Abstract：Objective: To evaluate the effect of low-dose coronary CT combined with Iterative Model Reconstruction on the image quality of coronary artery stent. Methods: Forty-six patients with PCI were recruited to undergo coronary CT angiography, with a total of 71 stents. CT scan parameters: Prospective ECG-gated scan, tube voltage 100 kV, tube current using automatic tube current debugging technology. The original data of the patient CT scan were reconstructed by filtered back projection(FBP), advanced mixed iteration(iDOSE4) and IMR. Three groups of reconstructed images were subjectively and objectively evaluated. Results: All patients were successfully completed. The noise(26.9±3.6) and the signal-to-noise ratio(16.5±2.9) of the IMR group were significantly better than those in the iDOSE4 group(54.6±9.2, 8.2±1.8) and FBP group(78.9±11.4, 5.6±1.1)(P<0.01). In the stent cavity display, the signal-to-noise ratio and contrast noise ratio in the IMR group were the highest, and those in the FBP group were the lowest. There was statistical difference between the two groups(P<0.01). IMR group had the highest subjective score. There was no significant difference between the IMR group and the iDOSE4 group in terms of diagnostic feasibility(P=0.08). Conclusion: Low-dose coronary CT combined with IMR has lower noise and higher signal-to-noise ratio, which is beneficial to the display of coronary stent cavity.
杜恒鑫，侯 阳，王一婧，马 跃. 全模型迭代重建技术对低剂量CT冠状动脉支架显示的初步研究[J]. 中国临床医学影像杂志, 2019, 30(1): 57-60.
DU Heng-xin, HOU Yang, WANG Yi-jing, MA Yue. A preliminary study of iterative model reconstruction technique combined with low-dose CT in coronary artery stent. JOURNAL OF CHINA MEDICAL IMAGING, 2019, 30(1): 57-60.
2019, Vol. 30 
