Steady-state equilibrium phase inversion recovery ON-resonant water suppression (IRON) MR angiography in conjunction with superparamagnetic nanoparticles. A robust technique for imaging within a wide range of contrast agent dosages
| Autor: | Hugo A. Katus, Evangelos Giannitsis, Grigorios Korosoglou, Jing Yu, T. Hilbel, Moritz Thomas, Matthias Stuber, Ingolf Arend, Gitsios Gitsioudis |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Dose Iron media_common.quotation_subject Contrast Media Aorta Thoracic Inversion recovery Superparamagnetic nanoparticles Ferric Compounds Article Magnetic resonance angiography Magnetics Equilibrium phase medicine Animals Contrast (vision) Radiology Nuclear Medicine and imaging Aorta Abdominal Particle Size Magnetite Nanoparticles media_common Observer Variation Models Statistical medicine.diagnostic_test business.industry Mr angiography Water Molecular Weight Glucose Alcohols cardiovascular system Rabbits Nuclear medicine business Magnetic Resonance Angiography Phase inversion circulatory and respiratory physiology |
| Zdroj: | Journal of Magnetic Resonance Imaging, vol. 38, no. 4, pp. 836-844 |
| Popis: | Purpose To investigate the ability of inversion recovery ON-resonant water suppression (IRON) in conjunction with P904 (superparamagnetic nanoparticles which consisting of a maghemite core coated with a low-molecular-weight amino-alcohol derivative of glucose) to perform steady-state equilibrium phase MR angiography (MRA) over a wide dose range. Materials and Methods Experiments were approved by the institutional animal care committee. Rabbits (n = 12) were imaged at baseline and serially after the administration of 10 incremental dosages of 0.57–5.7 mgFe/Kg P904. Conventional T1-weighted and IRON MRA were obtained on a clinical 1.5 Tesla (T) scanner to image the thoracic and abdominal aorta, and peripheral vessels. Contrast-to-noise ratios (CNR) and vessel sharpness were quantified. Results Using IRON MRA, CNR and vessel sharpness progressively increased with incremental dosages of the contrast agent P904, exhibiting constantly higher contrast values than T1-weighted MRA over a very wide range of contrast agent doses (CNR of 18.8 ± 5.6 for IRON versus 11.1 ± 2.8 for T1-weighted MRA at 1.71 mgFe/kg, P = 0.02 and 19.8 ± 5.9 for IRON versus −0.8 ± 1.4 for T1-weighted MRA at 3.99 mgFe/kg, P = 0.0002). Similar results were obtained for vessel sharpness in peripheral vessels, (Vessel sharpness of 46.76 ± 6.48% for IRON versus 33.20 ± 3.53% for T1-weighted MRA at 1.71 mgFe/Kg, P = 0.002, and of 48.66 ± 5.50% for IRON versus 19.00 ± 7.41% for T1-weighted MRA at 3.99 mgFe/Kg, P = 0.003). Conclusion Our study suggests that quantitative CNR and vessel sharpness after the injection of P904 are consistently higher for IRON MRA when compared with conventional T1-weighted MRA. These findings apply for a wide range of contrast agent dosages. J. Magn. Reson. Imaging 2013;38:836–844. © 2013 Wiley Periodicals, Inc. |
| Databáze: | OpenAIRE |
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