r2eff_ns_cpmg_2site_star(Rr=None,
Rex=None,
RCS=None,
R=None,
M0=None,
r20a=None,
r20b=None,
dw=None,
inv_tcpmg=None,
tcp=None,
back_calc=None,
num_points=None,
power=None)
 source code

The 2site numerical solution to the BlochMcConnell equation using
complex conjugate matrices.
This function calculates and stores the R2eff values.
 Parameters:
Rr (numpy complex64, rank2, 2D array)  The matrix that contains only the R2 relaxation terms
("Redfield relaxation", i.e. nonexchange broadening).
Rex (numpy complex64, rank2, 2D array)  The matrix that contains the exchange terms between the two
states A and B.
RCS (numpy complex64, rank2, 2D array)  The matrix that contains the chemical shift evolution. It works
here only with X magnetization, and the complex notation allows
to evolve in the transverse plane (x, y).
R (numpy complex64, rank2, 2D array)  The matrix that contains all the contributions to the evolution,
i.e. relaxation, exchange and chemical shift evolution.
M0 (numpy float64, rank1, 2D array)  This is a vector that contains the initial magnetizations
corresponding to the A and B state transverse magnetizations.
r20a (float)  The R2 value for state A in the absence of exchange.
r20b (float)  The R2 value for state B in the absence of exchange.
dw (float)  The chemical exchange difference between states A and B in rad/s.
inv_tcpmg (float)  The inverse of the total duration of the CPMG element (in inverse
seconds).
tcp (numpy rank1 float array)  The tau_CPMG times (1 / 4.nu1).
back_calc (numpy rank1 float array)  The array for holding the back calculated R2eff values. Each
element corresponds to one of the CPMG nu1 frequencies.
num_points (int)  The number of points on the dispersion curve, equal to the length
of the tcp and back_calc arguments.
power (numpy int16, rank1 array)  The matrix exponential power array.
