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Erschienen in: International Journal of Computer Assisted Radiology and Surgery 11/2018

03.08.2018 | Original Article

Extraction of open-state mitral valve geometry from CT volumes

verfasst von: Lennart Tautz, Mathias Neugebauer, Markus Hüllebrand, Katharina Vellguth, Franziska Degener, Simon Sündermann, Isaac Wamala, Leonid Goubergrits, Titus Kuehne, Volkmar Falk, Anja Hennemuth

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 11/2018

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Abstract

Purpose

The importance of mitral valve therapies is rising due to an aging population. Visualization and quantification of the valve anatomy from image acquisitions is an essential component of surgical and interventional planning. The segmentation of the mitral valve from computed tomography (CT) acquisitions is challenging due to high variation in appearance and visibility across subjects. We present a novel semi-automatic approach to segment the open-state valve in 3D CT volumes that combines user-defined landmarks to an initial valve model which is automatically adapted to the image information, even if the image data provide only partial visibility of the valve.

Methods

Context information and automatic view initialization are derived from segmentation of the left heart lumina, which incorporates topological, shape and regional information. The valve model is initialized with user-defined landmarks in views generated from the context segmentation and then adapted to the image data in an active surface approach guided by landmarks derived from sheetness analysis. The resulting model is refined by user landmarks.

Results

For evaluation, three clinicians segmented the open valve in 10 CT volumes of patients with mitral valve insufficiency. Despite notable differences in landmark definition, the resulting valve meshes were overall similar in appearance, with a mean surface distance of \(1.62 \pm 2.10\) mm. Each volume could be segmented in 5–22 min.

Conclusions

Our approach enables an expert user to easily segment the open mitral valve in CT data, even when image noise or low contrast limits the visibility of the valve.

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Metadaten
Titel
Extraction of open-state mitral valve geometry from CT volumes
verfasst von
Lennart Tautz
Mathias Neugebauer
Markus Hüllebrand
Katharina Vellguth
Franziska Degener
Simon Sündermann
Isaac Wamala
Leonid Goubergrits
Titus Kuehne
Volkmar Falk
Anja Hennemuth
Publikationsdatum
03.08.2018
Verlag
Springer International Publishing
Erschienen in
International Journal of Computer Assisted Radiology and Surgery / Ausgabe 11/2018
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI
https://doi.org/10.1007/s11548-018-1831-6

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