Becker, Meike ; Kirschner, Matthias ; Sakas, Georgios (2014)
Segmentation of Risk Structures for Otologic Surgery using the Probabilistic Active Shape Model.
Medical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling.
doi: 10.1117/12.2043411
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Becker, Meike ; Kirschner, Matthias ; Sakas, Georgios |
| Art des Eintrags: | Bibliographie |
| Titel: | Segmentation of Risk Structures for Otologic Surgery using the Probabilistic Active Shape Model |
| Sprache: | Englisch |
| Publikationsjahr: | 2014 |
| Verlag: | SPIE Press, Bellingham |
| Reihe: | Proceedings of SPIE; 9036 |
| Veranstaltungstitel: | Medical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling |
| DOI: | 10.1117/12.2043411 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | Forschungsgruppe Medical Computing (MECO), Operation planning, Computer assisted surgery, Minimally invasive surgery, Active shape models (ASM), Segmentation |
| Fachbereich(e)/-gebiet(e): | 20 Fachbereich Informatik 20 Fachbereich Informatik > Graphisch-Interaktive Systeme |
| Hinterlegungsdatum: | 12 Nov 2018 11:16 |
| Letzte Änderung: | 12 Nov 2018 11:16 |
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