Seitz, Johannes and Strotzer, Michael and Wild, Thomas and Nitz, Wolfgang R. and Voelk, Markus and Lenhart, Markus and Feuerbach, Stefan (2001) Quantification of blood flow in the carotid arteries - Comparison of Doppler ultrasound and three different phase-contrast magnetic resonance imaging sequences. INVESTIGATIVE RADIOLOGY, 36 (11). pp. 642-647. ISSN 0020-9996
Full text not available from this repository. (Request a copy)Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VELOCITY-MEASUREMENTS; MR-ANGIOGRAPHY; VARIABILITY; QUANTITATION; SONOGRAPHY; AGE; carotid artery; blood; flow dynamics; magnetic resonance; phase imaging; ultrasound; Doppler ultrasound |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Nov 2021 10:29 |
| Last Modified: | 30 Nov 2021 10:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40975 |
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