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Spread spectrum coded waveforms in ultrasound imaging

A technology of acoustic imaging and waveform, applied in the field of ultrasound imaging, can solve the problems of limited clinical application, spatial resolution and disappointing image quality of tissue differentiation

Active Publication Date: 2014-11-26
DECISION SCI INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Several factors, including inappropriate spatial resolution and tissue differentiation, can lead to disappointing image quality when using conventional techniques of ultrasound imaging, which may limit its use for many clinical applications

Method used

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  • Spread spectrum coded waveforms in ultrasound imaging
  • Spread spectrum coded waveforms in ultrasound imaging
  • Spread spectrum coded waveforms in ultrasound imaging

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Embodiment Construction

[0019] This document describes techniques, systems and devices for generating, transmitting, receiving and processing coherent, spread spectrum, frequency and / or phase encoded waveforms for use in ultrasound imaging. Ultrasound imaging can be performed by emitting time-gated, single-frequency or narrow temporal-band acoustic waveforms (pulses) that are partially reflected and partially transmitted from a boundary between two media (eg, a biological tissue structure). This reflection may depend on the difference in acoustic impedance between the two media. Some techniques of ultrasound imaging may only use amplitude information from the reflected signal. For example, when a pulse is transmitted, the reflected signal can be sampled continuously. In biological tissue, the speed of sound can be considered to be fairly constant, where the time between transmission of a waveform and reception of a reflected signal depends on the distance traveled by the waveform in that tissue stru...

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Abstract

Techniques, systems, and devices are disclosed for ultrasound imaging using spread spectrum, coherent, frequency- and / or phase-coded waveforms. In one aspect, a method of creating an image from an acoustic waveform in an acoustic imaging device includes setting the device into a transmit mode to transmit an acoustic waveform toward a target, in transmitting the acoustic waveform, synthesizing, in one or more waveform synthesizers, a plurality of substantially orthogonal coded waveforms that form a composite waveform as the transmitted acoustic waveform toward the target, in which each waveform corresponds to a distinct frequency band, setting the device into a receive mode to receive a returned acoustic waveform that returns from at least part of the target, converting the received returned acoustic waveform from analog format to digital format as a received composite waveform comprising information of the target, and processing the received composite waveform to produce an image of the target.

Description

[0001] Cross reference to related applications [0002] This patent document claims priority to U.S. Provisional Application No. 61 / 553,137, filed October 28, 2011, entitled SPREAD SPECTRUM CODED WAVEFORMS IN ULTRA-SOUND IMAGING, by References are incorporated as part of this document. technical field [0003] This patent document relates to ultrasound imaging. Background technique [0004] Ultrasonic imaging is an imaging form that uses the property of sound waves passing through media to reproduce intuitive images. As an imaging modality, ultrasound imaging has been used for decades in a variety of biomedical fields to view the internal structure and function of animals and humans. Ultrasound waves used in biomedical imaging can operate in different frequencies, eg, between 1 and 20 MHz, or even in higher frequencies. Several factors, including inappropriate spatial resolution and tissue differentiation, can lead to disappointing image quality when using conventional te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/89A61B8/00
CPCG01S15/8959A61B8/4488A61B8/54G01S7/52047G01S15/8979G01S7/5202A61B8/145A61B8/5207G01S15/8952G01S7/52071G01S15/8915G01S15/8927A61B8/4483A61B5/725A61B8/4494A61B8/463A61B8/467A61B8/488A61B8/5223
Inventor A.韦格纳
Owner DECISION SCI INT CORP
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