PMID: 15377095Sep 21, 2004Paper

Effect of processing time delay on the dose response of Kodak EDR2 film

Medical Physics
Nathan L Childress, Isaac I Rosen

Abstract

Kodak EDR2 film is a widely used two-dimensional dosimeter for intensity modulated radiotherapy (IMRT) measurements. Our clinical use of EDR2 film for IMRT verifications revealed variations and uncertainties in dose response that were larger than expected, given that we perform film calibrations for every experimental measurement. We found that the length of time between film exposure and processing can affect the absolute dose response of EDR2 film by as much as 4%-6%. EDR2 films were exposed to 300 cGy using 6 and 18 MV 10 x 10 cm2 fields and then processed after time delays ranging from 2 min to 24 h. An ion chamber measured the relative dose for these film exposures. The ratio of optical density (OD) to dose stabilized after 3 h. Compared to its stable value, the film response was 4%-6% lower at 2 min and 1% lower at 1 h. The results of the 4 min and 1 h processing time delays were verified with a total of four different EDR2 film batches. The OD/dose response for XV2 films was consistent for time periods of 4 min and 1 h between exposure and processing. To investigate possible interactions of the processing time delay effect with dose, single EDR2 films were irradiated to eight different dose levels between 45 and 330 cGy ...Continue Reading

References

Jun 1, 2001·Physics in Medicine and Biology·N SuchowerskaP Metcalfe
Apr 4, 2002·Medical Physics·Sang Gyu JuInhwan Jason Yeo
Aug 8, 2002·Physics in Medicine and Biology·C MartensW De Neve
Oct 11, 2002·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·A KapulskyG Gejerman
Nov 1, 2002·Medical Physics·Nathan L ChildressIsaac I Rosen
Nov 1, 2002·Medical Physics·Jacqueline EsthappanDaniel A Low
Nov 16, 2002·Physics in Medicine and Biology·Indrin J Chetty, Paule M Charland
Dec 5, 2002·Medical Physics·Arthur J Olch
May 27, 2003·Physics in Medicine and Biology·Nesrin DoganBahman Emami
May 30, 2003·Medical Physics·X R ZhuM T Gillin
Oct 8, 2003·Medical Physics·Susan L RichardsonBhudatt R Paliwal
Nov 8, 2003·Journal of Applied Clinical Medical Physics·Patrick N McDermottA DeYoung
Feb 6, 2004·Medical Physics·Marta BuccioliniMarta Casati

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Citations

Oct 13, 2009·Journal of Huazhong University of Science and Technology. Medical Sciences = Hua Zhong Ke Ji Da Xue Xue Bao. Yi Xue Ying De Wen Ban = Huazhong Keji Daxue Xuebao. Yixue Yingdewen Ban·Qin LiZhiwen Liang
Jul 23, 2011·Medical Physics·Jan RødalEirik Malinen
Nov 4, 2005·Medical Physics·Todd PawlickiArthur L Boyer
Jul 11, 2006·The British Journal of Radiology·R E Morrell, A T Rogers
May 4, 2010·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·Dirk WolffFrank Lohr
Sep 20, 2011·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Shiv P Srivastava, Indra J Das
May 23, 2009·Zeitschrift für medizinische Physik·Frank SchneiderLoris Menegotti
Feb 3, 2009·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Moonseong OhMatthew B Podgorsak
Nov 28, 2006·International Journal of Radiation Oncology, Biology, Physics·Hualin ZhangRobert D Zwicker
Apr 28, 2011·Medical Physics·Daniel A LowMark Oldham
Jul 28, 2007·Medical Physics·Sujatha PaiUNKNOWN American Association of Physics in Medicine
Feb 22, 2005·Medical Physics·Nathan L ChildressIsaac I Rosen
Mar 26, 2005·Medical Physics·Nathan L ChildressIsaac I Rosen
May 18, 2005·Medical Physics·Nathan L ChildressIsaac I Rosen
May 2, 2008·Journal of Applied Clinical Medical Physics·Mohamed MetwalyAbdel Sattar Mohamed Sallam
Nov 18, 2006·Physics in Medicine and Biology·T GauerR Schmidt
Oct 21, 2005·Physics in Medicine and Biology·A DjouguelaB Poppe
Dec 17, 2005·Physics in Medicine and Biology·Ian Cowley, Simon Thomas
Dec 25, 2015·Journal of Applied Clinical Medical Physics·Indra YohannesChristoph Bert
Feb 24, 2005·Physics in Medicine and Biology·Rachel E Morrell, Andy Rogers
May 28, 2011·Physics in Medicine and Biology·B HundertmarkT Mackie
May 22, 2009·Journal of Applied Clinical Medical Physics·Ramaswamy SadagopanPeter A Balter

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