Abstract
The X-ray and magnetic resonance imaging methods has been difficult to grasp the small loosening between hip prosthesis stem and human femur. The sectional form in the front of the human femur is investigated using an ultrasonic pulse echo method. An ultrasonic wave is emitted toward the femur using a focused probe attached to the thigh surface. The echo waveform reflected from the outside of femur, and the inside of femur is measured. The sectional form in the front of the human femur by the ultrasonic wave is compared with that of the X-ray CT. Consequently, the sectional form in the front of the human femur can be obtained an accurately using the focused probe.
