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Radiology:IDH1突变胶质瘤在超高分辨率3D MR波谱下会有什么发现?

2020-04-11 网络 网络

异柠檬酸脱氢酶(IDH)突变在胶质瘤中是非常常见的,会导致D- 2- 羟基戊二酸共代谢物(D-2HG)水平升高。因此,D-2HG水平可作为IDH突变胶质瘤非常有价值的影像学标记物。

背景

异柠檬酸脱氢酶(IDH)突变在胶质瘤中是非常常见的,会导致D- 2- 羟基戊二酸共代谢物(D-2HG)水平升高。因此,D-2HG水平可作为IDH突变胶质瘤非常有价值的影像学标记物。

目的

本研究旨在建立和评价超高分辨率3D MR波谱成像方案来形成IHD突变胶质瘤的D-2HG图和肿瘤代谢图。

材料与方法

本研究纳入了行3T 全脑MR波谱成像的IDH1突变患者和健康志愿者。D-2HG图体素为5.2 × 5.2 × 12 mm采用超高分辨率方法被分割为1.7 × 1.7 × 3 mm大小。该超高分辨率方法是联合加权总变异、基于特征的非局部均值以及高空间分辨率的解剖成像实现的。通过对健康志愿者、模体和患者进行扫描数据进行评价。利用Mann-Whitney U进行检测超高分辨率方法是否能获得最高信噪比和结构相似指数。

结果

对3名IDH1突变胶质瘤患者和3名健康志愿者进行扫描。对20名健康志愿者进行未取样的MR波谱成像模拟。模拟数据仿样内插法相比,与超高分辨率法能够获得提高峰值信噪比和结构相似指数,分别提高约62% (P < .05)、7.3% (P < .05)。相应地,该方法能够极大提高组织对比度和结构显示。

结论

超高分辨率全脑D-2HG图通过超高分辨框架通过对低分辨率图像进行去采样形成,并可应用于IDH-1突变胶质瘤患者。

原始出处:

Li X, Strasser B, Jafari-Khouzani K.et al.Super-Resolution Whole-Brain 3D MR Spectroscopic Imaging for Mapping D-2-Hydroxyglutarate and Tumor Metabolism in Isocitrate Dehydrogenase 1-mutated Human Gliomas.DOI:10.1148/radiol.2020191529

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    2020-07-13 Tamikia
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