Exchange-induced relaxation in the presence of a fictitious field

Dennis J. Sorce, Silvia Mangia, Timo Liimatainen, Michael Garwood, Shalom Michaeli

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the present study we derive a solution for two site fast exchange-induced relaxation in the presence of a fictitious magnetic field as generated by amplitude and frequency modulated RF pulses. This solution provides a means to analyze data obtained from relaxation experiments with the method called RAFFn (Relaxation Along a Fictitious Field of rank n), in which a fictitious field is created in a coordinate frame undergoing multi-fold rotation about n axes (rank n). The RAFF2 technique is relevant to MRI relaxation methods that provide good contrast enhancement for tumor detection. The relaxation equations for n = 2 are derived for the fast exchange regime using density matrix formalism. The method of derivation can be further extended to obtain solutions for n > 2.

Original languageEnglish (US)
Pages (from-to)12-16
Number of pages5
JournalJournal of Magnetic Resonance
Volume245
DOIs
StatePublished - Jan 1 2014

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Magnetic Fields
Magnetic resonance imaging
Tumors
Ion exchange
tumors
derivation
Magnetic fields
formalism
augmentation
pulses
magnetic fields
Neoplasms
Experiments

Keywords

  • Exchange
  • Fictitious fields
  • High rotating frames
  • Relaxations

Cite this

Exchange-induced relaxation in the presence of a fictitious field. / Sorce, Dennis J.; Mangia, Silvia; Liimatainen, Timo; Garwood, Michael; Michaeli, Shalom.

In: Journal of Magnetic Resonance, Vol. 245, 01.01.2014, p. 12-16.

Research output: Contribution to journalArticle

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