COMPRESSED SENSING BASED ECHO PLANAR 3D MRSI USING SHORT ECHO TIME: A PILOT EVALUATION USING A PROSTATE PHANTOM

Conventional three-dimensional MRSI is time-consuming because it involves a large number of phase encodings. Echo-planar spectroscopic imaging (EPSI) approaches have been used to reduce the long acquisition time required for multiple spatial encoding steps, In our study, we have implemented non-uniform undersampling (NUS) with compressed sensing (CS) reconstruction to a three dimensional (3D) EPSI in order to accelerate the data acquisition. We propose that by 2X nonuniform undersampling along phase encodings, the 3D EPSI acquisition time could be significantly reduced without sacrificing the spectral quality with more metabolite detection in the prostate phantom.

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