Title :
A model to predict dispersion in cancellous bone
Author_Institution :
FDA Center for Devices & Radiol. Health, Rockville, MD, USA
Abstract :
In contrast to most biologic tissues, phase velocity in cancellous bone tends to decrease with frequency. A stratified model, consisting of alternating layers of bone and marrow (in vivo) or water (in vitro), has been employed to study this phenomenon. Phase velocity was measured from 300-700 kHz in phantoms consisting of regularly-spaced parallel polystyrene sheets in water, and 30 calcanea in vitro. For the phantoms, the agreement between theory and experiment was good. For the calcanea, the model performs well for predicting the frequency dependence of phase velocity
Keywords :
biomedical ultrasonics; bone; patient diagnosis; porosity; 300 to 700 kHz; calcanea; cancellous bone; dispersion; osteoporotic fracture risk; phase velocity; regularly-spaced parallel polystyrene sheets; stratified model; Biological system modeling; Biological tissues; Cancellous bone; Frequency; Imaging phantoms; In vitro; In vivo; Phase measurement; Predictive models; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.991938
