用超快速DCE-MRI评估乳腺病变:时间分辨率对药理学的影响
Tianwen Xie1, Yan Huang1, Caixia Fu2
1Department of Radiology, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.
Magnetic resonance imaging
|September 3, 2025
概括
在超快的动态对比增强MRI中降低时间分辨率显著改变了Ktrans和kep等药理学参数. 然而,乳腺癌的诊断性能基本上没有受到影响,建议分辨率低于18秒.
科学领域:
- 放射学
- 医学成像
- 癌症学
背景情况:
- 超快动态增强对比 (UF-DCE) 的MRI对于乳腺癌的诊断至关重要.
- 时间分辨率是影响药理学参数准确性的关键因素.
研究的目的:
- 评估不同时间分辨率对UF- DCEMRI产生的药理学参数 (Ktrans, kep, ve) 的影响.
- 评估这些变化如何影响乳腺癌诊断性能.
主要方法:
- 在89名患有97例乳腺病变的患者中进行前性研究.
- 使用CAIPIRINHA-Dixon-TWIST-VIBE (CDTV) 的UF-DCEMRI,其原始分辨率为4. 5秒.
- 用Tofts模型和基于人群的AIF进行药物动力学建模.
主要成果:
- 时间分辨率下降增加了Ktrans和kep值,而ve则下降了.
- 诊断性能 (AUC) 在测试分辨率之间没有显著差异.
- 与4. 5秒参考值相比,Ktrans和kep的时间分辨率< 18秒显示< 10%的偏差.
结论:
- 时间分辨率显著影响了在UF- DCEMRI中以人口为基础的AIF计算的药理学参数.
- 由于时间分辨率降低,乳腺癌特征的诊断准确性并没有受到重大影响.
- 对于可靠的药理动力学分析,建议时间分辨率低于18秒.
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