# Automated Dental Tools ALI fail

**URL:** <https://discourse.slicer.org/t/automated-dental-tools-ali-fail/43059>\
**Category:** Support\
**Created:** [May 23, 2025, 11:07am UTC](https://discourse.slicer.org/t/automated-dental-tools-ali-fail/43059 "2025-05-23T11:07:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![eric6](https://avatars.discourse-cdn.com/v4/letter/e/8e7dd6/32.png) [@eric6](https://discourse.slicer.org/u/eric6)\
**Post date:** [May 23, 2025, 11:07am UTC](https://discourse.slicer.org/t/automated-dental-tools-ali-fail/43059/1 "2025-05-23T11:07:45Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/b/7/b7f0acb14d01b95b19ab7f15113e31f854ce5840.png)  
Been trying to run ALI on 5.2.2 but this “ModuleNotFoundError: No module named ‘pydicom.pixels’” keeps popping up. Also tried 5.4.0, 5.6.1, and 5.8.1 and different kinds of error messages appeared. Any fixes to this?

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<div class="post-metadata">

**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [May 23, 2025, 4:02pm UTC](https://discourse.slicer.org/t/automated-dental-tools-ali-fail/43059/2 "2025-05-23T16:02:31Z")

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xref conversation regarding `pydicom.pixels` compatibility issue:

> <https://github.com/DCBIA-OrthoLab/SlicerAutomatedDentalTools/issues/136>
>
> I was trying to run ALI on 5.2.2 but failed due to the error described in the to…pic. Any fixes to this?
> 
> \[VTK\] ALI\_CBCT standard error:
> \[VTK\] Traceback (most recent call last):
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\NA-MIC\\Extensions-31382\\SlicerAutomatedDentalTools\\lib\\Slicer-5.2\\cli-modules\\ALI\_CBCT.py", line 59, in \<module\>
> \[VTK\] import dicom2nifti
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\\_\_init\_\_.py", line 19, in \<module\>
> \[VTK\] from dicom2nifti.convert\_dicom import dicom\_series\_to\_nifti
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\convert\_dicom.py", line 17, in \<module\>
> \[VTK\] import dicom2nifti.common as common
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\common.py", line 16, in \<module\>
> \[VTK\] from pydicom.pixels import apply\_modality\_lut
> \[VTK\] ModuleNotFoundError: No module named 'pydicom.pixels'
> \[VTK\] 
> \[VTK\] During handling of the above exception, another exception occurred:
> \[VTK\] 
> \[VTK\] Traceback (most recent call last):
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\NA-MIC\\Extensions-31382\\SlicerAutomatedDentalTools\\lib\\Slicer-5.2\\cli-modules\\ALI\_CBCT.py", line 62, in \<module\>
> \[VTK\] import dicom2nifti
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\\_\_init\_\_.py", line 19, in \<module\>
> \[VTK\] from dicom2nifti.convert\_dicom import dicom\_series\_to\_nifti
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\convert\_dicom.py", line 17, in \<module\>
> \[VTK\] import dicom2nifti.common as common
> \[VTK\] File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\common.py", line 16, in \<module\>
> \[VTK\] from pydicom.pixels import apply\_modality\_lut
> \[VTK\] ModuleNotFoundError: No module named 'pydicom.pixels'
> \[VTK\] ALI\_CBCT completed with errors
> 
> 
> ========= PROCESSED ========= 
> 
> ALI\_CBCT standard output:
> 
> No module named 'logic'
> 
> \[notice\] A new release of pip is available: 23.0 -\> 25.1.1
> \[notice\] To update, run: python-real.exe -m pip install --upgrade pip
> 
> 
> 
> ========= ERROR ========= 
> 
> CLI execution failed: 
>  
> ALI\_CBCT standard error:
> 
> Traceback (most recent call last):
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\NA-MIC\\Extensions-31382\\SlicerAutomatedDentalTools\\lib\\Slicer-5.2\\cli-modules\\ALI\_CBCT.py", line 59, in \<module\>
> import dicom2nifti
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\\_\_init\_\_.py", line 19, in \<module\>
> from dicom2nifti.convert\_dicom import dicom\_series\_to\_nifti
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\convert\_dicom.py", line 17, in \<module\>
> import dicom2nifti.common as common
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\common.py", line 16, in \<module\>
> from pydicom.pixels import apply\_modality\_lut
> ModuleNotFoundError: No module named 'pydicom.pixels'
> 
> During handling of the above exception, another exception occurred:
> 
> Traceback (most recent call last):
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\NA-MIC\\Extensions-31382\\SlicerAutomatedDentalTools\\lib\\Slicer-5.2\\cli-modules\\ALI\_CBCT.py", line 62, in \<module\>
> import dicom2nifti
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\\_\_init\_\_.py", line 19, in \<module\>
> from dicom2nifti.convert\_dicom import dicom\_series\_to\_nifti
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\convert\_dicom.py", line 17, in \<module\>
> import dicom2nifti.common as common
> File "C:\\Users\\echau\\AppData\\Local\\NA-MIC\\Slicer 5.2.2\\lib\\Python\\Lib\\site-packages\\dicom2nifti\\common.py", line 16, in \<module\>
> from pydicom.pixels import apply\_modality\_lut
> ModuleNotFoundError: No module named 'pydicom.pixels'