Browsing by Subject "MRI"
Now showing items 21-40 of 41
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(2016-11-07)Department: Biomedical EngineeringDue to the need to acquire a series of T2-weighted images, quantitative T2 mapping protocols in magnetic resonance imaging (MRI) suffer from long scan times. In order to alleviate this problem, fast spin-echo (FSE) imaging ...
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(2015-04-17)Department: PhysicsConventional MRI is sensitive to detect brain abnormalities non-invasively through excellent contrast generated by variation in relaxation times and water proton density. However, conventional MRI lacks the specificity and ...
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(2016-06-06)Department: NeuroscienceBody weight is tightly controlled by the homeostatic feeding system, which is primarily reliant upon communication between the endocrine system and the brain. The endocrine system and brain are highly complex systems with ...
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(2010-11-19)Department: Biomedical EngineeringWith cancer encompassing a range of disease states and phenotypes, assessing treatment efficacy early, accurately, and non-invasively is essential to optimize therapy planning on an individualized basis. This work discusses ...
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(NMR in Biomedicine, 2020-02)Skeletal muscle phosphorus-31 P-31 MRS is the oldest MRS methodology to be applied to in vivo metabolic research. The technical requirements of P-31 MRS in skeletal muscle depend on the research question, and to assess ...
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(Frontiers In Aging Neuroscience, 2022-12-09)Many people with coronavirus disease 2019 (COVID-19) report varying degrees of memory impairment. Neuroimaging techniques such as MRI and PET have been utilized to shed light on how COVID-19 affects brain function in humans, ...
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(2011-08-30)Department: Biomedical EngineeringConventional magnetic resonance imaging (MRI) uses contrast that is weighted by the intrinsic tissue parameters T1, and T2. Contrast may also be generated in the rotating frame with the analogous time constants T1ρ or T2ρ. ...
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(2015-05-22)Department: Biomedical EngineeringSimultaneous multislice (SMS) imaging is a scan acceleration method where mul- tiple slices are simultaneously excited using a multiband pulse and the aliased slice images are separated in reconstruction using the receive ...
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(Vanderbilt University, 2008-09-10)This poster explores the spatial and temporal pattern of muscle activation during stationary cycling using surface EMG (Electromyography) and mfMRI (Muscle functional MRI). Two females and two males, all four recreationally ...
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(2006-12-06)Department: Biomedical EngineeringMost functional MRI studies rely on fast Echo Planar Imaging, which is sensitive to magnetic susceptibility effects. These effects can lead to image-to-image signal instability, reducing the reliability of functional ...
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(Vanderbilt University. Deptartment of Physics and Astronomy, 2013-04-22)Chemical Exchange Saturation Transfer (CEST) is often overlooked as a method for the investigation of metabolites in vivo due to the time required to obtain a full spectrum. We investigated the feasibility and optimization ...
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(Neuroimage-/Clinical, 2019)Abstract Purpose: This study aims to systematically evaluate the accuracy and precision of pool size ratio (PSR) measurements from quantitative magnetization transfer (qMT) acquisitions using simplified models in the ...
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(2012-03-31)Department: NeuroscienceThe midbrain dopamine system located within the ventral tegmental area (VTA) and substantia nigra (SN) contain dopaminergic (DA) neurons that are known to mediate various goal directed behaviors. Although research with ...
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(2011-11-23)Department: Biomedical EngineeringCurrent clinical bone diagnostic measures rely predominantly on X-ray-based contrast and are primarily sensitive to bone mineral content. Since bone also contains collagen and water components, which are heavily implicated ...
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(Orthopaedic Journal of Sports Medicine, 2019-08-09)Background: In the setting of anterior shoulder instability, it is important to assess the reliability of orthopaedic surgeons to diagnose pathologic characteristics on the 2 most common imaging modalities used in clinical ...
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(2011-12-12)Department: Biomedical EngineeringA statistical analysis of the magnetic resonance imaging-based mcDESPOT method for characterizing two exchanging water proton pools--a seven-dimensional problem that fits to multiple flip angle measurements of both spoiled ...
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(2015-07-06)Department: PhysicsDiffusion MRI provides a non-invasive means to characterize tissue microstructure at varying length scales. Apparent diffusion coefficients (ADCs) of tissue water may be measured at relatively long diffusion times with ...
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(2015-11-20)Department: Biomedical EngineeringThe goal of this research is to develop image reconstruction techniques to automatically correct for errors in Magnetic Resonance Imaging (MRI) data due to errors in the trajectory used in the data acquisition. A method ...
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(2017-11-27)Department: Biomedical EngineeringHigh field magnetic resonance imaging (MRI) offers several advantages over imaging at low field strengths, namely increased spectral resolution, better contrast due to longer T1 relaxation, higher signal to noise ratio ...
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(2013-04-12)Department: Biomedical EngineeringA fast approach to reconstruct transmit RF field (|B1+|) maps in high field parallel Magnetic Resonance Imaging is presented in this thesis. First the concepts of parallel imaging reconstruction and the Bloch-Siegert (BS) ...