A collimated detection system for assessing leakage dose from medical linear accelerators at the patient plane
P Lonski, ML Taylor, RD Franich, T Kron
Physical and Engineering Sciences in Medicine | SPRINGER | Published : 2014
Leakage radiation from linear accelerators can make a significant contribution to healthy tissue dose in patients undergoing radiotherapy. In this work thermoluminescent dosimeters (LiF:Mg,Cu,P TLD chips) were used in a focused lead cone loaded with TLD chips for the purpose of evaluating leakage dose at the patient plane. By placing the TLDs at one end of a stereotactic cone, a focused measurement device is created; this was tested both in and out of the primary beam of a Varian 21-iX linac using 6 MV photons. Acrylic build up material of 1.2 cm thickness was used inside the cone and measurements made with either one or three TLD chips at a given distance from the target. Comparing the read..View full abstract
Awarded by National Health and Medical Research Council (NHMRC, Australia)
This work is supported by National Health and Medical Research Council (NHMRC, Australia) Project Grant 555240. We would also like to thank Ryan Smith (WBRC Alfred Hospital and RMIT University) for his assistance.