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relaxation time

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relaxation time,
in magnetic resonance imaging, the characteristic time it takes for a sample of atoms, whose nuclei have first been aligned along a static magnetic field and then excited to a higher-energy state by a radiofrequency (rf) signal, to return to a lower-energy equilibrium state. Two time parameters are used to describe the return, or relaxation, to the equilibrium state once the rf signal is turned off: T1> describes the relaxation of the system of spins into a condition of thermal equilibrium with its surroundings. T2> describes the relaxation of the energy that is traded within the system itself. Maps of the values of T1 or T2 as a function of position in the cross-sectional view constitute magnetic resonance images. Also called transverse relaxation time.


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Because I wasn't playing last weekend I headed away with 16 other lads and it was nice to get some relaxation time .
At low deformations, the characteristic relaxation time of the foam is expected to depend on the relaxation time for cell wall bending.
Murray plans to return to his London base and will allow himself some relaxation time.
 
 
 
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