My name is Jaroslav Ptáček. I am in charge of Medical Physics and Radiation Protection Department in the University Hospital in Olomouc Czech Republic. We use our Original Prusa 3D printer to produce testing equipment, so-called phantoms, for machines used in nuclear medicine – this mainly concerns computer tomography devices, such as SPECT/CTs or PET/CTs. A phantom is a vessel of a specific shape with several containers of different sizes inside – these are filled with RI solution. We are using spherical containers from the original equipment manufacturer, and also 3D-printed elliptical containers – these are mainly used to compare the results with the spherical containers. It’s neccesary to use materials that have properties equivalent to human tissue – as far as gamma rays and X-rays are concerned. Materials such as ABS or PETG have density similar to water, so when the 3D-printed parts are exposed to X-rays or gamma rays, they produce results similar to human tissue. The benefits of using a 3D printer are obvious: we can design and produce custom shapes and we can have them pretty much in an instant – we don’t need to wait for someone to order a batch and have it delivered. Plus, we’re saving a considerable amount of money by 3D printing these models. We know exactly what we’re getting and that the produced objects will suit our requirements perfectly.