Method of motion compensation for trans-catheter aortic valve implantation

摘要

A method (10) to compensate for cardiac and respiratory motion in cardiac imaging during minimal invasive (e.g., trans-catheter) AVI procedures by image-based tracking (20, 25) on fluoroscopic images.

主权项

1. A computer-implemented method of motion compensation in a cardiac imaging using a dynamic overlay of a 3D aortic volume with an intra-operative fluoroscopic image sequence of a target cardiac region, comprising
estimating the motion of the target cardiac region by tracking an image object, located at a relatively fixed position in the target cardiac region and moving in a correlated manner with the motion of the target cardiac region, throughout the image sequence; describing the correlated motion of the image object with the motion of the target cardiac region by a correlation motion model; and adjusting the 3D aortic volume in the overlay with the fluoroscopic image sequence using the estimated motion of the target cardiac region and the correlation motion model of the image object with the motion of the target cardiac region, wherein the fluoroscopic image sequence of the target cardiac region comprises a biplane fluoroscopic image sequence, wherein the estimating step comprises estimating either or both translational and rigid-body transformation of the target cardiac region by tracking the image object in a 3D space against two views of the biplane fluoroscopic image sequence, and wherein the two views of the biplane fluoroscopic image sequence are two synchronized biplane views in a synchronized cardiac movement.