sigpy.mri.rf.slr.root_flip¶
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sigpy.mri.rf.slr.
root_flip
(b, d1, flip, tb, verbose=False)[source]¶ Exhaustive root-flip pattern search for min-peak b1
Parameters: - b (array) – SLR beta parameter.
- d1 (float) – passband ripple level.
- flip (array) – target flip angle.
- tb (int) – pulse time bandwidth product.
- verbose (bool) – print feeback on iterations.
Returns: 2-element tuple containing
- rf_out (array): rf pulse out.
- b_out (array): SLR beta parameter.
References
Sharma, A. Lustig, M. and Grissom, W. (2016). Root-flipped multiband refocusing pulses. Magn Reson Med. 2016 Jan; 75(1): 227-237.