Abstract：Objective To study the value of coronary snap shot freeze (SSF) technology in reducing radiation dosage in prospective
ECG-gated CTA imaging. Methods A total of 50 patients received CTA imaging, with mean heart rate of (76.5±10.2) times/min,
were included in this study. The prospective ECG gating was used during SSF scan by 64 rows, 128 floors Optima CT 680 scanner
that. The differences of image quality, image noise, CT dose index volume (CTDIvol), dose length product (DLP) and effective dose
(ED) between two different algorithms (standard, STD) and SSF were compared. Results The coronary segmental curved planar
reformation (CPR), total volume rendering (VR) and CPR in CTA imaging of ≤65 bpm and between 65 and 85 bpm groups with
SSF were all significantly better than that of STD method. However, the image noise, CTDIvol, DLP and ED were all lower than that
of STD method (P<0.05). Conclusion SSF is effective for patients with less than 85 bpm on improvement of prospective ECG-gated
CTA imaging quality, reduce image noise and radiation dosage.
杨文兵，查云飞，阳朝晖，谢宝君，邢栋，杨仁杰. 冠状动脉追踪冻结技术降低前瞻性心电门控CTA成像辐射剂量的方法研究[J]. 中国医疗设备, 2018, 33(4): 69-73.
YANG Wenbing, ZHA Yunfei, YANG Chaohui, XIE Baojun, XING Dong, YANG Renjie. Study of Coronary Snap Shot Freeze Technology in Reducing Radiation
Dosage with Prospective ECG-Gated CTA Imaging. China Medical Devices, 2018, 33(4): 69-73.
