Ultrasound 3D imaging system

a 3d imaging and ultrasound technology, applied in the field of ultrasound medical imaging system, can solve problems such as image quality compromise, and achieve the effects of improving harmonic imaging, reducing the amount of third harmonic, and being less costly

Inactive Publication Date: 2012-07-12
TERATECH CORP
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Benefits of technology

[0015]The transmit circuit can generate either square waves or sinusoidal excitations. Square wave pulse generators are generally less costly than sinusoidal pulse generators, and the square wave pulsers are widely used in ultrasound imaging equipment. However a typical squ

Problems solved by technology

The power required to operate such systems has resulted in the use of an analog phase shif

Method used

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Embodiment Construction

[0066]The objective of the beamforming system is to focus signals received from an image point onto a transducer array. By inserting proper delays in a beamformer to wavefronts that are propagating in a particular direction, signals arriving from the direction of interest are added coherently, while those from other directions do not add coherently or cancel. For real-time three-dimensional applications, separate electronic circuitry is necessary for each transducer element. Using conventional implementations, the resulting electronics rapidly become both bulky and costly as the number of elements increases. Traditionally, the cost, size, complexity and power requirements of a high-resolution beamformer have been avoided by “work-around” system approaches. For real-time three-dimensional high-resolution ultrasound imaging applications, an electronically steerable two-dimensional beamforming processor based on a delay-and-sum computing algorithm is chosen.

[0067]The concept of an elec...

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Abstract

The present invention relates to an ultrasound imaging system in which the scan head includes a beamformer circuit that performs far field subarray beamforming or includes a sparse array selecting circuit that actuates selected elements. When using a hierarchical two-stage or three-stage beamforming system, three dimensional ultrasound images can be generated in real-time. The invention further relates to flexible printed circuit boards in the probe head. The invention furthermore relates to the use of coded or spread spectrum signalling in ultrasound imaging systems. Matched filters based on pulse compression using Golay code pairs improve the signal-to-noise ratio thus enabling third harmonic imaging with suppressed sidelobes. The system is suitable for 3D full volume cardiac imaging.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a continuation-in-part of U.S. application Ser. No. 12 / 570,856 filed Sep. 30, 2009, which is a continuation-in-part of International Application No. PCT / US09 / 56995 filed on Sep. 15, 2009, which is a continuation-in-part of U.S. application Ser. No. 12 / 286,555 filed on Sep. 30, 2008 and claims priority to U.S. Application No. 61 / 192,063 filed on Sep. 15, 2008 by Chiang et al., entitled: “Ultrasound 3D Imaging System.” This application also claims priority to U.S. application Ser. No. 11 / 474,098 filed Jun. 23, 2006 and of International Application No. PCT / US2007 / 014526 filed Jun. 22, 2007. The entire contents of the above applications are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]Medical ultrasound imaging has become an industry standard for many medical imaging applications. Techniques have been developed to provide three dimensional (3D) images of internal organs and processes using a two dimensi...

Claims

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Application Information

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IPC IPC(8): A61B8/14
CPCA61B8/08A61B8/565A61B8/14A61B8/4411A61B8/4472A61B8/4483A61B8/483A61B8/543G01S7/52079G01S7/5208G01S7/52082G01S7/52085G01S7/52095G01S15/8925G01S15/8927G01S15/8959G01S15/8961G01S15/8993G10K11/346A61B8/145A61B8/54A61B8/52A61B8/488A61B8/466A61B8/4488A61B8/4444A61B8/0883G01S15/8913
Inventor CHIANG, ALICEWONG, WILLIAMBROADSTONE, STEVEN
Owner TERATECH CORP
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