[1] Univ Crete, Med Sch, Dept Radiol, Iraklion 71110, Greece
[2] Univ Hosp, Dept Med Imaging, Iraklion 71110, Greece
[3] Fdn Res & Technol Hellas FORTH, Computat Biomed Lab CBML Hybrid Imaging, Iraklion 70013, Greece
[4] Univ Ioannina, Dept Radiol, Ioannina 45110, Greece