Difference between revisions of "Phase enc 3d.m"

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m (Kuprov moved page Slice phase enc.m to Phase enc 3d.m)
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{{DISPLAYTITLE:slice_phase_enc.m}}
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{{DISPLAYTITLE:phase_enc_3d.m}}
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3D MRI pulse sequence, with a slice selection stage followed by phase-encoded acquisition in the slice selected.
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3D MRI pulse sequence, with a slice selection stage followed by phase-encoded acquisition of the slice. This sequence must be called from the [[imaging.m]] context, which would provide H,R,K,G, and F.
  
 
==Syntax==
 
==Syntax==
  
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     mri=slice_phase_enc(spin_system,parameters,H,R,K,G,F)
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     fid=phase_enc_3d(spin_system,parameters,H,R,K,G,F)
  
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==Description==
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==Parameters==
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This sequence must be called from the imaging() context, which would provide H,R,K,G, and F.
 
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==Arguments==
 
  
 
   parameters.ss_grad_amp  -  the amplitude of slice selection  
 
   parameters.ss_grad_amp  -  the amplitude of slice selection  
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   parameters.ro_grad_dur  -  the duration of the readout gradient,
 
   parameters.ro_grad_dur  -  the duration of the readout gradient,
 
                               seconds
 
                               seconds
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  parameters.image_size    -  number of points in each dimension of
 
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                              the resulting image
 
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  parameters.gs_ampl      -  direction of the slice selection
 
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                              gradient, a three-element unit vector
 
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  parameters.gp_ampl      -  direction of the phase encoding
 
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                              gradient, a three-element unit vector
 
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  parameters.gr_ampl      -  direction of the readout gradient,
 
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                              a three-element unit vector
 
 
   
 
   
 
   parameters.image_size    -  number of points in each dimension of
 
   parameters.image_size    -  number of points in each dimension of
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==Outputs==
 
==Outputs==
  
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   mri - MRI image of the slice with square sine bell apodisation
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   fid - k-space representation of the image
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        in the k-space.
 
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==Examples==
 
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See phase_enc_3d.m file in examples/imaging directory.
 
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==Notes==
 
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This function benefits significantly from [[Appendix F: expert-level options#NVidia Tesla coprocessor support|GPU processing]].
 
  
 
==See also==
 
==See also==
 
[[phase_enc.m]], [[dwi.m]], [[epi.m]], [[spiral.m]]
 
[[phase_enc.m]], [[dwi.m]], [[epi.m]], [[spiral.m]]
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[[Built-in_experiments#Magnetic_resonance_imaging|Magnetic resonance imaging]]
  
  
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''Version 2.1, authors: [[Ilya Kuprov]], [[Ahmed Allami]]''
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''Version 2.9, authors: [[Ilya Kuprov]], [[Ahmed Allami]]''

Revision as of 17:31, 6 May 2024

3D MRI pulse sequence, with a slice selection stage followed by phase-encoded acquisition of the slice. This sequence must be called from the imaging.m context, which would provide H,R,K,G, and F.

Syntax

    fid=phase_enc_3d(spin_system,parameters,H,R,K,G,F)

Parameters

 parameters.ss_grad_amp   -  the amplitude of slice selection 
                             gradient,T/m

 parameters.pe_grad_amp   -  phase encoding gradient amplitude, T/m
 
 parameters.ro_grad_amp   -  readout gradient amplitude, T/m

 parameters.ss_grad_dur   -  the duration of the slice selection 
                             gradient, seconds 

 parameters.pe_grad_dur   -  the duration of the phase encoding 
                             gradient, seconds 

 parameters.ro_grad_dur   -  the duration of the readout gradient,
                             seconds

 parameters.image_size    -  number of points in each dimension of
                             the resulting image

Outputs

 fid - k-space representation of the image

See also

phase_enc.m, dwi.m, epi.m, spiral.m

Magnetic resonance imaging


Version 2.9, authors: Ilya Kuprov, Ahmed Allami

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