| People | Locations | Statistics |
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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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Braun, Jürgen
Charité - Universitätsmedizin Berlin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2022Mechanical behavior of the hippocampus and corpus callosum: An attempt to reconcile ex vivo with in vivo and micro with macro properties.citations
- 2020Diagnostic performance of tomoelastography of the liver and spleen for staging hepatic fibrosiscitations
- 2019Sensitivity of multifrequency magnetic resonance elastography and diffusion-weighted imaging to cellular and stromal integrity of liver tissue.citations
- 2019Surface resonance of thin films of the Heusler half-metal Co2MnSi probed by soft x-ray angular resolved photoemission spectroscopy
- 2018Signature of a highly spin polarized resonance state at $mathrm{Co_{2}MnSi(0 0 1)/Ag(0 0 1)}$ interfacescitations
- 2018Combining viscoelasticity, diffusivity and volume of the hippocampus for the diagnosis of Alzheimer's disease based on magnetic resonance imaging.citations
- 2018Signature of a highly spin polarized resonance state at Co2MnSi(001)/Ag(001) interfaces
- 2017Vectorial spin polarization detection in multichannel spin-resolved photoemission spectroscopy using an Ir(001) imaging spin filtercitations
- 2015Cerebral multifrequency MR elastography by remote excitation of intracranial shear wavescitations
- 2015Tabletop magnetic resonance elastography for the measurement of viscoelastic parameters of small tissue samples.citations
- 2014High-resolution mechanical imaging of the kidney.citations
- 2014In vivo multifrequency magnetic resonance elastography of the human intervertebral diskcitations
- 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
- 2012Monitoring the formation of interface-confined mixture by photoelectron spectroscopycitations
- 2010Viscoelasticity-based MR elastography of skeletal muscle.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
- 2008Diffusive diffraction observed with volume-selective STEAM MRS in 100microm water-filled capillaries.
- 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
Isovolumetric elasticity alteration in the human heart detected by in vivo time-harmonic elastography.
Abstract
Time harmonic elastography (THE) has recently been introduced for measurement of the periodic alteration in myocardial shear modulus based on externally induced low-frequency acoustic vibrations produced by a loudspeaker. In this study, we propose further developments of cardiac THE toward a clinical modality including integration of the vibration source into the patient bed and automated parameter extraction from harmonic shear wave amplitudes, wall motion profiles and synchronized electrocardiographic records. This method has enabled us to evaluate the delay between wall motion and wave amplitude alteration for the measurement of isovolumetric times of elasticity alteration during contraction (τ(C)) and relaxation (τ(R)) in a group of 32 healthy volunteers. On average, the wave amplitudes changed between systole and diastole by a factor of 1.7 ± 0.3, with a τ(C) of 137 ± 61 ms and a τ(R) of 68 ± 73 ms, which agrees with results obtained with the more time-consuming and expensive cardiac magnetic resonance elastography. Furthermore, because of the high sampling rate, elasto-morphometric parameters such as transition times and the area of wave amplitude-cardiac motion cycles can be processed in an automated way for the future clinical detection of myocardial relaxation abnormalities.