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Brain surface mri

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https://www.readbyqxmd.com/read/29429985/posterior-associative-and-cingulate-cortex-involvement-of-brain-single-photon-emission-computed-tomography-spect-imaging-in-semantic-dementia-with-probable-alzheimer-disease-pathology-a-case-report
#1
Yumi Takano, Keiko Kunitoki, Yasuko Tatewaki, Tatsushi Mutoh, Tomoko Totsune, Hideo Shimomura, Manabu Nakagawa, Hiroyuki Arai, Yasuyuki Taki
BACKGROUND Semantic dementia (SD) is a type of primary progressive aphasia with prominent language dysfunction, mostly within the spectrum of frontotemporal lobar degeneration (FTLD). Although there is an overlap in clinical manifestations of SD attributable to FTLD and neuropathologically proven Alzheimer disease (AD), clinical diagnostic clues are not readily available. We present a characteristic finding based on a single-photon emission computed tomography (SPECT)-based regional cerebral blood flow study and its statistical imaging analysis for a rare case of SD with AD-like pathology...
February 12, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29420697/environmental-influences-on-infant-cortical-thickness-and-surface-area
#2
Shaili C Jha, Kai Xia, Mihye Ahn, Jessica B Girault, Gang Li, Li Wang, Dinggang Shen, Fei Zou, Hongtu Zhu, Martin Styner, John H Gilmore, Rebecca C Knickmeyer
Cortical thickness (CT) and surface area (SA) vary widely between individuals and are associated with intellectual ability and risk for various psychiatric and neurodevelopmental conditions. Factors influencing this variability remain poorly understood, but the radial unit hypothesis, as well as the more recent supragranular cortex expansion hypothesis, suggests that prenatal and perinatal influences may be particularly important. In this report, we examine the impact of 17 major demographic and obstetric history variables on interindividual variation in CT and SA in a unique sample of 805 neonates who received MRI scans of the brain around 2 weeks of age...
February 6, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29409960/the-developing-human-connectome-project-a-minimal-processing-pipeline-for-neonatal-cortical-surface-reconstruction
#3
Antonios Makropoulos, Emma C Robinson, Andreas Schuh, Robert Wright, Sean Fitzgibbon, Jelena Bozek, Serena J Counsell, Johannes Steinweg, Katy Vecchiato, Jonathan Passerat-Palmbach, Gregor Lenz, Filippo Mortari, Tencho Tenev, Eugene P Duff, Matteo Bastiani, Lucilio Cordero-Grande, Emer Hughes, Nora Tusor, Jacques-Donald Tournier, Jana Hutter, Anthony N Price, Rui Pedro A G Teixeira, Maria Murgasova, Suresh Victor, Christopher Kelly, Mary A Rutherford, Stephen M Smith, A David Edwards, Joseph V Hajnal, Mark Jenkinson, Daniel Rueckert
The Developing Human Connectome Project (dHCP) seeks to create the first 4-dimensional connectome of early life. Understanding this connectome in detail may provide insights into normal as well as abnormal patterns of brain development. Following established best practices adopted by the WU-MINN Human Connectome Project (HCP), and pioneered by FreeSurfer, the project utilises cortical surface-based processing pipelines. In this paper, we propose a fully automated processing pipeline for the structural Magnetic Resonance Imaging (MRI) of the developing neonatal brain...
January 30, 2018: NeuroImage
https://www.readbyqxmd.com/read/29405980/multiscale-nuclear-magnetic-relaxation-dispersion-of-complex-liquids-in-bulk-and-confinement
#4
REVIEW
Jean-Pierre Korb
The nuclear magnetic relaxation dispersion (NMRD) technique consists of measurement of the magnetic-field dependence of the longitudinal nuclear-spin-lattice relaxation rate 1/T1. Usually, the acquisition of the NMRD profiles is made using a fast field cycling (FFC) NMR technique that varies the magnetic field and explores a very large range of Larmor frequencies (10 kHz < ω0/(2π) <40 MHz). This allows extensive explorations of the fluctuations to which nuclear spin relaxation is sensitive...
February 2018: Progress in Nuclear Magnetic Resonance Spectroscopy
https://www.readbyqxmd.com/read/29403349/group-analysis-in-mne-python-of-evoked-responses-from-a-tactile-stimulation-paradigm-a-pipeline-for-reproducibility-at-every-step-of-processing-going-from-individual-sensor-space-representations-to-an-across-group-source-space-representation
#5
Lau M Andersen
An important aim of an analysis pipeline for magnetoencephalographic data is that it allows for the researcher spending maximal effort on making the statistical comparisons that will answer the questions of the researcher, while in turn spending minimal effort on the intricacies and machinery of the pipeline. I here present a set of functions and scripts that allow for setting up a clear, reproducible structure for separating raw and processed data into folders and files such that minimal effort can be spend on: (1) double-checking that the right input goes into the right functions; (2) making sure that output and intermediate steps can be accessed meaningfully; (3) applying operations efficiently across groups of subjects; (4) re-processing data if changes to any intermediate step are desirable...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29400417/brain-structure-differences-between-chinese-and-caucasian-cohorts-a-comprehensive-morphometry-study
#6
Yuchun Tang, Lu Zhao, Yunxia Lou, Yonggang Shi, Rui Fang, Xiangtao Lin, Shuwei Liu, Arthur Toga
Numerous behavioral observations and brain function studies have demonstrated that neurological differences exist between East Asians and Westerners. However, the extent to which these factors relate to differences in brain structure is still not clear. As the basis of brain functions, the anatomical differences in brain structure play a primary and critical role in the origination of functional and behavior differences. To investigate the underlying differences in brain structure between the two cultural/ethnic groups, we conducted a comparative study on education-matched right-handed young male adults (age = 22-29 years) from two cohorts, Han Chinese (n = 45) and Caucasians (n = 45), using high-dimensional structural magnetic resonance imaging (MRI) data...
February 5, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29398129/biophysical-modeling-of-in%C3%A2-vivo-glioma-response-after-whole-brain-radiation-therapy-in-a-murine-model-of-brain-cancer
#7
David A Hormuth, Jared A Weis, Stephanie L Barnes, Michael I Miga, Vito Quaranta, Thomas E Yankeelov
PURPOSE: To develop and investigate a set of biophysical models based on a mechanically coupled reaction-diffusion model of the spatiotemporal evolution of tumor growth after radiation therapy. METHODS AND MATERIALS: Post-radiation therapy response is modeled using a cell death model (Md), a reduced proliferation rate model (Mp), and cell death and reduced proliferation model (Mdp). To evaluate each model, rats (n = 12) with C6 gliomas were imaged with diffusion-weighted magnetic resonance imaging (MRI) and contrast-enhanced MRI at 7 time points over 2 weeks...
December 13, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29388807/spectrum-of-mri-brain-lesion-patterns-in-neuromyelitis-optica-spectrum-disorder-a-pictorial-review
#8
Kevin Y Wang, Justin A Chetta, Pavit Bains, Anthony Balzer, John A Lincoln, Tomas Uribe, Christie M Lincoln
Neuromyelitis optica is a neurotropic autoimmune inflammatory disease of the central nervous system traditionally thought to exclusively involve the optic nerves and spinal cord. With the discovery of the disease-specific aquaporin-4 antibody and the increasing recognition of clinical and characteristic imaging patterns of brain involvement in what is now termed neuromyelitis optica spectrum disorder (NMOSD), magnetic resonance imaging now plays a greater role in diagnosis of NMOSD based on the 2015 consensus criteria and in distinguishing it from other inflammatory disorders, particularly multiple sclerosis...
February 1, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29377733/cortical-abnormalities-associated-with-pediatric-and-adult-obsessive-compulsive-disorder-findings-from-the-enigma-obsessive-compulsive-disorder-working-group
#9
Premika S W Boedhoe, Lianne Schmaal, Yoshinari Abe, Pino Alonso, Stephanie H Ameis, Alan Anticevic, Paul D Arnold, Marcelo C Batistuzzo, Francesco Benedetti, Jan C Beucke, Irene Bollettini, Anushree Bose, Silvia Brem, Anna Calvo, Rosa Calvo, Yuqi Cheng, Kang Ik K Cho, Valentina Ciullo, Sara Dallaspezia, Damiaan Denys, Jamie D Feusner, Kate D Fitzgerald, Jean-Paul Fouche, Egill A Fridgeirsson, Patricia Gruner, Gregory L Hanna, Derrek P Hibar, Marcelo Q Hoexter, Hao Hu, Chaim Huyser, Neda Jahanshad, Anthony James, Norbert Kathmann, Christian Kaufmann, Kathrin Koch, Jun Soo Kwon, Luisa Lazaro, Christine Lochner, Rachel Marsh, Ignacio Martínez-Zalacaín, David Mataix-Cols, José M Menchón, Luciano Minuzzi, Astrid Morer, Takashi Nakamae, Tomohiro Nakao, Janardhanan C Narayanaswamy, Seiji Nishida, Erika Nurmi, Joseph O'Neill, John Piacentini, Fabrizio Piras, Federica Piras, Y C Janardhan Reddy, Tim J Reess, Yuki Sakai, Joao R Sato, H Blair Simpson, Noam Soreni, Carles Soriano-Mas, Gianfranco Spalletta, Michael C Stevens, Philip R Szeszko, David F Tolin, Guido A van Wingen, Ganesan Venkatasubramanian, Susanne Walitza, Zhen Wang, Je-Yeon Yun, Paul M Thompson, Dan J Stein, Odile A van den Heuvel
OBJECTIVE: Brain imaging studies of structural abnormalities in OCD have yielded inconsistent results, partly because of limited statistical power, clinical heterogeneity, and methodological differences. The authors conducted meta- and mega-analyses comprising the largest study of cortical morphometry in OCD ever undertaken. METHOD: T1-weighted MRI scans of 1,905 OCD patients and 1,760 healthy controls from 27 sites worldwide were processed locally using FreeSurfer to assess cortical thickness and surface area...
December 15, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/29373710/smart-glasses-for-neurosurgical-navigation-by-augmented-reality
#10
Keisuke Maruyama, Eiju Watanabe, Taichi Kin, Kuniaki Saito, Atsushi Kumakiri, Akio Noguchi, Motoo Nagane, Yoshiaki Shiokawa
BACKGROUND: Wearable devices with heads-up displays or smart glasses can overlay images onto the sight of the wearer. This technology has never been applied to surgical navigation. OBJECTIVE: To assess the applicability and accuracy of smart glasses for augmented reality (AR)-based neurosurgical navigation. METHODS: Smart glasses were applied to AR-based neurosurgical navigation. Three-dimensional computer graphics were created based on preoperative magnetic resonance images and visualized in see-through smart glasses...
January 24, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29361626/-secondary-dementia-due-to-leptomeningeal-metastasis-of-breast-cancer-improved-by-whole-brain-radiation
#11
Mariko Asai, Hiroshi Tanaka, Yasutomo Goto, Tetsuya Yamada, Norihiro Yuasa, Eiji Takeuchi, Hideo Miyake, Hidemasa Nagai, Yuichiro Yoshioka, Masataka Okuno, Natsuko Kawai, Takayuki Minami, Takuya Nagao, Shingo Maeda, Koichi Mouri, Kouji Fukata, Hironori Mizuno, Takuji Iwase, Kanji Miyata
A 62-year-old woman received chemotherapy for breast cancer with bone metastasis and malignant pleural and pericardial effusion. She was examined by imaging for progressive cognitive impairment and headache. Enhanced MRI findings showed multiple solid tumors on brain surface, and brain perfusion scintigraphy showed blood flow decrease in both parietal lobes. She was diagnosed with secondary dementia due to leptomeningeal metastases of breast cancer, and whole brain external irradiation was performed(30 Gy/15 Fr)...
December 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29355768/idiosyncratic-organization-of-cortical-networks-in-autism-spectrum-disorder
#12
REVIEW
Adonay S Nunes, Nicholas Peatfield, Vasily Vakorin, Sam M Doesburg
Neuroimaging studies of Autism Spectrum Disorder (ASD) have yielded inconsistent results indicating either increases or decreases in functional connectivity, or both. Recent findings suggest that these seemingly divergent results might be underpinned by greater inter-individual variability in brain network connectivity in ASD. We tested the hypothesis that the spatial patterns of intrinsic connectivity networks (ICNs) are more idiosyncratic in ASD, and demonstrated that this increased variability is associated with symptomatology...
January 17, 2018: NeuroImage
https://www.readbyqxmd.com/read/29343657/combining-segmented-grey-and-white-matter-images-improves-voxel-based-morphometry-for-the-case-of-dilated-lateral-ventricles
#13
Masami Goto, Osamu Abe, Shigeki Aoki, Koji Kamagata, Masaaki Hori, Tosiaki Miyati, Tsutomu Gomi, Tohoru Takeda
PURPOSE: To evaluate the error in segmented tissue images and to show the usefulness of the brain image in voxel-based morphometry (VBM) using Statistical Parametric Mapping (SPM) 12 software and 3D T1-weighted magnetic resonance images (3D-T1WIs) processed to simulate idiopathic normal pressure hydrocephalus (iNPH). MATERIALS AND METHODS: VBM analysis was performed on sagittal 3D-T1WIs obtained in 22 healthy volunteers using a 1.5T MR scanner. Regions of interest for the lateral ventricles of all subjects were carefully outlined on the original 3D-T1WIs, and two types of simulated 3D-T1WI were also prepared (non-dilated 3D-T1WI as normal control and dilated 3D-T1WI to simulate iNPH)...
January 18, 2018: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/29313947/personality-traits-are-associated-with-cortical-development-across-adolescence-a-longitudinal-structural-mri-study
#14
Lia Ferschmann, Anders M Fjell, Margarete E Vollrath, Håkon Grydeland, Kristine B Walhovd, Christian K Tamnes
How personality traits relate to structural brain changes in development is an important but understudied question. In this study, cortical thickness (CT) and surface area (SA), estimated using magnetic resonance imaging (MRI), were investigated in 99 participants aged 8-19 years. Follow-up MRI data were collected after on average 2.6 years for 74 individuals. The Big Five personality traits were related to longitudinal regional CT or SA development, but limited cross-sectional relations were observed. Conscientiousness, emotional stability, and imagination were associated with more age-expected cortical thinning over time...
January 4, 2018: Child Development
https://www.readbyqxmd.com/read/29301597/surface-based-morphometry-of-human-brain-intra-individual-comparison-between-3t-and-7t-high-resolution-structural-mr-imaging
#15
Zhiye Chen, Meng-Qi Liu, Lin Ma
ObjectiveHigh resolution structural MR imaging can reveal structural characteristics of cerebral cortex and provide an insight into normal brain development and neuropsychological diseases. The aim of this study was to compare cortical structural characteristics of normal human brain between 3T and 7T MRI systems using surface-based morphometry based on high resolution structural MR imaging. Methods Twelve healthy volunteers were scanned by both 3T with 3D T1-weighted fast spoiled gradient recalled echo (3D T1-FSPGR) sequence and 7T with 3D T1-weighted magnetization-prepared rapid gradient echo (3D T1-MPRAGE) sequence...
December 30, 2017: Chinese Medical Sciences Journal, Chung-kuo i Hsüeh K'o Hsüeh Tsa Chih
https://www.readbyqxmd.com/read/29301040/where-and-when-to-cut-fluorescein-guidance-for-brain-stem-and-spinal-cord-tumor-surgery-technical-note
#16
Eric Suero Molina, Walter Stummer
BACKGROUND: Spinal cord and brain stem lesions require a judicious approach with an optimized trajectory due to a clustering of functions on their surfaces. Intraoperative mapping helps locate function. To confidently locate such lesions, neuronavigation alone lacks the desired accuracy and is of limited use in the spinal cord. OBJECTIVE: To evaluate the clinical value of fluoresceins for initial delineation of such critically located lesions. METHODS: We evaluated fluorescein guidance in the surgical resection of lesions with blood-brain barrier disruption demonstrating contrast enhancement in magnet resonance imaging in the spinal cord and in the brain stem in 3 different patients...
December 29, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29299390/cortical-morphology-in-patients-with-transient-global-amnesia
#17
Hyung Chan Kim, Byung In Lee, Sung Eun Kim, Kang Min Park
Objective: This study evaluated alterations in cortical morphology in patients with transient global amnesia (TGA). Materials and Methods: Diagnoses of TGA occurred at our hospital. Evaluation involved a structured interview to obtain clinical information and a brain magnetic resonance imaging scan. We analyzed whole-brain T1-weighted MRI data using FreeSurfer 5.1. Measures of cortical morphology, such as thickness, surface area, volume, and curvature were compared between patients with TGA and healthy controls...
December 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29288869/human-in-vivo-brain-magnetic-resonance-current-density-imaging-mrcdi
#18
Cihan Göksu, Lars G Hanson, Hartwig R Siebner, Philipp Ehses, Klaus Scheffler, Axel Thielscher
Magnetic resonance current density imaging (MRCDI) and MR electrical impedance tomography (MREIT) are two emerging modalities, which combine weak time-varying currents injected via surface electrodes with magnetic resonance imaging (MRI) to acquire information about the current flow and ohmic conductivity distribution at high spatial resolution. The injected current flow creates a magnetic field in the head, and the component of the induced magnetic field ΔBz,c parallel to the main scanner field causes small shifts in the precession frequency of the magnetization...
December 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/29285884/two-year-observational-study-of-deferiprone-in-superficial-siderosis
#19
Remi A Kessler, Xu Li, Kateryna Schwartz, Hwa Huang, Maureen A Mealy, Michael Levy
INTRODUCTION: Superficial siderosis is a rare, neurodegenerative disease caused by toxic accumulation of hemosiderin on the surface of the brain and the spinal cord, most commonly from chronic subarachnoid hemorrhage. AIMS: The aim of this study was to assess the clinical and radiological outcomes of superficial siderosis patients using deferiprone, a cell permeant iron chelator. Subjects obtained pre- and post-treatment brain MRIs and weekly laboratory tests. Osirix software was used to develop a method of quantifying hemosiderin deposition...
December 28, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29285552/focal-cortical-thinning-in-patients-with-stable-relapsing-remitting-multiple-sclerosis-cross-sectional-based-novel-estimation-of-gray-matter-kinetics
#20
Lior Orbach, Shay Menascu, Chen Hoffmann, Shmuel Miron, Anat Achiron
PURPOSE: The aim of our study is to identify radiological patterns of cortical gray matter atrophy (CGMA) that correlate with disease duration in patients with relapsing-remitting multiple sclerosis (RRMS). METHODS: RRMS patients were randomly selected from the Sheba Multiple Sclerosis (MS) center computerized data registry based on stratification of disease duration up to 10 years. Patients were scanned by 3.0 T (Signa, GE) MRI, using a T1 weighted 3D high resolution, FSPGR, MS protocol...
February 2018: Neuroradiology
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