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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