16层螺旋CT低剂量扫描在女性骨盆中的应用

Application of dose reduction scan mode in 16-slice spiral CT examination of female pelvis

目的评价16层螺旋CT低剂量扫描在女性骨盆中的应用。方法30例志愿者用16层螺旋CT行女性骨盆扫描,分别采用低剂量扫描(Care Dose)和传统方法扫描,将两组女性骨盆图像按各影像颗粒均匀性、解剖结构细节、界面清晰度和有无伪影等评定图像质量。同样对两组的CT检查辐射剂量进行对照研究。结果两组扫描方法对女性骨盆图像质量的显示差异无统计学意义;剂量扫描与传统扫描相比,辐射剂量大大降低(P<0.01)。结论16层螺旋CT低剂量扫描在女性骨盆图像质量不下降的同时,可以较传统CT扫描减少受检者的辐射剂量。

Objective To evaluate the clinical application of the dose reduction scan mode in examination of female pelvis using 16-slice spiral CT. Methods Thirty volunteers were chosen to perform female pelvis examination with the 16-slice spiral CT. Two scan modes were applied including dose reduction spiral CT examination（Care Dose）and conventional spiral CT examination. The quality of female pelvis images was compared by grain homogeneity, fine structure, clearness of tissue interface and artifacts. The radiation dose of CT examination was also compared between the two scan modes. Results The quality of female pelvis images was not different ; but the radiation dose was reduced more by the dose reduction scan mode compared with that by the conventional scan mode（ P 〈 0.01 ）. Conclusion The dose reduction scan mode can reduce more radiation dose than the conventional one, while its image quality is the same in examination of female pelvis using 16-slice spiral CT.