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faq:how_is_anatomical_functional_or_statistical_volume_data_described [2011/11/02 15:02]
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faq:how_is_anatomical_functional_or_statistical_volume_data_described [2017/08/17 11:21] (current)
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 ===== How is anatomical, functional or statistical "​volume data" described? ===== ===== How is anatomical, functional or statistical "​volume data" described? =====
  
-One data object used throughout FieldTrip is that of "​volume data", i.e. data that can be described as a regular ​arangement ​of voxels in a 3D volume. For example, the function **[[:​reference:​ft_read_mri]]** is used to read anatomical MRI data. The function **[[:​reference:​ft_sourceanalysis]]** is used to perform a beamformer scan on a regular 3D grid. The function **[[:​reference:​ft_sourcestatistics]]** can be used to do statistics on the **[[:​reference:​ft_sourceanalysis]]** output, and therefore also statistical parameters such as t-score and probability are defined on a grid that is the same as the source grid.+One data object used throughout FieldTrip is that of "​volume data", i.e. data that can be described as a regular ​arrangement ​of voxels in a 3D volume. For example, the function **[[:​reference:​ft_read_mri]]** is used to read anatomical MRI data. The function **[[:​reference:​ft_sourceanalysis]]** is used to perform a beamformer scan on a regular 3D grid. The function **[[:​reference:​ft_sourcestatistics]]** can be used to do statistics on the **[[:​reference:​ft_sourceanalysis]]** output, and therefore also statistical parameters such as t-score and probability are defined on a grid that is the same as the source grid.
  
 All functions that accept volume data as input, or that give volume data as output, work with the same basic data structure. An anatomical or functional volume containing Nx*Ny*Nz voxels at least contains the following fields: All functions that accept volume data as input, or that give volume data as output, work with the same basic data structure. An anatomical or functional volume containing Nx*Ny*Nz voxels at least contains the following fields: