Dosimetric evaluation of Plastic Water Diagnostic-Therapy.

Journal of Applied Clinical Medical Physics
Ramani RamaseshanRobert Heaton

Abstract

High-precision radiotherapy planning and quality assurance require accurate dosimetric and geometric phantom measurements. Phantom design requires materials with mechanical strength and resilience, and dosimetric properties close to those of water over diagnostic and therapeutic ranges. Plastic Water Diagnostic Therapy (PWDT: CIRS, Norfolk, VA) is a phantom material designed for water equivalence in photon beams from 0.04 MeV to 100 MeV; the material has also good mechanical properties. The present article reports the results of computed tomography (CT) imaging and dosimetric studies of PWDT to evaluate the suitability of the material in CT and therapy energy ranges. We characterized the water equivalence of PWDT in a series of experiments in which the basic dosimetric properties of the material were determined for photon energies of 80 kVp, 100 kVp, 250 kVp, 4 MV, 6 MV, 10 MV, and 18 MV. Measured properties included the buildup and percentage depth dose curves for several field sizes, and relative dose factors as a function of field size. In addition, the PWDT phantom underwent CT imaging at beam qualities ranging from 80 kVp to 140 kVp to determine the water equivalence of the phantom in the diagnostic energy range. The dosim...Continue Reading

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Citations

Jul 8, 2011·Physics in Medicine and Biology·Tina GorjiaraClive Baldock
Apr 10, 2012·Medical Physics·M L TaylorR D Franich
Nov 18, 2011·Journal of Applied Clinical Medical Physics·Thomas FearonRobert W Miller
Aug 1, 2015·The British Journal of Radiology·Maria M Aspradakis, Paolo Zucchetti
Oct 1, 2010·Medical Physics·Robin HillClive Baldock
Oct 9, 2013·Physics in Medicine and Biology·Jongmin ChoOsama Mawlawi
Jun 2, 2011·Medical Physics·Tina GorjiaraClive Baldock
Apr 24, 2020·Medical Physics·Maduka M KaluarachchiEric E Klein
Oct 14, 2011·Medical Physics·Yida Hu, Timothy C Zhu
Mar 4, 2014·Physics in Medicine and Biology·Robin HillClive Baldock
Jan 15, 2021·Biomedical Physics & Engineering Express·Srilakshmi PrabhuS B Gudennavar
Sep 11, 2018·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Roger Cai Xiang SohJames Cheow Lei Lee
Apr 23, 2021·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)·Fujio Araki

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