Medical ultrasound image registration method based on integer lifting wavelet multiresolution analysis

Abstract

A non-rigid body image registering method, belongs to medicine ultrasonic image processing field. The invention provides a ultrasonic image registering method implemented by multi-resolution analysis and lamination based on integer lifting wavelet, directing towards the difficulty that the previous registering computation of non rigid body image is complicated and the requirement for memory is large. The registration image is subjected to two-layer decomposition using integer lifting wavelet and then the decomposed approximate image is subjected to overall rigid body registration of low resolution, furthermore the registered image is subjected to image reconstruction of original resolution using integer lifting wavelet, finally the local non-rigid body registration is performed at the original image resolution, therefore the final registered image is obtained. The method of multi-resolution analysis based on integer lifting wavelet can reduce the amount of calculation and the computation complexity and registration accuracy are unified using the method of multi-layer decomposition and fine and rough combination, therefore the amount of calculation is reduced without reducing the registration accuracy. The non-rigid body image registering method has wide application prospect in ultrasound imaging field.

Description

Technical field [0001] The invention relates to the technical field of medical ultrasound imaging, in particular to a registration method of medical ultrasound images. Background technique [0002] Medical ultrasound imaging is a diagnostic method with a wide range of applications. It has the advantages of no damage, no ionizing radiation, and convenient use. Image registration has important clinical application value. It can not only be used for the diagnosis of disease characteristics, but also can guide the treatment process and evaluate the treatment effect by tracking the lesion. In image fusion, three-dimensional image reconstruction and surgical navigation, registration methods are widely used to locate the spatial position relationship between images. [0003] Medical image registration refers to the search for one or a series of spatial transformations for a medical image (called a floating image), so that the corresponding point on another medical image (called a refere...

AI Technical Summary

Problems solved by technology

In practical applications, this wavelet transform is realized by convolution, so the calculation is complex, the operation speed is slow, and the demand for memory is large; The input operation will inevitably produce different degrees of distortion, which is not conducive to the lossless reconstruction of the image.

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