).Endoscopes and neuronavigation systems are becoming more and more popular as adjunctive tools during microscopic neurosurgical operations. 1-11 However, the current integration of the endoscope or the neuronavigation system in a microneurosurgical environment is still based on what can be described as a serial combination. This type of combination is not ergonomically efficient due to the need of changing the visual field of the operating surgeon from the microscopic image displayed in the microscope oculars to the endoscopic images displayed on the endoscopy monitor, or to the neuronavigation's screen. A more ergonomically efficient combination of these imaging platforms is what could be called the parallel integration, where about these image modalities are displayed simultaneously and at will on a single main viewing platform.In this report, we tested and analyzed, in a cadaveric model, the technical features and the potential applicability of a new way of integrating the microscope, the endoscope, and the neuronavigation; in a parallel fashion by utilizing a new technology, the BiOpix (CCA Medical, Milford, OH) high definition (HD) picture-in-picture image injection system. This new technology allows parallel combination of the endoscope and microscope by allowing real-time display of high-resolution endoscopic and/or neuronavigation images in both microscope oculars, thus theoretically making the use of the endoscope and of the neuronavigation system more efficient and more ergonomic during microsurgery.
Materials and Methods
Preparation of Cadaveric HeadsWe used six fresh cadaver heads injected with colored silicone, and implanted with eight adhesive scalp fiducials. The specimens then underwent computed tomographic imaging using the following protocol: slice thickness, 1-mm,
Keywords► endoscope ► image-guided surgery ► microneurosurgery ► medical technology ► skull base surgery Abstract Endoscope, microscope, and neuronavigation systems are integrated in neurosurgical procedures mainly by using a serial combination algorithm, where, the user must switch his/her field of view from one platform display to another. The integration of theses devices could be optimized by incorporating different displays into one viewing platform thus achieving a parallel combination. In this study, we investigated the feasibility and the applicability of parallel integration of microscopic, endoscopic, and neuronavigation images by real time displaying the endoscope and neuronavigation image datasets in the main operative microscope oculars. The proposed set-up was effective in displaying the three images dataset in an operationally actionable mode. Ergonomically, the ability of using the different image dataset without the need of taking the eyes off the microscope oculars did not disrupt the flow or the tempo of the operative procedure. However, new endoscopes specific to this application are recommended.