Paper Info
Title
Segmentation of risk structures for otologic surgery using the Probabilistic Active Shape Model (PASM)
Abstract
Our research project investigates a multi-port approach for minimally-invasive otologic surgery. For planning such a surgery, an accurate segmentation of the risk structures is crucial. However, the segmentation of these risk structures is a challenging task: The anatomical structures are very small and some have a complex shape, low contrast and vary both in shape and appearance. Therefore, prior knowledge is needed which is why we apply model-based approaches. In the present work, we use the Probabilistic Active Shape Model (PASM), which is a more flexible and specific variant of the Active Shape Model (ASM), to segment the following risk structures: cochlea, semicircular canals, facial nerve, chorda tympani, ossicles, internal auditory canal, external auditory canal and internal carotid artery. For the evaluation we trained and tested the algorithm on 42 computed tomography data sets using leave-one-out tests. Visual assessment of the results shows in general a good agreement of manual and algorithmic segmentations. Further, we achieve a good Average Symmetric Surface Distance while the maximum error is comparatively large due to low contrast at start and end points. Last, we compare the PASM to the standard ASM and show that the PASM leads to a higher accuracy.
Year
DOI
Venue
2014
10.1117/12.2043411
Proceedings of SPIE
Keywords
Field
DocType
Active Shape Model,segmentation,temporal bone,minimally-invasive surgery,otologic surgery
Active shape model,Computer vision,Ossicles,Data set,Segmentation,Maximum error,Artificial intelligence,Computed tomography,Anatomical structures,Probabilistic logic,Surgery,Physics
Conference
Volume
ISSN
Citations 
9036
0277-786X
3
PageRank 
References 
Authors
0.38
7
3
Name
Order
Citations
PageRank
Meike Becker162.11
matthias kirschner28410.50
Georgios Sakas329249.61