Event Title
Using Modified Optically Stimulated Luminescent Dosimeters to Accurately Measure Dose in Small Field Radiotherapy
Presentation Type
Poster/Portfolio
Presenter Major(s)
Physics, Chemistry
Mentor Information
Douglas Furton, furtond@gvsu.edu; Paul Jursinic, pjursinic@wmcc.org; James Reuter, jreuter@wmcc.org
Department
Physics, College of Health Professions
Location
Kirkhof Center KC37
Start Date
13-4-2011 11:00 AM
End Date
13-4-2011 12:00 PM
Keywords
Health, Illness, and Healing, Physical Science, Technology
Abstract
It is important to accurately measure dose in small field radiotherapy, which is done using dosimeters. Twelve dosimeters optically stimulated luminescent dosimeters (OSLDs) were modified to be used as small-field dosimeters. Each one of the dosimeters was placed in one of twelve stereotactic radiosurgery fields, ranging in size from 5mm to 30mm, then irradiated with a 6MV photon beam on a Varian Trilogy linear accelerator at West Michigan Cancer Center. The irradiation process was repeated five times and the relative dose was calculated after each. The relative dose was calculated and compared to more standard dose measurement techniques: an unmodified OSLD, a micro-ionization chamber (MIC), and a silicon diode. The results show that the modified OSLDs, for small field irradiations, measured a more accurate value of relative dose when compared to the MIC and unmodified OSLDs but less accurate than the diode. OSLDs are shown to be viable small-field dosimeters.
Using Modified Optically Stimulated Luminescent Dosimeters to Accurately Measure Dose in Small Field Radiotherapy
Kirkhof Center KC37
It is important to accurately measure dose in small field radiotherapy, which is done using dosimeters. Twelve dosimeters optically stimulated luminescent dosimeters (OSLDs) were modified to be used as small-field dosimeters. Each one of the dosimeters was placed in one of twelve stereotactic radiosurgery fields, ranging in size from 5mm to 30mm, then irradiated with a 6MV photon beam on a Varian Trilogy linear accelerator at West Michigan Cancer Center. The irradiation process was repeated five times and the relative dose was calculated after each. The relative dose was calculated and compared to more standard dose measurement techniques: an unmodified OSLD, a micro-ionization chamber (MIC), and a silicon diode. The results show that the modified OSLDs, for small field irradiations, measured a more accurate value of relative dose when compared to the MIC and unmodified OSLDs but less accurate than the diode. OSLDs are shown to be viable small-field dosimeters.