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Multislice dark-blood carotid artery wall imaging: A 1.5 T and 3.0 T comparison

✍ Scribed by Ioannis Koktzoglou; Yiu-Cho Chung; Venkatesh Mani; Timothy J. Carroll; Mark D. Morasch; Gabor Mizsei; Orlando P. Simonetti; Zahi A. Fayad; Debiao Li

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
368 KB
Volume
23
Category
Article
ISSN
1053-1807

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✦ Synopsis

Abstract

Purpose

To compare two multislice turbo spin‐echo (TSE) carotid artery wall imaging techniques at 1.5 T and 3.0 T, and to investigate the feasibility of higher spatial resolution carotid artery wall imaging at 3.0 T.

Materials and Methods

Multislice proton density‐weighted (PDW), T2‐weighted (T2W), and T1‐weighted (T1W) inflow/outflow saturation band (IOSB) and rapid extended coverage double inversion‐recovery (REX‐DIR) TSE carotid artery wall imaging was performed on six healthy volunteers at 1.5 T and 3.0 T using time‐, coverage‐, and spatial resolution–matched (0.47 × 0.47 × 3 mm^3^) imaging protocols. To investigate whether improved signal‐to‐noise ratio (SNR) at 3.0 T could allow for improved spatial resolution, higher spatial resolution imaging (0.31 × 0.31 × 3 mm^3^) was performed at 3.0 T. Carotid artery wall SNR, carotid lumen SNR, and wall‐lumen contrast‐to‐noise ratio (CNR) were measured.

Results

Signal gain at 3.0 T relative to 1.5 T was observed for carotid artery wall SNR (223%) and wall‐lumen CNR (255%) in all acquisitions (P < 0.025). IOSB and REX‐DIR images were found to have different levels of SNR and CNR (P < 0.05) with IOSB values observed to be larger. Normalized to a common imaging time, the higher spatial resolution imaging at 3.0 T and the lower spatial resolution imaging at 1.5 T provided similar levels of wall‐lumen CNR (P = NS).

Conclusion

Multislice carotid wall imaging at 3.0 T with IOSB and REX‐DIR benefits from improved SNR and CNR relative to 1.5 T, and allows for higher spatial resolution carotid artery wall imaging. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.

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