Also known as "sonogram", is a painless procedure using reflected sound waves to produce images of the organs. In urology, it can be used for bladder, kidney, prostate, scrotum and testicular ultrasound scanning.
A water-based gel is spread on the skin over the part to be examined, to help transmit the sound waves. A hand-held transducer moves over the part to produce images for size, position and check for bladder draining. It may also be used to check for blockages, stones or tumours.
No fasting or bowel preparation is needed for this procedure.