Investigated the imaging characteristics of each layer, changes of echo, then examined the thickness of skin, subcutis, and diameter of cutaneous nerve in a ling axis view along cutaneous nerve ,finally to stored and printed the imaging.

• 观察皮肤各层及皮神经的声像图特征，回声变化，以皮神经走行的纵断面进行皮肤、皮下组织厚度和皮神经直径的测量。