Female reproductive organs. Coloured 3-D ultrasound scan of the pelvic region of a female patient. The uterus (womb) is at upper left. One of the woman's two ovaries is seen at far left. The ovaries are linked to the uterus by oviducts (Fallopian tubes, one at upper right). Ultrasound scanning is a diagnostic technique that sends high-frequency sound waves into the body via a transducer. The returning echoes are used to build an image of internal structures. 3-D scanning uses computer technology to return more detailed images than conventional 2-D scans.