Experimental determination of the dosimetric characteristics for the I-Plant model 3600 125I brachytherapy source.
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 lambda for the model 3600 was determined to be 1.00 Gy h(-1) U(-1) (with a 6% overall relative standard deviation), compared to 1.01 cGy h(-1) U(-1) reported for the model 3500 in previous studies. The remaining dosimetric characteristics also are similar for both sources.
Tries
Mark A
MA
Department of Physics and Applied Physics, University of Massachusetts Lowell, Radiological Sciences Program, One University Avenue, Lowell, Massachusetts 01854, USA. mark_tries@uml.edu
Mancevice
Corinne G
CG
Munro
John J
JJ
D016880:Anisotropy; D001918:Brachytherapy / Q000295:instrumentation* / Q000379:methods; D002138:Calibration; D005459:Fluorides / Q000737:chemistry; D005898:Glass; D018020:Lithium Compounds / Q000737:chemistry; D015233:Models, Statistical; D019047:Phantoms, Imaging; D011874:Radiometry / Q000379:methods; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted; D012834:Silver; D013819:Thermoluminescent Dosimetry / Q000379:methods
D018020:Lithium Compounds; C027651:lithium fluoride; D012834:Silver; D005459:Fluorides