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Elastic registration method of CAG image sequence

A technique for elastic registration, image sequence, applied in the field of medical imaging

Inactive Publication Date: 2012-10-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0003] Coronary arteries are attached to the epicardial surface and move rhythmically with the heart. This movement is non-rigid and includes translation, rotation, expansion / contraction, serpentine deformation, etc. The morphology of coronary vessels will change greatly, and it is difficult to obtain an accurate description of the morphology and structure of coronary vessels simply by relying on the two-dimensional projection at one moment

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  • Elastic registration method of CAG image sequence
  • Elastic registration method of CAG image sequence
  • Elastic registration method of CAG image sequence

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Embodiment Construction

[0047] The invention relates to registration of medical images. Medical image registration refers to two images of the same anatomical structure, find out the mapping relationship between each point from one image to another image, so that the relevant points on the two images achieve spatial consistency.

[0048] According to its ability to solve image deformation, image registration technology can be divided into two categories: rigid registration and elastic registration: the former can only solve the problem of rigid transformation, that is, if the straight line of one image is still Corresponding to the straight line of another image, the transformation between these two images is called rigid transformation, and the registration of these two images is called rigid registration; the latter can deal with the elastic deformation problem existing in the image, That is, if there is a straight line corresponding to the curve of another image in one image, that is, deformation ...

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Abstract

The invention relates to an elastic registration method of a CAG image sequence, comprising that single pixel and 8-connectino skeleton of main vascular branches are extracted from each frame of the CAG image and are expressed as ordered sets of pixel points; and a preset registration error function is set to a minimum value to find corresponding relations between two vascular skeleton point sets in adjacent time points. In the invention, the preset registration error function is used to carry out elastic registration for each adjacent frame in an X-ray coronary angiography image sequence, in order to find corresponding relations between vascular angiography skeleton points. The method creates conveniences for acquiring information of the coronary in a cardiac cycle movement and deformation, for further analyzing condition of hearts movement, and for reconstructing the coronary vessels in a dynamic three-dimension manner.

Description

technical field [0001] The invention relates to a method for elastically registering X-ray coronary angiography (coronary angiography, CAG) image sequences, which belongs to the technical field of medical imaging. Background technique [0002] X-ray coronary angiography (CAG) is an interventional imaging technique commonly used in clinical diagnosis of coronary heart disease. A special catheter is retrogradely inserted from the femoral artery or the radial artery of the upper arm through percutaneous puncture, and sent to the ascending aorta. Under the guidance of the X-ray fluoroscopy image, it is inserted into the left or right coronary artery, and then the contrast agent is injected to make the coronary Arterial imaging, using a contrast machine to perform cinematography or filming in rapid succession from different angles. [0003] Coronary arteries are attached to the epicardial surface and move rhythmically with the heart. This movement is non-rigid and includes trans...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 孙正刘存刘冰茹
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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