Image analysis – Applications – Biomedical applications
Reexamination Certificate
1999-03-22
2001-10-02
Boudreau, Leo (Department: 2621)
Image analysis
Applications
Biomedical applications
Reexamination Certificate
active
06298148
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a method of registering surfaces using curvature data and in particular to a method of registering a patient surface created from patient range data with a model surface created from patient image data.
Three-dimensional models of a patient, derived using medical imaging techniques (e.g. CT, MR), are useful in both planning and performing surgical procedures. U.S. Pat. No. 5,740,802, assigned to the assignee of the present application, discloses a system that aligns live video of the patient and models generated from medical imaging to facilitate surgery. In smooth regions, without prominent landmarks, it is difficult to align the image data with the model data.
BRIEF SUMMARY OF THE INVENTION
An exemplary embodiment of the invention is directed to a method of registering a generated patient surface with a model surface based on curvature. The method includes acquiring patient range data and determining the patient curvature based on the range data. A patient surface is generated and shaded based on the patient curvature. A model surface is generated from image data and processed to determine the curvature of the model surface. The model surface is shaded to represent the model curvature. The shaded patient surface and the shaded model surface may be aligned by manipulating the patient surface and/or the model surface until the curvature features coincide.
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Cline Harvey Ellis
Lorensen William Edward
Boudreau Leo
General Electric Company
Ingraham Donald S.
Nakhjavan Shervin
Testa Jean K.
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