Voiding Urethrocystography by Means of 70-mm Image-Intensifier Fluorography

Voiding urethrocystography is an important tool in the evaluation of urinary tract disorders. The examination is usually performed with serial radiography, conventional spot-filming, or cinefluorography, each of these methods having some advantages and some disadvantages. Serial Radiography (7, 11, 15): Morphology is well demonstrated and some information is obtained about the mechanics of voiding, but once filming starts, the act of voiding cannot be observed fluoroscopically. In small bladders with rapid emptying, the urethra may be incompletely demonstrated; unnecessary exposures may be made after the bladder has emptied or after micturition has stopped. A transient ureteral reflux may not be well shown, and the positioning of the patient cannot be readjusted for optimal demonstration of normal or pathologic anatomy. Conventional Spot-Filming under Fluoroscopic Control (3, 4, 16 et al.): The number of films which can be obtained during micturition is limited in most cases to 4 or 8 since the change of ...