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Microemboli Detection by Transcranial Doppler Ultrasound Mikroembólia-detektálás

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Abstract

Cerebral embolism is the main cause of ischemic stroke. Consequently, the detection and prevention of embolic events is critical to reducing the burden of stroke. Emboli may cause either large disabling strokes or small subclinical events, depending on the size and eventual location of the embolus. Emboli generated from the chambers or valves of the heart or from atherosclerotic plaques in the arteries of the neck are variable in their size and consistency. Embolus detection using transcranial Doppler ultrasound (TCD) allows for the identification of active embolic sources in stroke-prone individuals and the selection of high-risk patients for appropriate treatment. The large number of patients at risk and the time and manpower needed for TCD-based embolus detection led to the development of various systems for semi-automatic or automatic microembolic signal (MES) evaluation. Cerebral embolus monitoring systems suitable for routine clinical use must have the ability to automatically recognize high intensity transient signals and differentiate between artifacts and emboli. Additional information is needed about MES, mainly on their size, composition and nature (solid or gaseous). Without an automated embolic signal detection system that is as effective as the huma

Year: 2014
OAI identifier: oai:CiteSeerX.psu:10.1.1.418.6302
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