Subcortical frontal lesions on MRI in patients with motor neurone disease

MRI was performed in 32 patients with motor neurone disease (26 men and 6 women, aged 40-77 years) and in a control group of 21 subjects. Of the patients studied, 19 had definite and 11 probable amyotrophic lateral sclerosis (ALS) and two had progressive bulbar palsy. In 10 patients there were asymmetrical bilateral foci of increased signal intensity on proton-density and T-2-weighted images, confined to the white matter. Two patients had only cortical frontal atrophy and slightly increased ventricular size, whereas 20 had normal MRI. The focal lesions were not confined to corticospinal tracts, but were also observed in subcortical frontal areas. While the lesions along the corticospinal tracts correspond to pyramidal tract degeneration, the subcortical foci correlate with degeneration of the frontal bundles and indicate generalised involvement of the central nervous system

Real-time arm gesture recognition using 3D skeleton joint data

In this paper we present an approach towards real-time hand gesture recognition using the Kinect sensor, investigating several machine learning techniques. We propose a novel approach for feature extraction, using measurements on joints of the extracted skeletons. The proposed features extract angles and displacements of skeleton joints, as the latter move into a 3D space. We define a set of gestures and construct a real-life data set. We train gesture classifiers under the assumptions that they shall be applied and evaluated to both known and unknown users. Experimental results with 11 classification approaches prove the effectiveness and the potential of our approach both with the proposed dataset and also compared to state-of-the-art research works. © 2019 by the authors

MRI in the investigation of patients with myelopathy thought to be due to multiple sclerosis

The role of cerebral and spinal cord MRI was investigated in 65 patients with myelopathy suspected of having demyelinating disease. Cerebral MRI demonstrated lesions compatible with demyelination in 80% and spinal cord MRI in 68.6%. In 28.5% of our patients brain lesions were present with normal spinal cord images, but in 17% spinal cord lesions were depicted with a normal brain MRI. The combination of the two examinations demonstrated lesions in 97% of the patients. The frequency of coexistent cerebral lesions in patients with spinal cord lesions was over 85% in patients with chronic disease but only 28.5% in patients with acute myelitis. © 1995 Springer-Verlag

Real-Time Detection of the Ground Level Enhancement on 10 September 2017 by A.Ne.Mo.S.: System Report

On 10 September 2017, a ground level enhancement (GLE) of cosmic ray intensity, identified as GLE72, was recorded by several stations of the worldwide neutron monitor network provided by the high-resolution Neutron Monitor Database. The solar proton event that resulted in this GLE was associated with active region AR2673, which produced an X8.2 flare on the solar west limb. Protons were measured by the GOES satellites with energies above 10, 50, and 100 MeV, while particles at higher energies above 500 MeV were registered by ground-based neutron monitors. This GLE event was successfully detected in real time by the GLE Alert plus System of the Athens Neutron Monitor Station (A.Ne.Mo.S.). In this work an overview of the GLE72 event is given, and a detailed analysis of the evolution of the GLE Alert signal issued by the GLE Alert plus System as well as a postevent summary are presented. ©2018. American Geophysical Union. All Rights Reserved

CORRELATION BETWEEN SPINAL-CORD MRI AND CLINICAL-FEATURES IN PATIENTS WITH DEMYELINATING DISEASE

Localisation of spinal cord lesions by MRI was correlated with neurological symptoms and signs in 16 patients with clinical and laboratory evidence of multiple sclerosis. There was good correspondence between spinal cord lesions and motor tract signs. On the other hand, superficial or deep sensory disturbances correlated with spinal cord lesions in only about a quarter of the patients. MRI of the spinal cord appeared to explain the myelopathy in 11 patients, while in 3 there was strong clinical evidence of more extensive demyelinating lesions. In 7 of the 16 patients MRI of the brain was normal