In this study, a new series of 3D printable rubber-elastomeric polymer called PORO-LAY materials have been investigated regarding their suitability to serve as tissue mimicking materials (TMMs) for MRI phantoms. PORO-LAY materials have been previously used in biofuel cell developments, particle filtrations and modeling elastic tissues. We evaluated the electrical permittivity, electrical conductivity, spin-lattice T ₁-relaxation time and acquired the MRI contrast for simple and multi-material complex 3D printed shapes made of PORO-LAY materials at 3.0 T. The results showed a T ₁ diversity within PORO-LAY materials, which reveals in different MR image contrasts. The outcome favors PORO-LAY as an appropriate candidate that can be used in multi-materials additive manufacturing to produce realistic shapes such as white/grey matter structures for MRI phantoms with visible clear contrast. Finally, this study could serve as a reference and guideline when using these materials as tissue mimicking materials for different types of human body tissues and provide a promising opportunity to design novel phantoms for a wide range of MRI applications.

在这项研究中，研究了一系列新的 3D 可打印橡胶弹性聚合物，称为 PORO-LAY 材料，研究它们作为 MRI 幻影的组织模拟材料 (TMM) 的适用性。PORO-LAY 材料以前曾用于生物燃料电池开发、颗粒过滤和弹性组织建模。我们评估了介电常数、电导率、自旋晶格T _{1 -}弛豫时间，并在 3.0 T 下获得了由 PORO-LAY 材料制成的简单和多材料复杂 3D 打印形状的 MRI 对比度。结果显示T ₁PORO-LAY 材料的多样性，体现在不同的 MR 图像对比度中。结果表明 PORO-LAY 是一种合适的候选材料，可用于多材料增材制造，以产生逼真的形状，例如具有可见清晰对比度的 MRI 幻影的白/灰质结构。最后，当使用这些材料作为不同类型人体组织的组织模拟材料时，这项研究可以作为参考和指南，并为设计用于广泛 MRI 应用的新型体模提供了有希望的机会。