Accuracy and reproducibility in x-ray computed tomography polymer gel dosimetry

[摘要] This work assesses the overall reproducibility and accuracy of an x-ray computed tomography (CT) polymer gel dosimetry (PGD) system using a N-isopropyl-acrylamide (NIPAM) based polymer gel and investigated what effects the use of generic, inter-batch, and intra-batch gel calibration have on dosimetric and spatial accuracy. Overall excellent spatial and dosimetric accuracy was found with this system for generic, inter-batch calibration methods.

[发布机构] Department of Physics and Astronomy, University of Victoria, Victoria; BC; V8W 2Y2, Canada^1;Department of Physics, University of British Columbia, Okanagan Campus, Kelowna; BC; V1V 1V7, Canada^2;Medical Physics, BC Cancer Agency, Centre for the Southern Interior, Kelowna; BC; V1Y 5L3, Canada^3;Carleton Laboratory for Radiotherapy Physics, Physics Department, Carleton University, Ottawa; ON; K1S 5B6, Canada^4;Department of Physics, I.K. Barber School of Arts and Sciences, University of British Columbia, Kelowna; BC; V1V 1V7, Canada^5

[关键词] Calibration method;N-isopropylacrylamides;Polymer gel dosimetry;Polymer gels;Reproducibilities;Spatial accuracy;X-ray computed tomography