Every upload is checked on the server before it is kept, and stored byte for byte with its SHA-256 fingerprint. How each format opens:
| Format | Opens as |
|---|---|
| DICOM / DICONDE, uncompressedLittle or big endian, 8 to 16-bit. The usual "save as DICONDE" from panel software. | Original, full quality |
| DICOM / DICONDE, DeflateZip-compressed dataset. Lossless. | Original, full quality |
| JPEG LosslessProcess 14 and SV1. A common compressed archive format. Lossless. | Original, full quality |
| JPEG-LS losslessLossless. | Original, full quality |
| JPEG 2000 losslessReversible wavelet. Lossless. | Original, full quality |
| RLERun-length. Lossless. | Original, full quality |
| TIFF, 8 or 16-bit greyscaleUncompressed, LZW, Deflate or PackBits. Pixel size read from the file when it is there. | Original, full quality |
| JPEG-LS near-losslessSmall, bounded changes to pixel values. Shown with an amber "lossy compressed original" badge. | Opens, flagged lossy |
| JPEG 2000 lossyIrreversible wavelet. Flagged on the image. | Opens, flagged lossy |
| JPEG Baseline (8-bit) in DICONDELossy and 8-bit. Opens with the amber badge; fine detail may already have been changed by the panel software. | Opens, flagged lossy |
| JPEG, PNG, GIF or BMP picturesA "save as picture" export, not the original radiograph: 8-bit, usually already windowed, no pixel size. Opens with a red "picture only" badge, sizes in pixels, and no ISO 17636-2 checks. | Opens as picture only |
| JPEG Extended (12-bit) in DICONDEThe message names the format. Export uncompressed or JPEG Lossless instead. | Not supported yet |
| HTJ2KHigh-throughput JPEG 2000. The message names the format. | Not supported yet |
Original, full quality: decoded pixel for pixel, measured in millimetres from the pixel spacing in the file. Flagged lossy: the panel software already compressed it with loss, so an amber badge stays on the image, the report and any export. Picture only: a red badge, sizes in pixels, no image-quality pass or fail; the AI assistant is told it is a picture.