Health Physics and Diagnostic Sciences
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Skin cancer is the most common type of malignancy affecting both men and women in the United States. A majority of these cases are nonmelanoma skin cancers (NMSC) such as basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). The goal of any skin cancer treatment is to cure the lesion itself while also preserving function and optimizing superficial cosmesis. High dose rate (HDR) brachytherapy provides an alternative to superficial x-ray or electron beam for skin cancer treatment. Utilizing an Iridium 192 source soldered to the end of a wire, surface dose can be administered at predetermined positions with sharper dose fall off than x-ray or electron beams. A variety of applicators are available to guide the HDR source wire to the specified location. The Harrison Anderson Mick (H.A.M.) applicator is an HDR surface applicator designed to create defined spacing between the source, tissue, and source channels. The pliable nature of the flap allows for customizable contouring to the patient’s treatment area. This project is designed around the general implementation and commissioning of a H.A.M applicator flap for HDR skin cancer brachytherapy and the acceptance and commissioning of a Varian Bravos HDR afterloader. Dimensional analysis of the applicators matched manufacturer specifications and each applicator was free from damage. Applicator dosimetry was verified using Gafchromic EBT3 film and RIT113 film analysis software. Prescription depth and dose recommendations are presented and both treatment planning and quality assurance methods were established. End-to-end testing performed using the applicators demonstrated that they are adequate and capable of HDR treatment.
Afterloader; Brachytherapy; Bravos; Skin; Surface Applicator
Medical Sciences | Medicine and Health Sciences | Nuclear | Oncology
University of Nevada, Las Vegas
Thatcher, Timothy Richard, "HDR Brachytherapy for Skin Cancer Using H.A.M. Applicator" (2020). UNLV Theses, Dissertations, Professional Papers, and Capstones. 3964.
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