Spiral.m

2D imaging sequence with spiral sampling of the k-space.

Syntax

    mri=spiral_pulse_sequence(spin_system,parameters,H,R,K,G,F)

Description

Reasonable description of what the function does and how.

Arguments

     parameters.t_echo     - echo time, seconds

     parameters.spiral_frq - frequency of the spiral, Hz 

     parameters.spiral_dur - duration of the spiral, seconds

     parameters.grad_ampl  - gradient amplitude at the end 
                             of the spiral, T/m

Outputs

    mri - MRI image with square sinebell apodisation

Examples

See spiral_2d.m file in examples/imaging directory.

Notes

Prior to being Fourier transformed, the spiral is resampled onto a suitable square grid - change the sequence to output spiral_x, spiral_y and spiral_z variables if you plan to process the data in a different way.

See also

phase_enc.m, epi.m, dwi.m, fse.m

Version 2.1, authors: Ilya Kuprov, Ahmed Allami