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[ENH] Add "ScanRAS" as an accepted coordinate frame for ieeg #866

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Sep 9, 2021
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[ENH] Add "ScanRAS" as an accepted coordinate frame for ieeg #866

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b6a763a
add ScanRAS as an accepted coordinate frame for ieeg
alexrockhill Sep 1, 2021
7efd9f7
recommendation for ACPC
alexrockhill Sep 1, 2021
244b490
Taylor comment
alexrockhill Sep 9, 2021
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9 changes: 9 additions & 0 deletions src/99-appendices/08-coordinate-systems.md
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Expand Up @@ -172,6 +172,15 @@ Restricted keywords for the `<CoordSysType>CoordinateSystem` field in the
[ACPC site](https://www.fieldtriptoolbox.org/faq/acpc/) on the FieldTrip
toolbox wiki.

- `ScanRAS`: The origin of the coordinate system is the center of the
gradient coil for the corresponding T1w image of the subject, and the x-axis
increases left to right, the y-axis increases posterior to to anterior and
the z-axis increases inferior to superior. For more information see the
[Nipy Documentation](https://nipy.org/nibabel/coordinate_systems.html). It is
strongly encouraged to align the subject's T1w to ACPC so that the `ACPC`
coordinate system can be used. If the subject's T1w in the BIDS dataset
is not aligned to ACPC, `ScanRAS` should be used.

- Any keyword from the list of
[Standard template identifiers](#standard-template-identifiers)

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1 change: 1 addition & 0 deletions src/schema/metadata/_iEEGCoordSys.yaml
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Expand Up @@ -3,4 +3,5 @@ type: string
enum:
- Pixels
- ACPC
- ScanRAS
- Other