Registration of medical images using an interpolated closest point transform: method and validation

Zhujiang Cao; Shiyan Pan; Rui Li; Ramya Balachandran; Michael J. Fitzpatrick; William C. Chapman; Benoit M. Dawant

doi:10.1117/12.480306

15 May 2003 Registration of medical images using an interpolated closest point transform: method and validation

Zhujiang Cao, Shiyan Pan, Rui Li, Ramya Balachandran, Michael J. Fitzpatrick, William C. Chapman, Benoit M. Dawant

Author Affiliations +

Proceedings Volume 5032, Medical Imaging 2003: Image Processing; (2003) https://doi.org/10.1117/12.480306
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

Image registration is an important procedure for medical diagnosis. Since the large inter-site retrospective validation study led by Fitzpatrick at Vanderbilt University, voxel-based methods and more specifically mutual information (MI) based registration methods have been regarded as the method of choice for rigid-body intra-subject registration problems. In this study we propose a method that is based on the iterative closest point (ICP) algorithm and a pre-computed closest point map obtained with a slight modification of the fast marching method proposed by Sethian. We also propose an interpolation scheme that allows us to find the corresponding points with a sub-voxel accuracy even though the closest point map is defined on a regular grid. The method has been tested both on synthetic and real images and registration results have been assessed quantitatively using the data set provided by the Retrospective Registration Evaluation Project. For these volumes, MR and CT head surfaces were extracted automatically using a level-set technique. Results show that on these data sets this registration method leads to accuracy numbers that are comparable to those obtained with voxel-based methods.

Citation Download Citation

Zhujiang Cao, Shiyan Pan, Rui Li, Ramya Balachandran, Michael J. Fitzpatrick, William C. Chapman, and Benoit M. Dawant "Registration of medical images using an interpolated closest point transform: method and validation", Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); https://doi.org/10.1117/12.480306

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