{
 "id": "nii",
 "name": "NII",
 "category": "scientific",
 "identifiers": {
  "extensions": [
   "nii",
   "nii.gz"
  ],
  "puid": [
   "fmt/1094"
  ],
  "wikidata": [
   "Q28777714"
  ],
  "magic": [
   {
    "offset": 4,
    "hex": "6e6932000d0a1a0a",
    "notes": "The Neuroimaging Informatics Technology Initiative File Format V2 variant1"
   },
   {
    "offset": 4,
    "hex": "6e2b32000d0a1a0a",
    "notes": "The Neuroimaging Informatics Technology Initiative File Format V2 variant2"
   }
  ],
  "signatures": [
   {
    "name": "The Neuroimaging Informatics Technology Initiative File Format V2 variant1",
    "sequences": [
     {
      "position": "bof",
      "offset": 4,
      "pattern": "6e6932000d0a1a0a"
     }
    ]
   },
   {
    "name": "The Neuroimaging Informatics Technology Initiative File Format V2 variant2",
    "sequences": [
     {
      "position": "bof",
      "offset": 4,
      "pattern": "6e2b32000d0a1a0a"
     }
    ]
   }
  ]
 },
 "status": "writable",
 "summary": "A Neuroimaging format commonly used in medical industry for the analysis of MRI data. Version 2 is an extended version of NIfTI allowing 64 bit storage and addressing.",
 "tools": [
  {
   "name": "AFNI",
   "url": "http://afni.nimh.nih.gov/afni/",
   "reads": true,
   "writes": false,
   "license": "GNU General Public License",
   "open_source": true
  },
  {
   "name": "BrainVoyager",
   "url": "http://www.brainvoyager.com/products/brainvoyager.html",
   "reads": true,
   "writes": false
  },
  {
   "name": "CARET",
   "url": "http://brainvis.wustl.edu/",
   "reads": true,
   "writes": false
  },
  {
   "name": "FreeSurfer",
   "url": "http://www.freesurfer.net/",
   "reads": true,
   "writes": false,
   "license": "open-source license",
   "open_source": true
  },
  {
   "name": "Insight Segmentation and Registration Toolkit",
   "url": "http://www.itk.org/",
   "reads": true,
   "writes": false,
   "license": "Apache Software License 2.0",
   "open_source": true
  },
  {
   "name": "Mango",
   "url": "http://ric.uthscsa.edu/mango/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "Visualization Toolkit",
   "url": "http://www.vtk.org/",
   "reads": true,
   "writes": true,
   "license": "3-clause BSD License",
   "open_source": true
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/NII",
   "kind": "wiki"
  },
  {
   "name": "PRONOM fmt/1094",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/1094",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q28777714",
   "url": "https://www.wikidata.org/wiki/Q28777714",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "version": "2",
 "aliases": [
  "NIfTI-2"
 ],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}