Dosimetric assessment of the PRESAGE dosimeter for a proton pencil beam

7th International Conference on 3D Radiation Dosimetry

Wuu, C.-S.^1 ; Xu, Y.^2 ; Qian, X.^1 ; Adamovics, J.^3 ; Cascio, E.^4 ; Lu, H.-M.^4

Department of Radiation Oncology, Columbia University, New York, NY, United States^1

Department of Radiation Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA, United States^2

Department of Chemistry and Biology, Rider University, Lawrenceville, NJ, United States^3

Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States^4

关键词: Beam profiles;    Depth dose;    Dose distributions;    Dosimetric properties;    Dosimetric response;    Pencil beam;    Phantom materials;    Proton energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012055/pdf
DOI  :  10.1088/1742-6596/444/1/012055

来源: IOP

【 摘 要 】

The objective of this study is to assess the feasibility of using PRESAGE dosimeters for proton pencil beam dosimetry. Two different formulations of phantom materials were tested for their suitability in characterizing a single proton pencil beam. The dosimetric response of PRESAGE was found to be linear up to 4Gy. First-generation optical CT scanner, OCTOPUS™ was used to implement dose distributions for proton pencil beams since it provides most accurate readout. Percentage depth dose curves and beam profiles for two proton energy, 110 MeV, and 93 MeV, were used to evaluate the dosimetric performance of two PRESAGE phantom formulas. The findings from this study show that the dosimetric properties of the phantom materials match with basic physics of proton beams.