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Neuroradiology

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https://www.readbyqxmd.com/read/28918513/imaging-findings-of-primary-immunoglobulin-g4-related-cervical-lymphadenopathy
#1
Masaya Kawaguchi, Hiroki Kato, Yusuke Kito, Keisuke Mizuta, Mitsuhiro Aoki, Keizo Kato, Satoshi Goshima, Masayuki Matsuo
PURPOSE: The purpose of the present study was to assess imaging findings of primary immunoglobulin G4 (IgG4)-related cervical lymphadenopathy. METHODS: Five consecutive patients with clinically, serologically, and histopathologically confirmed primary IgG4-related cervical lymphadenopathy without any other organ involvement were included. All patients underwent contrast-enhanced computed tomography (CT), and four underwent (18)F-fluorodeoxyglucose (FDG)-positron emission tomography (PET)/CT...
September 16, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28913611/prospective-intraindividual-comparison-of-gadoterate-and-gadobutrol-for-cervical-and-intracranial-contrast-enhanced-magnetic-resonance-angiography
#2
Philip Hoelter, Stefan Lang, Marina Weibart, Manuel Schmidt, Michael F X Knott, Tobias Engelhorn, Marco Essig, Stephan Kloska, Arnd Doerfler
PURPOSE: Gadobutrol (GB) is reported to provide improved relaxivity and concentration compared to gadoterate (GT). This study was designed to intraindividually compare quantitative and qualitative enhancement characteristics of GB to GT in cervicocranial magnetic resonance angiography (MRA) of patients with cerebrovascular disease (CVD). METHODS: Patients (n = 54) with CVD underwent two identical contrast-enhanced magnetic resonance angiography (CE-MRA) examinations of the cervical and intracranial vasculature in randomized order, using GB and GT in equimolar dose...
September 14, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28913584/diffusivity-changes-in-bevacizumab-responding-and-refractory-meningioma
#3
LETTER
Ulrich Roelcke, Jatta Berberat, Christoph Mamot, Luca Remonda
No abstract text is available yet for this article.
September 14, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28894890/new-prognostic-factor-telomerase-reverse-transcriptase-promotor-mutation-presents-without-mr-imaging-biomarkers-in-primary-glioblastoma
#4
Tunc F Ersoy, Vera C Keil, Dariusch R Hadizadeh, Gerrit H Gielen, Rolf Fimmers, Andreas Waha, Barbara Heidenreich, Rajiv Kumar, Hans H Schild, Matthias Simon
PURPOSE: Magnetic resonance (MR) imaging biomarkers can assist in the non-invasive assessment of the genetic status in glioblastomas (GBMs). Telomerase reverse transcriptase (TERT) promoter mutations are associated with a negative prognosis. This study was performed to identify MR imaging biomarkers to forecast the TERT mutation status. METHODS: Pre-operative MRIs of 64/67 genetically confirmed primary GBM patients (51/67 TERT-mutated with rs2853669 polymorphism) were analyzed according to Visually AcceSAble Rembrandt Images (VASARI) ( https://wiki...
September 11, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28889255/motor-related-brain-abnormalities-in-hiv-infected-patients-a-multimodal-mri-study
#5
Yawen Zhou, Ruili Li, Xiaoxiao Wang, Hui Miao, Yarui Wei, Rizwan Ali, Bensheng Qiu, Hongjun Li
PURPOSE: It is generally believed that HIV infection could cause HIV-associated neurocognitive disorders (HAND) across a broad range of functional domains. Some of the most common findings are deficits in motor control. However, to date no neuroimaging studies have evaluated basic motor control in HIV-infected patients using a multimodal approach. METHODS: In this study, we utilized high-resolution structural imaging and task-state functional magnetic resonance imaging (fMRI) to assess brain structure and motor function in a homogeneous cohort of HIV-infected patients...
September 9, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28887663/presumptive-diagnosis-of-multinodular-vacuolating-tumor-more-than-meets-the-eye
#6
LETTER
Renato Hoffmann Nunes, Charlie Chia-Tsong Hsu, Anne G Osborn
No abstract text is available yet for this article.
September 8, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28887618/diagnostic-value-of-3d-time-of-flight-magnetic-resonance-angiography-for-detecting-intracranial-aneurysm-a-meta-analysis
#7
REVIEW
Liu HaiFeng, Xu YongSheng, Xun YangQin, Dou Yu, Wang ShuaiWen, Lu XingRu, Lei JunQiang
PURPOSE: This meta-analysis is to comprehensively evaluate the diagnostic performance of three-dimensional time-of-flight magnetic resonance angiography (3D-TOF-MRA) for detecting intracranial aneurysm (IA). METHODS: PubMed, Embase, Web of Science, and the Cochrane library were systematically searched for retrieving eligible studies. Study inclusion, data extraction, and risk of bias assessment were performed by two researchers independently. Pooled sensitivity (SEN), specificity (SPE), positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), and area under the curve (AUC) were calculated to assess the diagnostic value...
September 8, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28879505/recovery-of-oculomotor-nerve-palsy-after-endovascular-treatment-of-ruptured-posterior-communicating-artery-aneurysm
#8
Qing-Quan Zu, Xing-Long Liu, Bin Wang, Chun-Gao Zhou, Jin-Guo Xia, Lin-Bo Zhao, Hai-Bin Shi, Sheng Liu
PURPOSE: Oculomotor nerve palsy (ONP) may result from Posterior communicating artery (Pcom) aneurysms. Endovascular treatment of ruptured Pcom aneurysms generally is a safe procedure, but the effect of this therapy on ONP is incompletely elucidated. This retrospective study evaluates outcomes of ONP after endovascular treatment for ruptured Pcom aneurysm and with the intention to clarify predictors of recovery. METHODS: From May 2010 to October 2015, 210 patients with Pcom aneurysms underwent endovascular treatment at our institution...
September 6, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28879377/erratum-to-extended-diffusion-weighted-magnetic-resonance-imaging-with-two-compartment-and-anomalous-diffusion-models-for-differentiation-of-low-grade-and-high-grade-brain-tumors-in-pediatric-patients
#9
Delilah Burrowes, Jason R Fangusaro, Paige C Nelson, Bin Zhang, Nitin R Wadhwani, Michael N Rozenfeld, Jie Deng
No abstract text is available yet for this article.
September 6, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28875355/is-there-an-association-between-flow-diverter-fish-mouthing-and-delayed-type-hypersensitivity-to-metals-a-case-control-study
#10
Naci Kocer, Prabath Kumar Mondel, Elif Yamac, Ayse Kavak, Osman Kizilkilic, Civan Islak
PURPOSE: Flow diverters are increasingly used in the treatment of complex and giant intracranial aneurysms. However, they are associated with complications like late aneurysmal rupture. Additionally, flow diverters show focal structural decrease in luminal diameter without any intimal hyperplasia. This resembles a "fish mouth" when viewed en face. In this pilot study, we tested the hypothesis of a possible association between flow diverter fish-mouthing and delayed-type hypersensitivity to its metal constituents...
September 5, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28864914/nonketotic-hyperglycinemia-spectrum-of-imaging-findings-with-emphasis-on-diffusion-weighted-imaging
#11
Shaimaa Abdelsattar Mohammad, Heba Salah Abdelkhalek
PURPOSE: The purpose of this study was to explore brain abnormalities in nonketotic hyperglycinemia (NKH) using diffusion-weighted imaging (DWI) and when feasible, diffusion tensor imaging (DTI) and tractography. METHODS: Seven patients with confirmed diagnosis of NKH (8 days-2 years) underwent brain MRI. Conventional T1 and T2WI were acquired in all patients, DWI in six and DTI and tractography in two (4 months and 2 years). Measurements of fractional anisotropy (FA), radial diffusivity (RD), axial diffusivity (AD) and Trace from eight white matter regions were compared between the two patients and age-matched controls...
September 1, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28864854/time-resolved-ct-assessment-of-collaterals-as-imaging-biomarkers-to-predict-clinical-outcomes-in-acute-ischemic-stroke
#12
Elizabeth Tong, Jim Patrie, Sara Tong, Avery Evans, Patrik Michel, Ashraf Eskandari, Max Wintermark
PURPOSE: Collateral circulation plays a pivotal role in the pathophysiology of acute ischemic stroke and is increasingly recognized as a promising biomarker for predicting the clinical outcome. However, there is no single established grading system. We designed a novel machine-learning software that allows non-invasive, objective, and quantitative assessment of collaterals according to their vascular territories. Our goal is to investigate the prognostic and predictive value of this collateral score for the prediction of acute stroke outcome...
September 1, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28861622/perfusion-magnetic-resonance-imaging-in-pediatric-brain-tumors
#13
F Dallery, R Bouzerar, D Michel, C Attencourt, V Promelle, J Peltier, J M Constans, O Balédent, C Gondry-Jouet
PURPOSE: The use of DSC-MR imaging in pediatric neuroradiology is gradually growing. However, the number of studies listed in the literature remains limited. We propose to assess the perfusion and permeability parameters in pediatric brain tumor grading. METHODS: Thirty children with a brain tumor having benefited from a DSC-MR perfusion sequence have been retrospectively explored. Relative CBF and CBV were computed on the ROI with the largest lesion coverage. Assessment of the lesion's permeability was also performed through the semi-quantitative PSR parameter and the K2 model-based parameter on the whole-lesion ROI and a reduced ROI drawn on the permeability maps...
August 31, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28856389/structural-and-metabolic-changes-in-the-traumatically-injured-rat-brain-high-resolution-in-vivo-proton-magnetic-resonance-spectroscopy-at-7%C3%A2-t
#14
Jing Li, Can Zhao, Jia-Sheng Rao, Fei-Xiang Yang, Zhan-Jing Wang, Jian-Feng Lei, Zhao-Yang Yang, Xiao-Guang Li
PURPOSE: The understanding of microstructural and metabolic changes in the post-traumatic brain injury is the key to brain damage suppression and repair in clinics. METHODS: Ten female Wistar rats were traumatically injured in the brain CA1 region and above the cortex. Next, diffusion tensor magnetic resonance imaging (DTI) and proton magnetic resonance spectroscopy ((1)H MRS) were used to analyze the microstructural and metabolic changes in the brain within the following 2 weeks...
August 31, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28852818/cerebral-lupus-presented-with-late-postpartum-eclampsia-and-atypical-reversible-leucoencephalopathy
#15
LETTER
Inthiporn Maethasith, Pornchai Sathirapanya
No abstract text is available yet for this article.
August 29, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28844080/synthetic-mri-showed-increased-myelin-partial-volume-in-the-white-matter-of-a-patient-with-sturge-weber-syndrome
#16
LETTER
Akifumi Hagiwara, Christina Andica, Masaaki Hori, Shigeki Aoki
No abstract text is available yet for this article.
August 26, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28842742/in-vitro-contrast-agent-based-evaluation-of-the-influence-of-flow-diverter-size-and-position-on-intra-aneurysmal-flow-dynamics-using-syngo-iflow
#17
Giorgio Franco Maria Cattaneo, Andreas Ding, Tobias Jost, Désirée Ley, Ruben Mühl-Bennighaus, Umut Yilmaz, Heiko Körner, Wolfgang Reith, Andreas Simgen
PURPOSE: Treatment of intracranial aneurysm with flow-diverting devices has become widespread in recent years. Despite that, intra-aneurysmal flow changes are yet not fully understood and can lead to different complications. Our aim was an in vitro contrast-based evaluation of the influence of flow diverter size and position on intra-aneurysmal flow dynamics. METHODS: Flow-diverting devices with different sizes (diameters 4.0, 4.5, and 6.0 mm) were deployed in seven silicone aneurysm models at different positions relative to the aneurysm neck (proximal, central, distal)...
August 25, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28842741/response-assessment-in-neuro-oncology-criteria-contrast-enhancement-and-perfusion-mri-for-assessing-progression-in-glioblastoma
#18
Fatima Tensaouti, Jonathan Khalifa, Amélie Lusque, Benjamin Plas, Jean Albert Lotterie, Isabelle Berry, Anne Laprie, Elizabeth Cohen-Jonathan Moyal, Vincent Lubrano
PURPOSE: The purpose of the study was to evaluate Response Assessment in Neuro-Oncology (RANO) criteria in glioblastoma multiforme (GBM), with respect to the Macdonald criteria and changes in contrast-enhancement (CE) volume. Related variations in relative cerebral blood volume (rCBV) were investigated. METHODS: Forty-three patients diagnosed between 2006 and 2010 were included. All underwent surgical resection, followed by temozolomide-based chemoradiation. MR images were retrospectively reviewed...
August 25, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28840346/disease-stage-dependent-relationship-between-diffusion-tensor-imaging-and-electrophysiology-of-the-visual-system-in-a-murine-model-of-multiple-sclerosis
#19
Christopher Nishioka, Hsiao-Fang Liang, Chen-Fang Chung, Shu-Wei Sun
PURPOSE: Diffusion tensor imaging (DTI) is commonly used to evaluate white matter integrity in multiple sclerosis (MS), but the relationship between DTI measures and functional changes during disease remains ambiguous. Using a mouse model of MS, we tested the hypothesis that DTI measures would correlate to the visual evoked potential (VEPs) dynamically at different disease stages. METHODS: In vivo DTI, gadolinium-enhanced T1WI (Gd-T1WI) and VEPs were performed in 5 control and 25 mice after 2-12 weeks of experimental autoimmune encephalomyelitis (EAE)...
August 24, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28840331/influential-factors-and-clinical-significance-of-fluid-attenuated-inversion-recovery-vascular-hyperintensities-in-transient-ischemic-attacks-of-carotid-arterial-system
#20
Xiaoyu Dong, Chaobo Bai, Jianfei Nao
PURPOSE: Fluid-attenuated inversion recovery vascular hyperintensity (FVH) is often observed in conjunction with acute ischemic stroke (AIS) of the carotid system. Despite its bearing on patient care outcomes, factors influencing FVH and its clinical significance in patients with transient ischemic attacks (TIAs) of the carotid arterial system have yet to be evaluated. METHODS: Consecutive inpatients (N = 154) diagnosed with TIAs of the carotid system in a 2-year period (2012-2014) were enrolled in our study...
August 24, 2017: Neuroradiology
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