Cherenkov radiation dosimetry in water tanks _ video rate imaging, tomography and IMRT & VMAT plan verification

8th International Conference on 3D Radiation Dosimetry

Pogue, Brian W.^1,2 ; Glaser, Adam K.^1 ; Zhang, Rongxiao^2 ; Gladstone, David J.^1,3

Thayer School of Engineering, Dartmouth College, Hanover

NH, United States^1

Department of Physics and Astronomy, Dartmouth College, Hanovera

NH, United States^2

Radiation Oncology, Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon

NH, United States^3

关键词: 2-d imaging;    3-d tomographies;    Cherenkov radiations;    Filtered back-projection;    Medical physics;    Plan verifications;    Radiation beams;    Treatment planning systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/573/1/012013/pdf
DOI  :  10.1088/1742-6596/573/1/012013

来源: IOP

【 摘 要 】

This paper presents a survey of three types of imaging of radiation beams in water tanks for comparison to dose maps. The first was simple depth and lateral profile verification, showing excellent agreement between Cherenkov and planned dose, as predicted by the treatment planning system for a square 5cm beam. The second approach was 3D tomography of such beams, using a rotating water tank with camera attached, and using filtered backprojection for the recovery of the 3D volume. The final presentation was real time 2D imaging of IMRT or VMAT treatments in a water tank. In all cases the match to the treatment planning system was within what would be considered acceptable for clinical medical physics acceptance.