Real-time ultrasonic elasticity imaging method and system

Abstract

The invention provides a real-time ultrasonic elasticity imaging method and system. The imaging method mainly comprises the steps of obtaining B-mode images under different states of deformation of biological tissues caused by slow extrusion of external force; selecting ROI areas of two frame images; obtaining displacement fields by using the optical flow method and transmitting parameter information of sub-steps requiring acceleration operations and containing repetitive operations to a first GPU data caching module in the calculation process; performing the operation treatment of all the sub-steps requiring acceleration operations with a GPU working group; putting the operation result information of all the sub-steps into an optical flow method operation process and finally obtaining the displacement fields, namely, the optical flow fields, of the ROI areas; obtaining the axial strain fields of the ROI areas of the images; performing noise reduction treatment on axial strain field information; performing colorizing treatment on obtained information; performing elastic classification on target areas in the ROI areas. The real-time ultrasonic elasticity imaging method has the advantages of high operation speed, relatively high precision and relatively great robustness.

Description

technical field [0001] The invention relates to the field of ultrasonic echo imaging, in particular to a real-time ultrasonic elastic imaging method and system. Background technique [0002] Ultrasonic echo imaging technology has been widely used in military, medical and other fields. The concept of elastography in ultrasound echo imaging was first proposed by Ophir et al. in 1991. After that, elastography technology has developed rapidly in the past two decades, and it is called the E-mode after the A-mode, B-mode, D-mode, and M-mode ultrasound. Ultrasound elastography is the imaging of biological tissue elasticity parameters through an ultrasonic imaging system. Ultrasound elastography can provide biological tissue elastic characteristics that cannot be reflected by traditional B-ultrasound images, and is very helpful for clinical applications such as tumor detection. Due to the advantages of easy implementation, suitable for real-time diagnosis, and non-invasiveness to ...

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Problems solved by technology

If these two assumptions are not true, that is, the image is discontinuous and the displacement is large, the displacement and the image gradient cannot be related, and the approximation obtained by the Taylor expansion will be poor

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