Intravoxel incoherent motion (IVIM) refers to translational movements which within a given voxel and during the measurement time present a distribution of

PDF) Intravoxel incoherent motion modeling - Optimization of 3 POM produced in the surface layer is exported from fjords .

2019-09-30 · 1. Neuroimage. 2019 Sep 30;204:116228. doi: 10.1016/j.neuroimage.2019.116228. [Epub ahead of print] Effect of intravoxel incoherent motion on diffusion parameters in 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.

A simplified approach using linear fitting of a subset of higher b-values has seen success in other organ systems. 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). Intravoxel incoherent motion imaging was performed on a 3 T magnetic resonance imaging scanner using 15 b values (0–800 s/mm 2) for 4 phantoms with different area fractions of the flowing water compartment (FWC%), at the infusion flow rates of 0, 1, 2, and 3 mL/min.

1. Radiology. 2014 Feb;270(2):444-53. doi: 10.1148/radiol.13122712. Epub 2013 Oct 28. Intravoxel incoherent motion diffusion-weighted MR imaging for characterization of focal pancreatic lesions.

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.

Background and purpose: Intravoxel incoherent motion MR imaging can simultaneously measure the diffusion and perfusion characteristics of brain tumors. Our aim was to determine the utility of intravoxel incoherent motion-derived perfusion and diffusion parameters for assessing the treatment response of metastatic brain tumor following gamma knife radiosurgery.

553 - 562 , 10.1002/mrm.24277 Intravoxel incoherent motion imaging has the possibility to detect liver abnormalities in young Fontan patients with good hemodynamics - Volume 29 Issue 7 - Kazuhiro Shiraga, Kojiro Ono, Ryo Inuzuka, Hiroko Asakai, Takumi Ookubo, Akira Shirayama, Kouji Higashi, Hiromichi Nakajima 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 IVIM model can be understood as an adaptation of the work of Stejskal and Tanner [Stejskal65] in biological tissue, and was proposed by Le Bihan [LeBihan84]. The model assumes two compartments: a slow moving compartment 1. Radiology. 2014 Feb;270(2):444-53. doi: 10.1148/radiol.13122712. Epub 2013 Oct 28. Intravoxel incoherent motion diffusion-weighted MR imaging for characterization of focal pancreatic lesions.
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Radiology. 2014 Feb;270(2):444-53. doi: 10.1148/radiol.13122712. Epub 2013 Oct 28. Intravoxel incoherent motion diffusion-weighted MR imaging for characterization of focal pancreatic lesions.

Link, Google Scholar; 12 Le Bihan D, Breton E, Lallemand D, Aubin ML, Vignaud J, Laval-Jeantet M. Separation of diffusion and perfusion in intravoxel incoherent motion MR imaging. Radiology 1988;168(2):497–505. Link, Google Scholar 2021-01-19 · Background/objectives The aim of this study was to compare intravoxel incoherent motion (IVIM) diffusion weighted (DW) MRI and CT perfusion to assess tumor perfusion of pancreatic ductal adenocarcinoma (PDAC). Methods In this prospective study, DW-MRI and CT perfusion were conducted in nineteen patients with PDAC on the day before surgery.
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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

Intravoxel incoherent Mar 28, 2017 Our purpose was to correlate different intravoxel incoherent motion (IVIM), histopathological and clinical parameters in rectal cancer.

Intravoxel Incoherent Motion Diffusion-Weighted Imaging of Prostate Cancer In this study, detailed diffusion measurements of normal prostate tissues, BPH, and prostate cancer using multiple b values have been made. Biexponential fits were applied to the diffusion decay curves to …

to quantitatively assess all the microscopic translational motions that could contribute to the signal acquired with diffusion MRI. Background and purpose: Intravoxel incoherent motion MR imaging can simultaneously measure the diffusion and perfusion characteristics of brain tumors. Our aim was to determine the utility of intravoxel incoherent motion-derived perfusion and diffusion parameters for assessing the treatment response of metastatic brain tumor following gamma knife radiosurgery. 2019-09-30 · 1. Neuroimage.

5,6 IVIM separates the incoherent blood motion in the capillary bed from the incoherent motion because of thermal motion within the DWI signal using a double exponential signal equation, 7,8 which 2016-02-10 · Background Intravoxel incoherent motion (IVIM) MR imaging has been applied in researches of various diseases, however its potential in cervical cancer patients has not been fully explored. The purpose of this study was to investigate the feasibility of IVIM MR imaging to monitor early treatment response in patients receiving concurrent chemo-radiotherapy (CCRT) for advanced cervical cancers 2018-03-19 · Background Noninvasive cardiovascular magnetic resonance (CMR) techniques including arterial spin labeling (ASL), blood oxygenation level-dependent (BOLD), and intravoxel incoherent motion (IVIM), are capable of measuring tissue perfusion-related parameters. We sought to evaluate and compare these three CMR techniques in characterizing skeletal muscle perfusion in lower extremities and to Quantification of intravoxel velocity standard deviation and turbulence intensity by generalizing phase-contrast MRI Dyverfeldt, Petter, 1980- (author) Linköpings universitet,Centrum för medicinsk bildvetenskap och visualisering, CMIV,Klinisk fysiologi,Hälsouniversitetet,Mekanisk värmeteori och strömningslära,Tekniska högskolan 2021-03-15 · (2017) Meeus et al. Journal of Magnetic Resonance Imaging. Purpose: To investigate the robustness of constrained and simultaneous intravoxel incoherent motion (IVIM) fitting methods and the estimated IVIM parameters (D, D* and f) for applications in brain and low-perfused tissues.