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Off-Resonance Rotating Frame Spin—Lattice Relaxation

Theory, and in Vivo MRS and MRI Applications

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In Vivo Spectroscopy

Part of the book series: Biological Magnetic Resonance ((BIMR,volume 11))

Abstract

The off-resonance rotating frame spin-lattice relaxation experiment represents a class of magnetic resonance techniques in which a low-power, continuous-wave radiofrequency (RF) field is applied off-resonance from a selected resonance. Application of such an irradiation field establishes nuclear spin polarization along an effective field inclined at an angle Θ away from the z axis of the rotating frame. In its original form, this approach was employed for the determination of the rotational correlation time, i.e., the rotational diffusion characteristics of a reorienting macromolecule (James et al., 1978; Schleich et al., 1989). More generally, the off-resonance rotating frame spin-lattice relaxation experiment can be thought of as a form of off-resonance saturation, in which a selected resonance is either completely or partially saturated. Viewed in these terms, the off-resonance rotating frame spin-lattice relaxation formalism, modified to include magnetization transfer phenomena, may be used to obtain chemical exchange kinetic and magnetic cross-relaxation information.

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© 1992 Springer Science+Business Media New York

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Schleich, T., Caines, G.H., Rydzewski, J.M. (1992). Off-Resonance Rotating Frame Spin—Lattice Relaxation. In: Berliner, L.J., Reuben, J. (eds) In Vivo Spectroscopy. Biological Magnetic Resonance, vol 11. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9477-9_2

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  • DOI: https://doi.org/10.1007/978-1-4757-9477-9_2

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4757-9479-3

  • Online ISBN: 978-1-4757-9477-9

  • eBook Packages: Springer Book Archive

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