Comprehensive quality assurance for base of skull IMRT

7th International Conference on 3D Radiation Dosimetry

Thomas, A.^1 ; O'Daniel, J.^1 ; Adamovics, J.^2 ; Ibbott, G.^3 ; Oldham, M.^1

Duke University Medical Center, Durham, NC, United States^1

Rider University, Lawerenceville, NJ, United States^2

University of Texas - MD Anderson, Houston, TX, United States^3

关键词: Color map;    Comprehensive qualities;    Dose distributions;    Head and neck;    High quality;    High-accuracy;    Optical CT;    Treatment plans;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012050/pdf
DOI  :  10.1088/1742-6596/444/1/012050

来源: IOP

【 摘 要 】

Six base of skull IMRT treatment plans were delivered to Presage dosimeters within the RPC Head and Neck Phantom for quality assurance (QA) verification. Isotropic 2mm 3D data were acquired by optical-CT scanning with the DLOS system (Duke Large Optical-CT Scanner) and compared to the Eclipse (Varian) treatment plan. Normalized Dose Distribution (NDD) pass rates were obtained for a number of criteria. High quality 3D dosimetry data was observed from the DLOS system, illustrated here through colormaps, isodose lines, and profiles. Excellent agreement with the planned dose distributions was also observed with NDD analysis revealing > 90% pass rates (with criteria 3%, 2mm), and noise