Ultrasonic technique for assessing wall vibrations in stenosed blood vessels

A narrow, ultrasound data technology, applied in ultrasound/acoustic/infrasonic diagnosis, application, cardiac catheterization, etc., can solve problems such as inability to analyze disturbance information

Inactive Publication Date: 2007-08-22
WASHINGTON STATE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these criteria are already quite useful, this technique cannot analyze the perturbation information present in the wall vibration spectrum

Method used

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  • Ultrasonic technique for assessing wall vibrations in stenosed blood vessels
  • Ultrasonic technique for assessing wall vibrations in stenosed blood vessels
  • Ultrasonic technique for assessing wall vibrations in stenosed blood vessels

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Embodiment Construction

[0091] The figures and disclosed embodiments are non-limiting

[0092] Exemplary embodiments are shown in the reference figures of the drawings. It is intended that the embodiments and figures disclosed herein should be considered as illustrative rather than restrictive.

[0093] tissue vibration imaging system

[0094] FIG. 1 is a block diagram illustrating an ultrasound system 10 that is generally similar to conventional ultrasound systems, but that has been modified to include imaging of tissue vibrations and thus can be used to practice the principles disclosed herein. The ultrasound system 10 includes an ultrasound transducer 12 that transmits a signal modulated with a number of cycles (ie, 2-20 cycles) at a carrier frequency of typically 1 MHz-15 MHz. The transmitted signal is reflected by scatterers (not shown) along the beam path and received after a time delay whose duration depends on the distance scattered from the transducer. In the acquisition phase, the aco...

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Abstract

A real-time signal processing technique for ultrasonic imaging of tissue vibrations for localizing the source of a bruit in a 2D image with respect to the anatomy and/or for obtaining simultaneous information about vibrations and the underlying blood flow. The bruit can be quantitatively assessed using an ensemble of ultrasound echoes. Signal processing enables estimation of wall displacement and the display of time-resolved vibration spectrum. Vibrations are detected and color-coded according to their amplitude and frequency and overlaid on the B-mode and/or color-flow image in real time. Proposed vibration imaging algorithms use data acquired during conventional ultrasonic color-flow imaging and the clutter signal, normally suppressed in color-flow imaging, to detect and characterize tissue vibrations. Three vibration imaging algorithms based on parametric modeling of vibrations and other criteria distinguish between clutter, blood flow, and vibrations. The techniques are usable to detect, locate, image, and quantitatively grade stenoses in blood vessels.

Description

[0001] government rights [0002] This invention was made, at least in part, under a license from the United States Office of Naval Research (grant number N00014-01-G-0460), and the United States Government may have certain rights in the invention. Background technique [0003] For more than two centuries, arterial narrowing has been associated with audible sounds called bruits with a stethoscope. Auscultation (passive listening with a stethoscope) is routinely used to qualitatively assess the loudness and pitch of murmurs and rustles of many vascular diseases such as renovascular hypertension, coronary artery disease, peripheral arterial disease and internal bleeding. [0004] It has been determined that the vascular sounds associated with stenosis, aneurysm, arteriovenous fistula, and pseudoaneurysm are produced by the forces exerted on the vessel wall by the eddy currents created as blood flows through a narrowed orifice from an area of ​​high pressure to an area of ​​low p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/00
CPCA61B5/02007G01S7/52036A61B8/08G01S15/8981G01S7/52026A61B5/7257G01S7/52034G01S7/52071A61B8/00A61B8/02
Inventor K·比奇Y·金S·西克达
Owner WASHINGTON STATE UNIVERSITY
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