Comparison of radiation doses from multislice computed tomography coronary angiography and conventional diagnostic angiography
Comparison of radiation doses from multislice computed tomography coronary angiography and conventional diagnostic angiography
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DOI：
10.1016/j.jacc.2005.11.078
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发表时间：
2006-05-02
影响因子：
24
通讯作者：
Baumbach, A
中科院分区：
文献类型：
--
作者：
Coles, DR;Smail, MA;Baumbach, A
目的本研究的目的是使用16层扫描仪量化和比较常规冠状动脉造影术和多层螺旋CT冠状动脉造影术的有效剂量。然而，对于任何电离辐射的诊断用途，必须考虑到患者的风险并证明其合理性。方法对180例可疑冠心病患者进行多层螺旋CT血管成像和常规血管成像。有效剂量的估计是根据每次患者检查记录的暴露数据得出的。结果在91例可直接对照的患者中，MSCT冠状动脉造影术的平均有效剂量为14.7mSv(SD 2.2)，常规冠状动脉造影术的平均有效剂量为5.6mSv(SD 3.6)。两种方案的有效剂量有显著差异。结论MSCT冠状动脉造影的平均有效剂量明显高于常规冠状动脉造影。随着MSCT心脏扫描仪的普及，操作员必须意识到辐射剂量及其影响因素。
OBJECTIVES The aim of this study was to quantify and compare effective doses from conventional angiography and multislice computed tomography (MSCT) coronary angiography using a 16-slice scanner.BACKGROUND Multislice computed tomography is now a viable modality for cardiac imaging. However, for any diagnostic use of ionizing radiation, the risk to the patient must be considered and justified.METHODS Multislice computed tomography angiography and conventional angiography were used to assess 180 patients with suspected coronary artery disease. Estimates of effective dose were derived from exposure data recorded for each patient examination. For each modality, a comparable calculation technique was used, based on Monte Carlo modeling of the standard Cristy phantom.RESULTS In a subset of 91 directly comparable patients the mean effective dose for MSCT coronary angiography was 14.7 mSv (SD 2.2) and that for conventional angiography was 5.6 mSv (SD 3.6). A significant difference in effective dose was seen between the two protocols.CONCLUSIONS The mean effective dose for MSCT coronary angiography was significantly higher than that for conventional angiography. As MSCT cardiac scanners become increasingly available, operators must be aware of the radiation dose and the factors that affect it.