Ultrasonic wide-scene imaging method, device and system

Abstract

The present invention provides a panoramic ultrasound imaging method which comprises the following steps: (1) selecting a first image and a second image in a series of images, dividing each selected image into a plurality of areas; (2) selecting total or partial areas in the first image, and selecting a characteristic point in each of selected areas; (3) searching the matching point of each characteristic point selected in the step (2), modifying a transformation parameter along with processing of searching and feeding back the transformation parameter for the searching process; (4) confirming the transformation parameter when the searching is finished, and splicing the two images according to the transformation parameter; and (5) repeatedly executing the steps (1), (2), (3) and (4) until the series of images are spliced to an image. The invention also provides a panoramic ultrasound system which comprises the following components: a probe; a signal transceiver; a beam synthesizer; a signal processor; an image processor; and a display device, wherein the image processor comprises a device for executing the panoramic ultrasound imaging method according to the invention. The leading-out of feedback mechanism increases the searching accuracy.

Description

technical field [0001] The present invention generally relates to the field of ultrasonic imaging, in particular to a method, device and system for ultrasonic wide-view imaging. Background technique [0002] Panoramic imaging is an ultrasound imaging technology for the purpose of assisting medical diagnosis. Its advantage is that it is convenient for doctors to observe and measure diagnostic objects. [0003] Ultrasonic wide-view imaging technology is a technology that obtains a series of two-dimensional slice images by moving the probe in the same plane, and then stitches the series of two-dimensional images into a continuous slice image by using computer reconstruction methods. [0004] Ultrasound instruments are generally used by doctors to observe the internal tissue parts of the human body. By placing the probe on the corresponding skin surface of the human body, the doctor can obtain ultrasonic images of the part. Due to its non-invasiveness, convenience and reliabili...

AI Technical Summary

Problems solved by technology

The difference between the two is: the existing technical solution 3 has a process of using fuzzy logic to correct the local offset before starting the fitting, while the existing technical solution 2 does not have this process

[0015] Disadvantages of the existing technical scheme 1: the amount of calculation for three-dimensional space search is very large, which seriously affects the speed of wide-view imaging; and it is difficult to determine the rotation interval. If the interval is too small, the amount of calculation will be large, and if the interval is too large, the accuracy will be reduced. , since the exact angle is often between the two computed angles

[0016] Disadvantages of the existing technical solution 2: too much trust in the local offset, and the LSM calculation is performed directly without screening or correction; due to the noise of the ultrasonic image and the influence of tissue movement factors, it cannot be guaranteed that the offset calculated by all feature regions is uniform. Correct; if these offsets are used directly, the transformation parameters calculated by LSM may be inaccurate, resulting in abnormal results

[0017] Disadvantages of the third existing technical solution: the use of fuzzy logic to correct the local offset is reasonable; however, the formulation of fuzzy rules relies too much on experience, and it is difficult to guarantee universality

[0019] Disadvantages of the optimization scheme of the prior art scheme 2: the jump search is actually a sampling search with a sampling rate of m×n, where m and n are the jumping steps in the X direction and the Y direction respectively; the sampling search can increase the speed, but it must sacrifice Accurac

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