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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Prog Nucl Magn Reson Spectrosc. 2012 Jun 15;68:41–57. doi: 10.1016/j.pnmrs.2012.06.001

Fig. 1.

Fig. 1

Dependence of signals of nuclear spins (water) on flip-angles from thermal equilibrium. Panels on the left show the free induction decays (FID) calculated after a 45°, 90°, 135° or 179.9° pulse to equilibrium magnetization and the panels on the right show the respective Fourier transformed spectra. FIDs are simulated by numerical integration of Eq. (1) with the parameters: τrd = 25 ms, R1 = R2 = 10 Hz and ω = 50 Hz. The calculations were performed over 1024 complex points with a spectral width of 250 Hz and the time domain data were fast Fourier transformed without any apodization. The vertical scales of FID and spectrum are normalized with reference to 179.9° pulse data (figure made using information presented in Ref. [35]).