[Voiding urethrosonography. An alternative to roentgen urethrography].

X-ray contrast imaging of the urethra, retrograde as urethrogram (UG) or antegrade as part of the miction cystourethrogram (MCU), has proved successful as a standard examination in urological diagnosis. The article presents a sonography technique enabling three-dimensional morphological and functional imaging the entire male urethra by real-time sonography. Advantages over x-ray film methods are the repeatability at any time, low invasiveness, absence of exposure to x-rays, and lesions of the urethral mucosa by catheters, as well as the avoidance of iodine-induced contrast medium reactions. Miction urethrosonography (MUS) is suitable for screening diagnosis of urethral stricture in miction difficulties, for excluding an iatrogenic of congenital urethral diverticulum, and for control after urethral surgery (internal urethrotomy, urethroplasty).