Adaptive Cardio Sequence Prospective ECG-gated Dual-source CT Coronary Artery Imaging:An Initial Study
10.3969/j.issn.1002-1671.2009.12.038
- VernacularTitle:自适应前瞻性心电门控双源CT冠状动脉成像的初步研究
- Author:
Changsheng ZHOU
;
Huabin WANG
;
Yane ZHAO
;
Longjiang ZHANG
;
Lin LI
;
Yan MA
;
Xue AI
;
Ling ZHENG
;
Wei HUANG
;
Guangming LU
- Publication Type:Journal Article
- Keywords:
heart;
coronary artery;
computed tomography;
dual-source
- From:
Journal of Practical Radiology
2009;25(12):1821-1824,1835
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility of the adaptive cardio sequence prospective ECG-gated dual-source CT coronary angiography (CTCA).Methods Thirty one patients underwent prospective ECG-gated dual-source CTCA. The patients were divided into two groups: group A, heart rate ≤ 75 times / minutes, 70% of R-R interval was chose; group B, heart rate> 75 times / minutes, 40% of R-R interval was chose. Two experienced radiologists assessed the image quality of 15 segments of coronary arteries in a double blinded fashion in a four score scale. Student t test was used to compare the image quality between two groups. CT dose index(CTDIvol) and effective dose(ED) were also calculated for both groups. Results 437 segments of coronary arteries in 31 patients were included this analysis, 408 segments (93.4%) had assessable image quality, while 29 segments (6.6%) had non assessable image quality. Of 226 segments in group A, 12 segments (5.3%) had non assessable image quality; however, 17 segments (8.1%) of 211 segments in group B had non assessable image quality. The average score of image quality was 3.57±0.64 in 31 patients. There was no statistical difference for mean image quality of group A (3.65±0.39) and group B (3.41±0.43)( t=1.62,P=0.12 ) . There was a statistical difference for mean image quality for segment 10 on a per segment basis ( t = 3.8 ,P＜0.05). CTDIvol and ED were (18.88±5.04) mGy and (4.31±1.05) mSv, respectively.Conclusion Adaptive cardio sequence prospective ECG-gated dual source CT can acquire assessable image quality of coronary artery with lower radiation dose to the patients, which has the potential to be a routine CTCA technique.
