Flow chart of the study protocol. The trial consisted of two phases: in phase 1 accuracy of 11 C-acetate PET/MRI was evaluated on 15 treatment naive patients before any intervention of primary tumor. In phase 2 treatment response to Neoadjuvant chemotherapy (NAC) was evaluated in 5 patients undergoing 11 C-acetate PET/MRI after transurethral resection of bladder tumor (TUR-BT) and neoadjuvant chemotherapy. 2 patients participated in both phases of the study. In total, 18 patients were enrolled
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