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Novel techniques and signal models with applications in MRI

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Figure I.4.1. NMRSE obtained for the phantom with the ` 1 -norm and the GI reconstruction at different USFs and SNRs
Figure I.4.2. Reconstruction for a Region Of Interest (ROI) of the phantom with the ` 1 -norm and the GI sparsity measures at USF= 5.5 noise-free.
Figure I.4.3. Results for MRI data of a brain at an USF of 4. The errors in the obtained reconstructions is less for the GI measure of sparsity and the characteristics of the errors agree with the results obtained in the phantom, being less and most notice
Figure I.4.4. Comparison between the ` 1 -norm and the GI sparsity mea- mea-sures at different USFs for the MRI complex data
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