The potential of polymer gel dosimeters for 3D MR-IGRT quality assurance

9th International Conference on 3D Radiation Dosimetry

Roed, Y.^1,2 ; Ding, Y.^3 ; Wen, Z.^2 ; Wang, J.^2 ; Pinsky, L.^1 ; Ibbott, G.^2

Department of Physics, University of Houston, Science and Research Building 1, 3507 Cullen Blvd., Houston

TX

77204, United States^1

Department of Radiation Physics, University of Texas, MD Anderson Cancer Center, 1400 Pressler St., Houston

TX

77030, United States^2

Department of Imaging Physics, University of Texas, MD Anderson Cancer Center, 1400 Pressler St., Houston

TX

77030, United States^3

关键词: Advanced treatment;    Dose distributions;    Magnetic resonance scanners;    Polymer gel dosimeter;    Radiation delivery;    Radiation treatments;    Strong magnetic fields;    Tumor volumes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012059/pdf
DOI  :  10.1088/1742-6596/847/1/012059

来源: IOP

【 摘 要 】

Advances in radiotherapy technology have enabled more accurate delivery of radiation doses to anatomically complex tumor volumes, while sparing surrounding tissues. The most recent advanced treatment modality combines a radiation delivery system (either Cobalt-60 therapy heads or linear accelerator) with a diagnostic magnetic resonance (MR) scanner to perform MR-image guided radiotherapy (MR-IGRT). For a radiation treatment plan to be delivered successfully with MR-IGRT the compliance with previously established criteria to validate the passing of such plans has to be confirmed. Due to the added strong magnetic field a new set of quality assurance standards has to be developed. Ideal detectors are MR-compatible, can capture complex dose distributions and can be read out with MRI. Polymer gels were investigated as potential three dimensional MR-IGRT quality assurance detectors.