Abstract #1707

Sampling Mask Optimization for Compressed Sensing PETRA MRI

Serhat Ilbey¹, Ali Özen¹, Pia Jungmann^2,3, 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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