A Computer-based, Interactive Tool for Semi-Automatic Extraction, Visualization and Pre-operative Assessment of the Inner Ear

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A Computer-based, Interactive Tool for Semi-Automatic Extraction, Visualization and Pre-operative Assessment of the Inner Ear

http://libir.tmu.edu.tw/bitstream/987654321/22248/1/20_S1517708_A+Computer-based,+Interactive+Tool+for+Semi-Automatic+Extraction,Visualization+and+Pr.pdf

In this paper a new method that enables semi-automatic feature extraction and visualization of inner ear structures, including the cochlea, is presented. The system offers an interactive, computer-based assessment tool for pre-operative evaluation and surgical planning of maximally invasive procedures, such as for cochlear implantation. The user is able to segment the cochlea and surrounding landmarks with minimal input to generate a three-dimensional display of the region for interactive analysis of patient morphology. Spiral CT scans of the temporal bone are input to the image processing and visualization pipeline which is implemented in ITK and VTK respectively. A connected threshold region growing algorithm is then applied for semi-automatic extraction of structures of interest. Results of this process are verified using a supervised approach. Following segmentation, surface-and volume-based visualizations are displayed, with image scans superimposed for landmark evaluation. The software is currently in use as a supplementary tool for planning access paths and optimal implant trajectories for cochlear implantation, yet other clinical applications would also be feasible.