Materials and methods: All examinations were performed on a 1.5T scanner (Signa, GE Medical Systems, Milwaukee,Wis) with a 3D fSPGR sequence.

• 材料与方法 1) 11名健康志愿者随机分为三组，所有检查均采用1.；5T磁共振扫描仪(Signa，GE Medical Systems，Milwaukee，Wis)，使用体线圈和3D fSPGR序列成像，应用三站成像技术，扫描范围从肾下腹主动脉到踝部血管。