对四肢骨瘤的扩散加权成像-读者间分析和增量值比传统的MR成像更高
Mina Guirguis1, Anurag Gupta1, Uma Thakur1
1Radiology, UT Southwestern Medical Center, Dallas, Texas, USA.
The British journal of radiology
|July 26, 2023
概括
扩散加权成像 (DWI) 和明显扩散系数 (ADC) 地图显示良性和恶性骨瘤之间的差异. 然而,传统的MRI是足够的诊断,从DWI的有限的附加值.
科学领域:
- 放射学 放射学是一门学科.
- 在瘤学瘤学.
- 医疗成像医学成像
背景情况:
- 准确的骨瘤特征对于适当的患者管理至关重要.
- 传统的MRI是评估骨瘤的主要工具,但其诊断准确性可能有限.
- 扩散加权成像 (DWI) 和明显扩散系数 (ADC) 映射为组织微观结构提供了洞察力.
研究的目的:
- 评估DWI和ADC地图在描述骨瘤中的增量诊断价值.
- 为了确定是否将DWI添加到传统的MRI中,可以提高骨损伤的诊断准确度.
- 评估DWI/ADC比率在区分良性和恶性骨瘤中的有用性.
主要方法:
- 一项多读者,横截面验证研究,涉及四名肌肉骨放射科医生.
- 骨瘤的评估分为两轮:首先使用传统的MRI,然后添加DWI和ADC地图.
- 读者提供了二元分类 (良性/恶性),并计算了包括AUC在内的诊断性能指标.
主要成果:
- 分析了133种骨瘤 (76种良性,57种恶性).
- 诊断准确度指标 (灵敏度,特异性,PPV,NPV) 在DWI和没有DWI的情况下基本相似.
- 两轮读者间的共识都很好,放射科医生的信心在DWI中略有增加 (p < 0.001).
- ADC值和DWI/ADC比率显示了良性和恶性瘤之间的显著差异.
结论:
- DWI和ADC参数表明良性和恶性骨瘤之间的统计学上显著差异.
- 虽然DWI轻微提高了放射科医生的信心,但其在诊断准确性的增量价值是有限的.
- 传统的MRI仍然足够用于骨瘤的特征,这表明在这种情况下,常规DWI使用的额外益处有限.
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