2018-06-28 · Lee Y, Lee SS, Kim N, et al. (2015) Intravoxel incoherent motion diffusion-weighted MR imaging of the liver: effect of triggering methods on regional variability and measurement repeatability of quantitative parameters. Radiology 274:405–415. Article Google Scholar

However, IVIM imaging at low b-values is a persistent problem. This paper aims to investigate in a systematic and detailed manner how the number of low b-values influences the estimation of IVIM parameters. To this end, diffusion-weighted (DW Scherman Rydhög, Anna et al. "Intravoxel Incoherent Motion (IVIM) Imaging at Different Magnetic Field Strengths: What is Feasible?". Magnetic Resonance Imaging.

Intravoxel

Both single-shot TSE-DWI and single-shot EPI-DWI were scanned twice respectively for 15 patients with lung cancer. Göteborg,2018 Intravoxel incoherent motion modeling Optimization of acquisition, analysis and tumor tissue characterization Oscar Jalnefjord DepartmentofRadiationPhysics,InstituteofClinicalSciences, Objective To determine if intravoxel incoherent motion (IVIM) magnetic resonance perfusion can measure the quality of the collateral blood flow in the penumbra in hyperacute stroke. Methods A 6 b values IVIM MRI sequence was acquired in stroke patients with large vessel occlusion imaged <16 hours of last seen well. IVIM perfusion measures were evaluated in regions of interest drawn in the BACKGROUND AND PURPOSE: IVIM MR imaging provides perfusion and diffusion information with a single diffusion-weighted MR image. We determined whether PP and D differ among various types of head and neck tumors. MATERIALS AND METHODS: The study cohort included 123 head and neck tumors: 30 SCCs, 28 benign and 20 malignant SG tumors, 36 lymphomas, and 9 schwannomas. The D and PP values were Diffusion and Intravoxel Incoherent Motion MR Imaging–based Virtual Elastography: A Hypothesis-generating Study in the Liver.

2021-03-01 · Intravoxel incoherent motion (IVIM) imaging is based on diffusion-weighted imaging (DWI) MRI and can provide separate estimates for quantitative metrics of diffusion, representative of structural changes , and the perfusion fraction which is a measure related to microcirculation.

The aim of the study was to compare intravoxel incoherent motion diffusion-weighted imaging (DWI) for evaluating lung cancer using single-shot turbo spin-echo (TSE) and single-shot echo-planar imaging (EPI) in a 3T MR system. Methods .

Abstract Purpose: To systematically analyze intravoxel incoherent motion (IVIM) MRI in a perfusable capillary phantom closely matching the geometry of capillary beds in vivo and to compare the validity of the biexponential pseudo-diffusion and the recently introduced phase-distribution IVIM model.

phase-contrast magnetic resonance imaging, turbulent flow, intravoxel velocity distribution, turbulence intensity, atherosclerosis apparent diffusion coefficient (ADC), perfusion fraction f, pseudodiffusion coefficient D*, and true diffusion coefficient D from intravoxel incoherent motion (IVIM) Pris: 1842 kr. inbunden, 2018. Skickas inom 5-7 vardagar. Köp boken Intravoxel Incoherent Motion (IVIM) MRI (ISBN 9789814800198) hos Adlibris. Fri frakt. Pris: 1619 kr.

Intravoxel incoherent motion diffusion-weighted MR imaging for characterization of focal pancreatic lesions. BACKGROUND AND PURPOSE: Despite a recent resurgence, intravoxel incoherent motion MRI faces practical challenges, including limited SNR and demanding acquisition and postprocessing requirements. A simplified approach using linear fitting of a subset of higher b-values has seen success in other organ systems. We sought to validate this method for evaluation of brain pathology by comparing Purpose . To combine Intravoxel Incoherent Motions (IVIM) imaging and diffusion kurtosis imaging (DKI) which can aid in the quantification of different biological inspirations including cellularity, vascularity, and microstructural heterogeneity to preoperatively grade rectal cancer. Methods.
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Intravoxel incoherent motion (IVIM) allows the separation of perfusion and molecular-based diffusion coefficients [14]. By fitti-b DWI ng multiple data with a biexponential model, three parameters can be obtained from IVIM, including the true diffusion coefficient (D value), perfusion-related pseudodiffusion coefficient (D* value), and perfusion intravoxel dephasing: ( in'tră-voks'ĕl dē-fāz'ing ) Phase difference between flow and stationary nuclei in a voxel. ivim_tools ----- This software package provides the necessary MATLAB scripts, phase distributions and data sets to reproduce the figures in the manuscript "Flow compensated IVIM imaging" by A. Wetscherek, B. Stieltjes and F. B. Laun. 2016-02-10 techniques using diffusion, intravoxel incoherent motion (IVIM) DW-MRI have been employed with increasing frequency in the clinic to evaluate tissue perfusion without the use of contrast agents. IVIM DW-MRI is currently used widely to characterize various diseases.1,3–5 MRI is also an excellent noninvasive modality for evaluating bone marrow A Combined Use of Intravoxel Incoherent Motion MRI Parameters Can Differentiate Early-Stage Hepatitis-b Fibrotic Livers from Healthy Livers Yì Xiáng J. Wáng 1*, Min Deng , Yáo T. Li1, Hua Huang2, Jason Chi Shun Leung3, Weitian Chen1, and Pu-Xuan Lu4* Abstract Intravoxel incoherent motion (IVIM) imaging is a concept and a method initially introduced and developed by Le Bihan et al.

Intravoxel Incoherent Motion Imaging of Tumor Microenvironment in Locally Advanced Breast Cancer - PubMed Diffusion-weighted imaging plays important roles in cancer diagnosis, monitoring, and treatment. Abstract Purpose: To systematically analyze intravoxel incoherent motion (IVIM) MRI in a perfusable capillary phantom closely matching the geometry of capillary beds in vivo and to compare the validity of the biexponential pseudo-diffusion and the recently introduced phase-distribution IVIM model. At very low diffusion weighting the diffusion MRI signal is affected by intravoxel incoherent motion (IVIM) caused by dephasing of magnetization due to incoherent blood flow in capillaries or other sources of microcirculation. The aim of the study was to compare intravoxel incoherent motion diffusion-weighted imaging (DWI) for evaluating lung cancer using single-shot turbo spin-echo (TSE) and single-shot echo-planar imaging (EPI) in a 3T MR system.
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Background. As both intravoxel incoherent motion (IVIM) modeling and dynamic contrast‐enhanced magnetic resonance imaging (DCE‐MRI) provide perfusion parameters, IVIM‐derived perfusion parameters might be expected to correlate with the kinetic features from DCE‐MRI.

Preliminary Assessment of Intravoxel Incoherent Motion Diffusion‐Weighted MRI (IVIM‐DWI) Metrics in Alzheimer's Disease Maurizio Bergamino PhD Division of Neuroimaging Research, Barrow Neurological Institute, Phoenix, Arizona, USA intravoxel dephasing: ( in'tră-voks'ĕl dē-fāz'ing ) Phase difference between flow and stationary nuclei in a voxel. The intravoxel incoherent motion (IVIM) theory, proposed by Le Bihan et al. 3, enables evaluation of living tissue diffusion movement and micro-vessel perfusion in vivo using quantitative Background As both intravoxel incoherent motion (IVIM) modeling and dynamic contrast‐enhanced magnetic resonance imaging (DCE‐MRI) provide perfusion parameters, IVIM‐derived perfusion parameters might be expected to correlate with the kinetic features from DCE‐MRI. To address these issues, this paper develops an intravoxel incoherent motion- (IVIM-) MRI-based histogram analysis approach, which takes advantage of several hyperspectral techniques, such as the band expansion process (BEP), to expand a multispectral image to hyperspectral images and create an automatic target generation process (ATGP).