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http://dx.doi.org/10.17946/JRST.2016.39.4.07

Analysis on the Entrance Surface Dose and Contrast Medium Dose at Computed Tomography and Angiography in Cardiovascular Examination  

Seo, Young-Hyun (Department of Cardiovascular Center, Yeocheon Jeonnam Hospital)
Han, Jae-Bok (Department of Radiological Science, Dongshin University)
Choi, Nam-Gil (Department of Radiological Science, Dongshin University)
Song, Jong-Nam (Department of Radiological Science, Dongshin University)
Publication Information
Journal of radiological science and technology / v.39, no.4, 2016 , pp. 535-541 More about this Journal
Abstract
This study aimed to identify dose reduction measures by retrospectively analyzing the entrance surface dose at computed tomography and angiography in cardiovascular examination and to contribute the patients with renal impairmend and a high probability of side effects to determine the inspection's direction by measuring the contrast usages actually to active actions for the dose by actually measuring the contrast medium dose. The CTDIvol value and air kerma value, which are the entrance surface doses of the two examinations, and the contrast medium dose depending on the number of slides were compared and analyzed. This study was conducted in 21 subjects (11 males; 10 females) who underwent Cardiac Computed Tomographic Angiography (CCTA) and Coronary Angiography (CAG) in this hospital during the period from May 2014 to May 2016. The subject's age was 48~85 years old (mean $65{\pm}10$ years old), and the weight was 37.6~83.3 kg (mean $63{\pm}6kg$). Dose reduction could be expected in the cardiovascular examination using CCTA rather than in the examination using CAG. In terms of contrast medium dose, CAG used a smaller dose than CCTA. In particular, as the number of slides increases at CAG, the contrast medium dose increases. Therefore, in order to reduce the contrast medium dose, the number of slides suitable for the scan range must be selected.
Keywords
Entrance surface dose; Contrast medium dose; Dose reduction;
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