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목록T2 이완 (2)
방사선사나라 Radiographer Nara

(영어/영문/English) 1. T2 Decay (T2 relaxation, Transverse relaxation, Spin-Spin relaxation) MR signal decreases due to interaction between spins The RF pulse causes the magnetization (or spin) arranged in the vertical axis (Z) alongside the external magnetic field to lie in the horizontal (X-Y) plane. At this time, the phase of the spins is in-phase. Over time, in-phase spins are dispersed in the t..

(영어/영문/English) What is T2 relaxation time? It is defined as the time required for the transverse component of M to decay to 37% of the initial transverse magnetization. When 90 degrees RF pulse is applied to the longitudinal axis magnetization in thermal equilibrium, the longitudinal magnetization is reduced and a new transevaerse magnetization is created. At this time, each spins are placed on..