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目的:探讨低剂量螺旋CT在肺结核诊断中的应用价值。材料与方法:采用东芝公司Active 16排螺旋CT对98例胸部DR平片怀疑肺结核的患者进行常规剂量螺旋CT扫描,同时对病变部位行低剂量螺旋CT扫描。所得图像由3名从事影像诊断工作主治医师以上的医生进行判读,分别就肺结核在螺旋CT上的主要征象进行逐一判定,最后做出定性诊断。结果:98例胸部DR平片怀疑肺结核患者,最后通过查痰、活检或肺结核菌阴性确诊的肺结核患者有80例。对以上确诊的80例肺结核患者的两种扫描方式所得图像进行判定,低剂量螺旋CT与常规CT在肺结核征象的检出率差异无统计学意义(P>0.05)。结论:低剂量螺旋CT大幅度降低患者的辐射剂量,能获得常规剂量CT扫描相同的诊断效果,在肺结核的诊断中具有临床应用价值。
Objective: To investigate the value of low-dose spiral CT in the diagnosis of pulmonary tuberculosis. Materials and Methods: Ninety-four patients with suspicious pulmonary tuberculosis undergoing plain radiographs of chest were routinely scanned by using the active 16-slice spiral CT of Toshiba Corporation, and low-dose spiral CT was performed on the lesion. The images obtained were interpreted by three doctors who were above the chief physician of imaging diagnosis. The main signs of tuberculosis on spiral CT were judged one by one. Finally, a qualitative diagnosis was made. Results: There were 80 cases of pulmonary tuberculosis confirmed by TB sputum, biopsy or pulmonary tuberculosis in 98 cases of suspected chest tuberculosis. There was no significant difference in the detection rate of pulmonary tuberculosis sign between low-dose spiral CT and conventional CT (P> 0.05). Conclusion: Low-dose spiral CT can significantly reduce the radiation dose of patients and achieve the same diagnostic effect as conventional dose CT scan, which has clinical value in the diagnosis of pulmonary tuberculosis.