在肺癌查队伍中,X射线剂量光子计数探测器计算机断层扫描对结节特性的影响:一项前性研究
Bjarne Kerber1, Falko Ensle, Jonas Kroschke
1From the Institute for Diagnostic and Interventional Radiology, University Hospital Zurich, University Zurich, Zurich, Switzerland (B.K., F.E., J.K., R.H., C.B., M.M., T.F., L.J.); Advanced Radiology Center, Department of Diagnostic Imaging and Oncological Radiotherapy, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy (C.S., A.R.L.); and Section of Radiology, Department of Radiological and Hematological Sciences, Università Cattolica del Sacro Cuore Rome, Italy (A.R.L.).
光子计数探测器 (PCD-CT) 将剂量降低到X射线相当的水平,保持了对肺结节检测的高灵敏度. 半自动结节体积测量是稳健的,肺RADS分类仍然准确,尽管辐射暴露减少.
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 在瘤学瘤学.
背景情况:
- 肺结节的检测和表征对于早期肺癌诊断至关重要.
- 在CT扫描中减少辐射剂量是一个重要的临床目标.
- 光子计数探测器 (PCD-CT) 技术在保持图像质量的同时提供了剂量降低的潜力.
研究的目的:
- 评估PCD-CT剂量降低到X射线相当水平对肺结节检测,直径,体积和密度的影响.
- 通过半自动化和手动方法,将这些指标与低剂量参考标准进行比较.
- 在降低辐射剂量时评估肺-RADS分类的准确性.
主要方法:
- 101名参与者同时使用PCD-CT进行了低剂量和X射线剂量 (剂量减少) 的非对比胸部CT.
- 用半自动计算机辅助诊断软件测量结节的检测,直径和体积.
- 手动测量结节直径和密度是由两个盲读器执行的.
- 使用Lung-RADS v2022对结节进行分类,并评估图像质量.
主要成果:
- 射线剂量扫描 (0.11 mGy) 实现了高整体灵敏度 (0.94) 的结节检测,特别是固体结节 (>0.95).
- 半自动的结节体积测量显示了剂量降低的稳定性,而固体结节的直径被低估了.
- 肺-RADS分类一致性和准确性在所有方法中保持良好 (科恩斯的k > 0.62,准确性 > 0.78).
- 在X射线剂量扫描上,结节密度被认为较低,但读者的直径测量显示没有显著差异.
结论:
- 使用PCD-CT在X射线相当剂量的半自动结节检测是高度敏感的.
- 半自动结节体积测量在剂量减少下比直径测量更可靠.
- 精确的结节测量和肺RADS分类在X射线剂量水平是可行的,尽管密度可能被低估.
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