Virtual neuroendoscopy, a comparative magnetic resonance and anatomical study
Department of Neurosurgery, Univ. Hospital Innsbruck, Austria.min - Minimally Invasive Neurosurgery (Impact Factor: 1.14). 10/1999; 42(3):113-7. DOI: 10.1055/s-2008-1053381
We evaluated the usefulness and reliability of intraventricular virtual neuroendoscopy based on a comparative anatomical study. Virtual intraventricular endoscopic images were calculated from 3D magnetic resonance images in five anatomic specimens. Contiguous 1.2 mm slices of the specimen heads were acquired at a 1.5 T MR scanner using a 3D-gradient echo sequence. The images were then transferred to an independent 3D-workstation (Sun Spark 20). After scanning the specimen heads, real endoscopy within the cerebral ventricles of these brains was performed with a standard rod lens system. Comparison between real and virtual endoscopic views of the intraventricular topography was based on the same anatomical reference and landmarks. Acquisition of MR data and virtual image post-processing have been possible in all specimens. The virtual endoscopic images of the ventricles were comparable to the intraventricular views obtained by a standard rod lens system. Virtual intraventricular neuroendoscopy can be employed for planning and simulating neuroendoscopic procedures. It enables the neurosurgeon to simulate the endoscopic procedure within the cerebral ventricles on the basis of the patient's individual anatomy prior to surgery.
- [Show abstract] [Hide abstract]
ABSTRACT: The demand on virtual planning systems is increasing, in particular for technical pretentious surgical interventions such as intracranial endoscopy. In this paper, a new virtual system for neuroendoscopy is presented. The main purpose of this system is to provide support for the planning and training of neuroendoscopic interventions. The software is applied for virtual endoscopic visualization of three-dimensional magnetic resonance data sets, using a clinical magnetic resonance scanner. Rendering is performed on a Hewlett-Packard unix workstation. Virtual endoscopy provides a three-dimensional view of the cerebral ventricles with good visualization of anatomic details. The rendering system used allows the generation of fly-through sequences through the entire ventricular system in real-time. Navigation is controlled by mouse movements. The visualization of the computer generated intraventricular spaces is adapted to the characteristics of the optical endoscope. The presented virtual neuroendoscopy system is a promising tool for planning and training of neuroendoscopic procedures. It provides the ability to simulate these procedures based on the patient's individual anatomy, prior to surgery. Zusammenfassung: Der Bedarf an virtuellen Planungssystemen ist stetig steigend, insbesondere fr technisch aufwendige Operationen wie die intrakranielle Endoskopie. Die Autoren prsentieren ein neues virtuelles Planungssystem fr die Neuroendoskopie. Das Hauptanwendungsgebiet dieses Systems liegt sowohl in der Planung als auch im Training von neuroendoskopischen Eingriffen. Grundlage fr die virtuelle endoskopische Visualisierung sind dreidimensionale Kernspindatenstze, die mit einem klinischen Kernspintomographen erzeugt werden. Die Nachbearbeitung erfolgt auf einer Hewlett-Packard Unix Workstation. Die virtuelle Endoskopie bietet eine dreidimensionale Ansicht des Ventrikelsystems. Anatomische Details kommen hierbei gut zur Darstellung. Das verwendete Rendering-System erlaubt die Generation von "fly-through"-Sequenzen durch das gesamte Ventrikelsystem in Echtzeit. Die Navigation erfolgt mit Hilfe von Mausbewegungen. Die Visualisierung der computergenerierten intraventrikulren Rume ist an die Charakteristika des optischen Endoskops angepasst. Das vorgestellte virtuelle Neuroendoskopiesystem ist ein vielversprechendes Werkzeug fr die Planung und das Training von neuroendoskopischen Eingriffen. Es bietet die Mglichkeit, diese Eingriffe, basierend auf der individuellen Patientenanatomie, vor der Operation zu simulieren.Clinical Neuroradiology 01/2000; 10(4):153-160. DOI:10.1007/PL00022530 · 2.25 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: Virtual endoscopy was used to plan 10 endoscopic third ventriculostomy procedures in 9 patients suffering from occlusive hydrocephalus due to idiopathic aqueductal stenosis and tumors. The patients were 4 children (4-14 years, mean age: 9 years) and 5 adults (21-38 years, mean age: 29 years). The aim of the study was to preoperatively evaluate the individual intraventricular and vascular endoscopic anatomy at the floor of the third ventricle based on virtual endoscopic images. The virtual views were correlated with the real endoscopic images, intraoperatively obtained by a standard ventriculoscope (Wolf, Knittlingen, Germany) during endoscopic third ventriculostomy procedures. Contrast-medium-enhanced MR images (3D-MPRAGE; Siemens, Germany) were semiautomatically segmented with a surface-rendering technique ('Navigator' software; General Electric Medical, Buc, France) to produce the virtual endoluminal views. The virtual endoscopic images were comparable with the real intraoperative endoscopic view in 8 of 9 patients. Virtual endoscopy can display the position of the basilar artery, the posterior cerebral arteries and the posterior communicating arteries in their relationship to the mammillary bodies and the clivus. Preoperative virtual endoscopy planning can intraoperatively assist the neurosurgeon to find a safe location for third ventriculostomy.Pediatric Neurosurgery 03/2000; 32(2):77-82. DOI:10.1159/000028903 · 0.33 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: Objective The demands on virtual planning systems are increasing, particularly for technically pretentious surgical interventions such as intracranial endoscopy. In this article, a new virtual system for neuroendoscopy (VIVENDI) is presented. The main purpose of this system is to provide support for planning and training in neuroendoscopic interventions.Materials and Methods The software is applied for virtual endoscopic visualization of three-dimensional magnetic resonance datasets, using a clinical magnetic resonance scanner. Rendering is performed on a Hewlett-Packard UNIX workstation.ResultsVirtual endoscopy provides a three-dimensional view of the cerebral ventricles, with good visualization of anatomic details. The rendering system used allows the generation of fly-through sequences for the entire ventricular system in real time. Navigation is controlled by mouse movements, and the visualization of the computer-generated intraventricular spaces is adapted to the characteristics of the optical endoscope.Conclusions The presented virtual neuroendoscopy system is a promising tool for planning and training in neuroendoscopic procedures. It enables these procedures to be simulated prior to surgery based on the patient's individual anatomy. Comp Aid Surg 6:77–84 (2001). © 2001 Wiley-Liss, Inc.Computer Aided Surgery 01/2001; 6(2):77 - 84. DOI:10.1002/igs.1011 · 0.69 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.