scholarly journals Post-operative meningeal thickening seen on magnetic resonance imaging

2021 ◽  
Vol 32 (2) ◽  
pp. 207-211
Author(s):  
Rafaela Queiroz de Morais ◽  
Rodrigo M. da Silva ◽  
Diogo G. Corrêa
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Low Grade ◽  
Leptomeningeal Dissemination ◽  
Resonance Imaging ◽  
Posterior Fossa Tumors ◽  
Neurosurgical Patients ◽  
Meningeal Dissemination ◽  
Magnetic Resonance Imaging Mri

Posterior fossa tumors are relatively common in children, and the meningeal dissemination of these tumors is well established in the literature. Although leptomeningeal dissemination is more common in high-grade tumors, even low-grade tumors can generate meningeal metastases. In this case report, we would like to discuss the importance of leptomeningeal dissemination assessment of posterior fossa tumors in children, in the preoperative period, through the entire neuroaxis magnetic resonance imaging (MRI). This is important since transient meningeal thickening is very common in the postoperative periods of neurosurgical patients, and can be found for up to 5 or 6 years after surgery, causing these patients to undergo prolonged follow-ups and repeated MRIs and lumbar punctures.

Audit of regional screening guidelines for vestibular schwannoma

1998 ◽  
Vol 112 (9) ◽  
pp. 860-864 ◽  
Author(s):  
P. J. D. Dawes ◽  
J.-P. Jeannon
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Vestibular Schwannoma ◽  
Acoustic Neuroma ◽  
Resonance Imaging ◽  
Posterior Fossa Tumour ◽  
Screening Guidelines ◽  
Magnetic Resonance Imaging Mri

AbstractAn audit of 334 patients who underwent magnetic resonance imaging (MRI) as investigation for a possible diagnosis of vestibular schwannoma was carried out to assess adherence to previously agreed screening guidelines. This represents one year's activity. A posterior fossa tumour was identified in 12 patients. Scan requests were judged to be inappropriate for 28 cases. The issues surrounding the screening for acoustic neuroma are discussed.

scholarly journals Nuclear magnetic resonance imaging of posterior fossa tumors

1983 ◽  
Vol 141 (3) ◽  
pp. 489-496 ◽  
Author(s):  
CP Randell ◽  
AG Collins ◽  
IR Young ◽  
R Haywood ◽  
DJ Thomas ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Nuclear Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Posterior Fossa Tumors ◽  
Nuclear Magnetic

Role of magnetic resonance imaging in diagnosis of pediatric posterior fossa tumors

2020 ◽  
Vol 33 (1) ◽  
pp. 326
Author(s):  
ShaimaaA.E. Fotoh ◽  
ZeinabA.E. Ali ◽  
RehabM Habib
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Resonance Imaging ◽  
Posterior Fossa Tumors

scholarly journals A discrepancy between clinical course and magnetic resonance imaging in a case of non-herpetic acute limbic encephalitis

2013 ◽  
Vol 5 (2) ◽  
pp. 8
Author(s):  
Naoto Kohno ◽  
Yuko Kawakami ◽  
Chizuko Hamada ◽  
Genya Toyoda ◽  
Hirokazu Bokura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Limbic Encephalitis ◽  
Time Lag ◽  
Pulse Therapy ◽  
Symptomatic Improvement ◽  
Low Grade ◽  
Resonance Imaging ◽  
Steroid Pulse ◽  
Magnetic Resonance Imaging Mri

We report the case of a 64-year old man who presented memory disturbance, low-grade fever, weight loss, and bilateral hand tremors for three months. He was diagnosed with non-herpetic acute limbic encephalitis (NHALE). Follow-up magnetic resonance imaging (MRI) revealed new lesions after symptomatic improvement following steroid pulse therapy. This may indicate that there is a time lag between the disturbance or recovery of neurons and astrocytes. Thus, other lesions might occasionally appear during convalescence in patients with NHALE, even if only minimal lesions were found on the initial MRI.

scholarly journals Classification on Magnetic Resonance Imaging (MRI) Brain Tumour using BPNN, SVM and CNN

2019 ◽  
Vol 8 (3) ◽  
pp. 8601-8607
Keyword(s):  
Neural Network ◽  
Magnetic Resonance Imaging ◽  
Image Segmentation ◽  
Magnetic Resonance ◽  
Brain Tumour ◽  
Support Vector ◽  
Low Grade ◽  
Resonance Imaging ◽  
Mri Brain ◽  
Magnetic Resonance Imaging Mri

In this works, the main objective is to detect the high grade gliomas (HGG) and low grade gliomas (LGG) from Magnetic Resonance Imaging (MRI) Brain Tumour images by applying the efficient image segmentation and classify among them. So hybrid image segmentation techniques applied in this work, first one is canny edge detection which is used to locate the boundary of the image and second is fuzzy c-mean clustering which is used to clubbed together of the similarity intensity value into clusters. Also further eight feature extracted using Intensity based Histogram and GrayLevel Co-occurrence Matrix (GLCM). Now three classifiers learning algorithm applied in this system, first one is backpropogation neural network (BPNN) which consists of multi-layer perceptrons to solve the complex problem for the given inputs. Second one is convolution neural network (CNN) are the part of neural networks which have very effective in areas such as image recognition and image classification. Third is Support vector machine (SVM) which can be used for both classification and regression challenges. Each of one is evaluated performance based on different techniques. It found that SVM and CNN gives 88% accuracy for this work.

Discrepancy between Computed Tomography and Magnetic Resonance Imaging in a Case of Medulloblastoma

Neurosurgery ◽  
1985 ◽  
Vol 17 (3) ◽  
pp. 487-489 ◽  
Author(s):  
Michael D. Heafner ◽  
Luis Schut ◽  
Roger J. Packer ◽  
Derek A. Bruce ◽  
Larissa T. Bilaniuk ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Brain Stem ◽  
Posterior Fossa ◽  
Imaging Techniques ◽  
Signs And Symptoms ◽  
Brain Stem Glioma ◽  
Resonance Imaging ◽  
Computed Tomographic ◽  
Magnetic Resonance Imaging Mri

Abstract In a 2-year-old girl with signs and symptoms of a posterior fossa tumor, the computed tomographic scan showed what appeared to be a brain stem glioma. However, magnetic resonance imaging (MRI) demonstrated the lesion to be extrinsic to the brain stem. Posterior fossa exploration disclosed a medulloblastoma filling the 4th ventricle. This discrepancy in imaging techniques points out the usefulness of MRI in the evaluation and treatment of posterior fossa lesions.

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