Online citations, reference lists, and bibliographies.

Monte Carlo Calculations Of Correction Factors For Plastic Phantoms In Clinical Photon And Electron Beam Dosimetry.

Fujio Araki, Yuji Hanyu, Miyoko Fukuoka, Kenji Matsumoto, Masahiko Okumura, Hiroshi Oguchi
Published 2009 · Physics, Medicine
Cite This
Download PDF
Analyze on Scholarcy
The purpose of this study is to calculate correction factors for plastic water (PW) and plastic water diagnostic-therapy (PWDT) phantoms in clinical photon and electron beam dosimetry using the EGSnrc Monte Carlo code system. A water-to-plastic ionization conversion factor k(pl) for PW and PWDT was computed for several commonly used Farmer-type ionization chambers with different wall materials in the range of 4-18 MV photon beams. For electron beams, a depth-scaling factor c(pl) and a chamber-dependent fluence correction factor h(pl) for both phantoms were also calculated in combination with NACP-02 and Roos plane-parallel ionization chambers in the range of 4-18 MeV. The h(pl) values for the plane-parallel chambers were evaluated from the electron fluence correction factor phi(pl)w and wall correction factors P(wall,w) and P(wall,pl) for a combination of water or plastic materials. The calculated k(pl) and h(pl) values were verified by comparison with the measured values. A set of k(pl) values computed for the Farmer-type chambers was equal to unity within 0.5% for PW and PWDT in photon beams. The k(pl) values also agreed within their combined uncertainty with the measured data. For electron beams, the c(pl) values computed for PW and PWDT were from 0.998 to 1.000 and from 0.992 to 0.997, respectively, in the range of 4-18 MeV. The phi(pl)w values for PW and PWDT were from 0.998 to 1.001 and from 1.004 to 1.001, respectively, at a reference depth in the range of 4-18 MeV. The difference in P(wall) between water and plastic materials for the plane-parallel chambers was 0.8% at a maximum. Finally, h(pl) values evaluated for plastic materials were equal to unity within 0.6% for NACP-02 and Roos chambers. The h(pl) values also agreed within their combined uncertainty with the measured data. The absorbed dose to water from ionization chamber measurements in PW and PWDT plastic materials corresponds to that in water within 1%. Both phantoms can thus be used as a substitute for water for photon and electron dosimetry.
This paper references
AAPM's TG-51 protocol for clinical reference dosimetry of high-energy photon and electron beams.
Peter Richard Almond (1999)
Monte Carlo study of correction factors for the use of plastic phantoms in clinical electron beams
Araki (2007)
BEAMnrc user's manual
D W O Rogers (2001)
Correction factors for plastic phantoms
F Araki
Dosimetric evaluation of Plastic Water Diagnostic Therapy
Ramani Ramaseshan (2008)
An empirical method for the determination of wall perturbation factors for parallel-plate chambers in high-energy electron beams.
Malcolm R. McEwen (2006)
Measurements of ionisation in water, polystyrene and a 'solid water' phantom material for electron beams.
David I. Thwaites (1985)
NRC User Codes for EGSnrc
David William Oliver Rogers (2010)
Calculations of electron fluence correction factors using the Monte Carlo code PENELOPE.
Erik Albert Siegbahn (2003)
Absorbed dose to water reference dosimetry using solid phantoms in the context of absorbed-dose protocols.
Jan Seuntjens (2005)
Characterization of the phantom material virtual water in high-energy photon and electron beams.
Malcolm R. McEwen (2006)
Tables and Graphs of Photon Mass Attenuation Coefficients and Mass Energy-Absorption Coefficients for Photon Energies 1 keV to 20 MeV for Elements Z = 1 to 92 and Some Dosimetric Materials
Stephen M. Seltzer (1995)
Wall correction factors, Pwall, for parallel-plate ionization chambers.
Lesley A. Buckley (2006)
The IPEM code of practice for electron dosimetry for radiotherapy beams of initial energy from 4 to 25 MeV based on an absorbed dose to water calibration.
David I. Thwaites (2003)
Correction factors for plastic phantoms code of practice
F Araki (1997)
Monte Carlo calculations of correction factors for plane-parallel ionization chambers in clinical electron dosimetry.
Fujio Araki (2008)
How water equivalent are water-equivalent solid materials for output calibration of photon and electron beams?
Victor M. Tello (1995)
BEAM: a Monte Carlo code to simulate radiotherapy treatment units.
Dennis Rogers (1995)
Correction factors for parallel-plate chambers used in plastic phantoms in electron dosimetry.
Bo R Nilsson (1997)
Wall effects in plane-parallel ionization chambers.
Bo R Nilsson (1996)
Stopping-power and mass energy-absorption coefficient ratios for Solid Water.
Ahn Kwang Ho (1986)
Implication of electron backscattering for electron dosimetry
S. C. Klevenhagen (1991)
Monte Carlo study of correction factors for the use of plastic phantoms in clinical electron dosimetry.
Fujio Araki (2007)
465 22C
F Rev (2001)
DOSXYZnrc user's manual
M Ma (2001)
Characterization of the water-equivalent material WTe for use in electron beam dosimetry.
Malcolm R. McEwen (2003)
An evaluation of epoxy resin phantom materials for electron dosimetry.
Andrew Nisbet (1998)
Absorbed dose determination in photon and electron beams: An international -15
Detour factors in water and plastic phantoms and their use for range and depth scaling in electron-beam dosimetry.
J. M. Fernández-Varea (1996)
Electron fluence correction factors for conversion of dose in plastic to dose in water.
George X. Ding (1997)
Electron backscatter corrections for parallel-plate chambers.
Margaret A. Hunt (1988)
Comparison of dose calculation algorithms in slab phantoms with cortical bone equivalent heterogeneities.
Pablo Carrillo Carrasco (2007)
Absorbed Dose Determination in External Beam Radiotherapy: An International Code of Practice for Dosimetry based on Standards of Absorbed Dose to Water
Pedro Andreo (2001)

This paper is referenced by
Dosimetric properties of a Solid Water High Equivalency (SW557) phantom for megavoltage photon beams.
Fujio Araki (2017)
Dosimetric characterization of a rigid, surface-contour-specific thermoplastic bolus material.
Jessica M. Fagerstrom (2019)
Density scaling of phantom materials for a 3D dose verification system
Kensuke Tani (2018)
Analysis of water-equivalent materials used during irradiation in the clinic with XCOM and BEAMnrc
Taylan Tuğrul (2019)
Application of FLUKA code to gamma-ray attenuation, energy deposition and dose calculations
Nilgun Demir (2017)
A new standard cylindrical graphite-walled ionization chamber for dosimetry in 60Co beams at calibration laboratories
Lucio Pereira Neves (2014)
Determination of RW3-to-water mass-energy absorption coefficient ratio for absolute dosimetry
Katrina Y. T. Seet (2011)
Water equivalence of some plastic-water phantom materials for clinical proton beam dosimetry.
Latifa Al-Sulaiti (2012)
Backscatter correction factor for megavoltage photon beam.
Yida Hu (2011)
Validation of an electron Monte Carlo dose calculation algorithm in the presence of heterogeneities using EGSnrc and radiochromic film measurements
Jean-François Aubry (2011)
Monte Carlo study of conversion factors for ionization chamber dosimetry in solid slab phantoms for MV photon beams
Dong Wook Park (2016)
Depth scaling of solid phantom for intensity modulated radiotherapy beams.
Yukio Fujita (2010)
Semantic Scholar Logo Some data provided by SemanticScholar