Artikel
Image-guided surgical microscope with integrated minitracker
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Veröffentlicht: | 22. September 2005 |
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Gliederung
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Surgical microscopy is used in many complex procedures in the area of otorhinolaryngology. Here we present a new imag-guided microscope system using augmented reality image overlays directly added onto one of the views of the operating microscope (Leica M500). With this system, segmented objects, outlines of risk regions or access pathways, previously extracted from preoperative tomographic images can be directly displayed as augmented reality overlays on the microscope image. Unlike other systems that uses an external tracking device, or based on the image information, the novelty of this design consists in mounting a precise mini-tracker (Actracsys, Lausanne) directly on the microscope, in parallel to the optical axis, to track the movements of the surgical tools and the patient. The rigid connection of the tracker with the microscope (Patent Ref. Nr: 0299-001.B.CH-P) eliminates the need to externally track the position of the microscope, thereby bypassing the greatest source of error. Besides the gain in accuracy (theoretical: 0,8 mm; cadaver heads: 1,3mm),
this setup offers an improved ergonomy since the new location of the tracker makes it much easier for the surgeon to keep the line of sight to the tracked objects unobstructed.