43 results found
Medical tests
… same day or the next day. There are several types of brain waves. Alpha waves are present only when you're awake with your eyes closed but you are mentally alert. Alpha waves go away when your eyes are open or you are …
Medical tests
… A VER test can find problems by showing how brain waves respond to certain things you look at during the test. … response (VER) A computer records changes in your brain waves while you look at patterns. Electrical signals are … visual field. A computer records the response of your brain waves. The test measures the time of response (latency) and …
Medical tests
… Overview A Doppler ultrasound test uses reflected sound waves to see how blood flows through a blood vessel. It … device is called a transducer. It sends and receives sound waves that are amplified through a microphone. The sound waves bounce off solid objects, including blood cells. The …
Medical tests
… Information Test Overview A breast ultrasound uses sound waves to make a picture of the tissues inside the breast. A … back and forth over the breast. A computer turns the sound waves into a picture on a TV screen. The picture is called a … put on your breast so the transducer can pick up the sound waves as it is moved back and forth over the breast. A …
Medical tests
… Overview An echocardiogram (also called an echo) uses sound waves to make an image of your heart. A device called a … It looks like a microphone. The transducer sends sound waves that echo off your heart and back to the transducer. … on the left side of your chest to help pick up the sound waves. The transducer will be pressed firmly against your …
Medical tests
… is a type of ultrasound test that uses high-pitched sound waves that are sent through a device called a transducer. The device picks up echoes of the sound waves as they bounce off the different parts of your heart. … the lungs and bones of the chest wall don't block the sound waves produced by the probe. A sedative and an anesthetic …
Medical tests
… An ultrasound is a type of imaging test that uses sound waves. It takes pictures of the organs and other structures … over the area being looked at. The device sends the sound waves to a computer, which turns them into a picture. This … office. Gel is applied to the skin to help the sound waves pass through. The transducer will be pressed against …
Medical tests
… Overview An echocardiogram (also called an echo) uses sound waves to make an image of your heart. A device called a transducer sends sound waves that echo off your heart and back to the transducer. … rubbed on the side of your chest to help pick up the sound waves. The transducer will be pressed firmly against your …
Medical tests
… ultrasound (sonogram) is a test that uses reflected sound waves to show a picture of the testicles and scrotum . The … back and forth over the scrotum. The device sends the sound waves to the computer, which turns them into a picture. This … be somewhat painful. You will not hear or feel the sound waves. Risks There are no known risks from having this test. …
Medical tests
… hear start as vibrations in our environment that make sound waves, which vibrate at a certain speed (frequency) and have … the sound is (volume). Hearing happens when these sound waves travel through the ear and are turned into nerve … impulses are sent to the brain, which "hears" them. Sound waves enter the ear through the ear canal (external ear). …
