SEPARATION AND ESTIMATION METHOD FOR MULTIPLE MOTION PARAMETERS IN X-RAY ANGIOGRAPHIC IMAGE

摘要

A separation and estimation method for multiple motion parameters in an X-ray angiographic image. The method comprises: firstly, determining a cardiac motion signal cycle and sequences of a translational motion change frame according to an angiographic image sequence; then, tracking a motion sequence of a point by means of vascular structure feature points in the angiographic image sequence; then, processing the motion sequence by means of multi-variable parameter optimization and Fourier frequency domain filtering; and separating out an optimal translational motion curve, an optimal cardiac motion curve, an optimal respiratory motion curve and an optimal high frequency motion curve 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. In the method, because it is considered that the integration of multiple motion signals is reflected in the X-ray angiographic image, the separation estimation of the multiple motion parameters is provided, and each separated motion can be more precise, thereby providing an accurate and effective help to the diagnosis of a doctor.