Study of Urethral Mobility in Male Stress Urinary Incontinence Pre- and Post- Placement of Transobturator Sling

Inclusion Criteria: * The control group: * normal male subjects * The Intervention group: * male * with stress urinary incontinence * 45 years or older * history of prior radical prostatectomy * complains of stress urinary incontinence * scheduled for a transobturator sling surgery * ability and willingness to provide written consent Exclusion Criteria: * absolute or relative contraindications to MRI * claustrophobia * inability to undergo the male sling surgery * PI judgement Absolute contraindications to MRI: * electronically, magnetically, and mechanically activated implants * ferromagnetic or electronically operated active devices * metallic splinters in the eye * ferromagnetic hemostatic clips in the central nervous system Relative contraindications to MRI: * cochlear implants * other pacemakers * nerve stimulators * lead wires or similar wires * prosthetic heart valves * hemostatic clips * non-ferromagnetic stapedial implants