View MetaImage files in your browser
The Insight Toolkit's own image format, common in research and in medical AI datasets. Open a volume right here and step through it in every plane. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your scan opens slice by slice, with its series or planes beside it, what the scanner says in its corners and the patient's sides at its edges.
- Every series in order through the body • The wheel steps through it
- Window and level • Drag it, or pick CT's presets
- Measure lengths, angles and areas in millimeters
- Export • PNG, JPEG, MP4, or the files without patient data
About MetaImage
MetaImage comes from Kitware's Insight Toolkit, ITK, the library under 3D Slicer, ITK-SNAP and Elastix. Research datasets and image analysis challenges ship CT and MRI volumes in it, most often as .mha.
A MetaImage starts with a few lines of text, like NDims, DimSize, ElementSpacing and ElementType, then its voxels, raw or compressed with zlib. An .mha holds both in one file, and an .mhd header names a .raw or .zraw file beside it.
Filepeek reads it in your browser and cuts the volume into axial, coronal and sagittal slices, placed by its TransformMatrix, with the patient's sides at the edges. Step through with the wheel or the arrow keys, set the window and level, measure in millimeters, read the header, and save a slice as PNG or JPEG or a plane as MP4.
MetaImage
.mha • .mhd
Format
- MIME type
- application/x-metaimage
- Made by
- Kitware, for ITK
Inside the file
- Header
- Text, a key and a value a line
- Voxels
- 8 to 64 bit, integer or float
- Packing
- Raw, or compressed with zlib
- Data
- In the file for .mha, beside it for .mhd
Opens in every browser
Browsers download MetaImage files. Filepeek opens them in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I open an .mhd file?
Drop the .mhd together with the .raw or .zraw file it names. Filepeek reads the header, then the voxels beside it.
Which planes can I see?
All three: axial, coronal and sagittal, each listed beside the image. Pick one and step through its slices with the wheel, the arrow keys or the slider.
Can I save a slice as a picture?
Yes. Choose Export to save the slice on show as PNG or JPEG, as it looks with the window you set, or a whole plane as an MP4.
Is my scan uploaded?
No. It opens inside your browser and never leaves your device.