用于解剖结构专用 3D 打印 MRI 线圈的 3D 打印材料的介电性能。
Dielectric properties of 3D-printed materials for anatomy specific 3D-printed MRI coils.
机构信息
Department of Radiology, Wisconsin Institute for Medical Research, University of Wisconsin, Madison, WI 53705, USA; Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI 53706, USA.
Department of Radiology, Wisconsin Institute for Medical Research, University of Wisconsin, Madison, WI 53705, USA.
出版信息
J Magn Reson. 2018 Apr;289:113-121. doi: 10.1016/j.jmr.2018.02.013. Epub 2018 Feb 21.
Additive manufacturing provides a low-cost and rapid means to translate 3D designs into the construction of a prototype. For MRI, this type of manufacturing can be used to construct various components including the structure of RF coils. In this paper, we characterize the material properties (dielectric constant and loss tangent) of several common 3D-printed polymers in the MRI frequency range of 63-300 MHz (for MRI magnetic field strengths of 1.5-7 T), and utilize these material properties in full-wave electromagnetic simulations to design and construct a very low-cost subject/anatomy-specific 3D-printed receive-only RF coil that fits close to the body. We show that the anatomy-specific coil exhibits higher signal-to-noise ratio compared to a conventional flat surface coil.
增材制造为将 3D 设计转化为原型构建提供了一种低成本、快速的方法。对于 MRI 而言，这种制造方式可用于构建各种组件，包括 RF 线圈的结构。在本文中，我们在 MRI 频率范围为 63-300 MHz（适用于 1.5-7 T 的 MRI 磁场强度）下对几种常见的 3D 打印聚合物的材料特性（介电常数和损耗正切）进行了表征，并在全波电磁模拟中利用这些材料特性来设计和构建一个非常低成本的、针对特定受检者/解剖结构的 3D 打印接收专用 RF 线圈，使其与身体贴合。我们发现，与传统的平面线圈相比，该针对特定解剖结构的线圈具有更高的信噪比。
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