Dynamic 3D measurement of modulated radiotherapy: a scintillator-based approach

9th International Conference on 3D Radiation Dosimetry

Archambault, Louis^1 ; Rilling, Madison^1 ; Roy-Pomerleau, Xavier^1 ; Thibault, Simon^1

Département de Physique, De Génie Physique et d'Optique, Université Laval, QC, Canada^1

关键词: Dose distributions;    Dose measurement;    End-to-end verifications;    Plastic scintillator;    Plenoptic cameras;    Second generation;    Temporal dimensions;    Volumetric modulated arc therapy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012023/pdf
DOI  :  10.1088/1742-6596/847/1/012023

来源: IOP

【 摘 要 】

With the rise of high-conformity dynamic radiotherapy, such as volumetric modulated arc therapy and robotic radiosurgery, the temporal dimension of dose measurement is becoming increasingly important. It must be possible to tell both 'where' and 'when' a discrepancy occurs between the plan and its delivery. A 3D scintillation-based dosimetry system could be ideal for such a thorough, end-to-end verification; however, the challenge lies in retrieving the volumetric information of the light-emitting volume. This paper discusses the motivation, from an optics point of view, of using the images acquired with a plenoptic camera, or light field imager, of an irradiated plastic scintillator volume to reconstruct the delivered 3D dose distribution. Current work focuses on the optimization of the optical design as well as the data processing that is involved in the ongoing development of a clinically viable, second generation dosimetry system.