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Abstract #0990

Quantitative Imaging for Radiotherapy on an MR-Linac Scanner

Folkert Koetsveld1, Leon C. ter Beek2, Petra J. van Houdt1, Laurens D. van Buuren1, and Uulke A. van der Heide1

1Radiotherapy, Netherlands Cancer Institute, Amsterdam, Netherlands, 2Radiology, Netherlands Cancer Institute, Amsterdam, Netherlands

The MR-Linac integrates and MR-scanner with a radiotherapy treatment machine. Patients undergoing radiotherapy treatment will be imaged daily on the MR-Linac. We investigated the suitability of the MR-Linac as a platform for quantitative imaging. Daily quantitative imaging can be used for imaging biomarker discovery, and give information on tumor treatment response. We did phantom studies of four quantitative MRI techniques: T2 mapping, dynamic contrast enhanced imaging, T1 mapping and diffusion weighted imaging to determine the accuracy of these techniques on the MR-Linac. We tested the repeatability of T2 mapping on a volunteer.

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