电子束CT 双期增强扫描对肺内孤立性肿块的诊断价值

目的 研究电子束ＣＴ在肺内单发性肝块诊断中的价值。方法 对手术和／或病理证实的３２例周围型肺癌与１８例良性病变分别进行电子束ＣＴ平扫及双期增加扫描。结果 周围型肺癌主要表现为肿块分叶、边缘毛刺、胸膜凹陷及空泡征；良笥病变多为无分叶、边缘光滑锐利肿块。但部分良、恶性病变ＣＴ征象重叠，仅凭形态学表现难以鉴别。平扫周围型肺癌平均ＣＴ值４５ＨＵ，良性病变平均ＣＴ值５１ＨＵ，无明显差别。增强后周围型肺癌明显强化，ＣＴ值平均增加３１ＨＵ；良性病变轻度强化，ＣＴ值平均增加８ＨＵ。结论 电子束ＣＴ在肺内孤立性肿块的诊断中具有重要价值。

Evaluation of EBCT Double-Phase Enhancement Examination in Diagnosis of Solitary Pulmonary Mass

Purpose to evaluate the value of EBCT in diagnosis of solitary pulmonary nodule. Methods Plain and double|phase enhancement EBCT scanning were performed in 32 cases of peripheral lung carcinoma and 18 cases of benign nodules all being confirmed by surgery and/or pathology. Results Peripheral lung carcinoma mainly showed a mass with lobulated shape,spicules of margin,pleural indentation and vacuole sign. Most of benign nodules was absent of lobulation and with smooth margin. But some of benign and malignant nodules were similar in morphology characteristics, differentiating diagnosis was difficult in such cases. In plain scan,the average CT value of malignant nodules was 45HU,and the benign nodules was 51HU. After injection of contrast material,the average enhancement of malignant nodules was 31HU,compared with an average enhancement of 8HU for the benign nodules. Conclusion EBCT has an important value in the diagnosis of solitary pulmonary masses. [