Difference between revisions of "Spiral.m"
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2D imaging sequence with spiral sampling of the k-space. | 2D imaging sequence with spiral sampling of the k-space. | ||
==Syntax== | ==Syntax== | ||
| − | + | mri=spiral(spin_system,parameters,H,R,K,G,F) | |
| − | == | + | ==Arguments== |
| − | + | ||
| + | parameters.t_echo - echo time, seconds | ||
| − | + | parameters.spiral_frq - frequency of the spiral, Hz | |
| − | |||
| − | |||
| − | |||
| − | |||
parameters.spiral_dur - duration of the spiral, seconds | parameters.spiral_dur - duration of the spiral, seconds | ||
| − | + | ||
| − | parameters. | + | parameters.grad_amp - gradient amplitude at the end |
of the spiral, T/m | of the spiral, T/m | ||
==Outputs== | ==Outputs== | ||
| − | + | mri - MRI image with square sinebell apodisation | |
| − | + | ||
| + | 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. | ||
| + | |||
| + | ilya.kuprov@weizmann.ac.il | ||
| + | a.j.allami@soton.ac.uk | ||
| + | |||
==Examples== | ==Examples== | ||
| + | |||
See spiral_2d.m file in examples/imaging directory. | See spiral_2d.m file in examples/imaging directory. | ||
==Notes== | ==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. | 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== | ==See also== | ||
| + | |||
[[phase_enc.m]], [[epi.m]], [[dwi.m]], [[fse.m]] | [[phase_enc.m]], [[epi.m]], [[dwi.m]], [[fse.m]] | ||
''Version 2.1, authors: [[Ilya Kuprov]], [[Ahmed Allami]]'' | ''Version 2.1, authors: [[Ilya Kuprov]], [[Ahmed Allami]]'' | ||
| + | |||
| + | ==Description== | ||
| + | |||
| + | Reasonable description of what the function does and how. | ||
Revision as of 15:04, 5 April 2026
2D imaging sequence with spiral sampling of the k-space.
Syntax
mri=spiral(spin_system,parameters,H,R,K,G,F)
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_amp - gradient amplitude at the end
of the spiral, T/m
Outputs
mri - MRI image with square sinebell apodisation
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.
ilya.kuprov@weizmann.ac.il a.j.allami@soton.ac.uk
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
Description
Reasonable description of what the function does and how.
