Comparison of film dosimetry techniques used for quality assurance of intensity modulated radiation therapy

Medical Physics
Sang Gyu JuYong Chan Ahn

Abstract

Accurate dosimetry is essential to ensure the quality of advanced radiation treatments, such as intensity modulated radiation therapy (IMRT). Therefore, a comparison study was conducted to assess the accuracy of various film dosimetry techniques that are widely used in clinics. A simulated IMRT plan that produced an inverse pyramid dose distribution in a perpendicular plane of the beam axis was designed with 6 MV x rays to characterize the large contribution of scattered photons to low dose regions. Three film dosimetry techniques, EDR2, EDR2 with low-energy photon absorption lead filters (EDR2 WF), and GafChromic EBT, were compared to ionization chamber measurements as well as Monte Carlo (MC) simulations. The accuracy of these techniques was evaluated against the ionization chamber data. Two-dimensional comparisons with MC simulation results were made by computing the gamma index (gamma) with criteria ranging from 2% of dose difference or 2 mm of distance to agreement (2%/2 mm) to 4%/4 mm on the central vertical plane (20 x 20 cm2) of a square solid water phantom. Depth doses and lateral profiles at depths of 5, 10, and 15 cm were examined to characterize the deviation of film measurements and MC predictions from ionization c...Continue Reading

References

Apr 4, 2002·Medical Physics·Sang Gyu JuInhwan Jason Yeo
Feb 6, 2004·Medical Physics·Marta BuccioliniMarta Casati
Aug 13, 2004·Medical Physics·Inhwan Jason YeoMohammad Islam
Mar 26, 2005·Medical Physics·Nathan L ChildressIsaac I Rosen
Aug 27, 2005·Medical Physics·Slobodan DevicChristopher G Soares
Sep 24, 2005·Physics in Medicine and Biology·E SpeziA Ferri
Dec 1, 2006·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·A SankarJ Velmurugan
Dec 22, 2006·Physics in Medicine and Biology·L PaelinckC De Wagter
Jul 28, 2007·Medical Physics·Ellen E Wilcox, George M Daskalov
Aug 1, 2007·Physics in Medicine and Biology·Martina FussDietmar Georg
Feb 26, 2008·Medical Physics·Indra J DasAnders Ahnesjö
Apr 4, 2008·Medical Physics·Paolo FrancesconCarlo Cavedon
Apr 4, 2008·Medical Physics·J J Gordon, J V Siebers
Nov 19, 2008·Physics in Medicine and Biology·Mária MartisíkováOliver Jäkel
Jul 1, 2005·Medical Physics·Slobodan DevicChristopher G Soares

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Citations

Dec 15, 2010·The Journal of Sexual Medicine·Bridget F KoontzFang-Fang Yin
Nov 16, 2013·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)·J M Lárraga-GutiérrezP Ballesteros-Zebadúa
Dec 14, 2018·Physics in Medicine and Biology·V Grilj, D J Brenner

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