Radiology:R132H突变弥漫性胶质瘤中的BOLD 血管异常调节的程度更严重

2018-02-26 shaosai MedSci原创

本研究旨在验证弥漫性胶质瘤R132H突变状态对肿瘤切除术后血管异常调节程度和残余血氧水平依赖异常程度的影响,研究人员将结果发表在Radiology上。

本研究旨在验证弥漫性胶质瘤R132H突变状态对肿瘤切除术后血管异常调节程度和残余血氧水平依赖异常程度的影响,研究人员将结果发表在Radiology上。

本研究共纳入了39例弥漫性胶质瘤并行术前平面回波成像和BOLD功能磁共振成像的患者。BOLD血管异常条件图是通过识别时间轴上相似与肿瘤且不同于正常脑组织的体素得到的。肿瘤和血管异常条件上的空间叠加区域时利用Dice系数得到的,肿瘤边缘外的BOLD异常区域定量为仅BOLD异常分数(BOF)。利用线性回归模型评价肿瘤手术切除后R132H状态对Dice系数、BOF和残余BOLD异常的影响。

结果为,与R132H野生型(R132H-)胶质瘤比较,R132H-突变型(R132H+)胶质瘤在BOLD异常和肿瘤具有更明晰的空间叠加(R132H+和R132H-平均Dice系数分别为0.659 ± 0.02、0.327 ± 0.04; P < .001)、较少的肿瘤边缘外BOLD异常(R132H+和R132H-平均BOF分别为0.255 ± 0.03、0.728 ± 0.04; P < .001)以及较少的术后BOLD异常(R132H+和R132H-的残余分数分别为0.046 ± 0.0047、0.397 ± 0.045; P < .001)。ROC曲线分析表明利用Dice系数和BOF计算在鉴别R132H+肿瘤与 R132H-肿瘤有更高的敏感性和特异性(曲线下面积分别为0.967 and 0.977)。

本研究表明,R132H图像状态是影响切除术后肿瘤相关血管调节异常和残余血管调节异常的重要变量。

原始出处:

Englander ZK, Horenstein CI, Bowden SG. et al.Extent of BOLD Vascular Dysregulation Is Greater in Diffuse Gliomas without Isocitrate Dehydrogenase 1 R132H Mutation.Radiology.DOI: 10.1148/radiol.2017170790

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

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