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European Radiology:帕金森病的SMwI MRI前瞻性多中心研究

2022-06-06 shaosai MedSci原创

最近,临床上开发了感光图加权成像(SMwI)技术以改善描绘含铁结构的信噪比和对比度-噪声比。最近的研究进一步表明,SMwI在评估3T下的黑质高浓度方面优于SW。

最近有学者提出,在3T或7T MR的SWI上黑质密度过高或黑质体1可能作为特发性帕金森病(IPD)的一个新的成像标志。一项荟萃分析显示,在3T MR下区分IPD与对照组的集合敏感性和特异性分别为94.6%和94.4%。然而,由于研究入选的患者病程较长、IPD误诊(5-25%)以及空间分辨率和翻转角度都会影响黑质增生的诊断效果,因此影响到了该技术的广泛应用

最近,临床上开发了感光图加权成像(SMwI)技术以改善描绘含铁结构的信噪比和对比度-噪声比。最近的研究进一步表明,SMwI在评估3T下的黑质高浓度方面优于SW。因此,目前关于SMwI在多中心环境下使用不同供应商的各种MRI扫描仪的结果的数据是有限的。

近日,发表在European Radiology杂志的一项研究在10个不同的中心使用不同的MRI扫描仪测试标准化的SMwI与DAT PET诊断神经退行性帕金森病方面的诊断性能为该技术的标准化应用流程的建立及推广提供了数据支持

本研究在2019年11月至2020年10月期间前瞻性地招募了257名受试者,其中包括157名神经退行性帕金森病患者,54名非神经退行性帕金森病患者,以及来自10家医院的46名健康受试者。所有参与者都接受了SMwI和18F-FP-CIT PET检查。SMwI由两名独立审查员解释黑质体1的存在或不存在异常,并通过共识解决差异。 18F-FP-CIT PET被用作参考标准。使用Cohen's kappa系数测试观察者之间的一致性。McNemar's检验用于检验每个参与者和黑质(SN)的SMwI和18F-FP-CIT PET解释之间的一致性。 

每个SN和参与者的观察者之间的一致性分别为0.924和0.942。每个SN和参与者的SMwI的诊断敏感性分别为97.9%和99.4%;其特异性分别为95.9%和95.2%,其准确性分别为97.1%和97.7%。SMwI和18F-FP-CIT PET的结果没有显著差异(P>0.05,对SN和参与者而言)。


 71岁的特发性帕金森病女性患者。 a 低信号度区掩盖了黑质两侧的三层(内层低信号、中层高信号和外层低信号度)的分化(上排箭头)。在垂直于中脑的重新格式化的图像上,红核下方的黑质也有相应的异常(下行箭头)。A,前部;P,后部;R,右侧;L,左侧;S,上部;I,下部

本研究表明,在多中心环境下,使用不同的MRI扫描仪确定黑质变性,标准化的高空间分辨率SMwI的诊断性能与18F-FP-CIT PET相当,表明SMwI对于评估帕金森病患者具有普遍性。

原文出处

Young Hee Sung,Joong-Seok Kim,Sang-Won Yoo,et al.A prospective multi-centre study of susceptibility map-weighted MRI for the diagnosis of neurodegenerative parkinsonism.DOI:10.1007/s00330-021-08454-z

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