Brought to you by
ECR 2013 / C-0876
Radiation dose reduction in cardiovascular CT angiography with latest generation dose-saving scanner technology
Congress: ECR 2013
Poster No.: C-0876
Type: Scientific Exhibit
Keywords: Cardiac, Cardiovascular system, Radiation physics, CT, CT-Angiography, Dosimetry, Radiation safety, Technical aspects
Authors: F. Nensa, M. Reinboldt, L. Hemsing, O. H. W. Bruder, K. Nassenstein, T. Schlosser; Essen/DE
DOI:10.1594/ecr2013/C-0876

Results

Mean ED for CTCA was 10.57±2.76 mSv on the SSCT scanner, 6.96±3.59 mSv on the DSCT standard scanner compared to 1.19±0.66 mSv on the Flash scanner (SSCT vs. DSCT t-Test: p<0.001, DSCT vs. Flash t-Test p<0.001). Compared to SSCT, mean dose reduction with Flash was >88% (>82% compared to DSCT). 72% (66/92) of all examinations on the Flash scanner had an ED < 1 mSv.

Using mutivariate regression analysis the acquistion mode (Flash-Helix vs. Gated-Helix; -6.48 mSv; p<0.001), the body mass index (BMI; 0.24 mSv per kg/m2 increase; p<0.001) and the total scan length along the longitudinal axis of the patients (0.41 mSv per cm increase; p<0.001) were identified as unique predictors of estimated dose. In a subgroup of Gated-Helix acquisitions also the Hounsfield units (HU) measured with a region of interest in the lumen of the thoracic aorta were negatively correlated with estimated dose (R=-0.38; p<0.001).

Regardless of the scanner, image quality was rated as diagnostic in all CTCAs. However, the average image quality was rated best on the Flash scanner.

POSTER ACTIONS Add bookmark Contact presenter Send to a friend Download pdf
SHARE THIS POSTER
2 clicks for more privacy: On the first click the button will be activated and you can then share the poster with a second click.

This website uses cookies. Learn more