DocumentCode :
2805848
Title :
A statistical description of the articulating ulna surface for prosthesis design
Author :
van de Giessen, Martijn ; Smitsman, Nienke ; Strackee, Simon D. ; Van Vliet, Lucas J. ; Grimbergen, Kees A. ; Streekstra, Geert J. ; Vos, Frans M.
Author_Institution :
Quantitative Imaging Group, Delft Univ. of Technol., Delft, Netherlands
fYear :
2009
fDate :
June 28 2009-July 1 2009
Firstpage :
678
Lastpage :
681
Abstract :
The design of most ulnar head implants is currently not based on studies of anatomical variations. To enable prosthesis design based on anatomical features, a method is developed for the detection of the ulna surface that articulates with the radius head. The articulating surface is detected by combining partial articulating ulna surfaces detected in CT scans of different individuals in different poses. Correspondences between ulnae of different individuals are established through the construction of a statistical shape model (SSM) of the ulna head. The articulating surface is attached to this SSM, allowing the detection of articulating surfaces in ulnae that are not in the training set of the model. As a simple shape is desirable for prosthesis design, three quadratic surfaces were fitted to the articulating surfaces of 40 ulnae. The mean fitting error for the simplest surface, a cylinder, was 0.20 mm. As this error is smaller than the voxel size of 0.3 mm isotropic, it was concluded that the articulating ulna surface can be satisfactory approximated by a cylinder part.
Keywords :
anthropometry; biomechanics; bone; computerised tomography; medical image processing; prosthetics; statistical analysis; CT scans; anatomy based prosthesis design; articulating ulna surface detection; partial articulating ulna surfaces; quadratic surfaces; radius head; statistical analysis; statistical shape model construction; ulnar head implant design; Biomedical imaging; Bones; Computed tomography; Head; Implants; Joints; Prosthetics; Shape; Surface fitting; Wrist; Articulating surface; CT; Prosthesis; Quadratic surface; Skeletal model; Statistical shape model;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Imaging: From Nano to Macro, 2009. ISBI '09. IEEE International Symposium on
Conference_Location :
Boston, MA
ISSN :
1945-7928
Print_ISBN :
978-1-4244-3931-7
Electronic_ISBN :
1945-7928
Type :
conf
DOI :
10.1109/ISBI.2009.5193138
Filename :
5193138
Link To Document :
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