Search results for "brain MRI"

showing 5 items of 5 documents

Noise Filtering Using Edge-Driven Adaptive Anisotropic Diffusion

2008

This paper presents a method aimed to noise removal in MRI (Magnetic Resonance Imaging). We propose an improvement of Perona and Malik's anisotropic diffusion filter. In our schema, the diffusion equation of the filter has been modified to take into account the edges direction, This allows the filter to blur uniform areas, while it better preserves the edges. Both quantitative and qualitative evaluation is presented and the results are compared with other methods.

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniNoise Removal Magnetic Resonance Images Anisotropic Diffusion Brain MRIDiffusion equationNoise measurementComputer scienceAnisotropic diffusionWiener filterComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONFilter (signal processing)Edge-preserving smoothingMagnetic fieldAdaptive filtersymbols.namesakeComputer Science::Computer Vision and Pattern RecognitionsymbolsAlgorithm2008 21st IEEE International Symposium on Computer-Based Medical Systems
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Neurochemical correlates of brain atrophy in fibromyalgia syndrome: a magnetic resonance spectroscopy and cortical thickness study

2020

(1) Background: Recently, a series of clinical neuroimaging studies on fibromyalgia (FM) have shown a reduction in cortical volume and abnormally high glutamate (Glu) and glutamate + glutamine (Glx) levels in regions associated with pain modulation. However, it remains unclear whether the volumetric decreases and increased Glu levels in FM are related each other. We hypothesized that higher Glu levels are related to decreases in cortical thickness (CT) and volume in FM patients. (2) Methods: Twelve females with FM and 12 matched healthy controls participated in a session of combined 3.0 Tesla structural magnetic resonance imaging (MRI) and single-voxel MR spectroscopy focused on the thalami…

In vivo magnetic resonance spectroscopymedicine.medical_specialtybrain MRIArticlelcsh:RC321-57103 medical and health sciences0302 clinical medicineNeurochemicalAtrophyNeuroimagingGyrusFibromyalgiaInternal medicinemedicinecortical thicknelcsh:Neurosciences. Biological psychiatry. Neuropsychiatry030304 developmental biology0303 health sciencesbusiness.industryGeneral NeuroscienceMR spectroscopyGlutamate receptorSettore MED/37 - Neuroradiologiacortical thicknessmedicine.diseaseSubcortical gray matterEndocrinologymedicine.anatomical_structurefibromyalgia; glutamate excitotoxicity; cortical thickness; brain MRI; chronic pain; MR spectroscopyMR spectroscopy; brain MRI; chronic pain; cortical thickness; fibromyalgia; glutamate excitotoxicity.fibromyalgiaSettore MED/36 - Diagnostica Per Immagini E Radioterapiabusinesschronic pain030217 neurology & neurosurgeryglutamate excitotoxicity
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Brain MRI patterns in MPS IIIB (Sanfilippo syndrome type B): A longitudinal study

2016

0301 basic medicinePathologymedicine.medical_specialtyLongitudinal studybusiness.industryEndocrinology Diabetes and Metabolism030105 genetics & hereditymedicine.diseaseBiochemistry03 medical and health sciences0302 clinical medicineEndocrinologyGeneticsBrain mrimedicinebusinessMolecular Biology030217 neurology & neurosurgerySanfilippo syndromeMolecular Genetics and Metabolism
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A multicenter measurement of magnetization transfer ratio in normal white matter

1999

To assess the importance of intercenter variations when measuring magnetization transfer ratio (MTR) in the brain, six European centers measured MTR in normal white matter. MTR ranged from 9 to 51 percent units (25 sequences). The effective flip angle of the saturating pulse divided by the pulse repetition time (ENRsat degrees/msec) was a good predictor of MTR (MTR = 3.25 ENRsat).

PhysicsDrug trialMagnetization Transfer MRIbusiness.industryWhite mattermedicine.anatomical_structureRepetition TimeFlip anglemedicineBrain mriRadiology Nuclear Medicine and imagingMagnetization transferNuclear medicinebusinessJournal of Magnetic Resonance Imaging
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Red Ear Syndrome and Migraine: Report of Eight Cases

2002

We describe eight idiopathic cases of red ear syndrome in seven children and one adult. All were migraineurs with a history of paroxysmally painful and red ear, unilateral or alternating, in isolation or associated with migraine attacks. The reported duration of these episodes varied from 30 minutes to 1 hour. Neurologic examination, brain MRI and CT scans, and x-rays of the cervical spine were normal. The close temporal relationship between the "red ear episodes" and migraine attacks suggests an association between the two conditions.

AdultMalemedicine.medical_specialtyAdolescentMigraine DisordersPainCentral nervous system diseaseBrain mrimedicineHumansred ear syndrome migraineChildEar DiseasesNervus TrigeminusVascular diseaseRed ear syndromebusiness.industrySyndromemedicine.diseaseCervical spineSurgeryNeurologyMigraineEl NiñoChild PreschoolAnesthesiaSettore MED/26 - NeurologiaFemaleNeurology (clinical)businessHeadache: The Journal of Head and Face Pain
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