build.mrtrix.header.stable

The length of the header determines the data offset that is
stored inside the header, so the two have to be reconciled: the offset is
written with a number of digits that depends on its own value, which can
change the length of the header. Starting from an offset guess and
recomputing until it is stable always terminates, since the length only
ever grows with the number of digits and that number is bounded.

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) 

build.mrtrix.header.stable function

<dl><dt>header_id</dt>
<dd>character string, the file type identifier, one of 'mrtrix
tracks' (TCK) or 'mrtrix track scalars' (TSF).</dd>
<dt>entries</dt>
<dd>named list of additional header entries.</dd>
<dt>datatype</dt>
<dd>character string, the datatype.</dd>
<dt>count</dt>
<dd>integer, the number of streamlines.</dd></dl>

Arguments

Determine the length of an MRtrix streamlines header. — build.mrtrix.header.stable

<dl>

<dt>header_id</dt>
<dd>character string, the file type identifier, one of 'mrtrix
tracks' (TCK) or 'mrtrix track scalars' (TSF).</dd>


<dt>entries</dt>
<dd>named list of additional header entries.</dd>


<dt>datatype</dt>
<dd>character string, the datatype.</dd>


<dt>count</dt>
<dd>integer, the number of streamlines.</dd>

</dl>

build.mrtrix.header.stable: Determine the length of an MRtrix streamlines header.

Description

Usage

Value

Arguments