Ms. Emily Rae Profile

Emily Rae

at Lab for Percutaneous Surgery

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Proceedings Article | 13 March 2018 Presentation + Paper

Neurosurgical burr hole placement using the Microsoft HoloLens

Emily Rae, Andras Lasso, Matthew Holden, Evelyn Morin, Ron Levy, Gabor Fichtinger

Proceedings Volume 10576, 105760T (2018) https://doi.org/10.1117/12.2293680

KEYWORDS: 3D modeling, Holograms, Head, Navigation systems, Computed tomography, Holography, Surgery, Augmented reality, Skull

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PURPOSE: Tracked navigation systems are generally impractical in bedside neurosurgical procedures, such as a twist-drill crainiostomy for the removal of a subdural hematoma, where the use of navigation could optimize the placement of the drill in relation to the underlying fluid. We use the Microsoft HoloLens to display a hologram floating in the patient’s head to mark a burr hole on the skull. METHODS: A 3D model of the head, hematoma and burr hole is created from CT and imported to the HoloLens. The hologram is interactively registered to the patient and the burr hole is marked on the skull. 3D Slicer, Unity, and Visual Studio were used for software development. The system was tested by 6 inexperienced and 1 experienced users. They each performed 6 registrations on phantoms with fiducial markers placed at 3 plausible burr hole locations on each side of the head. Registration accuracy was determined by measuring the distance between the holographic and physical markers. RESULTS: Inexperienced users placed 98% of the markers within the clinically acceptable range of 10 mm in an average time of 4:46 min. The experienced user placed 100% of the markers within the acceptable range in an average time of 2:52 min. CONCLUSION: It is feasible to mark a neurosurgical burr hole location with clinically acceptable accuracy using the Microsoft HoloLens, within an acceptable length of time. This technology may also prove useful for procedures that require higher accuracy of drill location and drain trajectory such as the placement of external ventricular drains.

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