Signal Enhancement for Automatic Identification of Arterial Wall Echoes from an Intravessel Scanner
Techniques for automatic processing of echo information for determining vessel cross sectional area are described. The echo information is obtained from a catheter tip instrumented with a circumferential array of transducer elements. variation in the amplitude of echoes received and frequent appearance of multiple echoes pose wall echo identification problems. Four processing strategies have been implemented to overcome these problems: (1) ensemble integration; (2) adaptive setting of the number of ensemble integrations performed for each transducer scanned; (3) echo video integration; and (4) adaptive threshold crossing detection. Each of these methods has proven useful in overcoming particular problems.
KeywordsAutomatic Identification Adaptive Threshold Bottom Trace Coherent Integration Adaptive Detection
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