Department of Medical Imaging, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
Kaohsiung J Med Sci. 2010 Jan;26(1):21-9. doi: 10.1016/S1607-551X(10)70004-8.
Accurate and consistent visualization of the entire coronary system with high-grade imaging quality is crucial for routine applications of multi-detector-computed tomography (MDCT) coronary angiography. To determine the imaging quality of 64-slice-MDCT coronary angiography, we respectively explored the quantitative parameters of imaging quality in 105 consecutive subjects (71 men, 34 women; aged 58.66 +/- 10.62 years) who underwent 64-slice-MDCT coronary angiography to screen for coronary disease. The interobserver agreement for semi-quantitative image quality, visible length, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the coronary arteries was good. The SNR and CNR of the proximal segments of the coronary arteries were superior to that of the distal segments of coronary arteries (p < 0.001). The visible length of the stenosed right coronary artery was significantly shorter than that of the non-stenosed right coronary artery (p = 0.03). The SNR and CNR of the stenosed and non-stenosed coronary arteries revealed no significant difference (p > 0.05). Body weight and body mass index were inversely related to the SNR and CNR of the aorta (p < 0.001). In conclusion, 64-slice-MDCT coronary angiography can provide excellent imaging quality of coronary arteries in subjects undergoing screening for coronary disease, although the SNR and CNR were relatively low at the distal segments of coronary arteries.
准确且一致地可视化整个冠状动脉系统对于多排螺旋 CT（MDCT）冠状动脉造影的常规应用至关重要。为了确定 64 层 MDCT 冠状动脉造影的成像质量，我们分别探讨了 105 例连续患者（71 名男性，34 名女性；年龄 58.66±10.62 岁）的成像质量定量参数，这些患者接受 64 层 MDCT 冠状动脉造影以筛查冠心病。冠状动脉的半定量图像质量、可视长度、信噪比（SNR）和对比噪声比（CNR）的观察者间一致性良好。冠状动脉近端节段的 SNR 和 CNR 优于冠状动脉远端节段（p<0.001）。狭窄的右冠状动脉的可视长度明显短于非狭窄的右冠状动脉（p=0.03）。狭窄和非狭窄的冠状动脉的 SNR 和 CNR 没有显著差异（p>0.05）。体重和体重指数与主动脉的 SNR 和 CNR 呈负相关（p<0.001）。总之，64 层 MDCT 冠状动脉造影可为接受冠心病筛查的患者提供出色的冠状动脉成像质量，尽管冠状动脉远端节段的 SNR 和 CNR 相对较低。
