Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-04-23
2000-06-13
Kamm, William E.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600447, 600441, A61B 800
Patent
active
060743484
ABSTRACT:
A method and apparatus for ultrasonically imaging flow directly in B mode employs a sequence of pulses transmitted to a transmit focal position, with the backscattered signals from this sequence being filtered to remove echoes from stationary or slow-moving reflectors along the transmit path. The resulting flow signals are superimposed on a conventional B-mode vector and displayed. A B-mode flow image is formed by repeating this procedure for multiple transmit focal positions across the region of interest. The filtering is performed in slow time (along transmit firings) using a high-pass "wall" filter (e.g., an FIR filter) with harmonic image feed-through and optionally B-mode (fundamental) feed-through. The resulting B-mode flow image has low clutter from stationary or slow-moving tissue or vessel walls, high resolution, high frame rate and flow sensitivity in all directions.
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Chiao Richard Yung
Hall Anne Lindsay
Rigby Kenneth Wayne
Thomenius Kai Erik
Washburn Michael Joseph
General Electric Company
Imam Ali M.
Kamm William E.
Snyder Marvin
Stoner Douglas E.
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