title: Virtual endoscopy for planning neuro-endoscopic intraventricular surgery.
abstract: To evaluate the usefulness of virtual endoscopy (VE) in planning neuroendoscopic intraventricular surgeries, the technique was applied in 20 of 22 consecutive procedures. Thirteen endoscopic third ventriculostomies (ETV) in 12 patients, 3 endoscopic colloid cyst removals, 1 third ventricular arachnoidal cyst fenestration, 1 endoscopic ventricul-cysto-cisternostomy (suprasellar arachnoidal cyst), 1 endoscopic tumor biopsy, one third ventricular gross total tumor removal and 2 septostomies at the foramen of Monro due the septal occlusion were performed. Contrast medium-enhanced MR images (3DMPRAGE, Siemens, Germany) were semi-automatically segmented with a surface-rendering technique ("Navigator" software, General Electric Medical, Buc, France) to produce the virtual endoluminal views. Surgery was performed with cerebral ventriculoscopes by Wolf (Richard Wolf, Knittlingen, Germany). VE was feasible in all patients and the virtual endoscopic images were comparable with the real intraventricular views obtained by standard rod lens systems. After contrast medium administration intra- and paraventricular vessels such as the thalamocaudate vein, the septal veins, the basilar artery and its branches (distal BA complex) and the choroid plexus were identified on the virtual endoscopic images. In 8 patients, the additional anatomic information provided by VE profoundly influenced surgical planning. VE provides the neurosurgeon with additional morphological information supporting the planning process of neuroendoscopic intraventricular surgeries, contributing to the safety of the procedures.
authors.affiliation: Department of Neurosurgery, University Hospital Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria. johannes.burtscher@uibk.ac.at
authors.forename: Johannes
authors.initials: J
authors.lastname: Burtscher
authors.forename: R
authors.initials: R
authors.lastname: Bale
authors.forename: A
authors.initials: A
authors.lastname: Dessl
authors.forename: W
authors.initials: W
authors.lastname: Eisner
authors.forename: K
authors.initials: K
authors.lastname: Twerdy
authors.forename: R A
authors.initials: RA
authors.lastname: Sweeney
authors.forename: S
authors.initials: S
authors.lastname: Felber
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001927:Brain Diseases / Q000601:surgery; D002552:Cerebral Ventricles / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D004724:Endoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000379:methods*; D015203:Reproducibility of Results; D025321:Surgery, Computer-Assisted; D016896:Treatment Outcome; D014584:User-Computer Interface; D014696:Ventriculostomy