Discuss mechanisms behind T2* and S0 variability across brain

[tsalo]

One thing we don't cover is why mean T2* and S0 values vary across the brain. Some mechanisms that might come into play:

• B0 inhomogeneity
• proximity of air-tissue boundaries?
• iron/myelin content?
• would basal neural activity affect T2*?

[tsalo]

This thread has some interesting info: https://neurostars.org/t/interpretation-of-intercept-s0-effects-in-multi-echo-fmri/29480