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Noninvasive Estimation of Intravascular Pressure Changes Using Vector Velocity Ultrasound (US)

A blood vessel and acceleration technology, applied in the field of non-invasive estimation, can solve problems such as unreliability and sensitivity to hemodynamic factors

Active Publication Date: 2021-03-16
B K MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this renders the method sensitive to hemodynamic factors unrelated to the effect of constricted vessels on peak velocity (e.g. abnormal cardiac output)
This method has been found to be unreliable in the literature

Method used

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  • Noninvasive Estimation of Intravascular Pressure Changes Using Vector Velocity Ultrasound (US)
  • Noninvasive Estimation of Intravascular Pressure Changes Using Vector Velocity Ultrasound (US)
  • Noninvasive Estimation of Intravascular Pressure Changes Using Vector Velocity Ultrasound (US)

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Embodiment Construction

[0021] A non-invasive method for estimating intravascular pressure changes from ultrasound imaging data is generally described below. In one example, the method estimates the pressure gradient from a 2D or 3D vector velocity field. The change in pressure is then derived using a model based on, for example, the Navier-Stokes formula and / or other formulas.

[0022] initial reference figure 1 , an example ultrasound imaging system 100 is illustrated.

[0023] The transducer array 102 includes a plurality of transducer elements configured to transmit ultrasound signals and receive echo signals. Examples of suitable one-dimensional (1D) arrays include arrays having numbers of transducer elements of 8, 16, 32, 64, 96, 128, 512, etc. Other numbers and / or dimensions of elements (eg, two-dimensional or 2D) are also contemplated herein. The array 102 may be linear, curvilinear, and / or otherwise shaped. The transducer array 102 may be fully populated or sparse and / or combinations th...

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Abstract

A method for determining a pressure gradient using ultrasound data includes acquiring ultrasound data of a blood vessel and using the ultrasound data to generate a velocity vector profile for flow in the blood vessel. The method also includes calculating acceleration using the velocity vector profile. The acceleration includes at least a temporal acceleration, and calculating the temporal acceleration includes reducing noise from the velocity vector profile and determining the temporal acceleration from the denoised velocity data. The method also includes determining the pressure gradient using the calculated acceleration. The method also includes displaying an ultrasound image of the blood vessel with a marker indicative of the pressure gradient superimposed thereon.

Description

technical field [0001] The present invention relates generally to ultrasound imaging, and more particularly to noninvasive estimation of intravascular pressure changes using velocity vector ultrasound (US). Background technique [0002] Abnormal changes in intravascular blood pressure are already indicative of diseased blood vessels. The literature states that measured pressure changes have been used clinically as diagnostic markers when assessing the physiological state of the cardiovascular region. Intravascular pressure can be determined by inserting a pressure-sensing wire or catheter into the femoral artery and threading it to the region of interest. Such procedures are invasive and require the use of ionizing radiation for the guidance of pressure sensing devices. Unfortunately, invasive procedures leave patients susceptible to infection, bleeding, etc., and ionizing radiation can damage or kill cells. Furthermore, the literature has pointed out that the accuracy wi...

Claims

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Application Information

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IPC IPC(8): A61B8/04A61B8/06A61B8/08
CPCA61B5/021A61B8/04A61B8/06A61B8/0883A61B8/0891A61B8/488A61B8/5223G01F1/66G01S15/8984
Inventor J·奥勒森J·A·詹森C·A·比利亚戈麦斯-霍约斯
Owner B K MEDICAL