急性阑尾炎MSCT平扫表现及诊断

目的:探讨急性阑尾炎的MSCT平扫表现,评价MSCT平扫在急性阑尾炎术前诊断价值.方法:107例手术病理证实的急性阑尾炎患者纳入研究,年龄15～94岁,平均46.6岁,男性66例,女性41例,使用GE公司Lightspeed Plus 16层多排螺旋CT完成1.25mm层厚的薄层扫描并进行重建观察,2位有经验的放射科医生共同回顾性分析,并与术前诊断进行比较.结果:急性阑尾炎CT征象包括阑尾增粗(100,93.46%,直径6～22mm)、阑尾粪石(40,37.38%)、阑尾腔积气(15,15.89%)、阑尾周围条纹影(59,71.03%)、回盲部周围淋巴结增大(63,58.88%)、右下腹肠管反射性扩张(49,45.74%)等.单纯性阑尾炎19例,术前诊断准确率68.42%(13/19),CT上阑尾平均直径(8.6±2.3)mm,周围多无渗出(17/19);化脓性阑尾炎63例,术前诊断准确率63.49%(40/63),阑尾直径(12.9±3.9)mm,周围均有明显渗出;坏疽性阑尾炎21例,术前诊断准确率80.95%(40/63),阑尾粗细不均,平均直径(19.2±8.0)mm,周围渗出显著,阑尾腔及周围积气、粪石多见;三者阑尾的直径有明显差异(P<0.01);阑尾周围脓肿4例,均有明显液性区域,均正确诊断.阑尾积气及粪石在4型中有显著性差异(P<0.01),单纯性阑尾炎周围渗出明显少于其他3型(P<0.01).结论:急性阑尾炎有很高的MSCT平扫诊断准确性,并可以较好地进行术前分型及病情评估,对临床治疗具有一定的指导意义.

Diagnosis of Acute Appendicitis with MSCT Plain Scan

Purpose:To investigate the features of acute appendicitis on MSCT plain scan and evaluate the value of the preoperative diagnosis by MSCT.Methods:One hundred and seven cases of pathologically proven acute appendicitis were included in the study,aged 15 to 94 years,median 46.6 years,male 66 cases,female 41 cases.GE Lightspeed Plus 16 multi-slice spiral CT was used for scanning with slice thickness 1.25mm and reconstruction.Two experienced radiologists retrospectively analyzed together and compared the result...