Geometric constraint analysis and synthesis: Methods for improving shape-based registration accuracy

Validation of Registration Techniques
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1205)


Shape-based registration is a process for estimating the transformation between two shape representations of an object. It is used in many image-guided surgical systems to establish a transformation between pre- and intra-operative coordinate systems. This paper describes several tools which are useful for improving the accuracy resulting from shape-based registration: constraint analysis, constraint synthesis, and online accuracy estimation. Constraint analysis provides a scalar measure of sensitivity which is well correlated with registration accuracy. This measure can be used as a criterion function by constraint synthesis, an optimization process which generates configurations of registration data which maximize expected accuracy. Online accuracy estimation uses a conventional root-mean-squared error measure coupled with constraint analysis to estimate an upper bound on true registration error. This paper demonstrates that registration accuracy can be significantly improved via application of these methods.


geometric constraint analysis geometric constraint synthesis online accuracy estimation shaped-based registration intra-operative registration 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  1. 1.Robotics InstituteCarnegie Mellon UniversityPittsburgh
  2. 2.Center for Orthopaedic ResearchShadyside HospitalPittsburgh

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