基于动态容积CT前瞻性心电门控对快心率冠状动脉CTA的观察  

The observation based on imaging of dynamic volume CT coronary angiography with prospective ECG-gated for fast heart rate patients

作　　者：马静[1] 赵雄[1] 杜向东[1] 方佳[1] 吴英[1] 宋法亮[1] 郑玉洁[1] 

机构地区：[1]石河子大学第二附属医院兵团医院医学影像科,新疆乌鲁木齐832000

出　　处：《实用放射学杂志》2016年第4期595-598,共4页Journal of Practical Radiology

基　　金：兵团科技攻关项目（2012AB015,2015AB022）.

摘　　要：目的 探讨心率＞70次/min的患者动态容积CT前瞻性心电门控技术的可行性。方法 收集118例心率＞70次/min患者的一般资料。所有患者行320容积扫描，前瞻性心电触发扫描模式，R波后250-400 ms多扇区采集，管电压100 kVp，自动管电流调节，对比剂采用碘克沙醇（370 mg I/mL）。记录所有患者的辐射剂量。将冠状动脉分为15个节段，由2名影像科医师测量冠状动脉CT值、图像评分。对结果进行统计学分析。结果 各组间性别、年龄、体质量无显著性差异。心律整齐，心率＞70次/min者满足诊断率83.05%。心率〉70次/min组、心率〉75次/min、心率〉85次/min组的图像主观评分分别为（4.23±0.72）分，（3.54±1.22）分， （1.87±0.74）分。各组间评分差异无统计学意义（F=5.125，P=0.050 3）。辐射剂量随心率增加。结论 动态容积CT采用前瞻性心电触发扫描模式，对心率＞70次/min患者行冠状动脉CT血管成像（CTA）检查可以得到满足临床诊断要求的图像质量。Objective To explore the feasibility of prospective ECG-gated dynamic volume CT coronary angiography performed on patients with heart rate greater than 70 beats per minute. Methods 118 patients with heart rate greater than 70 beats per minute were involved. All patients general data were collected. All the patients were scanned by 320 volume CT with prospective ECG-gated mode. Scanning was triggered by 250 ms-400 ms after R wave. 100 kVp tube voltage, tube current automatically adjustment, and iodine contrast agent （370 mg I/mL） were used. All patients＇ radiation dose were recorded. Coronary artery can be divided into 15 segments, coronary CT values were measured and evaluated by two radiologists. The results are statistically analyzed. Results There was no significant difference of gender, age and weight between the groups. The image quality of met diagnostic rate was 83.05%. Image subjective scores of groups（ heart rate 〉 70 beats per minute group, 〉 75 beats per minute group and 〉 85 beats per minute group） was 4. 23 ± 0. 72,3. 54±1.22,1.87±0. 74 espectively. There was no statistical difference in the groups （F=5. 125,P=0. 050 3）. Radiation dose was increaseed with heart rate increasing. Conclusion Image quality of CT coronary angiography of patients with heart rate greater than 70 beats per minute, performed by 320 row volumetric CT and using prospective ECG-gated scanning mode can satisfy clinical diagnosis requirement .

关 键 词：冠状动脉 前瞻性心电门控 计算机体层成像 血管造影术 动态容积 

分 类 号：R322.1[医药卫生—人体解剖和组织胚胎学] R814.43[医药卫生—基础医学]