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Publication Detail
Three dimensional image injection in the binocular operating microscope
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Edwards PJ, Hawkes DJ, Hill D, Jewell D, Spink R, Clmndra S, Blimey S, Strong A, Gleeson MJ
  • Publication date:
    01/12/1997
  • Pagination:
    55, ?
  • Journal:
    Skull Base Surgery
  • Volume:
    7
  • Issue:
    SUPPL. 2
  • Status:
    Published
  • Print ISSN:
    1052-1453
Abstract
Image guidance is being rapidly adopted in the practice of skull hase surgery in order to increase the speed and safety of lengthy procedures. Whilst stereotactic frames with CT image guidance have been available to the neurosurgeon for over two decades, frameless techniques are relatively recent. The operating microscope, with ils high quality stereo view of the surgical field, is now indispensable in the practice of neurosurgery and otolaryngology and provides an ideal device for overlaid display. This is because the microscope has a head that is relatively straightforward to track in space and an optical system that can be accurately calibrated and allows the injection of synthetic images. Over the last 4 years, a system has been developed at Guy's in conjunction with Leica which enables 3-D image data about critical structures to be superimposed onto the microscopic field of view in the correct position. This image data is derived from CT. MRI, and MRA scans. The use of the LED based 3-D localiser has made it possible to integrate patient, microscope head and image coordinants, and. therefore, one can now accurately project the stereo perspective image data of critical structures into the microscope eyepieces. Tests have been performed with a skull phantom, a volunteer, and in the operating theatre. We believe that the accuracy of the overall system is sufficient to provide useful surgical guidance to the skull base surgeon.
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