CAJ | 학술논문

目的：大体重患者在冠脉CTA前瞻性序列扫描中运用ECG管电流调制技术评价X线吸收剂量及临床应用。方法40例体重指数(BMI)＞24的患者在冠脉CTA检查中随机分为两组：A组20例采用ECG管电流调制技术(ATCM)，心率＜70次/分时，扫描范围为20%-80%R-R间期，设60%-80%R-R间期组为全剂量扫描范围；心率＞70次/分时，扫描范围为20%-80%R-R间期，设35%-55%R-R间期组为全剂量扫描。B组20例均选用20%-80%R-R间期组为全剂量扫描；比较两组病例的图像质量及辐射剂量。结果 A组平均辐射剂量(6.91±2.78)，B组为(10.43±3.36)，A组比B组减少了33.77%的辐射剂量；辐射剂量有统计学差异(P＜0.05)，而图像质量无明显差别。结论在前瞻性序列扫描中运用ECG管电流调制技术可以明显降低大体重患者的辐射剂量。
목적：대체중환자재관맥CTA전첨성서렬소묘중운용ECG관전류조제기술평개X선흡수제량급림상응용。방법40례체중지수(BMI)＞24적환자재관맥CTA검사중수궤분위량조：A조20례채용ECG관전류조제기술(ATCM)，심솔＜70차/분시，소묘범위위20%-80%R-R간기，설60%-80%R-R간기조위전제량소묘범위；심솔＞70차/분시，소묘범위위20%-80%R-R간기，설35%-55%R-R간기조위전제량소묘。B조20례균선용20%-80%R-R간기조위전제량소묘；비교량조병례적도상질량급복사제량。결과 A조평균복사제량(6.91±2.78)，B조위(10.43±3.36)，A조비B조감소료33.77%적복사제량；복사제량유통계학차이(P＜0.05)，이도상질량무명현차별。결론재전첨성서렬소묘중운용ECG관전류조제기술가이명현강저대체중환자적복사제량。
Objective To evaluate the clinical application value of electrocardiograph tube current modulation in the sequence scanning of computer tomography coronary angiography (CTCA) to high body mass index(BMI) patients. Methods 40 patients underwent CTCA were randomly divided into two groups. Group A apply automatic tube current modulation scanning technique (20 cases),when heart rate(HR)<70bpm and 60%-80% R-R interval of ECG-pulsing windows, HR>70bpm and 35%-55% R-R interval of ECG-pulsing windows were employed full-dose, and 20%-80%interval was range. 20%-80%interval Image quality of ECG-pulsing windows were employed full-dose in group B. Image quality and radiation dose were compared between two groups. Results The average radiation dose were (6.91±2.78) in group A,and (10.43±3.36) in group B. The radiation dose was decreased by 33.77%for group A. There was significant difference between radiation dose of the study group and that of the control group (p<0.05),and there was no difference on image quality between two groups. Conclusion The proper application of narrow ECG-pulsing windows can reduce radiation expose significantly to high BMI patients in dual-source CT prospected coronary angiography without sacrificing the image quality.