# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=278

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

**Page:** 279

---

## [Critical Qt error on start-up of just-downloaded preview 4.13.0-2021-05-29](https://discourse.slicer.org/t/critical-qt-error-on-start-up-of-just-downloaded-preview-4-13-0-2021-05-29/17913)

<div class="topic-metadata">

**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 1\
**Last updated:** [June 2, 2021, 1:01am UTC](https://discourse.slicer.org/t/critical-qt-error-on-start-up-of-just-downloaded-preview-4-13-0-2021-05-29/17913 "2021-06-02T01:01:16Z")

</div>

On start-up of a freshly downloaded preview release (no extensions, no extra modules added, no actions taken within Slicer after opening), I get a number of errors saying “setViewLabel should be called before setViewNode…

---

## [NVIDIA Clara deepgrow model](https://discourse.slicer.org/t/nvidia-clara-deepgrow-model/17152)

<div class="topic-metadata">

**Author:** [@Wahnfried](https://discourse.slicer.org/u/Wahnfried)\
**Replies:** 9\
**Last updated:** [June 1, 2021, 8:29pm UTC](https://discourse.slicer.org/t/nvidia-clara-deepgrow-model/17152 "2021-06-01T20:29:24Z")

</div>

Hello! When using the NVIDIA Clara AIAA extension, the deepgrow function does not seem to work for me (tested using Slicer 4.11 and Slicer 4.13) as I cannot choose a model to start with; there is no list opening up when…

---

## [Displacement field visualization](https://discourse.slicer.org/t/displacement-field-visualization/17899)

<div class="topic-metadata">

**Author:** [@Loc\_Tran](https://discourse.slicer.org/u/Loc_Tran)\
**Replies:** 2\
**Last updated:** [June 1, 2021, 6:06pm UTC](https://discourse.slicer.org/t/displacement-field-visualization/17899 "2021-06-01T18:06:10Z")

</div>

Hello all, I have one cardiac CT volume and one displacement field. I would like to apply a transform to both the volume node and the displacement field node to see the short axis view of the heart and how the deformati…

---

## [Connect 3D Slicer with python PYNETDICOM library](https://discourse.slicer.org/t/connect-3d-slicer-with-python-pynetdicom-library/17906)

<div class="topic-metadata">

**Author:** [@klm-1992](https://discourse.slicer.org/u/klm-1992)\
**Replies:** 1\
**Last updated:** [June 1, 2021, 4:15pm UTC](https://discourse.slicer.org/t/connect-3d-slicer-with-python-pynetdicom-library/17906 "2021-06-01T16:15:03Z")

</div>

Hi @lassoan, We are trying to connect to 3D slicer with a python script using PYNETDICOM library. We’re able to establish communication but we’re getting an error of connection timeout. Please find code below:- Ple…

---

## [.dcm to .obj conversion - data import](https://discourse.slicer.org/t/dcm-to-obj-conversion-data-import/17900)

<div class="topic-metadata">

**Author:** [@Chandani](https://discourse.slicer.org/u/Chandani)\
**Replies:** 1\
**Last updated:** [June 1, 2021, 2:24pm UTC](https://discourse.slicer.org/t/dcm-to-obj-conversion-data-import/17900 "2021-06-01T14:24:20Z")

</div>

Unable to import .dcm data in the software. wanted some tutorial regarding the same. Also, which version of the slicer to be downloaded.

---

## [Issue with Mesh to Label Map](https://discourse.slicer.org/t/issue-with-mesh-to-label-map/17875)

<div class="topic-metadata">

**Author:** [@quan](https://discourse.slicer.org/u/quan)\
**Replies:** 2\
**Last updated:** [June 1, 2021, 5:18am UTC](https://discourse.slicer.org/t/issue-with-mesh-to-label-map/17875 "2021-06-01T05:18:30Z")

</div>

I’m trying to generate a SPHARM-PDM mesh from a .stl file. I imported the .stl and used “Mesh to Label Map” to obtain the .nrrd. However, the .nrrd is inverted (the white space are supposed to be black and vice versa). T…

---

## [Alignment microCT with MDCT](https://discourse.slicer.org/t/alignment-microct-with-mdct/17870)

<div class="topic-metadata">

**Author:** [@sfglio](https://discourse.slicer.org/u/sfglio)\
**Replies:** 1\
**Last updated:** [June 1, 2021, 5:09am UTC](https://discourse.slicer.org/t/alignment-microct-with-mdct/17870 "2021-06-01T05:09:19Z")

</div>

I have a microCT scan of an implant which I would like to align as good as possible to the same implant in a MDCT scan. My way: manual alignment (using transform) and then segmentation of each implant, export as labelma…

---

## [Transesophageal Probe calibration](https://discourse.slicer.org/t/transesophageal-probe-calibration/17834)

<div class="topic-metadata">

**Author:** [@Gerardo](https://discourse.slicer.org/u/Gerardo)\
**Replies:** 4\
**Last updated:** [June 1, 2021, 2:42am UTC](https://discourse.slicer.org/t/transesophageal-probe-calibration/17834 "2021-06-01T02:42:02Z")

</div>

Dear 3D Slicer community, I am wondering if the steps for freehand tracked ultrasound calibration (Plus applications user manual: Freehand tracked ultrasound calibration application (fCal)) apply for transesophageal ech…

---

## [Extract .jpg from DICOM file](https://discourse.slicer.org/t/extract-jpg-from-dicom-file/17873)

<div class="topic-metadata">

**Author:** [@Manav\_Kothari](https://discourse.slicer.org/u/Manav_Kothari)\
**Replies:** 2\
**Last updated:** [May 31, 2021, 9:39pm UTC](https://discourse.slicer.org/t/extract-jpg-from-dicom-file/17873 "2021-05-31T21:39:28Z")

</div>

I have a DICOM file of the CT scan of an ankle. There are 3 different series in the DICOM file and I wish to extract all the images of one of the series in the required order. Kindly help me understand the steps in the S…

---

## [I want to change the MPR arrow colors](https://discourse.slicer.org/t/i-want-to-change-the-mpr-arrow-colors/17841)

<div class="topic-metadata">

**Author:** [@full\_stack\_master](https://discourse.slicer.org/u/full_stack_master)\
**Replies:** 4\
**Last updated:** [May 31, 2021, 9:18am UTC](https://discourse.slicer.org/t/i-want-to-change-the-mpr-arrow-colors/17841 "2021-05-31T09:18:15Z")

</div>

I want to change the colors of MPR arrows like this image How and where can I control the colors

---

## [CT Image Scan Error](https://discourse.slicer.org/t/ct-image-scan-error/17876)

<div class="topic-metadata">

**Author:** [@caesarsalad](https://discourse.slicer.org/u/caesarsalad)\
**Replies:** 3\
**Last updated:** [May 31, 2021, 2:53am UTC](https://discourse.slicer.org/t/ct-image-scan-error/17876 "2021-05-31T02:53:04Z")

</div>

Hello, I’m trying to load a series of dcm files for a CT scan, but I’m getting an error as follows: 511: 1 \[Scalar Volume\]: Multi-frame image. If slice orientation or spacing is non-uniform then the image may be displa…

---

## [Data uploaded, but visible only in probe (4.10)](https://discourse.slicer.org/t/data-uploaded-but-visible-only-in-probe-4-10/17874)

<div class="topic-metadata">

**Author:** [@Dr\_Cr](https://discourse.slicer.org/u/Dr_Cr)\
**Replies:** 1\
**Last updated:** [May 31, 2021, 1:29am UTC](https://discourse.slicer.org/t/data-uploaded-but-visible-only-in-probe-4-10/17874 "2021-05-31T01:29:11Z")

</div>

Hi there! Not experienced user (1-day), but 4.8. is working, whereas 4.10 the same MRI/PET pictured only in probe… Many thanks!

---

## [Size of buttons in user interface](https://discourse.slicer.org/t/size-of-buttons-in-user-interface/12098)

<div class="topic-metadata">

**Author:** [@ada](https://discourse.slicer.org/u/ada)\
**Replies:** 5\
**Last updated:** [May 30, 2021, 12:42am UTC](https://discourse.slicer.org/t/size-of-buttons-in-user-interface/12098 "2021-05-30T00:42:52Z")

</div>

Hello all, I am writing my own custom module in python but I have some problem to create a custom user interface. I have some (basic) questions about it: Is it possible to define the size (width and height) of a QPus…

---

## [3D Slicer Does Not Open](https://discourse.slicer.org/t/3d-slicer-does-not-open/17829)

<div class="topic-metadata">

**Author:** [@Panos\_Pap](https://discourse.slicer.org/u/Panos_Pap)\
**Replies:** 1\
**Last updated:** [May 28, 2021, 8:51pm UTC](https://discourse.slicer.org/t/3d-slicer-does-not-open/17829 "2021-05-28T20:51:59Z")

</div>

Hi, I’d like to ask why I cannot open the 3D slicer. Until yesterday I was working normally. Today I’m trying to open it and the program does not correspond at all. I added some extentions lately but I restarted the sof…

---

## [Hidden crop when GROW from seeds tool is applied (Segment Editor Module)](https://discourse.slicer.org/t/hidden-crop-when-grow-from-seeds-tool-is-applied-segment-editor-module/17793)

<div class="topic-metadata">

**Author:** [@ond12](https://discourse.slicer.org/u/ond12)\
**Replies:** 5\
**Last updated:** [May 28, 2021, 7:48pm UTC](https://discourse.slicer.org/t/hidden-crop-when-grow-from-seeds-tool-is-applied-segment-editor-module/17793 "2021-05-28T19:48:20Z")

</div>

Hello 3DSlicer forum , I have encountered a weird behavior with the tool “Grow From Seed” in the Segment Editor module : Sometimes when I apply Grow from Seeds , after having painted inside a segment (choosing “inside …

---

## [How to render a volume by vector?](https://discourse.slicer.org/t/how-to-render-a-volume-by-vector/17526)

<div class="topic-metadata">

**Author:** [@Raykie](https://discourse.slicer.org/u/Raykie)\
**Replies:** 6\
**Last updated:** [May 28, 2021, 8:33am UTC](https://discourse.slicer.org/t/how-to-render-a-volume-by-vector/17526 "2021-05-28T08:33:09Z")

</div>

Generally, the volume rendering works based on the intensity of a voxel. What if I need to do it based on a vector (k1, k2)? Thanks!

---

## [Accessing sequence browser proxy node in python for screen recording](https://discourse.slicer.org/t/accessing-sequence-browser-proxy-node-in-python-for-screen-recording/13146)

<div class="topic-metadata">

**Author:** [@ifried01](https://discourse.slicer.org/u/ifried01)\
**Replies:** 3\
**Last updated:** [May 27, 2021, 10:35pm UTC](https://discourse.slicer.org/t/accessing-sequence-browser-proxy-node-in-python-for-screen-recording/13146 "2021-05-27T22:35:38Z")

</div>

Hi, I am trying to use Python to generate screen-recorded videos of actions in Slicer. I am trying to do so by initializing a sequence browser and recording the main 3D view of ‘Camera’ in Python. I can do it manually, …

---

## [Could not load...scalar volume](https://discourse.slicer.org/t/could-not-load-scalar-volume/16758)

<div class="topic-metadata">

**Author:** [@Patrick](https://discourse.slicer.org/u/Patrick)\
**Replies:** 8\
**Last updated:** [May 27, 2021, 7:20pm UTC](https://discourse.slicer.org/t/could-not-load-scalar-volume/16758 "2021-05-27T19:20:39Z")

</div>

Hi, I just updated to the most current version of Slicer. When I tried re-opening my DICOM files, there is a pop-up saying the file cannot be loaded as a scalar volume (I was able to open these files prior to updating).…

---

## [Problem while processing DWI images in Slicer](https://discourse.slicer.org/t/problem-while-processing-dwi-images-in-slicer/17820)

<div class="topic-metadata">

**Author:** [@benxa](https://discourse.slicer.org/u/benxa)\
**Replies:** 1\
**Last updated:** [May 27, 2021, 7:00pm UTC](https://discourse.slicer.org/t/problem-while-processing-dwi-images-in-slicer/17820 "2021-05-27T19:00:30Z")

</div>

Dear experts, I am interested in learning how to use Slicer but I encounter a problem. When I have to indicate the inputs for the processes necessary to carry out the tractography (e.g create a brain mask), my images do …

---

## [Building Slicer from source](https://discourse.slicer.org/t/building-slicer-from-source/17823)

<div class="topic-metadata">

**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 1\
**Last updated:** [May 27, 2021, 3:21pm UTC](https://discourse.slicer.org/t/building-slicer-from-source/17823 "2021-05-27T15:21:11Z")

</div>

I was able to build Slicer following this tutorial I have not tested if all the functionalities work without crash but at least the sliceViews and the 3D View work. I had to change one line of the instructions a little…

---

## [About the scissors tool in the Segment Editor](https://discourse.slicer.org/t/about-the-scissors-tool-in-the-segment-editor/17803)

<div class="topic-metadata">

**Author:** [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Replies:** 1\
**Last updated:** [May 26, 2021, 4:49pm UTC](https://discourse.slicer.org/t/about-the-scissors-tool-in-the-segment-editor/17803 "2021-05-26T16:49:08Z")

</div>

About the scissors tool in the Segment Editor, how to make the edge of the scissors be a relatively smooth line,Scissors can cut round shapes，But I want to crop any smooth arc.

---

## [Virtual reality integrated with medical imaging](https://discourse.slicer.org/t/virtual-reality-integrated-with-medical-imaging/17808)

<div class="topic-metadata">

**Author:** [@Moustapha\_DIOP](https://discourse.slicer.org/u/Moustapha_DIOP)\
**Replies:** 1\
**Last updated:** [May 26, 2021, 2:25pm UTC](https://discourse.slicer.org/t/virtual-reality-integrated-with-medical-imaging/17808 "2021-05-26T14:25:01Z")

</div>

Translated by Google My end-of-cycle topic is called Setting Up a Virtual Reality Solution Integrated with Medical Imaging. For this I would like to create an extension and add an additional module. If there are a few w…

---

## [NRRD or SEG.NRRD ](https://discourse.slicer.org/t/nrrd-or-seg-nrrd/17757)

<div class="topic-metadata">

**Author:** [@GuoFeng\_Lv](https://discourse.slicer.org/u/GuoFeng_Lv)\
**Replies:** 1\
**Last updated:** [May 26, 2021, 4:48am UTC](https://discourse.slicer.org/t/nrrd-or-seg-nrrd/17757 "2021-05-26T04:48:07Z")

</div>

I used 3dslicer to annotate some data. When exporting, there are two formats, seg.nrrd and nrrd. I want to know the difference between the two. If you use python’s simpleITK to read, will the result be different?

---

## [ALPACA in SlicerMorph](https://discourse.slicer.org/t/alpaca-in-slicermorph/17770)

<div class="topic-metadata">

**Author:** [@Morpho\_T](https://discourse.slicer.org/u/Morpho_T)\
**Replies:** 17\
**Last updated:** [May 26, 2021, 12:37am UTC](https://discourse.slicer.org/t/alpaca-in-slicermorph/17770 "2021-05-26T00:37:37Z")

</div>

Hello, I am new to Slicer, tying to learn ALPACA in SlicerMorph. I am following the steps described here. When I click on “Run subsampling”, an error occurs : Import Error: cannot import name ‘registration’ I wonder …

---

## [Memory issue (3d Slicer crashes when writing STL file)](https://discourse.slicer.org/t/memory-issue-3d-slicer-crashes-when-writing-stl-file/17733)

<div class="topic-metadata">

**Author:** [@mikelewis](https://discourse.slicer.org/u/mikelewis)\
**Replies:** 4\
**Last updated:** [May 25, 2021, 7:45pm UTC](https://discourse.slicer.org/t/memory-issue-3d-slicer-crashes-when-writing-stl-file/17733 "2021-05-25T19:45:52Z")

</div>

Hi This is my first post; be gentle with me. I have been using Slicer for a few years to segment CT or MRI scans and extract STL files for use with other CAE tools. I don’t use it extensively, but I have used the proc…

---

## [3D Cropping Volume Rendering](https://discourse.slicer.org/t/3d-cropping-volume-rendering/394)

<div class="topic-metadata">

**Author:** [@cvaughan](https://discourse.slicer.org/u/cvaughan)\
**Replies:** 10\
**Last updated:** [November 3, 2017, 3:46pm UTC](https://discourse.slicer.org/t/3d-cropping-volume-rendering/394 "2017-11-03T15:46:08Z")

</div>

Hi everyone, I'm currently making 3D volume renderings of arteries from a series of OCT images captured during a constant rate pullback within a vessel. The reconstructions look spectacular after some fine-tuning in th…

---

## [Changetracker module is not loaded](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759)

<div class="topic-metadata">

**Author:** [@Chenglin\_Zhu](https://discourse.slicer.org/u/Chenglin_Zhu)\
**Replies:** 3\
**Last updated:** [May 25, 2021, 3:58pm UTC](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759 "2021-05-25T15:58:28Z")

</div>

Hello! I am new to Slicer. After I installed the ChangeTracker extension and restarted the program, I could not open it from the module menu. The module menu says “Changetracker module is not loaded”. Could anyone help…

---

## [Line Intensity profile resolution](https://discourse.slicer.org/t/line-intensity-profile-resolution/17785)

<div class="topic-metadata">

**Author:** [@marianaslicer](https://discourse.slicer.org/u/marianaslicer)\
**Replies:** 1\
**Last updated:** [May 25, 2021, 11:59am UTC](https://discourse.slicer.org/t/line-intensity-profile-resolution/17785 "2021-05-25T11:59:28Z")

</div>

Hi everyone, I would like to calculate the intensity profile along a line. My data has a resolution of 2 mm in the cranio-caudal direction and I don’t want to interpolate any value along the line. Currently, I’m using …

---

## [How to make slice intersection line thicker and change their color?](https://discourse.slicer.org/t/how-to-make-slice-intersection-line-thicker-and-change-their-color/17740)

<div class="topic-metadata">

**Author:** [@NoobForSlicer](https://discourse.slicer.org/u/NoobForSlicer)\
**Replies:** 2\
**Last updated:** [May 25, 2021, 11:31am UTC](https://discourse.slicer.org/t/how-to-make-slice-intersection-line-thicker-and-change-their-color/17740 "2021-05-25T11:31:24Z")

</div>

I guess the title is quite clear… So I have a 4k display and these lines are quite thin… Would there be some way to make them bigger and also change their color?

---

## [ROOM EYE VIEW SlicerRT](https://discourse.slicer.org/t/room-eye-view-slicerrt/17748)

<div class="topic-metadata">

**Author:** [@yoga\_raja](https://discourse.slicer.org/u/yoga_raja)\
**Replies:** 2\
**Last updated:** [May 25, 2021, 10:12am UTC](https://discourse.slicer.org/t/room-eye-view-slicerrt/17748 "2021-05-25T10:12:40Z")

</div>

Hi everyone How to install ROOM EYE VIEW in SlicerRT. Your support will be highly appreciated

[Previous page](https://discourse.slicer.org/c/support/11.md?page=277)

[Next page](https://discourse.slicer.org/c/support/11.md?page=279)