Radiation Protection Dosimetry Advance Access published online on February 3, 2006
Radiation Protection Dosimetry, doi:10.1093/rpd/nci717
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SCIENTIFIC AND TECHNICAL PAPER
1 Department of Radiology, Diakonissenkrankenhaus, Diakonissenstrasse 28, D-76199 Karlsruhe, Germany
* To whom correspondence should be addressed.
Radiation risk has to be justified and optimised. This study discusses the radiation risk of uterine artery embolisation (UAE) for the treatment of fibroids. A total of 70 consecutive UAE dosimetry parameters were assessed. Using Monte Carlo simulation, organ and effective doses and dose conversion coefficients (DCCs) (mSv Gy cm-2) were calculated. During UAE optimisation, avoidance of oblique views and use of last-image-hold (LIH) documentation instead of digital subtraction angiography (DSA) were investigated. Mean dose-area product (DAP) was 37.1 Gy cm2 (median 23.7 Gy cm2) and mean fluoroscopy time was 18.4 min (median 16.6 min). Dose values decreased as the study progressed: mean DAP for patients 1-21, 68.5 Gy cm2; patients 22-43, 35.7 Gy cm2; and patients 44-69, 13.0 Gy cm2. Average DCC for DSA image procedures was 0.572, yielding a mean effective dose of 29.6 mSv (median 17.1 mSv). For LIH-only procedures, an average DCC of 0.813 was estimated [using mean effective dose: 10.6 mSv (median 8.1 mSv)].
OPTIMISATION STRATEGIES AND JUSTIFICATION: AN EXAMPLE IN UTERINE ARTERY EMBOLISATION FOR FIBROIDS
S. Vetter 1 *,
F. W. Schultz 2,
E.-P. Strecker 1,
and
J. Zoetelief 2
2 Interfaculty Reactor Institute, Medical Physics, Delft University of Technology, NL-2629 JB Delft, The Netherlands
S. Vetter, E-mail: radiologie{at}diak-ka.de
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