Motion tracking of coronary vessel segment based on active contour model / 生物医学工程学杂志

ABSTRACT

An original method for analyzing two-dimensional motion of coronary arteries from X-ray angiogram sequences based on active contour model (snake) is presented. The convergence result of the snake in previous frame is used as the initial guess in current frame. Centerlines of interesting vessel segments at successive time instants can be detected through snake deforming from its initial position to optimal position by minimizing the proper energy function. Measurement of intensity similarity between consecutive frames is encompassed into the energy function to obtain accurate tracking. The effectiveness of the method has been demonstrated on clinical coronary artery angiogram sequences and results are encouraging.