# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=340

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

**Page:** 341

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## [Problems Opening OCT Images](https://discourse.slicer.org/t/problems-opening-oct-images/11611)

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**Author:** [@namezlezz](https://discourse.slicer.org/u/namezlezz)\
**Replies:** 1\
**Last updated:** [May 19, 2020, 10:04am UTC](https://discourse.slicer.org/t/problems-opening-oct-images/11611 "2020-05-19T10:04:50Z")

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Hi was trying to open an optical coherence tomography dicom file but this error message pops up: Can i check if this means there is anything wrong with my image file?

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## [Question related to ROI: preset voxel count or edge length in a square(rectangle effect) roi](https://discourse.slicer.org/t/question-related-to-roi-preset-voxel-count-or-edge-length-in-a-square-rectangle-effect-roi/11557)

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**Author:** [@kowloon](https://discourse.slicer.org/u/kowloon)\
**Replies:** 1\
**Last updated:** [May 18, 2020, 6:08pm UTC](https://discourse.slicer.org/t/question-related-to-roi-preset-voxel-count-or-edge-length-in-a-square-rectangle-effect-roi/11557 "2020-05-18T18:08:32Z")

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Operating system: Windows 10 Slicer version: 4.10.2 My problem is about drawing a rectangular ROI into a computed tomography. I have already drawn round ROIs, now I want to draw the same voxelcount as rectangular ROIs.…

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## [Scissors are not working in slicer in 4.10.2 kindly help](https://discourse.slicer.org/t/scissors-are-not-working-in-slicer-in-4-10-2-kindly-help/11596)

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**Author:** [@shivaprasad\_kolur](https://discourse.slicer.org/u/shivaprasad_kolur)\
**Replies:** 8\
**Last updated:** [May 18, 2020, 5:22pm UTC](https://discourse.slicer.org/t/scissors-are-not-working-in-slicer-in-4-10-2-kindly-help/11596 "2020-05-18T17:22:28Z")

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scissors are not working in slicer 4.10.2 kindly help

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## [About fast marching](https://discourse.slicer.org/t/about-fast-marching/11584)

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**Author:** [@anitakh1](https://discourse.slicer.org/u/anitakh1)\
**Replies:** 2\
**Last updated:** [May 18, 2020, 3:08pm UTC](https://discourse.slicer.org/t/about-fast-marching/11584 "2020-05-18T15:08:59Z")

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i was following https://www.youtube.com/watch?v=tJMGe3FMTk0 and wanted to try similar thing but fast marching is not in the slicer i downloaded. i have slicer 4.8.1, 4.10and now downloaded 4.11.0 preview release but can’…

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## [Change colour of the ruler in the 3D orthographic model](https://discourse.slicer.org/t/change-colour-of-the-ruler-in-the-3d-orthographic-model/11526)

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**Author:** [@DanielBF](https://discourse.slicer.org/u/DanielBF)\
**Replies:** 6\
**Last updated:** [May 18, 2020, 10:01am UTC](https://discourse.slicer.org/t/change-colour-of-the-ruler-in-the-3d-orthographic-model/11526 "2020-05-18T10:01:57Z")

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Dear all, First of all, I would like to take this opportunity to congratulate you in the making of this excellent software. It is helping me a lot in achieving my segmentation tasks and creating high quality images. I …

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## [Scissors are not working in slicer in kindly help](https://discourse.slicer.org/t/scissors-are-not-working-in-slicer-in-kindly-help/11597)

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**Author:** [@shivaprasad\_kolur](https://discourse.slicer.org/u/shivaprasad_kolur)\
**Replies:** 0\
**Last updated:** [May 18, 2020, 7:53am UTC](https://discourse.slicer.org/t/scissors-are-not-working-in-slicer-in-kindly-help/11597 "2020-05-18T07:53:01Z")

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Operating system:windows Slicer version:4.10.2 and 4.11 preview sequence of steps loaded sample CTChest opened module segment editor created two segments created a mask by using threshold to seperate out the airway…

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## [My slicer keeps crashing!](https://discourse.slicer.org/t/my-slicer-keeps-crashing/11578)

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**Author:** [@shivaprasad\_kolur](https://discourse.slicer.org/u/shivaprasad_kolur)\
**Replies:** 1\
**Last updated:** [May 17, 2020, 3:01pm UTC](https://discourse.slicer.org/t/my-slicer-keeps-crashing/11578 "2020-05-17T15:01:49Z")

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my slicer keeps crashing whenever i open region type display from the modules…plz fix it

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## [Segment Threshold](https://discourse.slicer.org/t/segment-threshold/11366)

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**Author:** [@Jini](https://discourse.slicer.org/u/Jini)\
**Replies:** 6\
**Last updated:** [April 30, 2020, 6:53pm UTC](https://discourse.slicer.org/t/segment-threshold/11366 "2020-04-30T18:53:37Z")

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Hello, I scanned a object with lot of measurements and using CT. When I was segmentation this data I see that all measurements have different thresholds. Why the threshold is not same for every measurement? It’s the sam…

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## [Diffusion volume loading](https://discourse.slicer.org/t/diffusion-volume-loading/11583)

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**Author:** [@Margherita\_Mottola](https://discourse.slicer.org/u/Margherita_Mottola)\
**Replies:** 0\
**Last updated:** [May 8, 2020, 7:47am UTC](https://discourse.slicer.org/t/diffusion-volume-loading/11583 "2020-05-08T07:47:33Z")

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## [Save files from loaded node ID in batch mode](https://discourse.slicer.org/t/save-files-from-loaded-node-id-in-batch-mode/11511)

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**Author:** [@rickychen](https://discourse.slicer.org/u/rickychen)\
**Replies:** 4\
**Last updated:** [May 16, 2020, 10:20pm UTC](https://discourse.slicer.org/t/save-files-from-loaded-node-id-in-batch-mode/11511 "2020-05-16T22:20:46Z")

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Hi guys, I’m trying to follow the source codes for loading DICOM files as here: Example: load all data from a DICOM folder (using a temporary DICOM database) dicomDataDir = “c:/my/folder/with/dicom-files” # input fol…

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## [Way to calculate division between two images](https://discourse.slicer.org/t/way-to-calculate-division-between-two-images/11576)

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**Author:** [@GMA](https://discourse.slicer.org/u/GMA)\
**Replies:** 2\
**Last updated:** [May 16, 2020, 6:11pm UTC](https://discourse.slicer.org/t/way-to-calculate-division-between-two-images/11576 "2020-05-16T18:11:17Z")

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it is possible in Slicer to calculate a division between two images? what is the best way? I’d like to divide two parametric maps one by another

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## [Separate arterial phase and venous phase into two series](https://discourse.slicer.org/t/separate-arterial-phase-and-venous-phase-into-two-series/5262)

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**Author:** [@Chen\_Bangbin](https://discourse.slicer.org/u/Chen_Bangbin)\
**Replies:** 14\
**Last updated:** [May 16, 2020, 3:25pm UTC](https://discourse.slicer.org/t/separate-arterial-phase-and-venous-phase-into-two-series/5262 "2020-05-16T15:25:03Z")

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Operating system: macbook pro Slicer version: 4.11.0 Expected behavior: Actual behavior: Dear sir: When I upload abdominal CT images, the arterial phase and venous phase images are mixed up. How can I separate them …

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## [Is there a way to match two views for different thickness data?](https://discourse.slicer.org/t/is-there-a-way-to-match-two-views-for-different-thickness-data/11575)

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**Author:** [@RayCui](https://discourse.slicer.org/u/RayCui)\
**Replies:** 1\
**Last updated:** [May 16, 2020, 2:46pm UTC](https://discourse.slicer.org/t/is-there-a-way-to-match-two-views-for-different-thickness-data/11575 "2020-05-16T14:46:56Z")

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I get two different timepoints data of a patient, and the two data’s thickness is different. Is there a way to specify the matching relationship between layers? When I scroll one view, another view scrolls together foll…

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## [3D vascular US loading](https://discourse.slicer.org/t/3d-vascular-us-loading/11571)

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**Author:** [@Rodrigo\_Visconti](https://discourse.slicer.org/u/Rodrigo_Visconti)\
**Replies:** 1\
**Last updated:** [May 16, 2020, 4:19am UTC](https://discourse.slicer.org/t/3d-vascular-us-loading/11571 "2020-05-16T04:19:34Z")

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There is any way to load 3D vascular US (I can’t export in cartesian Dicom) in slicer? Please give me a clue

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## [Using MRI open datasets from Standford](https://discourse.slicer.org/t/using-mri-open-datasets-from-standford/11543)

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**Author:** [@PameZurita](https://discourse.slicer.org/u/PameZurita)\
**Replies:** 1\
**Last updated:** [May 15, 2020, 4:35pm UTC](https://discourse.slicer.org/t/using-mri-open-datasets-from-standford/11543 "2020-05-15T16:35:27Z")

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I’m new using 3D Slicer. I’m currently working with MRI in order to segment it and create a socket. I’m working with datasets from Standford (mridata.org) wich has all their MRI in H5 format. When I upload them, it fail…

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## [Uploading DICOM files](https://discourse.slicer.org/t/uploading-dicom-files/11550)

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**Author:** [@Bassam](https://discourse.slicer.org/u/Bassam)\
**Replies:** 2\
**Last updated:** [May 15, 2020, 6:18am UTC](https://discourse.slicer.org/t/uploading-dicom-files/11550 "2020-05-15T06:18:07Z")

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Hi, Kindly, how can I display the whole view for DICOM images which were been taken in an oblique position ? I have an images for the pancreas which were acquired in an oblique slices, and after I uploaded these images…

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## [Cannot execute binary file](https://discourse.slicer.org/t/cannot-execute-binary-file/11540)

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**Author:** [@gelfoam](https://discourse.slicer.org/u/gelfoam)\
**Replies:** 2\
**Last updated:** [May 15, 2020, 3:44am UTC](https://discourse.slicer.org/t/cannot-execute-binary-file/11540 "2020-05-15T03:44:25Z")

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Hi all, I have installed my 3DSlicer on Linux system but appeared the following message. Please tell me what went wrong? Operating system:Ubuntu 16.04 Slicer version:Slicer-4.10.2-linux-amd64 Many thanks

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## [3D reconstruction from 2D slices](https://discourse.slicer.org/t/3d-reconstruction-from-2d-slices/9784)

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**Author:** [@Deepa](https://discourse.slicer.org/u/Deepa)\
**Replies:** 10\
**Last updated:** [May 15, 2020, 3:17am UTC](https://discourse.slicer.org/t/3d-reconstruction-from-2d-slices/9784 "2020-05-15T03:17:27Z")

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I’m trying to reconstruct a 3D volume from the 2D images provided in this study (image source). Post reconstruction, I’d like to filter only blood vessels that range from 1-10 micrometers. I hope the lat part can be don…

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## [Extension manager index update timeline](https://discourse.slicer.org/t/extension-manager-index-update-timeline/11528)

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**Author:** [@evan](https://discourse.slicer.org/u/evan)\
**Replies:** 3\
**Last updated:** [May 14, 2020, 9:28pm UTC](https://discourse.slicer.org/t/extension-manager-index-update-timeline/11528 "2020-05-14T21:28:39Z")

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After submitting an extension to the Slicer Extension Index via pull request and having that pull request accepted and merged, what is the procedure or general timeframe until that extension will be publicly available on…

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## [How to inform the pixel resolution in Volume module?](https://discourse.slicer.org/t/how-to-inform-the-pixel-resolution-in-volume-module/11515)

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**Author:** [@Acantharia](https://discourse.slicer.org/u/Acantharia)\
**Replies:** 5\
**Last updated:** [May 14, 2020, 7:21pm UTC](https://discourse.slicer.org/t/how-to-inform-the-pixel-resolution-in-volume-module/11515 "2020-05-14T19:21:56Z")

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Dear all, I have a stack of TIFF images with a pixel resolution of 8nmx8nmx8nm. In order to calculate the volume of different segments in nm3 (and so making the conversion between voxel numbers and nm3) using segment st…

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## [Interpolation and extrapolation of MRI images](https://discourse.slicer.org/t/interpolation-and-extrapolation-of-mri-images/11534)

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**Author:** [@Jonathan](https://discourse.slicer.org/u/Jonathan)\
**Replies:** 0\
**Last updated:** [May 14, 2020, 8:06am UTC](https://discourse.slicer.org/t/interpolation-and-extrapolation-of-mri-images/11534 "2020-05-14T08:06:48Z")

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Hi, I am trying to reconstruct a heart model from MRI scans. I used the Segmentation Editor to create a 3d model and managed to get the following result: Which feature can I use to fill the holes of the outer layer?…

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## [Calculate angle between two planes](https://discourse.slicer.org/t/calculate-angle-between-two-planes/11497)

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**Author:** [@syh91006](https://discourse.slicer.org/u/syh91006)\
**Replies:** 4\
**Last updated:** [May 14, 2020, 1:47am UTC](https://discourse.slicer.org/t/calculate-angle-between-two-planes/11497 "2020-05-14T01:47:44Z")

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Operating system: windows 10 Slicer version: version 4.11.0 revision 29053 built 2020-05-11 Expected behavior: calculate angle between two planes Actual behavior: After I used extensions manager installing “AnglePl…

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## [Best approach to remove (melt down) a tooth](https://discourse.slicer.org/t/best-approach-to-remove-melt-down-a-tooth/11523)

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**Author:** [@flaviu2](https://discourse.slicer.org/u/flaviu2)\
**Replies:** 0\
**Last updated:** [May 13, 2020, 3:37pm UTC](https://discourse.slicer.org/t/best-approach-to-remove-melt-down-a-tooth/11523 "2020-05-13T15:37:48Z")

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Hello. What is a good approach to remove a tooth from a teeth from a CBCT ? I have read these docs: Documentation/Nightly/Training - Slicer Wiki in order to see a growing from seeds approach, and I have tried this tech…

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## [3D Slicer and Nvidia AIAA](https://discourse.slicer.org/t/3d-slicer-and-nvidia-aiaa/11518)

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**Author:** [@Ricardo](https://discourse.slicer.org/u/Ricardo)\
**Replies:** 3\
**Last updated:** [May 13, 2020, 3:20pm UTC](https://discourse.slicer.org/t/3d-slicer-and-nvidia-aiaa/11518 "2020-05-13T15:20:57Z")

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Hi all. I’m really interested in trying the Nvidia extension in title. Is it possible to know if a GPU like this https://www.nvidia.com/content/dam/en-zz/Solutions/design-visualization/documents/75509\_DS\_NV\_Quadro\_K2200…

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## [2D views not synchronized from 3D view with shift+mouse](https://discourse.slicer.org/t/2d-views-not-synchronized-from-3d-view-with-shift-mouse/11516)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 0\
**Last updated:** [May 13, 2020, 9:29am UTC](https://discourse.slicer.org/t/2d-views-not-synchronized-from-3d-view-with-shift-mouse/11516 "2020-05-13T09:29:34Z")

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Since 4.11.0-2020-05-06 r29052 / 865dd83, the 2D views are not synchronized with shift+mouse on a VolumeRendering 3D view. This was OK with 4.11.0-2020-04-30 r29028 / 1956d89. The 2D views do get synchronized with shift…

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## [Merge segments from different Hierarchy model](https://discourse.slicer.org/t/merge-segments-from-different-hierarchy-model/11477)

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**Author:** [@Acantharia](https://discourse.slicer.org/u/Acantharia)\
**Replies:** 2\
**Last updated:** [May 13, 2020, 8:54am UTC](https://discourse.slicer.org/t/merge-segments-from-different-hierarchy-model/11477 "2020-05-13T08:54:52Z")

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Dear all, I am wondering how to merge segments of different model hierarchy. I did not pay attention at the beginning but I created different “segments” from the same object I want to segment. In other words, the same ob…

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## [What determines DICOM import "Image Type" ordering?](https://discourse.slicer.org/t/what-determines-dicom-import-image-type-ordering/11508)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 4\
**Last updated:** [May 13, 2020, 5:46am UTC](https://discourse.slicer.org/t/what-determines-dicom-import-image-type-ordering/11508 "2020-05-13T05:46:29Z")

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Hello, I am importing DICOM Dixon images and am getting inconsistent ordering of the image types. Slicer correctly identifies that there are 4 image types, but does not order them in a consistent way. Other software (e…

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## [Is it possible to use margin tool only inside a ROI?](https://discourse.slicer.org/t/is-it-possible-to-use-margin-tool-only-inside-a-roi/11512)

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**Author:** [@Mohammad\_Tanjib\_Rahm](https://discourse.slicer.org/u/Mohammad_Tanjib_Rahm)\
**Replies:** 3\
**Last updated:** [May 13, 2020, 2:59am UTC](https://discourse.slicer.org/t/is-it-possible-to-use-margin-tool-only-inside-a-roi/11512 "2020-05-13T02:59:20Z")

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Hi, I am trying to shrink the margin of the segmentation by couple millimetres. However I want to do it only inside the specified annotation ROI. I tried setting the source geometry as the annotation ROI and then using …

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## [Misalignment between Nifti image and mask](https://discourse.slicer.org/t/misalignment-between-nifti-image-and-mask/11507)

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**Author:** [@Bassam](https://discourse.slicer.org/u/Bassam)\
**Replies:** 2\
**Last updated:** [May 12, 2020, 11:11pm UTC](https://discourse.slicer.org/t/misalignment-between-nifti-image-and-mask/11507 "2020-05-12T23:11:36Z")

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## [Tracking tumors growth/ shrinkage in Slicer 3D](https://discourse.slicer.org/t/tracking-tumors-growth-shrinkage-in-slicer-3d/11312)

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**Author:** [@emipaw](https://discourse.slicer.org/u/emipaw)\
**Replies:** 2\
**Last updated:** [May 12, 2020, 8:41pm UTC](https://discourse.slicer.org/t/tracking-tumors-growth-shrinkage-in-slicer-3d/11312 "2020-05-12T20:41:45Z")

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Hi, I want to compare liver tumors growth and shrinkage - I read that there is a special extension for this purpose - ChangeTracker, but I also read that it is dedicated specifically for meningioma growth analysis. And …

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