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Synthetic Aperture Ultrasound Imaging Motion Compensation Method

An ultrasonic imaging and synthetic aperture technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as poor imaging quality, and achieve the effect of solving poor imaging quality

Active Publication Date: 2016-05-04
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor imaging quality in the prior art when there is axial displacement, and then obtain high-resolution images

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  • Synthetic Aperture Ultrasound Imaging Motion Compensation Method
  • Synthetic Aperture Ultrasound Imaging Motion Compensation Method
  • Synthetic Aperture Ultrasound Imaging Motion Compensation Method

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Embodiment Construction

[0010] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0011] figure 1 It is a flow chart of the synthetic aperture ultrasonic imaging motion compensation method of the present invention, as shown in the figure, the present invention specifically includes the following steps:

[0012] Step 101: Obtain the first low-resolution scanning line by using a linear scanning method with a single focal point for transmitting and receiving and the same focal point;

[0013] Specifically, the specific processing method of the step 101 is as follows:

[0014] Step 1011, using the 1st to Nth 1 array elements transmit signals, and the transmitting focus is VS 1 , from the 1st to the Nth in the array 1 Array elements receive signals, and the number of sampling points of each array element is P, and beamforming is performed on the signals received by each array element, and the receivi...

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Abstract

The invention relates to a synthetic aperture ultrasonic imaging motion compensation method. The method comprises the following steps that first low-resolution-ratio scanning lines are obtained in a linear scanning mode that single focuses are transmitted and received and are identical; estimation and compensation are conducted on motion between the first low-resolution-ratio scanning lines, so that second low-resolution-ratio scanning lines are obtained; values obtained after corresponding sampling points on the other second low-resolution-ratio scanning lines in virtual source opening angles are multiplied by weighted values are added to the corresponding sampling points on the second low-resolution-ratio scanning lines corresponding to virtual sources, high-resolution-ratio scanning lines are obtained, and therefore a high-resolution-ratio image is obtained. According to the synthetic aperture ultrasonic imaging motion compensation method, effective motion compensation is conducted on axial motion of an imaging plane, so that the problem that the motion affects imaging quality in a synthetic aperture method is solved effectively.

Description

technical field [0001] The invention relates to an ultrasonic imaging method, in particular to a synthetic aperture ultrasonic imaging motion compensation method. Background technique [0002] The synthetic transmit aperture is transmitted by a single array element, received by a full aperture, and a low-resolution image (LRI) is obtained through beamforming, and a high-quality image (HRI) is obtained by coherently adding the LRI obtained by all transmit array elements. Because HRI achieves dynamic focusing on both transmission and reception, it has higher resolution than traditional ultrasound imaging methods. However, this synthetic transmit aperture imaging method faces three main problems: 1) poor penetration and low signal-to-noise ratio of echo signals caused by single-array emission; 2) motion between low-resolution images will reduce their coherence, thus 3) In the process of system implementation, a large number of radio frequency echo (RF) lines need to be stored ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/52
CPCG01S7/52
Inventor 孟晓辉理华肖灵
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI