Determination of exit skin dose for 192Ir intracavitary accelerated partial breast irradiation with thermoluminescent dosimeters.

Medical Physics
Julie A RaffiLarry A DeWerd

Abstract

Intracavitary accelerated partial breast irradiation (APBI) has become a popular treatment for early stage breast cancer in recent years due to its shortened course of treatment and simplified treatment planning compared to traditional external beam breast conservation therapy. However, the exit dose to the skin is a major concern and can be a limiting factor for these treatments. Most treatment planning systems (TPSs) currently used for high dose-rate (HDR) 192Ir brachytherapy overestimate the exit skin dose because they assume a homogeneous water medium and do not account for finite patient dimensions. The purpose of this work was to quantify the TPS overestimation of the exit skin dose for a group of patients and several phantom configurations. The TPS calculated skin dose for 59 HDR 192Ir APBI patients was compared to the skin dose measured with LiF:Mg,Ti thermoluminescent dosimeters (TLDs). Additionally, the TPS calculated dose was compared to the TLD measured dose and the Monte Carlo (MC) calculated dose for eight phantom configurations. Four of the phantom configurations simulated treatment conditions with no scattering material beyond the point of measurement and the other four configurations simulated the homogeneous s...Continue Reading

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Citations

Jul 5, 2013·Medical Physics·Kari TanderupJoanna E Cygler
Aug 13, 2014·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Li-Min SunMin-Jen Tsao
Sep 9, 2016·Journal of Radiation Research·Hiroyuki OkamotoJun Itami
Jan 1, 2013·Journal of Applied Clinical Medical Physics·David Pearson, Eric A Williams
Jun 14, 2017·International Journal of Radiation Biology·Jony M GeraldoLídia M Andrade
Oct 2, 2019·Medical Physics·Stephen F KryDimitris Mihailidis
Mar 30, 2017·Physics in Medicine and Biology·Eleftherios P PappasPanagiotis Papagiannis
Oct 28, 2019·Australasian Physical & Engineering Sciences in Medicine·Z JamalludinN M Ung

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