# Support **URL:** https://discourse.slicer.org/c/support/11.md?page=24 [Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md) **Page:** 25 --- ## [Feature request: add more recent file history facilities](https://discourse.slicer.org/t/feature-request-add-more-recent-file-history-facilities/44848)

**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\ **Replies:** 0\ **Last updated:** [October 22, 2025, 5:30pm UTC](https://discourse.slicer.org/t/feature-request-add-more-recent-file-history-facilities/44848 "2025-10-22T17:30:04Z")

The recent file history disables menu items when the referenced files are not found when Slicer starts. The missing files may be available again if they are on removable media. They may also never appear again and occupy… --- ## [Generate digitally reconstructed radiograph from an 3DCT. How to choose different controllpoints of an arc beam?](https://discourse.slicer.org/t/generate-digitally-reconstructed-radiograph-from-an-3dct-how-to-choose-different-controllpoints-of-an-arc-beam/44798)

**Author:** [@ruju](https://discourse.slicer.org/u/ruju)\ **Replies:** 6\ **Last updated:** [October 22, 2025, 1:07pm UTC](https://discourse.slicer.org/t/generate-digitally-reconstructed-radiograph-from-an-3dct-how-to-choose-different-controllpoints-of-an-arc-beam/44798 "2025-10-22T13:07:06Z")

Hello, I would like to create some DRRs from a 3DCT. I have one arc beam with some different controllpoints. If I want to generate a DRR with DDR Image Computation of this beam, it only generates a DRR for the first bea… --- ## [Automatic Lesion Segmentation on Liver](https://discourse.slicer.org/t/automatic-lesion-segmentation-on-liver/44717)

**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\ **Replies:** 3\ **Last updated:** [October 22, 2025, 9:04am UTC](https://discourse.slicer.org/t/automatic-lesion-segmentation-on-liver/44717 "2025-10-22T09:04:09Z")

Dear Expert, Is there any extension that can segment lesions/tumors on the Liver? CTA image or any CT images. --- ## [How to anonymize a scene](https://discourse.slicer.org/t/how-to-anonymize-a-scene/44822)

**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\ **Replies:** 8\ **Last updated:** [October 21, 2025, 7:27pm UTC](https://discourse.slicer.org/t/how-to-anonymize-a-scene/44822 "2025-10-21T19:27:33Z")

@chir.set started a discussion in the Slicer issue tracker on github, but it is worth giving more visibility to this to the community: Please consider this workflow: load a DICOM volume with patient information save … --- ## [Show 3D but not shading in red window](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835)

**Author:** [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\ **Replies:** 6\ **Last updated:** [October 21, 2025, 12:53pm UTC](https://discourse.slicer.org/t/show-3d-but-not-shading-in-red-window/44835 "2025-10-21T12:53:53Z")

Is there a way to keep the 3D view but turn off the shading in the Red window in the conventional view? thanks --- ## [Developer Agent for Slicer](https://discourse.slicer.org/t/developer-agent-for-slicer/44787)

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\ **Replies:** 7\ **Last updated:** [October 20, 2025, 8:13pm UTC](https://discourse.slicer.org/t/developer-agent-for-slicer/44787 "2025-10-20T20:13:14Z")

As others, I have been using LLMs to help develop functionality in the Slicer. This is typically writing code in VS, then loading it into slicer and testing it, then copy and pasting the error back to the agent to iterat… --- ## [Problem with mandibular plane in bone reconstruction planner](https://discourse.slicer.org/t/problem-with-mandibular-plane-in-bone-reconstruction-planner/43511)

**Author:** [@Marco\_Sarcinella](https://discourse.slicer.org/u/Marco_Sarcinella)\ **Replies:** 4\ **Last updated:** [October 20, 2025, 6:42pm UTC](https://discourse.slicer.org/t/problem-with-mandibular-plane-in-bone-reconstruction-planner/43511 "2025-10-20T18:42:06Z")

Hi! I’m new in 3slicer, i had only one case of mandibulectomy in 3 d slicer the past month. Now I’have a problem when i do te positioning of mandibolar plane. Why when i set mandibular plane in correct position they cut… --- ## [Workflow for FEM Simulation of Soft Tissue Deformation after Bimaxillary Surgery (using 3D Slicer + Open-Source Tools)](https://discourse.slicer.org/t/workflow-for-fem-simulation-of-soft-tissue-deformation-after-bimaxillary-surgery-using-3d-slicer-open-source-tools/44829)

**Author:** [@tschreiner](https://discourse.slicer.org/u/tschreiner)\ **Replies:** 1\ **Last updated:** [October 20, 2025, 6:33pm UTC](https://discourse.slicer.org/t/workflow-for-fem-simulation-of-soft-tissue-deformation-after-bimaxillary-surgery-using-3d-slicer-open-source-tools/44829 "2025-10-20T18:33:33Z")

Hi everyone, I’m working on a project to simulate soft tissue deformation resulting from a bimaxillary (orthognathic) surgery. My goal is to model the soft tissue displacement and facial profile changes based on pre- a… --- ## [Cannot generate independent segments — Add always edits Segment\_1](https://discourse.slicer.org/t/cannot-generate-independent-segments-add-always-edits-segment-1/44823)

**Author:** [@Saliha\_Akcay](https://discourse.slicer.org/u/Saliha_Akcay)\ **Replies:** 1\ **Last updated:** [October 20, 2025, 4:18pm UTC](https://discourse.slicer.org/t/cannot-generate-independent-segments-add-always-edits-segment-1/44823 "2025-10-20T16:18:52Z")

Hello, I am working on lesion segmentation and need to extract a clean 2-mm peri-lesional bone shell for texture/fractal analysis. The problem is: when I click “Add” to create a new segment (e.g. Segment\_2), Slicer stil… --- ## [Probe Volume with Model Question](https://discourse.slicer.org/t/probe-volume-with-model-question/44765)

**Author:** [@aceegreene](https://discourse.slicer.org/u/aceegreene)\ **Replies:** 13\ **Last updated:** [October 20, 2025, 3:57pm UTC](https://discourse.slicer.org/t/probe-volume-with-model-question/44765 "2025-10-20T15:57:06Z")

Hi everyone - I am struggling to understand what the probe volume with model module in Slicer does. When probing a model with a volume that has scalar values assigned to its entire volume, are the values ultimately seen … --- ## [Grown from seeds took more than 2 hours](https://discourse.slicer.org/t/grown-from-seeds-took-more-than-2-hours/44647)

**Author:** [@JaredAmudeo](https://discourse.slicer.org/u/JaredAmudeo)\ **Replies:** 14\ **Last updated:** [October 20, 2025, 3:17pm UTC](https://discourse.slicer.org/t/grown-from-seeds-took-more-than-2-hours/44647 "2025-10-20T15:17:10Z")

I work with high-resolution micro-CT scans of fossils, obtained with Skyscan 1272 and 1273 micro-CTs. Since the data comes as stacks of .png images, I use the Slice Morph extension to load them. Because of the condition … --- ## [Monai Label - Start with Labeled Dataset](https://discourse.slicer.org/t/monai-label-start-with-labeled-dataset/31801)

**Author:** [@nasibov\_98](https://discourse.slicer.org/u/nasibov_98)\ **Replies:** 2\ **Last updated:** [October 20, 2025, 8:10am UTC](https://discourse.slicer.org/t/monai-label-start-with-labeled-dataset/31801 "2025-10-20T08:10:24Z")

Hi, I would like to use my own labeled dataset to kickstart monai label training. Background: Followed the youtube installation and scribbler tutorial, i was able to download and view “Task09\_Spleen” in 3D slicer usin… --- ## [Hounsfield units measurement](https://discourse.slicer.org/t/hounsfield-units-measurement/37590)

**Author:** [@Hernan](https://discourse.slicer.org/u/Hernan)\ **Replies:** 3\ **Last updated:** [October 19, 2025, 1:13pm UTC](https://discourse.slicer.org/t/hounsfield-units-measurement/37590 "2025-10-19T13:13:06Z")

I’m trying to measure the mean HU in various regions of interest of proximal humerus in coronal and axial slices. I was using radiant before but thing is i’m getting huge HU variations in same patients and between them (… --- ## [Volume calculation of open 3D facial surface models in Slicer](https://discourse.slicer.org/t/volume-calculation-of-open-3d-facial-surface-models-in-slicer/44801)

**Author:** [@Faisal\_Alshaikh](https://discourse.slicer.org/u/Faisal_Alshaikh)\ **Replies:** 1\ **Last updated:** [October 17, 2025, 6:50pm UTC](https://discourse.slicer.org/t/volume-calculation-of-open-3d-facial-surface-models-in-slicer/44801 "2025-10-17T18:50:08Z")

Hi, is there any module in 3D Slicer that can calculate the volume of 3D facial surface models (for example .obj files from the Vectra H2 system)? These models are not closed surfaces — for example, they are open at th… --- ## [Segmentation DICOM export](https://discourse.slicer.org/t/segmentation-dicom-export/44788)

**Author:** [@CSalt](https://discourse.slicer.org/u/CSalt)\ **Replies:** 1\ **Last updated:** [October 17, 2025, 8:01am UTC](https://discourse.slicer.org/t/segmentation-dicom-export/44788 "2025-10-17T08:01:19Z")

I am working in slicer 5.9.0 (though I have also used 5.8.0) and I am trying to export PET Segmentations to DICOM. I did not have luck using CLI to export segmentations or the PET labelmap. I have the SlicerRT extension,… --- ## [Trame-Slicer and SlicerLib wheel](https://discourse.slicer.org/t/trame-slicer-and-slicerlib-wheel/41388)

**Author:** [@park](https://discourse.slicer.org/u/park)\ **Replies:** 3\ **Last updated:** [October 17, 2025, 5:17am UTC](https://discourse.slicer.org/t/trame-slicer-and-slicerlib-wheel/41388 "2025-10-17T05:17:56Z")

Hi all, As seen in the LinkedIn and Project Week slider, Trame-Slicer and SlicerLib wheel appear to be remarkable advancements!! Our team is very eager to test this as soon as possible, ideally within a day. We noticed… --- ## [Are there any extensions for filling large holes on surface models for conversion to segments?](https://discourse.slicer.org/t/are-there-any-extensions-for-filling-large-holes-on-surface-models-for-conversion-to-segments/44008)

**Author:** [@ZackA](https://discourse.slicer.org/u/ZackA)\ **Replies:** 4\ **Last updated:** [October 16, 2025, 7:23pm UTC](https://discourse.slicer.org/t/are-there-any-extensions-for-filling-large-holes-on-surface-models-for-conversion-to-segments/44008 "2025-10-16T19:23:20Z")

Hello, I am attempting to compare some laser scans I took of bone samples to manual segmentations from MRI scans for my research. The scans are stl files and contain holes in the surface shell due to limitations of the … --- ## [Volume Calculation From Non-Volumetric Scans](https://discourse.slicer.org/t/volume-calculation-from-non-volumetric-scans/44782)

**Author:** [@erencan](https://discourse.slicer.org/u/erencan)\ **Replies:** 3\ **Last updated:** [October 16, 2025, 2:33pm UTC](https://discourse.slicer.org/t/volume-calculation-from-non-volumetric-scans/44782 "2025-10-16T14:33:54Z")

Hello, I’m a newbie to the community. I wanted to ask if trying to calculate pituitary adenoma volumes from routine scans that are not volumetric is feasible. Does slicer take slice gaps and thickness and other parameter… --- ## [DentalSegmentator does not complete on Slicer 5.7.0](https://discourse.slicer.org/t/dentalsegmentator-does-not-complete-on-slicer-5-7-0/40793)

**Author:** [@dr\_drcadcam](https://discourse.slicer.org/u/dr_drcadcam)\ **Replies:** 4\ **Last updated:** [October 16, 2025, 12:33pm UTC](https://discourse.slicer.org/t/dentalsegmentator-does-not-complete-on-slicer-5-7-0/40793 "2025-10-16T12:33:15Z")

Problem report for Slicer 5.7.0-2024-12-16 win-amd64: \[please describe expected and actual behavior\] \[DEBUG\]\[Qt\] 18.12.2024 10:51:23 (unknown:0) - Session start time …: 20241218\_105123 \[DEBUG\]\[Qt\] 18.12.2024 10:51:23 … --- ## [How to stitch together two sets of CT slices to make one file](https://discourse.slicer.org/t/how-to-stitch-together-two-sets-of-ct-slices-to-make-one-file/1197)

**Author:** [@Noemi\_Perez](https://discourse.slicer.org/u/Noemi_Perez)\ **Replies:** 16\ **Last updated:** [October 16, 2025, 1:36am UTC](https://discourse.slicer.org/t/how-to-stitch-together-two-sets-of-ct-slices-to-make-one-file/1197 "2025-10-16T01:36:13Z")

Operating system: Mac OS X 10.10 Slicer version: 4.6.2 Expected behavior: I import a folder with 421 DICOM slices that should show all of the cranium and mandible of an individual Actual behavior: The program says tha… --- ## [Full screen issue with slicer on mac os 15.0.1](https://discourse.slicer.org/t/full-screen-issue-with-slicer-on-mac-os-15-0-1/39753)

**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\ **Replies:** 31\ **Last updated:** [October 15, 2025, 4:52am UTC](https://discourse.slicer.org/t/full-screen-issue-with-slicer-on-mac-os-15-0-1/39753 "2025-10-15T04:52:12Z")

full screen issue with slicer on mac os 15.0.1. the right of screen is clipped in full screen . this is since i got new mac os 15 --- ## [CT or CBCT databases of edentulous patients](https://discourse.slicer.org/t/ct-or-cbct-databases-of-edentulous-patients/44761)

**Author:** [@Fluvio\_Lobo](https://discourse.slicer.org/u/Fluvio_Lobo)\ **Replies:** 1\ **Last updated:** [October 14, 2025, 11:24pm UTC](https://discourse.slicer.org/t/ct-or-cbct-databases-of-edentulous-patients/44761 "2025-10-14T23:24:22Z")

Hi all! It has been a minute. Does anyone know of a good open-source library of HEAD/NECK CT or CBCT showing very severe edentulism? This may be too specific, but I thought I would give it a shot! --- ## [US probe tracking with ArUco marker ](https://discourse.slicer.org/t/us-probe-tracking-with-aruco-marker/44751)

**Author:** [@Hamza\_Oran](https://discourse.slicer.org/u/Hamza_Oran)\ **Replies:** 3\ **Last updated:** [October 14, 2025, 6:16pm UTC](https://discourse.slicer.org/t/us-probe-tracking-with-aruco-marker/44751 "2025-10-14T18:16:50Z")

Hello, We want to track an ultrasound probe using an ArUco marker because we need to determine the probe’s position and orientation to perform 3D reconstruction of ultrasound images. More specifically, our goal is to p… --- ## [Add flow extension proportionnal to inlet/outlet diameter](https://discourse.slicer.org/t/add-flow-extension-proportionnal-to-inlet-outlet-diameter/44744)

**Author:** [@gred](https://discourse.slicer.org/u/gred)\ **Replies:** 1\ **Last updated:** [October 14, 2025, 1:33pm UTC](https://discourse.slicer.org/t/add-flow-extension-proportionnal-to-inlet-outlet-diameter/44744 "2025-10-14T13:33:27Z")

Dear all, Is there an obvious way to add flow domain extensions using the Clip Vessel module proportional to the diameter of the inlet and outlet in question according to the centerline quantification table? Best, Gre… --- ## [Cloning a composite transform yields incorrect result](https://discourse.slicer.org/t/cloning-a-composite-transform-yields-incorrect-result/44654)

**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\ **Replies:** 6\ **Last updated:** [October 14, 2025, 3:03am UTC](https://discourse.slicer.org/t/cloning-a-composite-transform-yields-incorrect-result/44654 "2025-10-14T03:03:40Z")

A composite transform node, such as those created by an ANTs QuickSyN registration, is not cloned correctly by the subject hierarchy node. I am using Slicer 5.8.1 on Windows 11. I have been working on taking apart and r… --- ## [Optitrack Trio V120 with PlusServer](https://discourse.slicer.org/t/optitrack-trio-v120-with-plusserver/44720)

**Author:** [@max\_05ge](https://discourse.slicer.org/u/max_05ge)\ **Replies:** 2\ **Last updated:** [October 14, 2025, 2:44am UTC](https://discourse.slicer.org/t/optitrack-trio-v120-with-plusserver/44720 "2025-10-14T02:44:21Z")

**Author:** [@Reshwano](https://discourse.slicer.org/u/Reshwano)\ **Replies:** 1\ **Last updated:** [October 13, 2025, 11:21pm UTC](https://discourse.slicer.org/t/superimposition-of-dicom-files/44752 "2025-10-13T23:21:15Z")

Dear 3d slicer professionals hope my message finds you well I have a project and want to superimpose two dicom files or stl files to compare deviation of dental implant, I want to know step by step procedure. Best reg… --- ## [Download page is down](https://discourse.slicer.org/t/download-page-is-down/44734)

**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\ **Replies:** 2\ **Last updated:** [October 13, 2025, 5:58pm UTC](https://discourse.slicer.org/t/download-page-is-down/44734 "2025-10-13T17:58:41Z")

I just noticed this. I tried from mac and windows at home and from a cloud linux machine with same result. --- ## [Vessel reconstruction from centerlines/radius](https://discourse.slicer.org/t/vessel-reconstruction-from-centerlines-radius/44625)

**Author:** [@gred](https://discourse.slicer.org/u/gred)\ **Replies:** 8\ **Last updated:** [October 13, 2025, 2:23pm UTC](https://discourse.slicer.org/t/vessel-reconstruction-from-centerlines-radius/44625 "2025-10-13T14:23:27Z")

Hello everyone, I am working on segmenting small cerebral arteries for future CFD studies. After segmenting the small arteries that interest me, I am looking for a way to reconstruct an ideal (cylindrical) geometry fro… --- ## [Recommended Volume Reconstruction Configuration for best Ultrasound 3D reconstruction](https://discourse.slicer.org/t/recommended-volume-reconstruction-configuration-for-best-ultrasound-3d-reconstruction/43770)

**Author:** [@orionwiersma](https://discourse.slicer.org/u/orionwiersma)\ **Replies:** 2\ **Last updated:** [October 11, 2025, 8:45pm UTC](https://discourse.slicer.org/t/recommended-volume-reconstruction-configuration-for-best-ultrasound-3d-reconstruction/43770 "2025-10-11T20:45:30Z")

Hello, For context I currently use Slicer for Ultrasound reconstruction of bone surfaces. This has been relatively good for outputting the shape of the bone, but the image resolution is far lower than I would like. Addi… [Previous page](https://discourse.slicer.org/c/support/11.md?page=23) [Next page](https://discourse.slicer.org/c/support/11.md?page=25)