Statistical shape models of cuboid, navicular and talus bones.
BACKGROUND
The aim was to develop statistical shape models of the main human tarsal bones that would result in novel representations of cuboid, navicular and talus.


METHODS
Fifteen right and 15 left retrospectively collected computed tomography data sets from male individuals, aged from 17 to 63 years, with no known foot pathology were collected. Data were gathered from 30 different subjects. A process of model building includes image segmentation, unifying feature position, mathematical shape description and obtaining statistical shape geometry.


RESULTS
Orthogonal decomposition of bone shapes utilising spherical harmonics was employed providing means for unique parametric representation of each bone. Cross-validated classification results based on parametric spherical harmonics representation showed high sensitivity and high specificity greater than 0.98 for all considered bones.


CONCLUSIONS
The statistical shape models of cuboid, navicular and talus created in this work correspond to anatomically accurate atlases that have not been previously considered. The study indicates high clinical potential of statistical shape modelling in the characterisation of tarsal bones. Those novel models can be applied in medical image analysis, orthopaedics and biomechanics in order to provide support for preoperative planning, better diagnosis or implant design.
Department of Biomedical Engineering, Wroclaw University of Science and Technology, 50370, Wybrzeze Wyspianskiego, Wroclaw, Poland.
Aleksandra U
AU
Melinska
Regional Specialist Hospital, Research and Development Centre, Chair of Orthopaedics, Kamienskiego, Wroclaw, 24105 Poland.
Patryk
P
Romaszkiewicz
Department of General Radiology, Interventional Radiology and Neuroradiology, Chair of Radiology, Wroclaw Medical University, Borowska, Wroclaw, 24105 Poland.
Justyna
J
Wagel
Department of Biomedical Engineering, Wroclaw University of Science and Technology, 50370, Wybrzeze Wyspianskiego, Wroclaw, Poland.
Bartlomiej
B
Antosik
Department of General Radiology, Interventional Radiology and Neuroradiology, Chair of Radiology, Wroclaw Medical University, Borowska, Wroclaw, 24105 Poland.
Marek
M
Sasiadek
Department of Biomedical Engineering, Wroclaw University of Science and Technology, 50370, Wybrzeze Wyspianskiego, Wroclaw, Poland.
D Robert
DR
Iskander
D000293:Adolescent; D000328:Adult; D006801:Humans; D008297:Male; D008875:Middle Aged; D008953:Models, Anatomic; D015233:Models, Statistical; D012189:Retrospective Studies; D013628:Talus / Q000033:anatomy & histology*; D013639:Tarsal Bones / Q000033:anatomy & histology*; D055815:Young Adult
Bone model; Calcaneus; Cuboid; Morphometry; Navicular; Shape modelling; Spherical harmonics; Talus