Transcranial Doppler
Transcranial Doppler is a noninvasive ultrasound test used to measure blood flow in the major blood vessels of the brain. It can help your neurologist evaluate circulation, detect abnormalities in blood flow, and monitor certain neurological or vascular conditions.
At Hackensack Neurology, transcranial Doppler testing is used as part of a thoughtful diagnostic approach to conditions that may affect the brain’s blood supply.
What Is a Transcranial Doppler?
Transcranial Doppler, sometimes called TCD, uses sound waves to assess blood flow through the arteries inside the skull. The test provides important information about how blood is moving through the brain’s circulation.
Why a Transcranial Doppler May Be Recommended
- Evaluation of stroke risk or abnormal brain blood flow
- Assessment of intracranial vascular conditions
- Monitoring after certain neurological events or procedures
- Evaluation of suspected vasospasm or emboli in select cases
- Further investigation of symptoms related to cerebrovascular disease
What to Expect During the Test
During a transcranial Doppler study, a small ultrasound probe is placed against specific areas of the head to measure blood flow through targeted arteries. The test is noninvasive and does not involve needles, radiation, or sedation.
What the Results Can Show
- Changes in blood flow velocity
- Narrowing or other abnormalities in intracranial vessels
- Evidence of impaired circulation
- Information that may guide additional testing or treatment
Why This Test Matters
Because the brain depends on a healthy, consistent blood supply, identifying circulation problems early can be important. Transcranial Doppler offers valuable information that may support diagnosis, treatment planning, and monitoring over time.
Schedule an Evaluation
If your provider has recommended transcranial Doppler testing, Hackensack Neurology offers advanced neurological diagnostics with a focus on accuracy, clarity, and patient-centered care.

