Tracking planar lung motion in 4D CT with optical flow: validations and comparison of global, local, and local-global methods
Mohammadreza Negahdar, Amir A. Amini · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2010
For a common set of 4D CT lung images, we report results from the application of a number of optical flow techniques including global, local, and combined local-global methods for tracking planar lung motion. Our comparisons are primarily empirical, and concentrate on the accuracy, that is magnitude and direction of error at a discrete set of landmark points with known motions, and reliability, that is, objective lung boundary deformation tracking. Our results indicate that performance varies significantly among the techniques tested.