title: Comparison of geometry-based and CT voxel-based finite element modelling and experimental validation.
abstract: The objectives of the paper presented here is the comparison of a geometry-based and voxel-based finite element (FE) method preprocessor of the human femur. The models were experimentally validated by strain gauge measurements (principal stress). The correlation coefficients (r) between the three methods (geometry-based FEM, voxel-based FEM, strain gauge measurements) were found to be in the range 0.91-0.94 (r2: 0.84-0.88). The relationships between the samples are highly significant (P = 0.001), where the strain gauge results are the independent variables. These results suggest that the validity with respect to the principal stress of a voxel-based modelling is similar to the validity of geometry-based modelling. In summary, therefore, we conclude that voxel-based meshing allows a straightforward interfacing with computerized tomography (CT) scans and might contribute to a clinically applicable FEM technology.
authors.affiliation: Department of Orthopaedic Surgery, Philipps-University of Marburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Lengsfeld
authors.forename: J
authors.initials: J
authors.lastname: Schmitt
authors.forename: P
authors.initials: P
authors.lastname: Alter
authors.forename: J
authors.initials: J
authors.lastname: Kaminsky
authors.forename: R
authors.initials: R
authors.lastname: Leppek
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D005260:Female; D005269:Femur / Q000033:anatomy & histology* / Q000000981:diagnostic imaging* / Q000502:physiology; D020342:Finite Element Analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data