Figure 3.

(A) Comparison of the attenuation of magnetization in the absence (red) and presence (blue) of a 4° RF pulse. The inset shows the “sloping step-wise” signal attenuation due to the RF pulses applied every 1 s. (B) Data points were generated for nuclear spins having a longitudinal relaxation time, T₁, of 40 s and different read pulse angles.

Notes: These data were fitted using the ‘classical’ Bloch T₁ relaxation equation (Equation (1), full lines); we report the error in such T₁ estimations.