Optimization of Offset Frequency in the SORC Pulse Sequence Using Feedback

The low signal-to-noise ratio (SNR) of nuclear quadrupolar resonance measurements has motivated research on signal enhancement methods, including multipulse sequences that facilitate signal averaging, the development of interlaced pulse sequences, and super-Q coils. More recently, it has been shown...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 1999-07, Vol.139 (1), p.139-151
Main Authors: Blauch, A.J., Schiano, J.L., Ginsberg, M.D.
Format: Article
Language:English
Subjects:
feedback control
gradient tuning
Magnetic Resonance Spectroscopy - methods
nuclear quadrupole resonance
pulse parameter optimization
Sodium Nitrite - chemistry
strong off-resonant comb sequence
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Summary:The low signal-to-noise ratio (SNR) of nuclear quadrupolar resonance measurements has motivated research on signal enhancement methods, including multipulse sequences that facilitate signal averaging, the development of interlaced pulse sequences, and super-Q coils. More recently, it has been shown that feedback can be used to automatically optimize pulse sequence parameters, maximizing the SNR. This paper extends this work by using feedback to optimize the offset frequency in the strong off-resonant comb pulse sequence. Analysis and results are presented for a sample of sodium nitrite at both liquid nitrogen and room temperatures.
ISSN:1090-7807
1096-0856
DOI:10.1006/jmre.1999.1751