I am trying to calculate the effective dose from a fluoroscopy procedure. I have the cumulative air kerma from the fluoroscopy procedure to effective dose. Can you recommend methods to do the calculation?
In angiography and interventional radiology, the effective dose (E) is estimated by multiplying the kerma area product (KAP) or dose area product (DAP) and a specific conversion coefficient (CC).
The KAP is simply average air kerma (in Gy) multiplied by the corresponding x-ray beam cross-sectional area (in cm2), the product of which being expressed as Gy · cm2.
So, E (mSv) = KAP (Gy · cm2) x CC (mSv Gy-1 · cm-2)) .
Coefficients for various procedures can be found in published tables. Good sources for CC are Hart et al. (1994) and Drexler et al. (1990).
Terry Yoshizumi, PhD, FAAPM, DABR, DABSNM, DABMP
References
Hart D, Jones DG, Wall BF. Estimation of effective dose in diagnostic radiology from entrance surface dose and dose-area product measurements. NRPB-R262 Chilton: NRPB; 1994. Accessed 30 September 2019.
Drexler G, Panzer W, Widenmann L, Williams G, Zankl M. The calculation of dose from external photon exposures using reference human phantoms and Monte-Carlo methods, part III: organ doses in x-ray diagnosis. GSF Report 11/90. Neuherberg: National Centre for Environment and Health 1–60; 1990.
Answer posted on 10 October 2019. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice. To the best of our knowledge, answers are correct at the time they are posted. Be advised that over time, requirements could change, new data could be made available, and Internet links could change, affecting the correctness of the answers. Answers are the professional opinions of the expert responding to each question; they do not necessarily represent the position of the Health Physics Society.