Purpose: The newer 256-slice computed tomography coronary angiography (CTCA) has the capability of improving diagnostic performance in the detection of obstructive coronary artery disease (CAD) compared to 64-slice CTCA. The aim of this study was to compare the diagnostic performance of 64- versus 256-slice CTCA in two similar populations. Methods: Our study included 120 consecutive patients who were referred for CTCA and subsequently underwent conventional coronary angiography (CCA). Sixty patients were studied by 64-slice CTCA, with the other 60 by 256-slice CTCA. We compared the technical characteristics and diagnostic performance of 64- and 256-slice CTCA for the detection of ≥ 50% stenosis of the coronary arteries on CCA. Results: The 256-slice CTCA had a shorter scanning time (4.4 ± 0.6 sec vs. 5.0 ± 0.7 sec, p <0.001) compared to 64-slice CTCA. The diagnostic accuracy rates of 256-slice CTCA based on patient analysis (97% vs. 83%, p <0.05), vessel analysis (95% vs. 85%, p <0.05), and segment analysis (94% vs. 88%, p <0.05) were significantly superior to those of 64-slice CTCA. The diagnostic accuracy rates of 64- and 256-slice CTCA were affected by the presence of stent (65% vs. 75%, respectively, p > 0.05) and severe calcifications (75% vs. 82%, respectively, p > 0.05). Conclusions: In two similar populations, 256-slice CTCA displayed superior diagnostic performance than 64-slice CTCA. However, the performance of 256-slide CTCA is affected in those segments that are severely calcified and/or stented.
|頁（從 - 到）||151-159|
|期刊||Acta Cardiologica Sinica|
|出版狀態||已發佈 - 三月 2013|
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
Chua, S. K., Hung, H. F., Cheng, J. J., Tseng, M. T., Law, W. Y., Kuo, C. J., Chiu, C. Z., Chang, C. M., Lee, S. H., Lo, H. M., Lin, S. C., Liou, J. Y., & Shyu, K. G. (2013). Diagnostic performance of 64-versus 256-slice computed tomography coronary angiography compared with conventional coronary angiography in patients with suspected coronary artery disease. Acta Cardiologica Sinica, 29(2), 151-159.