Abstract #2553
Comparing 1.5T vs. 7T phase contrast MRI for measuring brain tissue pulsation
Nils Noorman 1 , Fredy Visser 1,2 , Peter R. Luijten 1 , and Jaco J.M. Zwanenburg 1
1
Department of Radiology, University Medical
Center Utrecht, Utrecht, Utrecht, Netherlands,
2
Philips
Healthcare, Best, Netherlands
Cardiac-driven volumetric strain pulsations in the brain
are small, but relevant for normal physiology and
disease. These strain rates can be obtained from phase
contrast MRI with low encoding gradients, but the
corresponding long TEs reduce the SNR. This work
determines the optimal TE for phase contrast MRI with
very low encoding velocities (< 1 cm/s) and the
potential gain in SNR at 7T (with shorter T2*) compared
to 1.5T, in 6 subjects. Despite signal attenuation due
to shorter T2* at 7T, we obtained a 5-fold increase in
SNR between 1.5T and 7T.
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