# How to create ECV mapps with 3D slicer 

**URL:** <https://discourse.slicer.org/t/how-to-create-ecv-mapps-with-3d-slicer/44936>\
**Category:** Support\
**Created:** [November 1, 2025, 7:45pm UTC](https://discourse.slicer.org/t/how-to-create-ecv-mapps-with-3d-slicer/44936 "2025-11-01T19:45:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Nara](https://avatars.discourse-cdn.com/v4/letter/n/e5b9ba/32.png) [@Nara](https://discourse.slicer.org/u/Nara)\
**Post date:** [November 1, 2025, 7:45pm UTC](https://discourse.slicer.org/t/how-to-create-ecv-mapps-with-3d-slicer/44936/1 "2025-11-01T19:45:57Z")

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Hello,

I need to use 3D slicer to create ECV map, but when I try to import DICOM files (on a CD), and use the T1 ECV Mapping extension, I can’t find and upload the imput volumes!! Do I need the internet to do so? Or is there another problem with the extension?

Thank you.

Nawel