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In total hip arthroplasty, a placement of stem, which is one of the parts of the artificial hip joint, is even difficult for skilled operators. An optimum location of stem is different for each patient. No system for specifying the optimum location has been established. We pay attention to the method using ultrasound in consideration of portability and high introduction ratio to the medical field...
Total Hip Arthroplasty (THA) recently becomes more famous in Japan. The number of operations is increasing more and more because of longevity. In the operation, inserting artificial femoral joint is important for clinical outcome (e.g., pain, and loosening.). In addition, femoral stem which is one of the artificial joints, has a shape fitting to femur bone so that the fixation between the femur bone...
In total hip arthroplasty (THA), stem fixation is relating pain after surgery. While, there is no quantitative evaluation method of stem fixation. This study proposes an ultrasonic evaluation method of stem fixation in THA. We estimate the stem fixation based on attenuation of ultrasonic energy. Ultrasonic probe is placed on proximal end of the stem by custom maid jig. In the experiment, forces ranging...
Posterior cruciate ligament (PCL) is important for the knee stability. The problem seems to lie in the fact that it is difficult to segment the PCL from a magnetic resonance (MR) image. To reduce massive measurement time and subjective judgment error, this paper proposes a segmentation method of the PCL in knee joint from MR image and computed tomography (CT) image using anatomical information. In...
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