# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=72

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

**Page:** 73

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## [Matching volumes](https://discourse.slicer.org/t/matching-volumes/38515)

<div class="topic-metadata">

**Author:** [@Olivier](https://discourse.slicer.org/u/Olivier)\
**Replies:** 6\
**Last updated:** [October 3, 2024, 9:29am UTC](https://discourse.slicer.org/t/matching-volumes/38515 "2024-10-03T09:29:59Z")

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Hello, Context: I have volumes from the same muscle collected with 3D ultrasound and the IGT link extension, at 2 different time points. Aim: After volume reconstruction, I would like to match the volume orientation …

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## [Units of Beam Properties in SlicerRT extension](https://discourse.slicer.org/t/units-of-beam-properties-in-slicerrt-extension/39493)

<div class="topic-metadata">

**Author:** [@SCJohnson](https://discourse.slicer.org/u/SCJohnson)\
**Replies:** 1\
**Last updated:** [October 3, 2024, 8:56am UTC](https://discourse.slicer.org/t/units-of-beam-properties-in-slicerrt-extension/39493 "2024-10-03T08:56:29Z")

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Good day. I would like to ask what is the unit of the Beams weight in RT slicer for proton therapy? I extracted data from the plan but the units for weight was not specified. Thank you.

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## [3D rendering performance without GPU](https://discourse.slicer.org/t/3d-rendering-performance-without-gpu/37160)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 11\
**Last updated:** [October 3, 2024, 5:08am UTC](https://discourse.slicer.org/t/3d-rendering-performance-without-gpu/37160 "2024-10-03T05:08:03Z")

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I have noticed that when the show 3D is enabled the rendering performance is extremely slow on system without GPU (e.g., CPU only nodes on JetStream). I wouldn’t be too surprised if the volume rendering of the source vo…

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## [Create new series based on orientation](https://discourse.slicer.org/t/create-new-series-based-on-orientation/39497)

<div class="topic-metadata">

**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 2\
**Last updated:** [October 3, 2024, 4:24am UTC](https://discourse.slicer.org/t/create-new-series-based-on-orientation/39497 "2024-10-03T04:24:39Z")

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@lassoan i waste so much time going back and forth playing with orientation of slices e.g parasagitaal 30 20 etc. i need to review images for both sides and different anlge serve different purposes . some purposes rela…

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## [Question on marching cube algorithm](https://discourse.slicer.org/t/question-on-marching-cube-algorithm/39446)

<div class="topic-metadata">

**Author:** [@alientex](https://discourse.slicer.org/u/alientex)\
**Replies:** 3\
**Last updated:** [October 3, 2024, 3:58am UTC](https://discourse.slicer.org/t/question-on-marching-cube-algorithm/39446 "2024-10-03T03:58:21Z")

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Hello, I have changed to the Marching Cube algorithm in the file vtkBinaryLabelmapToClosedSurfaceConversionRule at line 320 in Slicer source. Here’s the output of both algorithms: Marching Cube (green) and Flying Edges …

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## [MRI viewing suggestion](https://discourse.slicer.org/t/mri-viewing-suggestion/39464)

<div class="topic-metadata">

**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 2\
**Last updated:** [October 2, 2024, 3:07pm UTC](https://discourse.slicer.org/t/mri-viewing-suggestion/39464 "2024-10-02T15:07:38Z")

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im new to looking at MRI at 3d slicer. i guess the way MRI is formatted is bit different than CT and im trying to get some way more organized to look at it . the orther sections in MRI looks terrible not like ct . i…

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## [Issue loading a file from a onedrive backed directory](https://discourse.slicer.org/t/issue-loading-a-file-from-a-onedrive-backed-directory/39494)

<div class="topic-metadata">

**Author:** [@Matteboo](https://discourse.slicer.org/u/Matteboo)\
**Replies:** 0\
**Last updated:** [October 2, 2024, 1:43pm UTC](https://discourse.slicer.org/t/issue-loading-a-file-from-a-onedrive-backed-directory/39494 "2024-10-02T13:43:41Z")

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Hello, I’m setting up a new computer and I’m having issues with oneDrive backed data. I’m using the same code and version of slicer on both computer. On the new computer, I get the following error using slicer.util.load…

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## [Distance between point and plane](https://discourse.slicer.org/t/distance-between-point-and-plane/22091)

<div class="topic-metadata">

**Author:** [@Annett](https://discourse.slicer.org/u/Annett)\
**Replies:** 8\
**Last updated:** [October 2, 2024, 1:36pm UTC](https://discourse.slicer.org/t/distance-between-point-and-plane/22091 "2024-10-02T13:36:24Z")

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how can i calculate the distance between a point and a plane? the segment that calculates the distance must be perpendicular to the plane and I’m not able to create it perpendicularly… Thanks!

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## [isotropic expansion](https://discourse.slicer.org/t/isotropic-expansion/39492)

<div class="topic-metadata">

**Author:** [@Farah\_BH](https://discourse.slicer.org/u/Farah_BH)\
**Replies:** 1\
**Last updated:** [October 2, 2024, 12:34pm UTC](https://discourse.slicer.org/t/isotropic-expansion/39492 "2024-10-02T12:34:14Z")

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Hello, I’m trying to expand isotropically a ROI using grow/shrink. The problem is my voxel size is anisotropic \[0.9,0.9,2.5\] and I want to do a 2 mm expansion which is not possible using slicer segment editor (as shown i…

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## [M3 Pro catastrophic crash in volume rendering](https://discourse.slicer.org/t/m3-pro-catastrophic-crash-in-volume-rendering/38564)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 12\
**Last updated:** [October 2, 2024, 2:25am UTC](https://discourse.slicer.org/t/m3-pro-catastrophic-crash-in-volume-rendering/38564 "2024-10-02T02:25:53Z")

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I have this largish dataset (~3.8GB) that I loaded into the Slicer 5.6.2 on my M3 Pro mac. When I dragged the volume from data module to the 3D viewer, Slicer catastrophically crashed and actually caused my Mac to reboot…

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## [Problem with uploading .JPEG Files (PC)](https://discourse.slicer.org/t/problem-with-uploading-jpeg-files-pc/39461)

<div class="topic-metadata">

**Author:** [@caboj](https://discourse.slicer.org/u/caboj)\
**Replies:** 1\
**Last updated:** [October 1, 2024, 4:48am UTC](https://discourse.slicer.org/t/problem-with-uploading-jpeg-files-pc/39461 "2024-10-01T04:48:56Z")

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Operating system: PC Slicer version: 5.6.2 Expected behavior: Uploading CT scans from .JPEG stacks Actual behavior: Unable to process Hello, I am a new 3D slicer user, attempting to use the program to measure volume…

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## [Question on DentalSegmentor memory error](https://discourse.slicer.org/t/question-on-dentalsegmentor-memory-error/39451)

<div class="topic-metadata">

**Author:** [@alientex](https://discourse.slicer.org/u/alientex)\
**Replies:** 2\
**Last updated:** [October 1, 2024, 4:37am UTC](https://discourse.slicer.org/t/question-on-dentalsegmentor-memory-error/39451 "2024-10-01T04:37:38Z")

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Hello, I’ve selected cuda from the following device option in DentalSegmentor: When I click on Apply button, I get the following error: ####################################################################### Please…

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## [Exporting Multiecho MRI data from Slicer](https://discourse.slicer.org/t/exporting-multiecho-mri-data-from-slicer/39458)

<div class="topic-metadata">

**Author:** [@Tejus\_Suren](https://discourse.slicer.org/u/Tejus_Suren)\
**Replies:** 0\
**Last updated:** [September 30, 2024, 8:48pm UTC](https://discourse.slicer.org/t/exporting-multiecho-mri-data-from-slicer/39458 "2024-09-30T20:48:59Z")

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Hello, I have a qDess and a T2-mapping data set that both contain multiple echoes for each scan, and I was wondering if there is a way to export all the echoes after performing image registration within Slicer. At the …

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## [Get the most separated points](https://discourse.slicer.org/t/get-the-most-separated-points/38020)

<div class="topic-metadata">

**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 16\
**Last updated:** [September 30, 2024, 1:42pm UTC](https://discourse.slicer.org/t/get-the-most-separated-points/38020 "2024-09-30T13:42:19Z")

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Hello, Given a cloud of points, what would be the smartest way to determine the two points that are most widely separated? It is possible to loop through all points and calculate the distances between points so as to…

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## [Importing QuPath annotations](https://discourse.slicer.org/t/importing-qupath-annotations/39454)

<div class="topic-metadata">

**Author:** [@NatasjaD](https://discourse.slicer.org/u/NatasjaD)\
**Replies:** 1\
**Last updated:** [September 30, 2024, 1:27pm UTC](https://discourse.slicer.org/t/importing-qupath-annotations/39454 "2024-09-30T13:27:51Z")

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Hi I am segmenting and annotating the different nuclei of the human amygdala on brightfield sections in QuPath and I would like to import these annotations into 3D Slicer. The common file format used for export of QuPath…

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## [Best way to smooth surface of femur segments for FEM](https://discourse.slicer.org/t/best-way-to-smooth-surface-of-femur-segments-for-fem/39453)

<div class="topic-metadata">

**Author:** [@Struan\_Gray](https://discourse.slicer.org/u/Struan_Gray)\
**Replies:** 1\
**Last updated:** [September 30, 2024, 11:45am UTC](https://discourse.slicer.org/t/best-way-to-smooth-surface-of-femur-segments-for-fem/39453 "2024-09-30T11:45:49Z")

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Hi Looking for support as a newbie. I am workong on femur segmentations using totalsegmentator. I am wanting to smooth their surface for mesh and FEM analysis without corrupting the internal voxel analysis- what is the …

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## [Using Scissors in 3D slicer by python script](https://discourse.slicer.org/t/using-scissors-in-3d-slicer-by-python-script/38481)

<div class="topic-metadata">

**Author:** [@khaled](https://discourse.slicer.org/u/khaled)\
**Replies:** 2\
**Last updated:** [September 30, 2024, 11:27am UTC](https://discourse.slicer.org/t/using-scissors-in-3d-slicer-by-python-script/38481 "2024-09-30T11:27:43Z")

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I am working with 3D Slicer for my research. In my work, I manually used the scissors tool to cut a portion of a 3D model that was generated from ultrasound data. Now, I am trying to automate this process using a Python …

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## [Registration of SPECT and CT](https://discourse.slicer.org/t/registration-of-spect-and-ct/39447)

<div class="topic-metadata">

**Author:** [@Santoshaiims](https://discourse.slicer.org/u/Santoshaiims)\
**Replies:** 0\
**Last updated:** [September 30, 2024, 7:11am UTC](https://discourse.slicer.org/t/registration-of-spect-and-ct/39447 "2024-09-30T07:11:43Z")

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I am unable to do elastix registration of SPECT and CT. I attach here the screenshot of transform image after registration Please suggest

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## [Segment substraction changed resolution](https://discourse.slicer.org/t/segment-substraction-changed-resolution/39445)

<div class="topic-metadata">

**Author:** [@LukasKnybel](https://discourse.slicer.org/u/LukasKnybel)\
**Replies:** 0\
**Last updated:** [September 30, 2024, 6:43am UTC](https://discourse.slicer.org/t/segment-substraction-changed-resolution/39445 "2024-09-30T06:43:14Z")

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Dear Slicer community, I often face a situation that when I do “substract” in segment editor (logical operators), the resolution of 1 object is changed. Sometimes changing representation to another and back helps to get…

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## [Bad allocation errors when placing closed curves](https://discourse.slicer.org/t/bad-allocation-errors-when-placing-closed-curves/38519)

<div class="topic-metadata">

**Author:** [@Logan\_Moore](https://discourse.slicer.org/u/Logan_Moore)\
**Replies:** 12\
**Last updated:** [September 29, 2024, 9:43pm UTC](https://discourse.slicer.org/t/bad-allocation-errors-when-placing-closed-curves/38519 "2024-09-29T21:43:55Z")

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Hi all, I wanted to flag a string of bad allocation errors with closed curves in slicer 5.6 to 5.6.2. I am also using Slicermoprh, so perhaps @muratmaga will have an idea of what is going on. I haven’t been able to get…

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## [Cannot segment after using Transforms and Resample Scalar/vectorDWI Volume modules](https://discourse.slicer.org/t/cannot-segment-after-using-transforms-and-resample-scalar-vectordwi-volume-modules/39134)

<div class="topic-metadata">

**Author:** [@Stuart](https://discourse.slicer.org/u/Stuart)\
**Replies:** 2\
**Last updated:** [September 29, 2024, 4:30pm UTC](https://discourse.slicer.org/t/cannot-segment-after-using-transforms-and-resample-scalar-vectordwi-volume-modules/39134 "2024-09-29T16:30:46Z")

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I reoriented a skull using the Transforms module and then Resample Scalar/Vector/DWI Volume module. The resulting volume is properly oriented but I cannot segment it. Here are copies of how I set up the Resample page as …

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## [Aligning different MRI sequences](https://discourse.slicer.org/t/aligning-different-mri-sequences/39438)

<div class="topic-metadata">

**Author:** [@Saman\_Fouladi](https://discourse.slicer.org/u/Saman_Fouladi)\
**Replies:** 0\
**Last updated:** [September 29, 2024, 7:34am UTC](https://discourse.slicer.org/t/aligning-different-mri-sequences/39438 "2024-09-29T07:34:35Z")

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Hello. I have different MRI sequences of each patient in nifti format (T2W, DWI, and ADC). T2W and ADC are in the same direction, but I have to rotate DWI in 180 degrees. I did it by Transforms module and saved the rotat…

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## [Resetting paint draw etc](https://discourse.slicer.org/t/resetting-paint-draw-etc/39028)

<div class="topic-metadata">

**Author:** [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Replies:** 1\
**Last updated:** [September 29, 2024, 1:17am UTC](https://discourse.slicer.org/t/resetting-paint-draw-etc/39028 "2024-09-29T01:17:22Z")

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3D slicer version 6.6.1 windows Have increased resolution of CT scan using Crop volume. However, when using segment editor, paint and draw “thickness” still seems to be the original “thickness” pre - crop volume change…

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## [Showing a 2D dicom image in 3d view of slicer](https://discourse.slicer.org/t/showing-a-2d-dicom-image-in-3d-view-of-slicer/38566)

<div class="topic-metadata">

**Author:** [@ebin1234](https://discourse.slicer.org/u/ebin1234)\
**Replies:** 2\
**Last updated:** [September 28, 2024, 12:54pm UTC](https://discourse.slicer.org/t/showing-a-2d-dicom-image-in-3d-view-of-slicer/38566 "2024-09-28T12:54:25Z")

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Hello, I have a doubt regarding about showing a 2d dicom image in 3d view. What are the steps I have to take for showing a 2d dicom image in 3d view?. Could you please guide me to solve this issue?. I am attaching the …

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## [Aortic Diameter Measurement - MIS or CE more accurate?](https://discourse.slicer.org/t/aortic-diameter-measurement-mis-or-ce-more-accurate/38572)

<div class="topic-metadata">

**Author:** [@Joe\_Makoid](https://discourse.slicer.org/u/Joe_Makoid)\
**Replies:** 4\
**Last updated:** [September 27, 2024, 9:38pm UTC](https://discourse.slicer.org/t/aortic-diameter-measurement-mis-or-ce-more-accurate/38572 "2024-09-27T21:38:16Z")

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Hello, . I am segmenting the entire aorta and running a centerline extraction then analyzing it in cross-section analysis module. The MIS diameter and CE diameter seem to be materially different at some locations (spec…

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## [Screenshot function](https://discourse.slicer.org/t/screenshot-function/38416)

<div class="topic-metadata">

**Author:** [@j.v.d](https://discourse.slicer.org/u/j.v.d)\
**Replies:** 3\
**Last updated:** [September 27, 2024, 12:57pm UTC](https://discourse.slicer.org/t/screenshot-function/38416 "2024-09-27T12:57:20Z")

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Hi there ! After some Registration I wanted to export some single pictures in the JPEG or PNG or TIF format. I´m using the Version 5.0.3. There used to be a Camera-Icon on the taskbar on top with this function on earlie…

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## [Synchronizing different MRI sequences](https://discourse.slicer.org/t/synchronizing-different-mri-sequences/38568)

<div class="topic-metadata">

**Author:** [@Saman\_Fouladi](https://discourse.slicer.org/u/Saman_Fouladi)\
**Replies:** 0\
**Last updated:** [September 27, 2024, 10:41am UTC](https://discourse.slicer.org/t/synchronizing-different-mri-sequences/38568 "2024-09-27T10:41:14Z")

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Hello. I have 3 questions. I want to open three MRI sequences and synchronizing them in 3D Slicer. For example when I move among slides of T2W, this movement should happen for other sequences as well. In addition I nee…

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## [Question on volume rendering parameters](https://discourse.slicer.org/t/question-on-volume-rendering-parameters/38557)

<div class="topic-metadata">

**Author:** [@alientex](https://discourse.slicer.org/u/alientex)\
**Replies:** 3\
**Last updated:** [September 27, 2024, 9:56am UTC](https://discourse.slicer.org/t/question-on-volume-rendering-parameters/38557 "2024-09-27T09:56:16Z")

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Hello, Below are the parameters of the volume rendering module: I want to use the parameters specifically the Rendering, Quality, and Interactive Speed for the 3D view of segmentations instead of volume rendering. …

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## [Question on 3D rendering in Slicer](https://discourse.slicer.org/t/question-on-3d-rendering-in-slicer/38494)

<div class="topic-metadata">

**Author:** [@alientex](https://discourse.slicer.org/u/alientex)\
**Replies:** 6\
**Last updated:** [September 27, 2024, 4:05am UTC](https://discourse.slicer.org/t/question-on-3d-rendering-in-slicer/38494 "2024-09-27T04:05:40Z")

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Hello all, I am aware that Slicer uses the VTK library for rendering. I have read a few sources on the internet that describe how VTK uses the OpenGL graphics library by default. Therefore, I believe there is no doubt t…

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## [Threshold range lower value script vs GUI](https://discourse.slicer.org/t/threshold-range-lower-value-script-vs-gui/38563)

<div class="topic-metadata">

**Author:** [@G\_Tom](https://discourse.slicer.org/u/G_Tom)\
**Replies:** 0\
**Last updated:** [September 26, 2024, 9:25pm UTC](https://discourse.slicer.org/t/threshold-range-lower-value-script-vs-gui/38563 "2024-09-26T21:25:38Z")

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hi, I am using a python script to threshold an image after first testing in the GUI. I am noticing that the threshold behaves differently ( different results) between the script and when doing threshold in the GUI. The…

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