Time-harmonic magnetic resonance elastography of the normal feline brain.

Journal of Biomechanics
A J PattisonKeith D Paulsen

Abstract

Imaging of the mechanical properties of in vivo brain tissue could eventually lead to non-invasive diagnosis of hydrocephalus, Alzheimer's disease and other pathologies known to alter the intracranial environment. The purpose of this work is to (1) use time-harmonic magnetic resonance elastography (MRE) to estimate the mechanical property distribution of cerebral tissue in the normal feline brain and (2) compare the recovered properties of grey and white matter. Various in vivo and ex vivo brain tissue property measurement strategies have led to the highly variable results that have been reported in the literature. MR elastography is an imaging technique that can estimate mechanical properties of tissue non-invasively and in vivo. Data was acquired in 14 felines and elastic parameters were estimated using a globo-regional nonlinear image reconstruction algorithm. Results fell within the range of values reported in the literature and showed a mean shear modulus across the subject group of 7-8 kPa with all but one animal falling within 5-15 kPa. White matter was statistically stiffer (p<0.01) than grey matter by about 1 kPa on a per subject basis. To the best of our knowledge, the results reported represent the most extensive set...Continue Reading

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Citations

May 18, 2013·Journal of the Mechanical Behavior of Biomedical Materials·Yuan FengPhilip V Bayly
Mar 24, 2011·Physics in Medicine and Biology·E H ClaytonP V Bayly
Oct 20, 2012·Physics in Medicine and Biology·John B WeaverKeith D Paulsen
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Jun 8, 2018·Physics in Medicine and Biology·Ligin M SolamenKeith D Paulsen
Mar 31, 2012·Physics in Medicine and Biology·Sebastian PapazoglouIngolf Sack
Aug 6, 2013·Physics in Medicine and Biology·Temel K YasarThomas J Royston

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