Stereotactic biopsies guided by an optical navigation system: technique and clinical experience

Minimally Invasive Neurosurgery : MIN
P GrunertN Hopf

Abstract

Frame-based stereotactic biopsies are time-consuming procedures making necessary head fixation in a ring, explicit coordinate calculation and setting of the parameters. Frameless systems make many of these intermediate steps unnecessary, impose less mechanical restrictions regarding access to the lesions, and with slight modifications can be used to perform stereotactic biopsies. A special adaptation designed to fix the holder and the biopsy instrument is described. The neuronavigation optical tracking system of Radionics was used. CT scans were performed with 6 skin markers. Calibration was performed after head fixation in the Mayfield clamp. Mean calibration error was 2.19 +/- 0.81 mm. The light-emitting diode holder of the pointer was fixed into 2 Leila arms and moved under visual control based on CT images. The target point was selected, Leila arms fixed and a burr hole performed. The cannula was introduced to the target, being fitted with a depth stop in a length identical to that of the pointer on the screen. If necessary a second trajectory was easily selected. 49 patients underwent a frameless stereotactic biopsy. All targets except seven were superficial or in the white matter. In selected cases the biopsies were taken...Continue Reading

Citations

Oct 2, 2009·Future Oncology·Sanjeev ChawlaHarish Poptani
Apr 15, 2003·Journal of Neurosurgery·Leonardo FrighettoDennis Chute
Sep 1, 2007·Minimally Invasive Therapy & Allied Technologies : MITAT : Official Journal of the Society for Minimally Invasive Therapy·Reto Bale, Gerlig Widmann
Sep 19, 2012·British Journal of Neurosurgery·Georgios TsermoulasNicholas Ross
Nov 15, 2011·The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS·Gerlig WidmannReto Bale
Jun 7, 2006·Minimally Invasive Therapy & Allied Technologies : MITAT : Official Journal of the Society for Minimally Invasive Therapy· Caversaccio, Freysinger
Jul 23, 2011·Stereotactic and Functional Neurosurgery·Alessandro FratiMaurizio Salvati
Jun 28, 2018·European Radiology·Xiangmeng HeChengli Li

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