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阿尔茨海默氏症成像联盟

Grace Gillis1,2, Gaurav V Bhalerao1, Jasmine Blane1,2

  • 1University of Oxford, Oxford, Oxfordshire, UK.

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概括
此摘要是机器生成的。

多模式核磁共振 (MRI) 显示了整个痴呆症谱的明显大脑变化. 像扩散MRI这样的先进成像技术可以在结构变化明显之前检测出早期的神经退行症状.

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科学领域:

  • 神经成像是一种神经成像.
  • 神经学 神经学
  • 放射学 放射学是一门学科.

背景情况:

  • 牛津大脑健康诊所 (OBHC) 使用标准化的MRI协议,与英国生物银行标准保持一致.
  • 从300多名NHS记忆诊所患者和100名健康志愿者 (HV) 中收集了数据.

研究的目的:

  • 在现实世界的记忆诊所环境中,在不同的诊断组中探索成像衍生的表型 (IDP) 的多式模式.
  • 调查各种MRI模式在区分痴呆症,轻度认知障碍 (MCI) 和无痴呆相关诊断 (NDRD) 之间的实用性.

主要方法:

  • 来自342名患者和107名HV的MRI扫描使用质量控制的管道进行处理.
  • 诊断是从电子健康记录中提取的:痴呆,MCI和NDRD.
  • 顺序回归分析测试了IDP和诊断之间的关联,控制共变量.

主要成果:

  • 所有6种MRI模式在诊断组之间都有显著差异.
  • 健康的志愿者和痴呆症患者在所有方式上有所不同.
  • 患有MCI的患者表现出比HV更高的平均扩散度和较低的白质完整度.
  • 痴呆症患者的体积较小,白质超强度 (WMHs) 比MCI患者更多.
  • 与HV相比,NDRD患者的左海马平均扩散率较高,尽管大脑体积相似.

结论:

  • 多模式MRI评估显示了整个痴呆症谱的独特的神经成像模式.
  • 非传统的MRI技术,如扩散和 perfusion 成像,可以提供关于神经退行机制的见解.
  • 微观结构和 perfusion 变化可能是神经退行症的早期指标,可能是 WMH 形成的先兆.