# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=254

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

**Page:** 255

---

## [Isodose Generation](https://discourse.slicer.org/t/isodose-generation/20115)

<div class="topic-metadata">

**Author:** [@Cody\_Xie](https://discourse.slicer.org/u/Cody_Xie)\
**Replies:** 11\
**Last updated:** [October 20, 2021, 5:52pm UTC](https://discourse.slicer.org/t/isodose-generation/20115 "2021-10-20T17:52:18Z")

</div>

Hi all, I would like to create isodose and the color bar. I followed the isodose tutorial (SlicerRtDoc/tutorials/SlicerRT\_Tutorial\_Isodose.pptx at master · SlicerRt/SlicerRtDoc · GitHub). However, in the Isodose feature…

---

## [Predefined Labels for segmentations](https://discourse.slicer.org/t/predefined-labels-for-segmentations/20267)

<div class="topic-metadata">

**Author:** [@sronen71](https://discourse.slicer.org/u/sronen71)\
**Replies:** 0\
**Last updated:** [October 20, 2021, 4:03pm UTC](https://discourse.slicer.org/t/predefined-labels-for-segmentations/20267 "2021-10-20T16:03:51Z")

</div>

We want to segment a few hundred 3D CT volumes, all with same labels and colors. I know how to create label names and colors for one segmentation. How can I reuse it, and also share with others, for labeling all volumes…

---

## [Calculating volumes from image stacks, scale does not match up.](https://discourse.slicer.org/t/calculating-volumes-from-image-stacks-scale-does-not-match-up/20133)

<div class="topic-metadata">

**Author:** [@Jeroen\_n](https://discourse.slicer.org/u/Jeroen_n)\
**Replies:** 3\
**Last updated:** [October 20, 2021, 3:13pm UTC](https://discourse.slicer.org/t/calculating-volumes-from-image-stacks-scale-does-not-match-up/20133 "2021-10-20T15:13:38Z")

</div>

Im working on a project where i need to determine the volume of fibrosis in cochlea’s. the raw data consists of +/- 100 microscopic photo’s of the cut up cochlea that i aligned and stacked in order(.tiff file). I coloure…

---

## [Data module: remember previous zoom & pan & slice selection when making a volume visible](https://discourse.slicer.org/t/data-module-remember-previous-zoom-pan-slice-selection-when-making-a-volume-visible/20234)

<div class="topic-metadata">

**Author:** [@DIV](https://discourse.slicer.org/u/DIV)\
**Replies:** 5\
**Last updated:** [October 20, 2021, 12:53pm UTC](https://discourse.slicer.org/t/data-module-remember-previous-zoom-pan-slice-selection-when-making-a-volume-visible/20234 "2021-10-20T12:53:00Z")

</div>

In the Data module if a different Volume is made visible, the full field of view of that Volume is displayed in each orthogonal slice, for the middle slice in the respective series. I would prefer either one of the foll…

---

## [Extract sub-segment from segmentation based on seed and volume (in Python)](https://discourse.slicer.org/t/extract-sub-segment-from-segmentation-based-on-seed-and-volume-in-python/20196)

<div class="topic-metadata">

**Author:** [@kkkkkkk123](https://discourse.slicer.org/u/kkkkkkk123)\
**Replies:** 4\
**Last updated:** [October 20, 2021, 5:46am UTC](https://discourse.slicer.org/t/extract-sub-segment-from-segmentation-based-on-seed-and-volume-in-python/20196 "2021-10-20T05:46:07Z")

</div>

Hi everyone, I’m currently having a segmented image, but now I want to create a new (sub-)segmentation from the segmented image based on an initial seed point (x,y,z) and with a given volume threshold, e.g. max 20 cc. I…

---

## [Converting MarkupsCurve to MarkupsFiducial](https://discourse.slicer.org/t/converting-markupscurve-to-markupsfiducial/20246)

<div class="topic-metadata">

**Author:** [@kmalexander](https://discourse.slicer.org/u/kmalexander)\
**Replies:** 2\
**Last updated:** [October 20, 2021, 5:38am UTC](https://discourse.slicer.org/t/converting-markupscurve-to-markupsfiducial/20246 "2021-10-20T05:38:46Z")

</div>

I’ve imported a brachytherapy treatment plan that includes a MarkupsCurve for each catheter. I’m looking to convert each of these into models (ultimately, individual segments). I can copy and paste all the control poin…

---

## [Resize / Scaling Models](https://discourse.slicer.org/t/resize-scaling-models/20253)

<div class="topic-metadata">

**Author:** [@IzzyRobb](https://discourse.slicer.org/u/IzzyRobb)\
**Replies:** 1\
**Last updated:** [October 20, 2021, 4:54am UTC](https://discourse.slicer.org/t/resize-scaling-models/20253 "2021-10-20T04:54:33Z")

</div>

Hi, I’m trying to rescale a model to specific ratios (similar to photoshop’s image size function) and was wondering if there is a way to do this? I have been using the scale feature in slicerFab before I generate bitmaps…

---

## [Remove a number of CT cuts using 3D Slicer](https://discourse.slicer.org/t/remove-a-number-of-ct-cuts-using-3d-slicer/20254)

<div class="topic-metadata">

**Author:** [@aseman](https://discourse.slicer.org/u/aseman)\
**Replies:** 1\
**Last updated:** [October 20, 2021, 4:51am UTC](https://discourse.slicer.org/t/remove-a-number-of-ct-cuts-using-3d-slicer/20254 "2021-10-20T04:51:35Z")

</div>

Operating system: linux Slicer version: 4.10.2 Hi 3D Slicer experts and all I have some CT images (for example 80 cuts) and I want to delete some of them (for example 16 cuts). How can I do this with 3D Slicer? Thank…

---

## [Volumes module:  allow user to define their own preset Display configuration(s)](https://discourse.slicer.org/t/volumes-module-allow-user-to-define-their-own-preset-display-configuration-s/20235)

<div class="topic-metadata">

**Author:** [@DIV](https://discourse.slicer.org/u/DIV)\
**Replies:** 1\
**Last updated:** [October 20, 2021, 2:58am UTC](https://discourse.slicer.org/t/volumes-module-allow-user-to-define-their-own-preset-display-configuration-s/20235 "2021-10-20T02:58:01Z")

</div>

Currently in the Volumes module there are seven preset Display configurations: CT-bone, CT-air, …, DTI. It would be nice to allow users to define their own preset Display configuration(s). I independently figured out …

---

## [What happens to the extensions in the current stable once a new one is released?](https://discourse.slicer.org/t/what-happens-to-the-extensions-in-the-current-stable-once-a-new-one-is-released/20250)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [October 20, 2021, 2:46am UTC](https://discourse.slicer.org/t/what-happens-to-the-extensions-in-the-current-stable-once-a-new-one-is-released/20250 "2021-10-20T02:46:18Z")

</div>

Assuming there will soon be a new stable release of Slicer, we need to understand what happens to the previous (current) stable and its extensions? My understanding is that the extensions for r29738 (current stable) wil…

---

## [How to show orientation marker/label? (Left/Right/Anterior/Posterior)](https://discourse.slicer.org/t/how-to-show-orientation-marker-label-left-right-anterior-posterior/20231)

<div class="topic-metadata">

**Author:** [@crystal6tak](https://discourse.slicer.org/u/crystal6tak)\
**Replies:** 1\
**Last updated:** [October 20, 2021, 2:43am UTC](https://discourse.slicer.org/t/how-to-show-orientation-marker-label-left-right-anterior-posterior/20231 "2021-10-20T02:43:27Z")

</div>

Basically this (the green letters I added onto the screenshot) Kind of a silly question but I can’t find it anywhere myself nor find any topic online haha.

---

## [Reloading a texturized model into Slicer with textures](https://discourse.slicer.org/t/reloading-a-texturized-model-into-slicer-with-textures/20244)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 15\
**Last updated:** [October 19, 2021, 11:24pm UTC](https://discourse.slicer.org/t/reloading-a-texturized-model-into-slicer-with-textures/20244 "2021-10-19T23:24:09Z")

</div>

I use the TextureModel module from IGT to texturize the surface scans. I tried saving them as OBJ hoping that the textures were remembered next time, but it didn’t. What is the proper way of saving these models with text…

---

## [How read the .tag file for landmarks visualization](https://discourse.slicer.org/t/how-read-the-tag-file-for-landmarks-visualization/7487)

<div class="topic-metadata">

**Author:** [@ljc19800331](https://discourse.slicer.org/u/ljc19800331)\
**Replies:** 3\
**Last updated:** [October 19, 2021, 2:11pm UTC](https://discourse.slicer.org/t/how-read-the-tag-file-for-landmarks-visualization/7487 "2021-10-19T14:11:05Z")

</div>

Operating system: Windows 10 Slicer version: 4.10.2 Expected behavior: Hello, I want to check the fiducial on the ultrasound and MRI data and all the fiducials are saved in a .tag file. Since it is not a common .fcsv …

---

## [Display Model in 3D view via a Python module](https://discourse.slicer.org/t/display-model-in-3d-view-via-a-python-module/20224)

<div class="topic-metadata">

**Author:** [@Karthik](https://discourse.slicer.org/u/Karthik)\
**Replies:** 1\
**Last updated:** [October 19, 2021, 9:53am UTC](https://discourse.slicer.org/t/display-model-in-3d-view-via-a-python-module/20224 "2021-10-19T09:53:56Z")

</div>

Operating system: Ubuntu 20.04 Slicer version: 4.11.20210226 I am writing a python module for 3D Slicer. I have a surface (vtkPolyData). I want to display this in the 3D view. I know how to do this with a volume, i.e. …

---

## [How to create trabecular-porous structure](https://discourse.slicer.org/t/how-to-create-trabecular-porous-structure/20204)

<div class="topic-metadata">

**Author:** [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Replies:** 1\
**Last updated:** [October 19, 2021, 3:31am UTC](https://discourse.slicer.org/t/how-to-create-trabecular-porous-structure/20204 "2021-10-19T03:31:13Z")

</div>

As shown in the picture below, this is a piece of bone, which is randomly filled with this honeycomb-like shape. This structure can be directly 3D printed. This is a simulated trabecular bone. Can we create this kind…

---

## [3D volume of the upper airways in STL file](https://discourse.slicer.org/t/3d-volume-of-the-upper-airways-in-stl-file/20212)

<div class="topic-metadata">

**Author:** [@Rebecca\_Napolitano](https://discourse.slicer.org/u/Rebecca_Napolitano)\
**Replies:** 1\
**Last updated:** [October 18, 2021, 7:15pm UTC](https://discourse.slicer.org/t/3d-volume-of-the-upper-airways-in-stl-file/20212 "2021-10-18T19:15:23Z")

</div>

We created a 3D volume of the upper airways with “grow from seeds”. We wanted to export the volume in stl. When we try to do export the volume, we obtain only the four line of the “paint” and not the entire volume. How c…

---

## [Cell Normals Array](https://discourse.slicer.org/t/cell-normals-array/20206)

<div class="topic-metadata">

**Author:** [@adamy](https://discourse.slicer.org/u/adamy)\
**Replies:** 1\
**Last updated:** [October 18, 2021, 4:20pm UTC](https://discourse.slicer.org/t/cell-normals-array/20206 "2021-10-18T16:20:10Z")

</div>

The surface models module creates point normals by default. How can I create an array containing normals of all of the cells (not point normals)?

---

## [NVIDIA AIAA error when using auto-segmentation (modle: clara\_pt\_liver\_and\_tumor\_CT\_segmentation)](https://discourse.slicer.org/t/nvidia-aiaa-error-when-using-auto-segmentation-modle-clara-pt-liver-and-tumor-ct-segmentation/20197)

<div class="topic-metadata">

**Author:** [@twsheng](https://discourse.slicer.org/u/twsheng)\
**Replies:** 2\
**Last updated:** [October 17, 2021, 10:55pm UTC](https://discourse.slicer.org/t/nvidia-aiaa-error-when-using-auto-segmentation-modle-clara-pt-liver-and-tumor-ct-segmentation/20197 "2021-10-17T22:55:15Z")

</div>

Hello everyone, Could anyone help me with this error message when using the Nvidia Segmentation extension? Traceback (most recent call last): File "/Applications/Slicer.app/Contents/Extensions-30160/NvidiaAIAssistedA…

---

## [If I copy all the slicer files to a new computer without the original dicom file will I be able to work?  ](https://discourse.slicer.org/t/if-i-copy-all-the-slicer-files-to-a-new-computer-without-the-original-dicom-file-will-i-be-able-to-work/20178)

<div class="topic-metadata">

**Author:** [@MANAV\_DIVEKAR](https://discourse.slicer.org/u/MANAV_DIVEKAR)\
**Replies:** 1\
**Last updated:** [October 17, 2021, 1:21pm UTC](https://discourse.slicer.org/t/if-i-copy-all-the-slicer-files-to-a-new-computer-without-the-original-dicom-file-will-i-be-able-to-work/20178 "2021-10-17T13:21:28Z")

</div>

I am try to work remotely on a project if I was able to copy just the slicer file and work it would be easier.

---

## [Clipping Tractography](https://discourse.slicer.org/t/clipping-tractography/8129)

<div class="topic-metadata">

**Author:** [@cindy](https://discourse.slicer.org/u/cindy)\
**Replies:** 4\
**Last updated:** [October 17, 2021, 1:25am UTC](https://discourse.slicer.org/t/clipping-tractography/8129 "2021-10-17T01:25:13Z")

</div>

Hi all, I’m looking for help to clip out a certain portion of a tract. Thus far, I have created a mask at the root entry zone of the trigeminal nerve and used it for tractography seeding. I know have a fiber bundle, ho…

---

## [How to choose ROI?](https://discourse.slicer.org/t/how-to-choose-roi/20186)

<div class="topic-metadata">

**Author:** [@neurohuo](https://discourse.slicer.org/u/neurohuo)\
**Replies:** 0\
**Last updated:** [October 16, 2021, 10:29pm UTC](https://discourse.slicer.org/t/how-to-choose-roi/20186 "2021-10-16T22:29:02Z")

</div>

Hi, friends, I want to track facial nerve in Vestibular schwannoma patients. But in the step of ‘tractography seeding’, I always can’t choose the right ROI in Editor module or put the right fiducial. The target ROIs are …

---

## [Dose will be distorted when creating isodose surfaces](https://discourse.slicer.org/t/dose-will-be-distorted-when-creating-isodose-surfaces/20129)

<div class="topic-metadata">

**Author:** [@Cody\_Xie](https://discourse.slicer.org/u/Cody_Xie)\
**Replies:** 3\
**Last updated:** [October 15, 2021, 7:40pm UTC](https://discourse.slicer.org/t/dose-will-be-distorted-when-creating-isodose-surfaces/20129 "2021-10-15T19:40:56Z")

</div>

Dear All, I am using SlicerRT plug-in, and I would like to create isodose surfaces. However, just after clicking “Create isodose surfaces”, I found that the dose was distorted automatically. The two screenshots below …

---

## [Error when trying to import .fcsv files into R](https://discourse.slicer.org/t/error-when-trying-to-import-fcsv-files-into-r/20167)

<div class="topic-metadata">

**Author:** [@KassandraFord](https://discourse.slicer.org/u/KassandraFord)\
**Replies:** 3\
**Last updated:** [October 15, 2021, 7:12pm UTC](https://discourse.slicer.org/t/error-when-trying-to-import-fcsv-files-into-r/20167 "2021-10-15T19:12:49Z")

</div>

Operating system: Windows Slicer version: 4.13.0 2021-09-28 Expected behavior: Normal import of landmark files from 3D Slicer into R. Actual behavior: I have exported .fscv files many times previously, but with my mos…

---

## [Realtime needle tracking](https://discourse.slicer.org/t/realtime-needle-tracking/20134)

<div class="topic-metadata">

**Author:** [@riep](https://discourse.slicer.org/u/riep)\
**Replies:** 2\
**Last updated:** [October 15, 2021, 3:35pm UTC](https://discourse.slicer.org/t/realtime-needle-tracking/20134 "2021-10-15T15:35:14Z")

</div>

Hi everyone, We are looking for an application that could use as input a 3D MRI volume and output the location of a needle/probe in the volume. Basically, the algorithm would be looking for straight dark regions in the …

---

## [Computing and accessing normals from cells instead of points](https://discourse.slicer.org/t/computing-and-accessing-normals-from-cells-instead-of-points/20174)

<div class="topic-metadata">

**Author:** [@adamy](https://discourse.slicer.org/u/adamy)\
**Replies:** 0\
**Last updated:** [October 15, 2021, 3:25pm UTC](https://discourse.slicer.org/t/computing-and-accessing-normals-from-cells-instead-of-points/20174 "2021-10-15T15:25:29Z")

</div>

Hi all, I am very new to using Slicer. I would like to generate normals for each cell instead of the default point normals. I have been able to set the cell normals flag on (and the point cell normals flag off) in the p…

---

## [Combine 3 scalar volumes into a vector](https://discourse.slicer.org/t/combine-3-scalar-volumes-into-a-vector/20172)

<div class="topic-metadata">

**Author:** [@Jonathan\_Lesage](https://discourse.slicer.org/u/Jonathan_Lesage)\
**Replies:** 0\
**Last updated:** [October 15, 2021, 2:25am UTC](https://discourse.slicer.org/t/combine-3-scalar-volumes-into-a-vector/20172 "2021-10-15T02:25:21Z")

</div>

Hi Andras, Is it possible to combine 3 scalar volumes into a vector volume directly in Slicer (using the GUI) ? Is this what you were referring to here? Thanks, Jon

---

## [In developing a loadable module, how can I use the screen on the right except ui on the left side of the display module?](https://discourse.slicer.org/t/in-developing-a-loadable-module-how-can-i-use-the-screen-on-the-right-except-ui-on-the-left-side-of-the-display-module/20162)

<div class="topic-metadata">

**Author:** [@kookoo9999](https://discourse.slicer.org/u/kookoo9999)\
**Replies:** 0\
**Last updated:** [October 15, 2021, 12:29am UTC](https://discourse.slicer.org/t/in-developing-a-loadable-module-how-can-i-use-the-screen-on-the-right-except-ui-on-the-left-side-of-the-display-module/20162 "2021-10-15T00:29:09Z")

</div>

Thank you so much for your help every time @lassoan . This weekend, I’m going to try the Simple ITK-related Error Fix that you mentioned last time. In developing a loadable module, how can I use the screen on the right…

---

## [Cropping spatial transformation](https://discourse.slicer.org/t/cropping-spatial-transformation/20145)

<div class="topic-metadata">

**Author:** [@Ndzimbong\_William\_Br](https://discourse.slicer.org/u/Ndzimbong_William_Br)\
**Replies:** 2\
**Last updated:** [October 14, 2021, 8:39pm UTC](https://discourse.slicer.org/t/cropping-spatial-transformation/20145 "2021-10-14T20:39:59Z")

</div>

Hi, Please, is it possible to get (and save) to spatial transformation applied when cropping a volume ? I mean, as the cropping is a spatial transformation, is it possible the get (save) in any form (matrix, parameters…

---

## [Simple ITK ImageStacks Error](https://discourse.slicer.org/t/simple-itk-imagestacks-error/20106)

<div class="topic-metadata">

**Author:** [@Rosalee\_Elting](https://discourse.slicer.org/u/Rosalee_Elting)\
**Replies:** 10\
**Last updated:** [October 14, 2021, 5:44pm UTC](https://discourse.slicer.org/t/simple-itk-imagestacks-error/20106 "2021-10-14T17:44:36Z")

</div>

Os: Windows 10 Pro Slicer version: 4.11.20210226 All extensions updated. I am trying to load CT data slices using ImageStacks. I get the following error when I try any slices, and when I try to generate a preview and …

---

## [Loading nifti images into slicer in real time](https://discourse.slicer.org/t/loading-nifti-images-into-slicer-in-real-time/20104)

<div class="topic-metadata">

**Author:** [@saikatsengupta](https://discourse.slicer.org/u/saikatsengupta)\
**Replies:** 6\
**Last updated:** [October 14, 2021, 4:39pm UTC](https://discourse.slicer.org/t/loading-nifti-images-into-slicer-in-real-time/20104 "2021-10-14T16:39:08Z")

</div>

Hello, I am new to slicer and am just getting familiar with this powerful software. A big thanks to all who developed this and continue to support it. I am working on a problem where I need to visualize images in slice…

[Previous page](https://discourse.slicer.org/c/support/11.md?page=253)

[Next page](https://discourse.slicer.org/c/support/11.md?page=255)