Preliminary evaluation of the dosimetric accuracy of the in vivo plastic scintillation detector OARtrac system for prostate cancer treatments. Phys Med Biol 2014 May 07;59(9):N27-36
Date
04/16/2014Pubmed ID
24732073Pubmed Central ID
PMC4083835DOI
10.1088/0031-9155/59/9/N27Scopus ID
2-s2.0-84898679703 (requires institutional sign-in at Scopus site) 13 CitationsAbstract
A promising, new, in vivo prostate dosimetry system has been developed for clinical radiation therapy. This work outlines the preliminary end-to-end testing of the accuracy and precision of the new OARtrac scintillation dosimetry system. We tested 94 calibrated plastic scintillation detector (PSD) probes before their final integration into endorectal balloon assemblies. These probes had been calibrated at The University of Texas MD Anderson Cancer Center Dosimetry Laboratory. We used a complete clinical OARtrac system including the PSD probes, charge coupled device camera monitoring system, and the manufacturer's integrated software package. The PSD probes were irradiated at 6 MV in a Solid Water® phantom. Irradiations were performed with a 6 MV linear accelerator using anterior-posterior/posterior-anterior matched fields to a maximum dose of 200 cGy in a 100 cm source-axis distance geometry. As a whole, the OARtrac system has good accuracy with a mean error of 0.01% and an error spread of ±5.4% at the 95% confidence interval. These results reflect the PSD probes' accuracy before their final insertion into endorectal balloons. Future work will test the dosimetric effects of mounting the PSD probes within the endorectal balloon assemblies.
Author List
Klawikowski SJ, Zeringue C, Wootton LS, Ibbott GS, Beddar SAuthor
Slade J. Klawikowski PhD Assistant Professor in the Radiation Oncology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
HumansMale
Phantoms, Imaging
Plastics
Prostatic Neoplasms
Radiometry
Scintillation Counting
