Studies in Muscle Mass in the Lower Limbs of the Elderly using a Portable Ultrasound Evaluation System

下肢肌力对老年人日常生活活动能力的维持至关重要。然而，肌肉力量测试对老年人来说可能是有风险的，因为它需要最大的肌肉张力，给肌肉和关节带来很大的压力。因此，我们专注于大腿的肌肉面积，这与肌肉力量有很强的关系，并开发了一种新的测量系统，在大腿肌肉横截面积超声系统。此外，我们推导出一个标准值，用于评估大腿的肌肉面积，考虑性别，年龄和身体大小，并检查大腿的肌肉面积之间的关系和日常生活能力的中年和老年人的主题。

The muscle strength in the lower limbs is very important for the elderly to maintain their capacity of activities of daily living (ADL). However, it is possible that muscle strength tests are risky for the Elderly, because it requires maximal muscle tension and gives great stress to the muscles and the joints. Therefore, we focused on the muscle area of the thigh, which has a strong relationship to muscle strength, and developed a new measuring system for the muscle cross sectional area in the thigh using ultrasound system. In addition, we derived at a standard value for evaluating the muscle area of the thigh, considering sex, age and body size, and examined relationship between the muscle area of the thigh and ADL abilities in middle-aged and elderly subjects.