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T2*-weighted imaging of the brain 26 weeks after subarachnoid hemorrhage, showing hemosiderin deposits as hypointense areas. [1] T 2 *-weighted imaging is an MRI sequence to quantify observable or effective T 2 (T2* or "T2-star"). In this sequence, hemorrhages and hemosiderin deposits become hypointense. [2]
T2 weighted: T2: Measuring spin–spin relaxation by using long TR and TE times Higher signal for more water content [1] Low signal for fat in standard Spine Echo (SE), [1] though not with Fast Spin Echo/Turbo Spin Echo (FSE/TSE). FSE/TSE is the standard of care in modern medicine because it is faster.
which has terms for precession, T2 relaxation, and T1 relaxation. In 1956, H.C. Torrey mathematically showed how the Bloch equations for magnetization would change with the addition of diffusion. [22] Torrey modified Bloch's original description of transverse magnetization to include diffusion terms and the application of a spatially varying ...
In statistics, particularly in hypothesis testing, the Hotelling's T-squared distribution (T 2), proposed by Harold Hotelling, [1] is a multivariate probability distribution that is tightly related to the F-distribution and is most notable for arising as the distribution of a set of sample statistics that are natural generalizations of the statistics underlying the Student's t-distribution.
The longitudinal (or spin-lattice) relaxation time T 1 is the decay constant for the recovery of the z component of the nuclear spin magnetization, M z, towards its thermal equilibrium value, ,.
"Let’s be crystal clear: this bill would increase unfairness in how Social Security benefits are calculated," Grassley, R-Iowa, said in a speech on the Senate floor last month.
Pay grades [1] are used by the eight structurally organized uniformed services of the United States [2] (Army, Marine Corps, Navy, Air Force, Space Force, Coast Guard, Public Health Service Commissioned Corps, and NOAA Commissioned Officer Corps), as well as the Maritime Service, to determine wages and benefits based on the corresponding military rank of a member of the services.
The most notable change to Social Security benefits in 2025 should be good news. All current recipients will receive a boost to their monthly benefit thanks to the Social Security cost-of-living ...