# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=161

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

**Page:** 162

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## [LungCTAnalyzer error: NoneType oject has no attribute](https://discourse.slicer.org/t/lungctanalyzer-error-nonetype-oject-has-no-attribute/29616)

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**Author:** [@Victor\_Shahen](https://discourse.slicer.org/u/Victor_Shahen)\
**Replies:** 1\
**Last updated:** [May 24, 2023, 2:43pm UTC](https://discourse.slicer.org/t/lungctanalyzer-error-nonetype-oject-has-no-attribute/29616 "2023-05-24T14:43:57Z")

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Hi, I am using the Lung CT Segmenter add-on module and have had problems running it with imported CT data. Apologies, as I have never used the program before so please bear with me. I am struggling to get the module to …

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## [Launch multiple instances of Slicer in Mac](https://discourse.slicer.org/t/launch-multiple-instances-of-slicer-in-mac/29630)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 4\
**Last updated:** [May 24, 2023, 1:51pm UTC](https://discourse.slicer.org/t/launch-multiple-instances-of-slicer-in-mac/29630 "2023-05-24T13:51:29Z")

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Is there a way to launch multiple Slicer application in Mac? I can do that in windows and linux just fine by clicking the icon, but in mac that simply changes the focus to main Slicer window. CMD, option or other key com…

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## [3D Slicer 5.2.2 not responding for 2 hours](https://discourse.slicer.org/t/3d-slicer-5-2-2-not-responding-for-2-hours/29613)

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**Author:** [@TiniNant](https://discourse.slicer.org/u/TiniNant)\
**Replies:** 8\
**Last updated:** [May 24, 2023, 1:49pm UTC](https://discourse.slicer.org/t/3d-slicer-5-2-2-not-responding-for-2-hours/29613 "2023-05-24T13:49:51Z")

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Has anyone encountered the same problem or could find a solution to fix the following problem: 3D slicer does not respond after 5 to 6 minutes of running. Then after 1 hour, it responds for 4 seconds and then doesn’t re…

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## [Prevent slicer overwritting nrrd header.](https://discourse.slicer.org/t/prevent-slicer-overwritting-nrrd-header/29601)

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**Author:** [@mmonteiro](https://discourse.slicer.org/u/mmonteiro)\
**Replies:** 6\
**Last updated:** [May 24, 2023, 8:37am UTC](https://discourse.slicer.org/t/prevent-slicer-overwritting-nrrd-header/29601 "2023-05-24T08:37:04Z")

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Hello, I am trying to store some custom metadata in the nrrd header of my segmentation files. For example, the id of the annotator which segmented the file. The intended workflow is to: Load a nrrd segmentation file w…

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## [Is there a Lasso tool in the Segment Editor module in Slicer?](https://discourse.slicer.org/t/is-there-a-lasso-tool-in-the-segment-editor-module-in-slicer/29383)

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**Author:** [@Russell\_Engelman](https://discourse.slicer.org/u/Russell_Engelman)\
**Replies:** 4\
**Last updated:** [May 23, 2023, 7:40pm UTC](https://discourse.slicer.org/t/is-there-a-lasso-tool-in-the-segment-editor-module-in-slicer/29383 "2023-05-23T19:40:50Z")

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I am currently segmenting a number of fossil and extant mammal specimens where I have to manually separate key ROIs from a threshholded volume due to insufficient differences in density between elements (example: separat…

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## [Difference between DeepEdit and Segmentation Model in Monai ](https://discourse.slicer.org/t/difference-between-deepedit-and-segmentation-model-in-monai/29606)

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**Author:** [@Arpan\_Gyawali](https://discourse.slicer.org/u/Arpan_Gyawali)\
**Replies:** 0\
**Last updated:** [May 23, 2023, 1:56pm UTC](https://discourse.slicer.org/t/difference-between-deepedit-and-segmentation-model-in-monai/29606 "2023-05-23T13:56:05Z")

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I have to do the segmentation of the brain from the CTA data. I choose MONAI Label for that, and I am using the Monai extension in the 3D slicer. I have gone through all the lecture videos on YouTube as well as the docum…

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## [Registration of FLAIR MRI with segmented glioma with anatomical atlas ](https://discourse.slicer.org/t/registration-of-flair-mri-with-segmented-glioma-with-anatomical-atlas/29605)

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**Author:** [@TomC](https://discourse.slicer.org/u/TomC)\
**Replies:** 0\
**Last updated:** [May 23, 2023, 1:55pm UTC](https://discourse.slicer.org/t/registration-of-flair-mri-with-segmented-glioma-with-anatomical-atlas/29605 "2023-05-23T13:55:50Z")

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Hello, I am fairly new to 3d slicer. My aim is to determine the position and infiltration of a glioma with the insular cortex. I have segmented the tumour. I am unsure where to go from here. Would I need to register wit…

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## [Apply Resample and/or Crop to transformed volume](https://discourse.slicer.org/t/apply-resample-and-or-crop-to-transformed-volume/29594)

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**Author:** [@bserrano](https://discourse.slicer.org/u/bserrano)\
**Replies:** 1\
**Last updated:** [May 23, 2023, 1:36pm UTC](https://discourse.slicer.org/t/apply-resample-and-or-crop-to-transformed-volume/29594 "2023-05-23T13:36:04Z")

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Hi all, We want to reduce the spacial spacing between slices by applying Resample Scalar Volume or Crop Volume modules. When importing the volume this message appears. After loading the volume, the application of the…

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## [Can't open s certain dicom file](https://discourse.slicer.org/t/cant-open-s-certain-dicom-file/29541)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 9\
**Last updated:** [May 23, 2023, 11:10am UTC](https://discourse.slicer.org/t/cant-open-s-certain-dicom-file/29541 "2023-05-23T11:10:40Z")

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this is the second time it occurred , a dicom file get uploaded yet couldn’t open it . tried reload it again and again and just cant open notice this error this time whenever opening slicer as well b’E: cannot create n…

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## [Ubuntu20.04, start Slicer, have X11 error](https://discourse.slicer.org/t/ubuntu20-04-start-slicer-have-x11-error/29593)

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**Author:** [@Liang\_Ma](https://discourse.slicer.org/u/Liang_Ma)\
**Replies:** 1\
**Last updated:** [May 23, 2023, 7:33am UTC](https://discourse.slicer.org/t/ubuntu20-04-start-slicer-have-x11-error/29593 "2023-05-23T07:33:35Z")

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Hello, I download the recent release, run Slicer application, and meet such an error ( a GUI display shortly and crashed) $ ./Slicer The X11 connection broke: No error (code 0) X connection to :1 broken (explicit kill…

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## [Terminologies questions](https://discourse.slicer.org/t/terminologies-questions/27384)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 37\
**Last updated:** [May 23, 2023, 3:30am UTC](https://discourse.slicer.org/t/terminologies-questions/27384 "2023-05-23T03:30:32Z")

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As part of our training, we want to encourage the use of terminology feature of Slicer to name segments. This will provide better data reuse for downstream tasks. As I am getting more familiar myself, I noticed a few iss…

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## [Skeletal Representation Spoke Length](https://discourse.slicer.org/t/skeletal-representation-spoke-length/29589)

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**Author:** [@umair04](https://discourse.slicer.org/u/umair04)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 7:53pm UTC](https://discourse.slicer.org/t/skeletal-representation-spoke-length/29589 "2023-05-22T19:53:51Z")

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Is there a way I can measure the length of the spokes once I have created a skeletal representation using SlicerSALT?

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## [Reloading Training Models in MONAI Label](https://discourse.slicer.org/t/reloading-training-models-in-monai-label/29588)

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**Author:** [@Daniel\_Pardi](https://discourse.slicer.org/u/Daniel_Pardi)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 4:47pm UTC](https://discourse.slicer.org/t/reloading-training-models-in-monai-label/29588 "2023-05-22T16:47:35Z")

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Hello, I am relatively new to using 3D Slicer and MONAI Label. I am currently learning how to do training on the deep edit model from scratch with data of my own. I have a couple of questions that I’m hoping could be an…

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## [Can you use grow from seeds with just one segmentation? ](https://discourse.slicer.org/t/can-you-use-grow-from-seeds-with-just-one-segmentation/29587)

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**Author:** [@JosieQuick77](https://discourse.slicer.org/u/JosieQuick77)\
**Replies:** 1\
**Last updated:** [May 22, 2023, 3:41pm UTC](https://discourse.slicer.org/t/can-you-use-grow-from-seeds-with-just-one-segmentation/29587 "2023-05-22T15:41:48Z")

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I’m new to Slicer and I’m trying to use the grow from seeds function. Can I use it for just the aorta, or do I have to be making multiple segmentations?

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## [Checking the distance bwtween two STL models in order to exaluate the accuracy between virtual planning and actual surgery](https://discourse.slicer.org/t/checking-the-distance-bwtween-two-stl-models-in-order-to-exaluate-the-accuracy-between-virtual-planning-and-actual-surgery/29584)

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**Author:** [@wael\_telha](https://discourse.slicer.org/u/wael_telha)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 2:44pm UTC](https://discourse.slicer.org/t/checking-the-distance-bwtween-two-stl-models-in-order-to-exaluate-the-accuracy-between-virtual-planning-and-actual-surgery/29584 "2023-05-22T14:44:47Z")

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hi dear all , I would like to confirm the accuracy of my evaluation through sharing with you some of the steps I used for the measurement of accuracy between the virtual planning model and the actual post-operative mode…

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## [Morita .vol file import](https://discourse.slicer.org/t/morita-vol-file-import/29544)

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**Author:** [@Tijl](https://discourse.slicer.org/u/Tijl)\
**Replies:** 1\
**Last updated:** [May 22, 2023, 9:20am UTC](https://discourse.slicer.org/t/morita-vol-file-import/29544 "2023-05-22T09:20:30Z")

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I have a .vol file from a cbct volume from a morita cbct machine This is the header from the file I dont know how to proceed or what to do to import. JmVolumeVersion=1Ú \<?xml version='1.0' encoding='Shift\_JIS' ?\>…

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## [Surface Dice similarity coefficient](https://discourse.slicer.org/t/surface-dice-similarity-coefficient/29514)

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**Author:** [@Rukhsora](https://discourse.slicer.org/u/Rukhsora)\
**Replies:** 1\
**Last updated:** [May 22, 2023, 8:59am UTC](https://discourse.slicer.org/t/surface-dice-similarity-coefficient/29514 "2023-05-22T08:59:05Z")

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How can I obtain Surface Dice Coefficient in 3D Slicer 5.3.0. ?

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## [ABL Temporal Bone Segmentation Module](https://discourse.slicer.org/t/abl-temporal-bone-segmentation-module/16494)

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**Author:** [@DAT\_Minh](https://discourse.slicer.org/u/DAT_Minh)\
**Replies:** 12\
**Last updated:** [May 22, 2023, 6:39am UTC](https://discourse.slicer.org/t/abl-temporal-bone-segmentation-module/16494 "2023-05-22T06:39:36Z")

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Dear Andras @lassoan . I posted this topic 1 month ago. I’m segmenting temporal bone using ABL Temporal Bone Segmentation. I stuck at step 2: Rigid registration because the my data and atlas is too far off (Too many sam…

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## [Problem in segmenting small hand bones](https://discourse.slicer.org/t/problem-in-segmenting-small-hand-bones/29566)

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**Author:** [@TewoSpring](https://discourse.slicer.org/u/TewoSpring)\
**Replies:** 1\
**Last updated:** [May 21, 2023, 5:43pm UTC](https://discourse.slicer.org/t/problem-in-segmenting-small-hand-bones/29566 "2023-05-21T17:43:15Z")

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Hi! I am new here; also thak you for the support and the developement of Slicer: I am really enjoying it! So my problem is with the segmentation of the scaphoid in the RMI. It seems that, even if I am using the 1% size…

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## [issue with exporting seg Dicom files ](https://discourse.slicer.org/t/issue-with-exporting-seg-dicom-files/29556)

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**Author:** [@mustafa\_magdy](https://discourse.slicer.org/u/mustafa_magdy)\
**Replies:** 5\
**Last updated:** [May 21, 2023, 3:33am UTC](https://discourse.slicer.org/t/issue-with-exporting-seg-dicom-files/29556 "2023-05-21T03:33:46Z")

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i downloaded Data from TCIA and its already have a seg results. what i want to do is exporting the segmented lesion out of the whole volume as dicom file to start working on it. what i’m getting after exporting the fil…

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## [Issue with full screen](https://discourse.slicer.org/t/issue-with-full-screen/29550)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 1\
**Last updated:** [May 21, 2023, 12:31am UTC](https://discourse.slicer.org/t/issue-with-full-screen/29550 "2023-05-21T00:31:53Z")

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recently almost all interface functions open in another window whenever slicer is in full-screen view. I’m using 5.3 on Mac OS Venture Version 13.3.1 with Apple M2 Pro

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## [How to easily turn a hollow segmentation into a solid (blood pool) segmentation](https://discourse.slicer.org/t/how-to-easily-turn-a-hollow-segmentation-into-a-solid-blood-pool-segmentation/16017)

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**Author:** [@Jezza](https://discourse.slicer.org/u/Jezza)\
**Replies:** 4\
**Last updated:** [May 20, 2023, 8:03pm UTC](https://discourse.slicer.org/t/how-to-easily-turn-a-hollow-segmentation-into-a-solid-blood-pool-segmentation/16017 "2023-05-20T20:03:22Z")

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Operating system: macOS Catalina 10.15.7 Slicer version: 4.11 20200930 Hi, I’m aware that it is possible to turn a hollow segmentation (e.g artery) into a solid (blood pool) version. This is done using the following: …

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## [Creating Histograms From Segments ](https://discourse.slicer.org/t/creating-histograms-from-segments/22297)

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**Author:** [@benwilk](https://discourse.slicer.org/u/benwilk)\
**Replies:** 4\
**Last updated:** [May 20, 2023, 7:51pm UTC](https://discourse.slicer.org/t/creating-histograms-from-segments/22297 "2023-05-20T19:51:49Z")

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I’ve been trying to follow the code found here to create a histogram from my existing MR and existing segmentation. I read on another post that I need to change the volume node and segmentation node so I have the code be…

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## [easyclip 3dslicer](https://discourse.slicer.org/t/easyclip-3dslicer/29557)

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**Author:** [@mjspink](https://discourse.slicer.org/u/mjspink)\
**Replies:** 0\
**Last updated:** [May 20, 2023, 5:53pm UTC](https://discourse.slicer.org/t/easyclip-3dslicer/29557 "2023-05-20T17:53:38Z")

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I’ve add the extension Easyclip. I am familiar with its intent. However, once I click “clipping” nothing occurs - my clipped anatomy is not isolated. Is this a new problem?

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## [Enhancing rendered volume](https://discourse.slicer.org/t/enhancing-rendered-volume/29487)

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**Author:** [@KSL](https://discourse.slicer.org/u/KSL)\
**Replies:** 6\
**Last updated:** [May 19, 2023, 10:41am UTC](https://discourse.slicer.org/t/enhancing-rendered-volume/29487 "2023-05-19T10:41:24Z")

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Hello friends, I came across a video on Youtube by Amira Software that rendered the spine with fine details of the vertebrae (labelleb 1, in the image). When I try to obtain the fine details (labelled 2, in the image) us…

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## [Unable to view rt struct even after installing slicerRT extension](https://discourse.slicer.org/t/unable-to-view-rt-struct-even-after-installing-slicerrt-extension/29527)

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**Author:** [@Anonymous007](https://discourse.slicer.org/u/Anonymous007)\
**Replies:** 1\
**Last updated:** [May 18, 2023, 7:07pm UTC](https://discourse.slicer.org/t/unable-to-view-rt-struct-even-after-installing-slicerrt-extension/29527 "2023-05-18T19:07:49Z")

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I was trying to install slicerRT extension using extension manager. But it was giving this error. Then I installed the extension manually from a file https://slicer-packages.kitware.com/api/v1/item/62c80d5caa08d161a3…

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## [Python Script - Export DICOM Tag issue](https://discourse.slicer.org/t/python-script-export-dicom-tag-issue/29507)

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**Author:** [@Markb](https://discourse.slicer.org/u/Markb)\
**Replies:** 3\
**Last updated:** [May 18, 2023, 1:22pm UTC](https://discourse.slicer.org/t/python-script-export-dicom-tag-issue/29507 "2023-05-18T13:22:38Z")

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Hi all. I have a python script to automate making a bunch of masked data based on a PET and RTStruct file. As there are quite a few segments per study, and I have hundreds of studies, I want to automate this as much as p…

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## [How can I get markup's 2D position in 3D view](https://discourse.slicer.org/t/how-can-i-get-markups-2d-position-in-3d-view/29521)

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**Author:** [@nnzzll](https://discourse.slicer.org/u/nnzzll)\
**Replies:** 1\
**Last updated:** [May 18, 2023, 4:00am UTC](https://discourse.slicer.org/t/how-can-i-get-markups-2d-position-in-3d-view/29521 "2023-05-18T04:00:20Z")

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Is there a way to calculate the markup’s position in the 3D view? I mean the 2D position when capturing the 3D view into a 2D image, not the RAS coordinates.

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## [DTI measurements: spherical and linear](https://discourse.slicer.org/t/dti-measurements-spherical-and-linear/29442)

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**Author:** [@mali](https://discourse.slicer.org/u/mali)\
**Replies:** 1\
**Last updated:** [May 17, 2023, 8:33pm UTC](https://discourse.slicer.org/t/dti-measurements-spherical-and-linear/29442 "2023-05-17T20:33:32Z")

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Dear all, after tractography I used my vtk files to extract measurements using Slicer. In the resulting table there are two columns with numbers that I cannot really identify. They are called “spherical” and “linear”. I…

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## [Dicom rt save and load](https://discourse.slicer.org/t/dicom-rt-save-and-load/29391)

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**Author:** [@Dex2046](https://discourse.slicer.org/u/Dex2046)\
**Replies:** 10\
**Last updated:** [May 17, 2023, 6:34pm UTC](https://discourse.slicer.org/t/dicom-rt-save-and-load/29391 "2023-05-17T18:34:55Z")

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I segmented a PET image and exported the segmentation as rtstruct with dicom-rt format. But, when I import the rtstruct, something goes wrong. Where is the problem, thank you for all.

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