Dielectric properties of 3D-printed materials for anatomy specific 3D-printed MRI coils.

Dielectric properties of 3D-printed materials for anatomy specific 3D-printed MRI coils.
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DOI:
10.1016/j.jmr.2018.02.013
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发表时间:
2018-04
期刊:
Journal of magnetic resonance (San Diego, Calif. : 1997)
影响因子:
--
通讯作者:
McMillan AB
McMillan AB
中科院分区:
其他
文献类型:
--
作者:
Behzadnezhad B;Collick BD;Behdad N;McMillan AB

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增材制造提供了一种低成本和快速的方法,将3D设计转化为原型的构造。对于MRI,这种类型的制造可用于构建各种组件,包括射频线圈的结构。在本文中,我们描述了几种常见的3d打印聚合物在磁共振频率范围为63 MHz至300 MHz (MRI磁场强度为1.5 T - 7 T)的材料特性(介电常数和损耗正切),并利用这些材料特性在全波电磁模拟中设计和构建了一个非常低成本的受试者/解剖特定的3d打印仅接收射频线圈。我们表明,与传统的平面线圈相比,解剖特异性线圈具有更高的信噪比。
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 MHz to 300 MHz (for MRI magnetic field strengths of 1.5 T – 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.
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