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Ultrasonic diagnosis system

An ultrasonic diagnosis, ultrasonic technology, applied in the direction of sonic diagnosis, infrasound diagnosis, diagnosis, etc., can solve problems such as intractable processing, spatial correlation processing cost calculation, etc., to achieve the effect of solving aliasing

Inactive Publication Date: 2009-09-16
HITACHI HEALTHCARE MFG LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, unlike conventional ultrasound diagnosis, the spatial correlation method has the disadvantage that spatial correlation processing consumes a lot of computation, making it difficult to process in real time.

Method used

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Embodiment Construction

[0045] An ultrasonic diagnostic system according to an embodiment of the present invention will be described below with reference to the drawings. The ultrasonic diagnostic system according to the present invention adopts a method called "extended combined autocorrelation method", wherein the one-dimensional detection processing using the combined autocorrelation method through one-dimensional window and performing correlation calculation from the envelope signal is extended as , through the two-dimensional correlation window, using two-dimensional detection, to deal with the displacement in the horizontal direction. In addition, using the extended combined autocorrelation method according to the embodiment, the envelope correlation calculation is performed only for the grid points whose axial spacing is half of the ultrasonic wavelength and horizontal spacing is the beam-line pitch (beam-line pitch), so as to reduce The amount of calculation is small, thereby enabling high-sp...

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Abstract

The invention provides an ultrasonic diagnosis system, a measurement point is set at frame data consisting of an envelope signal obtained by orthogonal detection of an RF signal output from an ultrasonic probe before and after compression of an examinee. The measurement point is moved in the ultrasonic beam direction -first dimensional direction, second dimensional direction or third dimensional direction with respect to the frame data so as to obtain a position where the envelope signal correlation coefficient before and after compression belonging to a correlation window surrounding the measurement point becomes maximum. According to this, the displacement of the measurement point accompanying the compression is obtained and the phase difference between the RF signals before and after the compression is obtained, so as to accurately obtain a displacement of the measurement point accompanying the compression by displacement measurement means. Thus, it is possible to estimate the displacement distribution without being restricted by the displacement amount, reduce the calculation time, and cope with a horizontal direction displacement.

Description

[0001] This application is a divisional application of the application number "03820755.9 (PCT / JP03 / 09731)", the application date is July 31, 2003, and the invention title is "ultrasonic diagnostic system and strain distribution display method". technical field [0002] The present invention relates to an ultrasonic diagnostic system and a strain distribution display method, which allow users to quantitatively measure the hardness of tissues by using ultrasonic diagnostic equipment. Background technique [0003] Ultrasonic diagnosis is applied not only to the observation of tissue structures but also to the field (ultrasonic tissue characterization) of measuring physical quantities within tissue such as sound velocity, damping coefficient, etc., and generating diagnostic images from the physical quantities thus measured. As part of this field, the field is known in which the stiffness, ie elastic properties, of tissue are measured. Because of the close relationship between t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08G01S15/10G01S15/88G01S15/89G01N29/44A61B8/00G01N29/22
CPCG01N2291/0289G01N2291/02827
Inventor 椎名毅山川诚新田尚隆
Owner HITACHI HEALTHCARE MFG LTD
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