Fig. 4From: Optimising total knee replacement imaging: a novel 3D printed PET/CT anthropomorphic phantom for metal artefact simulationSchematic diagram showing the method of activity injection into the trabecular bone compartment of the phantom. The inlet syringe contains the FDG injected (red), and the outlet syringe (blue) is partially filled with saline to receive the excess saline coming back from the phantom during the injection (red arrows)Back to article page