Diagnostic performance of prospective versus retrospective electrocardiogram-gated 64-slice computed tomography coronary angiography
10.3321/j.issn:0253-3758.2008.11.007
- VernacularTitle:64层CT冠状动脉成像的前瞻性与回顾性心电门控比较
- Author:
Xu-Chun YUAN
1
;
Xiang QIU
;
Xian-Zhu WANG
;
Wen-Ling LIAO
;
Qin CHEN
;
Hui-Yi DENG
Author Information
1. 深圳市孙逸仙心血管医院
- Keywords:
Tomography,X-ray computed;
Coronary angiography;
Prospective electrocardiogram triggered
- From:
Chinese Journal of Cardiology
2008;36(11):985-988
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the diagnostic performance of prospective electrocardiogram (ECG)-triggered computed tomography coronary angiography (CTCA) versus retrospective ECG-gated CTCA.Methods Patients with suspected coronary artery disease divided into two groups which underwent 64-slice CTCA with prospective ECG-triggered or retrospective ECG-gated scanning (n=100 each,HR≤65 bpm).Multi-planar reconstruction (MPR),curved-planar reconstruction (CPR),maximum intensity projection (MIP) and volume rendering (VR) were made to demonstrate the coronary arteries.The image quality was defined as excellent,good and poor by motion and stair-step artifacts.Individual radiation exposure dose was estimated from the dose-length product.Results The mean effective radiation dose of prospective ECG-triggered CTCA[(2.81±0.48)mSv] was significantly lower than that of retrospective ECG-gated CTCA[(10.16±1.09)mSv,P＜0.01].Segments of diagnostic image quality (95.2%,1165/1224) and non-diagnostic coronary segments (4.8%,59/1224) in prospective ECG-triggered group were similar as those of retrospective ECG-gated group (94.1%,1186/1261 and 5.9%,75/1261,all P＞0.05).Conclusion Though the radiation exposure dose required is significantly lower,the diagnostic performance of prospective ECG-triggered 64 slice CTCA is comparable with that of retrospective ECG-gated 64 slice CTCA on patients with stable heart rates up to 65 bpm.
