Abstract:
OBJECTIVE:To provide an improved method for the identification and analysis of brain tumors in MRI scans using a semi-automated computational approach, that has the potential to provide a more objective, precise and quantitatively rigorous analysis, compared to human visual analysis. BACKGROUND:Self-Organizing Maps (SOM) is an unsupervised, exploratory data analysis tool, which can automatically domain an image into selfsimilar regions or clusters, based on measures of similarity. It can be used to perform image-domain of brain tissue on MR images, without prior knowledge. DESIGN/METHODS:We used SOM to analyze T1, T2 and FLAIR acquisitions from two MRI machines in our service from 14 patients with brain tumors confirmed by biopsies--three lymphomas, six glioblastomas, one meningioma, one ganglioglioma, two oligoastrocytomas and one astrocytoma. The SOM software was used to analyze the data from the three image acquisitions from each patient and generated a self-organized map for each containing 25 clusters. RESULTS:Damaged tissue was separated from the normal tissue using the SOM technique. Furthermore, in some cases it allowed to separate different areas from within the tumor--like edema/peritumoral infiltration and necrosis. In lesions with less precise boundaries in FLAIR, the estimated damaged tissue area in the resulting map appears bigger. CONCLUSIONS:Our results showed that SOM has the potential to be a powerful MR imaging analysis technique for the assessment of brain tumors.
journal_name
J Neurol Scijournal_title
Journal of the neurological sciencesauthors
Mei PA,de Carvalho Carneiro C,Fraser SJ,Min LL,Reis Fdoi
10.1016/j.jns.2015.10.032subject
Has Abstractpub_date
2015-12-15 00:00:00pages
78-83issue
1-2eissn
0022-510Xissn
1878-5883pii
S0022-510X(15)02524-1journal_volume
359pub_type
杂志文章abstract::A previously healthy 56-year-old woman presented with right-sided ophthalmic pain and diplopia following headache and fever. A neurological examination revealed 3rd and 6th right cranial nerve palsies. Brain magnetic resonance imaging (MRI) and 3D-computed tomography (CT) angiography (CTA) showed right-sided sphenoid ...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2008.11.017
更新日期:2009-03-15 00:00:00
abstract:BACKGROUND:Parkinson's disease (PD) and multiple system atrophy (MSA) are neurodegenerative diseases that can be difficult to diagnose and distinguish from each other. STUDY AIMS AND METHODS: Patients with PD and MSA and controls were studied with magnetic resonance imaging (MRI) using tissue segmentation and outlining...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2005.07.013
更新日期:2005-12-15 00:00:00
abstract::Hypereosinophilic syndrome represents a rare cause for cerebral infarctions and inflammatory neurological disorders. Various possible pathogenic mechanisms for cerebral infarctions have already been discussed. Complex mechanisms including a local hypercoagulability by eosinophilic granules as well as a direct damage t...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2015.06.031
更新日期:2015-09-15 00:00:00
abstract::Ultrastructural alterations were observed in the sciatic nerve of dystrophic mice. Myelin sheaths were abnormal in shape, abruptly ceased beyond a node of Ranvier, leaving the axon naked. These changes were seen in both afferent and efferent nerve fibres. Apparent embryonal Schwann cells and Schwann cells which were a...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/0022-510x(76)90121-0
更新日期:1976-08-01 00:00:00
abstract:INTRODUCTION:Primary lateral sclerosis is a rare neurodegenerative disorder of the upper motor neurons. Diagnostic criteria have changed considerably over the years, and the recent consensus criteria introduced 'probable PLS' for patients with a symptom duration of 2-4 years. The objective of this study is the systemat...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2020.117052
更新日期:2020-10-15 00:00:00
abstract:INTRODUCTION:Recognition of psychiatric manifestations of Wilson's disease (WD) has diagnostic and therapeutic implications. OBJECTIVE:To describe the clinical features and psychopathology of patients with WD who had initial or predominant psychiatric manifestations. PATIENT AND METHODS:Records of 15 patients with WD...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2007.09.009
更新日期:2008-03-15 00:00:00
abstract:BACKGROUND:Neuromyelitis optica (NMO) is a severe autoimmune inflammatory disorder of the central nervous system. NMO and its abortive forms are referred to as NMO spectrum disorders (NMOSD). NMOSD are mostly associated with antibodies to aquaporin-4 (AQP4-IgG). However, recent studies have demonstrated antibodies to m...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2017.08.3254
更新日期:2017-10-15 00:00:00
abstract::In rabbits subjected to bicuculline (BC)- or pentylenetetrazole (PTZ)-seizures of 3 or 20 min duration or to adrenaline-induced hypertension, specific gravity (SG) was measured bilaterally in 15 regional brain areas in order to detect possible associations between the regionally limited blood-brain barrier openings du...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/0022-510x(84)90030-3
更新日期:1984-05-01 00:00:00
abstract:OBJECTIVE:To evaluate the role of balance training on Force Platform with Visual Feedback technique (FPVF) in improving balance and functional outcome in chronic stroke survivors. DESIGN:Prospective, repeated measure study. SETTINGS:Neurological rehabilitation department of a tertiary research center. PARTICIPANTS:F...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2009.08.051
更新日期:2009-12-15 00:00:00
abstract:BACKGROUND:Neurofibromatosis 1 (NF1) belongs to the autosomal dominant neurocutaneous disorders' group, which mainly includes NF1 and NF2, tuberous sclerosis, von Hippel-Lindau disease and Cerebral Cavernous Malformations (CCMs). NF1 has a major impact on the nervous system, eye, skin, bone or cardiovascular system. Ce...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2015.02.023
更新日期:2015-03-15 00:00:00
abstract:OBJECTIVES:Central autonomic impairment is frequent in ischemic stroke at acute or chronic stages. The mechanism by which these symptoms occur in patients with ischemic stroke has not been elucidated. This study sought to investigate cardiovascular autonomic function in patients with different subtypes of post-acute is...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2013.11.036
更新日期:2014-02-15 00:00:00
abstract::In order to produce a model of ischemic neuropathy with neural microvascular alterations, sodium laurate was injected into a femoral artery and saline into the contralateral artery at the mid-thigh level in Sprague-Dawley rats aged 11 weeks. In view of the dose-related findings, 0.3 mg sodium laurate dissolved in 0.1 ...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/0022-510x(93)90026-u
更新日期:1993-12-01 00:00:00
abstract::129 patients aged 18-84 in early rehabilitation period of the first hemispheric ischemic stroke and 48 patients with cerebrovascular disorders without stroke in anamnesis were observed. Cognitive functions (MMSE, FAB, Clock Drawing Test, the 5-Word test, attention assessment, Semantic Verbal Fluency test) and emotiona...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2012.11.013
更新日期:2013-02-15 00:00:00
abstract::The role of excitotoxicity on the neuropathology of glutaric acidemia type I (GA I) is still under debate. Therefore, in the present work, we evaluated glutamate uptake by brain slices and glutamate binding to synaptic membranes, as well as glutamine synthetase activity in cerebral cortex and striatum from glutaryl-Co...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2014.09.003
更新日期:2014-11-15 00:00:00
abstract::This paper reviews the current state of knowledge about the use of diffusion-weighted MRI in the field of multiple sclerosis (MS) research. The contribution that diffusion-weighted imaging has made to our understanding of MS is critically appraised, and pointers are given to the sort of work that needs to be done befo...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章,评审
doi:10.1016/s0022-510x(01)00492-0
更新日期:2001-05-01 00:00:00
abstract::This study explores the severity of depression and anxiety experienced by patients suffering from motor neurone disease and seeks to link this to illness progression, recent life events and personality factors. The 18 patients who participated in the study were assessed for the presence of psychiatric symptoms using t...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/s0022-510x(98)00203-2
更新日期:1998-10-01 00:00:00
abstract::Gait impairment is one of the most frequent and life-altering consequences of Multiple sclerosis (MS), frequently associated with lower limb spasticity. Focal muscle vibration (fMV) is a technique that applies a vibratory stimulus to a specific muscle or its tendon, reducing spasticity. The aim of our study is to eval...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2016.11.025
更新日期:2017-01-15 00:00:00
abstract::We report a 17-year-old man showing myoclonic involuntary movement (IVM) associated with chronic manganese (Mn) poisoning. The patient, a welder, showed myoclonic IVM mainly in the right upper and lower extremities, elevated levels of Mn in the blood and hair and high-intensity signals in the globus pallidus on T1-wei...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/s0022-510x(02)00111-9
更新日期:2002-07-15 00:00:00
abstract::A boy, who had shown muscle weakness and hypotonia from early childhood and fiber type disproportion (FTD) with no dystrophic changes on muscle biopsy, was initially diagnosed as having congenital fiber type disproportion (CFTD). Subsequently, he developed cardiac conduction blocks. We reconsidered the diagnosis as po...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2014.02.036
更新日期:2014-05-15 00:00:00
abstract::Vascular dementia (VaD) is increasingly recognised to reflect an outmoded concept in that it identifies cases too late for preventive therapy to have an opportunity to prevent the development of dementia and uses a cognitive paradigm inappropriately based on Alzheimer's disease. A replacement is urgently required and ...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章,评审
doi:10.1016/s0022-510x(02)00253-8
更新日期:2002-11-15 00:00:00
abstract:OBJECT:Rebleeding from ruptured intracranial aneurysms is a major cause of death and disability. With regard to the factors that precipitate the rebleeding and influence the time course after initial bleeding, previous reports differ in their results, and the number of patients investigated was not sufficient for valid...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jns.2007.01.074
更新日期:2007-07-15 00:00:00
abstract::Recent evidence has suggested that Alzheimer's disease may result from an underlying defect of protein catabolism. In an attempt to identify such a defect, we have determined the levels of Ca(2+)-activated proteinase (principally calpain II) and endogenous inhibitor (calpastatin) activity in normal and Alzheimer's dis...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/0022-510x(91)90072-f
更新日期:1991-04-01 00:00:00
abstract::The amyloid precursor protein (APP) in brain is processed either by an amyloidogenic pathway by beta-secretase and gamma-secretase to yield Abeta (beta-amyloid 4 kDa) peptide or by alpha-secretase within the beta-amyloid domain to yield non-amyloidogenic products. We have studied blood platelet levels of a 22-kDa frag...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2005.09.002
更新日期:2006-01-15 00:00:00
abstract::Growth differentiation factor 11 (GDF11), as a rejuvenation factor in heterochronic parabiosis, can increase proliferation of primary brain capillary endothelial cells (ECs). However, the angiogenic role of GDF11 in ischemia-induced brain injury is still unclear. There are no previous reports on the spatiotemporal exp...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/j.jns.2016.08.004
更新日期:2016-10-15 00:00:00
abstract::The effects of synergist tenotomy have been studied on rat soleus muscles after denervation and after interference with sciatic axoplasmic flow with colchicine. The results suggest that neural, as well as muscular, factors cause compensatory hypertrophy (CH) of soleus. The myogenic factor may be mild depolarization of...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/0022-510x(80)90166-5
更新日期:1980-03-01 00:00:00
abstract::In-situ hybridization with labeled oligonucleotide probes was applied to explore cytokine and chemokine mRNA expression in sections of striated muscle, the target organ in experimental autoimmune myasthenia gravis (EAMG), induced in Lewis rats by immunization with acetylcholine receptor (AChR) and complete Freund's ad...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/s0022-510x(98)00181-6
更新日期:1998-11-26 00:00:00
abstract::A case of chorea-acanthocytosis (CA) syndrome is described. The presence of acanthocytes has usually been considered an important diagnostic marker of CA. However, it is not specific and other neurological diseases have to be considered. In the present report we rule out other diagnostic possibilities and show that th...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/s0022-510x(99)00005-2
更新日期:1999-03-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The progression of cognitive deterioration in patients with Alzheimer's disease (AD) is considerably variable. The ability to predict the progression rate is important for clinicians to treat and manage patients with AD. We examined the possible relationship between the rate of cognitive deterior...
journal_title:Journal of the neurological sciences
pub_type: 临床试验,杂志文章
doi:10.1016/j.jns.2009.10.022
更新日期:2010-03-15 00:00:00
abstract::Neuropathy has been frequently reported in patients with IgG monoclonal gammopathy of undetermined significance (MGUS) but it is still unclear whether this association has clinical or pathogenetic relevance. In order to clarify the possible role of IgG MGUS in the neuropathy we correlated the clinical and electrophysi...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/s0022-510x(99)00049-0
更新日期:1999-03-15 00:00:00
abstract::Acute lesions within spinal cord white matter have been studied by light and electron microscopy in 3 dogs suffering from the acute form of canine distemper encephalomyelitis (CDE). Prominent features of these lesions were viral inclusions, giant cell formation, cellular degeneration, myelin breakdown and phagocytic a...
journal_title:Journal of the neurological sciences
pub_type: 杂志文章
doi:10.1016/0022-510x(76)90251-3
更新日期:1976-11-01 00:00:00