淮安市CT检查致成年受检者的剂量水平及其影响因素调查研究  

Investigation on radiation doses and related influencing factors for CT adult examinations in Huai′an city

作　　者：霍彬彬 徐志勇[1] 何冬冬[1] 陈晓敏[1] Huo Binbin;Xu Zhiyong;He Dongdong;Chen Xiaomin(Public Health Division,Huai′an Centers for Disease Control and Prevention,Huai′an 223001,China)

机构地区：[1]淮安市疾病预防控制中心职业卫生科,淮安223001

出　　处：《中华放射医学与防护杂志》2023年第1期45-50,共6页Chinese Journal of Radiological Medicine and Protection

基　　金：淮安市自然科学研究计划(指导性)项目(HABZ202004)。

摘　　要：目的调查淮安市CT检查所致成年受检者的剂量水平,探讨本地CT诊断参考水平(DRLs)。方法选取全市45台CT,对医院信息、设备信息、扫描参数、辐射剂量表征量等信息进行调查。使用经验公式估算CT检查所致成年受检者的有效剂量。采用非参数秩和检验分析辐射剂量水平在CT役龄和医院级别等因素之间的差异。结果共收集3483例受检者剂量信息,头部890例、胸部890例、腹部846例、腰椎857例。头部、胸部、腹部、腰椎的容积CT剂量指数(CTDI_(vol))第75百分位数分别为63.0、12.4、20.0、24.0 mGy;剂量长度乘积(DLP)第75百分位数858.6、416.0、620.7、559.2 mGy·cm,男性的DLP第75%百分位数均高于女性。剂量水平随着设备役龄发生不同程度的偏移(头部:U=10326.00,P<0.05;胸部:U=36094.50,P<0.05;腹部:U=7859.00,P<0.05;腰椎:U=42408.00,P<0.05),不同级别医院之间同部位CT检查的辐射剂量差异也具有统计学意义(头部:H=14.28,P<0.05;胸部:H=17.85,P<0.05;腹部:H=97.18,P<0.05;腰椎:H=138.94,P<0.05)。结论淮安市CT辐射剂量水平与卫生推荐标准值基本一致,符合我国CT设备剂量水平现状。有必要加强CT设备的质量控制和保养力度。Objective To investigate the level of radiation doses to adults caused by CT examination in Huai′an,and explore the local CT diagnostic reference levels(DRLs).Methods Totally 45 CT scaners were selected to investigate the information on hospitals,equipment,scanning parameters,and radiation doses.Empirical formula were used to estimate the effective dose to adults.Nonparametric rank sum tests were used to analyze differences in radiation dose level between CT service age and hospital grade.Results A total of 3483 patients were collected,including 890 for head examinations,890 for chest,846 for abdomen,and 857 for lumbar spine.The 75%percentile values of CTDI_(vol) to adult patients from CT scanning for head,chest,abdomen,lumbar spine examinations were 63.0,12.4,20.0 and 24.0 mGy,respectively.The 75%percentile values of DLP were 858.6,416.0,620.7 and 559.2 mGy·cm,respectively.The 75%percentile values of DLP for males was higher than those for females.There were significant statistical differences in radiation doses dependent on equipment service(head:U=10326.00,P<0.05;chest:U=36094.50,P<0.05;abdomen:U=7859.00,P<0.05;lumbar spine:U=42408.00,P<0.05),and hospital grade(head:H=14.280,P<0.05;chest:H=17.85,P<0.05;abdomen:H=97.18,P<0.05;lumbar spine:H=138.94,P<0.05).Conclusions The CT radiation dose levels in Huai′an city is basically consistent with standard-reommended values,which is in line with the current status of CT equipment dose levels in the country.It is necessary to strengthen the quality control and maintenance of CT equipment.

关 键 词：容积CT剂量指数 诊断参考水平 有效剂量 集体有效剂量 

分 类 号：R814.2[医药卫生—影像医学与核医学]