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(12) United States Patent
Torp et al.
(io) Patent No.: US 6,277,075 Bl (45) Date of Patent: Aug. 21,2001
(54) METHOD AND APPARATUS FOR
VISUALIZATION OF MOTION IN
ULTRASOUND FLOW IMAGING USING
CONTINUOUS DATA ACQUISITION
(75) Inventors: Hans Garmann Torp; Steinar
Bjaerum, both of Trondheim (NO)
(73) Assignee: GE Medical Systems Global Technology Company, LLC,
Waukesha, WI (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/449,389
(22) Filed: Nov. 26, 1999
(51) Int. C I. A61B 8/00
(52) U.S. CI 600/443; 600/447
(58) Field of Search 600/443, 444,
600/447, 448, 449, 455
(56) References Cited
U.S. PATENT DOCUMENTS
4,888,694 12/1989 Chesarek 364/413.24
5,669,387 * 9/1997 Mine 600/447
5,701,897 * 12/1997 Sano 600/443
6,132,376 * 10/2000 Hossack et al 600/443
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Newhouse et al., "Ultrasound Doppler probing of flows transverse with respect to beam axis," IEEE Trans. Biomed. Eng., vol. 34, No. 10, pp. 779-789, Oct. 1987. Trahey et al., "Angle independent ultrasonic detection of blood flow," IEEE Trans. Biomed. Eng., vol. 34, No. 12, pp. 965-967, Dec. 1987.
Jensen et al., "A new method for estimation of velocity vectors," IEEE Trans. Ultrason., Ferroelect., Freq. Contr., vol. 45, No. 3, pp. 837-851, May 1998. Anderson, "Multi-dimensional velocity estimation with ultrasound using spatial quadrature," IEEE Trans. Ultrason., Ferroelect., Freq. Contr., vol. 45, No. 3, pp. 852-861, 1998.
* cited by examiner
Primary Examiner—Marvin M. Lateef
Assistant Examiner—Maulin Patel
(74) Attorney, Agent, or Firm—Christian G. Cabou; Dennis M. Flaherty
A method and an apparatus for imaging blood motion by displaying an enhanced image of the fluctuating speckle pattern. A continuous stream of data frames, each the result of one scan, is available for processing. For each position in the scan plane, a respective time sequence of signal samples is available for processing. The first step in the blood motion image processing is high-pass filtering of this signal. Following the high-pass filter, a speckle signal is formed, e.g., by calculating the squared magnitude (i.e., power) of the high-pass-filtered signal (I/Q or RF). The resulting speckle signal can then undergo a nonlinear amplitude transformation to form a blood motion imaging signal for display.
32 Claims, 6 Drawing Sheets