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定量T1映射检测出血脑屏障的破坏,显然不增强多发性硬化病变的病变
Graziella Donatelli1, Paolo Cecchi1, Gianmichele Migaleddu2
1Neuroradiology Unit, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy; Imago7 Research Foundation, Pisa, Italy.
NeuroImage. Clinical
|September 17, 2023
概括
定量过渡状态成像 (QTI) 可以检测到微妙的血脑屏障 (BBB) 泄漏在多发性硬化症 (MS) 病变不能在传统的MRI上可见. 这种技术可能有助于监测多发性硬化患者的疾病活性和治疗反应.
科学领域:
- 神经成像是一种神经成像.
- 放射学 放射学是一门学科.
- 多发性硬化症的发病因子
背景情况:
- 血脑屏障 (BBB) 的破坏是多发性硬化症 (MS) 病变的标志,在活跃和慢性阶段都明显.
- 在急性病变中,公开的BBB干扰会在T1加权的MRI上引起对比度增强.
- 慢性病变中微妙的BBB变化在放射学上是不可见的,但可能表明正在进行的炎症和疾病进展.
研究的目的:
- 调查3D定量过渡状态成像 (QTI) 在检测和量化微妙的BBB泄漏在明显不增强的病变 (ANELs) 在MS的实用性.
- 在ANEL中测量T1缩短 (ΔT1) 作为对比介质泄漏的指标.
主要方法:
- 34名复发性复发性多发性硬化症患者接受了3T脑部MRI与常规序列和QTI在对比剂施用前和后.
- 在对比前和后的QTI衍生T1地图的voxel-wise减去生成了ΔT1地图.
- ANEL中的 ΔT1 值与增强的病变,正常的白质和非多发性硬化症患者的参考组进行了比较.
主要成果:
- 与增强病变 (297.71 ± 177.52 ms; p < 0.0001) 相比,ANEL (57.45 ± 48.27 ms) 中的平均 ΔT1 显著较低.
- 在ANEL中,平均ΔT1高于看起来正常的白质 (36.57 ± 10.53 ms; p < 0.005).
- 52%的ANEL显示DTT1值超过非MS对照的白质值.
结论:
- 源自QTI的ΔT1映射量化了ANEL中与对比相关的T1缩短,表明微妙的BBB中断.
- 在ANEL ΔT1值与非MS参考分布的偏差表明BBB泄漏持续存在.
- 这种定量成像方法可以帮助描述多发性硬化病理,并监测疾病活性和治疗反应.
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