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Ultrasonic elastography and pressure feedback method based on receive-side spatial-compounding

A technology of ultrasonic elastography and spatial compounding, which is applied in medical and basic fields, can solve the problems of not being able to display the difference between soft and hard tissues well, and unfavorable doctor's diagnosis, and achieve the effects of lower frame rate, easy analysis, and low imaging noise

Active Publication Date: 2012-08-08
SASET CHENGDU TECH LTD
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Problems solved by technology

[0007] Finally, when elastography is processed and displayed, different pressing forces may have the same display effect under different soft-hard ratio tissues, so it cannot show the real soft-hard difference of the tissue well, which is not conducive to the doctor's diagnosis

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  • Ultrasonic elastography and pressure feedback method based on receive-side spatial-compounding

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Embodiment Construction

[0022] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Signal Time Shift Estimation Based on Phase Zero Algorithm Based on Two-Dimensional Window on IQ Data

[0024] For the traditional one-dimensional window phase zero algorithm on IQ data, the following method is used to estimate the time shift within a window range of two frames of signals:

[0025] τ 0 =0

[0026] τ i = τ i - 1 - arg ( e j w 0 τ i - 1 Σ t ...

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Abstract

The invention discloses an ultrasonic elastography andpressure feedback method based on receive-side spatial-compounding, namely, a medical ultrasonic elastography algorithm realized by an improved algorithm based on phase zero. When calculating displacement, the traditional algorithm carries out displacement calculation on a scanning line, which leads to large errors in the case that tissue movement contains a horizontal component; while, the window of noval algorithm covers a plurality of adjacent scanning lines, thereby reducing the errors brought by the horizontal component of tissue movement and improving the signal-to-noise ratio of the ultrasonic elastography. At the same time, the method provided in the invention also employs Receive-Side Spatial-Compounding technology in an elastography system, thereby further reducing the impact of elastography noise and further advancing the signal-to-noise ratio of the system. Finally, an average-strain-based elastography pressure feedback technology is provided to prompt current pressing strength and a normal pressing range for a doctor.

Description

technical field [0001] The invention belongs to the field of medical technology, and relates to an ultrasonic elastography method, in particular to an ultrasonic elastography and pressure feedback method based on spatial compounding at a receiving end, which belongs to the basic field, mainly digital signal processing, and also includes part of digital image processing. Background technique [0002] Elastography is an ultrasonic imaging method that displays tissue elastic modulus or softness and hardness through tissue movement. It can be used to detect hard tumors in the human body and provide doctors with some reference information for benign and malignant tumors. Phase-zero is one of the main methods of elastography. The principle is to estimate the time offset of the signal at the center of the window compared to the signal of the previous frame by calculating the average value of the signal phase difference in the window at the same position in two adjacent frames when ...

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Application Information

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IPC IPC(8): A61B8/00
Inventor 刘西耀任杰刘东权
Owner SASET CHENGDU TECH LTD
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