3D printed phantoms for medical imaging : recent developments and challenges

The rapid growth of 3D printing technology has transformed different fields in medicine, for example the fabrication of medical phantoms - physical models mimicking biological tissue in medical imaging and therapy. These phantoms play a crucial role in quality assurance, education, research and training. Unlike traditional methods, 3D printing enables the creation of anatomically accurate, cost-effective, modular, and customizable phantoms with high geometric freedom. A key advantage is the ability to produce patient-based models, tailored to individual anatomies and pathologies using medical imaging data. The workflow involves processing imaging data, refining 3D models, and selecting suitable 3D printing materials. This overview focuses on the workflow, types of phantoms, and the selection of printing techniques and materials. Besides numerous opportunities, challenges include standardization, validation procedures, and ensuring reliability across different systems. The potential of 3D printing in medical phantom development is evident, promising realistic, cost-effective, and personalized solutions for improved medical research.