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Proceedings Paper

Intraoperative measurements on the mitral apparatus using optical tracking: a feasibility study
Author(s): Sandy Engelhardt; Raffaele De Simone; Diana Wald; Norbert Zimmermann; Sameer Al Maisary; Carsten J. Beller; Matthias Karck; Hans-Peter Meinzer; Ivo Wolf
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Paper Abstract

Mitral valve reconstruction is a widespread surgical method to repair incompetent mitral valves. During reconstructive surgery the judgement of mitral valve geometry and subvalvular apparatus is mandatory in order to choose for the appropriate repair strategy. To date, intraoperative analysis of mitral valve is merely based on visual assessment and inaccurate sizer devices, which do not allow for any accurate and standardized measurement of the complex three-dimensional anatomy. We propose a new intraoperative computer-assisted method for mitral valve measurements using a pointing instrument together with an optical tracking system. Sixteen anatomical points were defined on the mitral apparatus. The feasibility and the reproducibility of the measurements have been tested on a rapid prototyping (RP) heart model and a freshly exercised porcine heart. Four heart surgeons repeated the measurements three times on each heart. Morphologically important distances between the measured points are calculated. We achieved an interexpert variability mean of 2.28 +/- 1:13 mm for the 3D-printed heart and 2.45 +/- 0:75 mm for the porcine heart. The overall time to perform a complete measurement is 1-2 minutes, which makes the method viable for virtual annuloplasty during an intervention.

Paper Details

Date Published: 12 March 2014
PDF: 7 pages
Proc. SPIE 9036, Medical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling, 90361L (12 March 2014); doi: 10.1117/12.2043391
Show Author Affiliations
Sandy Engelhardt, German Cancer Research Ctr. (DKFZ) (Germany)
Raffaele De Simone, Univ. of Heidelberg (Germany)
Diana Wald, German Cancer Research Ctr. (DKFZ) (Germany)
Norbert Zimmermann, Univ. of Heidelberg (Germany)
Sameer Al Maisary, Univ. of Heidelberg (Germany)
Carsten J. Beller, Univ. of Heidelberg (Germany)
Matthias Karck, Univ. of Heidelberg (Germany)
Hans-Peter Meinzer, German Cancer Research Ctr. (DKFZ) (Germany)
Ivo Wolf, German Cancer Research Ctr. (DKFZ) (Germany)
Mannheim Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 9036:
Medical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling
Ziv R. Yaniv; David R. Holmes, Editor(s)

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