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MRCAT imaging is intended to provide the operator with information of tissue properties for radiation attenuation estimation purposes in photon external beam radiotherapy treatment planning. Indication for use: MRCAT Head and Neck is indicated for radiotherapy treatment planning for patients with soft tissue tumors in the Head and Neck region.

MRCAT Head & Neck is a software application to Ingenia, Ingenia Ambition, and Ingenia Elition MR systems. MRCAT Head & Neck is available to the customer as an option to Ingenia MR-RT package, which is a set of accessories for Ingenia systems. Automated generation of MRCAT images takes place at the MR console of Ingenia. The embedded image post-processing runs in the background parallel to image acquisition. MRCAT algorithm enables automatic tissue characterization: Bones are segmented from mDixon in-phase and water images using machine learning based segmentation. Body outline is segmented using in-phase and water images. Tissues are then assigned a continuum of HU values depending on the fat and water intensities of the voxels. The HU assignment provides MRCAT images with CT-like density information.