Medicine and Health Sciences Commons^™

A Volumetric Modulated Arc Therapy Retrospective Planning Study Of Left Sided Chest Wall Treatments With And Without Bolus, Telly J. Armstrong

Culminating Experience Projects

Introduction

VMAT planning techniques have been used more to treat difficult‐to‐plan post‐mastectomy cases. The primary advantage of VMAT is the better performance at intermediate-high dose sparing and mean heart dose, without sacrificing target coverage. The location of the chest wall leads to clinical target volumes (CTV) adjoined to the skin which would generate a planning target volume (PTV) located outside the body. To overcome these limitations a virtual bolus is used during optimization. The purpose of the study is to evaluate if a VMAT technique without a bolus, with 5 mm virtual bolus, or 1 cm virtual bolus provides better …

The Air Gap Effect Between A Bolus And The Skin Surface For Chest Wall Irradiation, Marisa Clark

Culminating Experience Projects

Planning technique and bolus choice are important aspects in planning chest wall irradiation (CWI). Many previous studies have tested various combinations of photon energies, electron energies, bolus types and sizes, air gaps sizes, and treatment methods. This study aims to assess the effect of smaller, clinically relevant air gap sizes on specific chest wall treatments using a variety of common bolus types. Due to the Covid-19 pandemic, no data was able to be collected and was instead fabricated by the researcher. Four different treatment plans were created on a phantom patient using various energies of photons (6MV and 10MV) and …