单位:[1]华中科技大学同济医学院附属同济医院放射科华中科技大学同济医学院附属同济医院放射科[2]北京医院放射科国家老年医学中心[3]Department of Radiology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA[4]Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York ,NY, USA