# Latest

**URL:** https://discourse.slicer.org/latest.md?page=56

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

**Page:** 57

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## [What Must be my Computer Capacity in Terms of CPU and RAM. Slicer 3D is running Slow.](https://discourse.slicer.org/t/what-must-be-my-computer-capacity-in-terms-of-cpu-and-ram-slicer-3d-is-running-slow/43001)

<div class="topic-metadata">

**Author:** [@khersi](https://discourse.slicer.org/u/khersi)\
**Replies:** 3\
**Last updated:** [May 20, 2025, 5:45am UTC](https://discourse.slicer.org/t/what-must-be-my-computer-capacity-in-terms-of-cpu-and-ram-slicer-3d-is-running-slow/43001 "2025-05-20T05:45:28Z")

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Hello, I have downloaded the latest version of Slicer 3D, in my DELL Laptop. The application is running so slow that I can not create 3D images. Could you please advise how much CPU and RAM I would need to operate 3D Sl…

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## [Input Method Cannot Be Activated in Packaged Slicer on Ubuntu](https://discourse.slicer.org/t/input-method-cannot-be-activated-in-packaged-slicer-on-ubuntu/42958)

<div class="topic-metadata">

**Author:** [@herryliq](https://discourse.slicer.org/u/herryliq)\
**Replies:** 3\
**Last updated:** [May 20, 2025, 5:09am UTC](https://discourse.slicer.org/t/input-method-cannot-be-activated-in-packaged-slicer-on-ubuntu/42958 "2025-05-20T05:09:59Z")

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We encountered an input method issue during custom development based on 3D Slicer 5.6.2. Operating System: Ubuntu 22.04.4 LTS Slicer Version: 5.6.2 (custom build) Problem Description: When running Slicer direc…

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## [How to check line profile of all slice](https://discourse.slicer.org/t/how-to-check-line-profile-of-all-slice/43007)

<div class="topic-metadata">

**Author:** [@Vikram](https://discourse.slicer.org/u/Vikram)\
**Replies:** 0\
**Last updated:** [May 20, 2025, 4:13am UTC](https://discourse.slicer.org/t/how-to-check-line-profile-of-all-slice/43007 "2025-05-20T04:13:08Z")

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Hello everyone, hope you are all doing well i want to know how to check line profile of all CT scan slices together, not slice by slice.

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## [GPU and CPU rendering on MacBookPro M2 ProMax](https://discourse.slicer.org/t/gpu-and-cpu-rendering-on-macbookpro-m2-promax/29152)

<div class="topic-metadata">

**Author:** [@Adam\_Summers](https://discourse.slicer.org/u/Adam_Summers)\
**Replies:** 7\
**Last updated:** [May 20, 2025, 12:50am UTC](https://discourse.slicer.org/t/gpu-and-cpu-rendering-on-macbookpro-m2-promax/29152 "2025-05-20T00:50:26Z")

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I have the latest Apple MacBook with Apple silicon, 96GB of RAM running Ventura. I am using the most recent build of Slicer for Mac from 2023-4-25. My fairly large data sets are rendering well, though slowly, using the C…

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## [No developer meeting May 20th](https://discourse.slicer.org/t/no-developer-meeting-may-20th/43004)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [May 19, 2025, 11:22pm UTC](https://discourse.slicer.org/t/no-developer-meeting-may-20th/43004 "2025-05-19T23:22:25Z")

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There will be no developer meeting on May 20th, due to most of the core dev team being unavailable.

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## [How can I crop a segmentation to the size of a ROI?](https://discourse.slicer.org/t/how-can-i-crop-a-segmentation-to-the-size-of-a-roi/43003)

<div class="topic-metadata">

**Author:** [@fabian34](https://discourse.slicer.org/u/fabian34)\
**Replies:** 1\
**Last updated:** [May 19, 2025, 1:45pm UTC](https://discourse.slicer.org/t/how-can-i-crop-a-segmentation-to-the-size-of-a-roi/43003 "2025-05-19T13:45:27Z")

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I have several segmentations I want to 3d-print, that each consist of 15 segments (which are bones in my case). I only want to print a relevant area of the segmentation, due to material and time reasons. Also this area s…

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## [Mapping and patching error in VMTK](https://discourse.slicer.org/t/mapping-and-patching-error-in-vmtk/43002)

<div class="topic-metadata">

**Author:** [@marina\_de\_santis](https://discourse.slicer.org/u/marina_de_santis)\
**Replies:** 0\
**Last updated:** [May 19, 2025, 1:39pm UTC](https://discourse.slicer.org/t/mapping-and-patching-error-in-vmtk/43002 "2025-05-19T13:39:29Z")

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Hello everyone, I’m having some trouble with the mapping and patching tutorial. I’ve followed all the steps, but at the end when I try to visualize the plane and angular subdivision, the grid shows some holes. I’ve trie…

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## [Baffle planner input - proposal - frustration](https://discourse.slicer.org/t/baffle-planner-input-proposal-frustration/42859)

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**Author:** [@Esteban\_Barreiro](https://discourse.slicer.org/u/Esteban_Barreiro)\
**Replies:** 11\
**Last updated:** [May 19, 2025, 4:05am UTC](https://discourse.slicer.org/t/baffle-planner-input-proposal-frustration/42859 "2025-05-19T04:05:56Z")

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Hi there lovely scientific nerdi comunity! Love you all! Im a teacher, and one of the modules I use to teach for medical institutions such hospitals, clinics and i+d+i+i … Im writing this post cause I think that, in so…

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## [How to bypass the git clone operations during the 3D Slicer build?](https://discourse.slicer.org/t/how-to-bypass-the-git-clone-operations-during-the-3d-slicer-build/42926)

<div class="topic-metadata">

**Author:** [@MarkLiu](https://discourse.slicer.org/u/MarkLiu)\
**Replies:** 4\
**Last updated:** [May 19, 2025, 2:11am UTC](https://discourse.slicer.org/t/how-to-bypass-the-git-clone-operations-during-the-3d-slicer-build/42926 "2025-05-19T02:11:04Z")

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Dear Community, I’m developing an application based on 3D Slicer. And I have locally built 3D Slicer successfully with superbuild set to true. It is known that for the very first build, the git clone operations will be…

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## [Getting Centerline (vascular modelling toolkit)](https://discourse.slicer.org/t/getting-centerline-vascular-modelling-toolkit/42991)

<div class="topic-metadata">

**Author:** [@desireeb](https://discourse.slicer.org/u/desireeb)\
**Replies:** 0\
**Last updated:** [May 19, 2025, 1:15am UTC](https://discourse.slicer.org/t/getting-centerline-vascular-modelling-toolkit/42991 "2025-05-19T01:15:06Z")

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Hello: I am trying to extract Centerline (vascular modelling toolkit). After finalising the segmentation, I export visible segments to model. Finally, I click Centerline but the programme shows: failed to compute array …

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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)

<div class="topic-metadata">

**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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## [Scissors's Fill Inside operation issue](https://discourse.slicer.org/t/scissorss-fill-inside-operation-issue/35107)

<div class="topic-metadata">

**Author:** [@MJamal](https://discourse.slicer.org/u/MJamal)\
**Replies:** 8\
**Last updated:** [May 18, 2025, 12:31pm UTC](https://discourse.slicer.org/t/scissorss-fill-inside-operation-issue/35107 "2025-05-18T12:31:28Z")

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Hello again, I have applied the scissors’ fill-inside operation to segment 1, but I am encountering the following issues: At minute 0:52, you will notice that the operation is not entirely applied to the part where it…

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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)

<div class="topic-metadata">

**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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## [When creating a extension using Slicer5.9, I've found that the only available type options are "default" and "superbuild".](https://discourse.slicer.org/t/when-creating-a-extension-using-slicer5-9-ive-found-that-the-only-available-type-options-are-default-and-superbuild/42963)

<div class="topic-metadata">

**Author:** [@zhaokaien](https://discourse.slicer.org/u/zhaokaien)\
**Replies:** 4\
**Last updated:** [May 18, 2025, 11:40am UTC](https://discourse.slicer.org/t/when-creating-a-extension-using-slicer5-9-ive-found-that-the-only-available-type-options-are-default-and-superbuild/42963 "2025-05-18T11:40:53Z")

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I have successfully built Slicer using the 5.9 source code. However, when I use the generated Slicer application and try to create an extension, in the Extension Wizard interface, I only see two options for “Type” when c…

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

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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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## [SLICER SALT .... having trouble with "Generate Shape Analysis Structure"](https://discourse.slicer.org/t/slicer-salt-having-trouble-with-generate-shape-analysis-structure/42827)

<div class="topic-metadata">

**Author:** [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Replies:** 3\
**Last updated:** [May 16, 2025, 12:45pm UTC](https://discourse.slicer.org/t/slicer-salt-having-trouble-with-generate-shape-analysis-structure/42827 "2025-05-16T12:45:06Z")

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I’m having trouble with data importer, SlicerSalt 6.0.0. I can import and view the sampledata, but when I try to “Generate Shape Analysis Structure” I get this error on windows and linux. Traceback (most recent call l…

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## [CTK axis widget in 3Drendering](https://discourse.slicer.org/t/ctk-axis-widget-in-3drendering/42962)

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**Author:** [@Pierre\_Bour](https://discourse.slicer.org/u/Pierre_Bour)\
**Replies:** 0\
**Last updated:** [May 16, 2025, 12:07pm UTC](https://discourse.slicer.org/t/ctk-axis-widget-in-3drendering/42962 "2025-05-16T12:07:05Z")

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Dear all, I am working on a code to add a ctk widget in the 3D rendering in the upper right corner. I have currently something working but I was wondering if there is something more elegant that what I have done. …

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

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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 generate RAS bounding box possible to adjust by users ](https://discourse.slicer.org/t/how-to-generate-ras-bounding-box-possible-to-adjust-by-users/42947)

<div class="topic-metadata">

**Author:** [@xwan](https://discourse.slicer.org/u/xwan)\
**Replies:** 0\
**Last updated:** [May 15, 2025, 3:05pm UTC](https://discourse.slicer.org/t/how-to-generate-ras-bounding-box-possible-to-adjust-by-users/42947 "2025-05-15T15:05:25Z")

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I’m working on an extension to generate a bounding box based on 6 or more points placed on the extreme boundaries of a region of interest (e.g., a tumor). Setup: The user loads multiple MR sequences from a single scan…

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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)

<div class="topic-metadata">

**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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