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 ?
Among the topics are the physical basis of the NMR experiment, proton chemical shifts and spin-spin coupling constants as functions of structure, the influence of molecular symmetry and chirality on proton magnetic resonance spectra, carbon-13 NMR spectroscopy, selected heteronuclei, and NMR of partially oriented molecules and solid-state NMR.
Making a breakthrough in the field of particle physics, they have established new limits on what scientists call "long-range spin-spin interactions" between atomic particles.
This is the long-range spin-spin interaction we are looking for," he stated.
Friebolin tracks the trends and makes sure students learn the basics as well in his chapters on the physical basis of NMR spectroscopy, the chemical shift, indirect spin-spin coupling, spectrum analysis and calculations, double resonance experiments, assignment of signals, relaxation, one- dimensional NMR experiments using complex pulse sequences, 2D NMR spectroscopy, the nuclear Overhauser effect, Dynamic NMR spectroscopy, shift reagents, macromolecules, and NMR spectroscopy in biology and medicine.
2], the radial kinetic energy operator, the spin-spin dipole interaction, and the atomic hyperfine Hamiltonians.
This approximate model ignores the very weak magnetic spin-spin interactions and the second-order spin-orbit interaction with distant electronic states.
Warren and Jeener's descriptions of the intermolecular spin-spin effect--in the twin languages of quantum mechanics and classical physics--eventually removed the long-standing doubt that these interactions show up in magnetic resonance data.
In this article, the physical properties of compounds using WMB are compared with dry-mixing compounds, and the characteristics of WMB are investigated by means of the spin-spin relaxation time, the fracture surface energy and the dynamic creep.