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

A technology for ultrasound images and medical images, which is used in medical science, image analysis, image data processing, etc., and can solve the problems of unfavorable image non-destructive reconstruction, complex calculation, and large memory requirements.

Inactive Publication Date: 2008-08-13
HARBIN INST OF TECH
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In practical applications, this wavelet transform is realized by convolution, so the calculation is complex, the operation speed is slow, and the demand for...

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

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Embodiment Construction

[0073] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0074] The entire registration process is shown in Figure 1. The reference image to be registered and the floating image go through four processes: wavelet decomposition, global rigid body coarse registration of the approximate image, wavelet reconstruction of the coarse registration result image, and non-rigid body local registration at the original resolution level. The two-layer coarse-fine coupling registration method is adopted, and the method is shown in Figure 2.

[0075] The integer lifting wavelet decomposition of the reference image to be registered and the floating image uses the integer lifting form of the biorthogonal bior4.4 wavelet. The decomposition process is shown in Figure 3. The image is decomposed by two-layer wavelet. Figure 5 shows the decomposition flowchart of an ultrasound image of the hepatic vein.

[0076] The...

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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...

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Application Information

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IPC IPC(8): A61B8/00G06T3/00G06T7/00
Inventor 王强沈毅金晶王艳冯乃章马立勇
Owner HARBIN INST OF TECH
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