Medical Engineering and Technology Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, P. R. China.
Qingdao 3E3D Tech. Co. Ltd., Qingdao, P. R. China.
J Appl Clin Med Phys. 2022 Feb;23(2):e13495. doi: 10.1002/acm2.13495. Epub 2021 Dec 8.
Three materials of polylactic acid (PLA), polyamide 12 (PA12), and light curing resin (LCR) were used to construct phantom using 3D printing technology. The mechanical and medical imaging properties of the three materials, such as elastic modulus, density, effective atomic number, X-ray attenuation coefficient, computed tomography (CT) number, and acoustic properties, were investigated. The results showed that the elastic modulus for PLA was 1.98 × 10 MPa, for PA12 was 848 MPa, for LCR was 1.18×10 MPa, and that of three materials was close to some bones. In the range of 40∼120 kV, the X-ray attenuation coefficient of three materials decreased with increasing tube voltage. The CT number for PLA, PA12, and LCR was 144, -88, and 312 Hounsfield units at 120 kV tube voltage, respectively. The density and the effective atomic number product (ρ*Z ) were computed from three materials and decreased in the order of LCR, PLA, and PA12. The acoustic properties of materials were also studied. The speeds of sound of three materials were similar with those of some soft tissues.
三种材料，聚乳酸（PLA）、聚酰胺 12（PA12）和光固化树脂（LCR），被用于使用 3D 打印技术构建体模。对这三种材料的力学和医学成像性能，如弹性模量、密度、有效原子序数、X 射线衰减系数、计算机断层扫描（CT）数和声学性能进行了研究。结果表明，PLA 的弹性模量为 1.98×10 MPa，PA12 的弹性模量为 848 MPa，LCR 的弹性模量为 1.18×10 MPa，且这三种材料的弹性模量与一些骨骼相近。在 40∼120 kV 管电压范围内，三种材料的 X 射线衰减系数随管电压的升高而降低。在 120 kV 管电压下，PLA、PA12 和 LCR 的 CT 值分别为 144、-88 和 312 亨氏单位。密度和有效原子序数乘积（ρ*Z）是根据三种材料计算得出的，其顺序为 LCR、PLA 和 PA12。还研究了材料的声学性能。三种材料的声速与一些软组织的声速相似。
