# Unable to import Brainlab SEG to Slicer

**URL:** <https://discourse.slicer.org/t/unable-to-import-brainlab-seg-to-slicer/30684>\
**Category:** Support\
**Created:** [July 19, 2023, 4:34pm UTC](https://discourse.slicer.org/t/unable-to-import-brainlab-seg-to-slicer/30684 "2023-07-19T16:34:56Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 21, 2023, 4:55am UTC](https://discourse.slicer.org/t/unable-to-import-brainlab-seg-to-slicer/30684/2 "2023-07-21T04:55:20Z")

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It’s great that you find useful for analyzing your surgeries using Slicer.

Importing of the DICOM Segmentation object fails due to this error (shown in application log in Slicer):

```auto
ERROR: No sufficient information to derive slice spacing! Unable to interpret the data.
Fatal error encountered.

```

This is a known error in BrainLab’s software. See solution for fixing the DICOM data set here:

> [@Unable to load DICOM segmentation - missing slice thickness](https://discourse.slicer.org/t/unable-to-load-dicom-segmentation-missing-slice-thickness/23737):
>
> I’m unable to load a DICOM segmentation. The segmentation was created by the Brainlab Curve navigation system in the AMIGO suite. I unfortunately cannot share the file. Tested on the latest preview version (version 5.1.0, revision 30987, built 2022-06-02) and the stable release. I was tempted to ignore this and just assume that the file was faulty, but: this was the case for more than one file I could open the segmentation with other software ([ImFusion Suite Demo Version](https://www.imfusion.com/resources/download) to be specific) T…

@fedorov do you know if they have fixed this in later BrainLab software versions?

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_[View the full topic](https://discourse.slicer.org/t/unable-to-import-brainlab-seg-to-slicer/30684)._