[1] Norfolk & Norwich Univ Hosp, Dept Radiol, Norwich, Norfolk, England
[2] Univ Ljubljana, Fac Med, Ljubljana, Slovenia
[3] Inst Oncol Ljubljana, Zaloska 2, Ljubljana 1000, Slovenia
[4] Addenbrookes Hosp, Dept Radiol, Cambridge, England
[5] Univ Cambridge, Cambridge, England
[6] Addenbrookes Hosp, CamPARI Clin, Cambridge, England