Keywords: Quantitative Imaging, Magnetization transfer
Quantitative magnetization transfer (qMT) imaging could be used to assess tumor response on an MR-Linac. However, qMT protocols which use an off-resonance saturation pulse are slow and does not have the 3D coverage necessary to assess tumor response. We implemented a fast 3D balanced steady-state free precession qMT protocol on the MR-Linac. Six glioblastoma patients were scanned on the MR-Linac at weekly intervals during treatment. qMT parameter maps derived using non-linear least square fitting show similar contrast to other qMT protocols. Within-subject coefficient of variation was higher than values found in literature for off-resonance qMT protocols.
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