[18a-D62-1~6] 2.4 医用応用

10:15 〜 10:30英語発表

[18a-D62-2] Evaluating Radiation Modulation Capabilities of 3D Printed PLA, ABS, and TPU with Different In-fill Densities and Phase Angles for Nuclear Medicine Applications

〇(D)ToniBeth Guatato Lopez^1,2,4, James Harold Cabalhug², Emmanuel Arriola^1,2,4, Marynella Laica Afable², Ranier Jude Wendell Lorenzo², Alvie Asuncion Astronomo³, Fred Liza², Robert Dizon², Gil Nonato Santos⁴ (1.Department of Science and Technology, 2.Metals Industry Research and Development Center, 3.Philippine Nuclear Research Institute, 4.De La Salle University)

キーワード：

3D printing、radiation shielding、attenuation simulation

The application of 3D printing technologies in the field of radiotherapy presents a novel approach to developing custom-tailored devices for radiation shielding and modulation. This study investigates the effects of varying in-fill densities and design structures on the empirical density and radiation attenuation properties of three common 3D printing materials: polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), and thermoplastic polyurethane (TPU). Using the water displacement method, we measured the empirical density of 3D printed samples with different in-fill patterns and densities. The results were used to assess the correlation between in-fill density and material density. Furthermore, mass attenuation coefficients were calculated using the XCOM and EpiXS software programs to determine the effectiveness of each sample in attenuating radiation. Varying printing infill densities and phase angles were included to also investigate the resulting attenuation characteristics of the material. These were all part of the DOE incorporated to fully understand the interaction of varied in-fill densities and phase angles. The findings demonstrate that manipulating the in-fill density and design significantly impacts the density and, consequently, the radiation attenuation properties of the printed materials. PLA, ABS, and TPU samples with higher in-fill densities showed improved attenuation characteristics, making them potentially effective for use in radiotherapy applications where precise dose modulation is critical. This study highlights the importance of optimizing 3D printing parameters to enhance the functional properties of printed materials for medical applications, paving the way for personalized and efficient radiotherapy solutions.