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Erschienen in: European Radiology 12/2007

01.12.2007 | Magnetic Resonance

MR angiography with blood pool contrast agents

verfasst von: Jens Bremerich, Deniz Bilecen, Peter Reimer

Erschienen in: European Radiology | Ausgabe 12/2007

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Abstract

Contrast-enhanced magnetic resonance angiography (CE-MRA) with standard extracellular contrast material is well established for vascular imaging. Recently, the first blood pool contrast agent (BPA) has become clinically available. This paper reviews characteristics and classification of BPA as well as first clinical experience in various vascular territories. BPAs comprise gadolinium-based compounds, synthetic compounds, and ultrasmall superparamagnetic iron-oxide (USPIO) particles. Such BPAs are retained in blood with a prolonged time-window of enhancement as compared to extracellular gadolinium chelates. Promising results from USPIO at first-pass and steady-state angiography have been published, but no USPIO is approved yet. Gadofosveset is the first clinically approved BPA. After bolus injection, gadofosveset binds noncovalently to serum-albumine, thus enhancing relaxivity. First published results from carotid, coronary, renal, and peripheral angiography are encouraging; particularly helpful is prolonged enhancement during steady state. More BPAs have been clinically evaluated, but no approval has been granted. Bolus-injectable BPAs allow for first-pass CE-MRA similar to standard extracellular contrast media, but with higher relaxivity, allowing lower doses and reduced injection rates. An additional feature of BPA is the steady-state phase with a broad time window enabling high-resolution angiography or double-gated angiography of coronary arteries to compensate for the complex motion pattern.
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Metadaten
Titel
MR angiography with blood pool contrast agents
verfasst von
Jens Bremerich
Deniz Bilecen
Peter Reimer
Publikationsdatum
01.12.2007
Verlag
Springer-Verlag
Erschienen in
European Radiology / Ausgabe 12/2007
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-007-0712-0

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