扩散权重核磁共振 (MRI) 的可行性,用于检测在内血管动脉瘤修复后的腹腔大动脉内皮瘤
Ming-Yi Hsu1, Chien-Ming Chen1, Ming-Chen Wu1
1Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Linkou, Chang Gung University, No. 5 Fusing St, Guishan District, Taoyuan City 333423, Taiwan.
Radiology
|November 11, 2025
概括
扩散加权成像 (DWI) 与明显扩散系数 (ADC) 映射准确地检测内血管动脉瘤修复后的内泄漏. 这种非对比的MRI方法提供了高灵敏度和特异性,改进了传统方法.
科学领域:
- 放射学和成像学 放射学和成像学
- 血管外科 血管外科
- 医学诊断 医学诊断 医学诊断
背景情况:
- 加多增强型MR血管学依赖于对比剂,这可能带来潜在的风险.
- 扩散加权成像 (DWI) 和明显扩散系数 (ADC) 地图通过分析水扩散来检测内泄漏,提供一种非对比的替代方案.
- 内膜瘤是内血管动脉瘤修复 (EVAR) 后的一个常见并发症.
研究的目的:
- 评估非对比MR血管学 (NC-MRA) 的诊断准确性,包括DWI和ADC映射,用于检测EVAR后的内脏泄漏.
- 为了比较NC-MRA序列与CT血管造影 (CTA) 的疗效,以检测内泄漏.
主要方法:
- 一项前性研究涉及34名参与者,他们在EVAR后3个月内接受了CTA和全面的NC-MRA (DWI,ADC映射,FIESTA,入流逆转恢复,2D PC).
- 两个盲目审查员独立评估了内核泄露,第二次评估包括ADC-FIESTA的融合图像.
- 诊断准确度指标 (灵敏度,特异性,整体准确度) 根据CTA计算;使用Cohen κ. 评估观察者之间的一致性.
主要成果:
- 与ADC映射加上其他NC-MRA序列的DWI与CTA相比,实现了95%的灵敏度,93%的特异性和94%的整体准确性.
- 内泄与大动脉支架流量的平均ADC比率 (0.97) 显著高于血栓与大动脉支架流量的平均ADC比率 (0.52),有助于区分.
- 包括ADC-FIESTA聚变图像改善了观察者之间的协议 (κ = 0.60到0.82).
结论:
- DWI和ADC映射,结合其他NC-MRA序列和ADC-FIESTA融合,提供了一个准确的,非侵入性的方法来检测腹腔大动脉内泄漏.
- 这种非对比的方法提高了EVAR后并发症的诊断能力.
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