What is ultrasound scanning?

Ultrasound scanning is a procedure that uses high frequency sound waves and their echoes to create a picture of the internal organs, especially soft tissue that does not show up well on x-ray images. Ultrasound scanning works similarly to sonar systems used by ships.

When is it used?

It is used to diagnose diseases or examine an unborn baby during pregnancy. In addition, it is useful in examining the heart at work since it can show the opening and closing of the valves.

How do I prepare for ultrasound scanning?

In general, you don't need to do anything special to prepare for the procedure. Some specific tests, such as an ultrasound of the uterus, require a full bladder. If preparations are necessary, your doctor or the lab technician will give you instructions.

What happens during the procedure?

High frequency waves pass through the body from a device called a transducer placed on part of the body. A liquid- jelly is usually applied to the skin to improve the contact between your body and the transducer. The transducer is connected at the other end to a computer with a display screen. As the sound waves pass through the body, they are reflected by the body organ and create echoes. The computer converts these echoes into an image of the body organ.

A special ultrasound, called Doppler ultrasound, is used to check movement in organs such as blood flowing through blood vessels.

What are the benefits of this procedure?

Ultrasound scanning helps the doctor to see some of the inside of your body, which helps him or her to diagnose your problem. Ultrasound waves are considered very safe.