Fig. 2.

Optimization of prior standard deviations σ₀ based on error in parameter estimates on simulated data. a) The effect of priors on $R_2^{\stackrel{\stackrel{’}{}}{{\displaystyle }}}$ error, which is not strongly affected by σ₀, except at ${\sigma }_0\left(R_2^{\stackrel{\stackrel{’}{}}{{\displaystyle }}}\right)$ ≤ 1. b) The effect of priors on DBV error, which diverges quickly at low ${\sigma }_0\left(R_2^{\stackrel{\stackrel{’}{}}{{\displaystyle }}}\right)$, but is consistently at ${\sigma }_0\left(R_2^{\stackrel{\stackrel{’}{}}{{\displaystyle }}}\right)$ ≥ 10. c) The effect of priors on OEF error, which was lowest for ${\sigma }_0\left(R_2^{\stackrel{\stackrel{’}{}}{{\displaystyle }}}\right)$ > 1.