Diffusion MRI
Building connectomes using diffusion MRI: why, how and but
... has diffusion MRI become a principal modality for mapping connectomes in vivo? How do different image acquisition parameters, fiber tracking algorithms and other methodological choices affect connectome ...
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Diffusion MRI quantifies early axonal loss in the presence of nerve swelling
... [12–14]. Diffusion tensor imaging (DTI), in particular, is one of the commonest tools for evaluating white matter disease as, under some circumstances, it can distinguish axonal injury from demyelination ...new ...
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Automated processing pipeline for neonatal diffusion MRI in the developing Human Connectome Project
... multi-modal MRI data from fetuses and newborn infants is currently being acquired, along with genetic, clinical and developmental ...neonatal diffusion MRI (dMRI) image processing pipeline and the ...
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Resolving degeneracy in diffusion MRI biophysical model parameter estimation using double diffusion encoding
... Our work shows that modifying the diffusion MRI pulse sequence can mitigate the degeneracy on NODDIDA’s pa- rameter estimation. Our proposal circumvents the need of presetting diffusivities to a priori ...
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Advances in diffusion MRI acquisition and processing in the Human Connectome Project
... for diffusion MRI, based on the data presented here: 1) Instead of averaging data, we strongly recommend acquisition of two reversed phase-encoding ...
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Building connectomes using diffusion MRI: why, how and but
... has diffusion MRI become a principal modality for mapping connectomes in vivo? How do different image acquisition parameters, fiber tracking algorithms and other methodological choices affect connectome ...
52
RubiX: combining spatial resolutions for Bayesian inference of crossing fibers in diffusion MRI
... The methods proposed so far utilize a single spatial resolution and can be categorized according to their q-space sampling patterns. Single-shell, high-angular resolution diffusion imaging (HARDI) methods utilize ...
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Diffusion MRI in early cancer therapeutic response assessment
... dependent on many factors. Histogram analysis of ADC values throughout the tumor is one approach to address heterogeneity (83,84). Although a variety of scalar quantities are derivable from tumor ADC histogram analysis, ...
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FLAIR and Diffusion MRI Signals Are Independent Predictors of White Matter Hyperintensities
... opment of WMH is clinically relevant for a number of reasons: First and foremost, cross-sectional studies have found that WMH are consistently associated with cognitive impairment,11 inc[r] ...
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Visual recovery after perinatal stroke evidenced by functional and diffusion MRI: case report
... related approach was used, with stimulus (2 Hz visual flash) duration of 5 sec repeated 15 times with an inter- stimulus interval of 30 sec. Flashing frequency of 2 Hz was used as it yields robust visual evoked ...
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Reduced Distortion Diffusion MRI of the Craniovertebral Junction
... D WI and DTI have become standards for evaluating neu- rologic disorders such as acute brain ischemia, intracra- nial lesions, and white matter diseases. 1,2 However, diffusion MR imaging has not been so ...
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Image quality transfer and applications in diffusion MRI
... This paper introduces a new computational imaging technique called image quality transfer (IQT). IQT uses machine learning to transfer the rich information available from one-o ff experimental medical imaging devices to ...
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Diffusion MRI Findings in Monochorionic Twin Pregnancies after Intrauterine Fetal Death
... lesion, diffusion of water molecules within the tissue is hindered by the swelling of cells and restriction of extracellular space, which are associated with the development of cytotoxic ...
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ROLE OF MRI AND DIFFUSION MRI IN EVALUATION OF PELVIC MASSES OF GYNAECOLOGICAL ORIGIN
... Diffusion-weighted magnetic resonance (MR) imaging is a functional imaging technique whose contrast derives from the random motion of water molecules within tissues and its use has been established as a useful ...
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Monte Carlo Simulations of Diffusion Weighted MRI in Myocardium: Validation and Sensitivity Analysis
... the diffusion signal improves with larger sphere radius or separation between parallel planes ...of MRI signals to experimental data, and can therefore be considered to be a useful tool in investigating ...
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Brain Tumor Segmentation of Noisy MRI Images using Anisotropic Diffusion Filter
... noisy MRI images using anisotropic diffusion filter and morphological ...Anisotropic diffusion filter is a method for removing noise which is proposed by Perona and Malik [ ...
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Functional imaging with diffusion weighted MRI for lung biopsy planning: initial experience
... [6]. Recent studies have evaluated the use of DWI to distinguish malignant from benign lesions [8]. Malignant tumors have high degrees of cellularity with reduced extracellular space, which decreases the diffusion ...
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MRI diffusion weighted imaging (DWI) of spleen in patients with cirrhosis and portal hypertension.
... Normalization of ADC using a reference organ which remains relatively constant among patients have been used in earlier studies to aid in reduction of ADC calculation variability. 8, 12, 95, 98 Earlier studies used ...
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Reduced Diffusion in a Subset of Acute MS Lesions: A Serial Multiparametric MRI Study
... Conventional MRI On initial MRI, all lesions subject to analysis showed slight hyperintense signal intensity on T2-weighted images, which became more pronounced and increased in size (examples are shown in ...
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A Search for MRI diffusion coefficient standards
... have diffusion vary with ...have diffusion vary with the shape of a ...restricted diffusion due to the shape of the container. Diffusion of particles in a narrow cylinder with long axis along ...
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