Results 261 to 270 of about 127,031 (300)
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2010
This chapter reviews models for scattering of ultrasound by cancellous bone, methods for measuring scattering, and empirical results. Theory and measurements are presented for the dependence of backscatter on frequency and mean trabecular thickness. Additional topics discussed include the inverse problem (that is, estimating cancellous bone properties ...
Frédéric Padilla, Keith Wear
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This chapter reviews models for scattering of ultrasound by cancellous bone, methods for measuring scattering, and empirical results. Theory and measurements are presented for the dependence of backscatter on frequency and mean trabecular thickness. Additional topics discussed include the inverse problem (that is, estimating cancellous bone properties ...
Frédéric Padilla, Keith Wear
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Postyield behavior of subchondral trabecular bone
Journal of Biomedical Materials Research, 1976AbstractCylindrical specimens of bovine subchondral trabecular bone were tested to uniaxial compressive strain levels of 75% to study energy absorption during pore collapse. Stress–strain curves were characterized by macroscopic yield at about 8% strain followed by a significant horizontal pore collapse regime.
W C, Hayes, D R, Carter
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Biomechanical characteristics of human trabecular bone
Clinical Biomechanics, 1997OBJECTIVE: To evaluate the effect of strain rate (varepsilon), apparent density (rho(a)) and tissue density (rho(t)) on Young's modulus (E), strength (sigma(u)) and ultimate strain (varepsilon(u)) on intervertebral bone from a Chinese population. METHODS: Testing was performed by uniaxial compression at five strain rates on 36 human trabecular bone ...
J, Ouyang +4 more
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Trabecular Bone Microstructure Investigation
2014Assessment of bone histomorphometry allows to determine the condition of the bones and thus to predict the occurrence, course, treatment planning and recovery for certain conditions within the skeletal system. Noninvasive acquisition of information about the structure of the bone on the basis of image data makes it possible in a relatively fast and ...
Paulina Popik +6 more
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Surface curvatures of trabecular bone microarchitecture
Bone, 2002Microstructure of trabecular bone has been examined with a particular emphasis on surface curvatures in two-phase (trabecular and intertrabecular space- i.e., marrow space) structures. Three trabecular bone samples, quantified as "plate-like," "rod-like," and a mixture of these two structural elements according to the structure model index (SMI), were ...
H, Jinnai +5 more
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Composition of trabecular and cortical bone
The Anatomical Record, 1964AbstractA technique was devised for obtaining marrow‐free trabecular bone so that the trabecular and cortical bone composition of dog, steer, monkey and man could be studied. Vertebral body was cut in the frontal plane into slices 2 mm thick with an electric band saw.
J K, GONG, J S, ARNOLD, S H, COHN
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Local analysis of trabecular bone fracture
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Assessment of bone fracture risk is the first step in the prevention of traumatic events. In several previous study the use of bone mineral density and bone volume fraction was suggested for the identification of the failure zone, nonetheless the limits of this approach were also investigated, underling the need of other information to fully describe ...
Simone, Tassani +2 more
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Intramembranous trabecular generation in normal bone
Bone and Mineral, 1994The ability of trabeculae to reform following localized ablation may provide further insight into the sequence of events in cancellous regeneration. Histological features of cancellous repair were examined in the iliac crest of aged female sheep at intervals after removal of a 1-cm diameter biopsy.
J E, Aaron, T M, Skerry
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Computer Characterization of Trabecular Bone Pattern
1989The paper describes the instruments and the analysis method used in a preliminary study of osteoporosis on conventional X-ray films. Twenty cases have been studied by measuring the integral and the high frequency value of the signals extracted from digitized radiograms; both measurements depend on the bone mineral content and on the trabecular bone ...
Chimenti M +4 more
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Effect of trabecular curvature on the stiffness of trabecular bone
Journal of Biomechanics, 2005Simplified structural models of trabecular bone have been used to model various forms of trabecular variability. The structural effects of variability of direction, length and thickness of the trabeculae have been studied using 'lattice-type' finite element models.
Zev, Miller, Moshe B, Fuchs
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