结论：腹腔游离气体，腹腔游离积液、大网膜及肠系膜改变是腹腔中空脏器穿孔的主要CT表现。
Conclusion: the main CT signs of the hollow viscera perforation of the abdomen include free gas, free effusion and changes of the greater omentum and mesentery.
结果所有患者均有不同程度的腹痛和腹膜刺激征，腹穿阳性率为75%，X线检查提示膈下游离气体阳性率62.5%，CT检查提示腹腔积液阳性率75%。
Abdominal puncture positive rate was 75%. X-ray examination showed the positive rate of subdiaphragmatic free air which was 62.5%. CT scan showed hydrops abdominis positive rate was 75%.
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