Abstract #4270
Modes of Shear Waves in Brain MR Elastography
Cemre Ariyurek 1,2 , Yusuf Ziya Ider 1 , Necip Gurler 1 , Safa Ozdemir 1 , Alp Emek 1 , Arif Sanli Ergun 3 , and Ergin Atalar 1,2
1
Department of Electrical and Electronics
Engineering, Bilkent University, Ankara, Turkey,
2
National
Magnetic Resonance Research Center (UMRAM), Ankara,
Turkey,
3
Department
of Electrical and Electronics Engineering, TOBB-University
of Economics and Technology, Ankara, Turkey
In this study, modes of shear waves that may form during
MR elastography of brain are investigated. Results of
eigenfrequency simulations indicate that there are
eigenmodes that may be excited by actuators at correct
frequencies. In the results of frequency domain
simulations and human experiments peak displacement(s)
are observed at certain frequencies, having similar
shear wave patterns to eigenmodes. A shift in the
frequency of the peak displacement is observed in
simulations when stiffness value of brain is altered.
Thus, this method can be used for diagnosing diseases
altering stiffness by detecting a frequency shift in
peak displacement.
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