Kimerly A Powell1, Tong Liang2, Brad Hittle3, Don Stredney3,4, Thomas Kerwin3, Gregory J Wiet5. 1. Department of Biomedical Informatics, The Ohio State University, Columbus, OH, 43210, USA. kimerly.powell@osumc.edu. 2. Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH, USA. 3. Ohio Supercomputer Center, Columbus, OH, USA. 4. Department of Otolaryngology, The Ohio State University, Columbus, OH, USA. 5. Department of Otolaryngology, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, USA.
Abstract
PURPOSE: To develop a time-efficient automated segmentation approach that could identify critical structures in the temporal bone for visual enhancement and use in surgical simulation software. METHODS: An atlas-based segmentation approach was developed to segment the cochlea, ossicles, semicircular canals (SCCs), and facial nerve in normal temporal bone CT images. This approach was tested in images of 26 cadaver bones (13 left, 13 right). The results of the automated segmentation were compared to manual segmentation visually and using DICE metric, average Hausdorff distance, and volume similarity. RESULTS: The DICE metrics were greater than 0.8 for the cochlea, malleus, incus, and the SCCs combined. It was slightly lower for the facial nerve. The average Hausdorff distance was less than one voxel for all structures, and the volume similarity was 0.86 or greater for all structures except the stapes. CONCLUSIONS: The atlas-based approach with rigid body registration of the otic capsule was successful in segmenting critical structures of temporal bone anatomy for use in surgical simulation software.
PURPOSE: To develop a time-efficient automated segmentation approach that could identify critical structures in the temporal bone for visual enhancement and use in surgical simulation software. METHODS: An atlas-based segmentation approach was developed to segment the cochlea, ossicles, semicircular canals (SCCs), and facial nerve in normal temporal bone CT images. This approach was tested in images of 26 cadaver bones (13 left, 13 right). The results of the automated segmentation were compared to manual segmentation visually and using DICE metric, average Hausdorff distance, and volume similarity. RESULTS: The DICE metrics were greater than 0.8 for the cochlea, malleus, incus, and the SCCs combined. It was slightly lower for the facial nerve. The average Hausdorff distance was less than one voxel for all structures, and the volume similarity was 0.86 or greater for all structures except the stapes. CONCLUSIONS: The atlas-based approach with rigid body registration of the otic capsule was successful in segmenting critical structures of temporal bone anatomy for use in surgical simulation software.
Entities:
Keywords:
Atlas-based segmentation; Image registration; Surgical simulation; Temporal bone anatomy
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