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Publication Detail
Craniotomy guidance using a stereo-video-based tracking system
  • Publication Type:
    Journal article
  • Publication Sub Type:
  • Authors:
    Thomas DG, Doshi P, Colchester A, Hawkes DJ, Hill DL, Zhao J, Maitland N, Strong AJ, Evans RI
  • Publication date:
  • Pagination:
    81, 83
  • Journal:
  • Volume:
  • Issue:
    011-6125 (Print), 1-3
  • Keywords:
    Craniotomy, Humans, Neurosurgery, Stereotaxic Techniques, Television
  • Addresses:
    National Hospital, London, UK
  • Notes:
    DA - 19970304
In open intracranial neurosurgery, it is desirable to minimize exposure and to approach the target in the most accurate way possible. The VISLAN system described here employs a completely passive hand-held locator which is tracked by a video system and does not require a mechanical linkage nor cables. The system also tracks easily recognizable, constant, anatomical landmarks of the patient. By this means the initial registration of pre-operative imaging and the detection of, and correction for, patient movement can be accomplished. High-resolution MRI segmented interactively is used to define external surface and brain anatomy. Thus, a pre-operative patient representation (POPR) is planned. During the surgical procedure the patient's head is illuminated by structured light and stereo-video pictures obtained from two television cameras mounted above the head. The system is calibrated and registered with the POPR using a chamfered matching algorithm. The locator is also tracked in space by the video system, and its tip position shown in relation to the POPR on the video monitor
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