Module relaxometry 

R2/T2 mapping from multi-echo spin-echo (EPG), and R2’ = R2* − R2.

EPG-based fitting models imperfect refocusing (B1 < 1) so it removes the stimulated-echo bias that a mono-exponential fit suffers. [r2prime] combines the spin-echo R2 with a gradient-echo R2* (from r2star) for chi-separation.

Structs

R2EpgParams

Parameters for r2_epg dictionary matching.

Functions

epg_cpmg_echoes

Simulate the CPMG multi-echo spin-echo magnitude train.

r2_epg

R2 mapping from multi-echo spin-echo magnitude via EPG dictionary matching.

r2prime

Compute R2’ = R2* − R2, clamped at zero, within the mask.