Locally Switching Between Cost Functions in Iterative Non-rigid Registration
In non-rigid image registration problems, it can be difficult to construct a single cost function that adequately captures concepts of similarity for multiple structures, for example when one structure changes in density while another structure does not. We propose a method that locally switches between cost functions at each iteration of the registration process. This allows more specific similarity criteria to be embedded in the registration process and prevents costs from being applied to structures for which they are inappropriate. We tested our method by registering chest computed tomography (CT) scans containing a healthy lung to scans of the same lung afflicted with acute respiratory distress syndrome (ARDS). We evaluated our method both visually and with the use of landmarks and show improvement over existing methodology.
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- 8.Li, B.: The construction of a normative human lung atlas by inter-subject registration and warping of CT images. PhD thesis, The University of Iowa (2004)Google Scholar
- 9.Yu, J.N., Rahey, F.H., Gage, H.D., Eades, C.G., Harkness, B.A., Pelizzari, C.A., Keyes Jr., J.W.: Intermodality, retrospective image registration in the thorax. The Journal of Nuclear Medicine 36(12), 2333–2338 (1995)Google Scholar
- 10.Udobi, K.F., Childs, E., Touijer, K.: Acute respiratory distress syndrome. American Family Physician 67(2), 315–322 (2003)Google Scholar
- 11.Bellardine, C.L., Ingenito, E.P., Hoffman, A., Lopez, F., Sandborn, W., Suki, B., Lutchen, K.R.: Relating heterogeneous mechanics to gas exchange function during mechanical ventilation. Annls. Biomed. Eng (2005) (in press)Google Scholar