目的探讨急性阑尾炎的多层螺 旋CT(MSCT)影像学特征及其在急性阑尾炎 中诊断价值。方法 将经手术病理证实的 56例急性阑尾炎患者纳入本研究，所有患 者术前常规行全腹部MSCT检查，总结急性 阑尾炎的MSCT影像学特征。结果 本组56 例确诊的患者中，23例有阑尾周围的炎性 浸润，33例无阑尾周围的炎性浸润，其中 伴有脓肿形成6例。回盲前位、回盲后位 和盲肠后位均为4例，盲肠下位21例，回 肠下位23例。80.4％的患者MSCT能够清楚 显示阑尾，主要表现为：阑尾肿大，阑尾 直径12.1±4.6mm(6.1-21.6mm)，其中9例 可见阑尾腔内结石，粪石远端表现为阑尾 积液并扩张。11例患者的阑尾MSCT图像 不能清晰显示，仅发现阑尾周围有炎性肿 块。阑尾穿孔发生率为8.9％，MSCT图像 表现为粪石离开阑尾腔进入腹腔和增粗的 阑尾周围可见少量积气。结论 MSCT可以 清楚显示阑尾，对于急性阑尾炎具有特征 性的表现，可以作为急性阑尾炎术前常规 检查。

Objective To summarize the imaging characteristics and value of multislice CT (MSCT) in the diagnosis of acute appendicitis. Methods 56 patients with acute appendicitis confirmed by surgery and pathology were selected in this study, all patients underwent preoperative conventional whole abdominal MSCT, and MSCT imaging characteristics of acute appendicitis werer summarized. Results Of all the 56 patients, 23 cases showed periappendiceal inflammatory infiltration, and 33 cases showed no inflammatory infiltration and 6 cases showed abscess. The appendix of 4 cases located before and behind of ileocecum and behind of cecum respectively, 21 cases down of cecum and 23 cases down of ileum. MSCT can clearly show the appendix in 80.4% of the patients, and the mainly manifestation was swollen, and the average diameter was 12.1±4.6mm (6.1-21.6mm). Appendiceal stones were found in 9 cases which showed appendix expansion and effusion. The appendix can't clearly show in 11 patients by MSCT. 8.9% of the patients showed appendiceal perforation. The stones were replaced from the appendix to the abdominal cavity in the MSCT images, and periappendiceal gas could be seen. Conclusion MSCT can show appendix clearly. Acute appendicitis has special characteristics on MSCT, and it can be used as a routine preoperative examination for acute appendicitis.