Ultrasound or sonography involves sending sound waves into the body. These sound waves reflect off the internal organs and are recorded by special instruments that create images of anatomic parts. No ionizing radiation (x-ray) is involved in ultrasound imaging. Ultrasound images are captured in real time so they can show movement of internal tissues and organs, such as the flow of blood in arteries and veins.
Prostate ultrasound is used to detect possible disorders within a man's prostate gland. Ultrasound images can indicate when the prostate is enlarged or when there is an abnormal growth that might be cancer.