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Hyperpolarized F-19-MRI: parahydrogen-induced polarization and field variation enable F-19-MRI at low spin density

Bommerich, U. and Trantzschel, T. and Mulla-Osman, S. and Buntkowsky, G. and Bargon, J. and Bernarding, J. (2010):
Hyperpolarized F-19-MRI: parahydrogen-induced polarization and field variation enable F-19-MRI at low spin density.
12, In: Physical Chemistry Chemical Physics, (35), pp. 10309-10312, [Online-Edition: http://apps.webofknowledge.com/full_record.do?product=WOS&se...],
[Article]

Abstract

The use of parahydrogen-induced polarization (PHIP) for signal enhancement in nuclear magnetic resonance spectroscopy (NMR) is well established. Recently, this method has been adopted to increase the sensitivity of magnetic resonance imaging (MRI). The transfer of non-thermal spin hyperpolarization-from parahydrogen to a heteronucleus-provides better contrast, thus enabling new imaging agents. The unique advantage of F-19-MRI is that it provides non-invasive and background-free active marker signals in biomedical applications, such as monitoring drugs that contain F-19. In former NMR spectroscopic experiments, hyperpolarized F-19 nuclei were efficiently generated by using low magnetic field (Earth's field) conditions. In order to apply the method to F-19-hyperpolarized MRI, we chose an exploratory target molecule, for which a successful transfer of PHIP had already been attested. The transfer of hyperpolarization to F-19 was further optimized by adequate field manipulations below Earth's magnetic field. This technique, called field cycling, led to a signal enhancement of about 60. For the first time, hyperpolarized F-19-MR images were received. Despite the low spin density of the sample (0.045 of the H-1 density in H2O), a sufficient signal-to-noise was obtained within a short acquisition time of 3.2 s.

Item Type: Article
Erschienen: 2010
Creators: Bommerich, U. and Trantzschel, T. and Mulla-Osman, S. and Buntkowsky, G. and Bargon, J. and Bernarding, J.
Title: Hyperpolarized F-19-MRI: parahydrogen-induced polarization and field variation enable F-19-MRI at low spin density
Language: English
Abstract:

The use of parahydrogen-induced polarization (PHIP) for signal enhancement in nuclear magnetic resonance spectroscopy (NMR) is well established. Recently, this method has been adopted to increase the sensitivity of magnetic resonance imaging (MRI). The transfer of non-thermal spin hyperpolarization-from parahydrogen to a heteronucleus-provides better contrast, thus enabling new imaging agents. The unique advantage of F-19-MRI is that it provides non-invasive and background-free active marker signals in biomedical applications, such as monitoring drugs that contain F-19. In former NMR spectroscopic experiments, hyperpolarized F-19 nuclei were efficiently generated by using low magnetic field (Earth's field) conditions. In order to apply the method to F-19-hyperpolarized MRI, we chose an exploratory target molecule, for which a successful transfer of PHIP had already been attested. The transfer of hyperpolarization to F-19 was further optimized by adequate field manipulations below Earth's magnetic field. This technique, called field cycling, led to a signal enhancement of about 60. For the first time, hyperpolarized F-19-MR images were received. Despite the low spin density of the sample (0.045 of the H-1 density in H2O), a sufficient signal-to-noise was obtained within a short acquisition time of 3.2 s.

Journal or Publication Title: Physical Chemistry Chemical Physics
Volume: 12
Number: 35
Uncontrolled Keywords: magnetic-resonance c-13 hydrogen order mri
Divisions: 07 Department of Chemistry
07 Department of Chemistry > Physical Chemistry
Date Deposited: 27 Oct 2014 20:36
Official URL: http://apps.webofknowledge.com/full_record.do?product=WOS&se...
Additional Information:

644DM Times Cited:25 Cited References Count:24

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