目的 研究原发性气管肿瘤多层 螺旋CT(MSCT)的影像表现特点及诊断价 值。方法 选取我院19例经病理确诊的 原发性气管肿瘤患者为研究对象，以GE Light Speed QX/i MSCT扫描仪进行常规 平扫与增强扫描，数据传入AW工作站进行 分析，得到MPVE、VR、VB图像，经我院2 名影像学医师进行阅片，主要观察患者气 管肿瘤生长方向、形态及密度等影像学特 征，寻找与病理诊断结果的关系，从而评 价CT影像表现对原发性气管肿瘤的诊断价 值。结果 本次研究中19例患者均采取增 强扫描，结果显示恶性肿瘤及低度恶性肿 瘤增强CT值较低，分别为15-38hu、21- 44hu，良性肿瘤则明显增强，1例良性肿 瘤患者增强值为30Hu。CT检查中19例患 者，腔内宽基底结节型4例，均为低度恶 性肿瘤，3例均为唾液腺癌，1例气管粘液 表皮样癌；管壁生长浸润型1例，1例患者 为低度恶性腺样囊性癌；腔内窄基底结节 型1例，为良性肿瘤；腔内外肿块型共3 例，均属恶性肿瘤，1例鳞癌，1例腺癌， 1例为粘膜相关淋巴瘤；气管隆突肿瘤型 共10例，均属恶性腺癌及鳞癌。结论 多 层螺旋CT可通过观察原发性气管肿瘤的病 灶生长方向、密度、形状等特征实现原发 性气管肿瘤良、恶性鉴别，并可对恶性肿 瘤及低度恶性肿瘤进行判断。

Objective To study the imaging findings and diagnostic value of multi-slice spiral CT (MSCT) in primary tracheal tumors. Methods 19 cases of patients with primary tracheal tumors confirmed by pathology in our hospital were selected as the research objects. Routine plain scan and enhanced scan were performed by GE Light Speed QX/ i MSCT scanner and the data were analyzed by AW workstation to get MPVE, VR and VB images. The images were read by 2 imaging physicians in our hospital. The growth direction, shape, density and other pathological features of tracheal tumors were mainly observed to find out the relationship with pathological diagnostic results, so as to evaluate the value of CT imaging in the diagnosis of primary tracheal tumors. Results In this study, all of the 19 patients underwent enhanced scan. The results showed that the enhancement values of malignant tumor and low-grade malignant tumor were relatively lower, which were 15-38hu and 21-44hu, respectively. Benign tumor were significantly enhanced and the enhancement value of a patients with benign tumor were 30Hu. 19 patients were examined by CT and 4 cases of low-grade malignant tumors were intracavity wide basal node type, 3 cases were with salivary gland cancer and a case with tracheal mucous epidermoid carcinoma. There was 1 case of tube wall growth infiltrating type and 1 case with low-grade malignant adenoid cystic carcinoma; 1 case was benign tumor of intracavity narrow basal nodular type; There were a total of 3 cases of mass type in the inside and outside of the cavity and all belonged to malignant tumors, including 1 case of squamous cell carcinoma, 1 case of adenocarcinoma and 1 case of mucosa associated lymphoma; 10 cases of tracheal carinal tumor type belonged to malignant adenocarcinoma and squamous cell carcinoma. Conclusion CT can be used to identify the benign and malignant primary tracheal tumors by observing the growth direction, density and shape of the primary tracheal tumors. It can be used to identify malignant and low-grade malignant tumors.