Table 3 Simulated relative errors of T₁ ^intrinsic, k_f ^TRiST and k_f ^TwiST before and after Q spill-over correction determined over the range of parameters (Table 1) used to determine the coefficients for the spill-over corrected formulae (Table 2), including the effect of a varying T₁ ^intrinsic per Eq. [5]

T₁ ^intrinsic (Eq. 4)

−37.0 ± 16.4

(−66.2, −9.9)

T₁ ^Q-intrinsic (Eq. 6)

0.8 ± 7.9

(−23.2, 16.2)

k_f ^TRiST (Eq. 2)

12.0 ± 12.8

(−8.8, 71.8)

k_f ^Q-TRiST (Eq. 7)

−1.1 ± 10.3

(−35.8, 40.1)

k_f ^TwiST (Eq. 5)

−27.6 ± 17.7

(−60.6, 27.6)

k_f ^Q-TwiST (Eq. 8)

−2.3 ± 14.9

(−36.8, 47.3)