analyze.header.to.vox2ras: Compute a transformation matrix from the fields of an ANALYZE...
In freesurferformats: Read and Write 'FreeSurfer' Neuroimaging File Formats
analyze.header.to.vox2ras R Documentation
Compute a transformation matrix from the fields of an ANALYZE 7.5 header.
Description
Compute the voxel-to-RAS matrix for an ANALYZE 7.5 image, using the conventions of SPM and of the
original ANALYZE software. See the "geometry" section of read.fs.volume.analyze for what this
matrix is and is not.
Usage
analyze.header.to.vox2ras(analyzeheader)
Arguments
analyzeheader
named list, an ANALYZE 7.5 header as returned by read.analyze.header.
Value
a 4x4 numeric matrix, the voxel-to-RAS transformation matrix. The matrix assumes that the first voxel
axis points to the left (i.e. it contains -pix_dim[2] in its first column), which is the convention of the
format. If the SPM origin is present in the header, the matrix maps the origin to the world position that the
SPM fields describe, otherwise the center of the image is used as the origin, exactly as the reference
implementation of the format (nibabel) does it.
freesurferformats documentation built on Sept. 25, 2026, 1:07 a.m.
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| analyze.header.to.vox2ras | R Documentation |
Compute a transformation matrix from the fields of an ANALYZE 7.5 header.
Description
Compute the voxel-to-RAS matrix for an ANALYZE 7.5 image, using the conventions of SPM and of the
original ANALYZE software. See the "geometry" section of read.fs.volume.analyze for what this
matrix is and is not.
Usage
analyze.header.to.vox2ras(analyzeheader)
Arguments
analyzeheader |
named list, an ANALYZE 7.5 header as returned by |
Value
a 4x4 numeric matrix, the voxel-to-RAS transformation matrix. The matrix assumes that the first voxel
axis points to the left (i.e. it contains -pix_dim[2] in its first column), which is the convention of the
format. If the SPM origin is present in the header, the matrix maps the origin to the world position that the
SPM fields describe, otherwise the center of the image is used as the origin, exactly as the reference
implementation of the format (nibabel) does it.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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