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free-induction decay |
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free-induction decay (FID), a signal emitted by the atomic nuclei in a tissue after a radiofrequency pulse has excited the nuclear spins at resonance. The decaying oscillation of the nuclei back to their normal state causes them to emit photons, which provide the signal from which a magnetic resonance image is made. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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To fit the initial decay of the q-CPMG echo train, though, it is necessary to estimate the amplitude of the initial free-induction decay. |
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