音速値による筋硬度評価に関する基礎的研究

概要

論文の詳細を見る
The velocity of sound in tissue in ultrasound diagnosis depends on the stiffness of the tissue. Several studies have used this principle to confirm that the sound velocity in liver and coracoacromial ligament differs between normal and abnormal tissues. However, there have been few reports on the application of this method to sports medicine. We carried out basic measurements on the difference in sound velocity in muscles, tendon, and bone, using ultrasound diagnostic equipment having a sound velocity correction function. In muscle tissues, we measured the sound velocity with the probe placed parallel (0 degrees), at an angle (45 degrees), and perpendicular (90 degrees) to the muscle fiber orientation. As a result, the sound velocity of each tissue was 1641.5 ± 10.4 m/s in the tibial bone, 1622.9 ± 13.5 m/s in the Achilles tendon, 1590.5 ± 12.5 m/s in the medial head of gastrocnemius muscle, and 1584.8 ± 9.7 m/s in the soleus muscle. These results suggest that the sound velocity depends on the angle of the probe relative to the muscle fiber orientation, and that the stiffness of individual muscles can be quantified from the sound velocity.
2013-02-20