Elastic Medical Image Registration using Orientation Attributes at Landmarks
Mike Fornefett, Karl Rohr, Rainer Sprengel, H. Siegfried Stiehl · 1998
. A new algorithm is proposed to incorporate orientation attributes at landmarks in an elastic medical image registration scheme. The approach is based on a minimizing functional and can cope with images of arbitrary dimensions. Constraints due to orientations are incorporated through scalar products between the transformed orientations in the source image and vectors which are perpendicular to the orientations in the target image. For synthetic data sets we show that the structure of a rigid object in an otherwise elastically deformed image can be preserved. The application of our approach to tomographic data sets shows that improvements w.r.t. accuracy can be achieved provided a sufficient number of landmarks is well-distributed over the image. 1 Introduction Landmark-based elastic registration relies on the information associated with landmark points. To improve the results of landmark-based approaches while maintaining their efficiency, work in the past has been done on including ...