胸部X线摄影照射野内外辐射剂量的探讨  

Study of chest X-ray photography radiation dose of radiation field inside and outside

作　　者：黄奋尧[1] 俞家熙[1] 陈智杰[1] 方鸣[1] 宋玉全[1] 

机构地区：[1]广州医科大学附属第一医院放射科,510120

出　　处：《实用医学影像杂志》2015年第3期224-226,共3页Journal of Practical Medical Imaging

摘　　要：目的探讨胸部X线摄影照射野内外的辐射剂量。方法 1剂量仪探头放置:在常规胸部摄影中,将剂量仪探头分别放置于探测板右上方照射野内1 cm处和照射野外1 cm处,用透明胶固定。2对照组(探头在照射野内):在常规胸部正侧位摄影中,记录每次曝光的电流、照射野内探头探测相对应的吸收剂量、影像上显示的吸收剂量。3实验组(探头在照射野外):在常规胸部正侧位摄影中,记录每次曝光的电流、照射野外探头探测相对应的吸收剂量、影像上显示的吸收剂量。4统计学方法:分别统计实验组和对照组正侧位电流、剂量仪吸收剂量、影像上显示的吸收剂量的均值,采用独立样本t检验,评价实验组和对照组正侧位电流、剂量仪吸收剂量、影像上显示的吸收剂量是否存在统计学差异,当P>0.05时,差异无统计学意义。结果对照组(探头在照射野内)正侧位摄影电流均值和标准差分别为3.1±0.8,7±4,实验组(探头在射野外)正侧位摄影电流均值和标准差分别为3.2±0.7,8±4;对照组正侧位剂量仪吸收剂量均值和标准差分别为89.4±33.7,237.6±106.6;实验组正侧位剂量仪吸收剂量均值和标准差分别为2.2±0.6,4.0±2.1;对照组正侧位影像上显示的吸收剂量均值和标准差分别为203±61,503±263;实验组正侧位影像上显示的吸收剂量均值和标准差分别为210±48,512±232;对两者电流、剂量仪吸收剂量、影像上显示的吸收剂量进行独立样本t检验,t值分别为正位电流0.355,侧位电流0.085,正位剂量仪吸收剂量-23.694,侧位剂量仪吸收剂量-20.076;正位影像上显示的吸收剂量0.729,侧位影像上显示的吸收剂量0.224。P值分别为正位电流0.723,侧位电流0.932;正位剂量仪吸收剂量0.001,侧位剂量仪吸收剂量0.001;正位影像上显示的吸收剂量0.467,侧位影像上显示的吸收剂量0.823。正侧位m As、正侧位影像上显示的吸收剂量差异无统计学意Objective To discuss the chest X-ray photography radiation dose of the radiation field inside and outside. Methods 1 Dose meter probe placed： in routine chest photography, placed dosimeter probe respectively in detecting plate within the radiation field at the upper field to 1 cm, 1 cm and irradiation with cellophane tape. 2 The control group（probe within the radiation field） ： in routine chest is oblique photography, record each exposure of m As,radiation field inside the probe to detect the corresponding absorption dose, image displayed on the absorbed dose. 3 The experimental group（probe in the radiation field） ： in routine chest is oblique photography, record each exposure of m As, irradiation field probe to detect the corresponding absorbed dose, the image displayed on the absorbed dose.4 Statistical methods： statistics of the experimental group and control group in the positive side of the m As, dosimeter absorbed dose, image display on the mean absorbed dose, using independent sample t test, evaluation of the experimental group and control group in the positive side of m As, dosimeter absorption dose, the image displayed on the ab-sorbed dose, whether there was a statistically significant, when P0.05 there was no statistically significant difference.Results Control group（probe） within the radiation field was oblique photography m As mean and standard deviation were 3.1±0.8, 8±4, probe in the radiation field（experimental group） had oblique photography m As mean and standard deviation were 3.2±0.7, 8±4. Side of control was a dosimeter absorbed dose mean and standard deviation were 89.4 ±33.7, 237.6±106.6; side of experimental group was a dosimeter absorbed dose mean and standard deviation were 2.2 ±0.6, 4.0±2.1; control group on the positive side of the image showed the absorbed dose of mean and standard deviation were 203±61, 503±263. Experimental group on the positive side of the image showed the absorbed dose of mean and standard deviation were 2 109 ±48, 512 ±232; For

关 键 词：放射摄影术 胸部 照射野 吸收剂量 

分 类 号：R816.4[医药卫生—放射医学]