nifti-zarr-schema-1.0.rc1.json

{
  "$schema": "http://json-schema.org/draft-06/schema",
  "$id": "https://raw.githubusercontent.com/neuroscales/nifti-zarr/main/nifti-zarr-schema-0.3.json",
  "title": "NIfTI-Zarr v0.3 - NIfTI header in JSON form",
  "type": "object",
  "properties": {
    "NIIHeaderSize": {
      "type": "integer"
    },
    "A75DataTypeName": {
      "type": "string"
    },
    "A75DBName": {
      "type": "string"
    },
    "A75Extends": {
      "type": "integer"
    },
    "A75SessionError": {
      "type": "integer"
    },
    "A75Regular": {
      "type": "integer"
    },
    "DimInfo": {
      "type": "object",
      "properties": {
        "Freq": {
          "enum": [
            0,
            1,
            2,
            3
          ]
        },
        "Phase": {
          "enum": [
            0,
            1,
            2,
            3
          ]
        },
        "Slice": {
          "enum": [
            0,
            1,
            2,
            3
          ]
        }
      }
    },
    "Dim": {
      "description": "Number of voxels for each dimension",
      "type": "array",
      "items": {
        "type": "integer",
        "minimum": 0
      },
      "minItems": 3,
      "maxItems": 5
    },
    "Param1": {
      "description": "First intent parameter",
      "type": [
        "number",
        "null"
      ]
    },
    "Param2": {
      "description": "Second intent parameter",
      "type": [
        "number",
        "null"
      ]
    },
    "Param3": {
      "description": "Third intent parameter",
      "type": [
        "number",
        "null"
      ]
    },
    "Intent": {
      "description": "Data intent or meaning",
      "enum": [
        "",
        "corr",
        "ttest",
        "ftest",
        "zscore",
        "chi2",
        "beta",
        "binomial",
        "gamma",
        "poisson",
        "normal",
        "ncftest",
        "ncchi2",
        "logistic",
        "laplace",
        "uniform",
        "ncttest",
        "weibull",
        "chi",
        "invgauss",
        "extval",
        "pvalue",
        "logpvalue",
        "log10pvalue",
        "estimate",
        "label",
        "neuronames",
        "matrix",
        "symmatrix",
        "dispvec",
        "vector",
        "point",
        "triangle",
        "quaternion",
        "unitless",
        "tseries",
        "elem",
        "rgb",
        "rgba",
        "shape",
        "fsl_fnirt_displacement_field",
        "fsl_cubic_spline_coefficients",
        "fsl_dct_coefficients",
        "fsl_quadratic_spline_coefficients",
        "fsl_topup_cubic_spline_coefficients",
        "fsl_topup_quadratic_spline_coefficients",
        "fsl_topup_field"
      ]
    },
    "DataType": {
      "description": "Data type, in numpy format",
      "type": "string"
    },
    "BitDepth": {
      "type": "integer"
    },
    "FirstSliceID": {
      "description": "First slice index",
      "type": "integer"
    },
    "VoxelSize": {
      "description": "Spacing between elements for each dimension",
      "type": "array",
      "items": {
        "type": "number",
        "minimum": 0
      },
      "minItems": 3,
      "maxItems": 5
    },
    "Orientation": {
      "description": "Handedness of the coordinate system",
      "type": "object",
      "properties": {
        "x": {
          "enum": [
            "r",
            "l",
            "a",
            "p",
            "i",
            "s"
          ]
        },
        "y": {
          "enum": [
            "r",
            "l",
            "a",
            "p",
            "i",
            "s"
          ]
        },
        "z": {
          "enum": [
            "r",
            "l",
            "a",
            "p",
            "i",
            "s"
          ]
        }
      }
    },
    "NIIByteOffset": {
      "type": "integer"
    },
    "ScaleSlope": {
      "description": "Intensity transform Slope",
      "type": "number"
    },
    "ScaleOffset": {
      "description": "Intensity transform offset",
      "type": "number"
    },
    "LastSliceID": {
      "description": "Last slice index",
      "type": "integer"
    },
    "SliceType": {
      "description": "A valid slice timing code (see table 4.6)",
      "enum": [
        "",
        "seq+",
        "seq-",
        "alt+",
        "alt-",
        "alt2+",
        "alt2-"
      ]
    },
    "Unit": {
      "description": "Space and time units",
      "type": "object",
      "properties": {
        "L": {
          "enum": [
            "",
            "m",
            "mm",
            "um"
          ]
        },
        "T": {
          "enum": [
            "",
            "s",
            "ms",
            "us"
          ]
        }
      }
    },
    "MaxIntensity": {
      "description": "Max display intensity",
      "type": "number"
    },
    "MinIntensity": {
      "description": "Min display intensity",
      "type": "number"
    },
    "SliceTime": {
      "description": "Time for 1 slice",
      "type": "number"
    },
    "TimeOffset": {
      "description": "Time axis shift",
      "type": "number"
    },
    "A75GlobalMax": {
      "type": "integer"
    },
    "A75GlobalMin": {
      "type": "integer"
    },
    "Description": {
      "description": "Any text you like",
      "type": "string",
      "maxLength": 80
    },
    "AuxFile": {
      "description": "Auxiliary filename",
      "type": "string",
      "maxLength": 24
    },
    "QForm": {
      "description": "A valid xform name (see table 4.5)",
      "enum": [
        "",
        "scanner_anat",
        "aligned_anat",
        "talairach",
        "mni_152",
        "template_other"
      ]
    },
    "SForm": {
      "description": "A valid xform name (see table 4.5)",
      "enum": [
        "",
        "scanner_anat",
        "aligned_anat",
        "talairach",
        "mni_152",
        "template_other"
      ]
    },
    "Quatern": {
      "properties": {
        "b": {
          "type": "number"
        },
        "c": {
          "type": "number"
        },
        "d": {
          "type": "number"
        }
      }
    },
    "QuaternOffset": {
      "properties": {
        "x": {
          "type": "number"
        },
        "y": {
          "type": "number"
        },
        "z": {
          "type": "number"
        }
      }
    },
    "Affine": {
      "description": "3x4 Matrix",
      "type": "array",
      "items": {
        "type": "array",
        "items": {
          "type": "number"
        },
        "minItems": 4,
        "maxItems": 4
      },
      "minItems": 3,
      "maxItems": 3
    },
    "Name": {
      "description": "'name' or meaning of data",
      "type": "string"
    },
    "NIIFormat": {
      "description": "NIfTI magic string",
      "enum": [
        "ni1",
        "n+1",
        "ni2",
        "n+2"
      ]
    },
    "NIFTIExtension": {
      "description": "Four bytes following header indicating the exist of extension",
      "items": {
        "type": "number"
      },
      "maxItems": 4,
      "minItems": 4,
      "type": "array"
    }
  }
}