Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-09-22
1999-06-08
Jaworski, Francis J.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
A61B 800
Patent
active
059101156
ABSTRACT:
A method and apparatus for improving medical ultrasound images employs data-dependent filtering. A quantity, called the coherence factor, is calculated for each pixel in the image. The coherence factor is defined to be the ratio of two quantities: the amplitude of the receive signals summed coherently and the amplitude of the receive signals summed incoherently. The coherence data is stored in buffer memory and is optionally spatially filtered and mapped. The amplitude data is concurrently acquired and stored in buffer memory. The system can be selectively operated to display the coherence information alone, the amplitude information alone, or a combination of the coherence and amplitude information.
REFERENCES:
patent: 5476098 (1995-12-01), O'Donnell
Reiter et al., "A Semblance-Guided Median Filter", Geophys. Prospect., vol. 51, pp. 15-41 (1993).
Szabo et al., "Velocity Guided Median Filtering Applications To Ultrasonic Imaging", 23rd International Symposium of Acoustical Imaging, Boston, MA, Apr. 13-16, 1997. Printed by Brattleboro Printing, Inc., 11 Elm St., Brattleboro, VT 05303-248.p.
General Electric Company
Jaworski Francis J.
Johnson Noreen C.
Stoner Douglas E.
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