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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
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