Evaluation of Low-dose and Target Spiral CT Scanning Technique in the Diagnosis of Pulmonary Nodules

Objective To evaluate low dose and target spiral CT scanning technique in the diagnosis of pulmonary nodules.Materials and Methods Low dose and local target spiral CT scanning was performed in 46 patients with pulmonary nodules (≤3cm) detected on conventional multislice spiral CT scans. The number, shape and calcification of the nodules, the air bronchogram, interface sign and the changes of the neighboring structures were analyzed and qualitative diagnosis was made. Results In low dose scanning, the displaying rate of nodule sign was lower than that in conventional scanning. No significant difference in the demonstration of nodule number, calcification, spiculate sign, air bronchogram, interface sign and pleural involvement existed between low dose and conventional dose groups. Target spiral scanning was superior to other two techniques in showing nodule sign.Conclusion Low dose with target spiral CT scanning technique should be considered as the best choice for pulmonary nodules.