High frame rate pulse inversion harmonic ultrasonic diagnostic imaging system
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Feb 17, 1999
filing date -
Feb 17, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ultrasonic diagnostic imaging system and method are provided for producing harmonic ultrasonic images at high line densities or frame rates of display. Scanlines are received from spatially adjacent fundamental frequency transmit beams of opposite phase or polarity. The received scanlines are summed on a spatially consistent basis to produce image lines of separated harmonic echo signals intermediate the adjacent scanlines. The received scanlines may be subtracted, or the polarity of alternately received scanlines inverted, to produce image lines of separated linear (fundamental frequency) echo signals. In preferred embodiments the received scanlines are combined by filter functions which reduce or eliminate artifacts which otherwise arise from the scanline combining process.
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