# How to measure the mandibular condyle morphological changes between two time different points CT?

**URL:** <https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677>\
**Category:** SlicerSALT\
**Tags:** registration\
**Created:** [October 13, 2022, 11:44am UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677 "2022-10-13T11:44:06Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![wael\_telha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/wael_telha/32/16914_2.png) [@wael\_telha](https://discourse.slicer.org/u/wael_telha)\
**Post date:** [October 13, 2022, 11:44am UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/1 "2022-10-13T11:44:06Z")

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Hi 3D Slicer users,  
I am currently conducting a research to measure the mandibular condyle morphological changes between two time-different points CT:  
I tried to use SPHARM-PDM to achieve this goal but it is not working as immediately “terminated with error” message appeared!  
So, is there any other module in the program that can be used to measure this?  
If any one used SPHARM before please to share his/her experience

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**Author:** ![SAO](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sao/32/16036_2.png) [@SAO](https://discourse.slicer.org/u/SAO)\
**Post date:** [November 1, 2022, 6:05am UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/2 "2022-11-01T06:05:43Z")

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Hi @wael_telha

Listed below direct link to the SlicerSALT tutorial (modules 1 to 4):  
https://player.vimeo.com/video/412300712?h=b9de710cae&app_id=122963  
https://player.vimeo.com/video/412356243?h=2a56b19bde&app_id=122963  
https://player.vimeo.com/video/412373481?h=e19a2ccf66&app_id=122963  
https://player.vimeo.com/video/412382491?h=047b0deaf5&app_id=122963

These were helpful when dealing with SHARPM-PDM pipelines, and SlicetSALT in general.

All the best.  
Sultan

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**Author:** ![wael\_telha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/wael_telha/32/16914_2.png) [@wael\_telha](https://discourse.slicer.org/u/wael_telha)\
**Post date:** [November 14, 2022, 1:15pm UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/3 "2022-11-14T13:15:25Z")

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thanks a million . i appreciate your help and support

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**Author:** ![SAO](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sao/32/16036_2.png) [@SAO](https://discourse.slicer.org/u/SAO)\
**Post date:** [November 14, 2022, 2:53pm UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/4 "2022-11-14T14:53:09Z")

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You are welcome @wael_telha

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**Author:** ![wael\_telha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/wael_telha/32/16914_2.png) [@wael\_telha](https://discourse.slicer.org/u/wael_telha)\
**Post date:** [November 23, 2022, 11:36am UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/5 "2022-11-23T11:36:46Z")

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Dear Sultan ,  
hi  
Once again I need your help regarding the method to quantification of the changes using a color map  
I am using Slicer 4.11

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**Author:** ![SAO](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sao/32/16036_2.png) [@SAO](https://discourse.slicer.org/u/SAO)\
**Post date:** [January 18, 2023, 7:51am UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/7 "2023-01-18T07:51:28Z")

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Dear @wael_telha ,  
Sorry for the late response - for some reason I did not get any notification regarding your message.

_Normally - we do the following:_

1. Establish correspondence-between the models (of all groups), then
2. Generate a mean for each group (using principal-component analysis module), then
3. Compare the means of each group (with the same color map) - through the model-to-model distance module.

I am always happy to share my knowledge regarding this.  
**Please specify the issue you are facing, and the aim.**

Try to use the latest release of [SlicerSALT 4.0.1](https://discourse.slicer.org/t/slicersalt-4-0-1-summary-highlights-and-changelog/26197)

Regards,  
Sultan

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**Author:** ![anasmh101](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/anasmh101/32/80621_2.png) [@anasmh101](https://discourse.slicer.org/u/anasmh101)\
**Post date:** [July 12, 2025, 1:58pm UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677/8 "2025-07-12T13:58:00Z")

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Hello, I have a question I couldn’t find an answer for in the videos:  
When performing PCA, which SPHARM-PDM output VTK files should be used to generate the CSV file — the `_pp_surf_SPHARM.vtk` files or the `_pp_surf_SPHARM_ellalign.vtk` files?