A Model-Based Reconstruction Technique for Parameter Mapping of Saturation Prepared Radially Acquired Data

Johannes Tran-Gia¹, Daniel Stb¹, Dietbert Hahn¹, Herbert Kstler¹

A model-based image reconstruction algorithm for parameter mapping of the apparent relaxation parameter T1_eff after saturation preparation is presented. For radial trajectories, every acquired projection contains information about the image contrast. By incorporating a signal model into the image reconstruction, it is possible to use this information to resolve the signal evolution with a high temporal resolution, yielding the relaxation parameters T1_eff. The functionality of the algorithm and the accuracy of the quantified parameters are demonstrated in phantom studies as well as in in-vivo measurements.