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Wall filtering method for color blood flow imaging

A color blood flow and wall filtering technology, applied in the field of image processing, can solve problems such as the inability of adaptive ground wall filtering, and achieve the effects of improving wall filtering efficiency and blood flow image performance, improving efficiency, and reducing glitter artifacts.

Pending Publication Date: 2022-07-26
VINNO TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] This application provides a wall filtering method for color blood flow imaging, which can solve the problem that the existing wall filtering methods cannot adapt to the ground wall filtering

Method used

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  • Wall filtering method for color blood flow imaging
  • Wall filtering method for color blood flow imaging
  • Wall filtering method for color blood flow imaging

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Embodiment Construction

[0052] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application.

[0053] First, some terms involved in this application are introduced.

[0054] Finite impulse response (Finite Impulse Response, FIR) filter: It can guarantee the arbitrary amplitude-frequency characteristics while having strict linear phase-frequency characteristics, and its unit sampling response is finite.

[0055]After the echo signal used for blood flow imaging is processed by the FIR filter, the effective points of the data have a certain loss, and the number of points lost is the filter order. When the filter order is low, the transition band is too wide, and the filtering effect is not ideal; when the filter order is high (cannot exceed the data length), there are too ma...

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Abstract

The invention relates to a wall filtering method for color blood flow imaging, and belongs to the technical field of image processing, and the method comprises the following steps: carrying out self-correlation operation by using an in-phase component I signal and an orthogonal component Q signal to obtain tissue motion information; performing phase rotation processing on the IQ signal under the condition of determining that the current position meets a phase rotation condition based on the tissue motion information; performing wall filtering processing on the IQ signal by using an ith-grade wall filter to obtain a filtered IQ signal; performing self-correlation operation on the filtered IQ signal to obtain blood flow motion information; if it is determined on the basis of the blood flow motion information that wall filtering processing is continued, performing wall filtering processing again with i = i + 1; carrying out reverse phase rotation processing on the filtered autocorrelation operation result under the condition that the wall filtering processing is not continued; the wall filtering efficiency and the blood flow image performance in ultrasonic color Doppler blood flow imaging can be improved.

Description

【Technical field】 [0001] The application relates to a wall filtering method for color blood flow imaging, which belongs to the technical field of image processing. 【Background technique】 [0002] The acquisition principle of the color blood flow image includes: the beam emitted by the probe on the ultrasound equipment is reflected by the inspected part to produce a frequency shift, and then received by the probe and amplified by the receiving. After beamforming, the echo signal is orthogonally demodulated, and the demodulated signal is subjected to wall filtering, autocorrelation estimation and color coding to obtain a color blood flow image. [0003] Generally, the echo signals from the human body include: blood flow echo signals from blood flow, and wall echo signals from blood vessel walls and tissues moving at a low speed. Among them, the blood flow echo signal is a signal required for color blood flow imaging, and the wall echo signal is an imaging interference signal,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H21/00A61B8/06A61B8/08
CPCH03H21/0043A61B8/06A61B8/5223A61B8/5207
Inventor 凌涛
Owner VINNO TECH (SUZHOU) CO LTD