COMPRESSED SENSING BASED ECHO PLANAR 3D MRSI USING SHORT ECHO TIME: A PILOT EVALUATION USING A PROSTATE PHANTOM
Rajakumar Nagarajan 1 , Neil Wilson 1 , and M.Albert Thomas 1
Radiological Sciences, University of
California Los Angeles, LOS ANGELES, CA, United States
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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