Sign of markup point coordinates

Support
1

When selecting coordinate points in 3D Slicer software, you can see the specific values on the RSA axis. According to my observation, usually the RA axis is negative, while the S axis is positive, but in the output fscv file, all the three-dimensional coordinates have become positive numbers. How can I solve this problem.

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Operating system:
Slicer version:5.7.0
Expected behavior:
Actual behavior:

2

Internally 3D Slicer represents data in RAS coordinate system.

When data is saved to file, it is written in LPS coordinates, so the first two components are multiplied by -1.