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Abstract #2815

Ultra-Short Echo Time Imaging using Pointwise Encoding Time Reduction with Radial Acquisition (PETRA)

David Manuel Grodzki1,2, Peter M. Jakob1, Bjoern Heismann2

1Department of Physics EP5, University of Wuerzburg, Wuerzburg, Bavaria, Germany; 2Magnetic Resonance, Siemens AG, Erlangen, Bavaria, Germany

Sequences with ultra short echo time (TE) enable new applications of MRI, including bone, tendon, ligament and dent imaging. In this work a sequence is presented that achieves the shortest possible TE given by TX/RX switching time and gradient performance of the MR Scanner. In PETRA (Pointwise Encoding Time reduction with Radial Acquisition) outer k-space is filled with radial half-projections whereas the centre is measured single pointwise on a Cartesian trajectory. This hybrid sequence combines the features of single point imaging with radial projection imaging. No hardware changes are required.