DECOMPOSITION AND ESTIMATION METHOD FOR MULTIPLE MOTION PARAMETERS IN SINGLE-ARM X-RAY ANGIOGRAPHIC IMAGE

摘要

A decomposition and estimation method for multiple motion parameters in a single-arm x-ray angiographic image comprises the following steps: (1) automatically selecting stable vascular structure feature points; (2) automatically tracking the selected vascular structure feature points in a whole angiography image sequence; (3) selecting a sequence ŝ(n) with a length n_s=k*N₁ (k1) in a point tracking sequence (N₁ being the cycle of heart motion); (4) decomposing ŝ(n) into x-direction motion x(n) and y-direction motion y(n), and separately performing EMD on the x(n) and the y(n), so as to obtain independent motion signals after EMD; and (5) correspondingly classifying the independent signals according to priori physiological knowledge. The method has wide applicability and flexibility, higher safety and operability and better reliability and accuracy.