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A medical device which allows imaging of the distribution of conductivity in 3D in regions below the skin surface has been developed and tested. Its purpose is to enable early detection and preliminary diagnosis of breast tumours. Design of the measuring system and software are described. Results of clinical evaluation of the system are presented. EIT(More)
Recently, a novel leukoencephalopathy syndrome was described in eight patients with a distinct pattern of MRI abnormalities. Here we describe the clinical, laboratory, and MRI findings in five new, unrelated patients. The clinical picture was homogeneous with onset in childhood, a slowly progressive course, variable mental deficits, signs of pyramidal and(More)
Bioelectrical (EEG) and hemodynamic (fMRI responses) reactions of the brain to motor tasks for the right and left hands and imaginary performance of those tasks were studied in 15 healthy right-handed subjects (21–39 years old). In real movements, the main fMRI response was recorded in the central gyri of the contralateral (to the working hand) hemisphere.(More)
Bioelectrical (EEG) and hemodynamic (fMRI) responses of cerebral reactions to active and passive movements by the right hand were analyzed in 17 right-handed healthy persons. Individual and averaged fMRI and EEG data was analyzed. The main cortex fMRI responses (sensorimotor cortex of the contralateral, left hemisphere) were topographically similar during(More)
Functional magnetic resonance imaging (fMRI) was used to study the variation of functional changes that arise in the brain in response to similar tests in healthy subjects. The approach was assumed to demonstrate diverse individual strategies of achieving the same external (behavioral) response via different brain mechanisms and to identify the factors(More)
Advances in magnetic resonance in medicine during the last decade have opened up new opportunities for application of diffusion-weighted magnetic resonance imaging in brain microstructure assessment. Conventional diffusion-tensor magnetic resonance imaging is based on the Gaussian diffusion model. However, presence of multiple cells, cell membranes and(More)
OBJECTIVE Surgical resection of deep-seated midline brain tumors does not always resolve obstruction of cerebrospinal fluid pathways, and an additional operation--ventricular shunting--is required. To prevent postoperative obstructive hydrocephalus, we combine tumor removal and internal ventricular shunting in 1 stage. METHODS Between 2000 and 2006, 82(More)
The contrasting agent Gd-DTPA (Magnevist, Schering AG, Germany) was tested when used in magnetic resonance tomography using extra-low (0.04 T) magnetic field intensity in 68 patients with various brain and spine tumors. The agent was injected intravenously in a dose of 0.1 mmol/kg. No complications were found. The tests showed its high efficiency in the(More)
Angiographic studies have demonstrated improved visibility of glial tumors after hyperventilation. The present study was undertaken to determine whether hyperventilation would change the MR enhancement characteristics of various glial tumors. Eighteen patients were studied twice: once with standard contrast-enhanced MR imaging and again with standard(More)