The uptake, retention, and distribution of ⁶⁰Co, ⁶⁵Zn, ⁸⁵ Sr, and ¹³¹I was examined in the Rough-Skinned Newt (Taricha granulosa). Each of these radionuclides is a possible contaminant of the freshwater environment and, thus, is of importance in radioecology. The newts were maintained singly at 10° C in an unfed...
The purpose of this study is to examine the challenges of accepting and commissioning a new treatment planning system for eye plaque brachytherapy. Currently Oregon Health and Science University (OHSU) utilizes v5.3.9 of the Plaque Simulator software to plan all of its eye plaque brachytherapy cases. However, v5.3.9 is no...
This study investigated the use of radon-222 as an in situ partitioning tracer for quantifying nonaqueous phase liquid (NAPL) saturations in the subsurface. Laboratory physical aquifer models (PAMs), field experiments, and numerical simulations were used to investigate radon partitioning in static (no-flow) experiments and in single-well, 'push-pull' tests conducted in...
The focus of this thesis is to determine the biological impact of dose from
brachytherapy sources commonly used in cancer treatment. To achieve this goal, the
Monte Carlo code PENELOPE was used to simulate point sources of four different
isotopes (¹⁰³Pd, ¹²⁵I, ¹³⁷Cs, and ⁹⁰Sr) in an infinite medium of...
With the advent of more powerful, less expensive computing
resources, more and more attention is being given to Monte Carlo
techniques in design application. In many circles, stochastic
solutions are considered the next best thing to experimental data.
Statistical uncertainties in Monte Carlo calculations are typically
determined by the first...
The International Commission on Radiological Protection (ICRP) has modeled twelve reference animals and plants (RAPs) with simple geometric shapes to be used when estimating radiation dose to non-human biota (NHB). In recent years, there has been interest in creating more realistic models in order to better understand the radiation interactions...