CAJ | 학술논문

目的探讨双源Flash Spiral CT前瞻性心电触发序列(step-and-shoot,SAS)模式脑血管成像的图像质量及辐射剂量.方法将43例临床怀疑脑血管性病变的患者,行前瞻性心电触发序列模式的脑血管造影术( SAS-CTA)扫描,采集期相:应用60％ R-R间期的ECG演示模式,对SAS-CTA做图像后处理,分析评价图像质量评分、统计辐射剂量及优良率.结果评价SAS-CTA,图像质量评分为4.72±0.50,优良率达97.7％ (42/43),平均有效剂量为(0.216±0.01) mSv,SAS-CTA有效辐射剂量与双能量CTA( DE-CTA)比较降幅达到76.31％.结论前瞻性心电触发序列模式应用于脑血管成像,可在保证图像质量的同时显著降低辐射剂量.
목적 탐토쌍원Flash Spiral CT전첨성심전촉발서렬(step-and-shoot,SAS)모식뇌혈관성상적도상질량급복사제량.방법 장43례림상부의뇌혈관성병변적환자,행전첨성심전촉발서렬모식적뇌혈관조영술( SAS-CTA)소묘,채집기상:응용60％ R-R간기적ECG연시모식,대SAS-CTA주도상후처리,분석평개도상질량평분、통계복사제량급우량솔.결과 평개SAS-CTA,도상질량평분위4.72±0.50,우량솔체97.7％ (42/43),평균유효제량위(0.216±0.01) mSv,SAS-CTA유효복사제량여쌍능량CTA( DE-CTA)비교강폭체도76.31％.결론 전첨성심전촉발서렬모식응용우뇌혈관성상,가재보증도상질량적동시현저강저복사제량.
Objective To study the image quality and radiation dose in dual-source CT cerebral angiography with prospective ECG-triggered sequence mode (step-and-shoot,SAS).Methods A total of forty-three patients with clinically suspected cerebral vascular disease underwent cerebral CT angiography with prospective ECG-triggering (step-and-shoot,SAS).Data acquisition was at 60％ R-R interval of the ECG presentation mode.The post-processing included maximum intensity projection (MIP),multiplanar reformation (MPR) and volume rendering (VR).The CTA image quality,radiation dose and rates of excellent images were evaluated.Results The CTA image quality score was 4.72 ± 0.50 and 97.7％ (42/43) patients had excellent CTA images.The average effective dose of SAS-CTA was (0.22 ± 0.01 )mSv,which was lower by 76.31％ than that of DE-CTA.Conclusions Prospective ECG-triggering sequence could be used in cerebral angiography with a significant reduction in radiation dose and diagnostic image quality.