# Basic question: Segmentation of CBCT with AMASSS extension

**URL:** <https://discourse.slicer.org/t/basic-question-segmentation-of-cbct-with-amasss-extension/32344>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [October 20, 2023, 2:10pm UTC](https://discourse.slicer.org/t/basic-question-segmentation-of-cbct-with-amasss-extension/32344 "2023-10-20T14:10:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![bellfounder](https://avatars.discourse-cdn.com/v4/letter/b/a4c791/32.png) [@bellfounder](https://discourse.slicer.org/u/bellfounder)\
**Post date:** [October 20, 2023, 2:10pm UTC](https://discourse.slicer.org/t/basic-question-segmentation-of-cbct-with-amasss-extension/32344/1 "2023-10-20T14:10:46Z")

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Operating system: MacOS 14.0  
Slicer version: 5.5.0  
Expected behavior: Get a segmented model  
Actual behavior: Being prompted to select a scan folder

 ![Bildschirmfoto 2023-10-20 um 12.09.15](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/b/d/bdfe59fdc5c30b4d0efd14c5785e2138991a3a0c.jpeg)

Hi everyone. Sorry if this is a stupid question. I tried to segment a CBCT file of the maxilla using the AMASSS extension. I set input type as DICOM and entered the correct folder. The model was also downloaded. See screenshot.

After hitting the ‘Run prediction’ button I get a prompt that I should select a scan folder. I thought that this is my DICOM file. What am I doing wrong?

Thanks a lot in advance!  
Best,  
Jörg

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [October 20, 2023, 4:28pm UTC](https://discourse.slicer.org/t/basic-question-segmentation-of-cbct-with-amasss-extension/32344/2 "2023-10-20T16:28:48Z")

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I have use it to segment a mandible by:

1. First, uploading the DICOM data to Slicer
2. Then, open the DICOM browser and load your CBCT
3. Then open AMASSS module and use it

Hope it helps

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**Author:** ![bellfounder](https://avatars.discourse-cdn.com/v4/letter/b/a4c791/32.png) [@bellfounder](https://discourse.slicer.org/u/bellfounder)\
**Post date:** [October 21, 2023, 1:46pm UTC](https://discourse.slicer.org/t/basic-question-segmentation-of-cbct-with-amasss-extension/32344/3 "2023-10-21T13:46:22Z")

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Thank you Mauro! I greatly appreciate your help which really helped me. I could now start the computing. Unfortunately, the processing seems to have gotten stuck (see image attached. Do you have any idea what ist the reason?

 ![Bildschirmfoto 2023-10-21 um 15.42.24](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/9/798e931aae43807b8e9d3842a931f6d9ad57ff86.jpeg)

Another question is: Tooth segmentation is greyed out. Is there a way to be able to have the teeth and roots be segmented? My special interest are the roots of the teeth.

 ![Bildschirmfoto 2023-10-21 um 16.04.19](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/a/6a501635bdb032691a50e8b9e24abe4aef6315b0.png)

Thanks again!  
Best, Jörg