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. 2014 Jun 3;27(8):918–925. doi: 10.1002/nbm.3137

Table 3.

Statistics from simulations with anisotropic DTs for each approximation using the preclinical STEAM protocol and a SNR of 20. Two simulated datasets were created, one with the DT perpendicular (⊥) and one with the DT parallel (∥) to the butterfly gradient direction. The units of λ1 are 10− 10m2s− 1; the units of α are degrees. The true FA is 0.603 and the true λ1 is 6 × 10− 10m2s− 1. Higher γ is better in this experiment

Gradients Uncompensated Compensated
Analysis A1 A2 A3 A1/A2 A3
DT orientation ⊥ ∥ ⊥ ∥ ⊥ ∥ ⊥ ∥ ⊥ ∥
FA 0.514 0.884 0.573 0.495 0.573 0.495 0.575 0.574 0.575 0.574
std 0.035 0.166 0.025 0.042 0.025 0.042 0.020 0.021 0.020 0.021
λ1 5.518 1.522 5.278 3.377 5.278 3.377 5.566 5.544 5.566 5.544
Std 0.262 0.270 0.212 0.185 0.212 0.185 0.161 0.165 0.161 0.165
α 4.670 63.714 2.537 5.058 2.537 5.058 1.946 1.992 1.946 1.992
γ 5.309 1.909 6.238 5.362 6.238 5.362 6.766 6.719 6.766 6.719