Table 1.

A comparison of slow and fast transverse relaxation times for different agarose concentrations and dependence of visibility Visibility^SQ (ΔM_o/Δ[Na]) and visibility^IR (ΔMo/Δ [Na]) on agarose concentration. Visibility^SQ and visibility^IR for all concentrations of agarose were obtained using SQ and IR techniques. All transverse relaxation time constants T_2s^SE, T_2s^SE and T_2s^IR, T_2s^IR were determined by single quantum Hahn spin echo and IR pulse sequence on NMR.

% w/v Agarose	T2sSE	T2sSE	MRI VisibilitySQ	T2sIR	T2sIR	MRI VisibilityIR
10	12.4 ± 1.2	8.1 ± 0.48	1.75	13.7 ± 1.2	7.4 ± 0.5	3.45
20	7.5 ± 0.35	4.1 ± 0.31	1.65	8.4 ± 0.3	3.4 ± 0.3	4.50
30	7.1 ± 1.61	1.8 ± 0.04	1.5	6.4 ± 0.2	1.8 ± 0.04	4.70
40	3.4 ± 0.1	1.2 ± 0.04	1.4	4.6 ± 0.2	1.2 ± 0.1	7.22