Relaxation models

See section on magnetic relaxation.

Longitudinal relaxation

Mz_free(R1, T[, v, Fw, j, n0, me])	Free longitudinal magnetization.
Mz_ss(R1, TR, FA[, v, Fw, j, me])	Steady-state longitudinal tissue magnetization.
Mz_spgr(R1, T, TR, FA[, v, Fw, j, n0, me])	Longitudinal tissue magnetization of a spoiled gradient-echo sequence.

Relaxivity

relax(c, R10, r1)

Derive longitudinal R1 from tissue concentrations assuming a linear relation.