Bladder cancer growth in UPII-SV40T transgenic male mice. Animals were anesthetized, injected with radiopaque agent via tail-vein, and submitted to FPDCT scanning for a total of 3 longitudinal sessions. Data sets were analyzed with Amira and NIH ImageJ to identify tumors and quantify tumor volumes. Tumor volumes for intact (n = 9), castrate (n = 8), castrate + DHT (n = 6) are indicated. Values are mean ± SE. p = 0.0071*, p = 0.0233** vs. castrate (one-way ANOVA, JMP 6.0.3, SAS Institute, Inc.).