Comparison of Radiation Doses From Multislice Computed Tomography Coronary Angiography and Conventional Diagnostic Angiography

Abstract

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.

Radiation dose and cancer risk estimates in 16-slice computed tomography coronary angiography

“…Consistent with this, Figure 1 demonstrates a marked variability between patients in the doses to individual organs. Es here were lower than those in another recent report using 16-slice CTCA by Cole et al 6 , despite the fact that the two studies employed similar tube current, tube voltage, and pitch. A notable difference between the two studies was the employment of ECTCM in 66% of patients in this study.…”

Decision Analytic Model for Evaluation of Suspected Coronary Disease with Stress Testing and Coronary CT Angiography

“…19 The effective dose for diagnostic cardiac catheterization was set at 7mSv for the base analysis, but was varied down to 5mSv for the sensitivity analysis. 20,21 Imaging/testing costs were computed as a combination of professional and technical fees as reported in table 3. For the purpose of cost comparisons, we refer to these costs as imaging costs even though the stress ECG study does not include …”

Transitioning from 16-slice to 64-slice multidetector computed tomography for the assessment of coronary artery disease: Are we really making progress?

“…Thus far, most studies have yielded effective radiation dose values of 6 mSv to 16 mSv for 16-slice scanners and 11 mSv to 21 mSv for 64-slice scanners, compared with approximately 6 mSv for CCA (75)(76)(77). In practical terms, the National Council on Radiation Protection and Measurements identifies a risk factor for lifetime cancer mortality of 5×10 -2 per 1 Sv exposure, which, given the above data, translates into a risk of inducing a fatal cancer of 0.05% to 0.11% for each 64-slice MDCT and 0.03% for each CCA (1).…”