Fig. 3

Pre-transurethral resection ¹¹C-acetate PET/MRI (a, b, c) in a 75-year old male patient (number 3 in primary imaging) showing a heterogenous lobulated mass on the left side of mid-line without extension (white arrow) to perivesical fat on T2-weighted image (a) or an area of increased diffusion signal restriction (white arrow) extending beyond the bladder wall (b - b value 800 s/mm² trace diffusion weighted image). The lesion had increased ¹¹C-acetate uptake (c - PET fused with T2-weighted image, SUV is scaled from 0.0 to 3.2). The imaging findings were suggestive of T1 stage. The transurethral resection of bladder tumor specimen revealed stage T1, thus the findings of ¹¹C-acetate PET/MRI correctly staged the tumor