Transcranial doppler sonography

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Transcranial Doppler sonography (TCD) was first introduced by Rune Aaslid and colleagues in 1982 to non-invasively measure blood flow velocities in the major branches of the Circle of Willis through the intact skull.1 A 2-MHz frequency pulse wave ultrasonic beam penetrates the skull and allows returned echo signals to be detected. The frequency shift of the returned echoes is calculated using the Doppler equation fD = 2 fo v cosθ/(c - cosθ), where fD is Doppler shift, fo is the emitting frequency, v is the scatterer speed, θ is the Doppler angle, and c is the sound propagation speed. The average speed of sound in soft tissues is 1540 m/s and the Doppler angle for TCD examination is assumed to be 0° for all arteries (cos 0° = 1). Therefore the Doppler equation is rearranged to calculate the velocity of moving blood in basal cerebral arteries: v(cm/s) = 77 fD (kHz)/fo (MHz), where the 77 coefficient is valid for frequency and velocity units shown in parentheses.

Original languageEnglish (US)
Title of host publicationNoninvasive Vascular Diagnosis
Subtitle of host publicationA Practical Guide to Therapy: Second Edition
PublisherSpringer London
Pages103-126
Number of pages24
ISBN (Print)1846284465, 9781846284465
DOIs
StatePublished - Dec 1 2007

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Doppler Transcranial Ultrasonography
Doppler Effect
Circle of Willis
Cerebral Arteries
Blood Flow Velocity
Skull
Pulse
Arteries
Ultrasonic Waves

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

Ribo, M., & Alexandrov, A. (2007). Transcranial doppler sonography. In Noninvasive Vascular Diagnosis: A Practical Guide to Therapy: Second Edition (pp. 103-126). Springer London. https://doi.org/10.1007/978-1-84628-450-2_9

Transcranial doppler sonography. / Ribo, Marc; Alexandrov, Andrei.

Noninvasive Vascular Diagnosis: A Practical Guide to Therapy: Second Edition. Springer London, 2007. p. 103-126.

Research output: Chapter in Book/Report/Conference proceedingChapter

Ribo, M & Alexandrov, A 2007, Transcranial doppler sonography. in Noninvasive Vascular Diagnosis: A Practical Guide to Therapy: Second Edition. Springer London, pp. 103-126. https://doi.org/10.1007/978-1-84628-450-2_9
Ribo M, Alexandrov A. Transcranial doppler sonography. In Noninvasive Vascular Diagnosis: A Practical Guide to Therapy: Second Edition. Springer London. 2007. p. 103-126 https://doi.org/10.1007/978-1-84628-450-2_9
Ribo, Marc ; Alexandrov, Andrei. / Transcranial doppler sonography. Noninvasive Vascular Diagnosis: A Practical Guide to Therapy: Second Edition. Springer London, 2007. pp. 103-126
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