Abstract
In the endeavor to perform in vivo magnetic resonance imaging in very low fields, we developed a dedicated SQUID based NMR/MRI measurement system. The low noise performance of < 30 fT/\(\surd\)Hz above 1 Hz enables the measurement of nuclear magnetic precession at magnetic fields well below 50 μT down to 100 nT. The system is operated inside a heavily magnetically shielding - the Berlin Magnetically Shielded Room BMSR-2.
Each measurement starts with a prepolarization of the sample in a field of up to 5 mT. After this preparation, the free precession decay in the much weaker detection field is measured by the SQUID.
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© 2012 Springer-Verlag GmbH Berlin Heidelberg
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Hartwig, S. et al. (2012). Low Field Nuclear Magnetic Relaxation of Water and Brain Tissue. In: Buzug, T., Borgert, J. (eds) Magnetic Particle Imaging. Springer Proceedings in Physics, vol 140. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24133-8_62
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DOI: https://doi.org/10.1007/978-3-642-24133-8_62
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-24132-1
Online ISBN: 978-3-642-24133-8
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