University of Twente Student Theses
Segmentation and determination of the joint space width in feet radiographs with use of active appearance models
Muinck Keizer, Daan Maarten de (2015) Segmentation and determination of the joint space width in feet radiographs with use of active appearance models.
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| Abstract: | This report describes the different steps and subjects needed for setting up, and the functioning of a computer model of the foot which will be used for segmentation of the metatarsalia and the proximal phalanxes in feet radiographs. This model will be based on pre-trained active appearance models with 100 training iterations and ten training images. The steps needed to calculate the joint space width in the metatarsophalangeal and proximal interphalangeal joints from the results of the foot model are also described in this report. The results show that the foot model with the used settings is capable of segmenting 55% of the bone contour lines and 82% of the so called bone contourboxes correctly on a test set of ten different feet radiographs. The results for the calculation of the joint space width show that the difference between the mathematical modus of the separate distances from which the joint space width is calculated and the result for the joint space width itself is maximal 6,8%. In addition the maximum mean difference between the separate distances from which the joint space width is calculated and the result for the joint space width itself is at maximum 0,6%. |
| Item Type: | Essay (Bachelor) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Programme: | Electrical Engineering BSc (56953) |
| Link to this item: | https://purl.utwente.nl/essays/93896 |
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