Label a defect once. Prove it for the life of the part.
Nitsor is 3D annotation software for industrial CT. Your inspectors mark porosity, cracks, inclusions and delamination on the volume itself. Every mark is measured in millimetres, carries the name of whoever drew it, and belongs to a release someone outside your company can check.
Me 163 V5 · z 192
0.33 mm in planereal scan
What an inspector gets
Sizes in millimetres, not pixels
A pore is measured in cubic millimetres, because the software knows the voxel size, the size of one 3D pixel in the volume. That is a number you can put in a report.
One record for each part
Serial number, scan settings, who inspected it, who signed it off, and every change since. Nothing is overwritten, so last year's call is still readable.
A release an auditor can check
Export the labels with a hash chain. Your customer, or whoever audits you, can confirm the export is unchanged without ever receiving the scans.
How a part moves through it
- 01 · register
Point at the scan
The volume stays on your file server or in your own object storage. Nitsor keeps an index, a hash and the scan settings.
- 02 · label
Mark the defect in 3D
Brush across slices or grow a region from one seed. Porosity, shrinkage, cracks, inclusions, delamination where the layers of a composite come apart, and lack of fusion in a weld.
- 03 · review
A second inspector signs
The reviewer sees what changed in millimetres and counts, accepts or rejects, and the rejection stays on the record.
- 04 · release
Freeze it and hand it over
A release names the data it came from, the label list in force, and the people involved. It carries its own proof.
Formats and connections
| Topic | What it takes |
|---|---|
| Volumes in | DICOM from the bench, uncompressed. The scan settings survive the import, so a measurement on screen is a real distance in millimetres. |
| What comes out | A release: one file with the label events in order, the people behind them and a hash chain. Your customer checks it without your scans and without an account here. |
| Where the data sits | Your own S3-compatible storage. The browser reads only the bytes it needs, through a signed link that expires. We keep no copy. |
| Automation | A model can propose defects. Nothing is saved until a person accepts, unless the error rate for that class has been measured on cases the model never saw. |
| Who can write | Your inspectors, your models and your agents, each with a named account and limits you set. The record tells them apart. |
| Rejections | A rejected mark is an entry, not a deletion. It stays visible with the reason and the name, which is the part an auditor asks about. |
The worked example on this site
Every CT picture on this site comes from one published scan: a subvolume of a Messerschmitt Me 163 airframe, scanned on the Fraunhofer EZRT XXL-CT rig. It is a good stand-in for a large industrial part. Thin skin, riveted joints, ring frames, brackets and fasteners, all in one 512-slice volume.
We sampled every eighth slice, 64 frames in all, and drew the dataset's own instance labels over them. The outlines you see in the stack on the home page are those labels, not a drawing. Bring your own castings or composites and we will run the same walk on them.
Fraunhofer EZRT XXL-CT Instance Segmentation, subvolume V5. CC BY 4.0, doi:10.5281/zenodo.10651746. The instance names are ours.
z 96 real scan 
z 288 real scan 
z 448 real scan
- Slices
- 512
- In plane
- 0.33 mm
- Between slices
- 0.6 mm
- Labelled instances
- 168 in 64 frames
- Licence
- CC BY 4.0
- Source
- Fraunhofer EZRT
What your quality manager gets, and what they do not
A release is evidence you attach to an inspection report. It is not the report. It says which scan, which label list, who drew each mark, who accepted it and when, and it carries a hash chain so a customer auditor can check the file has not been edited since you cut it. They check it on their own machine, with no account here and no access to your scans.
We make no claim about any standard or certification. If you report against one, tell us which on the call and we will say plainly whether we help. Nitsor never decides whether a part passes.