IP Library › Granted Patent US 12,426,855
Granted Patent B2
US 12,426,855 · App. 16/877,445 · Granted Sep 30, 2025

Ultrasound imaging using apparent point-source transmit transducer

Inventors: Donald F. Specht (Los Altos, CA); Josef R. Call (Campbell, CA)
Assignee: Maui Imaging, Inc.
A61B8/4483G01S7/52077G01S7/52079G01S15/8913G01S15/8915G01S15/8929G01S15/8993G01S15/8997A61B8/4461A61B8/483A61B8/5207G01S15/8995
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Quick Facts
Patent No.
US 12,426,855
App. No.
16/877,445
Granted
Sep 30, 2025
Kind
B2
Abstract

An apparent point-source transmit transducers comprises a substantially constant-thickness shell of piezoelectric material in a shape of a spherical-section. Such transducers may be sized such that a single apparent point-source transmit transducer may produce ultrasound waveforms with substantial energy in a medium to be imaged. Use of such transducers in three-dimensional ping-based imaging may permit deeper and higher quality imaging than may be possible with conventional transducers.

Claims (12)

1. An ultrasound probe comprising:

A three-dimensional spherically-shaped transmit array comprising one or more omnidirectional transmit transducer elements, the omnidirectional transmit transducer elements being configured to transmit a three-dimensional ultrasound wavefront to insonify a region of interest with a point source location that appears to have originated from an apparent point source that lies somewhere other than a surface of the transmit array;

a first receive array comprising a plurality of omnidirectional receive transducer elements, the first receive array configured to receive echoes of the three-dimensional ultrasound wavefront from one or more scatterers within the region of interest; and

beamforming electronics configured to produce a three-dimensional sub-image of the one or more scatterers within the region of interest from received echoes at each of the plurality of omnidirectional receive transducer elements based on a transmission time of the three-dimensional ultrasound wavefront from the point source location to the one or more scatterers and to the plurality of omnidirectional receive transducer elements, the transmission time accounting for a distance between the apparent point source and the surface of the transmit array, the beamforming electronics being further configured to coherently combine the three-dimensional sub-images to form a three-dimensional image of the one or more scatterers within the region of interest, the three-dimensional image having improved image quality relative to the three-dimensional sub-images.

2. The ultrasound probe of claim 1 , further comprising a second receive array comprising a second plurality of omnidirectional receive transducer elements wherein the second receive array is physically separate and distinct from the first receive array.

3. The ultrasound probe of claim 1 , further comprising a second receive array comprising a second plurality of omnidirectional receive transducer elements, wherein the first receive array and the second receive array are located adjacent to one another on a continuous array.

4. The ultrasound probe of claim 1 , wherein a total aperture of the first receive array is at least twice a coherence width of the region of interest.

5. The ultrasound probe of claim 1 , wherein a total aperture of the first receive array is at least three times a coherence width of the region of interest.

6. The ultrasound probe of claim 1 , wherein the transmit array has a width ranging between 8 cm to 10 cm.

7. The ultrasound probe of claim 1 , wherein the one or more omnidirectional transmit transducer elements are spherically cap-shaped.

8. The ultrasound probe of claim 7 , wherein the one or more omnidirectional transmit transducer elements are convex.

9. The ultrasound probe of claim 7 , wherein the one or more omnidirectional transmit transducer elements are concave.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 8, 2022
From: SPECHT, DONALD F.; CALL, JOSEF R.
To: MAUI IMAGING, INC.
Reel/Frame 059199/0822 →
Continuity (5)
Division 16137221 · Sep 20, 2018
Continuation 15888738 · Feb 5, 2018
Division 14279052 · May 15, 2014
Provisional Application 61877555 · Sep 13, 2013
Related Publication 20200275910A1 · Sep 3, 2020
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