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目的:探讨低剂量螺旋CT对孤立性肺结节良恶性病变的鉴别诊断价值。方法:对常规剂量(255mA)螺旋CT发现有孤立性肺结节的42例患者,再行一次低剂量(70mA)螺旋CT扫描,比较两种剂量螺旋CT扫描孤立性肺结节在形态学特征、定性诊断方面是否有差异。结果:低剂量组在孤立性肺结节的形态学特征、定性诊断方面与常规剂量组比较,差异无统计学意义(P>0.05)。结论:低剂量螺旋CT扫描和常规剂量螺旋CT扫描对孤立性肺结节良恶性病变的鉴别诊断无差异,而低剂量螺旋CT扫描具有明显减少X射线辐射量的优势,对于青少年、孕妇、免疫力低下患者等X射线敏感人群更有其特殊的意义。
Objective: To investigate the differential diagnosis of benign and malignant solitary pulmonary nodules with low-dose spiral CT. Methods: Forty-two patients with solitary pulmonary nodules found by routine dose (255mA) spiral CT were treated with a low-dose (70mA) spiral CT scan. The morphological characteristics of solitary pulmonary nodules , Whether there is a difference in qualitative diagnosis. Results: There was no significant difference in the morphological characteristics and qualitative diagnosis of solitary pulmonary nodules between the low dose group and the conventional dose group (P> 0.05). Conclusion: Low-dose spiral CT scan and conventional dose spiral CT scan have no difference in the differential diagnosis of benign and malignant solitary pulmonary nodules, while low-dose spiral CT scan has the advantage of significantly reducing the amount of X-ray radiation. For adolescents and pregnant women, X-ray sensitive patients such as patients with low force have their special significance.