影像诊断对自发性急性弥漫性腹膜炎（通过腹膜自身表现：增厚、模糊、渗出）起到提示诊断的作用；对继发性急性弥漫性腹膜炎除了可以发现腹膜本身病变外，还可明确原发病灶及病变累及范围，对临床治疗方案制定、手术与否、预后评估等都有重要价值。CT较X线平片检查更细致、全面，通过优先部位的显示，容易检出病变，定位更加准确和具体。

Value of modern imaging technology in the diaghosis of acute diffuse peritonitis LI Ming-hua，ZHAO Jun-gong. Department of Radiology, the Sixth People’s Hospital of Shanghai Jiao Tong University, Shanghai 200233，China Corresponding author：LI Ming-hua，E-mail：liminghua@online.sh.cn Abstract The imaging diagnosis of spontaneous acute diffuse peritonitis (including peritoneal thickness, fuzzy, effusion) plays the role of prompt diagnosis. Peritoneal changes as well as direct findings of original lesions obtained on contrast enhanced CT are manifestations for the diagnosis of secondary acute diffuse peritonitis, which are important to decide the treatment protocol. CT is a more valuable method than the X-ray film in the diagnosis of acute diffuse peritonitis.