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Abstract #3402

Is a Velocity Encoding of 5 Cm/sec Sufficient to Quantify Brain Motion?

Guillaume Calmon1,2, Marc Labrousse, 1,3, Gabriela Hossu4, Jacques Felblinger1,4, Marc Braun1,5

1IADI, Nancy, France; 2GE Healthcare, Buc, France; 3CHU Reims, France; 4INSERM CIT801, CIC-IT, Nancy, France; 5Nancy Universit, Nancy, France

Brain motion during cardiac cycle, linked to the one of cerebro-spinal fluid (CSF), presents interesting challenges and can have an interest to analyze brain elastography. In this study, we measured brain speed and motion in volunteers at the level of thalamus and brain stem. A velocity encoding of 5 cm/sec was sufficient to obtain brain values consistent with literature. Absolute brain tissue speeds were measured between 0.0002 and 0.17 cm/sec in thalami ROIs and between 0.0014 and 0.48 cm/sec in brain stem ROIs. There was a decreased of motion with cardiac frequency and with age in certain territories.