The Value Of High Resolution CT And Enhanced Spiral CT In The Diagnosis Of Solitary Pulmonary Nodule

PurposeTo evaluate the diagnostic value of high resolution and enhanced spiral CT in small pulmonary solitarynodules (SPNs) .Materials and MethodsThe plain,spiral and contrast enhanced CT date of 48 patients with SPNs less than 3cmindiameter confirmed by pathology were retrospectively studied,among which 28 cases presented with peripheral lung cancers,with metastatic tumor,5 with inflammatory masses of the lung ,4 with nodultuberculomas,2 with hamartoma,2 with hemangiomaand.ResultsThe accuraterate of high resolutionen enhanced spiral CT for diagnosis o28-isofucosterolSPNs was 90%.The mean value of enhanced CT with malignant SPNs and benign ones were 36 Hu and 9Hu respectively.Most malignant SPNs showed homogeneous enhancement,The enhanced CT value was more than 20Hu.The benign ones were heterogeneous enhancement,The enhanced CT value was less than 10Hu.ConclusionHigh resolution enhanced spiral CT examination makes it possible to distinguish malignant SPNs from benign ones in most situations.In the same time,we emphasize that the features of imaging morphology of SPNs,have important value in differentiating malignant SPNs from benign ones.