# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=251

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

**Page:** 252

---

## [After Smoothing and hole filling Still some holes arte there in 3 D model of nasal cavity](https://discourse.slicer.org/t/after-smoothing-and-hole-filling-still-some-holes-arte-there-in-3-d-model-of-nasal-cavity/20546)

<div class="topic-metadata">

**Author:** [@Sliceeeeee](https://discourse.slicer.org/u/Sliceeeeee)\
**Replies:** 5\
**Last updated:** [November 9, 2021, 8:03pm UTC](https://discourse.slicer.org/t/after-smoothing-and-hole-filling-still-some-holes-arte-there-in-3-d-model-of-nasal-cavity/20546 "2021-11-09T20:03:00Z")

</div>

I am going to do nasal airflow simulation , i am made a 3D model of nasal cavity in 3D slicer , but still there are many holes what to do ? and also after making 3D model is there any other post processing required befor…

---

## [How to do volumetric segmentationin SLlicer 4.6.2?](https://discourse.slicer.org/t/how-to-do-volumetric-segmentationin-sllicer-4-6-2/995)

<div class="topic-metadata">

**Author:** [@anantpandey1](https://discourse.slicer.org/u/anantpandey1)\
**Replies:** 1\
**Last updated:** [September 1, 2017, 10:21pm UTC](https://discourse.slicer.org/t/how-to-do-volumetric-segmentationin-sllicer-4-6-2/995 "2017-09-01T22:21:25Z")

</div>

The module “volumetric segmentation” is not present in Slicer 4.6.2 How to get it?

---

## [Crop regions outside the radiation field of the DRR image](https://discourse.slicer.org/t/crop-regions-outside-the-radiation-field-of-the-drr-image/20512)

<div class="topic-metadata">

**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 2\
**Last updated:** [November 9, 2021, 1:21pm UTC](https://discourse.slicer.org/t/crop-regions-outside-the-radiation-field-of-the-drr-image/20512 "2021-11-09T13:21:26Z")

</div>

Dear Users and Developers I want to crop DRR image with the Beam. To be more precise, I want to do the following steps: 1- Loading the DRR image taken from the TPS system (for example, RTIMAGE related to Med Tangent ra…

---

## [Applying a Color Map to the ModeltoModel extension](https://discourse.slicer.org/t/applying-a-color-map-to-the-modeltomodel-extension/20528)

<div class="topic-metadata">

**Author:** [@MathiasBrucker](https://discourse.slicer.org/u/MathiasBrucker)\
**Replies:** 2\
**Last updated:** [November 9, 2021, 9:22am UTC](https://discourse.slicer.org/t/applying-a-color-map-to-the-modeltomodel-extension/20528 "2021-11-09T09:22:03Z")

</div>

Ater applying the ModeltoModel distance exentsion on my two segments. I get the bone colored in the RedBlueGreen LUT. I know color red is close and blue is bigger distance but since there is no color scale bar shown ther…

---

## [Dilate/Erode in 2d](https://discourse.slicer.org/t/dilate-erode-in-2d/998)

<div class="topic-metadata">

**Author:** [@bp\_pb](https://discourse.slicer.org/u/bp_pb)\
**Replies:** 8\
**Last updated:** [November 9, 2021, 3:28am UTC](https://discourse.slicer.org/t/dilate-erode-in-2d/998 "2021-11-09T03:28:18Z")

</div>

Hi, I would like to dilate a labelmap only in 2d. The option dilate four/eight unfortunately also take the upper and lower slice into account. Is there any possibility to do this. Thanks for the answer.

---

## [Can't visualize volume created with \`vtkProbeFilter\`](https://discourse.slicer.org/t/cant-visualize-volume-created-with-vtkprobefilter/20532)

<div class="topic-metadata">

**Author:** [@keri](https://discourse.slicer.org/u/keri)\
**Replies:** 4\
**Last updated:** [November 9, 2021, 3:20am UTC](https://discourse.slicer.org/t/cant-visualize-volume-created-with-vtkprobefilter/20532 "2021-11-09T03:20:35Z")

</div>

Hi, Can’t understand why I cannot visualize volume node created with vtkProbeFilter. Here is the example where I create two image data with intersecting areas and different spacings. The second volume I calculate based…

---

## [Merging/Joining two open semi-landmark curves](https://discourse.slicer.org/t/merging-joining-two-open-semi-landmark-curves/20524)

<div class="topic-metadata">

**Author:** [@vaibhav.chhaya](https://discourse.slicer.org/u/vaibhav.chhaya)\
**Replies:** 2\
**Last updated:** [November 9, 2021, 2:30am UTC](https://discourse.slicer.org/t/merging-joining-two-open-semi-landmark-curves/20524 "2021-11-09T02:30:50Z")

</div>

Hi all, Is there a way to merge two different semi landmark curves, such that they share a common landmark?

---

## [How do I integrate these installed extensions into the EXE installation package?  ](https://discourse.slicer.org/t/how-do-i-integrate-these-installed-extensions-into-the-exe-installation-package/20525)

<div class="topic-metadata">

**Author:** [@LuPingChina](https://discourse.slicer.org/u/LuPingChina)\
**Replies:** 1\
**Last updated:** [November 8, 2021, 8:17pm UTC](https://discourse.slicer.org/t/how-do-i-integrate-these-installed-extensions-into-the-exe-installation-package/20525 "2021-11-08T20:17:15Z")

</div>

Operating system:Windows 10 Slicer version:4.13 Expected behavior: Actual behavior: Thank you 3D Slicer for providing such a handy medical imaging software. I have trouble downloading extensions due to network probl…

---

## [Reduction in the number of t.a.c. cuts](https://discourse.slicer.org/t/reduction-in-the-number-of-t-a-c-cuts/20518)

<div class="topic-metadata">

**Author:** [@Carota1965](https://discourse.slicer.org/u/Carota1965)\
**Replies:** 10\
**Last updated:** [November 8, 2021, 5:15pm UTC](https://discourse.slicer.org/t/reduction-in-the-number-of-t-a-c-cuts/20518 "2021-11-08T17:15:34Z")

</div>

hello everyone for a sufficient segmentation not all the files produced by the rx exam are needed. i am trying to selectively reduce the number of files and I wanted to know if 3d slicer does it automatically francesc…

---

## [Connect Plus to the Polaris vicra](https://discourse.slicer.org/t/connect-plus-to-the-polaris-vicra/18461)

<div class="topic-metadata">

**Author:** [@Matteo\_Boles](https://discourse.slicer.org/u/Matteo_Boles)\
**Replies:** 7\
**Last updated:** [November 8, 2021, 4:30pm UTC](https://discourse.slicer.org/t/connect-plus-to-the-polaris-vicra/18461 "2021-11-08T16:30:38Z")

</div>

Hello, I am trying to connect the Polaris Vicra to 3D slicer to be able to read the position of the tip of an instrument, but every time I try to connect the Polaris Vicra with Plus I got the following errors: |WARNING…

---

## [How to change pixel size (Image Spacing) without changing of matrix size](https://discourse.slicer.org/t/how-to-change-pixel-size-image-spacing-without-changing-of-matrix-size/20511)

<div class="topic-metadata">

**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 4\
**Last updated:** [November 8, 2021, 3:41pm UTC](https://discourse.slicer.org/t/how-to-change-pixel-size-image-spacing-without-changing-of-matrix-size/20511 "2021-11-08T15:41:39Z")

</div>

Dear Users and Developers I want to change pixel size (Image Spacing) without changing of matrix size (Image Dimensions). I check some modules such as Resample Scalar Volume and Resize Image. I do not success to do it.…

---

## [Does the " intensity range" mean the "Hounsfield unit" on CT dicom image?](https://discourse.slicer.org/t/does-the-intensity-range-mean-the-hounsfield-unit-on-ct-dicom-image/6765)

<div class="topic-metadata">

**Author:** [@markyang19](https://discourse.slicer.org/u/markyang19)\
**Replies:** 4\
**Last updated:** [November 8, 2021, 2:58pm UTC](https://discourse.slicer.org/t/does-the-intensity-range-mean-the-hounsfield-unit-on-ct-dicom-image/6765 "2021-11-08T14:58:55Z")

</div>

I am trying the segmentation editor by intensity range on my CT dicom image. Does the " intensity range" mean the “Hounsfield unit” on CT dicom image??? I compare the same dicom image on the 3D slicer and other dicom v…

---

## [Segmentation: the default green color is very similiar the bluegreen color](https://discourse.slicer.org/t/segmentation-the-default-green-color-is-very-similiar-the-bluegreen-color/20508)

<div class="topic-metadata">

**Author:** [@tsinesh](https://discourse.slicer.org/u/tsinesh)\
**Replies:** 2\
**Last updated:** [November 8, 2021, 2:39am UTC](https://discourse.slicer.org/t/segmentation-the-default-green-color-is-very-similiar-the-bluegreen-color/20508 "2021-11-08T02:39:05Z")

</div>

in the Segmentation Editor, the blue-green color automatically suggested by Local Threshold (picture 1) is very similar default green color for a new segmentation (picture 2). When I press Ctrl+left mouse to add a sugges…

---

## [Running Slicer without GUI?](https://discourse.slicer.org/t/running-slicer-without-gui/11720)

<div class="topic-metadata">

**Author:** [@lennymartinez](https://discourse.slicer.org/u/lennymartinez)\
**Replies:** 17\
**Last updated:** [November 7, 2021, 11:08pm UTC](https://discourse.slicer.org/t/running-slicer-without-gui/11720 "2021-11-07T23:08:54Z")

</div>

I’ve installed Slicer on an Ubuntu cloud instance (AWS/GCP) and I want to run it with a self-made extension and no GUI… Is there documentation on the slicer site that I’m missing to be able to do this? I’ve found info ab…

---

## [How to get 1D dose profile in 3D slicer](https://discourse.slicer.org/t/how-to-get-1d-dose-profile-in-3d-slicer/20479)

<div class="topic-metadata">

**Author:** [@syxz0628](https://discourse.slicer.org/u/syxz0628)\
**Replies:** 7\
**Last updated:** [November 7, 2021, 6:39pm UTC](https://discourse.slicer.org/t/how-to-get-1d-dose-profile-in-3d-slicer/20479 "2021-11-07T18:39:41Z")

</div>

Operating system: LINUX Slicer version: 4.8.1 Hello, I have loaded DICOM RTdose in Slicer. I want to check the 1D dose profile and if it is possible also want to export the data. Is it possible?

---

## [How to recognize the magnification factor in 3D Viewer](https://discourse.slicer.org/t/how-to-recognize-the-magnification-factor-in-3d-viewer/20520)

<div class="topic-metadata">

**Author:** [@tsinesh](https://discourse.slicer.org/u/tsinesh)\
**Replies:** 1\
**Last updated:** [November 7, 2021, 6:28pm UTC](https://discourse.slicer.org/t/how-to-recognize-the-magnification-factor-in-3d-viewer/20520 "2021-11-07T18:28:57Z")

</div>

I want to place two 3D models side by side. I want them to have the same magnification factor in the 3D Viewer so that I can compare them visually. Where do I get the magnification factor? Thank you for your help

---

## [MONAILabel - MacOS Monterey M1 Pro MacBook Pro (2021)](https://discourse.slicer.org/t/monailabel-macos-monterey-m1-pro-macbook-pro-2021/20507)

<div class="topic-metadata">

**Author:** [@kt297](https://discourse.slicer.org/u/kt297)\
**Replies:** 2\
**Last updated:** [November 6, 2021, 9:01pm UTC](https://discourse.slicer.org/t/monailabel-macos-monterey-m1-pro-macbook-pro-2021/20507 "2021-11-06T21:01:00Z")

</div>

I cannot install MONAI Label extension in 3DSlicer application on MacOS Monterey on a M1 Pro MacBook Pro (2021).

---

## [Warning: 683 of 683 selected files listed in the database cannot be found on disk. see python console for error message Is there anything I can do?](https://discourse.slicer.org/t/warning-683-of-683-selected-files-listed-in-the-database-cannot-be-found-on-disk-see-python-console-for-error-message-is-there-anything-i-can-do/20502)

<div class="topic-metadata">

**Author:** [@CP\_HO](https://discourse.slicer.org/u/CP_HO)\
**Replies:** 1\
**Last updated:** [November 6, 2021, 1:03pm UTC](https://discourse.slicer.org/t/warning-683-of-683-selected-files-listed-in-the-database-cannot-be-found-on-disk-see-python-console-for-error-message-is-there-anything-i-can-do/20502 "2021-11-06T13:03:05Z")

</div>

Operating system: Windows 10 Slicer version: 4.11202 Expected behavior: views in 3 dimension Actual behavior: only one window I had been using 3D slicer for some time with no problem. Recently I ran into some proble…

---

## [How should we load 'Fast marching' since 88673aa in extra effects?](https://discourse.slicer.org/t/how-should-we-load-fast-marching-since-88673aa-in-extra-effects/20505)

<div class="topic-metadata">

**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 1\
**Last updated:** [November 6, 2021, 12:19pm UTC](https://discourse.slicer.org/t/how-should-we-load-fast-marching-since-88673aa-in-extra-effects/20505 "2021-11-06T12:19:33Z")

</div>

Hi, I usually load extra effects with --additional-module-paths. Since 88673aa, Fast Marching no longer works, yielding : File "/home/user/Documents/Slicer4/Custom\_Ext/SlicerSegmentEditorExtraEffects/SegmentEditorFas…

---

## [Error loading GPA module (Slicermorph)](https://discourse.slicer.org/t/error-loading-gpa-module-slicermorph/20501)

<div class="topic-metadata">

**Author:** [@Ale](https://discourse.slicer.org/u/Ale)\
**Replies:** 2\
**Last updated:** [November 5, 2021, 7:39pm UTC](https://discourse.slicer.org/t/error-loading-gpa-module-slicermorph/20501 "2021-11-05T19:39:27Z")

</div>

Hi I did a fresh install of Slicer (4.11.20210226) in a Linux machine (Debian stable branch). I installed Slicermorph trough Extension Manager without a problem. But after restart can’t run GPA module. Running Slicer in …

---

## [Set Specific Lookup Table depending on volume](https://discourse.slicer.org/t/set-specific-lookup-table-depending-on-volume/20486)

<div class="topic-metadata">

**Author:** [@park](https://discourse.slicer.org/u/park)\
**Replies:** 4\
**Last updated:** [November 5, 2021, 4:24pm UTC](https://discourse.slicer.org/t/set-specific-lookup-table-depending-on-volume/20486 "2021-11-05T16:24:55Z")

</div>

Hi all Whenere I read some volumes in the 3D Slicer, It is always pop up as Grey Lookup Table However, I would like to read some particular type (e.g., have specific file name or header) of volumes as different Lookup…

---

## [Segmentation Editor - visualizing the segmented 3D model isssue](https://discourse.slicer.org/t/segmentation-editor-visualizing-the-segmented-3d-model-isssue/20498)

<div class="topic-metadata">

**Author:** [@suranga](https://discourse.slicer.org/u/suranga)\
**Replies:** 1\
**Last updated:** [November 5, 2021, 3:37pm UTC](https://discourse.slicer.org/t/segmentation-editor-visualizing-the-segmented-3d-model-isssue/20498 "2021-11-05T15:37:16Z")

</div>

I used Sementation Editor to segment the right lung from a 3D CT volume, as shown in the screen shot below. However, when I view the 3D model from that, all I see is the painting seeds route. What may be the cause of thi…

---

## [Bad\_alloc error in import open3d](https://discourse.slicer.org/t/bad-alloc-error-in-import-open3d/20199)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 25\
**Last updated:** [November 5, 2021, 4:56am UTC](https://discourse.slicer.org/t/bad-alloc-error-in-import-open3d/20199 "2021-11-05T04:56:16Z")

</div>

Since r30305, we are getting this error after pip\_install(“open3d==0.10.0”). This is on ubuntu 20.04. I believe Bad allocation is an out of memory error, so I assume real error is something else. Any suggestions on how…

---

## [Transform hardening after landmark registration changes number of slices](https://discourse.slicer.org/t/transform-hardening-after-landmark-registration-changes-number-of-slices/20440)

<div class="topic-metadata">

**Author:** [@giovform](https://discourse.slicer.org/u/giovform)\
**Replies:** 3\
**Last updated:** [November 5, 2021, 3:58am UTC](https://discourse.slicer.org/t/transform-hardening-after-landmark-registration-changes-number-of-slices/20440 "2021-11-05T03:58:11Z")

</div>

Hello. I found a strange behavior after hardening a transform that was created using the Landmark Registration module. After using the Landmark Registration module to register (using ThinPlate Registration) any 2D color…

---

## [Removing 3D model to view segmentation](https://discourse.slicer.org/t/removing-3d-model-to-view-segmentation/20493)

<div class="topic-metadata">

**Author:** [@Maddie](https://discourse.slicer.org/u/Maddie)\
**Replies:** 1\
**Last updated:** [November 5, 2021, 3:36am UTC](https://discourse.slicer.org/t/removing-3d-model-to-view-segmentation/20493 "2021-11-05T03:36:04Z")

</div>

Hello all. I had some questions regarding segmentation. I have recently finished segmenting a 3D soft tissue model. The issue I am having is the grey 3D model I had segmented still remains in the image. I have attached a…

---

## [RT STRUCT available. Would like to try a different segmentation on the CT images.](https://discourse.slicer.org/t/rt-struct-available-would-like-to-try-a-different-segmentation-on-the-ct-images/20366)

<div class="topic-metadata">

**Author:** [@MPhilip](https://discourse.slicer.org/u/MPhilip)\
**Replies:** 12\
**Last updated:** [November 4, 2021, 7:51pm UTC](https://discourse.slicer.org/t/rt-struct-available-would-like-to-try-a-different-segmentation-on-the-ct-images/20366 "2021-11-04T19:51:13Z")

</div>

Operating system: Edition Windows 10 Enterprise Version 20H2 OS build 19042.1288 Experience Windows Feature Experience Pack 120.2212.3920.0 Processor: Intel(R) Core™ i5-10310U CPU @ 1.70GHz 2.21 GHz System type: …

---

## [DICOM module not working when used as startup module](https://discourse.slicer.org/t/dicom-module-not-working-when-used-as-startup-module/20474)

<div class="topic-metadata">

**Author:** [@jamieawren](https://discourse.slicer.org/u/jamieawren)\
**Replies:** 7\
**Last updated:** [November 4, 2021, 4:45pm UTC](https://discourse.slicer.org/t/dicom-module-not-working-when-used-as-startup-module/20474 "2021-11-04T16:45:02Z")

</div>

Hi everyone, Overnight, the DICOM module has stopped working, see attached screenshot. I am seeing this error, too Traceback (most recent call last): File “/Applications/Slicer.app/Contents/lib/Slicer-4.11/qt-scripted…

---

## [Segment Editor: unable to restart Grow from Seeds effect from scratch if Volume deleted](https://discourse.slicer.org/t/segment-editor-unable-to-restart-grow-from-seeds-effect-from-scratch-if-volume-deleted/20449)

<div class="topic-metadata">

**Author:** [@DIV](https://discourse.slicer.org/u/DIV)\
**Replies:** 2\
**Last updated:** [November 4, 2021, 1:56am UTC](https://discourse.slicer.org/t/segment-editor-unable-to-restart-grow-from-seeds-effect-from-scratch-if-volume-deleted/20449 "2021-11-04T01:56:19Z")

</div>

The Grow from Seeds effect in the Segment Editor module has a couple of quirky points. First is one small matter: it only considers seeds for Segments that are toggled visible (in the current Segmentation). Actually t…

---

## [Finding Cross-Sectional Areas of Slices](https://discourse.slicer.org/t/finding-cross-sectional-areas-of-slices/20481)

<div class="topic-metadata">

**Author:** [@Katie\_V](https://discourse.slicer.org/u/Katie_V)\
**Replies:** 1\
**Last updated:** [November 3, 2021, 7:08pm UTC](https://discourse.slicer.org/t/finding-cross-sectional-areas-of-slices/20481 "2021-11-03T19:08:14Z")

</div>

Operating system: Windows Slicer version: 4.11 Hello! I am trying to see if I can slice a 3d vessel reconstruction within 3D slicer, and then find the cross-sectional areas of each of those slices. I am aware that I c…

---

## [BoneTexture Extension Help](https://discourse.slicer.org/t/bonetexture-extension-help/20439)

<div class="topic-metadata">

**Author:** [@jamieawren](https://discourse.slicer.org/u/jamieawren)\
**Replies:** 3\
**Last updated:** [November 3, 2021, 2:29pm UTC](https://discourse.slicer.org/t/bonetexture-extension-help/20439 "2021-11-03T14:29:22Z")

</div>

Hello All, I am currently having trouble with the BoneTexture Extension and was hoping that someone may be of help. I have a cranium that I have segmented into 8 segments, and I would like to use the BoneTexture extensi…

[Previous page](https://discourse.slicer.org/c/support/11.md?page=250)

[Next page](https://discourse.slicer.org/c/support/11.md?page=252)