结果直接征象：“靶样征”7例，“脐凹征”2例，“环圈征、息肉样征”4例；
Results Direct signs:"target sign"(7 cases), "notch sign"(2 cases), "ring or halo sign"and "polypoid sign"(4 cases).
由于光的衍射作用，使通过聚焦系统的激光束入射到特定靶面成一光斑（主光斑） ，而在主光斑以外还有次级光斑圈（旁瓣）。
The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.
肠套叠的类型以回结型最多，油炸面圈征或靶环征是肠套叠的特征性超声表现；
The most popular type of intussusceptions is circle-linked. The ultrasound exam shows the characteristics of doughnut or target loop.
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