Influence of preparation and calibration method of PAGAT dosimeter on TSE MR readout results

7th International Conference on 3D Radiation Dosimetry

Vávru, K.^1 ; Dvorák, P.^2 ; Tintera, J.^3 ; Spevácek, V.^1

Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehová 7, 115 19 Prague 1, Czech Republic^1

London Clinic, 22 Devonshire Place, London, W1G 6JA, United Kingdom^2

Institute for Clinical and Experimental Medicine, Vídenská 1958/9, 140 21 Prague 4, Czech Republic^3

关键词: Calibration method;    Gel dosimeter;    Glass walls;    Monomer solutions;    Plan verifications;    Preparation procedures;    Scanning time;    Turbo spin echos;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012093/pdf
DOI  :  10.1088/1742-6596/444/1/012093

来源: IOP

【 摘 要 】

In this study PAGAT dosimeter evaluation by TSE sequence was tested. PAGAT dosimeter preparation procedure was modified to increase the dosimeter sensitivity. Because THPC reacts with gelatin, adding THPC to monomer solution prior to dissolved gelatine helps exploit THPC as an antioxidant. Turbo spin echo sequence enables to evaluate gel dosimeter with 3D equidistant resolution in a reasonable scanning time. Glass walls of the phantom cause problems both by computing inaccuracies and MR imaging artefacts. The inner dosimeter volume is not affected by these inaccuracies and should be used for radiotherapy plan verification.