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https://www.readbyqxmd.com/read/29154897/identification-of-ghost-artifact-using-texture-analysis-in-pediatric-spinal-cord-diffusion-tensor-images
#1
Mahdi Alizadeh, Chris J Conklin, Devon M Middleton, Pallav Shah, Sona Saksena, Laura Krisa, Jürgen Finsterbusch, Scott H Faro, M J Mulcahey, Feroze B Mohamed
PURPOSE: Ghost artifacts are a major contributor to degradation of spinal cord diffusion tensor images. A multi-stage post-processing pipeline was designed, implemented and validated to automatically remove ghost artifacts arising from reduced field of view diffusion tensor imaging (DTI) of the pediatric spinal cord. METHOD: A total of 12 pediatric subjects including 7 healthy subjects (mean age=11.34years) with no evidence of spinal cord injury or pathology and 5 patients (mean age=10...
November 14, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29153957/adaptive-neuro-heuristic-hybrid-model-for-fruit-peel-defects-detection
#2
Marcin Woźniak, Dawid Połap
Fusion of machine learning methods benefits in decision support systems. A composition of approaches gives a possibility to use the most efficient features composed into one solution. In this article we would like to present an approach to the development of adaptive method based on fusion of proposed novel neural architecture and heuristic search into one co-working solution. We propose a developed neural network architecture that adapts to processed input co-working with heuristic method used to precisely detect areas of interest...
November 15, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29143276/long-term-impact-of-temozolomide-on-1p-19q-codeleted-low-grade-glioma-growth-kinetics
#3
C Izquierdo, A Alentorn, A Idbaih, M Simó, G Kaloshi, D Ricard, M Barritault, D Meyronet, J Bruna, J Honnorat, J Y Delattre, F Ducray
Although upfront temozolomide (TMZ) has been widely-used to treat 1p/19q-codeleted diffuse low-grade gliomas (LGG), its long-term impact on the growth kinetics of these tumors has not been determined. Based on serial magnetic resonance images we retrospectively evaluated the evolution of the mean tumor diameter (MTD) in 36 progressive 1p/19q-codeleted LGG treated with upfront TMZ. After TMZ onset, all but two patients (94.4%) presented a progressive MTD decrease that lasted for a median duration of 23 months (range 3-114)...
November 15, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29142557/outcome-of-burr-hole-aspiration-of-brain-abscess
#4
Shakeel Ahmad, Lal Rehman, Ali Afzal, Raza Rizvi
Objective: To determine the clinical outcome of burr-hole aspiration of brain abscess. Methods: We analyzed 100 cases of intracranial abscess, treated surgically from January 2015 and October 2016 at Jinnah Postgraduate Medical Centre (JPMC). All patients were treated with burr hole aspiration. Medical records were analyzed for demographics, clinical presentation, predisposing factors, abscess location on imaging and clinical outcomes were charted. Results: The study included 100 patients with 73 (73%) males and 27 (27%) females with a mean age of 36...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29140815/neuroimaging-diagnostic-and-monitoring-approaches-in-ophthalmology
#5
Bart K Chwalisz, Marc A Bouffard, Sashank Prasad, Dean M Cestari
PURPOSE OF REVIEW: We review new applications of optical coherence tomography (OCT) technology in neuro-ophthalmology. We also describe new technologies for visualizing the extracranial vessels in the diagnosis of giant cell arteritis (GCA). RECENT FINDINGS: Newer OCT modalities are expanding the evaluation of the optic disc, and are being applied to a number of neurologic conditions such as demyelinating and neurodegenerative disease. Swept-source OCT and enhanced-depth imaging OCT are refining the fine-grained analysis of the optic nerve head in the diagnosis of papilledema and optic nerve drusen...
November 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29121778/intraoperative-image-guided-surgery-in-neuro-oncology-with-specific-focus-on-high-grade-gliomas
#6
Syed O Mahboob, Muftah Eljamel
Surgery is paramount in glioma management and extent of resection is an independent significant prognostic factor. However, these tumors are often invisible intraoperatively. Hence imaging plays an important role in surgical guidance. A critical literature review, using MEDLINE/PubMed service was carried out. It demonstrated a gross total resection (GTR) with neuronavigation (NNS) of 31-36%, adding 5-aminolevulinic acid or fluorescein fluorescence, or intraoperative ultrasound or MRI improved GTR to 69.1, 84...
November 2017: Future Oncology
https://www.readbyqxmd.com/read/29118725/cognitive-and-neural-correlates-of-mathematical-giftedness-in-adults-and-children-a-review
#7
REVIEW
Timothy Myers, Emma Carey, Dénes Szűcs
Most mathematical cognition research has focused on understanding normal adult function and child development as well as mildly and moderately impaired mathematical skill, often labeled developmental dyscalculia and/or mathematical learning disability. In contrast, much less research is available on cognitive and neural correlates of gifted/excellent mathematical knowledge in adults and children. In order to facilitate further inquiry into this area, here we review 40 available studies, which examine the cognitive and neural basis of gifted mathematics...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29116426/high-resolution-language-mapping-of-broca-s-region-with-transcranial-magnetic-stimulation
#8
Katrin Sakreida, Inga Lange, Klaus Willmes, Stefan Heim, Ferdinand Binkofski, Hans Clusmann, Georg Neuloh
Broca's region, corresponding roughly to cytoarchitectonic areas 44 and 45 in the inferior frontal cortex, holds a multifunctional role in language processing, as shown, e.g., by functional imaging data. Neuro-navigated transcranial magnetic stimulation (TMS) enables complementary non-invasive mapping of cortical functions with high spatial resolution. Here, we report on detailed TMS language mapping of Broca's region in 12 healthy participants. The test protocol with an object naming task was adapted for high-resolution and semi-quantitative mapping of TMS-induced effects on speech and language performance...
November 7, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/29114999/comparison-between-site-and-central-radiological-assessments-for-patients-with-recurrent-glioblastoma-on-a-clinical-trial
#9
Kathryn M Field, Greg Fitt, Mark A Rosenthal, John Simes, Anna K Nowak, Elizabeth H Barnes, Kate Sawkins, Christine Goh, Bradford A Moffat, Simon Salinas, Lawrence Cher, Helen Wheeler, Elizabeth J Hovey, Pramit M Phal
AIM: Assessment of magnetic resonance imaging (MRI) in glioblastoma can be challenging. For patients with recurrent glioblastoma managed on the CABARET trial, we compared disease status assessed at hospitals and subsequent blinded central expert radiological review. METHODS: MRI results and clinical status at specified time points were used for site and central assessment of disease status. Clinical status was determined by the site. Response Assessment in Neuro-Oncology (RANO) criteria were used for both assessments...
November 8, 2017: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29108864/neuro-glial-cannabinoid-receptors-modulate-signaling-in-the-embryonic-avian-retina
#10
Regina C C Kubrusly, Alexander Günter, Luzia Sampaio, Roberta Silva Martins, Clarissa S Schitine, Priscila Trindade, Arlete Fernandes, Rosa Borelli-Torres, Vivian Sayuri Miya-Coreixas, Anna Carolina Rego Costa, Hércules Rezende Freitas, Patrícia F Gardino, Fernando G de Mello, Karin Costa Calaza, Ricardo A M Reis
Endocannabinoids are endogenous lipids that activate selective G protein coupled receptors (CB1 and CB2), mostly found at neuronal presynaptic sites in the nervous system. One of the main consequences of the activation of CB receptors is a decrease in GABA or glutamate release, controlling cell excitability. Here we studied the expression of CB1 and CB2 receptors in E8C8 cultured retina cells (embryonic day 8 and 8 days in vitro) using immunocytochemistry and western blot analysis. We also evaluated their functions in terms of cyclic AMP (cAMP) production, single cell calcium imaging (SCCI) and GABA release induced in basal conditions or activated by l-Aspartate (L-ASP) in cell cultures or under ischemia in young chick retina...
November 3, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/29105725/visualization-of-superficial-cerebral-lesions-using-a-smartphone-application
#11
İhsan Doğan, Ümit Eroğlu, Onur Özgüral, Eyyub S Al-Beyati, M Cemil Kilinç, Ayhan Cömert, Melih Bozkurt
AIM: Accurate localizations of cerebral lesions ensure good surgical outcomes and minimize intraoperative complications. Currently, microscope integrated neuronavigation systems compensate these requirements. Since these units are expensive and large, the need to create more practical and portable systems in this "smart" century has become apparent. MATERIAL AND METHODS: See-Through Camera smartphone application is a photography app that penetrates the existing background picture and merges this with camera image on smartphone display...
May 22, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29098418/bilateral-carotid-cavernous-sinus-fistula-a-case-report-and-review-of-the-literature
#12
REVIEW
Gavin Docherty, Maryam Eslami, Kailun Jiang, Jason S Barton
Carotid cavernous fistula (CCF) is an abnormal vascular shunt from the carotid artery to the cavernous sinus. They are commonly classified based on hemodynamics, etiology or anatomically. Hemodynamic classification refers to whether the fistula is high or low flow. Etiology is commonly secondary to trauma or can occur spontaneously in the setting of aneurysm or medical conditions predisposing to arterial wall defects. Bilateral carotid cavernous fistulas are rare. We present a case of bilateral CCF secondary to trauma...
November 2, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29095850/lesions-in-deep-gray-nuclei-after-severe-traumatic-brain-injury-predict-neurologic-outcome
#13
Frédéric Clarençon, Éric Bardinet, Jacques Martinerie, Vincent Pelbarg, Nicolas Menjot de Champfleur, Rajiv Gupta, Eléonore Tollard, Gustavo Soto-Ares, Danielle Ibarrola, Emmanuelle Schmitt, Thomas Tourdias, Vincent Degos, Jérome Yelnik, Didier Dormont, Louis Puybasset, Damien Galanaud
PURPOSE: This study evaluates the correlation between injuries to deep gray matter nuclei, as quantitated by lesions in these nuclei on MR T2 Fast Spin Echo (T2 FSE) images, with 6-month neurological outcome after severe traumatic brain injury (TBI). MATERIALS AND METHODS: Ninety-five patients (80 males, mean age = 36.7y) with severe TBI were prospectively enrolled. All patients underwent a MR scan within the 45 days after the trauma that included a T2 FSE acquisition...
2017: PloS One
https://www.readbyqxmd.com/read/29095768/the-optic-disc-drusen-studies-consortium-recommendations-for-diagnosis-of-optic-disc-drusen-using-optical-coherence-tomography
#14
Lasse Malmqvist, Lulu Bursztyn, Fiona Costello, Kathleen Digre, J Alexander Fraser, Clare Fraser, Bradley Katz, Mitchell Lawlor, Axel Petzold, Patrick Sibony, Judith Warner, Marianne Wegener, Sui Wong, Steffen Hamann
BACKGROUND: Making an accurate diagnosis of optic disc drusen (ODD) is important as part of the work-up for possible life-threatening optic disc edema. It also is important to follow the slowly progressive visual field defects many patients with ODD experience. The introduction of enhanced depth imaging optical coherence tomography (EDI-OCT) has improved the visualization of more deeply buried ODD. There is, however, no consensus regarding the diagnosis of ODD using OCT. The purpose of this study was to develop a consensus recommendation for diagnosing ODD using OCT...
October 24, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29093495/application-of-multimodal-navigation-together-with-fluorescein-angiography-in-microsurgical-treatment-of-cerebral-arteriovenous-malformations
#15
Shiyu Feng, Yanyang Zhang, Zhenghui Sun, Chen Wu, Zhe Xue, Yudong Ma, Jinli Jiang
This study aimed to explore the clinical applications of multimodal navigation combined with indocyanine green (ICG) fluorescein angiography in microsurgical treatment of cerebral arteriovenous malformations (AVMs). We retrospectively collected 52 patients with AVMs. Assisted by anatomic image, we reestablished three-dimensional structure using preoperative functional magnetic resonance imaging (fMRI) and Diffusion tensor imaging (DTI). The operation for lesion resection was finished under the assistance of neuro-navigation...
November 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29089158/cerebellar-ataxia-with-neuropathy-and-vestibular-areflexia-syndrome-canvas
#16
Masakatsu Taki, Takashi Nakamura, Hiraku Matsuura, Tatsuhisa Hasegawa, Hirofumi Sakaguchi, Kanako Morita, Ryotaro Ishii, Ikuko Mizuta, Takashi Kasai, Toshiki Mizuno, Shigeru Hirano
Cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome (CANVAS) is a novel ataxic disorder consisting of the triad of cerebellar impairment, bilateral vestibular hypofunction, and a somatosensory deficit. We report the first Japanese case of CANVAS. The patient is a 68-year-old Japanese male. He was referred to our university for further evaluation of progressive gait disturbance and ataxia. He exhibited horizontal gaze-evoked nystagmus and sensory deficit. Nerve conduction studies showed sensory neuronopathy...
October 28, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29080146/use-of-narrow-band-imaging-and-4k-technology-in-otology-and-neuro-otology-preliminary-experience-and-feasibility-study
#17
Henry Zhang, Phui Yee Wong, Tiarnan Magos, Jabin Thaj, Gaurav Kumar
The advent of the endoscope has facilitated otological surgery in recent years. Advances in optical technology have led to the development of high definition visualisation, such as 4K magnification. Narrow band imaging (NBI) has been shown to improve visualisation of tissue based on varying degrees of vascularity. This is a feasibility study, the first of its kind, aiming to investigate the appearances of middle ear anatomy and pathology (tympanic membrane, tympanosclerosis, cholesteatoma, granulation, endolymphatic sac hydrops, otosclerosis) under the NBI filter, using a high definition 4K endoscope...
October 27, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29075903/the-tethered-effect-of-the-arachnoid-in-vago-glossopharyngeal-neuralgia-a-real-associated-alternative-mechanism
#18
Florian Bernard, Philippe Mercier, Marc Sindou
Vago-glossopharyngeal neuralgia (VGPN) is a rarely seen disease when compared to trigeminal neuralgia. When the pain is resistant to medical therapy, microvascular decompression can be performed if a vascular conflict is suspected on magnetic resonance imaging (MRI). In addition, arachnoid pathology may play a role in VGPN. We report two cases of VGPN caused by tethered arachnoid, associated with a vascular contact in which pain was reduced by freeing rootlets from arachnoid compression. We report two cases relating to 50-year-old and 30-year-old men with a history of electric shooting pain triggered by swallowing in the right pharyngeal and auricular regions...
October 26, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29075902/relation-of-gray-white-matter-ratio-with-long-term-cognitive-functions-and-quality-of-life-in-patients-with-mild-to-moderate-aneurysmal-subarachnoid-hemorrhage-a-prospective-observational-study
#19
Achmet Ali, Gamze Tanirgan, Pulat Akin Sabanci, Nukhet Sivrikoz, Taner Abdullah, Altay Sencer, Serra Sencer, Mukadder Orhan-Sungur, Ibrahim Ozkan Akinci
BACKGROUND: In the present study, we hypothesized that a low gray matter-white matter ratio (GWR) is associated with poor cognitive function and low quality of life in patients with mild to moderate (WFNS ≤3) aneurysmal subarachnoid hemorrhage (aSAH). METHODS: All patients with aSAH who were admitted to the neurointensive care unit (Neuro ICU) and whose WFNS score was ≤ 3 were enrolled in the study. During the Neuro ICU follow-up period, the following variables were recorded: demographics, neurological status, comorbidities, time elapsed between onset of bleeding and Neuro ICU admission, treatment method, number of days with vasospasm symptoms (DVS) and vasopressor usage...
October 26, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29073725/radiomics-in-paediatric-neuro-oncology-a-multicentre-study-on-mri-texture-analysis
#20
Ahmed E Fetit, Jan Novak, Daniel Rodriguez, Dorothee P Auer, Christopher A Clark, Richard G Grundy, Andrew C Peet, Theodoros N Arvanitis
Brain tumours are the most common solid cancers in children in the UK and are the most common cause of cancer deaths in this age group. Despite current advances in MRI, non-invasive diagnosis of paediatric brain tumours has yet to find its way into routine clinical practice. Radiomics, the high-throughput extraction and analysis of quantitative image features (e.g. texture), offers potential solutions for tumour characterization and decision support. In the search for diagnostic oncological markers, the primary aim of this work was to study the application of MRI texture analysis (TA) for the classification of paediatric brain tumours...
October 26, 2017: NMR in Biomedicine
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