前瞻性心电门控结合冠状动脉追踪冻结技术在高心率冠状动脉CT成像中的应用

发布时间：2018-03-01 05:03

本文关键词： 体层摄影术 X线计算机辐射剂量人体质量指数　出处：《中国医学影像技术》2015年06期 　论文类型：期刊论文

【摘要】：目的探讨前瞻性心电门控结合冠状动脉追踪冻结(SSF)技术对快心率患者降低辐射剂量及保证图像质量的价值。方法60例患者接受前瞻性心电门控扫描,心率为73~80次/分。根据患者体质量指数选择管电流为230~750mA,管电压为100~120kV。扫描后分别采用SSF重建及不采用SSF重建。计算患者的有效剂量(ED),并将其与回顾性心电门控螺旋扫描参数模拟计算的ED进行对比。采用美国心脏学会冠状动脉分段方法对其图像质量评分。结果前瞻性心电门控结合SSF技术与不结合SSF技术的冠状动脉图像质量评分分别为(3.41±0.59)分和(2.55±1.45)分(P0.05)。前瞻性心电门控结合SSF技术与回顾性心电门控成像的ED分别为(4.86±0.80)mSv和(15.80±2.50)mSv(P0.05)。结论前瞻性心电门控结合SSF技术可明显减少辐射剂量,并同时获得满足临床诊断需要的图像质量。
[Abstract]:Objective to evaluate the value of prospective ECG gating combined with coronary artery tracking freezing (SSF) in reducing radiation dose and ensuring image quality in patients with fast heart rate. The heart rate was 73.80 beats / min. According to the patient's body mass index, the tube current was 230V 750mA and the tube voltage was 100V. After scanning, SSF reconstruction and non-#en1# reconstruction were used respectively. The effective dose was calculated and compared with the retrospective ECG gated spiral. The image quality was evaluated by the American Heart Association coronary artery segmentation method. Results prospective ECG gating combined with SSF and uncombined SSF techniques were used to evaluate the image quality of coronary artery. The scores were 3.41 卤0.59) and 2.55 卤1.45, respectively. The Ed of prospective ECG gating combined with SSF and retrospective ECG gated imaging were 4.86 卤0.80 mSv and 15.80 卤2.50 mSv respectively. Conclusion prospective ECG gating combined with SSF can significantly reduce radiation dose. At the same time, the image quality to meet the needs of clinical diagnosis was obtained.
【作者单位】：北京电力医院放射科;
【分类号】：R816.2

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