Effects of radiation damping on Z-spectra

DC Williamson, J Narvainen, PL Hubbard, Risto Kauppinen, GA Morris

Research output: Contribution to journalArticle

13 Citations (Scopus)


Radiation damping induced by the strong water magnetization in Z-spectroscopy experiments can be sufficient to perturb significantly the resultant Z-spectrum. With a probe tuned to exact electrical resonance the effects are relatively straightforward, narrowing the central feature of the Z-spectrum. Where, as is commonly the case, the probe is tuned sufficiently well to give optimum signal-to-noise ratio and radiofrequency field strength but is not at exact resonance, radiation damping introduces an unexpected asymmetry into the Z-spectrum. This has the potential to complicate the use of Z-spectrum asymmetry to study chemical exchange, for example in the estimation of pH in vivo. (c) 2006 Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)203-212
Number of pages10
JournalJournal of Magnetic Resonance
Issue number2
Publication statusPublished - 1 Dec 2006


  • chemical exchange
  • radiation damping
  • magnetization transfer
  • probe tuning
  • Z-spectroscopy


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