低剂量和靶螺旋CT扫描技术在肺结节诊断中的价值

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

目的 评价低剂量和靶螺旋CT扫描技术在肺结节诊断中的价值。资料与方法 对 4 6例经肺部常规多层螺旋CT扫描发现肺结节 (≤ 3cm)的患者同时行肺部低剂量和局部靶螺旋CT扫描 ,所得图像分别就肺内发现结节 (≤ 3cm)的数量及形态 ,结节内钙化 ,支气管征、界面征及邻近改变等进行逐一判定 ,并分别做出定性诊断。结果 在上述不同的肺部CT扫描技术中 ,低剂量扫描时 ,除病灶结节征的显示率较常规剂量低外 ,发现结节的数量和其他征象如 :钙化、毛刺征、支气管征、界面征及邻近胸膜改变等的显示 ,低剂量与常规剂量扫描间均无显著性差异。而靶扫描技术对结节征的显示明显优于上述 2种扫描技术。

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.