低剂量扫描在CT气腹造影中的应用  

Application of Low Dose CT Scan in Pneumoperitoneal Visualization with 64-row Multi-slice Helical CT

作　　者：张如意[1] 孙宪昶[1] 刁俊龙[2] 崔晓明[1] 

机构地区：[1]武警总医院CT科,北京100039 [2]武警总医院药剂科,北京100039

出　　处：《中国医学影像学杂志》2010年第5期438-441,共4页Chinese Journal of Medical Imaging

摘　　要：目的:探讨低剂量技术在64排螺旋CT气腹造影检查中的应用。材料和方法:连续选取56例患者进行CT气腹造影检查。将患者分为常规组(C组)和低剂量组(L组),每组28例。C组采用标准采集方法,L组采用低剂量采集方法,对C组和L组图像质量、容积CT剂量指数(CTDIvol)进行评估,应用spss10.0软件对C组和L组间图像质量评分及CT剂量指数差异进行t检验,P<0.05为有统计学意义。结果:C、L组图像质量评分均值分别为2.62±0.54分、2.48±0.57分,两组间无统计学意义(P>0.05),而C、L组CTDIvol均值分别为(24.89±2.38)mGy/cm、(1.59±0.82)mGy/cm,L组CTDIvol均值明显低于C组,两组间差异有统计学意义(P<0.01)。结论:低剂量采集方法既可明显降低受检者的射线剂量又能满足诊断需求。Purpose To explore the application of low dose CT scan in pneumoperitoneal visualization with 64-row multi-slice CT scanner.Materials and Methods 56 consecutive patients who underwent CT scans after pneumoperitoneal visualization were divided into conventional group（C group）and low dose group（L group）with 28 patients in each group.Standard scan technique was used in C group and low dose CT scan was employed in L group.Image quality,volume CT dose index（CTDIvoI）in the two groups were evaluated.Statistical difference of image quality and the CTDIvoI between the two groups was determined by using t-test with the spss10.0 software.P〈0.05 was considered statistically significant.Results The mean value of image quality score was 2.62±0.54,2.48±0.57 respectively.There was no significant difference between the two groups（P〉 0.05）.However;the average CTDIvoI in C group and L group was（24.89±2.38）mGy/cm,（1.59±0.82）mGy/cm respectively.The CTDIvoI in L group were lower than those in C group（P〈0.01）.Conclusions Low dose CT scan in pneumoperitoneal visualization could not only reduce radiation dose to the patient,but also meet the requirement of the diagnosis.

关 键 词：体层摄影术 螺旋计算机 气腹 人工 辐射剂量 

分 类 号：R814.42[医药卫生—影像医学与核医学]