An ultrasound imaging transducer assembly specifically designed to be positioned within the bladder either manually or under endoscopic guidance. Included is a variety of single or multiple element transducer assembly configurations that convert electric voltages into an ultrasound beam. It steers, focuses, and detects the ultrasound beam and resulting echoes either mechanically or electronically. Also referred to as a bladder, or urethra probe, it may incorporate a biopsy needle guidance channel as part of the transducer casing or housing assembly design. This is a reusable device.