[Initial application of coronary images from 320-slice dynamic volume MDCT].
OBJECTIVE
To evaluate initial application of coronary images from 320-slice dynamic volume MDCT (Toshiba Aquilion One dynamic volume MDCT).


METHODS
180 consecutive patients with suspected coronary artery disease were studied by ECG-gated 320-slice dynamic volume MDCT with non-helical scanning mode in our hospital from November, 2008 to January, 2009. 14 patients also underwent conventional coronary angiography. Images were retrospectively reconstructed under volume rendering technology, maximum intensity projection, multiplanar reconstruction and curved planar reformation. Image quality was analyzed in axial 320-detector row images through the mid-RCA. Sensitivity, specificity, positive and negative predictive value of > or = 50% stenosis were calculated.


RESULTS
145 (80.56%) cases had excellent images at average heart rate of 63 bpm.25 (13.89%) cases had good images at average heart rate of 78 bpm.8 (4.44%) cases had acceptable images at average heart rate of 85 bpm.2 (1.11%) cases had unevaluable images at average heart rate of 96 bpm. No stair-step artifact was found. 40 segments with > or = 50% stenosis were shown in CTA, while 37 segment in CAG. The sensitivity, specificity, positive and negative predictive value of the 320 slice DMCT in detecting coronary artery stenosis > or = 50% were 94.59%, 94.80%, 87.50% and 98.82% respectively.


CONCLUSIONS
Coronary images from 320-slice dynamic volume MDCT with wide area detector and non-helical scanning mode have excellent quality and less artifacts.320-slice coronary CT angiography provides high sensitivity and specificity in detecting coronary artery stenosis.
Qin
Jie
J
Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
Zhu
Kang-shun
KS
Liu
Ling-yun
LY
Chen
Jun-wei
JW
Chen
Xiu-zhen
XZ
Shan
Hong
H
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017023:Coronary Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*