Measurements for dose distribution with a photo-stimulated luminescence dosimeter sheet

7th International Conference on 3D Radiation Dosimetry

Kurokawa, C.^1 ; Urushiyama, A.^2

Graduate School of Medicine, Juntendo University, Tokyo, Japan^1

Department of Chemistry, College of Science, St. Paul's (Rikkyo) University, Tokyo, Japan^2

关键词: Blue LED lights;    Dose distributions;    Effective atomic number;    Photo stimulated luminescence;    Photon beams;    Readout time;    Smooth curves;    Treatment planning systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012035/pdf
DOI  :  10.1088/1742-6596/444/1/012035

来源: IOP

【 摘 要 】

Dose distributions for photon beam were measured using a Photo-Stimulated Luminescence Dosimeter (PSLD) sheet, which has 18 × 24 cm2dimension and 0.2 mm thickness. Its density and effective atomic number are 1.0 g/cm3and 7.6, respectively. The read out was performed by blue LED lights for 20 seconds, which was much shorter than the readout time for TLD. The percent depth dose and dose profile were obtained as smooth curve after the calibration and it reproduced the measurements with ionization chamber, except for the tail region in the dose profile. We demonstrated the measurement of the prostate VMAT dose distribution also. The result reproduces the calculation by treatment planning system (TPS) qualitatively. It is shown that the PSLD sheet has the potential to measure the dose distribution.