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Abstract #1707

Sampling Mask Optimization for Compressed Sensing PETRA MRI

Serhat Ilbey1, Ali Özen1, Pia Jungmann2,3, Johannes Fischer1, Matthias Jung2, and Michael Bock1
1Dept.of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, 2Department of Diagnostic and Interventional Radiology, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, 3Department of Radiology, Cantonal Hospital Grisons, Chur, Switzerland

Synopsis

Single point imaging (SPI) is intrinsically time-inefficient resulting in very long scan times in PETRA. Compressed sensing PETRA (csPETRA) shortens the acquisition time – here, various csPETRA undersampling schemes were generated and an optimal undersampling scheme was determined experimentally. It was shown in csPETRA knee imaging that in Poisson sampling combined with a spherical fully-sampled center results in minimum error compared to the fully-sampled acquisitions.

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