neuroim2 (version 0.8.5)

MetaInfo: Create Neuroimaging Metadata Object

Description

Creates a MetaInfo object containing essential metadata for neuroimaging data, including dimensions, spacing, orientation, and data type information.

Usage

MetaInfo(
  Dim,
  spacing,
  origin = rep(0, length(spacing)),
  data_type = "FLOAT",
  label = "",
  spatial_axes = OrientationList3D$AXIAL_LPI,
  additional_axes = NullAxis
)

Value

A MetaInfo object

Arguments

Dim

Integer vector. Image dimensions (e.g., c(64, 64, 32) for 3D).

spacing

Numeric vector. Voxel dimensions in mm.

origin

Numeric vector. Coordinate origin. Default is zero vector.

data_type

Character. Data type (e.g., "FLOAT", "SHORT"). Default is "FLOAT".

label

Character. Image label(s). Default is "".

spatial_axes

Object. Spatial orientation. Default is OrientationList3D$AXIAL_LPI.

additional_axes

Object. Non-spatial axes. Default is NullAxis.

Details

Create MetaInfo Object

The MetaInfo object is fundamental for:

• Spatial interpretation of image data

• Data type handling and conversion

• Memory allocation and mapping

• File I/O operations

Input validation ensures:

• Dimensions are positive integers

• Spacing values are positive

• Origin coordinates are finite

• Data type is supported

See Also

NIFTIMetaInfo, AFNIMetaInfo

Examples

# Create metadata for 3D structural MRI
meta <- MetaInfo(
  Dim = c(256, 256, 180),
  spacing = c(1, 1, 1),
  data_type = "FLOAT",
  label = "T1w"
)

# Get image dimensions
dim(meta)

# Get transformation matrix
trans(meta)