I’m not sure what you mean by “DVT machine”. Can you tell the name of manufacturer and model?
Most likely the machine exports DICOM images incorrectly. If you have a service contract then you should be able to report this to the manufacturer and they should fix it in a future software release. If you can share an anonymized or non-patient data set then we can give you the details about what should be changed exactly.
Some Dolphin CBCT machines use slice thickness field incorrectly, which results in similarly distorted images. Maybe your device has the same issue. This problem can be fixed by DICOM Patcher module:
- Install latest nightly version of Slicer (and use that for the next steps)
- Delete this data set from Slicer DICOM database (DICOM module)
- Use “DICOM Patcher” module on your data set, make sure “Generate slice position for multi-frame volumes” is enabled
- Re-import the data set into Slicer DICOM database