CAJ | 학술논문

目的比较双轴旋转造影(RA)与传统标准造影(SA)时患者所受辐射剂量.方法采用同一拟人模体模拟临床条件下的冠状动脉造影.根据不同造影模式,实验分为RA组和SA组,根据不同电影时间,SA组又分为2 s组(SA1)、3 s组(SA2)、5 s组(SA3)3个亚组.造影操作使用机器预设程序自动调节造影体位并控制透视及造影时间,每组均使用同一模体重复操作10次完整造影,采用TLD 3×3矩阵和造影机随机配备的射线剂量仪同时记录辐射剂量,后者可记录剂量面积乘积(DAP)和空气比释动能(AK),每组数据重复测量10次取均值进行比较.结果完成整个造影操作,RA组累计DAP、AK均值分别为3 061.6mGy·cm2和64.2 mGy,低于SA1组(4 213.9 mGy· cm2和85.5 mGy)、SA2组(6 436.0 mGy·cm2和112.2 mGy)、SA3组(12 810.4 mGy·cm2和243.7 mGy).RA组累计皮肤入射剂量的均值(37.70 mGy)高于SA1组(26.56 mGy),但低于SA2组(46.86 mGy)、SA3组(77.79 mGy).SA中3个亚组TLD剂量最大点与剂量最小点差异十分显著,而RA组剂量分布相对平均.结论双轴旋转造影与传统标准造影相比,患者的累计辐射剂量显著降低,在一定程度上避免了皮肤损伤.
목적 비교쌍축선전조영(RA)여전통표준조영(SA)시환자소수복사제량.방법채용동일의인모체모의림상조건하적관상동맥조영.근거불동조영모식,실험분위RA조화SA조,근거불동전영시간,SA조우분위2 s조(SA1)、3 s조(SA2)、5 s조(SA3)3개아조.조영조작사용궤기예설정서자동조절조영체위병공제투시급조영시간,매조균사용동일모체중복조작10차완정조영,채용TLD 3×3구진화조영궤수궤배비적사선제량의동시기록복사제량,후자가기록제량면적승적(DAP)화공기비석동능(AK),매조수거중복측량10차취균치진행비교.결과완성정개조영조작,RA조루계DAP、AK균치분별위3 061.6mGy·cm2화64.2 mGy,저우SA1조(4 213.9 mGy· cm2화85.5 mGy)、SA2조(6 436.0 mGy·cm2화112.2 mGy)、SA3조(12 810.4 mGy·cm2화243.7 mGy).RA조루계피부입사제량적균치(37.70 mGy)고우SA1조(26.56 mGy),단저우SA2조(46.86 mGy)、SA3조(77.79 mGy).SA중3개아조TLD제량최대점여제량최소점차이십분현저,이RA조제량분포상대평균.결론쌍축선전조영여전통표준조영상비,환자적루계복사제량현저강저,재일정정도상피면료피부손상.
Objective To compare radiation doses to patients between rotational angiography and standard angiography.Methods According to different modes,our experiment was divided into RA (Dual-axis Rotational Angiography) group and SA (Standard Angiography) group.The latter was divided into 3 subgroups (SA1,SA2 and SA3) in terms of different time of cine.The procedure time and the position were controlled by the order preset into the machine.Each group consisted of 10 repeated operations with a unique phantom to simulate the true patients.The radiation doses were measured by using dose meter provided by the machine and TLD system; the means of the data were compared.Results The mean of total accumulated DAP and AK in group RA were 3 061.6 mGy·cm2 and 64.2 mGy,respectively,compared with group SA1 (4 213.9 mGy·cm2 and 85.5 mGy),SA2 (6 436.0 mGy·cm2 and 112.2 mGy),SA3 (12 810.4 mGy·cm2 and 243.7 mGy).The mean of accumulated dose in group RA was 37.70 mGy,higher than group SA1 (26.56 mGy) but lower than group SA2 (46.86 mGy) and SA3 (77.79 mGy).The gap between highest dose and lowest dose in RA group was insignificant whereas significant in the subgroups of SA.Conclusions In comparison with conventional angiography,the dual-axis rotational angiography has the potential to reduce radiation exposure of patients significantly so as to prevent skin radiation injures.