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Publication Detail
Voxel-Based 2-D/3-D registration of fluoroscopy images and CT scans for image-guided surgery
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Weese J, Penney GP, Desmedt P, Buzug TM, Hill DLG, Hawkes DJ
  • Publication date:
  • Pagination:
    284, 293
  • Journal:
    IEEE Transactions on Information Technology in Biomedicine
  • Volume:
  • Issue:
  • Status:
  • Print ISSN:
Registration of intraoperative fluoroscopy images with preoperative three-dimensional (3-D) CT images can be used for several purposes in image-guided surgery. On the one hand, it can be used to display the position of surgical instruments, which are being tracked by a localizer, in the preoperative CT scan. On the other hand, the registration result can be used to project preoperative planning information or important anatomical structures visible in the CT image onto the fluoroscopy image. For this registration task, a novel voxel-based method in combination with a new similarity measure (pattern intensity) has been developed. The basic concept of the method is explained at the example of two-dimensional (2-D)/3-D registration of a vertebra in an X-ray fluoroscopy image with a 3-D CT image. The registration method is described, and the results for a spine phantom are presented and discussed. Registration has been carried out repeatedly with different starting estimates to study the capture range. Information about registration accuracy has been obtained by comparing the registration results with a highly accurate ground-truth registration, which has been derived from fiducial markers attached to the phantom prior to imaging. In addition, registration results for different vertebrae have been compared. The results show that the rotation parameters and the shifts parallel to the projection plane can accurately be determined from a single projection. Because of the projection geometry, the accuracy of the height above the projection plane is significantly lower. © 1997 IEEE.
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