Results:The free gas in variable location,shape and size was seen in 24 cases,and the leakage of contrast medium in 3 cases,as well as the encapsulation in omental bursa in 2 cases.

• 结果：24例发现腹腔内位置、形态、大小不同的游离气体影，3例伴有造影剂外漏现象，2例仅见网膜囊内包裹征象。