Abstract #2430
Estimation of shear modulus in heart phantom using FE-simulated and MRE-measured displacements
Samad Javid 1 , David Lake 1 , Shivaram Poigai 1 , Arvin Arani 1 , Armando Manduca 1 , Kiaran McGee 1 , Richard Ehman 1 , Dan Dragomir-Daescu 1 , and Philip Araoz 1
1
Mayo Clinic, Rochester, MN, United States
Cardiac MRE may be able to measure the regional
myocardial shear stiffness. We used Finite Element (FE)
technique to simulate a noise-free displacement filed in
the myocardial wall of a polymeric heart phantom. MRI
was used to measure the displacement field in the heart
phantom. DI and LFE were then used to estimate the shear
modulus in the phantom using the FE simulated and MR
measured displacement data. Both inversion methods
underestimated the shear modulus in the myocardial wall.
The results showed that in thin walled structures, DI
and LFE give better estimations of shear modulus at
higher frequencies.
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