If no R1 values has been loaded, but the R1_fit flag has been turned on, the R1 will be fitted as well.
For '''on-resonance''' models, f.ex [[M61]], (see also [[Relax_disp.spin_lock_offset%2Bfield | relaxx disp.spin lock offset+field]] )), if <br>
and as such <br>
<math>
cos^2\theta = cos^2\left(\frac{\pi}{2}\right)= 0.0
</math>
Therefore the fitted R1 values have no meaning for "No Rex" model.
== Reference ==