Vessel Window Depth Mean Velocity

Arteria Cerebri Media (MCA) Temporal window 30-60 mm 55 +/- 12 cm / sec

Arteria Cerebri Anterior (ACA) Temporal window 60-80 mm 50 +/- 11 cm / sec

Arteria Cerebri Posterior (PCA) Temporal window 60-70 mm 39 +/- 10 cm / sec

60-70 mm 40 +/- 10 cm / sec

Arteria Basilaris (BA) Occipital window 80-120 mm 41 +/- 10 cm / sec

Arteria Vertebralis (VA) Occipital window 60-90 mm 38 +/- 10 cm / sec

Arteria Ophthalmica (OA) Orbital window 40-60 mm 21 +/- 5 cm / sec

Doppler Sonography

Stenosis Range ICA PSV ICA/CCA PSV Ratio

ICA EDV Plaque

Normal < 125 cm/s < 2.0 < 40 cm/s None< 50 % < 125 cm/s < 2.0 < 40 cm/s > 50 % diameter reduction50 % - 69 % 125 - 230 cm/s 2.0 - 4.0 40 - 100 cm/s ≥ 50 % diameter reduction70 % - near occlusion > 230 cm/s > 4.0 > 100 cm/s ≥ 50 % diameter reduction

Near occlusion May be low or undetectable Variable Variable Significant, detectable lumen

Occlusion Undetectable N/A N/A Significant, no detectable lumen

Transcranial Normal Adult Values

Ultrasound Consensus Criteria for Carotid Stenosis

© 2017 Compumedics Germany GmbH · www.dwl.de

Transcranial Doppler Sonography Circle of Willis & Acoustic Windows

© 2017 Compumedics Germany GmbH · www.dwl.de

ACoAArteria Communicans Anterior

PCoAArteria Communicans Posterior

PCoAArteria Communicans Posterior

PCA Arteria Cerebri Posterior PCA

Arteria Cerebri Posterior

MCA Arteria Cerebri Media

OA Arteria Ophthalmica

OA Arteria Ophthalmica

MCA Arteria Cerebri Media

A1

P2P1

A2

VAArteria Vertebralis

VAArteria Vertebralis

BA Arteria Basilaris

ACAArteria Cerebri Anterior

ACAArteria Cerebri Anterior

Rev1

01/

2017

Orbital Acoustic Window

Temporal Acoustic Window

Occipital Acoustic Window