Methods The study make use of echo intensity histograms to calculate the attenuation coefficient,samples were taken from different depth of the liver and 53 patients were enrolled.

• 方法运用超声直方图测量53名患者同一切面不同深度的肝组织回声的灰阶值,并计算出衰减系数,按超声常规检查是否有脂肪肝和血甘油三酯是否正常分组,对各组的衰减系数进行对照分析。