Pulse sequence
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/88/MRI_2DFT_SE_PulseSequence.png/220px-MRI_2DFT_SE_PulseSequence.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Noesy_pulse_sequence.png/220px-Noesy_pulse_sequence.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/62/INEPT_Pulse_Sequence.png/220px-INEPT_Pulse_Sequence.png)
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 applied by switching magnetic fields that exhibit a space-dependent gradient which can be used to reconstruct spatially resolved images after applying Fourier transforms.[2]
The outcome of pulse sequences is often analyzed using the product operator formalism.
See also
- Spin echo
- Insensitive nuclei enhanced by polarization transfer
- MRI sequence
References
External links
- Pulse sequences in the online textbook
- The Basics of NMR (by Joseph Hornak)
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