Medich, David Christopher
The feasibility of using Ytterbium 169 as a high dose rate brachytherapy source with local catheter shielding was investigated using Monte Carlo simulation software MCNP5. The spectra of Yb-169 and Iridium 192 point sources were simulated through gold, platinum, and stainless steel 304 shields of varying thicknesses from .5-10 mm in a narrow beam geometry. The Yb-169 spectrum was also simulated through a phantom of gold nanoparticle infused tissue to determine the feasibility of using infused tissue as a shield out of catheter. The Yb-169 spectrum was effectively shielded by gold and platinum at .5 mm compared to Ir-192, while the gold nanoparticle infused tissue was ineffective as a shield.
Worcester Polytechnic Institute
Major Qualifying Project
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