RF pulse design (pulpy.rf)

The module contains functions and classes for MRI RF pulse design. It contains functions to design a variety of RF pulses, such as SLR, adiabatic, parallel transmit, multibanded, and others.

Adiabatic Pulse Design Functions

Adiabatic Pulse Design functions.

pulpy.rf.adiabatic.bir4	Design a BIR-4 adiabatic pulse.
pulpy.rf.adiabatic.hypsec	Design a hyperbolic secant adiabatic pulse.
pulpy.rf.adiabatic.wurst	Design a WURST (wideband, uniform rate, smooth truncation) adiabatic
pulpy.rf.adiabatic.goia_wurst	Design a GOIA (gradient offset independent adiabaticity) WURST
pulpy.rf.adiabatic.bloch_siegert_fm	U-shaped FM waveform for adiabatic Bloch-Siegert \(B_1^{+}\) mapping and spatial encoding.

B1-Selective Pulse Design Functions

\(B_1^{+}\)-selective RF Pulse Design functions.

pulpy.rf.b1sel.dz_b1_rf	Design a \(B_1^{+}\)-selective excitation pulse following Grissom JMR 2014
pulpy.rf.b1sel.dz_b1_gslider_rf	Design a \(B_1^{+}\)-selective excitation gSlider pulse following
pulpy.rf.b1sel.dz_b1_hadamard_rf	Design a \(B_1^{+}\)-selective Hadamard-encoded pulse following Grissom JMR 2014.

Pulse Multibanding Functions

Multiband RF Pulse Design functions.

pulpy.rf.multiband.mb_rf	Multiband an input RF pulse.
pulpy.rf.multiband.dz_pins	PINS multiband pulse design.

Optimal Control Design Functions

Optimal Control Pulse Design functions.

pulpy.rf.optcont.blochsim	1D RF pulse simulation, with simultaneous RF + gradient rotations.
pulpy.rf.optcont.deriv	1D RF pulse simulation, with simultaneous RF + gradient rotations.

Parallel Transmit Pulse Designers

MRI RF excitation pulse design functions, including SLR and small tip spatial design

pulpy.rf.ptx.stspa	Small tip spatial domain method for multicoil parallel excitation.
pulpy.rf.ptx.stspk	Small tip spokes parallel transmit pulse designer.

RF Shimming Functions

MRI RF shimming.

pulpy.rf.shim.calc_shims	RF shim designer.
pulpy.rf.shim.init_optimal_spectral	Function to return initial shim weights based on an optimal spectral method, an eigenvector-based method.
pulpy.rf.shim.init_circ_polar	Function to return circularly polarized initial shim weights.

SLR Pulse Design Functions

MRI RF excitation pulse design functions, including SLR and small tip spatial design

pulpy.rf.slr.dzrf	Primary function for design of pulses using the SLR algorithm.
pulpy.rf.slr.root_flip	Exhaustive root-flip pattern search for min-peak b1
pulpy.rf.slr.dz_gslider_rf	Design a g-slider pulse rf
pulpy.rf.slr.dz_gslider_b	Design a g-slider pulse b
pulpy.rf.slr.dz_hadamard_b	Design a pulse with hadamard encoding
pulpy.rf.slr.dz_recursive_rf	Recursive SLR pulse design.

RF Utility

MRI RF utilities.

pulpy.rf.util.dinf

Calculate D infinity for a linear phase filter.