Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Transcranial Doppler Ultrasonography

  • Elliot J. RothEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_2207

Synonyms

TCD

Definition

Transcranial Doppler ultrasonography (TCD) is a test that measures the speed of blood flow through the cerebral blood vessels. It can be used to support, establish, or confirm diagnoses of cerebral embolism, carotid artery stenosis (blockage), cerebral vasospasm, and subarachnoid hemorrhage.

Current Knowledge

TCD is usually used with other imaging tests (e.g., MRI, MRA, and CT) to confirm diagnoses. It is noninvasive, involving no radiation or injection of foreign substances, relatively inexpensive, and easy to perform. It can be done using a portable machine and can be completed in a relatively short time frame. The ultrasound probe sends high-pitched inaudible and invisible sound waves into the body, which “bounce” off of the tissues in varying patterns. The timing, amount, and pattern of the returning sound waves are recorded by the sensor in the probe, and the appearance of these returning sound waves reflects various changes in the tissues. When an image is...

This is a preview of subscription content, log in to check access.

References and Readings

  1. Sloan, M. A., et al. (2004). Assessment: Transcranial Doppler ultrasonography: Report of the therapeutics and technology assessment subcommittee of the American academy of neurology. Neurology, 62, 1468–1481.CrossRefPubMedPubMedCentralGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physical Medicine and RehabilitationNorthwestern University, Feinberg School of MedicineChicagoUSA