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Endoscopic third ventriculostomy is a minimally invasive surgical technique to treat hydrocephalus; a condition
where patients suffer from excessive amounts of cerebrospinal fluid (CSF) in the ventricular system of their
brain. This technique involves using a monocular endoscope to locate the third ventricle, where a hole can be
made to drain excessive fluid. Since a monocular endoscope provides only a 2D view, it is difficult to make this
perforation due to the lack of monocular cues and depth perception. In a previous study, we had investigated
the use of a stereo-endoscope to allow neurosurgeons to locate and avoid hazardous areas on the surface of the
third ventricle. In this paper, we extend our previous study by developing a new methodology to evaluate the
targeting performance in piercing the hole in the membrane. We consider the accuracy of this surgical task and
derive an index of performance for a task which does not have a well-defined position or width of target. Our
performance metric is sensitive and can distinguish between experts and novices. We make use of this metric to
demonstrate an objective learning curve on this task for each subject.
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Kamyar Abhari, Sandrine de Ribaupierre, Terry Peters, Roy Eagleson, "Does stereo-endoscopy improve neurosurgical targeting in 3rd ventriculostomy?," Proc. SPIE 7966, Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment, 796615 (3 March 2011); https://doi.org/10.1117/12.877897