A process for preparing a phantom for medical imaging

The invention provides a process for producing a phantom (1) for medical imaging with a 3D printing apparatus, wherein the spatial coordinates of the produced phantom (1) mixtures of substances are assigned (100), each fuel mixture has a predetermined value of a predetermined imaging parameter and wherein the mixtures are printed spatially by the 3D printing apparatus from starting materials (300). The invention provides the advantage that a test can be simplified by imaging techniques and designed inexpensively.