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Multipulse elastography method

An elastography, multi-pulse technology, applied in ultrasound/sonic/infrasound image/data processing, medical science, diagnosis, etc., can solve the problem of inability to accurately adjust the frequency components of tissue displacement

Active Publication Date: 2015-02-25
ECHOSENS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the displacement of the tissue, especially its frequency content, cannot be precisely adjusted by adjusting the ultrasonic emission parameters.

Method used

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Embodiment Construction

[0033] figure 1 A block diagram showing the steps of the multi-pulse elastography method 100 according to the present invention.

[0034] The multi-pulse elastography method 100 basically comprises a step 101 of determining properties of at least two low-frequency mechanical pulses. In this embodiment, at least one characteristic of each mechanical impulse determined is different.

[0035] Without limitation, a mechanical pulse can be characterized by center frequency, amplitude, cycle number and / or time profile.

[0036] Therefore, when implementing this determination step 101, the operator can determine, for example, the time curve of the first pulse with a sloped line, the time curve of the second pulse with a sinusoidal apodization, the time curve of the third pulse with a square pulse, the time curve of the fourth three pulses, Gaussian time curve and sinusoidal time curve of the fifth three pulses.

[0037] As an example, a sinusoidal time curve can be determined acco...

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Abstract

The invention relates to a multipulse elastography method (100) for quantitatively measuring at least one mechanical property of a viscoelastic medium having an ultrasonic signal after ultrasonic illumination, said method (100) comprising the following steps: defining (101) the characteristics of at least two mechanical pulses; generating (102) said at least two mechanical pulses in a viscoelastic medium; monitoring (103) the propagation, in said viscoelastic medium, of the at least two shearing waves from said at least two mechanical pulses by means of the transmission and acquisition of ultrasonic signals; and calculating (104) at least one mechanical property of said viscoelastic medium by means of said acquisitions of said ultrasonic signals.

Description

technical field [0001] The invention relates to a multi-pulse elastic imaging method, which is used for quantitatively measuring at least one mechanical property of a viscoelastic medium emitting ultrasonic signals after being irradiated by ultrasonic waves. In one non-limiting application, the present invention relates to a multi-pulse elastography method for quantitatively measuring the elasticity and viscosity of human or animal organs such as liver tissue. Background technique [0002] A method is known for simultaneously observing the propagation of low frequency shear pulse waves at multiple points in a diffuse viscoelastic medium. To this end, it is necessary to emit ultra-high-speed compressed ultrasonic waves in order to obtain a series of medium measurement values, and then delay or even real-time process the obtained measurement values ​​to determine the motion of the medium when the shear wave propagates. [0003] Patent application FR2843290 describes a device ...

Claims

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Application Information

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IPC IPC(8): G01S7/52A61B8/08
CPCA61B8/485G01S7/52046G01S7/52042A61B8/5207A61B8/5223
Inventor 洛朗·桑德兰塞西尔·巴斯塔尔
Owner ECHOSENS SA
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