IP Library › Granted Patent US 12,471,887
Granted Patent B2
US 12,471,887 · App. 18/516,539 · Granted Nov 18, 2025

Motion detection using ping-based and multiple aperture doppler ultrasound

Inventors: Donald F. Specht (Los Altos, CA); Kenneth D. Brewer (Santa Clara, CA); David M. Smith (Lodi, CA); Josef R. Call (Campbell, CA); Viet Nam Le (San Jose, CA); Bruce R. Ritzi (Sunnyvale, CA)
Assignee: Maui Imaging, Inc.
A61B8/488A61B8/4444A61B8/4488A61B8/5207G01S15/8913G01S15/8927G01S15/8984A61B8/145A61B8/4477A61B8/463G01S7/52066G01S7/52071
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Quick Facts
Patent No.
US 12,471,887
App. No.
18/516,539
Granted
Nov 18, 2025
Kind
B2
Abstract

A method of full-field or “ping-based” Doppler ultrasound imaging allows for detection of Doppler signals indicating moving reflectors at any point in an imaging field without the need to predefine range gates. In various embodiments, such whole-field Doppler imaging methods may include transmitting a Doppler ping from a transmit aperture, receiving echoes of the Doppler ping with one or more separate receive apertures, detecting Doppler signals and determining the speed of moving reflectors. In some embodiments, the system also provides the ability to determine the direction of motion by solving a set of simultaneous equations based on echo data received by multiple receive apertures.

Claims (12)

1 . A method of conducting Doppler ultrasound comprising:

transmitting a first single unfocused ultrasound signal into a target object with a transmit aperture of an ultrasound probe;

receiving echoes of the first single unfocused ultrasound signal with first and second receive apertures of the ultrasound probe;

computing adjustment factors for a first acoustic path to the first receive aperture and a second acoustic path to the second receive aperture;

detecting motion of a plurality of reflectors in at least two separate regions of the target object from the echoes of the first single unfocused ultrasound signal; and

calculating speeds of the plurality of reflectors based on the adjustment factors.

2 . The method of claim 1 , further comprising wherein the first and second receive apertures are distinct from the transmit aperture.

3 . The method of claim 1 , further comprising: beamforming the received echoes to determine a display position for each of a plurality of reflectors within a region of interest containing the target object.

4 . The method of claim 1 , the detecting motion step further comprising: detecting a Doppler frequency shift of at least one pixel within the received echoes of the first single unfocused ultrasound signal.

5 . The method of claim 1 , wherein the selecting transmitting and receiving steps are performed without a pre-defined range gate for the first single unfocused ultrasound signal.

6 . The method of claim 3 , wherein the beamforming step is performed before the detecting step.

7 . The method of claim 3 , wherein the beamforming step is performed after the detecting step.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 21, 2023
From: SPECHT, DONALD F.; BREWER, KENNETH D.; SMITH, DAVID M.; CALL, JOSEF R.; LE, VIET NAM; RITZI, BRUCE R.
To: MAUI IMAGING, INC.
Reel/Frame 065639/0957 →
Continuity (5)
Continuation 16298767 · Mar 11, 2019
Continuation 13690989 · Nov 30, 2012
Provisional Application 61691717 · Aug 21, 2012
Provisional Application 61565796 · Dec 1, 2011
Related Publication 20240081787A1 · Mar 14, 2024
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