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Clin Radiol. 2013 Feb;68(2):125-30. doi: 10.1016/j.crad.2012.05.017. Epub 2012 Aug 11.

Comprehensive MRA of the lower limbs including high-resolution extended-phase infra-inguinal imaging with gadobenate dimeglumine: initial experience with inter-individual comparison to the blood-pool contrast agent gadofosveset trisodium.

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  • 1Glasgow Royal Infirmary, Glasgow, UK. andychristie90@hotmail.com

Abstract

AIM:

To compare extended-phase imaging using an extracellular space contrast agent, gadobenate dimeglumine, to imaging with a blood-pool contrast agent, gadofosveset, for magnetic resonance angiography.

MATERIALS AND METHODS:

A lower-limb magnetic resonance angiography (MRA) protocol (dynamic crural, three-station bolus chase, and infra-inguinal high resolution) designed for blood-pool agent imaging was adapted for use with the extracellular agent, gadobenate dimeglumine, primarily by using a triphasic injection protocol. Ten patients scanned with gadofosveset were compared to 10 patients scanned with gadobenate. The dynamic, bolus chase, and high-resolution images were scored for quality on a Likert scale (from 1-5). Signal- and contrast-to-noise ratios were analysed, and Mann-Whitney U statistical analysis performed.

RESULTS:

There was no significant difference for the dynamic imaging or the aorto-iliac station of the bolus chase. Infra-inguinal bolus chase images were higher quality (p < 0.05 Mann-Whitney U test) with gadobenate. Signal analysis confirmed lower signal and contrast for venous imaging on the high spatial resolution acquisitions with gadobenate; however, this allowed improved arterial conspicuity.

CONCLUSION:

Extended-phase imaging using an extracellular space contrast agent is feasible and provides image quality to equal imaging with a blood-pool contrast agent.

Copyright © 2012 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.

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PMID:
22884130
[PubMed - indexed for MEDLINE]
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