Coronary angiography with dual source computed tomography: initial experience.
OBJECTIVE
To explore the scan technique and image quality of coronary angiography with dual source computed tomography (CT) without oral metoprolol preparation.


METHODS
Plain and enhanced dual source CT coronary angiography without oral metoprolol preparation was prospectively performed in 600 patients. Calcium scoring with plain scan images as well as multi-planar reconstruction (MPR), maximum intensity projection (MIP), and volume rendering technique (VRT) reconstruction with enhanced scan images were performed in all cases. The scan technique and post-reconstruction experience was summarized. The image quality was classified as 1 to 4 points, and coronary segments classified according to the American Heart Association standards were evaluated.


RESULTS
The average calcium score of the 600 cases was 213.6 +/- 298.7 (0-3,216.5). The average heart rate of the enhanced scan was 82.1 +/- 16.2 (47-139) bpm. The post-reconstruction methods with which coronary segments could be shown as best as possible consisted of single phase reconstruction method, two or more phases supplemented method, and electrocardiogram editing method. Altogether 8,457 coronary segments were evaluated, among which 97.2% were evaluated as point 1, 1.7% point 2, 0.5% point 3, and 0.6% point 4. The coronary segments in 261 cases were completely normal, while 360 segments were diagnosed with < 50% stenosis and 625 segments with > or = 50% stenosis.


CONCLUSIONS
Excellent coronary artery image can be obtained with dual source CT in patients with any heart rate without oral metoprolol preparation. Heart rate is not a major source of the artifact, coronary segments can be well shown with single or multiple-phase reconstruction method.
Zhang
Zhu-hua
ZH
Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing.
Jin
Zheng-yu
ZY
Zhang
Shu-yang
SY
Lin
Song-bai
SB
Li
Dong-jing
DJ
Kong
Ling-yan
LY
Wang
Yi-ning
YN
Song
Lan
L
Wang
Yun
Y
Zhao
Wen-min
WM
Mou
Wen-bin
WB
Zhang
Li-ren
LR
Zhu
Wen-ling
WL
Miao
Qi
Q
Fang
Qi
Q
D000328:Adult; D017023:Coronary Angiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*