双源CT冠脉成像不同扫描方法的辐射剂量比较

双源CT冠脉成像不同扫描方法的辐射剂量比较

吴伟峰;翟利浩;张建军;徐晓斌;牟彩云;刘铁

【期刊名称】《浙江医学》 【年(卷),期】2011(033)009

【摘要】目的 比较双源CT前瞻性心电门控扫描与应用不同管电压回顾性心电门控扫描的冠脉成像质量和患者的辐射剂量.方法 对23例心率＜70次/min且心率波动＜5次/min的患者采用前瞻性心电门控,55例心率不齐或＞70次/min的患者采用按体重指数 (BMI)不同而改变管电压的回顾性心电门控.并随机抽取30例采用常规回顾性心电门控CT冠脉成像(不变动管电压)的患者作为对照组.由两位放射科医师对图像独立进行质量评价,同时对患者的辐射剂量进行统计.结果 前瞻性心电门控冠脉成像与按患者的BMI指数应用不同管电压的回顾性心电门控冠脉成像的质量均能满足临床诊断要求.前瞻性心电门控冠脉成像的辐射剂量较回顾性心电门控下降了约60%～70%,降低管电压也可使辐射剂量明显下降,差异有统计学意义 (P＜0.05).结论 在保证冠脉成像质量的前提下,根据患者的自身情况制定最合适的检查方案,能够切实降低患者的辐射剂量.%Objective To compare the image quality and radiation dose of dual- source CT (DSCT) coronary angiography with prospective electrocardiography- gated (ECG- gated) adaptive cardiac sequence mode and retrospective ECG- gated in different tube voltage. Methods Twenty three patients with mean heart rate ＜ 70bpm and HR variation ＜ 5bpm were scanned by prospective ECG- gated adaptive cardiac sequence mode (prospective group) and 55 patients with arrhythmia or

mean heart rate ＞ 70bpm were scanned with retrospective ECG-gated mode by different tube voltage based on BMI of patients (retrospective group). And 30 patients undergoing conventional retrospective ECG-gated CT coronary angiography were randomly chosen as control groups. The image quality and radiation dose were analyzed independently by two radiologists. Results There were no significant differences in scores of image quality between prospective group and retrospective group. Compared to retrospective group the radiation dose of prospective group was decreased by 60％～70％ (P＜ 0.05). In retrospective group the radiation dose was also decreased with reducing tube voltage (P＜0.05). Conclusion To ensure the image quality and to reduce the radiation dose for patients it is necessary to use appropriate scan mode for DSCT coronary angiography. 【总页数】4页(1269-1271,1274)

【关键词】双源CT;冠状动脉成像;辐射剂量;体重指数 【作者】吴伟峰;翟利浩;张建军;徐晓斌;牟彩云;刘铁

【作者单位】310013,浙江医院放射科;310013,浙江医院放射科;310013,浙江医院放射科;310013,浙江医院放射科;310013,浙江医院放射科;310013,浙江医院放射科

【正文语种】中文 【中图分类】 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_zhejiang-medical-journal_thesis/0201255020434.html 【相关文献】

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