skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Brachytherapy dosimetry parameters calculated for a {sup 131}Cs source

Abstract

A comprehensive analysis of the IsoRay Medical model CS-1 Rev2 {sup 131}Cs brachytherapy source was performed. Dose distributions were simulated using Monte Carlo methods (MCNP5) in liquid water, Solid{sup TM}, and Virtual Water{sup TM} spherical phantoms. From these results, the in-water brachytherapy dosimetry parameters have been determined, and were compared with those of Murphy et al. [Med. Phys. 31, 1529-1538 (2004)] using measurements and simulations. Our results suggest that calculations obtained using erroneous cross-section libraries should be discarded as recommended by the 2004 AAPM TG-43U1 report. Our {sub MC}{lambda} value of 1.046{+-}0.019 cGy h{sup -1} U{sup -1} is within 1.3% of that measured by Chen et al. [Med. Phys. 32, 3279-3285 (2005)] using TLDs and the calculated results of Wittman and Fisher [Med. Phys. 34, 49-54 (2007)] using MCNP5. Using the discretized energy approach of Rivard [Appl. Radiat. Isot. 55, 775-782 (2001)] to ascertain the impact of individual {sup 131}Cs photons on radial dose function and anisotropy functions, there was virtual equivalence of results for 29.461{<=}E{sub {gamma}}{<=}34.419 keV and for a mono-energetic 30.384 keV photon source. Comparisons of radial dose function and 2D anisotropy function data are also included, and an analysis of material composition and cross-section libraries was performed.

Authors:
 [1]
  1. Department of Radiation Oncology, Tufts-New England Medical Center, Tufts University School of Medicine, Box 246, 750 Washington Street, Boston, Massachusetts 02111 (United States)
Publication Date:
OSTI Identifier:
20951064
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Physics; Journal Volume: 34; Journal Issue: 2; Other Information: DOI: 10.1118/1.2432162; (c) 2007 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; ANISOTROPY; BRACHYTHERAPY; CESIUM 131; DOSIMETRY; KEV RANGE 10-100; MONTE CARLO METHOD; NUCLEAR DATA COLLECTIONS; PHANTOMS; PHOTON BEAMS; RADIATION DOSE DISTRIBUTIONS; RADIATION DOSES; SIMULATION; THERMOLUMINESCENT DOSEMETERS

Citation Formats

Rivard, Mark J. Brachytherapy dosimetry parameters calculated for a {sup 131}Cs source. United States: N. p., 2007. Web. doi:10.1118/1.2432162.
Rivard, Mark J. Brachytherapy dosimetry parameters calculated for a {sup 131}Cs source. United States. doi:10.1118/1.2432162.
Rivard, Mark J. Thu . "Brachytherapy dosimetry parameters calculated for a {sup 131}Cs source". United States. doi:10.1118/1.2432162.
@article{osti_20951064,
title = {Brachytherapy dosimetry parameters calculated for a {sup 131}Cs source},
author = {Rivard, Mark J.},
abstractNote = {A comprehensive analysis of the IsoRay Medical model CS-1 Rev2 {sup 131}Cs brachytherapy source was performed. Dose distributions were simulated using Monte Carlo methods (MCNP5) in liquid water, Solid{sup TM}, and Virtual Water{sup TM} spherical phantoms. From these results, the in-water brachytherapy dosimetry parameters have been determined, and were compared with those of Murphy et al. [Med. Phys. 31, 1529-1538 (2004)] using measurements and simulations. Our results suggest that calculations obtained using erroneous cross-section libraries should be discarded as recommended by the 2004 AAPM TG-43U1 report. Our {sub MC}{lambda} value of 1.046{+-}0.019 cGy h{sup -1} U{sup -1} is within 1.3% of that measured by Chen et al. [Med. Phys. 32, 3279-3285 (2005)] using TLDs and the calculated results of Wittman and Fisher [Med. Phys. 34, 49-54 (2007)] using MCNP5. Using the discretized energy approach of Rivard [Appl. Radiat. Isot. 55, 775-782 (2001)] to ascertain the impact of individual {sup 131}Cs photons on radial dose function and anisotropy functions, there was virtual equivalence of results for 29.461{<=}E{sub {gamma}}{<=}34.419 keV and for a mono-energetic 30.384 keV photon source. Comparisons of radial dose function and 2D anisotropy function data are also included, and an analysis of material composition and cross-section libraries was performed.},
doi = {10.1118/1.2432162},
journal = {Medical Physics},
number = 2,
volume = 34,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}