Abstract #1693
Remotely induced cerebral strain for enhanced safety and acceptance of MR elastography of the brain
Andreas Fehlner 1 , Sebastian Papazoglou 1 , Jing Guo 1 , Kaspar-Josche Streitberger 1 , Sebastian Hirsch 1 , Jrgen Braun 2 , and Ingolf Sack 1
1
Department of Radiology, Charit -
Universittsmedizin Berlin, Berlin, Germany,
2
Institute
of Medical Informatics, Charit - Universittsmedizin
Berlin, Berlin, Germany
A new driver for brain MRE is introduced which avoids
the direct application of vibrations to the head without
compromising sufficiently high extrinsic wave amplitudes
needed for MRE. Waves are introduced into the cranial
cavity by a chest cradle mounted to a piezo-based
actuator which was placed at the end of the patient
table. The new driver is particularly suited for low
drive frequencies (2540 Hz) which are capable to
resolve anatomical details and provide viscoelastic
parameters in agreement to previous work. The new method
is demonstrated in ten healthy volunteers for 8 driving
frequencies and two 3D views.
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