摘要
目的探讨单排螺旋CT行肺低剂量扫描的技术可行性及其应用价值。方法从132例行肺低剂量扫描的受检者中,选择13例作为单排螺旋肺低剂量扫描(50mAs)与常规剂量扫描(170mAs)的对照对象(7例已确诊肺外恶性肿瘤肺内有多发转移结节,3例有肺内孤立结节,3例有肺内类结节斑点状病灶),对比两种扫描诊断效果,从肺内结节的数量及其细节征象和肺各叶段支气管的检出几方面比较。分析单排螺旋CT肺低剂量扫描参数及其总计毫安秒量,评价该扫描技术的可行性和安全性。结果两种扫描对肺内结节数量,大小的检出均相同,对肺内结节细节征象和肺各叶段支气管的检出无显著性差异(χ2=0.123～3.39,P>0.05)。低剂量扫描毫安秒量约为常规剂量的29%。结论单排螺旋CT肺低剂量扫描,是一种安全、有效、可行的筛查早期肺内结节病变的检查方法。
Objective To investigate the feasibility of low-dose single-slice helical CT in pulmonary CT scan and evaluate the clinical application. Methods Thirteen cases were selected out of 132 cases, in which low-dose （50mAs） single-slice helical CT scan of chest was performed. This set of cases included 7 cases of multiple metastatic nodules; 3 of solitary pulmonary nodule; and 3 of pulmonary patchy lesions. Regular dose（170mAs） CT scan was also performed on all those patients. The regular dose and low dose CT scan were compared on sensitivity of detecting the lesions; the performance in demonstrating the details of the abnormalities; and the capability of revealing the segmental bronchi as well. Results The same number and size of the pulmonary nodules were revealed with scan modalities loaded with different doses. No significant difference in demonstrating the details of the nodules and the segmental bronchi was found between both modalities （χ^2 =0. 123-3.39, P 〉 0. 05） . The X-ray radiation dose of the X-dose single-slice helical CT scan is 29% of the conventional scan. Conclusion The low-dose single-slice helical CT scan is a safe, effective and feasible method for screening early stage pulmonary nodules.
出处
《影像诊断与介入放射学》
2006年第2期51-54,共4页
Diagnostic Imaging & Interventional Radiology
关键词
低剂量
单排螺旋CT
肺结节
Low-dose
Single-slice helical CT
Pulmonary nodules
