A multi-path 2.5 dimensional convolutional neural network system for segmenting stroke lesions in brain MRI images

Publication date: Available online 9 December 2019Source: NeuroImage: ClinicalAuthor(s): Yunzhe Xue, Fadi G. Farhat, Olga Boukrina, A.M. Barrett, Jeffrey R. Binder, Usman W. Roshan, William W. GravesAbstractAutomatic identification of brain lesions from magnetic resonance imaging (MRI) scans of stroke survivors would be a useful aid in patient diagnosis and treatment planning. It would also greatly facilitate the study of brain-behavior relationships by eliminating the laborious step of having a human expert manually segment the lesion on each brain scan. We propose a multi-modal multi-path convolutional neural network system for automating stroke lesion segmentation. Our system has nine end-to-end UNets that take as input 2-dimensional (2D) slices and examines all three planes with three different normalizations. Outputs from these nine total paths are concatenated into a 3D volume that is then passed to a 3D convolutional neural network to output a final lesion mask. We trained and tested our method on datasets from three sources: Medical College of Wisconsin (MCW), Kessler Foundation (KF), and the publicly available Anatomical Tracings of Lesions After Stroke (ATLAS) dataset. To promote wide applicability, lesions were included from both subacute (1 to 5 weeks) and chronic ( >  3 months) phases post stroke, and were of both hemorrhagic and ischemic etiology. Cross-study validation results (with independent training and validation datasets) were obtained to compare w...
Source: NeuroImage: Clinical - Category: Radiology Source Type: research

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CONCLUSION: Symptomatic patients with ipsilateral carotid stenosis and silent brain ischaemia on pre-operative MR-DWI, more often showed pathological evidence of IPH compared with those without ischaemic lesions. This identifies carotid IPH as a marker for patients at risk of silent brain ischaemia and possibly for future stroke and other arterial disease complications. Such patients may be more likely to benefit from CEA than those without evidence of ipsilateral carotid IPH. PMID: 31631008 [PubMed - as supplied by publisher]
Source: PubMed: Eur J Vasc Endovasc ... - Category: Surgery Authors: Tags: Eur J Vasc Endovasc Surg Source Type: research
Conclusion: Intracranial artery calcification is common in patients with ischemic cerebrovascular disease and the intracranial carotid artery is most frequently affected. Intracranial arterial calcifications might be associated with imaging markers of SVD and are highly correlated with WMHs, lacunes, and CMBs. Quantification of calcification on CT provides additional information on the pathophysiology of SVD. Intracranial arterial calcification could act as a potential marker of SVD. Introduction Atherosclerosis is a systemic vascular process that is considered a major cause of cerebrovascular and cardiovascular di...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Conclusion: These findings indicate that TBI differentially affects the levels of sex-steroid hormones in men and women patients. Plasma levels of testosterone could be a good candidate blood marker to predict recovery from unconsciousness after sTBI for male patients. Introduction Traumatic brain injury (TBI) is a major cause of death and disability worldwide and is increasing in incidence (1). Patients with acute severe TBI (sTBI) often develop severe disorders of consciousness, i.e., coma, minimally conscious state or vegetative state. Although many patients may regain consciousness during the 1-month post-TBI p...
Source: Frontiers in Endocrinology - Category: Endocrinology Source Type: research
Conclusions: Our results demonstrate that the presence and extent of cSS are associated with reduced CSF ß-amyloid 42 levels. Further studies are needed to investigate the underlying mechanisms of this association. Introduction Cerebral amyloid angiopathy (CAA)—characterized by the deposition of ß-amyloid in the walls of leptomeningeal vessels—is a common cerebral small vessel disease and a major cause of intracerebral hemorrhage in the elderly (1–3). Furthermore, it has become evident that CAA is associated with cognitive impairment (4). Specifically, it has been shown that CAA patien...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Shanshan Zhang1, Dongli Yuan2 and Ge Tan1* 1Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China 2The Institute of Medical Information, Chongqing Medical University, Chongqing, China Primary systemic vasculitis can affect every structure in both the central and peripheral nervous system, causing varied neurological manifestations of neurological dysfunction. Early recognition of the underlying causes of the neurological symptoms can facilitate timely treatment and improve the prognosis. This review highlights the clinical manifestations of primary systemic vasc...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Johannes Schurig1,2*, Karl Georg Haeusler1,2,3, Ulrike Grittner4,5, Christian H. Nolte1,2, Jochen B. Fiebach1,2, Heinrich J. Audebert1,2, Matthias Endres1,2,5,6 and Andrea Rocco1,2 1Center for Stroke Research Berlin, Charité–Universitätsmedizin Berlin, Berlin, Germany 2Department of Neurology, Charité–Universitätsmedizin Berlin, Berlin, Germany 3Department of Neurology, Universitätsklinikum Würzburg, Würzburg, Germany 4Insitute of Biometry and Clinical Epidemiology, Charité – Universitätsmedizin Berlin, Berlin, Germany 5Berlin Institute of Heal...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Ahmed Mohamed Elhfnawy1*, Peter U. Heuschmann2, Mirko Pham3†, Jens Volkmann1† and Felix Fluri1,4 1Department of Neurology, University Hospital Würzburg, Würzburg, Germany 2Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany 3Institute of Diagnostic and Interventional Neuroradiology, University Hospital of Würzburg, Würzburg, Germany 4Department of Neurology, Kantonssptial St. Gallen, St. Gallen, Switzerland Background and Purpose: Internal carotid artery stenosis (ICAS)≥70% is a leading cause of ischemic cerebrovascular event...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
ConclusionsFast MRI at 1.5  T is a reliable method for the detection and characterization of acute ischemic stroke in comparison with conventional MRI.Key Points• Fast MRI at 1.5 T may achieve a high intermethod reliability in the detection and characterization of acute ischemic stroke with a reduction in scan time in comparison with conventional MRI.
Source: European Radiology - Category: Radiology Source Type: research
Conclusions: There are limited reports of protamine reversal of heparin before IV-tPA administration. To our knowledge, there are only 6 AIS cases including ours. Three cases received 0.6 mg/kg of tPA dose. All have favorable outcomes and no intracranial hemorrhage was reported. Protamine reversal of heparin for AIS after CC seems to be safe. Further studies are needed to confirm the therapeutic safety and efficacy of this strategy.
Source: The Neurologist - Category: Neurology Tags: Case Report/Case Series Source Type: research
Conclusions The spectrum of stroke in a developing country was similar to published series from developed countries in terms of final diagnosis, risk factors, and delay to ED presentation, neuroimaging, and long-term neurodeficits. No tropical diseases were identified as risk factors.
Source: Pediatric Emergency Care - Category: Emergency Medicine Tags: Original Articles Source Type: research
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