Results 51 to 60 of about 4,576 (213)

Spatially Aware Acquisition‐Independent Deep Learning for IVIM MRI Parameter Estimation in Patients With Esophageal Cancer

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Neural controlled differential equations (NCDEs) recently emerged as a robust deep learning approach for quantitative MRI parameter estimation. NCDEs offer flexibility to changes in acquisition protocols by modeling the signal evolution dynamics. However, NCDE implementations operate on a voxel‐by‐voxel basis and cannot exploit spatial
Daan Kuppens, Roman S. Oort, Sebastiano Barbieri, Stella Mook, Gert J. Meijer, Oliver J. Gurney‐Champion   +5 more
wiley   +1 more source

Suggested optimized b value sets for brain IVIM.

, 2021
Suggested optimized b value sets for brain IVIM.
Christian Federau (452382), Harri Merisaari (6791462)   +1 more
core   +1 more source

Liver fibrosis: An intravoxel incoherent motion (IVIM) study [PDF]

Journal of Magnetic Resonance Imaging, 2012
AbstractPurpose:To characterize longitudinal changes in molecular water diffusion, blood microcirculation, and their contributions to the apparent diffusion changes using intravoxel incoherent motion (IVIM) analysis in an experimental mouse model of liver fibrosis.Materials and Methods:Liver fibrosis was induced in male adult C57BL/6N mice (22–25 g; n =
Wu, EX, Yang, J, Lee, FY, Qiao, Z, Fan, SJ, Gao, DS, Chow, AM, Man, K   +7 more
openaire   +3 more sources

Associations between microstructural tissue changes, white matter hyperintensity severity, and cognitive impairment: an intravoxel incoherent motion imaging study

Frontiers in Aging Neuroscience, 2023
IntroductionWhite matter hyperintensities (WMHs) are a common age- and vascular risk factor-related disease and have been recognized to play an important role in cognitive impairment. However, it is still unclear what the mechanism of this effect is.
Huihua Lin, Huihua Lin, Xiaomin Dai, Xiaomin Dai, Jiawei Su, Jiawei Su, Shengsheng Yang, Shengsheng Yang, Yonghong Zheng, Yonghong Zheng, Mingping Ma, Mingping Ma, Shun Yu, Shun Yu   +13 more
doaj   +1 more source

Simplified Anisotropic IVIM Using Spherical Means and an Application in the Placenta

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To reduce the complexity associated with anisotropic IVIM modeling, we derived two simplified diffusion MRI models that map the apparent diffusivity, relative proportions, and anisotropy of perfusion‐ and diffusion‐related signal components and demonstrated them in placenta scans.
Paddy J. Slator, Luke Pleva, Alexandra Crawford, Lucy Higgins, Edward Johnstone, Alexander E. P. Heazell, Daniel C. Alexander, Josephine H. Naish, Kate Duhig   +8 more
wiley   +1 more source

Can the IVIM model be used for renal perfusion imaging?

, 1998
OBJECTIVE Renal perfusion imaging may provide information about the hemodynamic significance of a renal artery stenosis and could improve noninvasive characterization when combined with angiography.
Müller MF, Edelman RR, Prasad PV
core   +1 more source

Signal to noise and b-value analysis for optimal intra-voxel incoherent motion imaging in the brain.

PLoS ONE, 2021
Intravoxel incoherent motion (IVIM) is a method that can provide quantitative information about perfusion in the human body, in vivo, and without contrast agent.
Harri Merisaari, Christian Federau
doaj   +1 more source

Evidence of Tri-Exponential Decay for Liver Intravoxel Incoherent Motion MRI: A Review of Published Results and Limitations

Diagnostics, 2021
Diffusion weighted imaging (DWI) and intravoxel incoherent motion (IVIM) have been explored to assess liver tumors and diffused liver diseases. IVIM reflects the microscopic translational motions that occur in voxels in magnetic resonance (MR) DWI.
Olivier Chevallier, Yì Xiáng J. Wáng, Kévin Guillen, Julie Pellegrinelli, Jean-Pierre Cercueil, Romaric Loffroy   +5 more
doaj   +1 more source

Optimized Combination of b‑values for IVIM Perfusion Imaging in Acute Ischemic Stroke Patients.

, 2020
PURPOSE To determine the optimal combination of low b‑values to generate perfusion information from intravoxel incoherent motion (IVIM) in patients with acute ischemic stroke (AIS) considering the time constraints for these patients.
Martin BW, Federau C, Wintermark M, Zhu G, Heit JJ, Marcellus DG   +5 more
core   +1 more source

Simultaneous non-contrast assessment of cardiac microstructure and perfusion in vivo in the human heart

Journal of Cardiovascular Magnetic Resonance
: Background: Intravoxel incoherent motion (IVIM) imaging can provide information on cardiac microstructure and microvascular perfusion from a single examination.
Camila Munoz, Eunji Lim, Pedro F. Ferreira, Dudley J. Pennell, Sonia Nielles-Vallespin, Andrew D. Scott   +5 more
doaj   +1 more source