Figure 2.
The behavior of Eq. 5, where T1a/T1b is plotted as a function of T1b for β = 5 and several values of TR and k/N. Note that for a given k/N, T1a/T1b passes through a maximum value, which we label Γ. This maximum occurs at a value T1b = (T1b)m. An important observation is that Γ is independent of TR for a given value of k/N. Using this property, we obtain an approximate function for TR/(T1b)m that depends only on k/N. This is substituted into Eq. 5 to eliminate the functional dependence on TR and T1b on the right-hand side of this equation. A similar procedure was used to obtain the relevant expressions for IR.