University of Twente Student Theses
Eliminating global head movement during swallowing, to create a more objective, accurate and reproducible assessment of the swallowing function using videofluoroscopy
Gerkema, M.H. and Ketel, M.H.M. and Smits, E.P.J. and Stoel, M.D. van der (2015) Eliminating global head movement during swallowing, to create a more objective, accurate and reproducible assessment of the swallowing function using videofluoroscopy.
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| Abstract: | Aim: The standard diagnosis-tool for dysphagia is videofluoroscopy (VFS). The aim of this research is to make a start with developing a (semi)-automatic method to assess VFS, by eliminating the global head movement of subjects during swallowing. Method: We received VFS videos of eight healthy subjects from the Antoni van Leeuwenhoek hospital in Amsterdam. Fragments and subsequently frames were selected, showing different stages of the swallowing process. Using Matlab, we placed landmarks and segments on stable anatomical structures. After obtaining those coordinates, the frames were matched by the mesh-based warping algorithm. Results: In the frames transformed with mesh-based warping using segmentation, the movement of the head was almost eliminated. Although, the movement differed intersubjectively, the global head movement was eliminated in four fragments but still slightly present in two fragments. Conclusion: We concluded that the best method to nullify the global head movement is the mesh-based warping method using segmentation. The segmented areas must correspond with the same regions of interest as the placed landmarks: the vertebrae, the upper and lower jaw, the back of the head, the orbit and the coin on the throat must be segmented and uniformly spread across the whole frame. |
| Item Type: | Essay (Bachelor) |
| Clients: | Antoni van Leeuwenhoek Ziekenhuis, Amsterdam, Nederland |
| Faculty: | TNW: Science and Technology |
| Subject: | 44 medicine, 50 technical science in general |
| Programme: | Technical Medicine BSc (50033) |
| Link to this item: | https://purl.utwente.nl/essays/67376 |
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