Multi-Planar Reconstruction

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Permute and flip the matrix of an input image or mask as needed to obtain an approximation to Axial, Coronal and Sagittal orientations in radiological and neurological conventions.

In the neurological convention, left in the patient is left in the image, and in the radiological convention left in the patient is right in the image.

Position, orientation and voxel size are modified to reflect the shifts in the image matrix. The physical coordinate of each voxel will remain unchanged, but the order of the stored voxels may change.

In oblique images, the closest permutation to the selected projection will be returned.

Note that there is no resampling of the image matrix, only a reordering of the data.

Inputs

Input

The input Image or Mask to be reoriented.

Type: Image, Mask, List, Required, Single

Outputs

Output

The reoriented Image or Mask with updated orientation metadata. Pixel values are unchanged, but their ordering may differ.

Type: Image, Mask

Settings

Orientation Selection

Set the desired coordinate orientation for the output image. If “Custom Orientation Code…” is selected, you can manually specify the desired orientation using a 3-character code corresponding to the direction of the image axes:

The code must follow DICOM orientation conventions: Each character defines the positive direction of an anatomical axis:

R/L: Right/Left

A/P: Anterior/Posterior

I/S: Inferior/Superior

For example:

LPS: Left–Posterior–Superior (neurological default)

RAS: Right–Anterior–Superior (radiological default)

IPL: Inferior–Posterior–Left

The first character corresponds to the i-axis, the second to the j-axis, and the third to the k-axis in the image’s physical space.

Invalid or ambiguous codes will cause an error.

Values: Ax/Tra (Radiological), Ax/Tra (Neurological), Coronal (Radiological), Coronal (Neurological), Sagittal (A->P), Sagittal (P->A), Custom Orientation Code…