NiftiOrientation

struct NiftiOrientation

Orientation metadata for NIfTI output files.

Bundles direction cosines (in RAS convention), voxel sizes, and position offset. When valid is false the NIFTI writer falls back to identity orientation with 1 mm isotropic voxels.

Variables

Name	Description
voxel_size	3x3 direction cosine matrix (RAS convention).
position	Position offset in mm (RAS) of the first voxel.
valid	True when this struct contains valid orientation data.

Variable Details

position

float position[3]

Position offset in mm (RAS) of the first voxel.

valid

bool valid

True when this struct contains valid orientation data.

voxel_size

float voxel_size[3]

3x3 direction cosine matrix (RAS convention). Columns = read, phase, slice directions. dircos[row][col]: row = x/y/z output axis, col = read/phase/slice. Voxel dimensions in mm along read, phase, and slice directions.