T1

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T1

In magnetic resonance, the time for 63% of longitudinal 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 250 milliseconds and 3000 milliseconds, respectively. A T1-weighted image will have a bright fat signal.

T1

An MRI term for the time constant at which spins realign themselves with the external magnetic field after excitation.

T1

magnetic resonance The time for 63% of longitudinal relaxation to occur; the value is a function of magnetic field strength and the chemical environment of the hydrogen nucleus.
References in periodicals archive ?
[ROA.sub.t-1] is earnings before interest and taxes divided by total assets adjusted by the industry median at year t-1. [DUAL.sub.t-1] is a dummy variable which takes 1 if the CEO simultaneously holds the chairman position at year t-1 and 0 otherwise.
High (Low) Readability is equal to one if the natural logarithm of the firm's 10-K file size in fiscal year t-1 is in the bottom (top) tercile, ranked by fiscal year and industry.
* Real GDP growth forecast errors, [Ey.sup.t,t-1.sub.i,t], are the difference between the estimate published in year t and the forecast presented in year t-1.
In order to keep entry costs low and eliminate interoperability issues, the T-1 service provider will include a router supporting a single T-1 circuit.
[DELTA][AP.sub.t-1] = scaled change in accounts payable and accrued liabilities in year t-1 (i.e., ([AP.sub.t-1], - [AP.sub.t-2]/[ta.sub.t-1])),
The problem was the T-1, which we just had a close pass, was to our left and now at our altitude.
Again, it is natural to choose special reference vectors for the measures defined by (13): a Laspeyres type measure aL that chooses the period t-1 reference technology and reference input vector xt-1 and a Paasche type measure aPt that chooses the period t reference technology and reference input vector xt:
Using full-power magnum loads in both calibers in the handguns, neither the T-1 nor the GG&G showed any ill effects.
A passes to target man T-1, who passes back to the near target man (T-2).
The surface mount lamps are available in T-1, T-1 1/4, and T-1 1/2 sizes with lamp profiles as low as 5.2 mm.
TI: A Survival Guide, by Matthew Gast (ISBN: 0-596-001274, $29.95), brings together in one reference all the information that network administrators will need to set up, test, and troubleshoot T-1 lines, including how to deal with routers, serial links, smart jacks, and more.