title: Generation of an atlas of the proximal femur and its application to trabecular bone analysis.
abstract: Automatic placement of anatomically corresponding volumes of interest and comparison of parameters against a standard of reference are essential components in studies of trabecular bone. Only recently, in vivo MR images of the proximal femur, an important fracture site, could be acquired with high-spatial resolution. The purpose of this MRI trabecular bone study was two-fold: (1) to generate an atlas of the proximal femur to automatically place anatomically corresponding volumes of interest in a population study and (2) to demonstrate how mean models of geodesic topological analysis parameters can be generated to be used as potential standard of reference. Ten females were used to generate the atlas and geodesic topological analysis models, and 10 females were used to demonstrate the atlas-based trabecular bone analysis. All alignments were based on three-dimensional (3D) multiresolution affine transformations followed by 3D multiresolution free-form deformations. Mean distances less than 1 mm between aligned femora, and sharp edges in the atlas and in fused gray-level images of registered femora indicated that the anatomical variability was well accommodated and explained by the free-form deformations.
authors: Grupo Tecnológico Santa Fe, SA de CV, Mexico City, Mexico. JCarballido@gtsf.com.mx
authors: Julio
authors: J
authors: Carballido-Gamio
authors: Jenny
authors: J
authors: Folkesson
authors: Dimitrios C
authors: DC
authors: Karampinos
authors: Thomas
authors: T
authors: Baum
authors: Thomas M
authors: TM
authors: Link
authors: Sharmila
authors: S
authors: Majumdar
authors: Roland
authors: R
authors: Krug
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D001271:Atlases as Topic; D005260:Female; D005264:Femoral Fractures / Q000175:diagnosis; D005269:Femur / Q000033:anatomy & histology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D010024:Osteoporosis / Q000175:diagnosis; D012016:Reference Values