T1映射磁共振成像预测功能下降的情况
Aurélie Huber1, Ibtisam Aslam2, Lindsey Crowe2
1Department of Medicine, Division of Nephrology and Hypertension, University Hospitals of Geneva, Geneva, Switzerland.
Clinical kidney journal
|March 24, 2025
概括
在MRI上进行皮质T1映射显示,慢性病和移植患者中,与脏不良结果有很强的关联. 然而,它并没有提高现有的扩散权重MRI模型对功能下降的预测准确度.
科学领域:
- 放射学和成像科学 放射学和成像科学
- 科和脏疾病研究研究
- 生物医学工程和医学物理.
背景情况:
- 皮间歇性纤维化是功能预后的关键指标,传统上通过活检进行评估.
- 扩散权重 (DW) 磁共振成像 (MRI) 为评估纤维化和预测慢性病 (CKD) 和移植患者的功能下降提供了一种非侵入性方法.
- 正在研究T1和T2映射MRI序列的潜力,以非侵入性评估纤维化和预测功能预后.
研究的目的:
- 评估T1和T2映射MRI序列的预测能力,以评估CKD患者和移植患者的功能下降.
- 确定T1和T2映射的联合使用是否提高了预测脏结果的既定DW-MRI模型的预后能力.
- 调查MRI衍生T1和T2映射参数与纤维化进展之间的关联.
主要方法:
- 一项前性研究,包括197名患者 (42名CKD,155名移植) 接受了多参数MRI无对比.
- 进行了活检,然后在一周内进行核磁共振;实验室参数 (eGFR,蛋白尿) 在2.2年的中位随访期间进行了监测.
- 多变量考克斯回归模型被用来评估T1和T2映射的预测能力,包括DW-MRI参数 (ΔADC),eGFR和蛋白尿对于快速GFR下降或置换治疗开始的初级终点.
主要成果:
- 在无变量分析中,皮层T1映射显示出与较差的结局 (HR 3.02,95% CI 1.44-6.33) 有显著的关联.
- T2映射序列没有显示出对结局的显著预测价值.
- 将皮质T1纳入已建立的DW-MRI模型 (ΔADC,eGFR,蛋白尿) 并没有显著改善危险比率 (HR 4.36与4.62),也没有显著增加Harrell的C指数 (0.79与0.77).
结论:
- 皮质T1映射是患有脏疾病和异位移植的患者中脏不良结果的重要独立预测因子.
- 尽管有预后关联,皮质T1映射并没有提高现有的基于DW-MRI的功能下降模型的预测性能.
- 当与DW-MRI参数相结合时,T2映射序列没有提供额外的预后信息.
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