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Stiffness of liver-mimicking phantom for Magnetic Resonance Elastography

机译:用于磁共振弹性成像的肝脏模拟幻像的刚度

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Magnetic Resonance Elastography (MRE) is a powerful technique that presents a graphic scheme of how the properties of different tissues respond when stimulated with mechanical waves [1]. The distortion of the wave suggests an increase in the tissue stiffness. The increase in the stiffness has been identified as pathologies [2]. Four phantoms of grenetine gel were produced. The phantoms were created to mimic lesions with varied stiffness. The grenetine concentrations included were 10%, 15% and 20% with the same dimensions. The samples were introduced in a base with a concentration of 5% of grenetine gel. All images were collected at 3.0 T Siemens scanner using the sequence gradient-recalled echo (GRE) based MRE two-dimensional, TR=50 msec, flip angle=25, FoV= 271 mm, slice thickness=5mm. This experiment demonstrated that the technique of Magnetic Resonance Elastography (MRE) shows the map of stiffness in tissue and the way in which mechanical waves propagate in tissue with different densities. The wave pattern shows how the different stiffness destroys gradually the wave.
机译:磁共振弹性显影(MRE)是一种强大的技术,介绍了在用机械波刺激时不同组织的性质如何应对的图形方案[1]。波浪的变形表明组织刚度的增加。刚度的增加已被鉴定为病理[2]。产生了凝胶凝胶的四个幽灵。产生幽灵以模仿具有不同刚度的病变。包含的Grenetine浓度为10%,15%和20%,尺寸相同。将样品在碱中引入浓度为5%的Grenetine凝胶。使用基于序列梯度召回的回波(GRE)的MRE二维,TR = 50毫秒,翻转角= 25,FOV = 271mm,切片厚度= 5mm,所有图像在3.0 T Siemens扫描仪中收集。该实验表明,磁共振弹性显影(MRE)的技术显示了组织中刚度的映射和机械波在具有不同密度的组织中传播的方式。波形图案显示不同的刚度如何逐渐破坏波浪。

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