Craniotomy and clipping of intracranial aneurysm in a stereoscopic virtual reality environment.
ABSTRACT The release of results of International Subarachnoid Aneurysm Trial in 2003 caused a shift in the paradigm of management of ruptured intracranial aneurysms. The cases selected for microsurgical clipping nowadays are usually those patients with aneurysms that are not suitable for embolization, and are often complex and difficult. We devised an innovative application of operative planning and training for craniotomy and microsurgical clipping of intracranial aneurysms in a stereoscopic virtual reality environment.
Patient-specific Digital Imaging and Communications in Medicine data from computed tomographic angiography of the intracranial circulation and cranium were transferred to the workstation (Dextroscope; Volume Interactions Pte. Ltd., Singapore, Singapore). An aneurysm clip database was loaded into the patient data set. Three-dimensional volume rendering was followed by data coregistration and fusion.
Virtual head positioning and craniotomy were carried out to simulate the microscopic visualization. Clip selection could be carried out with reference to the angle of application. This allows one to see the exposure and degree of obliteration of an aneurysm with the various angles of approach.
The virtual craniotomy and microsurgical clipping application simulated the operative environment. Its role in neurosurgical training is encouraging and should be further developed.
- SourceAvailable from: Lap Ki Chan
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- "Moreover, computers cost a lot less than gross anatomists. With rapidly progressing technology, even dissection and surgical planning and training are possible on computer (Spitzer & Whitlock, 1998; Spicer & Apuzzo, 2003; Wong et al., 2007). Computer technology has a great impact on anatomy education. "
ABSTRACT: Living anatomy, defined as the anatomy revealed on living humans, is gaining importance in modern anatomy education, and has even been considered to replace cadaver-based anatomy study. We discussed the modalities through which living anatomy can be studied and explore the feasibility of using them to replace cadaver-based anatomy. We believe that the study of anatomy via the three main modalities of living anatomy, namely, surface anatomy, medical imaging and surgical procedures, rely on a foundation of sound knowledge of the three-dimensional anatomy. While a cadaver is still the best study material for the construction of a three-dimensional image of human anatomy, considering the pressure to reduce the hours geared towards anatomy education, education in anatomy in 21 st century must be revolutionized to utilize the state-of–the-art modalities to formulate a contemporary anatomy course. Such modalities allow students to carry on self –directed learning, leading to a positive outcome in anatomy education. The problem arises if we have to incorporate more living anatomy, the time necessary for dissection needs to be minimized or compromised. We sincerely believe that the time has come to address this issue in the anatomy curriculum.
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ABSTRACT: The research described in this thesis had 2 main goals. The first goal was to evaluate the clinical results of the Excimer Laser Assisted Non-occlusive Anastomosis (ELANA) technique. The most important subgroups of patients were separately evaluated in the first part of this thesis (chapters 2 to 5). The second main goal was to further develop the ELANA technique towards a less invasive, easier, faster, but equally safe anastomosis technique. The developmental steps which were taken were described in the second part of this thesis (chapters 6 to 10)
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ABSTRACT: Stability, involving two measures, of a class of impulsive stochastic systems is investigated. Sufficient conditions for stability are obtained using Lyapunov-like functions and differential inequalitiesSoutheastcon '96. 'Bringing Together Education, Science and Technology'., Proceedings of the IEEE; 05/1996