FieldTrip

Note that this reference documentation is identical to the help that is displayed in Matlab when you type “help ft_prepare_mesh”.

  FT_PREPARE_MESH creates a triangulated surface mesh for the volume
  conduction model. The mesh can either be selected manually from raw
  mri data or can be generated starting from a segmented volume
  information stored in the mri structure. The result is a bnd
  structure which contains the information about all segmented surfaces
  related to mri and are expressed in world coordinates.
 
  Use as
    bnd = ft_prepare_mesh(cfg, mri)
 
  Configuration options:
    cfg.interactive     = 'no' (default) or 'yes' (manual interaction)
    cfg.tissue          = list with segmentation values corresponding with each compartment
    cfg.numvertices     = vector, length equal cfg.tissue.  e.g. [2000 1000 800];
    cfg.downsample      = integer (1,2, ...) defines the level of refinement of the mri data
    cfg.sourceunits     = e.g. 'mm'
    cfg.headshape       = (optional) a filename containing headshape, a Nx3 matrix with surface
                          points, or a structure with a single or multiple boundaries
 
  To facilitate data-handling and distributed computing with the peer-to-peer
  module, this function has the following options:
    cfg.inputfile   =  ...
    cfg.outputfile  =  ...
  If you specify one of these (or both) the input data will be read from a *.mat
  file on disk and/or the output data will be written to a *.mat file. These mat
  files should contain only a single variable, corresponding with the
  input/output structure.
 
  Example use:
    mri=ft_read_mri('Subject01.mri');
    cfg=[];
    cfg.output={'scalp', 'skull', 'brain'};
    segment=ft_volumesegment(cfg, mri);
    scalp=(segment.scalp)&~(segment.skull | segment.brain);
    skull=2*(segment.skull);
    brain=3*(segment.brain);
    segment.seg=scalp+skull+brain;
    cfg=[];
    cfg.tissue=[1 2 3];
    cfg.numvertices=[2000 1000 800];
    cfg.sourceunits=segment.unit;
    bnd = ft_prepare_mesh(cfg, segment);