Quantification of Blood Flow in the Carotid Arteries: Comparison of Doppler Ultrasound and Three Different Phase-Contrast Magnetic Resonance Imaging Sequences

• Published in: Investigative radiology Vol. 36; no. 11; pp. 642 - 647
• Main Authors: SEITZ, JOHANNES, STROTZER, MICHAEL, WILD, THOMAS, NITZ, WOLFGANG R, VÖLK, MARKUS, LENHART, MARKUS, FEUERBACH, STEFAN
• Format: Journal Article
• Language: English
• Published: United States Lippincott Williams & Wilkins, Inc 01-11-2001
• Subjects: Adult; Blood Flow Velocity; Carotid Artery, Common - diagnostic imaging; Carotid Artery, Common - physiology; Humans; Linear Models; Magnetic Resonance Imaging - methods; Male; Reference Values; Ultrasonography, Doppler
• ISSN: 0020-9996; 1536-0210
• DOI: 10.1097/00004424-200111000-00003

Seitz J, Strotzer M, Wild T, et al. Quantification of blood flow in the carotid arteriesComparison of Doppler ultrasound and three different phase-contrast magnetic resonance imaging sequences. Invest Radiol 2001;36:642-647.
RATIONALE AND OBJECTIVES. To compare blood flow velocities in the carotid arteries measured with three different magnetic resonance (MR) phase-contrast imaging techniques and with percutaneous Doppler ultrasound.
METHODS.Fourteen healthy male volunteers with a mean age of 33 ± 3.8 years were studied. Ultrasound and MR phase velocity mapping of both common carotid arteries (n = 28) was performed within 5 hours. A two-dimensional fast low-angle shot sequence with retrospective cardiac gating, a sequence with prospective cardiac triggering, and a breath-hold sequence with prospective cardiac triggering were used. Resistance indexes and pulsatility indexes were calculated for all modalities.
RESULTS.The comparison of flow velocities obtained with ultrasound and the different MR techniques led to a moderate correlation of the retrospective gated and prospective triggered MR techniques (eg, r = 0.73 for maximum systolic velocity). The worst correlation was found between the breath-hold technique and retrospective cardiac gating (eg, r = 0.004 for pulsatility index). There was a weak correlation of all three MR sequences compared with ultrasound (r = 0.19–0.60)
CONCLUSIONS.A moderate correlation was found between velocities and indexes measured with the prospective cardiac-triggered phase-contrast MR technique and the retrospective cardiac-gated phase-contrast MR technique. A weak correlation was found between the three different MR techniques and ultrasound, as well as between the breath-hold prospective cardiac-triggered MR sequence and both of the other MR sequences. The influence of temporal and spatial resolution on MR phase-contrast velocity mapping was confirmed.