3D printing techniques and materials have become widely available in the last couple of decades and remains an important topic of research as the equipments and supplements gets chipper. This study aims to evaluate the attenuation behaviour of several commercially available 3D printing filaments (ABS and PLA-based filaments and other polymers blends) over standard X-ray beams ranging from ~30 keV - to ~50 keV and comparing the experimental results with theoretical data of Cortical Bone, Soft Tissue and PMMA. It was used the transmission method to obtain experimental attenuation coefficients to all materials. HVL for the materials were also calculated. Results show that PLA-based printing filaments mixed with metals (Al, BRASS and Cu) has higher attenuation than pure PLA. Comparing the experimental data with theoretical cross section of Soft Tissue, Cortical Bone and PMMA, it was possible to observe that with the increase of beam energy, ABS-based and other blends’ attenuation behaviour agree with PMMA/Soft tissue. None of the studied materials showed agreement of attenuation with Cortical Bone. Some variations of PLA (SILK, Black and Bone) and some of the other blends of PETG and TPU showed good agreement with Soft Tissue/PMMA since about 30 keV and it can be concluded that these filaments can be used as substitute of PMMA for mimetizing soft tissue in 3D printed phantoms.

在过去的几十年中，3D打印技术和材料已经广泛使用，并且随着设备和补品的削片，它仍然是研究的重要课题。这项研究的目的是评估几种市售3D打印灯丝（ABS和PLA基灯丝以及其他聚合物混合物）在标准X射线束〜30 keV-〜50 keV范围内的衰减行为，并将实验结果与理论值进行比较皮质骨，软组织和PMMA的数据。使用传输方法获得对所有材料的实验衰减系数。还计算了材料的HVL。结果表明，与金属（Al，黄铜和铜）混合的PLA基打印丝比纯PLA具有更高的衰减。将实验数据与软组织的理论横截面进行比较，皮质骨和PMMA，可以观察到，随着束能量的增加，基于ABS的混合物和其他混合物的衰减行为与PMMA /软组织一致。所研究的材料均未显示与皮质骨衰减一致。PLA的一些变化（丝绸，黑色和骨头）以及PETG和TPU的其他一些混合物与软组织/ PMMA表现出良好的一致性，因为大约30 keV，可以得出结论，这些细丝可以替代PMMA进行模仿3D打印幻像中的软组织。