EXPLORING CORTICAL BONE DENSITY THROUGH THE ULTRASOUND INTEGRATED REFLECTION COEFFICIENT
نویسندگان
چکیده
منابع مشابه
Determination of Relationships between the Ultrasound Velocity and the Physical Properties of Bovine Cortical Bone Femur
Accurate measurements of physical characteristics of bone are essential for diagnosis, assessment of change following treatment, and therefore, indirectly, for evaluation of new forms of therapy. This is particularly true of osteoporosis and aging skeleton, in which fractures occur easily. Methods: In this study an ultrasonic system was set-up and calibrated on Plexiglas tubes of variable thick...
متن کاملdetermination of relationships between the ultrasound velocity and the physical properties of bovine cortical bone femur
accurate measurements of physical characteristics of bone are essential for diagnosis, assessment of change following treatment, and therefore, indirectly, for evaluation of new forms of therapy. this is particularly true of osteoporosis and aging skeleton, in which fractures occur easily. methods: in this study an ultrasonic system was set-up and calibrated on plexiglas tubes of variable thick...
متن کاملInfluence of cortical bone thickness on the ultrasound velocity
OBJECTIVE An experimental in vitro study was carried out to evaluate the influence of cortical bone thickness on ultrasound propagation velocity. METHODS Sixty bone plates were used, made from bovine femurs, with thickness ranging from 1 to 6 mm (10 of each). The ultrasound velocity measurements were performed using a device specially designed for this purpose, in an underwater acoustic tank ...
متن کاملAdiabatic Asymptotics of the Reflection Coefficient
The properties of the functions f and M are well known (see, e.g., [1]). The function R = −MM , defined for k ∈ R, |R| = 1, is called the reflection coefficient. If v(x) = p( x), where > 0 is a small parameter, then all these objects become functions of , and we may ask about the asymptotic behavior as → 0 of, say, the solution f , via which M , R, and ψ can be expressed. Such asymptotics is sa...
متن کاملQuantifying the osteocyte lacunae density in human cortical bone
Osteocytes are the basic bone cells and are located in lacunae inside the bone matrix. Each osteocyte is connected to its neighbours through tiny channels (canaliculi) with a diameter of less than a micrometer. This osteocyte network plays an important role in mechanically induced adaptive bone remodeling, whereby the individual osteocytes work as mechano-sensors to detect states of local under...
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ژورنال
عنوان ژورنال: Acta Ortopédica Brasileira
سال: 2018
ISSN: 1809-4406,1413-7852
DOI: 10.1590/1413-785220182604177202