Table 3.

Accuracies (root-mean squared error) determined through simulation over 20 000 independent trials in a water signal at a SNR of 20. High accuracy is achieved for the chemical shifts and amplitudes from four to sixteen echoes. $T_2^{*}$ values also has high accuracy but increases to >1% (0.6 ms) at ≤5 echoes.

No. of Echoes	Water PRF (ppm)	Water $T_2^{*}$ (% error)	Water amplitude (% error)
4	1.85×10−4	5.65	4.02×10−2
5	1.36×10−4	1.03	4.02×10−2
6	1.05×10−4	0.493	3.82×10−2
7	8.44×10−5	0.246	3.64×10−2
8	7.24×10−5	0.194	3.47×10−2
12	4.29×10−5	0.107	3.01×10−2
16	3.16×10−5	0.076	2.82×10−2