A<unk> hy is a routine radiologic procedure (most typically in males) used to image the integrity of the urethra. Hence a<unk>  is essential for diagnosis of urethral injury, or urethral stricture.
Retrograde urethrogram
Cystography
Voiding cystourethrography
Cystometry
Computed tomography urography
Cystoscopy
Suprapubic aspiration
Urinary cast