Feasibility study using MRI and two optical CT scanners for readout of polymer gel and PresageTM

7th International Conference on 3D Radiation Dosimetry

Svensson, H.^1 ; Skyt, P.S.^2 ; Ceberg, S.^1,3 ; Doran, S.^4 ; Muren, L.P.^2 ; Balling, P.^5 ; Petersen, J.B.B.^2 ; Bäck, S.Å.J.^1,3

Department of Radiation Physics, Skåne University Hospital, Malmö, Sweden^1

Dept. of Medical Physics, Aarhus University, Aarhus University Hospital, Denmark^2

Department of Medical Radiation Physics, Lund University, Malmö, Sweden^3

Department of Physics, University of Surrey, Guildford, Surrey, United Kingdom^4

Department of Physics and Astronomy, Aarhus University, Denmark^5

关键词: Feasibility studies;    Laser scanner;    Optical CT;    Polymer gels;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012079/pdf
DOI  :  10.1088/1742-6596/444/1/012079

来源: IOP

【 摘 要 】

The aim of this study was to compare the conventional combination of three-dimensional dosimeter (nPAG gel) and readout method (MRI) with other combinations of three-dimensional dosimeters (nPAG gel/Presage™) and readout methods (optical CT scanners). In the first experiment, the dose readout of a gel irradiated with a four field-box technique was performed with both an Octopus IQ scanner and MRI. It was seen that the MRI readout agreed slightly better to the TPS. In another experiment, a gel and a Presage™ sample were irradiated with a VMAT field and read out using MRI and a fast laser scanner, respectively. A comparison between the TPS and the volumes revealed that the MRI/gel readout had closer resemblance to the TPS than the optical CT/Presage™ readout. There are clearly potential in the evaluated optical CT scanners, but more time has to be invested in the particular scanning scenario than was possible in this study.