3D Printed Multi-material Medical Phantoms for Needle-tissue Interaction Modelling of Heterogeneous Structures

Abstract The fabrication of multi-material medical phantoms with both patient-specificity and realistic mechanical properties is great importance for the development surgical planning training. In this work, a 3D printing system phantom manufacturing was developed. Rigid elastomeric materials are firstly combined in such application an accurate tactile feedback. designed multiple layers, where silicone ink, Thermoplastic Polyurethane (TPU), Acrylonitrile Butadiene Styrene (ABS) were chosen as skin, soft tissue, bone, respectively. Then, printed utilized investigation needle-phantom interaction by needle insertion experiments. characterized skin-soft tissue interfacial puncture force, depth, number force peaks. experiments demonstrated that conditions, i.e. grease ratio, thickness infill rate, played effective roles regulating interaction. Moreover, influences material properties, including ultimate stress, on studied finite element simulation. Also, patient-specific forearm printed, anatomical features acquired from Computed Tomography (CT) data. This study provided potential method tunable offered guidelines better design.