Calculation of conversion factors for effective dose for various interventional radiology procedures

Medical Physics
Gaetano CompagnoneRita Golfieri

Abstract

To provide dose-area-product (DAP) to effective dose (E) conversion factors for complete interventional procedures, based on in-the-field clinical measurements of DAP values and using tabulated E/DAP conversion factors for single projections available from the literature. Nine types of interventional procedures were performed on 84 patients with two angiographic systems. Different calibration curves (with and without patient table attenuation) were calculated for each DAP meter. Clinical and dosimetric parameters were recorded in-the-field for each projection and for all patients, and a conversion factor linking DAP and effective doses was derived for each complete procedure making use of published, Monte Carlo calculated conversion factors for single static projections. Fluoroscopy time and DAP values for the lowest-dose procedure (biliary drainage) were approximately 3-fold and 13-fold lower, respectively, than those for the highest-dose examination (transjugular intrahepatic portosystemic shunt, TIPS). Median E/DAP conversion factors from 0.12 (abdominal percutaneous transluminal angioplasty) to 0.25 (Nephrostomy) mSvGy(-1) cm(-2) were obtained and good correlations between E and DAP were found for all procedures, with R(2) ...Continue Reading

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Citations

Jan 31, 2016·PM & R : the Journal of Injury, Function, and Rehabilitation·Daniel M CushmanZachary L McCormick
Nov 18, 2015·Journal of Vascular and Interventional Radiology : JVIR·Tyler McKaySiddharth A Padia
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Apr 5, 2014·Imaging Science in Dentistry·Dong-Soo KimEun-Kyung Kim
Mar 2, 2019·Physics in Medicine and Biology·Wanli HuoX George Xu
Nov 2, 2020·Annals of Hepatology·Matteo RenzulliRita Golfieri
Apr 15, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Wilbur K S FumLi Kuo Tan

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