目的探讨64排螺旋CT的低剂量扫描技术及高级迭代重建技术对实现骨盆低剂量检查的意义。方法  将86例需行骨盆CT检查的患者随机分配到常规剂量组、低剂量组使用64排螺旋CT进行检查，低剂量组使用低剂量扫描技术及高级迭代重建技术进行CT扫描和原始数据重建，检查完毕后对两组所得图像进行成像质量和检查剂量的比较。结果 低剂量组的检查辐射剂量低于常规剂量组(t=82.34，P＜0.05)，两组的成像质量没有差别(t=2.17、2.58，P＞0.05)。结论  使用64排螺旋CT以低剂量技术进行骨盆CT检查是可行的，可在保证诊断质量的前提下明显降低检查辐射剂量。

Objective To explore the value of low-dose scanning technology and advanced iterative reconstruction technology using the 64 multidetector CT (64- MDCT) for achieving low-dose pelvic examination. Methods 86 patients were randomly assigned to the regular dose group and low-dose group to receive 64-MDCT pelvic examination,low-dose scanning technology and advanced iterative reconstruction technology were applied in low-dose group,image quality and exposure dose were compared. Results The exposure dose of low- dose group is lower than the regular dose group (t=82.34,P＜0.05), there is no difference in image quality of the two groups (t=2.17,2.58,P＞0.05). Conclusion It is feasible to use the 64-MDCT examine patients in a low-dose way, and low-dose scanning technique can ensure the diagnostic quality and reduce the exposure dose.