For many years, radiofrequency-generated lesions have been used for the treatment of pain and abnormal movements. However, the reliability of this method has been questioned because of the variation in the size of lesions produced by the electrode at different times and temperatures. A 500-kHz radiofrequency generator with different electrodes was used to… (More)
BACKGROUND von Recklinghausen's neurofibromatosis is a hereditary disease that may affect any organ or system of the body primarily or secondarily, including the vascular system. Among the rare cerebrovascular abnormalities, the most common is stenosis or occlusion of the cerebral artery. Intracranial aneurysms are uncommon. CASE DESCRIPTION A case of an… (More)
OBJECTIVE To analyse the imaging and clinical prognostic indicators for early hematoma enlargement after spontaneous intracerebral hemorrhage (ICH). METHODS In 126 patients, spontaneous ICH was diagnosed by computed tomography (CT) within 4 hours of disease onset. Repeat CT was performed after 24 hours to detect the development of hematoma enlargement. A… (More)
OBJECTIVE The aim of this study was to evaluate the value of intraoperative ultrasound (IOUS) in neurological operations. PATIENTS AND METHODS IOUS was applied in 110 operations, involving 68 gliomas, 7 meningiomas, 1 acoustic neuroma, 5 hemangioblastomas, 3 granulomas, 17 AVMs and 9 cavernous angiomas. A color Doppler model was used to display the blood… (More)
In this paper we present the hardware design of an extremely compact and novel digital stochastic neuron, that has the ability to generate the derivative of its output with respect to an arbitrary input. These derivatives may be used to form the basis of an on chip gradient descent learning algorithm.