Separation estimation method of multiple motion parameters in X-ray angiographic image

Abstract

The invention discloses a separation estimation method of multiple motion parameters in an X-ray angiographic image. Firstly a cardiac motion signal cycle and a sequence of a translational motion change frame are determined according to an angiographic image sequence, and then the motion sequence of a point is tracked through the vascular structure feature point in the angiographic image sequence. Secondly, the motion sequence is processed through multi-variable parameter optimization and Fourier frequency domain filtering, and a best translational motion curve, a best cardiac motion curve, a best respiratory motion curve and a best high frequency motion curve can be separated according to the sequence of the translational motion change frame, the cardiac motion signal cycle, the range of a respiratory motion signal cycle and the range of a high frequency motion signal cycle. According to the method, since the fact that the integration of multiple motion signals is reflected by the X-ray angiographic image is considered, the separation estimation of the multiple motion parameters is provided, each separated motion can be more precise, and accurate and effective help is provided for the diagnosis of a doctor.

Description

technical field [0001] The invention belongs to the technical field of contrast image processing, and more particularly relates to a method for separating and estimating multiple motion parameters in an X-ray angiography image. Background technique [0002] Rhythmic expansion and contraction of the chest to complete inhalation and exhalation, which is breathing movement. Respiratory movement will cause the overall translation of the heart in three-dimensional space. In the X-ray contrast system, due to the influence of respiratory movement, coronary blood vessels will move in two dimensions on the imaging surface. Moreover, during the angiography process, in order to enable the angiography sequence to cover the entire coronary artery system, the doctor may move the catheter bed, resulting in an overall two-dimensional translation between different frames of an imaging sequence. [0003] Therefore, on the one hand, the coronary angiography image records the projection of the...

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Problems solved by technology

[0006] In the patent 200910273528.5, a method for extracting respiratory motion parameters from X-ray contrast images, although Fourier frequency domain separation is also used, it can only extract the heart motion and then treat the remaining curves as respiratory motion, and cannot The translational motion and high-frequency components are separated, so the respiratory motion obtained is not accurate enough, and the robustness of this method is not high

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