Development and testing of an improved dosimetry system using a backscatter shielded electronic portal imaging device

Medical Physics
Brian W KingPeter B Greer

Abstract

To investigate the properties of a modified backscatter shielded electronic portal imaging device (BSS-EPID) and to develop a dose model to convert BSS-EPID images to dose in water as part of an improved system for dosimetry using EPIDs. The effectiveness of the shielding of the BSS-EPID was studied by comparing images measured with the BSS-EPID mounted on the support arm to images measured with the BSS-EPID removed from the support arm. A dose model was developed and optimized to reconstruct dose in water at different depths from measured BSS-EPID images. The accuracy of the dose model was studied using BSS-EPID images of 28 IMRT fields to reconstruct dose in water at depths of 2, 5, 10, and 20 cm and comparing to measured dose in water from a two-dimensional diode array at the same depths. The ability of the BSS-EPID system to operate independently of detector position was demonstrated by comparing the dose reconstruction of a 10 × 10 cm(2) field using different detector offsets to that measured by a two-dimensional diode array. The shielding of the BSS-EPID was found to be effective, with more than 99% of pixels showing less than 0.5% change due to the presence of the support arm and at most a 0.2% effect on the central axis...Continue Reading

References

Jun 3, 1998·Medical Physics·D A LowJ A Purdy
Sep 29, 1999·Medical Physics·Y El-MohriJ H Siewerdsen
Jan 10, 2004·Medical Physics·B WarkentinB G Fallone
Mar 19, 2004·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Daniel LétourneauJohn W Wong
Apr 28, 2004·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Ann Van EschDominique Pierre Huyskens
May 22, 2004·Physics in Medicine and Biology·Lung KoJeffrey V Siebers
Aug 13, 2004·Medical Physics·Jeffrey V SiebersRadhe Mohan
Mar 26, 2005·Medical Physics·S SteciwB G Fallone
May 7, 2005·Physics in Medicine and Biology·Joseph A Moore, Jeffrey V Siebers
Jun 9, 2005·Journal of Applied Clinical Medical Physics·Patrick CadmanKarl Bzdusek
Jan 20, 2006·Journal of Applied Clinical Medical Physics·Wendel Dean RennerTimothy Holmes
Mar 15, 2006·Medical Physics·Markus WendlingBen J Mijnheer
Mar 19, 2009·Medical Physics·Peter B GreerKarl Bzdusek
Apr 22, 2009·Medical Physics·Christopher LeePeter B Greer
May 29, 2009·Medical Physics·K Chytyk, B M C McCurdy
Aug 14, 2009·Medical Physics·Markus WendlingBen J Mijnheer
Jul 17, 2010·Medical Physics·Sean L BerryCheng-Shie Wuu
Oct 22, 2010·Physics in Medicine and Biology·Pejman RowshanfarzadPeter B Greer
Nov 1, 2011·Australasian Physical & Engineering Sciences in Medicine·B W KingP B Greer

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Citations

May 3, 2013·Medical Physics·Daniel W BaileyMatthew B Podgorsak
Jul 5, 2013·Medical Physics·Brian W King, Peter B Greer
Dec 11, 2014·Journal of Applied Clinical Medical Physics·Song WangJenghwa Chang
Jan 1, 2019·Journal of Applied Clinical Medical Physics·Narges MiriPeter B Greer
Aug 5, 2014·Physics in Medicine and Biology·Mark PodestaFrank Verhaegen
Dec 9, 2016·Journal of Applied Clinical Medical Physics·Narges MiriPeter Greer
Mar 2, 2017·Physics in Medicine and Biology·Narges MiriPeter B Greer
May 25, 2021·Journal of Applied Clinical Medical Physics·Juan-Francisco Calvo-OrtegaJoan Casals-Farran

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