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Comparison of I‐125 sources used for permanent interstitial implants
Author(s) -
Heintz Bret H.,
Wallace Robert E.,
Hevezi James M.
Publication year - 2001
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 - 10.1118/1.1359246
Subject(s) - brachytherapy , dosimetry , medical physics , source model , nuclear medicine , radiation oncology , medicine , computer science , radiation therapy , surgery , theoretical computer science
The increase in the number of manufacturers of125 I sources used in prostate brachytherapy has generated many questions in the radiation oncology community. In this investigation, the physical and dosimetric characteristics were evaluated for the following sources listed by marketing company and source model: Nycomed‐Amersham 6711 (OncoSeed), Nycomed‐Amersham 6702, Mentor IoGold, UroMed Symmetra, Imagyn IsoSTAR, UroCor, (PSA, Mallincrkrodt) ProstaSeed, Syncor PharmaSeed, SourceTech Medical, (BARD)125 Implant (BrachySource), Med‐Tec I‐Plant, Best Medical Model 2301, DraxImage BrachySeed, and International Brachytherapy, Inc. (IBT) InterSource 125 . The investigation examined the differences in design, construction, and the dosimetric characteristics created from each source. The dosimetric characteristics of the new sources were compared to that of the Amersham 6711 source. Parameter studies have led to the development of a simple equation that can be used to clinically convert the standard 6711 source strength to an equivalent strength of a new source.