Multi-frequency alternative-ejecting real-time ultrasonic elastography method

An ultrasound elastography, multi-frequency technology, applied in the directions of ultrasound/sonic wave/infrasonic wave diagnosis, acoustic wave diagnosis, infrasonic wave diagnosis, etc., can solve the problem that the elastography method has no operation status display and feedback module, which affects image quality and doctor diagnosis, noise removal Noise effect is not obvious, so as to avoid horizontally discontinuous striped elastic images, improve efficiency and quality, and suppress error displacement propagation
CN102920482AInactive Publication Date: 2013-02-13CHONGQING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING UNIV OF TECH
Publication Date
2013-02-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a multi-frequency alternative-ejecting real-time ultrasonic elastography method which comprises the steps of: 1, alternatively ejecting N kinds of frequency ultrasonic waves by an ultrasonic probe in a process of extracting tissues by using hands; 2, carrying out displacement estimation on adjacent same frequency echoes by using a two-dimensional weighting phase separation algorithm; 3, equally weighting N frames of continuous different frequency displacement images to generate a compound displacement image; 4, carrying out gradient operation on the compound displacement image to generate a strain image; and 5, carrying out downsampling on the strain image and carrying out gray scale mapping, and scanning and converting into an elastic image. According to the method, displacement images with different noise modes are generated by using different ejecting frequencies, the displacement estimation error is reduced through compounding of the displacement images, and the elastography pseudomorphism noise caused by speckle noise is inhibited. The signal to noise ratio of the elastic image generated by the compound image is higher than that of an elastic image generated by compounding the former frequency sub-displacement image, and therefore, the property and the quality of elastography are improved.
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Description

technical field

[0001] The invention belongs to the technical field of ultrasound elastography for medical imaging, and specifically relates to a multi-frequency alternate emission real-time ultrasound elastography method, which is mainly used in but not limited to the field of manual breast compression ultrasound elastography. Image Processing. Background technique

[0002] Ultrasound (Ultrasound) elastography (Strain Imaging) uses ultrasonic waves to detect the relative hardness information of human tissue. It is an economical, non-destructive, convenient and fast new medical imaging mode. This imaging method has become one of the important methods for early disease screening, accurate diagnosis, precise treatment and prognosis assessment, especially for early detection of tumors. This imaging method usually involves applying static or quasi-static excitation to the tissue, estimating the distribution of tissue displacement (Displacement) under the excited state by analyz...

Claims

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