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http://dx.doi.org/10.7742/jksr.2012.6.2.129

Comparison of Radiation Doses between 64-slice Single Source and 128-slice Dual Source CT Coronary Angiography in patient  

Kang, Yeong-Han (Department of Diagnostic Radiology, Daegu Catholic University Hospital)
Publication Information
Journal of the Korean Society of Radiology / v.6, no.2, 2012 , pp. 129-136 More about this Journal
Abstract
The purpose of this study was to estimate radiation doses from 64-slice single source Computed Tomography(SSCT) coronary angiography(CA) and 128-slice dual source Computed Tomography(DSCT). With SSCT CA, the effective dose averaged approximately 13.86 mSv when two dose modulation was not. The mean effective dose for DSCT CA with retrospectively gated helical(RGH) technique was 11.87 mSv, when prospective ECG gating transverse(PGT) without dose modulation technique was 5.61 mSv. The one with dose modulation in PGT technique and flash mode were 3.04 mSv and flash mode was 0.98 mSv respectively. The lifetime attributable risk(LAR) of cancer incidence from SSCT RGH mode averaged approximately 1 for 1,176, and DSCT averaged 1 for 1,960(RGH mode), 1 for 3,030(PGT without modulation), 1 for 5,882(PGT with modulation). Because of CTCA is associated with non-negligible risk of cancer. Doses can be reduced by application PGT, FLASH than RGH using DSCT.
Keywords
64-slice single source CT; 128-dual source CT; Effective dose; Lifetime attributable risk;
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