Mr spectroscopic imaging
Sensitivity encoding for fast 1H MR spectroscopic imaging water reference acquisition
... H MR spectroscopic imaging (MRSI) water reference scans are important for absolute quan- tification of ...successful MR technique developed to reduce scan ...
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In Vivo Differentiation of Aerobic Brain Abscesses and Necrotic Glioblastomas Multiforme Using Proton MR Spectroscopic Imaging
... single-voxel MR spectroscopy is limited in voxel size from ...and MR spectroscopic imaging is also limited in voxel size of 1 ⫻ 1 ⫻ 1 cm, we could not collect meaningful spectra in smaller ...
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Serial Proton MR Spectroscopic Imaging of Recurrent Malignant Gliomas after Gamma Knife Radiosurgery
... Baseline imaging and spectroscopic examinations were ob- tained within a week before radiosurgery, and follow-up ex- aminations were acquired at approximately 2-month intervals thereafter until the ...
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Detection of Normal Aging Effects on Human Brain Metabolite Concentrations and Microstructure with Whole Brain MR Spectroscopic Imaging and Quantitative MR Imaging
... metabolite MR spectroscopy. The water reference MR spectroscopic imaging was used for several process- ing functions, including measurement and correction of the res- onance frequency offset ...
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Three dimensional Proton MR Spectroscopic Imaging of Premature and Term Neonates
... 3D MR spectroscopic imaging can play in important role in assessing these ...for MR spectroscopic imaging data averaged over all locations and for specific anatomic locations ...
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Quantitative Proton MR Spectroscopic Imaging in Acute Disseminated Encephalomyelitis
... Serial MR imaging and quantitative proton MR spectroscopic imaging (MRSI) findings of a 4-year-old boy with acute disseminated encephalomyelitis (ADEM) are re- ...recovery, MR ...
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Glioma Grading: Sensitivity, Specificity, and Predictive Values of Perfusion MR Imaging and Proton MR Spectroscopic Imaging Compared with Conventional MR Imaging
... Multivoxel 2D proton chemical shift imaging (CSI) or spec- troscopic imaging was performed after administration of gado- pentetate dimeglumine. This is the standard protocol at our institution, as the ...
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Neuroimaging in Pediatric Brain Tumors: Gd DTPA–enhanced, Hemodynamic, and Diffusion MR Imaging Compared with MR Spectroscopic Imaging
... 3). MR spectroscopic imaging revealed at least one spectrum with high Cho levels in nonenhancing regions that were neighboring or outside the Gd-DTPA–en- hanced tumor bed in 15 patients with ...
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Reproducibility of proton MR spectroscopic imaging findings
... proton MR spectroscopic imaging in healthy ...proton MR spectroscopic ...proton MR spec- troscopic imaging permits simultaneous acquisition of N-acetylaspartate (NAA), ...
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Regional Differences and Metabolic Changes in Normal Aging of the Human Brain: Proton MR Spectroscopic Imaging Study
... (2% per decade) (5–8). T2-weighted MR images have also shown the presence of characteristic white matter hyperintensities in the elderly (9). Al- though these anatomic and radiographic features are often ...
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Metabolic Abnormalities in the Hippocampus of Patients with Schizophrenia: A 3D Multivoxel MR Spectroscopic Imaging Study at 3T
... Disclosures: Emma J. Meyer—RELATED: National Institutes of Health.* Ivan I. Kirov— UNRELATED: Travel/Accommodations/Meeting Expenses Unrelated to Activities Listed: North American Brain Injury Society, Comments: for ...
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Effects of a Phonologically Driven Treatment for Dyslexia on Lactate Levels Measured by Proton MR Spectroscopic Imaging
... a dyslexic participant before and after treatment in the left anterior brain region during the phonologic task. Figure 3 shows an example of spectra from a dyslexic boy during the phonologic task and in- creased lactate ...
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Preoperative Proton MR Spectroscopic Imaging of Brain Tumors: Correlation with Histopathologic Analysis of Resection Specimens
... RESULTS: All mass lesions studied, whether attributable to tumor or noncancerous effects of previous therapy, showed abnormal MR spectra compared with normal parenchyma. When the pattern of MRS metabolites ...
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Proton MR Spectroscopic Imaging Depicts Diffuse Axonal Injury in Children with Traumatic Brain Injury
... 2D MRSI was performed with a water-suppressed point- resolved spectroscopic sequence with a TR/TE of 3000/144. The multivoxel acquisition was acquired by using a 10-mm- thick section through the level of the CC ...
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Classification of Childhood White Matter Disorders Using Proton MR Spectroscopic Imaging
... efaction and cystic degeneration in LVWM, cavity formation in specific phenotypic expressions of mitochondrial disorders, or myelin vacuolation in MLC. In this study, therefore, the use of the term “rarefaction” was to ...
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Proton MR Spectroscopic Imaging in Pelizaeus Merzbacher Disease
... of MR spectroscopy (MRS) and MRS imaging may be po- tentially useful in evaluating both axonal integrity (on the basis of N-acetylaspartate [NAA] levels) (7) and myelination (related to the signal intensity ...
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Reproducibility of Proton MR Spectroscopic Imaging (PEPSI): Comparison of Dyslexic and Normal Reading Children and Effects of Treatment on Brain Lactate Levels during Language Tasks
... Functional MR imaging (fMRI) has been established as an ef- fective tool to measure brain activation on the basis of blood oxygenation level dependent (BOLD) contrast mechanisms during language processing ...
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Changes in Fiber Integrity, Diffusivity, and Metabolism of the Pyramidal Tract Adjacent to Gliomas: A Quantitative Diffusion Tensor Fiber Tracking and MR Spectroscopic Imaging Study
... In 18 of 20 patients of this study, the ipsilateral pyramidal tract was located outside of the peritumoral edema visible on conventional MR images (ie, in peritumoral normal-appear- ing WM). However, the ...
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Diffuse Metabolic Abnormalities in Reversible Posterior Leukoencephalopathy Syndrome
... T2-weighted MR images showed bilateral parieto- occipital signal hyperintensity (Fig 2A) involving both white and gray ...1, MR spectroscopic imaging showed globally reduced ratios of ...
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MR Imaging and Proton MR Spectroscopic Studies in Sjögren Larsson Syndrome: Characterization of the Leukoencephalopathy
... proton MR spectra were acquired by using the stimulated-echo acquisition mode (STEAM) technique (TR/ mixing time/TE ⫽ 3000/30/20 or 30, NEX ⫽ 64) ...rieto-occipital). MR spectroscopic imaging ...
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