Fig. 1.

FCH PET/CT of recurrent prostate cancer after interstitial brachytherapy. a Axial PET image through the pelvis demonstrates focal increased activity in the prostatic region (arrow). b The corresponding CT image reveals the presence of brachytherapy implants in the prostate without other significant structural abnormality. c On PET/CT, images through the prostatic region localize to the area of increased FCH uptake to the left seminal vesicle and basal prostate (arrow). A subsequent biopsy of the left prostatic base confirms the presence of recurrent prostate cancer