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Osteoporotic bones are likely to have less cortical bone than healthy bones. The velocities of guided waves propagating in a long cylindrical bone are very sensitive to bone properties and cortical thickness (CTh). This work studies the dispersion and attenuation of ultrasonic guided waves propagating in long cylindrical bone. A hollow cylinder filled with a viscous liquid was used to model the long...
Bone-conducted ultrasound (BCU) has been used to develop a bone-conducted ultrasonic hearing aid (BCUHA) since it was reported that normal-hearing humans as well as some profoundly deaf people can perceive ultrasound through bone conduction (BC). In order to make a comparison between BCUHA and the conventional bone-conducted hearing aid (BCHA), finite difference time domain (FDTD) method is used to...
Congenital heart defect is a leading cause of children mortality. Two-dimensional echocardiography is a safe and noninvasive diagnostic tool and two-dimensional images can be reconstructed to a three-dimensional model. However, for some complex congenital heart diseases, the visualization of three-dimensional cardiac tissue structure alone is not enough. Visualization of blood flow patterns in a human...
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