Adaptive cancellation of ring-down artifact in IVUS imaging
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United States of America Patent
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Jul 3, 2001
Grant Date -
N/A
app pub date -
Jul 25, 2000
filing date -
Oct 2, 1998
priority date (Note) -
In Force
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Importance
Abstract
In an intravascular ultrasonic (IVUS) imaging system ring-down artifact is reduced or eliminated by dynamically enhancing the ring-down over a plurality of scans, determining the ring-down range by keying on a ring-down-to-blood transition characterized by a rapid change from high amplitude to low amplitude echoes, and using a spectral pattern for a single or several A-scans within the ring-down range, using for example an FFT analysis, as the basis of selectively filtering current or subsequent images using the recently computed ring-down pattern.
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