Neuroradiologi - Department of Surgical Sciences - Uppsala

CENIIT Projects 2021 - Linköpings universitet

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. Objectives: The diagnostic performance of intravoxel incoherent motion diffusion–weighted imaging (IVIM-DWI) in the differential diagnosis of breast tumors remains debatable among published studies.

Intravoxel

• WARP använder sig av en hög bandbredd, båda vid RF puls och vid frekvenskodning gradient. • POSITIV: bilderna visar Apparent intravoxel fibre population dispersion (fpd) using spherical harmonics In this paper, we present a method for computing the apparent intravoxel Fibre Intravoxel inkoherent rörelse diffusionsviktad MR-avbildning av gliomas: effektivitet vid preoperativ klassificering. 2021-03-31 M. R., Makris, N., Belliveau, J. W., Wedeen, V. J. High angular resolution diffusion imaging reveals intravoxel white matter fiber heterogeneity. signalbortfall (”intravoxel phase dispersion”) ytterligare till överskattning av stenoser och ocklusioner [33]. Rakare kärlförlopp, som på lår och underben, ger Use of intravoxel incoherent motion imaging to monitor a rat kidney chronic allograft damage model.

OSCAR JALNEFJORD - Avhandlingar.se

Radiology 2008;249(3):748–752. 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).

Clinical Areas - Women's Health - Canon Medical Systems

• POSITIV: bilderna visar Apparent intravoxel fibre population dispersion (fpd) using spherical harmonics In this paper, we present a method for computing the apparent intravoxel Fibre Intravoxel inkoherent rörelse diffusionsviktad MR-avbildning av gliomas: effektivitet vid preoperativ klassificering. 2021-03-31 M. R., Makris, N., Belliveau, J. W., Wedeen, V. J. High angular resolution diffusion imaging reveals intravoxel white matter fiber heterogeneity. signalbortfall (”intravoxel phase dispersion”) ytterligare till överskattning av stenoser och ocklusioner [33]. Rakare kärlförlopp, som på lår och underben, ger Use of intravoxel incoherent motion imaging to monitor a rat kidney chronic allograft damage model. Article. Full-text available.

The quality of the diffusion analysis can influence the reliability of the perfusion analysis. This study proposed In this project, the potential of magnetic resonance (MR) imaging and spectroscopy in studies of microcirculation and haemodynamics was evaluated. The spatial and temporal characteristics of human pulsatile brain-tissue movements in healthy individuals, relevant for the understanding of the cerebrospinal-fluid (CSF) circulation and the pathogenesis of hydrocephalus, were thoroughly investigated.
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(PhD project Daniel An Investigational Scan (Intravoxel Incoherent Motion Diffusion Weighted Imaging) for the Evaluation of Colorectal Cancer Liver Metastases Treatment Dyverfeldt, Petter 1980- (författare); Quantification of intravoxel velocity standard deviation and turbulence intensity by generalizing phase-contrast MRI Specific implementation issues for setting up of the calculation grid, handling of intravoxel gradients and voxels partly containing non patient applicator material Sammanfattning : Intravoxel incoherent motion (IVIM) analysis provides a means to obtain information on diffusion and perfusion from a single MRI sequence. 1508 dagar, Intravoxel Incoherent Motion in Normal Pituitary Gland: Initial Study with Turbo Spin-Echo Diffusion-Weighted Imaging [HEAD & NECK]. 1508 dagar av M Nelander — Assessment of cerebral edema and perfusion in normal pregnancy and preeclampsia with intravoxel incoherent motion MRI Acta Obstet Gynecol Scand 2018 Assessment of cerebral perfusion and edema in preeclampsia with intravoxel incoherent motion MRI Nelander M., Hannsberger D., Sundström Poromaa I., Abnormal intravoxel cerebral blood flow heterogeneity in human ischemic stroke determined by dynamic susceptibility contrast magnetic resonance imaging. Comparison of methods for estimation of the intravoxel incoherent motion (IVIM) diffusion coefficient (D) and perfusion fraction (f) by Oscar Jalnefjord( ) 1 edition Abstract: Intra-Voxel Incoherent Motion (IVIM) is special Diffusion MR Imaging protocol that is acquired at multi bvalues using multiple diffusion MR Imaging of Intravoxel Incoherent Motions: Applications to Diffusion and Perfusion in Neurologic Disorders.

2014, 32(10). 1247-1258.
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Sökresultat för Diffusion Weighted Magnetic Resonance

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. Intravoxel incoherent motion (IVIM) can be seen as subfield of diffusion MRI. It allows tissue microcirculation (perfusion) to be investigated in addition to tissue microstructure (from molecular diffusion).

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Collapsed cone dose calculations for heterogeneous tissues

Crossref Medline Google Scholar; 15. 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 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. Se hela listan på academic.oup.com 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.

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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. Abstract. Intravoxel incoherent motion (IVIM) can be seen as subfield of diffusion MRI. It allows tissue microcirculation (perfusion) to be investigated in addition to tissue microstructure (from molecular diffusion). The intravoxel incoherent motion (IVIM) model describes diffusion and perfusion in the signal acquired with a diffusion MRI sequence that contains multiple low b-values.