IVUS images ob-tained from the muscular and elastic arteries consisted of the inner high echoic, the medial low e-choic and the outer high echoic layers, histologically corresponded to the three layers of the arte-rial wall.

• 肌性和弹性动脉组织学上的内、中、外三层膜性结构与超声显示的内、外两层强回声带和中层回声暗区相一致.