Purpose: To compare target dose conformality and OAR sparing afforded by VMAT and HT for pancreatic cancer.
Materials and Methods: A retrospective planning study was performed in 18 patients. Total treatment dose was 59.4Gy. OAR and PTV mean doses, conformity indices, isodose volumes, and integral doses were compared. The relationship...
The leading cause of death 20 years after treatment for children surviving a cancer of the central nervous system was from a subsequent malignant neoplasm (SMN) (1). Although it was been shown that proton therapy considerably reduces the risk of a fatal SMN in children receiving craniospinal irradiation compared to...
Soil that is contaminated with radioactive elements poses an exposure hazard to those whom may take up temporary or permanent residence on such a site. Of particular interest is the internal exposure from ingestion of this radioactive soil. Although most ingestion of soil is inadvertent, usually being attached to foodstuffs...
Radiation therapy treatment planning and optimization requires accurate, precise,
and fast computation of absorbed dose to all critical and target volumes in a patient. A
new method for speeding up the computational costs of Monte Carlo dose calculations is
described that employs a hybrid classical-quantum computing architecture.
Representative results are...
Introduction: In today's radiological quest to pacify and eliminate cancer, it has become conventional in cancer treatment facilities to implement advanced guidance or target localization systems with the goal of maximizing accuracy of radiation dose delivery to a tumor while simultaneously minimizing normal tissue complication. At the Oregon Health &...
Bone strength and fracture resistivity are related to a variety of factors encompassed in what is referred to as bone quality. However, bone quality is not a well-defined concept; therefore individual fracture risk cannot be predicted accurately, and osteoporosis treatment monitoring remains di cult. Clinically available imaging modalities use bone...
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...
Radiochromic film dosimetry offers many advantages over standard film that requires wet chemical processing. Radiochromic film offers: a permanent color change upon irradiation; high spatial resolution; a response that is independent of energy, particle type, and angle of incidence; near tissue equivalence; and a wide dosimetric range. However, there are...
With the growing incidence of total hip replacements performed each year in the United States, the incidence of patients with prosthesis requiring radiotherapy is bound to increase. It is necessary to understand and quantify the effects of the high atomic number material prostheses used in total hip replacements on therapeutic...
Use of optically stimulated luminescence detectors (OSLDs) is rapidly increasing in the area of in vivo dosimetry. OSLDs are relatively new to the market compared to their main competitor, thermoluminescent detectors (TLDs). Currently, not all characteristics of OSLDs have been fully investigated. Landauer’s nanoDot OSLDs were used in conjunction with...