nifti.header.to.vox2ras

The NIFTI v1 header can store up to two descriptions of the mapping from voxel indices to world
coordinates: the <code>sform</code> (a full affine matrix in the <code>srow_x</code>, <code>srow_y</code> and <code>srow_z</code> fields) and the <code>qform</code> (a
rotation, given as a quaternion, plus a translation, given in the <code>quoffset</code> fields). Each of them is only valid
if the corresponding code field is not zero, and the <code>sform</code> takes precedence over the <code>qform</code> if both are
present. This is the same rule that the NIFTI standard defines and that other implementations (<code>nibabel</code>,
<code>oro.nifti</code>) follow.

internal

Provides functions to read and write neuroimaging data in various file formats, with a focus on 'FreeSurfer' formats. This includes, but is not limited to, the following file formats: 1) MGH/MGZ/NIFTI format files, which can contain multi-dimensional images or other data. Typically they contain time-series of three-dimensional brain scans acquired by magnetic resonance imaging (MRI). They can also contain vertex-wise measures of surface morphometry data. The MGH format is named after the Massachusetts General Hospital, and the MGZ format is a compressed version of the same format. 2) 'FreeSurfer' morphometry data files in binary 'curv' format. These contain vertex-wise surface measures, i.e., one scalar value for each vertex of a brain surface mesh. These are typically values like the cortical thickness or brain surface area at each vertex. 3) Annotation file format. This contains a brain surface parcellation derived from a cortical atlas. 4) Surface file format. Contains a brain surface mesh, given by a list of vertices and a list of faces.

Tim Schc3<a4>fer

freesurferformats

Read and Write 'FreeSurfer' Neuroimaging File Formats

Tim Schäfer

Van Essen Lab 

Montreal Neurological Institute (MNI) 

nifti.header.to.vox2ras function

<dl><dt>niiheader</dt>
<dd>named list, a NIFTI v1 header as returned by <code>read.nifti1.header</code>.</dd></dl>

Arguments

Compute the voxel-to-RAS matrix from the geometry fields of a NIFTI v1 header. — nifti.header.to.vox2ras

<dl>

<dt>niiheader</dt>
<dd>named list, a NIFTI v1 header as returned by <code>read.nifti1.header</code>.</dd>

</dl>

nifti.header.to.vox2ras: Compute the voxel-to-RAS matrix from the geometry fields of a NIFTI v1 header.

Description

Usage

Value

Arguments