Three-dimensional radiation dosimetry based on optically-stimulated luminescence

9th International Conference on 3D Radiation Dosimetry

Sadel, M.^1 ; Høye, E.M.^2 ; Skyt, P.S.^2 ; Muren, L.P.^2 ; Petersen, J.B.B.^2 ; Balling, P.^1

Dept of Physics and Astronomy, Aarhus University, Denmark^1

Dept of Medical Physic, Aarhus University, Aarhus University Hospital, Denmark^2

关键词: Active particles;    Detected photons;    Dose distributions;    Dosimetric properties;    Inversion algorithm;    Optically stimulated luminescence;    Three dimensional radiation;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012044/pdf
DOI  :  10.1088/1742-6596/847/1/012044

来源: IOP

【 摘 要 】

A new approach to three-dimensional (3D) dosimetry based on optically-stimulated luminescence (OSL) is presented. By embedding OSL-active particles into a transparent silicone matrix (PDMS), the well-established dosimetric properties of an OSL material are exploited in a 3D-OSL dosimeter. By investigating prototype dosimeters in standard cuvettes in combination with small test samples for OSL readers, it is shown that a sufficient transparency of the 3D-OSL material can be combined with an OSL response giving an estimated >10.000 detected photons in 1 second per 1mm3voxel of the dosimeter at a dose of 1 Gy. The dose distribution in the 3D-OSL dosimeters can be directly read out optically without the need for subsequent reconstruction by computational inversion algorithms. The dosimeters carry the advantages known from personal-dosimetry use of OSL: the dose distribution following irradiation can be stored with minimal fading for extended periods of time, and dosimeters are reusable as they can be reset, e.g. by an intense (bleaching) light field.