Cerebrovascular Ultrasound studies

Your physician has recommended that you have a Transcranial Doppler (TCD) and/or Carotid Duplex study.

What are these tests?

TCD and Carotid Duplex studies are non-invasive ultrasound methods used to examine the blood circulation of the arteries in your head and neck that supply oxygenated blood to your eyes and brain. Sound waves inaudible to humans reflect off blood cells moving within the vessels, allowing your doctor to visualize narrowing or occlusion of those vessels. These ultrasound images can help your doctor identify a wide range of conditions affecting blood flow to and within the brain.


There is NO special preparation for a Transcranial Doppler (TCD) and/or Carotid Duplex study other than no facial makeup around the side of the face or temple area. You will not need to remove any clothing or do any other preparation.

During the test:

The examination takes approximately 60-90 minutes to perform and is done by a specially trained sonographer who will apply some gel to areas to be examined while you are on an exam table. A small device called a transducer is held in place on the skin’s surface while the blood flow information is being recorded. You will be asked to hold your breath for brief periods during the test. During the study, please try not to talk or move to minimize distortion of the images. There is no discomfort or pain during or after the examination.

The results should be available to your physician within 7 days from the date of the test.