Table 2.

A comparison of $T_2^{*}$ contributions at 1.5 T and 6.5 mT, along with the typical total value of $T_2^{*}.$ A value of T₂ = 10 s is used in both cases [57], while T_2,in ~ 0.143 s is used for the 1.5 T case [41]. ³He $T_2^{*}$ is based on our measured ΔB₀ ≃ 0.04 G. Inverse values (relaxation rates) are given in square brackets.

$T_2^{*}$ Contribution	B0 = 1.5 T	B0 = 6.5 mT
	ΔB0 ~ 0.1 G	ΔB0 ~ 0.4 G
T2 (s) [R2 (s−1)]	10 [0.1]	10 [0.1]
T2,in (s) [R2,in (s−1)]	0.143 [6.99]	0.016 [62.5]
T2,sus (s) [R2,sus (s−1)]	0.0046 [217.4]	1.10 [0.91]
T2,diff (s) [R2,diff (s−1)]	0.031 [32.3]	1672 [0.0006]
T2,grad (s) [R2,grad (s−1)]	0.512 [1.95]	3.6 [0.28]
$T_2^{*}$ (ms) [$R_2^{*}$ (s−1)]	3.8 [263.1]	15.6 [64.1]