Medical Physics · 1989 · 32 citations · 0 references
MedicineBiomedical EngineeringRadiologyDose-response ModelingRadiation DosimetryTreatment PlanningDose Uncertainty AnalysisEquivalent DoseIn Vivo DosimetryMonte Carlo DosimetryPhantom DosimetryTreatment Planning Dose CalculationDose Distribution CalculationsImaging-based DosimetryMonte Carlo Dose ModelingMonte Carlo Dose SimulationMonte Carlo Phantom DosimetryPhantom-based Dose MeasurementSpatial Dose Distribution AnalysisSuperposition Algorithms
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.