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Abstract #3286

Accelerated 3D Radial Short Echo-Time MRI of the Knee Using Compressed Sensing

Sairam Geethanath1, Steen Moeller2, Vikram D. Kodibagkar, 13

1Joint program in biomedical engineering, UT Arlington/UT Southwestern Medical Center, Dallas, TX, United States; 2University of Minnesota, Minneapolis, MN, United States; 3School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, United States

Concurrent Dephasing and excitation (CODE) is a novel pulse sequence which facilitates imaging of short T2 components. Currently, exquisite 3D images can be acquired within minutes but imaging dynamics of the knee and T2 exchange contrast agents, would require an even faster imaging scheme. The application of compressed sensing to accelerate CODE MRI has been demonstrated on 5 knee data sets for acceleration factors of 2, 3, 4 and 5. Compressed sensing based reconstruction of the MR volume shows high fidelity with lower noise as quantified by root-mean-square-error with respect to the original full k-space reconstruction.

Keywords

accelerate accelerated acceleration accelerations acceptable acquisition acquisitions adjacent agents allows analyses application approved artifacts asymmetric axial best biological biomedical board chosen code coil column comparative compensation compressed computed computing conjugate consistency contain contrast cover custom demonstration density depicts desired details dimensional dimensions domain done dynamic engineering ensure equation error evaluate even exchange excitation exploit faithfully fast faster feature fine fixed fold full functional future gradient grant graph gridded health hence highly human implementation implementations important in vivo incoherent indicated initial intensity iterations iteratively joint journal knee magnified maintaining matrix measured medial medical meniscus motion noise nominal normalized operator original panel panels park plot pooled potential prior profile projections protocol quantification radial randomly reconstructed reconstruction reconstructions reduced reduction regularization related representative reproduced retaining review school sensing sensitive served sets short significantly slice solve solving southwestern space sparse sparsity speed square structures studies support symmetrical systems transform transformed trio utility variation viable view volume volumes