1 Department of Radiology, University Hospital and Faculty of Medicine and Dentistry, Palacky University, I. P. Pavlova 6, 77900, Olomouc, Czech Republic. zbynek.tudos@fnol.cz.
2 Department of Radiology, University Hospital and Faculty of Medicine and Dentistry, Palacky University, I. P. Pavlova 6, 77900, Olomouc, Czech Republic.