# Generating thickness map

**URL:** <https://discourse.slicer.org/t/generating-thickness-map/34852>\
**Category:** Support\
**Created:** [March 12, 2024, 10:06pm UTC](https://discourse.slicer.org/t/generating-thickness-map/34852 "2024-03-12T22:06:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Pol](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pol/32/67307_2.png) [@Pol](https://discourse.slicer.org/u/Pol)\
**Post date:** [March 12, 2024, 10:06pm UTC](https://discourse.slicer.org/t/generating-thickness-map/34852/1 "2024-03-12T22:06:07Z")

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I used the following method to generate a thickness ma of the left ventricular myocardium:

- Compute medial surface using **Simple Filters module - BinaryThinningImageFilter**.
- Compute distance map using **Simple Filters module - DanielssonDistanceMapImageFilter**. Input is binary: Yes; Use image spacing: Yes.
- Copy distance values from the distance map to model node using **Probe volume with model** module.

In the last step (probe volume with model) there is an error message asking for the input model. What is the correct input model?

Thank you!

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**Author:** ![Jennifer\_Ortiz](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jennifer_ortiz/32/68878_2.png) [@Jennifer\_Ortiz](https://discourse.slicer.org/u/Jennifer_Ortiz)\
**Post date:** [March 13, 2024, 6:09pm UTC](https://discourse.slicer.org/t/generating-thickness-map/34852/2 "2024-03-13T18:09:25Z")

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Hey! I have also been making thickness maps and I found that for **Probe Volume with Model in modules:**

the Input Volume: DanielsonDistanceMapImageFilter output  
the Input Model: Original model stl

This works for me and I hope that this helps!