Pulse sequence
Timing diagram for an MRI spin echo pulse sequence.
In Fourier transform NMR spectroscopy and imaging, a pulse sequence describes a series of radio frequency pulses applied to the sample, such that the free induction decay is related to the characteristic frequencies of the desired signals. After applying a Fourier transform, the signal can be represented in the frequency domain as the NMR spectrum. In magnetic resonance imaging, additional gradient pulses are being applied by switching magnetic fields that exhibit a space-dependent gradient which can be used to reconstruct spatially resolved images after applying Fourier transforms.[1]
The outcome of pulse sequences is often analyzed using the product operator formalism.
See also
References
- ↑ Bernstein, M.A.; King, K.E.; Zhou, X.J.; Fong, W. (2004). Handbook of MRI Pulse Sequences. Retrieved 2008-04-08.
External links
- Pulse sequences in the online textbook
- The Basics of NMR (by Joseph Hornak)
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