Evaluation of a biplanar diode array dosimeter for quality assurance of step-and-shoot IMRT.

Journal of Applied Clinical Medical Physics
Vladimir FeygelmanGorgen Nilsson

Abstract

In this paper, we described and characterized a novel biplanar diode array, and demonstrated its applicability to dosimetric QA of the step-and-shoot IMRT. It is the first commercially available device of its kind specifically designed for measurements at varying gantry angles. The detector consists of a cylindrical PMMA phantom with two orthogonal detector boards. There are a total of 1069 p-type 1 mm wide diode detectors covering the measurement area of 20 x 20 cm2 in each of the measurement planes. The orthogonal detector arrays ensure that the dose modulation information is not lost regardless of the beam incidence angle. For absolute calibration, the dose to the reference detector is calculated at the appropriate SSD and radiological depth by the treatment planning system and is scaled by the measured accelerator output. The directly measured rotational response on the central axis shows the maximum variation of approximately +/-3% in the narrow +/-1 degree angular intervals centered on the detector boards. This variation is reduced to less than +/- 2% outside of the four similarly centered +/-5 degrees angular intervals. For all detectors, the difference between the measured and calculated dose for a plan with twelve equa...Continue Reading

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Citations

Nov 4, 2011·Medical Physics·Daniel W BaileyMatthew B Podgorsak
Jul 27, 2012·Medical Physics·Benjamin E NelmsVladimir Feygelman
Aug 10, 2013·Medical Physics·Yoichi Watanabe, Yuji Nakaguchi
May 16, 2012·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)·Guangjun LiQingfeng Jiang
Feb 1, 2014·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)·M CozzolinoV Fusco
Jan 21, 2014·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Vladimir FeygelmanBenjamin E Nelms
Oct 1, 2011·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Antony CarverPhilip Mayles
Jan 11, 2012·Journal of Applied Clinical Medical Physics·Feliciano García-VicenteJuan J Torres
May 9, 2013·Journal of Applied Clinical Medical Physics·Alexander NevelskyAbraham Kuten
Apr 9, 2014·Journal of Applied Clinical Medical Physics·Cassandra StambaughVladimir Feygelman
May 31, 2017·Medical Physics·Nauljun StansookAnatoly B Rosenfeld
Sep 4, 2019·Journal of Applied Clinical Medical Physics·Saeed AhmedVladimir Feygelman
Aug 9, 2017·Physics in Medicine and Biology·Luis Isaac Ramos GarciaVerónica Moran-Velasco
Apr 27, 2019·Radiation Oncology·Yuxi PanJing Cai
Jul 1, 2020·Physics in Medicine and Biology·Anatoly B RozenfeldVladimir Feygelman
Nov 28, 2017·Physics in Medicine and Biology·J H W de VriesB W Raaymakers
May 23, 2018·Journal of Applied Clinical Medical Physics·Kensuke TaniHidetoshi Saitoh
Oct 15, 2019·Journal of Applied Clinical Medical Physics·Kananan UtitsarnAnatoly B Rosenfeld
May 19, 2011·Journal of Applied Clinical Medical Physics·Vladimir FeygelmanBenjamin E Nelms
Aug 19, 2010·Journal of Applied Clinical Medical Physics·Vladimir FaygelmanGeoffrey Zhang
May 19, 2011·Journal of Applied Clinical Medical Physics·Daniel OppVladimir Feygelman
Feb 18, 2010·Journal of Applied Clinical Medical Physics·Vladimir FeygelmanCraig Stevens
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May 19, 2011·Journal of Applied Clinical Medical Physics·Varatharaj ChandrarajNikos Papanikolaou
Jul 24, 2020·Physical and Engineering Sciences in Medicine·Min Cheol HanJin Sung Kim
Apr 27, 2021·Physics and Imaging in Radiation Oncology·Julia Götstedt, Anna Bäck
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