sigpy.mri.rf.adiabatic.wurst¶
-
sigpy.mri.rf.adiabatic.
wurst
(n=512, n_fac=40, bw=40000.0, dur=0.002)[source]¶ - Design a WURST (wideband, uniform rate, smooth truncation) adiabatic
- inversion pulse
Parameters: - n (int) – number of samples (should be a multiple of 4).
- n_fac (int) – power to exponentiate to within AM term. ~20 or greater is typical.
- bw (float) – pulse bandwidth.
- dur (float) – pulse time (s).
Returns: 2-element tuple containing
- a (array): AM waveform.
- om (array): FM waveform (radians/s).
References
Kupce, E. and Freeman, R. (1995). ‘Stretched Adiabatic Pulses for Broadband Spin Inversion’. J. Magn. Reson. Ser. A., 117:246-256.