低剂量CT与常规剂量CT对早期肺癌的诊断效果对比
2019-06-10刘伟文惠俊国
刘伟文 惠俊国
[摘要] 目的 研究在早期肺癌诊断中采取低剂量CT与常规剂量CT对效果的影响。 方法 本次采取双盲法将本院从2017年4月~2018年4月期间收治的60早期肺癌患者分为两组,每组30例,对照组行常规剂量CT检查,实验组行低剂量CT检查,对比两组诊断价值。 结果 对照组早期肺癌患者诊断准确率(93.33%)低于实验组的96.67%,但差异无统计学意义(P>0.05)。实验组早期肺癌患者最大有效辐射剂量为(0.68±0.12)mSV、权重CT劑量为(1.78±0.33)mGy、满意度评分为(94.22±5.33)分,与对照组比较,差异有统计学意义(P<0.05);但实验组早期肺癌患者图像质量为(3.55±0.58)分,与对照组的(3.60±0.88)分比较,差异无统计学意义(P>0.05)。 结论 将低剂量CT与常规剂量CT扫描应用于早期肺癌诊断中均存在一定效果,但低剂量CT诊断价值更显著。
[关键词] 低剂量CT;常规剂量CT;早期肺癌;图像质量;诊断价值
[中图分类号] R730.44;R734.2 [文献标识码] B [文章编号] 1673-9701(2019)09-0102-03
[Abstract] Objective To study the effect of low-dose CT and conventional dose CT on the diagnosis of early lung cancer. Methods A total of 60 patients with early stage lung cancer admitted from April 2017 to April 2018 were divided into two groups double-blindly, 30 cases in each group. The control group was given routine dose CT examination and the experimental group was given low-dose CT examination. The diagnostic value of the two groups was compared. Results The diagnostic accuracy of the control group (93.33%) was lower than that of the experimental group (96.67%), but the difference was not statistically significant (P>0.05). The maximum effective radiation dose was (0.68±0.12) mSV, weight CT dose was (1.78±0.33) mGy, satisfaction score was (94.22±5.33) scores in the experimental group, which were significantly different from those in the control group(P<0.05). There was no significant difference in the image quality between the experimental group (3.55±0.58) scores and the control group (3.60±0.88) scores (P>0.05). Conclusion Low-dose CT and conventional dose CT scan have certain effects in the early diagnosis of lung cancer, but the diagnostic value of low-dose CT is more significant.
[Key words] Low-dose CT; Conventional dose CT; Early lung cancer; Image quality; Diagnostic value
研究显示[1],在男性癌症人群中,无论是发达国家还是欠发达国家,肺癌均是癌症死亡的最主要原因;在女性癌症人群中,肺癌已经超越乳腺癌成为发达国家的首要死亡原因。可见,肺癌是当前对人类威胁最大的恶性肿瘤,早期发现诊断、早期治疗是降低肺癌病死率、提高肺癌患者长期生存率的唯一途径。本次数据统计对象是2017年4月~2018年4月期间收治的60例早期肺癌患者,报道低剂量CT与常规剂量CT扫描的价值,现报道如下。
1 资料与方法
1.1 一般资料
本次对象为2017年4月~2018年4月期间我院收治的60例早期肺癌患者。纳入标准:(1)经病理学确诊为早期肺癌[2];(2)行CT诊断;(3)签署知情同意书。排除标准[3]:(1)精神疾病患者;(2)其他恶性肿瘤患者;(3)心脑血管疾病患者;(4)肝肾功能障碍患者。采取双盲法对样本分组,对照组30例,男女比为14∶16,年龄40~70岁,中位年龄(58.23±3.21)岁;实验组30例,男女比为16∶14,年龄41~71岁,中位年龄(58.98±4.32)岁。两组性别、年龄等基础资料比较,差异无统计学意义(P>0.05),具有可比性。
1.2 方法
两组患者入院之后均开展CT检查,扫描过程中患者需要一次吸气后屏住呼吸直至完成扫描。应用日本东芝研发的Aquilion 64层螺旋CT进行检查,需要指导患者开展正确的呼吸训练,选取美国64层螺旋CT750扫描机进行检查,将肺尖至肺底的全肺作为扫描范围,以纵隔窗和肺窗开展扫描。实验组予以低剂量扫描,扫描参数:扫描电压120 kV,扫描电流25 mA,扫描层厚7.5 mm,重建图像层厚2.5 mm,间隔2.5 mm。对照组予以常规剂量扫描,扫描参数:扫描电压120 kV,扫描电流200 mA,扫描层厚5.0 mm,重建图像层厚3.0 mm,间隔3.0mm,扫描时间0.5 s/r,10~12 s即为一次完整扫描时间。依据扫描定位情况对肺窗、纵隔窗图像的窗位以及窗宽实施自动调整,完成扫描完后把图像输送到系统工作站中后期处理图像,且选取存在2名丰富经验的放射科医生进行独立阅片。