A Study On Applying Dynamic Enhanced MSCT To The Lung Nodules

Objectives1. To explore the scan methods and technology of applying the dynamic enhanced scanning by multi-slice spiral computed tomography (MSCT) to the lung nodules.2. We comprehensively analyze the change of tissue density from the early phase to the delayed phase of dynamic enhanced CT, and assess the blood flow pattern of pulmonary nodules quantitatively. In addition, we also discuss its clinical value in distinguishing benign from malignant pulmonary nodules.Materials and Methods:1. A total of 69 patients with pulmonary nodule have undergone dynamic chest CT. These CT examinations were performed by using a 16-detector row (LightSpeed; GE Medical Systems) scanner. Series of images were obtained throughout the nodule, with 5mm slice thick /4 slices. The total of contrast medium was computed by 1.5ml per kilogram body weight and was administered at the injection rate of 4ml per second. Meanwhile, we split the scan process into tow phases. First, a serial of 4 images were obtained throughout the nodule from 6s to 48s, with an interval of 2 s; then, an additional nine series of images were obtained from 60s to 180s , with an interval of 20s.