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Abstract #0927

Dead Time Reduction with a Variable Rate Broadband Receiver Applications to Zero Echo Time Imaging

Josip Marjanovic 1 , Jonas Reber 1 , David Otto Brunner 1 , Markus Weiger 1 , Benjamin Emanuel Dietrich 1 , Thomas Schmid 1 , Urs Moser 1 , Christoph Barmet 1,2 , and Klaas Paul Pruessmann 1

1 Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, 2 Skope Magnetic Resonance Technologies, Zurich, Switzerland

The receiver dead time due to high power RF transmission and switching limits the bandwidth and SNR of gapped acquisitions in SWept Imaging by Fourier Transform (SWIFT) approaches or Zero Echo Time imaging (ZTE). The settling times of digital filters required for overall data volume reduction contribute majorly to this dead time and relate to the specificity of the filtering. Therefore we propose a variable rate scheme oversampling the acquisition increasingly towards the gaps of the acquisitions. By this the settling times can be reduced almost arbitrarily with overall very minor data memory requirements.

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