Multi-thread fusion living body ultrasonic thermal strain imaging method and device

Abstract

The invention discloses a multi-thread fusion living body ultrasonic thermal strain imaging method and device, and belongs to the field of medical image processing. According to the method, after an ultrasonic image sequence is collected, images are divided into a plurality of threads according to correlation, and image registration and thermal strain imaging are carried out. Furthermore, a biological heat conduction equation solved by a time domain finite difference method is used as a prediction model, and a self-adaptive Kalman filter is used for filtering the thermal strain sequence. And finally, fusing the thermal strain of each thread according to a scalar weighted linear minimum variance information fusion criterion. According to the method, the defects that in existing living body thermal strain imaging, an imaging result depends on a single motion phase, physiological motion is difficult to accurately compensate, so that thermal strain contour distortion and a poor signal-to-noise ratio are caused, and conventional spatial filtering is at the cost of sacrificing spatial resolution are overcome, and a living body thermal strain imaging result which is accurate, high in robustness and high in temporal-spatial resolution can be obtained.

Description

technical field [0001] The invention relates to the field of medical image processing, and more specifically, to a method and device for in vivo ultrasonic thermal strain imaging with multi-thread fusion. Background technique [0002] Ultrasonic thermal strain imaging is a method for quantitatively estimating the temperature by analyzing the movement of tissue scattering points in the heating process image, and then obtaining the thermally induced displacement and strain of the tissue. However, in vivo thermal strain imaging, the movement of the living body between images will lead to large strain artifacts, and even cause thermal strain imaging to fail. In order to overcome the influence of living body motion, existing thermal strain imaging methods usually use image registration or spatial filtering methods. However, due to the lack of motion phase analysis, the motion suppression effect of image registration is easily affected by the motion state of the initial image, an...

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Problems solved by technology

[0006] Aiming at the problems existing in the prior art that thermal strain imaging accuracy depends on a single motion phase, and physiological motion is difficult to be fully suppressed, resulting in thermal strain profile distortion and poor signal-to-noise ratio, while conventional spatial filtering sacrifices spatial resolution. The present invention provides a method and device for in vivo ultrasonic thermal strain imaging with multi-thread fusion, which can realize thermal strain imaging for multi-thread image registration, and finally fuses to obtain Stable, accurate, high temporal and spatial resolution thermal strain images in vivo

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