mpib_sp_eeg/sub-36/eeg/sub-36_coordsystem.json

{
    "EEGCoordinateSystem": "CapTrak",
    "EEGCoordinateUnits": "m",
    "EEGCoordinateSystemDescription": "The X-axis goes from the left preauricular point (LPA) through the right preauricular point (RPA). The Y-axis goes orthogonally to the X-axis through the nasion (NAS). The Z-axis goes orthogonally to the XY-plane through the vertex of the head. This corresponds to a \"RAS\" orientation with the origin of the coordinate system approximately between the ears. See Appendix VIII in the BIDS specification.",
    "AnatomicalLandmarkCoordinates": {
        "NAS": [
            -1.0876634016696529e-17,
            0.10191899156732276,
            3.0814879110195774e-33
        ],
        "LPA": [
            -0.07694480356691545,
            8.21142806668303e-18,
            0.0
        ],
        "RPA": [
            0.09122769699975292,
            -9.735675924510731e-18,
            -3.0814879110195774e-33
        ]
    },
    "AnatomicalLandmarkCoordinateSystem": "CapTrak",
    "AnatomicalLandmarkCoordinateUnits": "m"
}