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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Sack, I.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024On the relationship between viscoelasticity and water diffusion in soft biological tissues.citations
- 2022Mechanical behavior of the hippocampus and corpus callosum: An attempt to reconcile ex vivo with in vivo and micro with macro properties.citations
- 2021Real-Time Multifrequency MR Elastography of the Human Brain Reveals Rapid Changes in Viscoelasticity in Response to the Valsalva Maneuver.citations
- 2020Cardiac-gated steady-state multifrequency magnetic resonance elastography of the brain: Effect of cerebral arterial pulsation on brain viscoelasticity.citations
- 2019Sensitivity of multifrequency magnetic resonance elastography and diffusion-weighted imaging to cellular and stromal integrity of liver tissue.citations
- 2018Combining viscoelasticity, diffusivity and volume of the hippocampus for the diagnosis of Alzheimer's disease based on magnetic resonance imaging.citations
- 2015Tabletop magnetic resonance elastography for the measurement of viscoelastic parameters of small tissue samples.citations
- 2014High-resolution mechanical imaging of the kidney.citations
- 2014Wideband MRE and static mechanical indentation of human liver specimen: sensitivity of viscoelastic constants to the alteration of tissue structure in hepatic fibrosis.citations
- 2014In vivo time-harmonic multifrequency elastography of the human liver.citations
- 2013Compression-sensitive magnetic resonance elastography.citations
- 2013Isovolumetric elasticity alteration in the human heart detected by in vivo time-harmonic elastography.citations
- 2012Fractal network dimension and viscoelastic powerlaw behavior: I. A modeling approach based on a coarse-graining procedure combined with shear oscillatory rheometry.citations
- 2010Viscoelasticity-based MR elastography of skeletal muscle.citations
- 2010Viscoelasticity-based staging of hepatic fibrosis with multifrequency MR elastography.citations
- 2010Viscoelastic properties of liver measured by oscillatory rheometry and multifrequency magnetic resonance elastography.citations
- 2008Non-invasive measurement of brain viscoelasticity using magnetic resonance elastography.citations
- 2008Assessment of liver viscoelasticity using multifrequency MR elastography.citations
- 2007Three-dimensional analysis of shear wave propagation observed by in vivo magnetic resonance elastography of the brain.citations
- 2007Noninvasive assessment of the rheological behavior of human organs using multifrequency MR elastography: a study of brain and liver viscoelasticity.citations
- 2006Shear wave group velocity inversion in MR elastography of human skeletal muscle.citations
- 2003Electromagnetic actuator for generating variably oriented shear waves in MR elastography.citations
- 2002Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations.
Places of action
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article
Compression-sensitive magnetic resonance elastography.
Abstract
Magnetic resonance elastography (MRE) quantifies the shear modulus of biological tissue to detect disease. Complementary to the shear elastic properties of tissue, the compression modulus may be a clinically useful biomarker because it is sensitive to tissue pressure and poromechanical interactions. In this work, we analyze the capability of MRE to measure volumetric strain and the dynamic bulk modulus (P-wave modulus) at a harmonic drive frequency commonly used in shear-wave-based MRE. Gel phantoms with various densities were created by introducing CO2-filled cavities to establish a compressible effective medium. The dependence of the effective medium's bulk modulus on phantom density was investigated via static compression tests, which confirmed theoretical predictions. The P-wave modulus of three compressible phantoms was calculated from volumetric strain measured by 3D wave-field MRE at 50 Hz drive frequency. The results demonstrate the MRE-derived volumetric strain and P-wave modulus to be sensitive to the compression properties of effective media. Since the reconstruction of the P-wave modulus requires third-order derivatives, noise remains critical, and P-wave moduli are systematically underestimated. Focusing on relative changes in the effective bulk modulus of tissue, compression-sensitive MRE may be useful for the noninvasive detection of diseases involving pathological pressure alterations such as hepatic hypertension or hydrocephalus.