Difference between revisions of "Spendosy.m"

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Ultrafast DOSY pulse sequence. Syntax:
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{{DISPLAYTITLE:spendosy.m}} __NOTOC__
  
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Ultrafast DOSY pulse sequence.
  
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==Syntax==
  
    fid=spendosy(spin_system,parameters,H,R,K,G,F)
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fid=spendosy(spin_system,parameters,H,R,K,G,F)
  
The following parameters are required
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==Arguments==
  
 
  parameters.dims          size of the sample in m
 
  parameters.dims          size of the sample in m
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  parameters.npts          number of spin packets
 
  parameters.npts          number of spin packets
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  parameters.spins          nuclei on which the sequence runs
 
  parameters.spins          nuclei on which the sequence runs
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  parameters.deltat        timestep for acquisition
 
  parameters.deltat        timestep for acquisition
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  parameters.npoints        number of acquired points for each  
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  parameters.npoints        number of acquired points for each
 
                           gradient readout
 
                           gradient readout
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  parameters.nloops        number of loop, where each loop consists of  
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  parameters.nloops        number of loop, where each loop consists of
 
                           a positive and a negative readout
 
                           a positive and a negative readout
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  parameters.offset        offset  
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  parameters.offset        offset
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  parameters.cond          bondary conditions  
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  parameters.cond          bondary conditions
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  parameters.Ga            acquisition gradient in T/m
 
  parameters.Ga            acquisition gradient in T/m
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  parameters.pulsenpoints  number of points in the pulse shape
 
  parameters.pulsenpoints  number of points in the pulse shape
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  parameters.smfactor      smoothing factor for the pulse
 
  parameters.smfactor      smoothing factor for the pulse
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  parameters.Te            duration of the pulse
 
  parameters.Te            duration of the pulse
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  parameters.Tau            duration extra dephasing gradient
 
  parameters.Tau            duration extra dephasing gradient
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  parameters.BW            bandwidth of the pulse
 
  parameters.BW            bandwidth of the pulse
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  parameters.Ge            encoding gradient in T/m
 
  parameters.Ge            encoding gradient in T/m
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  parameters.chirptype      can be 'wurst' or 'smoothed'
 
  parameters.chirptype      can be 'wurst' or 'smoothed'
 
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  parameters.td            diffusion delay  
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  parameters.td            diffusion delay
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  H                        Fokker-Planck Hamiltonian
 
  H                        Fokker-Planck Hamiltonian
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  R                        Fokker-Planck relaxation superoperator
 
  R                        Fokker-Planck relaxation superoperator
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  K                        Fokker-Planck kinetics superoperator
 
  K                        Fokker-Planck kinetics superoperator
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  G                        Fokker-Planck gradient superoperators
 
  G                        Fokker-Planck gradient superoperators
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  F                        Fokker-Planck diffusion and flow superoperator
 
  F                        Fokker-Planck diffusion and flow superoperator
 
Note: the last five parameters are built automatically by [[imaging.m]] context function when this sequence is called from that [[Kernel_contexts|context]].
 
  
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==Outputs==
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fid - free induction decay
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Note: the last five parameters are built automatically by the imaging
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      context function.
  
''Version 1.9, authors: [[Jean-Nicolas Dumez]], [[Ilya Kuprov]], [[Ludmilla Guduff]]''
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jeannicolas.dumez@cnrs.fr
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ilya.kuprov@weizmann.ac.il
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ludmilla.guduff@cnrs.fr

Revision as of 15:13, 5 April 2026


Ultrafast DOSY pulse sequence.

Syntax

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

Arguments

parameters.dims           size of the sample in m
parameters.npts           number of spin packets
parameters.spins          nuclei on which the sequence runs
parameters.deltat         timestep for acquisition
parameters.npoints        number of acquired points for each
                          gradient readout
parameters.nloops         number of loop, where each loop consists of
                          a positive and a negative readout
parameters.offset         offset
parameters.cond           bondary conditions
parameters.Ga             acquisition gradient in T/m
parameters.pulsenpoints   number of points in the pulse shape
parameters.smfactor       smoothing factor for the pulse
parameters.Te             duration of the pulse
parameters.Tau            duration extra dephasing gradient
parameters.BW             bandwidth of the pulse
parameters.Ge             encoding gradient in T/m
parameters.chirptype      can be 'wurst' or 'smoothed'
parameters.td             diffusion delay
H                         Fokker-Planck Hamiltonian
R                         Fokker-Planck relaxation superoperator
K                         Fokker-Planck kinetics superoperator
G                         Fokker-Planck gradient superoperators
F                         Fokker-Planck diffusion and flow superoperator

Outputs

fid - free induction decay
Note: the last five parameters are built automatically by the imaging
      context function.
jeannicolas.dumez@cnrs.fr
ilya.kuprov@weizmann.ac.il
ludmilla.guduff@cnrs.fr