摘要
目的通过对低剂量螺旋CT在肺部扫描检查中放射剂量的分析,来体现低剂量螺旋CT在肺癌早期普查中的价值。方法对30例已经确诊为各种肺部肿瘤的患者进行多层螺旋CT扫描,即分别用低剂量(40mAs、30mAs、20mAs)和常规剂量(195mAs)对这30例患者进行扫描,并且对扫描结果进行比较。比较的内容包括肺内小的转移灶、图像的扫描质量、纵膈内的小淋巴结的检出率。结果经过低剂量与常规剂量的扫描对比,发现低剂量扫描对病人的辐射影响低,而且最适合的扫描剂量为30mAs。扫描检查肺内的小病灶和扫描检查出结节的数目、大小及部位的分布均一样。结论低剂量螺旋CT在肺部的扫描检查与常规剂量扫描的结果几乎一致,在保证扫描质量的同时,降低了对患者的辐射,值得应用及推广。
Objective The low dose of spiral CT scan in the lungs in the analysis of tile radiation dose, to reflect low doses spiral CT in lung cancer early census of the value. Methods 30 patients for all kinds of lung cancer has been diagnosed patients in multis[ice CT scan, with low dose respectively （30 mAs） regular doses （195 mAs） to the 3（1 patients scanned, and compared the results to scan. Is the content of the lungs small metastases, image scanning quality and mediastinum within the small lymph node detection rate. Re- suits after a low dose and regular doses of scanning contrast, scan in the noise there are differences （the chi-square =28.69, P 〈 0.05）, in the spatial resolution no difference （the chi- square = 0, P〉 0.05）. And in the lungs, small lesions and a scan of the number of the nodes, size. and parts of the distribution are the same. Conclusion low-dose spiral CT scan in the lung and regular doses scan results almost unanimously, ensure scanning the quality at the same time, reduce the patient of radiation, it is worth of application and promotion.
出处
《中国CT和MRI杂志》
2012年第6期47-48,共2页
Chinese Journal of CT and MRI
