Feasibility of prospective ECG gated scan and adaptive cardio sequence scan for dual-source CT coronary angiography
10.3969/j.issn.1002-1671.2014.05.016
- VernacularTitle:前瞻和适应性前瞻门控序列在双源 CT 冠状动脉成像中的应用
- Author:
Xin QIN
;
Guanxun CHENG
;
Yi ZHU
;
Qian GAO
- Publication Type:Journal Article
- Keywords:
coronary artery;
computed tomography;
prospective ECG-gated scan;
adaptive cardio sequence;
radiation dose
- From:
Journal of Practical Radiology
2014;(5):778-782
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility and clinical application of prospective ECG-gated scan and adaptive cardio se-quence scan of dual-source CT coronary angiography.Methods 255 patients who underwent coronary CT angiography using a dual-source CT scanner were divided into two groups:group A underwent prospective scan,group B underwent retrospective scan.The two groups were further subdivided into low heart rate group and high heart rate group,recorded as A1(n=51),A2(n=89),B1(n=26), B2(n=89),respectively.Group A1 preceded with prospective ECG gated scan;group A2 performed with adaptive cardio sequence scan;group B1 and B2 underwent retrospective scan.All of them applied ATCM (automatic tube current modulation)technique. Effective dose was recorded.The image quality was assessed by two experienced radiologists with a four-point grading scale.Results The excellent or good image quality (score 1 and 2)of the four groups were above 95%,and no statistical differences in images scores was detected in A1 and B1 (P =0.726),A2 and B2 (P =0.079).Effective dose was significantly different in A1 and B1(P <0.001),A2 and B2 (P <0.001),and the former decreased 50% and 40% as compared with the latter.Conclusion Using prospective ECG gated scan and adaptive cardio sequence scan,assessable image quality of coronary artery can be acquired with dual source CT (heart rate<90 beast per minute),and radiation dose can be obviously reduced.
