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目的：评估CT增强效应对肺部SPN的诊断与鉴别诊断的价值。方法：73例经手术病理证实的SPN，所有SPN的直径均＜3cm。采用GE－SYTEC2000型CT扫描机，在常现平扫发现病灶后，局部作薄层（2～5mm）扫描。增强扫描先采用动态，测注射造影剂后30，60，120及180s的病灶的CT值。造影剂为非离子型，剂量为100ml，自动高压注射器注射，速度为2ml／s。结果：73例中47例为原发性肺癌，增强CT值多在20～50HU之间且多为不均质性强化，至于良性病变则多无强化或轻度不均质强化，而结核瘤则可表现为周边强化（5例中有2例）。结论：采用CT强化效应作为肺部良恶性SPN的诊断及鉴别诊断，具有相当大的价值。
Objective: To assess the value of CT enhancement in the diagnosis and differential diagnosis of pulmonary SPN. Methods: Seventy-three SPNs confirmed by pathology were all <3 cm in diameter. The use of GE-SYTEC2000 CT scanner, found in the usual flat lesions, the local thin layer (2 ~ 5mm) scan. Enhanced scanning first dynamic, measured after injection of contrast agent 30,60,120 and 180s CT value of the lesion. Contrast agent for the non-ionic dose of 100ml, automatic high-pressure syringe injection, the speed of 2ml / s. Results: Among the 73 cases, 47 cases were primary lung cancer with enhanced CT values mostly ranging from 20 to 50 HU with mostly inhomogeneous enhancement, while benign lesions were mostly non-enhanced or mildly inhomogeneous, while tuberculoma Can be expressed as peripheral enhancement (2 in 5 cases). Conclusion: It is of great value to use CT enhancement as a diagnostic and differential diagnosis of benign and malignant SPN in lung.