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Chronic cerebrospinal venous insufficiency (CCSVI) is a vascular syndrome in which deoxygenated blood flow from the veins surrounding the brain and the spine is slowed or blocked in its return to the heart. Among the criteria adopted for CCSVI diagnosis, the detection of possible intermittently reversed (reflux) flow in deep cerebral veins and sinuses, is of major importance. However, conventional...
Volumetric blood flow measurements require the assessment of both the velocity distribution and the cross-sectional area of the vessel. Unfortunately several difficulties hamper such a measurement in standard approaches. A new dual beam method has been recently introduced in which the Doppler spectral symmetry is exploited to finely orientating the first beam at 90?? with respect to the flow, so that...
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