CAJ | 학술논문

目的：通过比较64排螺旋CT前瞻性心电门控与回顾性心电门控冠状动脉成像的图像质量和辐射剂量，探讨前瞻性心电门控冠状动脉成像技术在降低辐射剂量中的作用。资料与方法157例疑似冠状动脉疾病的患者随机分为两组，前瞻性心电门控组85例和回顾性心电门控组72例，两组心率均＜65次/min，记录两组的成像质量和辐射剂量，并进行统计学分析。结果前瞻性心电门控组有效辐射剂量(4.42±1.52)mSv明显低于回顾性心电门控组(14.84±3.98) mSv(P<0.01)，差异有统计学意义；前瞻性心电门控和回顾性心电门控两组冠状动脉成像质量评价差异无统计学意义(P＞0.05)，且前瞻性心电门控组图像优秀率略高于回顾性心电门控组。结论在较低且平稳的心率(≤65次/min)条件下，采用64排螺旋CT前瞻性心电门控技术即能有效降低辐射剂量，又能保证临床诊断所需的冠状动脉图像质量。
목적：통과비교64배라선CT전첨성심전문공여회고성심전문공관상동맥성상적도상질량화복사제량，탐토전첨성심전문공관상동맥성상기술재강저복사제량중적작용。자료여방법157례의사관상동맥질병적환자수궤분위량조，전첨성심전문공조85례화회고성심전문공조72례，량조심솔균＜65차/min，기록량조적성상질량화복사제량，병진행통계학분석。결과전첨성심전문공조유효복사제량(4.42±1.52)mSv명현저우회고성심전문공조(14.84±3.98) mSv(P<0.01)，차이유통계학의의；전첨성심전문공화회고성심전문공량조관상동맥성상질량평개차이무통계학의의(P＞0.05)，차전첨성심전문공조도상우수솔략고우회고성심전문공조。결론재교저차평은적심솔(≤65차/min)조건하，채용64배라선CT전첨성심전문공기술즉능유효강저복사제량，우능보증림상진단소수적관상동맥도상질량。
Objective To explore the role of prospective ECG-gated coronary angiography in reducing radiation dose by comparing image quality and radiation dose of prospective and retrospective ECG-gated 64-row CT coronary angiography. MaterialsandMethods 157 patients suspected coronary artery disease were divided in two groups. 85 patients were taken prospective ECG gating axial scan and 72 were taken retrospective ECG gating helical scan.The heart rate was ﹤65bmp.Coronary artery segments were assessed for imaging quality and radiation dose values were calculated. Results Effective radiation dose of prospective ECG gating group (4.42±1.52mSv) was significantly lower than that of retrospective ECG gating group (14.84±3.98mSv)(P<0. 01). There was no significant difference in image quality between two groups(P﹥0.05),and image excellent rates of prospective ECG gating group was higher than that of retrospective ECG gating group. Conclusion Prospective ECG gating axial scan effectively reduces the radiation dose and receives similar image quality compared with retrospective ECG gating coronary angiography in patients with heart rates﹤65bpm.