RecruitingDiagnostic testThe Use of Ultrasound in Assessing Post-prostatectomy Erectile DysfunctionResearchers are trying to determine whether there is additional utility to using vibroelastography, a noninvasive ultrasound technique to evaluate for the presence of tissue fibrosis, in conjunction with standard penile duplex Doppler ultrasound to assess erectile function (recovery) after prostate cancer surgery.