# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=40

[Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md)

**Page:** 41

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## [PyTomography Extension](https://discourse.slicer.org/t/pytomography-extension/41951)

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**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 6\
**Last updated:** [May 18, 2025, 2:28pm UTC](https://discourse.slicer.org/t/pytomography-extension/41951 "2025-05-18T14:28:22Z")

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Dear expert, There is no PyTomography Extension in 3D Slicer version 5.8.1. Please help me add it. Thank you.

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## [Identify HU range for Air on CT image](https://discourse.slicer.org/t/identify-hu-range-for-air-on-ct-image/42950)

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**Author:** [@imbeatriz](https://discourse.slicer.org/u/imbeatriz)\
**Replies:** 10\
**Last updated:** [May 18, 2025, 1:24pm UTC](https://discourse.slicer.org/t/identify-hu-range-for-air-on-ct-image/42950 "2025-05-18T13:24:46Z")

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Hi everyone, I used TotalSegmentator on a CT image, and it successfully segmented all relevant structures. However, I noticed that it does not include a specific label for air that I need. I need to determine the HU ra…

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## [How to set the parameters of N4ITK MRI Bias Correction?](https://discourse.slicer.org/t/how-to-set-the-parameters-of-n4itk-mri-bias-correction/42988)

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**Author:** [@cui](https://discourse.slicer.org/u/cui)\
**Replies:** 0\
**Last updated:** [May 18, 2025, 11:42am UTC](https://discourse.slicer.org/t/how-to-set-the-parameters-of-n4itk-mri-bias-correction/42988 "2025-05-18T11:42:33Z")

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What does BSpine grid resolution represent? Does it represent Pixel Spacing? If the image Pixel Spacing is 138×138×138 mm, should the BSpine grid resolution be set to 138×138×138 when performing N4ITK MRI Bias Correction…

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## [Pytorch remote code execution vulnerability](https://discourse.slicer.org/t/pytorch-remote-code-execution-vulnerability/42730)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 1\
**Last updated:** [May 18, 2025, 10:56am UTC](https://discourse.slicer.org/t/pytorch-remote-code-execution-vulnerability/42730 "2025-05-18T10:56:45Z")

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FYI: https://github.com/advisories/GHSA-53q9-r3pm-6pq6

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## [FYI: Extensions are being built for Mac only for SlicerStable](https://discourse.slicer.org/t/fyi-extensions-are-being-built-for-mac-only-for-slicerstable/42983)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 0\
**Last updated:** [May 17, 2025, 6:45pm UTC](https://discourse.slicer.org/t/fyi-extensions-are-being-built-for-mac-only-for-slicerstable/42983 "2025-05-17T18:45:47Z")

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Since a few weeks, extensions were not being built for Linux (SlicerStable). Since today, they are built for Mac only. Moreover, for SlicerVMTK in particular, the build fails seemingly due to corrupt files retrieved fro…

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## [Is there a quick method to segment epicardial fat in a standard chest CT?](https://discourse.slicer.org/t/is-there-a-quick-method-to-segment-epicardial-fat-in-a-standard-chest-ct/42982)

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**Author:** [@huancun](https://discourse.slicer.org/u/huancun)\
**Replies:** 0\
**Last updated:** [May 17, 2025, 2:02pm UTC](https://discourse.slicer.org/t/is-there-a-quick-method-to-segment-epicardial-fat-in-a-standard-chest-ct/42982 "2025-05-17T14:02:45Z")

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I’m currently using the threshold-based outlining tool in 3D Slicer, but I have to do it slice by slice, which is very time-consuming. Is there a faster method to segment epicardial adipose tissue (EAT)?

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## [Cannot segment beyond frame 182](https://discourse.slicer.org/t/cannot-segment-beyond-frame-182/42965)

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**Author:** [@mbol](https://discourse.slicer.org/u/mbol)\
**Replies:** 2\
**Last updated:** [May 16, 2025, 3:57pm UTC](https://discourse.slicer.org/t/cannot-segment-beyond-frame-182/42965 "2025-05-16T15:57:20Z")

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Hello, My apologies if this was brought up earlier but I could not find smothing similar in the question bank. I have started using the latest version of 3D slicer 5.8.1 and I noticed that I can only annotate up to fram…

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## [Under arch, installed Slicer and SlicerSwissSkullStripper. Ran and got undefined symbol: \_ZN10slicer\_itk13ProcessObject9SetOutputERKSsPNS\_10DataObjectE error](https://discourse.slicer.org/t/under-arch-installed-slicer-and-slicerswissskullstripper-ran-and-got-undefined-symbol-zn10slicer-itk13processobject9setoutputerksspns-10dataobjecte-error/42966)

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**Author:** [@hoteh](https://discourse.slicer.org/u/hoteh)\
**Replies:** 8\
**Last updated:** [May 16, 2025, 3:37pm UTC](https://discourse.slicer.org/t/under-arch-installed-slicer-and-slicerswissskullstripper-ran-and-got-undefined-symbol-zn10slicer-itk13processobject9setoutputerksspns-10dataobjecte-error/42966 "2025-05-16T15:37:49Z")

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Slicer --version Slicer 5.8.1-2025-03-02 SwissSkullStripper Last update: Mon Mar 03 2025 4257d72 Any more information required?

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## [Windows "not responding" error remains after reinstallation](https://discourse.slicer.org/t/windows-not-responding-error-remains-after-reinstallation/42933)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 4\
**Last updated:** [May 16, 2025, 3:18pm UTC](https://discourse.slicer.org/t/windows-not-responding-error-remains-after-reinstallation/42933 "2025-05-16T15:18:10Z")

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Is there a way to more thoroughly uninstall Slicer? After uninstalling via Windows add/remove programs and reinstalling, it seems to remember my previous settings and I’m not sure if it is actually removing all the vari…

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## [I need to merge two diferent segmentations models](https://discourse.slicer.org/t/i-need-to-merge-two-diferent-segmentations-models/42967)

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**Author:** [@Azambuja](https://discourse.slicer.org/u/Azambuja)\
**Replies:** 1\
**Last updated:** [May 16, 2025, 12:54pm UTC](https://discourse.slicer.org/t/i-need-to-merge-two-diferent-segmentations-models/42967 "2025-05-16T12:54:14Z")

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I have two different DICOM files, and they complement each other. I made the first segmentation in Slicer using the first model, then the second one, and now I need to complete my 3D model by merging the two segmentation…

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## [Unable to Find 'Segment Cross-Section Area' Module in 3D Slicer 5.8.1 – Assistance Required](https://discourse.slicer.org/t/unable-to-find-segment-cross-section-area-module-in-3d-slicer-5-8-1-assistance-required/42964)

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**Author:** [@chcho150](https://discourse.slicer.org/u/chcho150)\
**Replies:** 1\
**Last updated:** [May 16, 2025, 12:49pm UTC](https://discourse.slicer.org/t/unable-to-find-segment-cross-section-area-module-in-3d-slicer-5-8-1-assistance-required/42964 "2025-05-16T12:49:52Z")

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I would like to inquire about measuring the cross-sectional area of segments in 3D Slicer. I am currently using version 5.8.1. However, I was unable to locate the “Segment Cross-Section Area” module in the Extension Mana…

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## [How to crop volume rendering by slices](https://discourse.slicer.org/t/how-to-crop-volume-rendering-by-slices/42953)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 1\
**Last updated:** [May 15, 2025, 9:30pm UTC](https://discourse.slicer.org/t/how-to-crop-volume-rendering-by-slices/42953 "2025-05-15T21:30:06Z")

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The detail in the slice views are often useful for me when I am looking at 3D rendering in cropped view. The way rendering works, details are often hidden and contrast is harder to adjust. I find it useful to crop and th…

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## [Increasing latency issues using Plus Server](https://discourse.slicer.org/t/increasing-latency-issues-using-plus-server/42936)

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**Author:** [@orionwiersma](https://discourse.slicer.org/u/orionwiersma)\
**Replies:** 3\
**Last updated:** [May 15, 2025, 5:36pm UTC](https://discourse.slicer.org/t/increasing-latency-issues-using-plus-server/42936 "2025-05-15T17:36:40Z")

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Hello, I’m having issues with an increase in latency in slicer. The outputted stream suffers from a constant increase in latency. I suspect the issue has to do with a delay in plus server. When I run the stream directly…

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## [Failure to Compute Results using TotalSegmentator (returned non-zero exist status 1)](https://discourse.slicer.org/t/failure-to-compute-results-using-totalsegmentator-returned-non-zero-exist-status-1/42927)

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**Author:** [@tjlotz](https://discourse.slicer.org/u/tjlotz)\
**Replies:** 2\
**Last updated:** [May 15, 2025, 4:22pm UTC](https://discourse.slicer.org/t/failure-to-compute-results-using-totalsegmentator-returned-non-zero-exist-status-1/42927 "2025-05-15T16:22:47Z")

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Hello Slicer Support! I have been trying to run TotalSegmentator, but it has been failing. The Slicer Error message that I have been receiving states, “… returned non-zero exit status 1.” Can you please help me underst…

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## [How to customize the HU range in a histogram?](https://discourse.slicer.org/t/how-to-customize-the-hu-range-in-a-histogram/25953)

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**Author:** [@shansra11](https://discourse.slicer.org/u/shansra11)\
**Replies:** 4\
**Last updated:** [May 15, 2025, 4:23am UTC](https://discourse.slicer.org/t/how-to-customize-the-hu-range-in-a-histogram/25953 "2025-05-15T04:23:21Z")

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How would I go about assessing what percent of a mass is cystic (-100 to -10 HU), cystic (0-20 HU), or solid (20+ HU). Is there any way to assess macroscopic fat, meaning confluent areas of fat attenuation as opposed to…

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## [Changing the Hounsfield unit in a DICOM CT image](https://discourse.slicer.org/t/changing-the-hounsfield-unit-in-a-dicom-ct-image/42370)

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**Author:** [@azam](https://discourse.slicer.org/u/azam)\
**Replies:** 2\
**Last updated:** [May 15, 2025, 3:52am UTC](https://discourse.slicer.org/t/changing-the-hounsfield-unit-in-a-dicom-ct-image/42370 "2025-05-15T03:52:15Z")

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Hi everyone I have a CT image in DICOM format that I exported it from Brachytherapy treatment planning system. I want to remove the Brachy applicators from the CT image. In other words, I want to change its Hounsfield u…

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## [Brain SPECT with Tc99m HMPAO problem loading dicom file](https://discourse.slicer.org/t/brain-spect-with-tc99m-hmpao-problem-loading-dicom-file/42920)

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**Author:** [@Dominic\_Velasco\_MD\_M](https://discourse.slicer.org/u/Dominic_Velasco_MD_M)\
**Replies:** 2\
**Last updated:** [May 15, 2025, 12:16am UTC](https://discourse.slicer.org/t/brain-spect-with-tc99m-hmpao-problem-loading-dicom-file/42920 "2025-05-15T00:16:40Z")

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It seems that when I load the Dicom file the volume rendering is distorted. The axial, coronal is the brain spect tomo, and sagittal are not displaying as you would expect it to be. The dicom file is from Siemen Simbia.…

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## [Method to deform rib cartilage with elevation of the sternum in pectus excavatum](https://discourse.slicer.org/t/method-to-deform-rib-cartilage-with-elevation-of-the-sternum-in-pectus-excavatum/35426)

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**Author:** [@Mark\_Ryan](https://discourse.slicer.org/u/Mark_Ryan)\
**Replies:** 5\
**Last updated:** [May 15, 2025, 12:02am UTC](https://discourse.slicer.org/t/method-to-deform-rib-cartilage-with-elevation-of-the-sternum-in-pectus-excavatum/35426 "2025-05-15T00:02:39Z")

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I’ve been successfully modeling the thoracic skeleton and rib cartilage for a while now for planning Nuss procedures in pectus excavatum patients. What I would like to do is model the correction of deformed cartilage tha…

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## [Build Error in Custom 3D Slicer App: 'qMRMLWidget': is not a class or namespace name and pixmapFromIcon not found](https://discourse.slicer.org/t/build-error-in-custom-3d-slicer-app-qmrmlwidget-is-not-a-class-or-namespace-name-and-pixmapfromicon-not-found/42902)

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**Author:** [@software](https://discourse.slicer.org/u/software)\
**Replies:** 3\
**Last updated:** [May 14, 2025, 10:44pm UTC](https://discourse.slicer.org/t/build-error-in-custom-3d-slicer-app-qmrmlwidget-is-not-a-class-or-namespace-name-and-pixmapfromicon-not-found/42902 "2025-05-14T22:44:26Z")

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Hi all, I’m encountering an issue while building a custom 3D Slicer-based application using the Kitware custom app template. I’ve previously created another custom app (around 2 months ago) with the same versions of CMa…

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## [Is it possible not to show data in reformat by default](https://discourse.slicer.org/t/is-it-possible-not-to-show-data-in-reformat-by-default/42764)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 12\
**Last updated:** [May 14, 2025, 7:18pm UTC](https://discourse.slicer.org/t/is-it-possible-not-to-show-data-in-reformat-by-default/42764 "2025-05-14T19:18:28Z")

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I have datasets that I manually aligned or rigidly registered. Every time I load these back into Slicer, they come in “Reformat” view, as opposed to the axial/sagittal/coronal. Is there a way to disable this behavior glo…

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## [Kidney segmentation ](https://discourse.slicer.org/t/kidney-segmentation/42919)

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**Author:** [@Matilazy](https://discourse.slicer.org/u/Matilazy)\
**Replies:** 1\
**Last updated:** [May 14, 2025, 12:36pm UTC](https://discourse.slicer.org/t/kidney-segmentation/42919 "2025-05-14T12:36:35Z")

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Hi!!! I want to know if there is a way to automatically get the medullar and cortex parts of the kidney based on their values?

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## [How to convert raw rotational CT scan data into 3d data](https://discourse.slicer.org/t/how-to-convert-raw-rotational-ct-scan-data-into-3d-data/42865)

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**Author:** [@Samino](https://discourse.slicer.org/u/Samino)\
**Replies:** 6\
**Last updated:** [May 14, 2025, 8:25am UTC](https://discourse.slicer.org/t/how-to-convert-raw-rotational-ct-scan-data-into-3d-data/42865 "2025-05-14T08:25:16Z")

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Hi there, Question from a newbie, coming from marine biology. I have raw image data in tiff format, of the subject (mollusc) being rotated in the micro CT scanner. How do I convert this into 3D dicom data that can be …

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## [Why does 3dslicer crash every time I download tissue\_4\_type to 2.88mb](https://discourse.slicer.org/t/why-does-3dslicer-crash-every-time-i-download-tissue-4-type-to-2-88mb/42909)

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**Author:** [@dssnn](https://discourse.slicer.org/u/dssnn)\
**Replies:** 1\
**Last updated:** [May 13, 2025, 2:16pm UTC](https://discourse.slicer.org/t/why-does-3dslicer-crash-every-time-i-download-tissue-4-type-to-2-88mb/42909 "2025-05-13T14:16:55Z")

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## [Export volume as .npy in Axial, Coronal, Saggital](https://discourse.slicer.org/t/export-volume-as-npy-in-axial-coronal-saggital/42884)

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**Author:** [@SANTIAGO\_PENDON\_MING](https://discourse.slicer.org/u/SANTIAGO_PENDON_MING)\
**Replies:** 3\
**Last updated:** [May 13, 2025, 12:49pm UTC](https://discourse.slicer.org/t/export-volume-as-npy-in-axial-coronal-saggital/42884 "2025-05-13T12:49:39Z")

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Hi to everyone. I am currently working with brain MRI DICOM files and, for further post processing pipelines, I would like to export it as npy. files. When I do that (programmatically) I found that the each volume is or…

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## [Details inside a bone for dental implant planning](https://discourse.slicer.org/t/details-inside-a-bone-for-dental-implant-planning/22088)

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**Author:** [@CaetanoPM](https://discourse.slicer.org/u/CaetanoPM)\
**Replies:** 11\
**Last updated:** [May 24, 2024, 11:07am UTC](https://discourse.slicer.org/t/details-inside-a-bone-for-dental-implant-planning/22088 "2024-05-24T11:07:57Z")

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Hi, I’m dentist, and i’m having some trouble with my stl file. I followed all the steps, and export the stl file of the jaw bones. OK I put in Meshmixer to edit, and wen i look inside, have no details, only a empty sp…

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## [GPA slicermorph factor no working](https://discourse.slicer.org/t/gpa-slicermorph-factor-no-working/42886)

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**Author:** [@coco](https://discourse.slicer.org/u/coco)\
**Replies:** 1\
**Last updated:** [May 12, 2025, 3:24pm UTC](https://discourse.slicer.org/t/gpa-slicermorph-factor-no-working/42886 "2025-05-12T15:24:35Z")

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Dear all, I’m running in an issue with the GPA module of slicermorph, I can’t add a factor anymore, any idea ? many thanks s

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## [Multivolume rendering](https://discourse.slicer.org/t/multivolume-rendering/42858)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [May 12, 2025, 3:22pm UTC](https://discourse.slicer.org/t/multivolume-rendering/42858 "2025-05-12T15:22:14Z")

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I am testing multiple volume rendering for a visualization. When I turn on the 3rd volume, it doesn’t displayed, and I receive this message Links failed: ERROR: Implementation limit of 16 active fragment shader samplers…

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## [Convert relative 3ddose to absolute dose in 3DSlicer](https://discourse.slicer.org/t/convert-relative-3ddose-to-absolute-dose-in-3dslicer/42852)

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**Author:** [@TaHamI](https://discourse.slicer.org/u/TaHamI)\
**Replies:** 1\
**Last updated:** [May 12, 2025, 1:56pm UTC](https://discourse.slicer.org/t/convert-relative-3ddose-to-absolute-dose-in-3dslicer/42852 "2025-05-12T13:56:13Z")

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Hello, I know, DOSXYZnrc like other monte-carlo simulations reports relative (normalized) dose (averaging on the number of histories, the number of histories just relates to dose uncertainty, no change the dose value). …

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## [Radiomics on slicer extensions](https://discourse.slicer.org/t/radiomics-on-slicer-extensions/42885)

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**Author:** [@Ash\_Alarfaj](https://discourse.slicer.org/u/Ash_Alarfaj)\
**Replies:** 1\
**Last updated:** [May 12, 2025, 12:28pm UTC](https://discourse.slicer.org/t/radiomics-on-slicer-extensions/42885 "2025-05-12T12:28:03Z")

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Hello I am using 3d slicer version 5.8.1 and other older versions. I am trying to install Radiomics but this extension is not available, how I find it, also update check and bookmark is not active. Thanks

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## [Dicom pics is unusual ](https://discourse.slicer.org/t/dicom-pics-is-unusual/42853)

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**Author:** [@chuckfx](https://discourse.slicer.org/u/chuckfx)\
**Replies:** 1\
**Last updated:** [May 12, 2025, 11:54am UTC](https://discourse.slicer.org/t/dicom-pics-is-unusual/42853 "2025-05-12T11:54:21Z")

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Hi, I’m a patient and I want to take my CT scan result for doctor review. However when I download the CT scan result, it is unlike a “common” Dicom file I knew and it has two layer of it. Could you guys please guide me h…

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