# Data format of the probabilistic segmentation map for UKF Tractography module?

**URL:** <https://discourse.slicer.org/t/data-format-of-the-probabilistic-segmentation-map-for-ukf-tractography-module/40730>\
**Category:** Support\
**Tags:** tractography\
**Created:** [December 17, 2024, 5:42pm UTC](https://discourse.slicer.org/t/data-format-of-the-probabilistic-segmentation-map-for-ukf-tractography-module/40730 "2024-12-17T17:42:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ilya\_Pshenichnyy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ilya_pshenichnyy/32/78894_2.png) [@Ilya\_Pshenichnyy](https://discourse.slicer.org/u/Ilya_Pshenichnyy)\
**Post date:** [December 17, 2024, 5:42pm UTC](https://discourse.slicer.org/t/data-format-of-the-probabilistic-segmentation-map-for-ukf-tractography-module/40730/1 "2024-12-17T17:42:46Z")

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I have been trying to use Option 2 in Seeding Options ( [Documentation/Nightly/Modules/UKFTractography - Slicer Wiki](https://www.slicer.org/wiki/Documentation/Nightly/Modules/UKFTractography)). I used Tracula generated probability distribution volume, normalized it to have 0 to 1 values as the documentation requires and tried float32 and uint8 +importing it as nii.gz and as .nrrd. Regardless, UKF tractography module outputs “Unsupported data type for seed file!”. Unfortunately, i could not find any requirements for data format in the module’s documentation.