fsl.data.constants¶
This module defines some constant values used throughout fslpy.
The following constants relate to the orientation of an axis, in either voxel or world space:
The axis goes from left to right. |
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The axis goes from right to left. |
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The axis goes from posterior to anterior. |
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The axis goes from anterior to posterior. |
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The axis goes from inferior to superior. |
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The axis goes from superior to inferior. |
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The axis has an unknown orientation. |
These constants relate to the space in which a NIFTI image is assumed to be (i.e. the transformed coordinate space); they are defined in the NIFTI specification:
Arbitrary coordinates. |
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Scanner-based anatomical coordinates. |
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Coordinates aligned to another file’s, or to anatomical “truth”. |
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Coordinates aligned to Talairach-Tournoux Atlas; (0,0,0)=AC, etc. |
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MNI 152 normalized coordinates. |
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fsl.data.constants.ORIENT_L2R= 0¶ The axis goes from left to right.
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fsl.data.constants.ORIENT_R2L= 1¶ The axis goes from right to left.
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fsl.data.constants.ORIENT_P2A= 2¶ The axis goes from posterior to anterior.
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fsl.data.constants.ORIENT_A2P= 3¶ The axis goes from anterior to posterior.
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fsl.data.constants.ORIENT_I2S= 4¶ The axis goes from inferior to superior.
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fsl.data.constants.ORIENT_S2I= 5¶ The axis goes from superior to inferior.
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fsl.data.constants.ORIENT_UNKNOWN= -1¶ The axis has an unknown orientation.
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fsl.data.constants.NIFTI_XFORM_UNKNOWN= 0¶ Arbitrary coordinates.
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fsl.data.constants.NIFTI_XFORM_SCANNER_ANAT= 1¶ Scanner-based anatomical coordinates.
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fsl.data.constants.NIFTI_XFORM_ALIGNED_ANAT= 2¶ Coordinates aligned to another file’s, or to anatomical “truth”.
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fsl.data.constants.NIFTI_XFORM_TALAIRACH= 3¶ Coordinates aligned to Talairach-Tournoux Atlas; (0,0,0)=AC, etc.
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fsl.data.constants.NIFTI_XFORM_MNI_152= 4¶ MNI 152 normalized coordinates.
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fsl.data.constants.NIFTI_XFORM_ANALYZE= 5¶ Code which indicates that this is an ANALYZE image, not a NIFTI image.