The Use of Ultrasound in Assessing Post-prostatectomy Erectile Dysfunction

Inclusion criteria include: * Age \> 40 years * Clinically localized prostate cancer (American Urological Association Grade Groups 1-2; cT1c or cT2a-b; PSA \< 10) without clinic or imaging evidence of localized extra-prostatic or metastatic disease (i.e. AUA low and favorable intermediate risk prostate cancer) * International Index of Erectile Function (IIEF) of ≥ 21 points at baseline (no or mild erectile dysfunction) * Patient-expressed interest in consultation for sexual function (erectile function) preservation/ optimization * Planned bilateral nerves-paring prostatectomy Exclusion criteria include: * Moderate or severe ED based in IIEF criteria (score \< 21) * History of prior pelvic or penile surgery * Current or prior androgen deprivation therapy * Planned non-nerve sparing prostatectomy