Transcranial Doppler (TCD) is a test that uses sound waves to study the blood flow in your brain. The sound waves bounce off blood cells, sending information to a computer for analysis. This test may help to determine possible causes of stroke, for example, an abnormal connection between your arteries and veins.
How should I prepare for the test?
What will happen during the test?
The test is done by a doctor and a sonographer and takes up to 30 minutes.
Figure 1. A headset is fitted. Image for illustration purposes only
Figure 2. A salt solution is injected.Image for illustration purposes only.
Frequently Asked Questions
What happens after the procedure?
Is the test safe?
1Romero et al. Cerebral Ischemic Events Associated With ‘Bubble Study’ for Identification of Right to Left Shunts. Stroke. 2009;40:2343-2348.
Can I undergo the test if I am feeling unwell?
No. If you are feeling unwell e.g. fever, cough, do not proceed with the test. Call to reschedule your appointment.
Have questions or concerns? Call:
Tel: 6330 6363
Office Hours:8.00am – 5.30pm, Mon – Wed, Fri8.00am – 5.00pm, ThursClosed on Sat, Sun, Public Holidays
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The information is correct as of July 2021 and subject to revisions without notice.
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