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A Vascular Registration Method Based on Multi-Sequence Medical Images

A technology of medical images and sequence images, applied in the field of registration of multi-sequence blood vessel images, can solve the problems of low blood vessel registration accuracy and the like

Active Publication Date: 2017-12-05
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] In order to overcome the shortcomings of the low accuracy of blood vessel registration in the existing medical image processing technology, the present invention provides a high precision blood vessel registration method based on multi-sequence medical images

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  • A Vascular Registration Method Based on Multi-Sequence Medical Images
  • A Vascular Registration Method Based on Multi-Sequence Medical Images
  • A Vascular Registration Method Based on Multi-Sequence Medical Images

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings.

[0054] refer to Figure 1 ~ Figure 4, a blood vessel registration method based on multiple sequences of medical images, comprising the following steps:

[0055] 1) Acquire multi-sequence medical vascular images (such as multi-sequence magnetic resonance images (MRI), multi-sequence CT images, etc.). This description takes multi-sequence magnetic resonance images as an example to illustrate its technical process. The multi-sequences use T1 (T1 weighted imaging), T1GD (T1 contrast agent imaging), T2 (T2 weighted imaging), and PD acquired under a magnetic field strength of 1.5T. (proton density imaging), STIR (short inversion time inversion recovery imaging) sequence images. During the registration process, the T1 image is used as the reference image for registration, and other sequence images are used as floating images;

[0056] 2) Because medical images will be subj...

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Abstract

A blood vessel registration method based on multi-sequence medical images, comprising the following steps: 1) acquiring multi-sequence medical blood vessel images, selecting one sequence image as a reference image for registration, and other sequence images as floating images; Multi-sequence medical blood vessel images are denoised; 3) shape context description of blood vessel edges; 4) edge point matching; 5) filtering out mismatches; The energy function E(pi, qj) of the deformed reference image and the floating image vessel contour reaches the minimum. According to the result of edge correction, the spline interpolation method is used to interpolate the local vessel area of ​​the floating image, and finally the registered result. The invention provides a high-precision blood vessel registration method based on multi-sequence medical images.

Description

technical field [0001] The invention belongs to the technical field of medical image processing, and in particular relates to a registration method of multi-sequence blood vessel images. Background technique [0002] At present, in the field of MR blood vessel image registration, the traditional natural image registration method is mainly used, that is, to establish an image similarity measurement function or error function, and to maximize the similarity between the reference image and the floating image or minimize the error through a certain optimization strategy. , and finally get the transformation matrix of the reference image and the floating image. However, these methods do not take into account the complex structure of MR blood vessel images, low contrast and low signal-to-noise ratio (SNR), which makes the similarity measurement function or error function easy to fall into local extremes. Large or extremely small values, and the purpose of global accurate registrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/33
Inventor 汪晓妍李军伟黄晓洁张剑华滕忠照陈胜勇
Owner ZHEJIANG UNIV OF TECH
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