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MRI多组分弛豫测量定量MASH肝纤维化、炎症与脂肪变的前瞻性研究

MRI multicomponent relaxometry for liver fibrosis, inflammation, and steatosis in nonalcoholic steatohepatitis: A prospective study.
PubMed 文献 · Eur J Radiol · 2026-05-19

这项前瞻性单中心研究纳入106例经活检确诊的MASH患者和16名健康对照,采用10分钟无对比剂MRI多组分弛豫测量(MCR)联合PDFF与R2*w,以组织病理为参考标准。结果显示细胞外非血管水分数(ECNVwf)与纤维化高度相关(rs=0.80),检测任何纤维化(F1-F4 vs F0)的AUROC为0.94(阈值14.65%,特异度100%,敏感度85%),并与气球样变和炎症相关;PDFF与脂肪变、R2*w与铁亦相关,观察者间一致性优秀。

要点

  • ECNVwf阈值14.65%检测任何纤维化特异度100%、敏感度85%,可作为无创纤维化标志物。
  • PDFF与R2*w分别准确量化脂肪变和铁,AUROC分别为0.96和0.97。
  • MCR协议仅10分钟且无需对比剂,观察者间一致性ICC均>0.97。

核心结论

  • 无对比剂MCR可准确检测MASH纤维化,并综合表征炎症、脂肪和铁沉积,值得进一步多中心研究。

研究设计与样本

  • 前瞻性单中心研究,纳入106例活检确诊MASH成人(68女38男,平均年龄50.5±11.4岁)和16名健康对照(7女9男,33.6±6.2岁)。
  • MRI在活检后6个月内完成,采用10分钟协议:多回波梯度回波(PDFF、R2*w)和多回波自旋回波(MCR)。
  • 以盲法判读的组织病理学为参考标准(纤维化、气球样变、小叶炎症、脂肪变、铁)。
  • 主要生物标志物为细胞外非血管水分数(ECNVwf)。

诊断标准与关键数值

  • ECNVwf与纤维化相关rs=0.80(p<0.001);检测任何纤维化(F1-F4 vs F0)AUROC 0.94,阈值14.65%,特异度100%,敏感度85%,bootstrap 95%CI 14.2-14.7%,序数AUROC 0.87。
  • ECNVwf与气球样变相关rs=0.65(p<0.001),AUROC 0.92;与炎症相关rs=0.52(p<0.001),AUROC 0.94。
  • PDFF与脂肪变相关rs=0.72,AUROC 0.96;R2*w与铁相关rs=0.52,AUROC 0.97。
  • 观察者间一致性ICC:ECNVwf 0.973,R2*w 0.979,PDFF 0.994。

临床应用与阅片要点

  • ECNVwf可作为无创纤维化标志物,阈值14.65%时特异度100%,适合排除纤维化或确认存在。
  • PDFF和R2*w可同步量化脂肪变和铁,一次10分钟扫描完成多参数评估。
  • 观察者间一致性优秀,支持在临床报告中常规测量ECNVwf、PDFF和R2*w。

局限性

  • 单中心前瞻性研究,对照样本量较小(16例),结论需多中心验证。

以上解读依据论文摘要(全文未开放获取或许可不允许翻译转载)。

英文原文(摘要)· 点击展开

OBJECTIVES: To validate contrast-free MRI multicomponent relaxometry (MCR) for noninvasive quantification of fibrosis, inflammation, steatosis, and iron in biopsy-proven metabolic dysfunction-associated steatohepatitis (MASH), formerly nonalcoholic steatohepatitis (NASH).

MATERIALS AND METHODS: In this prospective single-center study, adults with biopsy-confirmed MASH underwent MRI within 6 months of biopsy; healthy volunteers served as controls. The 10-minute protocol comprised multi-echo gradient-echo (for proton density fat fraction, PDFF, and R2*w) and multi-echo spin-echo (for MCR). Histopathology served as the reference (fibrosis, ballooning, lobular inflammation, steatosis, iron) read blinded to imaging. The primary biomarker was extracellular non-vascular water fraction (ECNVwf).

STATISTICS: Spearman correlations (rs); receiver operating characteristic (ROC) curve analysis with area under the ROC (AUROC); bootstrap validation (1000 replicates); interobserver agreement by intraclass correlation coefficient (ICC).

RESULTS: 122 participants: 106 MASH patients (68 women, 38 men; mean age 50.5 ± 11.4 years) and 16 controls (7 women, 9 men; 33.6 ± 6.2 years). ECNVwf correlated with fibrosis (rs = 0.80; p < 0.001) and detected any fibrosis (F1-F4 vs F0) with AUROC 0.94 (threshold 14.65%; specificity 100%; sensitivity 85%; bootstrap 95% CI: 14.2-14.7%; ordinal AUROC: 0.87). ECNVwf correlated with ballooning (rs = 0.65; p < 0.001; AUROC 0.92) and inflammation (rs = 0.52; p < 0.001; AUROC 0.94). PDFF correlated with steatosis (rs = 0.72; AUROC 0.96), and R2*w with iron (rs = 0.52; AUROC 0.97). Interobserver agreement was excellent (ICC: ECNVwf 0.973; R2*w 0.979; PDFF 0.994).

CONCLUSION: Contrast-free MCR enables accurate detection of fibrosis and comprehensive characterization of inflammation, fat, and iron in MASH, warranting further multicenter studies.

来源:Eur J Radiol,查看原文。版权归原作者所有。

引用

  1. Leao Filho H, Oliveira CP, Carrilho FJ, et al. MRI multicomponent relaxometry for liver fibrosis, inflammation, and steatosis in nonalcoholic steatohepatitis: A prospective study. Eur J Radiol. 2026. PMID: 42184601. doi:10.1016/j.ejrad.2026.112946

供执业医师工作参考,不替代临床判断;数值与分级以指南原文为准。