CAJ | 학술논문

目的评价心电脉冲(ECG-pulsing)技术对降低CT冠状动脉成像射线剂量的价值及其对图像质量的影响.方法 2007年10月26日到2008年3月12日期间,配合良好,心率控制在80次/min以下,且心律齐的连续受检者59例,采用完全随机化分组方法分为2组,组1(29例)使用传统方法进行CT冠状动脉成像检查,组2(30例)使用ECG-pulsing技术,通过CT机自动得到平均容积CT剂量指数(CT dose index volume,CTDIvol)和剂量长度乘积(dose length product,DLP),计算出相应的有效剂量(effective dose,ED).获得的图像通过双盲法进行质量评分,对两组CTDIvol值、ED值及图像质量评分用t检验进行比较.结果 (1)组1和组2的CTDIvol值分别为(70.0±1.1)和(39.0±2.7)mGy,ED值分别为(16.8±2.0)和(9.5±1.7)msv,两者之间差异均有统计学意义(t值分别为57.675、15.346,P值均<0.01).(2)组1和组2冠状动脉各段图像质量平均评分分别为:组1(3.8±0.2)分,组2(3.8±0.1)分,差异无统计学意义(t=-0.222,P>0.05).结论 64层螺旋CT冠状动脉造影检查时合理运用ECG-pulsiag技术可大幅度降低辐射剂量且不影响图像质量.
목적 평개심전맥충(ECG-pulsing)기술대강저CT관상동맥성상사선제량적개치급기대도상질량적영향.방법 2007년10월26일도2008년3월12일기간,배합량호,심솔공제재80차/min이하,차심률제적련속수검자59례,채용완전수궤화분조방법분위2조,조1(29례)사용전통방법진행CT관상동맥성상검사,조2(30례)사용ECG-pulsing기술,통과CT궤자동득도평균용적CT제량지수(CT dose index volume,CTDIvol)화제량장도승적(dose length product,DLP),계산출상응적유효제량(effective dose,ED).획득적도상통과쌍맹법진행질량평분,대량조CTDIvol치、ED치급도상질량평분용t검험진행비교.결과 (1)조1화조2적CTDIvol치분별위(70.0±1.1)화(39.0±2.7)mGy,ED치분별위(16.8±2.0)화(9.5±1.7)msv,량자지간차이균유통계학의의(t치분별위57.675、15.346,P치균<0.01).(2)조1화조2관상동맥각단도상질량평균평분분별위:조1(3.8±0.2)분,조2(3.8±0.1)분,차이무통계학의의(t=-0.222,P>0.05).결론 64층라선CT관상동맥조영검사시합리운용ECG-pulsiag기술가대폭도강저복사제량차불영향도상질량.
Objective To evaluate the value of reducing radiation dose with ECG-pulsing and image quality in 64-row multi-alice CT coronary angiography.Methods Fifty-nine consecutive patients whose heart rates were less than 80 beat per minute and cardiac rhythm was regular were randomly divided into two groups from October 26, 2007 to March 12, 2008.Conventional technique of CT coronary angiography was employed in group 1, while ECG-pulsing technique was applied in group 2.CT dose index volume (CTDIvol) and dose length product (DLP) were obtained automatically, and then the corresponding effective dose (ED) were calculated.The quality scores were performed on obtained imaging by using double blind method.Student t-test was applied in the comparison of value of CTDIvol, value of ED and quality of imagiugbetween two groups.Results The value of CTDIvol was (70.0±1.1) and (39.0±2.7) mGy, the value of ED was (16.8±2.0) and (9.5±1.7) rosy in group 1 and group 2, respectively, which reached statistically significant differences between the groups(t=57.675,15.346 ,P <0.01, respectively). The quality scores of coronary images were 3.8±0.2 and 3.8±0.1 in the groups, which did not reach the statistical significance (t=-0.222, P 0.05).Conclusions The proper application of ECG-Pulsing technology in 64-slice spiral CT coronary angiography can reduce radiation dose significantly while having no influence on the quality of the imaging.