T2

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T2

In magnetic resonance, the time for 63% of transverse relaxation to occur; the value is a function of magnetic field strength and the chemical environment of the hydrogen nucleus; for protons in fat and in water, in a 1.5T magnet, about 60 milliseconds and 250 milliseconds, respectively. A T2-weighted image will have a bright water signal.

T2*

The effective T2 relaxation time, shorter than T2 because of magnetic field inhomogeneities; the observed time constant of free induction decay. In gradient echo images, contrast depends on T2*, whereas in sequences with a 180° rephasing pulse, the contrast depends on T2.
[tē-tū'stăr]

T1, T2, ...

symbols for thoracic nerves.

T1, T2

T2

An MRI term for the time constant at which phase coherence among spins oriented at an angle to the static magnetic field is lost due to interactions between the spins, resulting in a loss of transverse magnetisation and MRI signal.

T2

magnetic resonance The time for 63% of transverse relaxation to occur; the value is a function of magnetic field strength and the chemical environment of the hydrogen nucleus.
References in periodicals archive ?
This is the long-range spin-spin interaction we are looking for," he stated.
But in Hunter's paper, the researchers describe how they were able to infer that such so-called spin-spin forces, if they exist, must be incredibly weak-as much as a million times weaker than the gravitational attraction between the particles.
If a long-range spin-spin force is found, it not only would revolutionize particle physics but might eventually provide geophysicists with a new tool that would allow them to directly study the spin-polarized electrons within Earth.
This approximate model ignores the very weak magnetic spin-spin interactions and the second-order spin-orbit interaction with distant electronic states.
However, when we neglect the weak spin-spin coupling terms, there is a diagonal representation in a molecular basis with S and l as good quantum numbers:
This latter statement is true whether or not we neglect the we ak spin-spin interactions.
This is where those intermolecular spin-spin interactions are coming in handy.
The solid echo sequence provided a good approximation to the free induction decay, from which the proton spin-spin relaxation time ([T.
The polymer-carbon black interaction was evaluated by the measurements of spin-spin relaxation time in pulsed NMR spectroscopy.
From the relation of long spin-spin relaxation time ([T.