“…While ultrasonography of the upper urinary tract and the bladder is a well-established imaging procedure in urology [2,3,5,10], ultrasound of micturition is rather infrequently applied and investigated [6,7,9, 11], In spired from the results of Shapiro et al [11], we started to use ultrasound also for imaging the micturition pro cess. After a certain learning period, we have been using this method almost exclusively to study the functional as well as morphological status of the bladder and bladder outlet as far as the membranous urethra.…”