Magnetization transfer in polymer gel dosimeters

Abstract

Radiation dose distributions in polymer gel dosimeters can be quantified using various MRI methods. Currently, measurements of R2 are in common use for measuring doses. The dose response mechanism is believed to involve magnetization exchange between the polymer formed by radiation and the solvent in the gel. In this paper we used quantitative measurements of magnetization transfer (MT) to characterize polymer gels before and after irradiation to better understand their dose response, and to explore the potential advantages of imaging based on MT. © 2006 IOP Publishing Ltd.