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Dissertations / Theses on the topic 'Diffusion Weighted Imaging'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Shimizu, Hironori. "Comparison of acquired diffusion weighted imaging and computed diffusion weighted imaging for detection of hepatic metastases." Kyoto University, 2015. http://hdl.handle.net/2433/200435.

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2

Williams, Catherine F. M. "Diffusion-weighted magnetic resonance imaging techniques." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602003.

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The aim of this project was to compare and evaluate other, non-EPI, diffusion-weighted MRI (DWI) sequences, through imaging experiments, on a phantom and in vivo, (using a 0.95 T system) and computer simulations, and to develop improved DWI methodology which could be implemented on standard hardware. Pulsed gradient spin echo (PGSE) and diffusion-weighted STEAM are slow multiple shot sequences, with measurement times of several minutes. Both sequences are highly sensitive to patient motion, but motion artifact was virtually eliminated using navigator echo phase correction and EGG triggering wh

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3

McNab, Jennifer A. "High Resolution Diffusion-Weighted Magnetic Resonance Imaging." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504436.

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4

Sahalan, Mariaulpa. "Diffusion-weighted Imaging of Lymph Node Tissue." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20070.

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Purpose: The study investigates the hypothesis of clinically observed decreased apparent diffusion coefficient (ADC) of cancerous lymph nodes can be attributed to increased cellularity. The study characterises the mean diffusivity (MD) of lymph node sub-structures and investigates correlation between MD and cellularity metrics. The study also investigates the theoretical information content of single and multi-biophysical models. Methods:. A 3 mm diameter core sample was extracted from a formalin fixed lymph node tissue post-surgery and imaged using 9.4T and 16.4T Bruker MRI system. Samples

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5

Young, Victoria Eleanor Louise. "Enhancement of carotid magnetic resonance imaging with diffusion weighted imaging." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648278.

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6

Omar, Nur Farhayu. "Diffusion weighted imaging and relaxometry in abdominal organs." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/35939/.

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This thesis presents the application of diffusion weighted imaging (DWI) and relaxometry MRI studies in three organs in the abdomen, the kidney, colon and liver. These methods are first applied at 1.5 Tesla in healthy volunteers and patients with Cardiorenal Syndrome (CRS), a clinical condition in which cardiac and renal dysfunctions (RD) coexist. Diffusion parameters are determined using the mono-exponential ADC, bi-exponential IVIM, stretched-exponential and Kurtosis models, as well as diffusion tensor imaging (DTI) in order to assess pathophysiology and structural changes in the kidney. Com

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7

Godley, Keith. "Focused diffusion-weighted imaging in prostate cancer (FODIP)." Thesis, University of East Anglia, 2017. https://ueaeprints.uea.ac.uk/67777/.

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Background: MRI of the prostate is used to detect and localise prostate cancer and diffusion weighted imaging (DWI) is a routine sequence. The purpose of the study was to determine the diagnostic accuracy of high b-value DWI through meta-analyses. Additionally, the aim was to determine the diagnostic accuracy of a novel combined small field-of-view (FOV) and high b-value DWI sequence for detecting and localising prostate cancer. Material and Methods: Meta-analyses of diagnostic test accuracy of high b-value DWI, and T2WI and DWI combined, were performed conforming to the PRISMA statement. A pr

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8

Frost, Stephen Robert. "Diffusion-weighted magnetic resonance imaging with readout-segmented echo-planar imaging." Thesis, University of Oxford, 2012. https://ora.ox.ac.uk/objects/uuid:94421cdc-6bcb-49c2-b9d9-64e016b875f8.

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Diffusion-weighted (DW) magnetic resonance imaging is an important neuroimaging technique that has successful applications in diagnosis of ischemic stroke and methods based on diffusion tensor imaging (DTI). Tensor measures have been used for detecting changes in tissue microstructure and for non-invasively tracing white matter connections in vivo. The most common image acquistion strategy is to use a DW single-shot echo-planar imaging (ss-EPI) pulse sequence, which is attractive due to its robustness to motion artefacts and high imaging speed. However, this sequence has limited achievable spa

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9

Mosavi, Firas. "Whole-Body MRI including Diffusion-Weighted Imaging in Oncology." Doctoral thesis, Uppsala universitet, Enheten för radiologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-209777.

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Cancer is one of the major causes of worldwide mortality. Imaging plays a vital role in the staging, follow-up, and evaluation of therapeutic response in cancer patients. Whole-body (WB) magnetic resonance imaging (MRI), as a non-ionizing imaging technique, is a promising procedure to assess tumor spreading in a single examination. New MRI technological developments now enable the application of diffusion-weighted imaging (DWI) of the entire body. DWI reflects the random motion of water molecules and provides functional information of body tissues. DWI can be quantified with the use of the app

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10

Nunes, Rita G. "Development of diffusion-weighted imaging at high magnetic field." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424867.

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11

McGraw, Tim E. "Denoising, segmentation and visualization of diffusion weighted MRI." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011618.

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12

Nguyen, Quyen. "Quantitative diffusion weighted imaging : techniques and applications to perinatal asphyxia." Thesis, University College London (University of London), 2001. http://discovery.ucl.ac.uk/1382401/.

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This thesis describes the results of a study to investigate early cerebral changes in a piglet model of perinatal asphyxia using quantitative diffusion-weighted imaging (DWI) and subsequent work to develop a robust DWI technique to enable similar studies to be performed in neonates. 31Phophorus magnetic resonance spectroscopy and quantitative diffusion and T2 imaging of the cerebrum were performed in a piglet model of perinatal asphyxia. A significant decline in the ratio of phosphocreatine to inorganic phosphate concentrations ([PCr]/[Pi]) was observed during the 48 hours following the transi

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13

MacGillivray, Cathy Carleton University Dissertation Physics. "Diffusion-weighted MR imaging of moving structures using a three echo navigator imaging technique." Ottawa, 1996.

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14

Plicco, Chiara. "Le metodiche di Diffusion Weighted Imaging per la caratterizzazione della malattia policistica renale." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11202/.

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La tecnica di Diffusion Weighted Imaging (DWI) si basa sullo studio del moto diffusivo delle molecole d’acqua nei tessuti biologici ed è in grado di fornire informazioni sulla struttura dei tessuti e sulla presenza di eventuali alterazioni patologiche. Il più recente sviluppo della DWI è rappresentato dal Diffusion Tensor Imaging (DTI), tecnica che permette di determinare non solo l’entità, ma anche le direzioni principali della diffusione. Negli ultimi anni, grazie ai progressi nella tecnica di risonanza magnetica, l’imaging di diffusione è stato anche applicato ad altri distretti anatomici t

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15

Biffar, Andreas. "Quantitative Analysis of Diffusion-weighted Magnetic Resonance Imaging in the Spine." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-126230.

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16

Leclair, Nadine, Gregor Thörmer, Ina Sorge, Lutz Ritter, Volker Schuster, and Franz Wolfgang Hirsch. "Whole-body diffusion-weighted imaging in chronic recurrent multifocal osteomyelitis in children." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-204133.

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Objective: Chronic recurrent multifocal osteomyelitis/ chronic non-bacterial osteomyelitis (CRMO/CNO) is a rare auto-inflammatory disease and typically manifests in terms of musculoskeletal pain. Because of a high frequency of musculoskeletal disorders in children/ adolescents, it can be quite challenging to distinguish CRMO/ CNO from nonspecific musculosketetal pain or from malignancies. The purpose of this study was to evaluate the visibility of CRMO lesions in a whole-body diffusion-weighted imaging (WB-DWI) technique and its potential clinical value to better characterize MR-visible lesion

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17

Metwalli, Nader. "High angular resolution diffusion-weighted magnetic resonance imaging: adaptive smoothing and applications." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34854.

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Diffusion-weighted magnetic resonance imaging (MRI) has allowed unprecedented non-invasive mapping of brain neural connectivity in vivo by means of fiber tractography applications. Fiber tractography has emerged as a useful tool for mapping brain white matter connectivity prior to surgery or in an intraoperative setting. The advent of high angular resolution diffusion-weighted imaging (HARDI) techniques in MRI for fiber tractography has allowed mapping of fiber tracts in areas of complex white matter fiber crossings. Raw HARDI images, as a result of elevated diffusion-weighting, suffer from de

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Khayal, Inas Samir. "Characterization of diffusion weighted magnetic resonance imaging for patients with brain tumors." Diss., Search in ProQuest Dissertations & Theses. UC Only, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3378496.

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Thesis (Ph.D.)--University of California, San Francisco with the University of California, Berkeley, 2009.<br>Source: Dissertation Abstracts International, Volume: 70-10, Section: B, page: 6381. Adviser: Sarah J. Nelson.

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Lawrence, Edward Malnor. "Quantitative diffusion-weighted magnetic resonance imaging for the assessment of prostate cancer." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709007.

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20

Rapacchi, Stanislas. "Low b-values diffusion weighted imaging of the in vivo human heart." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10012/document.

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L'Imagerie par Résonance Magnétique pondérée en Diffusion (IRM-D) permet l'accès à l'information structurelle des tissus au travers de la lecture du mouvement brownien des molécules d'eau. Ses applications sont nombreuses en imagerie cérébrale, tant en milieu clinique qu'en recherche. Néanmoins le mouvement physiologique créé une perte de signal supplémentaire au cours de l'encodage de la diffusion. Cette perte de signal liée au mouvement limite les applications de l'IRM-D quant à l'imagerie cardiaque. L'utilisation de faibles valeurs de pondération (b) réduit cette sensibilité mais permet seu

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Cook, Philip Anthony. "Modelling uncertainty in brain fibre orientation from diffusion-weighted magnetic resonance imaging." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1445463/.

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Diffusion-weighted magnetic resonance imaging (DW-MRI) permits in-vivo measurements of water diffusion, from which we can infer the orientation of white matter fibres in the brain. We show that by ordering the measurements, we can improve the reproducibility of the fibre-orientation estimate from partially-completed DW-MRI scans, without altering the complete data set. Tractography methods reconstruct entire fibre pathways from the local fibre-orientation estimates. Because the local fibre-orientation measurements are subject to uncertainty, the reconstructed fibre pathways are best described

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22

Theilmann, Rebecca Jean. "High-resolution diffusion imaging with DIFRAD-FSE (diffusion-weighted radial acquisition with fast spin echo) MRI." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/284332.

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A novel MRI method, DIFRAD-FSE (D̲i̲f̲fusion with R̲adial A̲cquisition of D̲ata with F̲ast S̲pin-E̲cho) is presented that enables rapid, high-resolution, multi-shot diffusion-weighted MRI without significant artifacts due to motion. Following a diffusion-weighted spin-echo preparation, multiple radial lines of Fourier data are acquired using spin-echo refocusing. Data can be acquired in either 2D or 3D Fourier space. Motion correction is accomplished via one of four correction techniques: phase correction, shift correction, a combination of the phase and shift correction, or magnitude. Images

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23

McHugh, Damien Joseph. "The effect of tumour microstructure on diffusion-weighted MRI measurements." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/the-effect-of-tumour-microstructure-on-diffusionweighted-mri-measurements(9821717e-df69-4dd0-baf7-51cf27a18aa2).html.

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By sensitising the magnetic resonance signal to the diffusion of water molecules in tissue, diffusion-weighted magnetic resonance imaging provides a means of assessing tumour microstructure non-invasively. Such measurements have the potential to provide important information about tumour development and the response of tumours to treatment, but the way in which different tissue properties affect the diffusion-weighted signal remains unclear. Through simulations, in vivo studies and phantom experiments, this thesis investigates the relationship between the diffusion-weighted signal, the pulse s

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Tokunaga, Koji. "Optimizing b‐values for accurate depiction of pancreatic cancer with tumor-associated pancreatitis on computed diffusion-weighted imaging." Kyoto University, 2020. http://hdl.handle.net/2433/253187.

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25

Schob, Stefan, Jonas Meyer, Matthias Gawlitza, et al. "Diffusion-weighted MRI reflects proliferative activity in primary CNS lymphoma." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-210909.

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Purpose: To investigate if apparent diffusion coefficient (ADC) values within primary central nervous system lymphoma correlate with cellularity and proliferative activity in corresponding histological samples. Materials and Methods: Echo-planar diffusion-weighted magnetic resonance images obtained from 21 patients with primary central nervous system lymphoma were reviewed retrospectively. Regions of interest were drawn on ADC maps corresponding to the contrast enhancing parts of the tumors. Biopsies from all 21 patients were histologically analyzed. Nuclei count, total nuclei area and average

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Umapathy, Lavanya, and Lavanya Umapathy. "Assessment of White Matter Integrity in Bonnet Macaque Monkeys using Diffusion-weighted Magnetic Resonance Imaging." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/622837.

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Diffusion-weighted magnetic resonance imaging (dMRI) has been used to non-invasively investigate the integrity of white matter and the connectivity of the brain. In this work, high angular resolution diffusion imaging (HARDI), an advanced dMRI methodology was developed and employed in bonnet macaque monkeys to study the connectivity of the orbitofrontal cortex (OFC) and amygdala, two gray matter regions involved in making reward-guided decisions. With age, it is believed that there is a decline in the white matter connectivity between these two regions, also known as uncinate fasciculus (UF),

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27

Kanao, Shotaro. "Differentiating benign and malignant inflammatory breast lesions: Value of T2 weighted and diffusion weighted MR images." Kyoto University, 2019. http://hdl.handle.net/2433/236592.

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28

Kerttula, L. (Liisa). "Magnetic resonance imaging of the intervertebral disc:post-traumatic findings and the value of diffusion-weighted MR imaging." Doctoral thesis, University of Oulu, 2001. http://urn.fi/urn:isbn:9514264711.

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Abstract Magnetic resonance imaging (MRI) provides important information about structural and biochemical changes in organs. MRI is also an effective imaging method for the evaluation of spinal disorders. However, many of its potential applications - particularly diffusion imaging - have not yet been thoroughly explored. The purpose of this study was to determine the MRI-detectable changes in the intervertebral disc after trauma and to test the feasibility of diffusion-weighted MR imaging of the intervertebral discs. A minipig model was used in the experimental study to determine the MRI c

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Candrák, Matúš. "Zpracování difuzně vážených obrazů pořízených MR tomografem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220983.

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The semester thesis describes the basic principles of MRI, methods for measuring diffusion coefficients and creating DWI and DTI images. As a result a practical implementation of program was implemented in Matlab, based on theoretical knowledge of the problem.

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Coope, David John. "Use of [11C]-methionine PET and diffusion-/perfusion-weighted MR imaging in gliomas." Thesis, University of Manchester, 2010. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:207525.

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Introduction: Low-grade gliomas are a sub-group of primary brain tumours that typically affect young adults and which present specific challenges to conventional diagnostic imaging. They demonstrate a pattern of growth whereby tumour cells infiltrate healthy brain tissue without distortion of the surrounding brain or blood-brain barrier integrity. These features limit the capacity of conventional neuro-imaging strategies to effectively delineate the tumour extent or characterise the degree of 'malignancy'. One solution is to apply multiple imaging modalities to image different aspects of the t

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Yang, Sheng Yang. "A Simplified Estimation Model for Two Crossing Fiber Orientations in Diffusion Weighted Imaging." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1531760896809294.

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32

Teh, Irvin Tze Wei. "Development of methodologies for diffusion-weighted magnetic resonance imaging at high field strength." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/4715.

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Diffusion-weighted imaging of small animals at high field strengths is a challenging prospect due to its extreme sensitivity to motion. Periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) was introduced at 9.4T as an imaging method that is robust to motion and distortion. Proton density (PD)-weighted and T2-weighted PROPELLER data were generally superior to that acquired with single-shot, Cartesian and echo planar imaging-based methods in terms of signal-to-noise ratio (SNR), contrast-to-noise ratio and resistance to artifacts. Simulations and experiments r

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33

Tamai, Ken. "The utility of diffusion-weighted MR imaging in the diagnosis of uterine malignancy." Kyoto University, 2008. http://hdl.handle.net/2433/135802.

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34

Coad, Bethany. "Neurocognitive networks for social cognition : insights from diffusion weighted imaging and frontotemporal dementia." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/111503/.

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Empathy is a complex and multicomponent social cognitive function. It is underpinned by large-scale neurocognitive networks, the precise cognitive and neural structure of which remains debated. Despite this, relatively little work has considered the cognitive or neural components of empathy at the network-level. Here I present work using diffusion weighted magnetic resonance imaging (DWI) in healthy adults, and cognitive and behavioural assessment in a relatively rare form of dementia, the behavioural variant of frontotemporal dementia (bvFTD). Using these methods I explore: (a) the relationsh

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35

Moribata, Yusaku. "Feasibility of Computed Diffusion Weighted Imaging and Optimization of b-value in Cervical Cancer." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225457.

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36

Nakajima, Satoshi. "Primary central nervous system lymphoma and glioblastoma: differentiation using dynamic susceptibility-contrast perfusion-weighted imaging, diffusion-weighted imaging, and 18F-fluorodeoxyglucose positron emission tomography." Kyoto University, 2016. http://hdl.handle.net/2433/204580.

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37

Bishop, James Hart. "Imaging Pain And Brain Plasticity: A Longitudinal Structural Imaging Study." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/786.

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Chronic musculoskeletal pain is a leading cause of disability worldwide yet the mechanisms of chronification and neural responses to effective treatment remain elusive. Non-invasive imaging techniques are useful for investigating brain alterations associated with health and disease. Thus the overall goal of this dissertation was to investigate the white (WM) and grey matter (GM) structural differences in patients with musculoskeletal pain before and after psychotherapeutic intervention: cognitive behavioral therapy (CBT). To aid in the interpretation of clinical findings, we used a novel porci

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Matsui, Joy Tamiko. "Development of image processing tools and procedures for analyzing multi-site longitudinal diffusion-weighted imaging studies." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/4690.

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The logistical complexities of performing multi-site longitudinal diffusion-weighted imaging (DWI) studies requires careful construction of analysis tools and procedures. Proposed clinical trials for therapies in neurodegenerative disease are known to re- quire several hundred subjects, thus mandating multiple site participation to obtain sufficient sample sizes. DWI is an important tool for monitoring diffusivity properties of white matter (WM) in disease progression. The multi-site nature of clinical trials requires new strategies in DWI processing and analysis to reliably measure longitudi-

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Tisserand, Marie. "Evolution des lésions ischémiques aiguës en IRM de diffusion." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015PA05T026/document.

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Après traitement d’un AIC par thrombolyse, les lésions ischémiques en diffusion peuvent être réversibles, stables et/ou progresser. Cette thèse a pour objectif d’étudier en IRM ces phénomènes de réversibilité et de progression, de mieux comprendre leur physiopathologie, et d’appréhender le rôle pronostic du volume des lésions en diffusion. La réversibilité en diffusion a été rapportée après recanalisation artérielle, chez l’animal et chez l’homme. Dans notre cohorte de 155 patients, nous avons étudié ce phénomène par une analyse voxel à voxel sur des IRM avant et 24h après thrombolyse. Nous av

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Bajammal, Mohammad Salem. "Acquisition- and modeling-independent resolution enhancement of brain diffusion-weighted magnetic resonance imaging volumes." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58945.

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Diffusion-weighted magnetic resonance imaging (dwMRI) provides unique capabilities for non-invasive imaging of neural fiber pathways in the brain. dwMRI is an increasingly popular imaging method and has promising diagnostic and surgical applications for Alzheimer's disease, brain tumors, and epilepsy, to name a few. However, one limitation of dwMRI (specifically, the more common diffusion tensor imaging scheme, DTI) is that it suffers from a relatively low resolution. This often leads to ambiguity in determining location and orientation of neural fibers, and therefore reduces the reliability o

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Tozer, Daniel John. "In vivo diffusion-weighted studies in the prostate and breast using echo-planar imaging." Thesis, University of Hull, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272008.

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Forbes, K. P. N. "Diffusion-weighted imaging in brain ischaemia : clinical studies and assessment of a novel technique." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599098.

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Yang, Jia [Verfasser], and Christopher [Akademischer Betreuer] Nimsky. "Investigation on the optimization approaches of diffusion weighted imaging / Jia Yang ; Betreuer: Christopher Nimsky." Marburg : Philipps-Universität Marburg, 2019. http://d-nb.info/1198401613/34.

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Lockwood, Estrin Georgia. "Diffusion weighted magnetic resonance imaging of in utero and ex utero human brain development." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24997.

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The primary objective of this thesis was to establish quantitative measurements of normal fetal brain tissue across gestation using diffusion magnetic resonance imaging (MRI); the secondary aim was to compare diffusion metrics in fetuses with normal brain development to those with isolated ventriculomegaly (VM), congenital heart disease and in infants born preterm. Fetal diffusion weighted imaging (DWI) was optimised, and a motion-corrected diffusion tensor imaging (DTI) technique was utilized to produce apparent diffusion coefficient (ADC) and fractional anisotropy (FA) values across gestatio

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Jepsen, Peter Austin. "Improvements in Diffusion Weighted Imaging Through a Composite Body and Insert Gradient Coil System." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3700.

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Diffusion Magnetic Resonance Imaging (DMRI) is a class of Magnetic Resonance Imaging (MRI) techniques with broad medical applications ranging from characterization of tumors and brain damage to potential prediction of stroke. Gradient coil and signal-to- noise ratio (SNR) constraints limit spatial resolution, accuracy, and scan time in DMRI. Achieving high b-values (measures of a scan's sensitivity to diffusion) often require scans with long diffusion gradient pulses, leading to significant magnetic resonance (MR) signal decay before the signal can be sampled. This signal loss reduces the accu

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Novello, Lisa. "Towards Improving the Specificity of Human Brain Microstructure Research with Diffusion-Weighted MRI." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/342277.

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The possibility to perform virtual, non-invasive, quantitative, in vivo histological assessments might revolutionize entire fields, among which clinical and cognitive neurosciences. Magnetic Resonance Imaging (MRI) is an ideal non-invasive imaging technique to achieve these goals. Tremendous advancements in the last decades have favored the transition of MRI scanners from “imaging devices” to “measurement devices” (Novikov, 2021), thus capable to yield measurements in physical units, which might be further combined to provide quantities describing histological properties of substrates. A centr

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Ma, Jun. "Diffusion- and perfusion-weighted magnetic resonance imaging in patients with acute ischemic stroke: can diffusion/perfusion mismatch predict outcome?" Diss., lmu, 2004. http://nbn-resolving.de/urn:nbn:de:bvb:19-28672.

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48

Niinimäki, J. (Jaakko). "Diffusion-weighted MRI and delayed contrast enhancement of degenerated intervertebral disc." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514291715.

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Abstract Magnetic resonance imaging (MRI) provides methods to study the microstructure and functional properties of tissues that can be utilized to acquire information about the degenerative processes in the spine. The purpose of the current study was to evaluate the value of diffusion-weighted MRI and quantification of delayed gadolinium enhancement in assessing intervertebral disc degeneration. An experimental degeneration model was used to evaluate the sensitivity of diffusion-weighted MRI and T2 relaxation time measurements in detecting early degenerative changes in the disc. In six pigs,

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Butler, Rebecca. "Using diffusion weighted imaging to map changes in white matter connectivity in chronic stroke aphasia." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/using-diffusion-weighted-imaging-to-map-changes-in-white-matter-connectivity-in-chronic-stroke-aphasia(287f2b2a-3bdd-492a-ab90-ca9cb7c9ad90).html.

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The role of white matter pathways in language networks has received much attention inrecent years. This is largely due to advances in diffusion imaging techniques, which haveenabled exploration of white matter properties in vivo. The emergent model from suchwork proposes that language processing is underpinned by a dorsal and a ventral pathwayconnecting anterior and posterior regions involved in language. This thesis aimed toexplore whether consideration of white matter measures could aid understanding ofperformance profiles in chronic stroke aphasia. To this end, a group of participants withc

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Furuta, Akihiro. "Comparison of monopolar and bipolar diffusion weighted imaging sequences for detection of small hepatic metastases." Kyoto University, 2015. http://hdl.handle.net/2433/195942.

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