Abstract #0152
Sodium MRI of Articular Cartilage with Improved SNR Using Coherent SSFP Imaging at 7T
Stefan Zbyn 1 , Oliver Bieri 2 , Vladimir Mlynarik 1 , Vladimir Juras 1 , and Siegfried Trattnig 1
1
High Field MR Centre, Department of
Biomedical Imaging and Image-Guided Therapy, Medical
University Vienna, Vienna, Austria,
2
Division
of Radiological Physics, Department of Radiology,
University of Basel Hospital, Basel, Switzerland
Coherent steady state sequences, such as FISP or
TrueFISP, may provide higher SNR than spoiled gradient
echo (SPGR). However, to our best knowledge, they have
not yet been investigated for in vivo 23Na-MRI. In this
study, in vivo and ex vivo knee measurements at 7T were
performed to assess optimal measurement parameters for
FISP and TrueFISP, and to evaluate their SNR compared to
SPGR. FISP and TrueFISP provided significantly higher
SNR than SPGR in cartilage, muscle and blood. The higher
SNR may be traded off for higher resolution or shorter
measurement times and help to get 23Na-MRI into clinical
practice.
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