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The accuracy of single‐seed dose superposition for I‐125 implants
Author(s) -
Burns G. S.,
Raeside D. E.
Publication year - 1989
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 - 10.1118/1.596320
Subject(s) - superposition principle , monte carlo method , imaging phantom , mathematics , dosimetry , physics , nuclear medicine , optics , statistics , mathematical analysis , medicine
The Monte Carlo method was used to study perturbations of single I‐125 seed dose distributions created by the presence of one or three neighboring seeds for the case of seeds immersed in a water phantom. Perturbation factors were determined within the geometric shadow of neighboring seeds for two‐seed designs, four‐seed spacings, and several choices of dose point. The results were compared to dose estimates obtained by the simple superposition of single‐seed data for one‐ and two‐plane implants. Some significant differences were found.