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Experimental determination of the dosimetric characteristics for the I‐Plant™ model 3600 I 125 brachytherapy source
Author(s) -
Tries Mark A.,
Mancevice Corinne G.,
Munro John J.
Publication year - 2005
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 - 10.1118/1.1925179
Subject(s) - brachytherapy , imaging phantom , dosimeter , dosimetry , task group , nuclear medicine , thermoluminescent dosimetry , nuclear engineering , materials science , radiochemistry , environmental science , medical physics , thermoluminescent dosimeter , physics , medicine , radiation therapy , chemistry , radiology , engineering , engineering management
The dosimetric characteristics for a new brachytherapy seed source (I‐Plant™ model 3600) were measured using LiF thermoluminescent dosimeters and appropriate phantom materials in conformance with the methodology and guidance provided by the AAPM Task Group 43. The I‐Plant™ model 3600 is the successor to the I‐Plant™ model 3500. The major difference between these sources is that the model 3600 contains a leaded‐glass core to provide radio‐opacity (while the model 3500 contains a silver core), which does not produce spectral contamination upon neutron activation. The dose rate constant Λ for the model 3600 was determined to be 1.00 Gyh − 1U − 1(with a 6% overall relative standard deviation), compared to 1.01 cGyh − 1U − 1reported for the model 3500 in previous studies. The remaining dosimetric characteristics also are similar for both sources.