局灶性机化性肺炎的CT表现及特征

目的：探讨局灶性机化性肺炎的CT特点及诊断价值。方法：回顾性分析45例经手术病理证实的局灶性机化性肺炎的临床资料及CT表现。结果：45例按病灶形态分为结节型（16例）、肿块型（15例）、浸润型（8例）和实变型（6例）。CT表现：7例边缘清晰光整，10例呈锯齿样改变，12例见有细毛刺，8例边缘模糊，8例边缘呈不规则样。10例结节型和10例肿块型病灶行平扫加增强。结节型：病灶均匀强化3例，环状强化3例，不规则强化2例，不增强2例；肿块型：病灶均匀强化4例，环状强化3例，不规则强化2例，不增强1例。6例环状强化病灶内有液化坏死。16例病灶内见支气管充气征，12例见支气管血管束异常，20例病灶位于胸膜旁。结论：局灶性机化性肺炎CT表现多样，但有一定的特征性，CT诊断符合率较高。

CT Appearances and Characteristic Features of Focal Organizing Pneumonia

Objective:To investigate CT features and value of diagnosis of focal organizing pneumonia (FOP). Methods:CT scans and clinical recording of 45 patients with histologically proved focal organizing pneumonia were studied retrospectively.Results:45 cases could be classified into types of nodule (16 cases),mass (15 cases),infiltration (8 cases),consolidation (6 cases).7 cases had a smooth margin,10 cases had a serrated margin,12 cases had thin spicules,8 cases had a hazy border,8 cases had a irregular margin.10 cases of nodule and mass leisons underwent nonenhancement and enhancement CT scan.3 of 10 nodle lesions had a homogeneous enhancement,3 had a circular enhancement,2 had a inhomogeneous enhancement,2 had a nonenhancement.4 of 10 mass lesions had a homogeneous enhancement,3 had a circular enhancement,2 had a inhomogeneous enhancement.Necrosis were seen in 6 circular enhancement cases.10 cases had an air bronchogram.12 cases had an abnormal bronchovascular bundle.20 cases located in peripheral lung parenchyma.Conclusion:The CT manifestations of focal organizing pneumonia is varied,but has some specific radiographic features which can make a correct diagnosis.