A study of surface dosimetry for breast cancer radiotherapy treatments using Gafchromic EBT2 film.

Journal of Applied Clinical Medical Physics
Masahiro NakanoZ Kuncic

Abstract

The present study quantified surface doses on several rectangular phantom setups and on curved surface phantoms for a 6 MV photon field using the Attix parallel-plate chamber and Gafchromic EBT2 film. For the rectangular phantom setups, the surface doses on a homogenous water equivalent phantom and a water equivalent phantom with 60 mm thick lung equivalent material were measured. The measurement on the homogenous phantom setup showed consistency in surface and near-surface doses between an open field and enhanced dynamic wedge (EDW) fields, whereas physical wedged fields showed small differences. Surface dose measurements made using the EBT2 film showed good agreement with results of the Attix chamber and results obtained in previous studies which used other dosimeters within the measurement uncertainty of 3.3%. The surface dose measurements on the phantom setup with lung equivalent material showed a small increase without bolus and up to 6.9% increase with bolus simulating the increase of chest wall thickness. Surface doses on the cylindrical CT phantom and customized Perspex chest phantom were measured using the EBT2 film with and without bolus. The results indicate the important role of the presence of bolus if the clinical...Continue Reading

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Citations

Sep 20, 2016·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·A S JagtapS D Dhole
Apr 25, 2017·Journal of Applied Clinical Medical Physics·Molham M EyadehKevin R Diamond
Jan 11, 2019·Journal of Applied Clinical Medical Physics·Anabela G DiasJoana Lencart
Jul 9, 2013·Radiation Oncology·Larissa ThompsonTarcísio Passos Ribeiro Campos
Jul 25, 2013·Physics in Medicine and Biology·Rongxiao ZhangBrian W Pogue
Mar 22, 2014·Australasian Physical & Engineering Sciences in Medicine·J E MoralesJ V Trapp
Apr 6, 2020·Medical Physics·Jin Dong ChoJung-In Kim
Sep 11, 2019·Australasian Physical & Engineering Sciences in Medicine·Martin ButsonRobin Hill
Jun 27, 2013·Australasian Physical & Engineering Sciences in Medicine·Rebecca MoylanTanya Kairn
Feb 21, 2013·Physics in Medicine and Biology·Peter K N Yu, Martin J Butson
Dec 25, 2015·Journal of Applied Clinical Medical Physics·Tatsiana A Reynolds, Patrick Higgins
Sep 30, 2020·Medical Physics·Azam Niroomand-RadMaria F Chan
Jun 2, 2020·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Mohammad Taghi Bahreyni ToossiCourtney Knaup

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