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Experimental and Monte Carlo determination of the TG‐43 dosimetric parameters for the model 9011 THINSeed™ brachytherapy source
Author(s) -
Kennedy R. M.,
Davis S. D.,
Micka J. A.,
DeWerd L. A.
Publication year - 2010
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.3360899
Subject(s) - monte carlo method , brachytherapy , thermoluminescent dosimeter , dosimetry , dosimeter , materials science , computational physics , source model , nuclear medicine , physics , medicine , mathematics , radiation therapy , statistics
Purpose: AAPM TG‐43 brachytherapy dosimetry parameters for a new, smaller diameterI125brachytherapy source (THINSeed, model 9011) were determined using LiF:Mg,Ti thermoluminescent dosimeter (TLD‐100) microcubes and Monte Carlo simulations. Methods: Two polymethyl methacrylate phantoms were machined to hold TLD‐100 microcubes at specific locations for the experimental determination of the radial dose function, dose‐rate constant, and anisotropy functions of the new source. The TG‐43 parameters were also calculated using Monte Carlo simulations. For comparison, the model 6711 source was also investigated. Results: Experimental results for both models 9011 and 6711 sources showed good agreement with Monte Carlo values, as well as with previously published values. Conclusions: The TG‐43 parameters for the new source model are similar to those of model 6711; however, they represent two separate sources and TG‐43 parameters used in treatment planning must be source specific.