longitudinal relaxation


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lon·gi·tu·di·nal re·lax·a·tion

in nuclear magnetic resonance, the return of the magnetic dipoles of the hydrogen nuclei (magnetization vector) to equilibrium parallel to the magnetic field, after they have been flipped 90°; varies in rate in different tissues, taking up to 15 s for water. See: TI.

longitudinal relaxation

An MRI term for the return of longitudinal magnetisation to equilibrium after excitation due to an exchange of energy between the nuclear spins and the lattice.

lon·gi·tu·di·nal re·lax·a·tion

(long'ji-tū'di-năl rē'lak-sā'shŭn)
magnetic resonance imaging The return of the magnetic dipoles of the hydrogen nuclei (magnetization vector) to equilibrium parallel to the magnetic field, after they have been flipped 90°; varies in rate in different tissues, taking up to 15 seconds for water.
See: TI
References in periodicals archive ?
In light of a recent report of Longitudinal Relaxation Enhancement (LRE) phenomena ex vivo [2], this study utilizes a similar technique to measure [T.
In that work, the FID in the absence of radiation damping is assumed to be a simple exponential, and longitudinal relaxation is neglected.

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