Apparatus for producing ultrasonic waves for medical application; handpieces for connection to the handheld scanners; ultrasound scanners, in particular ultrasound scanners for scanning the urinary system; ultrasound scanners for scanning the bladder; ultrasound scanners for monitoring the bladder and the pelvic floor; apparatuses and devices for measuring the volume of urine released from the body, the speed with which it is released, and how long the release takes; apparatuses and devices f...