Radiation exposure during cardiac CT: Effective doses at multi-detector row CT and electron-beam CT
Radiation exposure during cardiac CT: Effective doses at multi-detector row CT and electron-beam CT
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DOI：
10.1148/radiol.2261011365
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发表时间：
2003-01-01
期刊：
影响因子：
19.7
通讯作者：
Barkhausen, J
中科院分区：
文献类型：
--
作者：
Hunold, P;Vogt, FM;Barkhausen, J
目得：测量电子束计算机断层扫描（CT）和多排螺旋CT冠状动脉的有效辐射剂量，并比较这些剂量与导管冠状动脉angiography.MATERIALS和METHODS：一个拟人化的幻影配备66热释光剂量计在心脏CT成像。模拟了四种非增强冠状动脉钙评分方案：一种采用电子束CT，三种采用多排CT。模拟了四种相似的冠状动脉CT血管造影方案。所有多排螺旋CT方案均采用回顾性心电图触发。还模拟了双平面导管冠状动脉造影。根据国际放射防护委员会第60号出版物中的指南，测量各器官的辐射剂量，计算有效剂量。结果：电子束CT冠状动脉钙化积分得出的有效辐射剂量，男性为1.0 mSv，女性为1.3 mSv。采用多排CT进行钙评分时的辐射剂量，男性患者为1.5-5.2 mSv，女性患者为1.8-6.2 mSv。电子束CT、冠状动脉造影对男性和女性患者的有效剂量分别为1.5和2.0 mSv。在多探测器行CT血管造影术中输送的最高有效剂量：男性患者为6.7-10.9 mSv，女性患者为8.1-13.0 mSv。导管冠状动脉造影产生的有效剂量为2.1和2.5毫希的男性和女性patients.CONCLUSION：更高的辐射剂量提供在多探测器行心脏CT相比，在电子束CT和导管冠状动脉造影提供的剂量。(C)RSNA，2002年。
PURPOSE: To measure the effective radiation doses delivered at electron-beam computed tomography (CT) and multi-detector row spiral CT of coronary arteries and to compare these doses with those delivered at catheter coronary angiography.MATERIALS AND METHODS: An anthropomorphic phantom equipped with 66 thermoluminescent dosimeters was imaged at cardiac CT. Four protocols for un-enhanced coronary artery calcium scoring were simulated: one with electron-beam CT and three with multi-detector row CT. Four similar protocols for coronary CT angiography were simulated. All multi-detector row spiral CT protocols were performed with retrospective electrocardiographic triggering. Biplane catheter coronary angiography also was simulated. Radiation doses to organs were measured, and effective doses were calculated according to guidelines published in International Commission on Radiological Protection Publication 60.RESULTS: Coronary artery calcium scoring with electron-beam CT yielded effective radiation doses of 1.0 and 1.3 mSv for male and female patients, respectively. The radiation doses at calcium scoring with multi-detector row CT were 1.5-5.2 mSv for male patients and 1.8-6.2 mSv for female patients. Electron-beam CT, coronary angiography yielded effective doses of 1.5 and 2.0 mSv for male and female patients, respectively. The highest effective doses were delivered at multi-detector row CT angiography: 6.7-10.9 mSv for male patients and 8.1-13.0 mSv for female patients. Catheter coronary angiography yielded effective doses of 2.1 and 2.5 mSv for male and female patients, respectively.CONCLUSION: Higher radiation doses are delivered at multi detector row cardiac CT compared with the doses delivered at electron-beam CT and catheter coronary angiography. (C) RSNA, 2002.