In magnetic resonance, a spin echo or Hahn echo is the refocusing of spin magnetisation by a pulse of resonant electromagnetic radiation. [1] Modern nuclear magnetic resonance (NMR) …

2024年5月4日 · Spin-echo pulse sequences are one of the earliest developed and still widely used (in the form of fast spin echo) of all MRI pulse sequences. The pulse sequence timing …

How is a spin echo generated? A single RF pulse generates a free induction decay (FID), but two successive RF pulses produce a spin echo (SE). The time between the middle of the first RF …

A spin echo sequence has two essential parameters: TR and TE. TR is the time interval between two successive 90° RF waves. It conditions the longitudinal relaxation of the explored tissues …

2022年3月2日 · 2. Turbo spin echo is excellent for fast T2-weighted imaging 3. Spin Echo EPI is routine for diffusion weighted imaging 4. Long TRs are important for T2 weighted imaging …

Spin echo preparation schemes are used to introduce T 2-weighting or T 2 contrast in MRI sequences with low or different contrasts. A common example is the spin echo-echo planar …

In this review article, the principles of the spin echo formation are dem-onstrated on which the generation of the fundamental image contrasts T1, T2, and proton density is based. The basic …