pulpy.rf.shim.calc_shims

pulpy.rf.shim.calc_shims(shim_roi, sens, x0, dt, lamb=0, max_iter=50)[source]

RF shim designer. Uses the Gerchberg Saxton algorithm.

Parameters:

  • shim_roi (array) – region within volume to be shimmed. Mask of 1’s and 0’s. [dim_x dim_y dim_z]

  • sens (array) – sensitivity maps. [Nc dim_x dim_y dim_z]

  • x0 (array)

  • dt (float) – hardware sampling dwell time.

  • lamb (float) – regularization term.

  • max_iter (int) – max number of iterations.

Returns:

Vector of complex shim weights.