16层螺旋CT低剂量扫描在儿童头部检查中价值的探讨  

Value of Low-dose 16-slice Spiral CT Examination in the Children's Head

作　　者：卢伟光 曾怡群 赖焕泉 曾莉梅 

机构地区：[1]广东省兴宁市人民医院放射科,广东兴宁514500

出　　处：《中国CT和MRI杂志》2015年第3期33-35,48,共4页Chinese Journal of CT and MRI

基　　金：2013年度梅州市科技计划项目医研;科教类立项2013B75

摘　　要：目的比较不同低剂量多层螺旋CT扫描在儿童头部检查中获得的图像质量,建立合适的儿童头部低剂量扫描条件,寻找达到临床诊断要求的同时减少患儿接受的放射剂量。方法前瞻性地将90例儿童头部外伤后16层螺旋CT平扫检查的患者随机分为三组:常规剂量组30例(120Kv,250m As)、低m As组30例(120Kv,150m As)和低Kv低m As组30例(90Kv,150m As),由3名副主任医师职称以上的放射科医生在不知三组CT扫描条件的前提下对三组CT图像质量进行评估,分优、良和差三个等级。结果三组不同CT剂量扫描参数获得的CT图像质量优良率无统计学差异(p>0.05),均可满足临床诊断需求。结论低Kv低m As组(90Kv,150m As)的CT检查图像质量既可满足临床诊断要求,又可减少儿童头部接受的辐射剂量。Objective To compare the different low-dose multislice CT image quality in the examination of the children＇s head for the establishment of appropriate low-dose scan parameters, in order to reduce radiation dose in the clinical diagnosis. Methods 90 children of head CT examination prospectively were randomly divided into three groups：the conventional dose group of 30 children （120Kv,250mAs）, low mAs group of 30 children （120 Kv,150mAs）, low mAs and low Kv group of 30 children （90 Kv,150mAs）. The analysis of head CT image quality in the three groups was done by three radiologists. Results CT image quality of the head with different scan parameters in the three groups could meet the diagnostic requirements. There was no significant difference among the three CT image quality （p〉0.05）. Conclusion CT image quality with low mAs and low Kv （90 Kv,150mAs） can meet the requirements of clinical diagnosis while reducing the dose of radiation.

关 键 词：多层CT 儿童 头部 低剂量 

分 类 号：R651[医药卫生—外科学]