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目的:探讨单排和多排螺旋CT低剂量扫描在成人肺结核复查随访中的应用价值。方法:收集我院2015年1月—2017年6月初次检查后治疗3、6或9个月复查,随机抽取单排和16排螺旋CT组各500例继发性肺结核患者,单排螺旋CT组采用的是110kv,36mAS,16排螺旋CT组采用的是110KV,11-20MAS,层厚5mm,层间距5mm,扫描视野(C-FOV)固定为L,显示视野(D-FOV)视个体而定扫描其它扫描参数不变。扫描范围从肺尖到肺底。常规行吸气和屏气训练后仰卧位扫描。结果:使用单排、16排CT患者接受的剂量有显著统计学差异。使用低剂量扫描,单排降低了61.3%,16排降低了67.5%,患者接受的容积CT剂量指数明显低于常规扫描;图像质量优率单排组为95.4%,16排组为97.6%,扫描图像质量无明显统计学差异。结论:对诊断报告无显著性影响时,低剂量CT扫描显著降低辐射剂量,低剂量CT扫描可作为肺结核复检的常规扫描方法,减少患者所受X射线的危害,值得临床广泛推广。
Objective: To investigate the value of single-slice and multi-slice spiral CT low-dose scanning in the follow-up of adult pulmonary tuberculosis. Methods: The patients were followed up for 3, 6 or 9 months after the initial examination in our hospital from January 2015 to June 2017. We randomly selected 500 patients with secondary pulmonary tuberculosis from single-row and 16-row spiral CT patients, Group used 110kv, 36mAS, 16-slice spiral CT group is 110KV, 11-20MAS, layer thickness 5mm, spacing 5mm, scanning field of view (C-FOV) fixed at L, showing field of vision (D-FOV) And scan the other scan parameters unchanged. Scanning range from the apex to the bottom of the lungs. Conventional breathing and breath holding training supine position scan. RESULTS: There was a statistically significant difference in the doses received for patients in a single row, 16-row CT. With low-dose scanning, the single-row scan was reduced by 61.3% and the 16-row scan by 67.5%, and the volume CT dose index was significantly lower than that of conventional scan. The image quality was 95.4% Scanning image quality no significant statistical difference. Conclusion: There is no significant effect on the diagnostic report, low-dose CT scan significantly reduce the radiation dose, low-dose CT scan can be used as a routine scan of tuberculosis, reduce the risk of X-rays in patients with deserved widespread clinical promotion.