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Diffusion Tensor MRI

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https://www.readbyqxmd.com/read/28799142/what-to-do-in-failed-hemispherotomy-our-clinical-series-and-review-of-the-literature
#1
REVIEW
Andrea Bartoli, Y El Hassani, B Jenny, S Momjian, C M Korff, M Seeck, S Vulliemoz, K Schaller
Hemispherotomy is an established surgical technique to cure or palliate selected, mostly young patients suffering from refractory epilepsy. However, a few patients continue to have seizures despite the surgical hemispherical disconnection. We present a case series of patients who underwent redo hemispherotomy after a first unsuccessful hemispherical disconnection and provide a roadmap for subsequent workup and treatment. The institutional database of epilepsy surgery was reviewed. Twenty-four patients who underwent hemispherotomies for refractory epilepsy were identified between 2007 and 2016...
August 10, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28797663/improvement-of-olfactory-function-after-sinus-surgery-correlates-with-white-matter-properties-measured-by-diffusion-tensor-imaging
#2
Daniel Güllmar, Tabea Seeliger, Hilmar Gudziol, Ulf K M Teichgräber, Jürgen R Reichenbach, Orlando Guntinas-Lichius, Thomas Bitter
Impaired olfaction is associated with a volume decrease in the olfactory bulb as well as in the gray matter of cortical olfactory areas. On the other hand, restitution of an impaired olfaction results in a regain of volume in these regions. Studies investigating similar changes in the cerebral white matter are virtually not existent. The aim of this prospective study therefore was to investigate cerebral white matter using magnetic resonance diffusion tensor imaging (DTI). 31 patients (54±13years) with olfactory impairment (chronic rhinosinusitis) and planned functional endoscopic sinus surgery (FESS) were included...
August 7, 2017: Neuroscience
https://www.readbyqxmd.com/read/28796115/cerebral-white-matter-structure-is-disrupted-in-gulf-war-veterans-with-chronic-musculoskeletal-pain
#3
Stephanie M VanRiper, Andrew L Alexander, Kelli F Koltyn, Aaron J Stegner, Laura D Ellingson, Daniel J Destiche, Ryan J Dougherty, Jacob B Lindheimer, Dane B Cook
Chronic musculoskeletal pain (CMP) affects ∼25% of the 700,000 Veterans deployed during the Persian Gulf War (1990-91). The cause of their pain is unknown and there are no efficacious treatments. A small body of literature suggests that brain abnormalities exist in Gulf War Veterans (GVs), yet relationships between brain abnormalities and disease symptoms remain largely unexplored. Our purpose was to compare white matter (WM) integrity between GVCMP and matched, healthy Veteran controls (GVCO) and investigate relationships between cerebral WM integrity and symptoms...
August 8, 2017: Pain
https://www.readbyqxmd.com/read/28796033/rtms-treatments-combined-with-speech-training-for-a-conduction-aphasia-patient-a-case-report-with-mri-study
#4
Hui Zhang, Ying Chen, Ruiping Hu, Liqing Yang, Mengxing Wang, Jilei Zhang, Haifeng Lu, Yi Wu, Xiaoxia Du
RATIONALE: To date, little is known regarding the neural mechanisms of the functional recovery of language after repetitive transcranial magnetic stimulation (rTMS) in aphasia. Our aim was to investigate the mechanism that underlies rTMS and speech training in a case report. PATIENT CONCERNS AND DIAGNOSES: We report the case of a 39-year-old woman who was initially diagnosed with conduction aphasia following a left hemisphere stroke. INTERVENTIONS: The rTMS location comprised the left Broca area, and a frequency of 5 Hz for 20 min/d for 10 days during a 2-week period was used...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28794983/multimodal-structural-mri-in-the-diagnosis-of-motor-neuron-diseases
#5
Pilar M Ferraro, Federica Agosta, Nilo Riva, Massimiliano Copetti, Edoardo Gioele Spinelli, Yuri Falzone, Gianni Sorarù, Giancarlo Comi, Adriano Chiò, Massimo Filippi
This prospective study developed an MRI-based method for identification of individual motor neuron disease (MND) patients and test its accuracy at the individual patient level in an independent sample compared with mimic disorders. 123 patients with amyotrophic lateral sclerosis (ALS), 44 patients with predominantly upper motor neuron disease (PUMN), 20 patients with ALS-mimic disorders, and 78 healthy controls were studied. The diagnostic accuracy of precentral cortical thickness and diffusion tensor (DT) MRI metrics of corticospinal and motor callosal tracts were assessed in a training cohort and externally proved in a validation cohort using a random forest analysis...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28781902/study-on-lesion-assessment-of-cerebello-thalamo-cortical-network-in-wilson-s-disease-with-diffusion-tensor-imaging
#6
Anqin Wang, Hongli Wu, Chunsheng Xu, Lanfeng Tang, Jaeyoun Lee, Min Wang, Man Jiang, Chuanfu Li, Qi Lu, Chunyun Zhang
Wilson's disease (WD) is a genetic disorder of copper metabolism with pathological copper accumulation in the brain and any other tissues. This article aimed to assess lesions in cerebello-thalamo-cortical network with an advanced technique of diffusion tensor imaging (DTI) in WD. 35 WD patients and 30 age- and sex-matched healthy volunteers were recruited to accept diffusion-weighted images with 15 gradient vectors and conventional magnetic resonance imaging (MRI). The DTI parameters, including fractional anisotropy (FA) and mean diffusion (MD), were calculated by diffusion kurtosis estimator software...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28780827/-imaging-diagnosis-of-95-cases-of-moderate-and-severe-acute-carbon-monoxide-poisoning
#7
N N Hao, C Tian, K X Lian, T Han, S Jin
Objective: To explore the difference of radiological imaging features of delayed encephalopathy after carbon monoxide poisoning (DECMP) and acute carbon monoxide poisoning (ACMP) , and the correlation between the imaging findings and clinical prognosis of the disease. Methods: The correlation between imaging findings and clinical manifestations and prognosis of 95 patients with moderate and severe acute carbon monoxide poisoning were retrospectively analyzed. In the above 95 cases, there were 62 cases of ACMP and 33 cases of DEACMP...
June 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28780181/white-matter-tract-alterations-in-parkinson-s-disease-patients-with-punding
#8
Elisa Canu, Federica Agosta, Vladana Markovic, Igor Petrovic, Iva Stankovic, Francesca Imperiale, Tanja Stojkovic, Massimiliano Copetti, Vladimir S Kostic, Massimo Filippi
OBJECTIVE: To assess brain white matter tract alterations in patients with Parkinson's disease and punding (PD-punding) compared with controls and PD cases without any impulsive-compulsive behaviour. METHODS: Forty-nine PD patients (21 PD-punding and 28 PD with no impulsive-compulsive behaviours) and 28 controls were consecutively recruited. Clinical, cognitive and psychopathological evaluations were performed. Diffusion tensor MRI metrics of the main white matter tracts were assessed using a tractography approach...
July 27, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28774682/methods-for-molecular-imaging-of-brain-tumours-in-a-hybrid-mr-pet-context-water-content-t2%C3%A2-diffusion-indices-and-fet-pet
#9
A M Oros-Peusquens, R Loução, M Zimmermann, K-J Langen, N J Shah
The aim of this study is to present and evaluate a multiparametric and multi-modality imaging protocol applied to brain tumours and investigate correlations between these different imaging measures (R1.1). In particular, we describe a method for rapid, non-invasive, quantitative imaging of water content of brain tissue, based on a single multiple-echo gradient-echo (mGRE) acquisition. We include in the processing a method for noise reduction of the multi-contrast data based on Principal Component Analysis (PCA)...
July 31, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28774363/-quantitative-evaluation-of-white-matter-development-in-fetus-with-growth-restriction-by-diffusion-tensor-imaging
#10
Hua-Wei Wang, Bing Wu, Jing Liu, Fang Liu, Xin-Huai Wu, Ming-Mei Ge
OBJECTIVE: To investigate whether fetal growth restriction (FGR) has an adverse effect on white matter development. METHODS: A total of 28 full-term small for gestational age (SGA) infants were enrolled as study subjects and 15 full-term appropriate for gestational age infants were enrolled as control group. Conventional head magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) were performed for all infants. The white matter was divided into 122 regions...
August 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28767360/software-toolbox-for-low-frequency-conductivity-and-current-density-imaging-using-mri
#11
Saurav Z K Sajib, Nitish Katoch, Hyung Joong Kim, Oh In Kwon, Eung Je Woo
OBJECTIVE: Low-frequency conductivity and current density imaging using MRI includes magnetic resonance electrical impedance tomography (MREIT), diffusion tensor MREIT (DT-MREIT), conductivity tensor imaging (CTI), and magnetic resonance current density imaging (MRCDI). MRCDI and MREIT provide current density and isotropic conductivity images, respectively, using current-injection phase MRI techniques. DT-MREIT produces anisotropic conductivity tensor images by incorporating diffusion weighted MRI into MREIT...
July 27, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28765809/diffusion-tensor-imaging-in-parkinson-s-disease-review-and-meta-analysis
#12
REVIEW
Cyril Atkinson-Clement, Serge Pinto, Alexandre Eusebio, Olivier Coulon
BACKGROUND: Neuroimaging studies help us better understand the pathophysiology and symptoms of Parkinson's disease (PD). In several of these studies, diffusion tensor imaging (DTI) was used to investigate structural changes in cerebral tissue. Although data have been provided as regards to specific brain areas, a whole brain meta-analysis is still missing. METHODS: We compiled 39 studies in this meta-analysis: 14 used fractional anisotropy (FA), 1 used mean diffusivity (MD), and 24 used both indicators...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28764771/sensitivity-of-restriction-spectrum-imaging-to-memory-and-neuropathology-in-alzheimer-s-disease
#13
Emilie T Reas, Donald J Hagler, Nathan S White, Joshua M Kuperman, Hauke Bartsch, Karalani Cross, Richard Q Loi, Akshara R Balachandra, M J Meloy, Christina E Wierenga, Douglas Galasko, James B Brewer, Anders M Dale, Linda K McEvoy
BACKGROUND: Diffusion imaging has demonstrated sensitivity to structural brain changes in Alzheimer's disease (AD). However, there remains a need for a more complete characterization of microstructural alterations occurring at the earliest disease stages, and how these changes relate to underlying neuropathology. This study evaluated the sensitivity of restriction spectrum imaging (RSI), an advanced diffusion magnetic resonance imaging (MRI) technique, to microstructural brain changes in mild cognitive impairment (MCI) and AD...
August 2, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28756927/the-relationship-between-fractional-anisotropy-value-and-tumor-microarchitecture-in-late-stage-rat-glioma
#14
Xiang-Ying Li, Jian-Qiang Chen, Yi-Kai Xu, Xiang-Jun Han
OBJECTIVE: To explore the magnetic resonance diffusion tensor imaging (MR-DTI) features of in the late stage of Wistar rat C6 brain glioma, and the relationship between fractional anisotropy value and tumor microarchitecture. METHODS: The concentration of more than 1.0 × 10(6)/10 μL glioma cells and complete medium were injected stereotactically into the right caudate nucleus of the experimental group (n = 35) and control group (n = 10), respectively. Conventional MRI, DTI, and enhanced T1WI scans were Performed using the GE Signa HD × 3...
June 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28755401/association-between-the-scores-of-the-japanese-version-of-the-brief-assessment-of-cognition-in-schizophrenia-and-whole-brain-structure-in-patients-with-chronic-schizophrenia-a-voxel-based-morphometry-and-diffusion-tensor-imaging-study
#15
Shinsuke Hidese, Miho Ota, Junko Matsuo, Ikki Ishida, Moeko Hiraishi, Toshiya Teraishi, Kotaro Hattori, Hiroshi Kunugi
AIM: The brief assessment of cognition in schizophrenia (BACS) is a concise tool designed to evaluate cognitive deficits in schizophrenia. We examined the possible association between BACS scores and whole-brain structure, as observed using magnetic resonance imaging (MRI) with a relatively large sample. METHODS: The study sample comprised 116 patients with schizophrenia (mean age, 39.3 ± 11.1 years; 66 men) and 118 healthy controls (40.0 ± 13.6; 58 men) who completed the Japanese version of the BACS (BACS-J)...
July 29, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28744069/alteration-in-the-number-and-integrity-of-white-matter-tracts-in-the-preterm-a-quantitative-diffusion-tensor-imaging-and-diffusion-fibre-tractography-in-children
#16
Ruma M Sreedharan, Subramonium Aiyappan, N Roy
PURPOSE: Periventricular white matter is most commonly injured in preterm babies with hypoxia. To assess white matter damage, we decided to perform diffusion tensor imaging (DTI) in preterm children with history of hypoxia and magnetic resonance imaging (MRI) features of periventricular leukomalacia (PVL) (PTH). We hypothesized that the PTH have reduced number of white matter fibres compared to age matched pre term children without hypoxia (PTHO), and also depending on the severity of PVL, there could be reduction in the number of fibres as well...
April 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28736471/comparison-of-multi-fiber-reproducibility-of-pas-mri-and-q-ball-with-empirical-multiple-b-value-hardi
#17
Vishwesh Nath, Kurt G Schilling, Justin A Blaber, Zhaohua Ding, Adam W Anderson, Bennett A Landman
Crossing fibers are prevalent in human brains and a subject of intense interest for neuroscience. Diffusion tensor imaging (DTI) can resolve tissue orientation but is blind to crossing fibers. Many advanced diffusion-weighted magnetic resolution imaging (MRI) approaches have been presented to extract crossing-fibers from high angular resolution diffusion imaging (HARDI), but the relative sensitivity and specificity of approaches remains unclear. Here, we examine two leading approaches (PAS and q-ball) in the context of a large-scale, single subject reproducibility study...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28735913/gray-matter-abnormalities-of-the-dorsal-posterior-cingulate-in-sleep-walking
#18
Anna Heidbreder, Ambra Stefani, Elisabeth Brandauer, Ruth Steiger, Christian Kremser, Elke R Gizewski, Peter Young, Werner Poewe, Birgit Högl, Christoph Scherfler
OBJECTIVE: This study aimed to determine whether voxel-based analysis of T1 weighted magnetic resonance imaging (MRI) and diffusion tensor imaging is able to detect alterations of gray and white matter morphometry as well as measures of mean diffusivity and fractional anisotropy in patients with non-rapid eye movement parasomnia. METHODS: 3 Tesla MRI was performed in 14 drug-free, polysomnography-confirmed adult patients with non-rapid eye movement parasomnia (age: 29 ± 4...
August 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28730720/microstructural-white-matter-brain-abnormalities-in-patients-with-idiopathic-fecal-incontinence
#19
J Muthulingam, S Haas, T M Hansen, S Laurberg, L Lundby, H S Jørgensen, A M Drewes, K Krogh, J B Frøkjaer
BACKGROUND: Abnormal central nervous system processing of visceral sensation may be a part of the pathogenesis behind idiopathic fecal incontinence (IFI). Our aim was to characterize brain differences in patients with IFI and healthy controls by means of structural magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI). METHODS: In 21 female patients with IFI and 15 female healthy controls, whole-brain structural differences in gray matter volume (GMV), cortical thickness, and white matter tracts fractional anisotropy (FA) were quantified...
July 21, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28729936/are-there-differences-in-brain-morphology-according-to-handedness
#20
Han Jang, Jae Youn Lee, Kang Il Lee, Kang Min Park
OBJECTIVE: This study aimed to investigate the differences in brain morphology according to handedness. MATERIALS AND METHODS: Forty-two healthy subjects were enrolled (21 right-handers and 21 nonright-handers). The two groups were classified according to the Edinburgh Handedness Inventory. Measures of cortical morphology, such as thickness, surface area, volume, and curvature, and the volumes of subcortical structures, such as the amygdala, caudate, hippocampus, globus pallidus, putamen, and thalamus, were compared between the groups according to handedness using whole-brain 3D T1-weighted MRI...
July 2017: Brain and Behavior
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