 8 腔 静脉 SP:-387mnl 膈脚 ST:10.0mm 512×512 C90 EDICAL SYSTEMS W200 HiSpeed CT/i肝右叶 下腔 静脉 腹主 动脉 胃 脾 膈脚