**Author:** [@coreg](https://discourse.slicer.org/u/coreg)\
**Replies:** 9\
**Last updated:** [September 16, 2021, 12:51pm UTC](https://discourse.slicer.org/t/large-ct-images/19634 "2021-09-16T12:51:52Z")
Hello, I am working with large CT images of an entire human body. Dicom convertion is done with Dicom to Nifti converter from C.Rorden. Voxel spacing is typically 0.9x0.9x0.6 and the dims ranging rnd 512x512x2000. Th…
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## [Failed to use Nvidia Annotation](https://discourse.slicer.org/t/failed-to-use-nvidia-annotation/19694)
**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 3\
**Last updated:** [September 16, 2021, 12:35pm UTC](https://discourse.slicer.org/t/failed-to-use-nvidia-annotation/19694 "2021-09-16T12:35:13Z")
hi everyone, anyone know how to solve this problem Failed to fetch models from remote server. Make sure server address is correct and \/v1/models is accessible in browser
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## [Livewire tool in 3D slicer](https://discourse.slicer.org/t/livewire-tool-in-3d-slicer/19690)
**Author:** [@alyssan](https://discourse.slicer.org/u/alyssan)\
**Replies:** 2\
**Last updated:** [September 16, 2021, 3:07am UTC](https://discourse.slicer.org/t/livewire-tool-in-3d-slicer/19690 "2021-09-16T03:07:20Z")
Is their something similar to say a livewire tool in 3D slicer where I can draw out where I want to segment?
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## [Why my 3D-printed model doesn't match the real size?](https://discourse.slicer.org/t/why-my-3d-printed-model-doesnt-match-the-real-size/19688)
**Author:** [@arezoo.movahed](https://discourse.slicer.org/u/arezoo.movahed)\
**Replies:** 1\
**Last updated:** [September 15, 2021, 6:27pm UTC](https://discourse.slicer.org/t/why-my-3d-printed-model-doesnt-match-the-real-size/19688 "2021-09-15T18:27:55Z")
Hello, I remodel a human heart, actually I used my Mom’s CT Angiography data, and after segmentation, I exported a stl file and 3D-Print it. But the model is so big and doesn’t match the real size. I was wondering wha…
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## [How to build NVIDIA extension using CMake](https://discourse.slicer.org/t/how-to-build-nvidia-extension-using-cmake/19681)
**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 3\
**Last updated:** [September 15, 2021, 4:56pm UTC](https://discourse.slicer.org/t/how-to-build-nvidia-extension-using-cmake/19681 "2021-09-15T16:56:19Z")
Hi all, I have followed this instruction to plug in NVIDIA. But, how to build it in CMake. (attached picture is my C Make) this step I did not get the last step. This one: To build extension package, build 3D Slicer t…
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## [Nvidia for liver segmentation using segment from the boundary point](https://discourse.slicer.org/t/nvidia-for-liver-segmentation-using-segment-from-the-boundary-point/19596)
**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 6\
**Last updated:** [September 15, 2021, 4:45pm UTC](https://discourse.slicer.org/t/nvidia-for-liver-segmentation-using-segment-from-the-boundary-point/19596 "2021-09-15T16:45:50Z")
Hello, before this, I used Nvidia for liver segmentation using segments from the boundary point. but this time there not have. Why?
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## [Is the extensions server down?](https://discourse.slicer.org/t/is-the-extensions-server-down/19687)
**Author:** [@jpeoples](https://discourse.slicer.org/u/jpeoples)\
**Replies:** 1\
**Last updated:** [September 15, 2021, 4:43pm UTC](https://discourse.slicer.org/t/is-the-extensions-server-down/19687 "2021-09-15T16:43:46Z")
Operating system: Windows 10 Slicer version: 4.11.0-2020-07-18 r29221 / 26fbefd Expected behavior: View and download extensions in Extension Manager Actual behavior: No extensions are showing up: According to the …
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## [can not install Looking glass extension](https://discourse.slicer.org/t/can-not-install-looking-glass-extension/19665)
**Author:** [@Donald\_Holm](https://discourse.slicer.org/u/Donald_Holm)\
**Replies:** 8\
**Last updated:** [September 15, 2021, 4:35pm UTC](https://discourse.slicer.org/t/can-not-install-looking-glass-extension/19665 "2021-09-15T16:35:25Z")
I use Windows 10 with My Looking Glass. I’m following the install and use video. I’m at the point where I do a search for the Looking Glass extension but it does not show up. The page states it has 87. I look down I’…
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## [Assign multiple segment to specific area / ROI](https://discourse.slicer.org/t/assign-multiple-segment-to-specific-area-roi/19623)
**Author:** [@shubham\_agrawal](https://discourse.slicer.org/u/shubham_agrawal)\
**Replies:** 3\
**Last updated:** [September 15, 2021, 1:33pm UTC](https://discourse.slicer.org/t/assign-multiple-segment-to-specific-area-roi/19623 "2021-09-15T13:33:20Z")
Hi, I wanted to mark a specific area / ROI and assign multiple segments to it, I even thought of using logical operator but it copies complete segment. Kindly suggest some methods.
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## [PET and CT fusion](https://discourse.slicer.org/t/pet-and-ct-fusion/13843)
**Author:** [@aseman](https://discourse.slicer.org/u/aseman)\
**Replies:** 1\
**Last updated:** [September 15, 2021, 1:25am UTC](https://discourse.slicer.org/t/pet-and-ct-fusion/13843 "2021-09-15T01:25:16Z")
Slicer version: 4.10.1 Hi 3D Slicer experts and all I have 2 images, CT and PET. I want to fuse two images together. Which module can I use to do this? can you help me? Thanks a lot
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## [Surface Toolbox bug](https://discourse.slicer.org/t/surface-toolbox-bug/19679)
**Author:** [@smrolfe](https://discourse.slicer.org/u/smrolfe)\
**Replies:** 1\
**Last updated:** [September 15, 2021, 1:12am UTC](https://discourse.slicer.org/t/surface-toolbox-bug/19679 "2021-09-15T01:12:28Z")
The decimate tool in the Surface Toolbox produces the same output with or without the “Boundary deletion” checkbox selected. On debugging, it looks like there’s a typo in the parameter name here: Which should be consi…
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## [Monai/monailabel training from scratch](https://discourse.slicer.org/t/monai-monailabel-training-from-scratch/19676)
**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 1\
**Last updated:** [September 15, 2021, 12:28am UTC](https://discourse.slicer.org/t/monai-monailabel-training-from-scratch/19676 "2021-09-15T00:28:00Z")
We would like to try Monai/MonaiLabel to segment mouse fetuses which are scanned via contrast-enhanced microCT . I don’t think any of the existing models will be relevant for us. How does one go developing a model from s…
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## [Change Color of Segmentation by Script](https://discourse.slicer.org/t/change-color-of-segmentation-by-script/3170)
**Author:** [@trnhx001](https://discourse.slicer.org/u/trnhx001)\
**Replies:** 5\
**Last updated:** [September 14, 2021, 9:29pm UTC](https://discourse.slicer.org/t/change-color-of-segmentation-by-script/3170 "2021-09-14T21:29:57Z")
Operating system: Window 7 Slicer version: 4.8.1 Hi, I am trying to write a program to load two segmentation of Carotid done by two different people on the same volume, then I want to save images of all slices from ax…
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## [Resampling and inflation](https://discourse.slicer.org/t/resampling-and-inflation/15635)
**Author:** [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Replies:** 1\
**Last updated:** [September 14, 2021, 9:19pm UTC](https://discourse.slicer.org/t/resampling-and-inflation/15635 "2021-09-14T21:19:56Z")
Slicer version: 4.11.20200930 Hello all, I have a target area of interest (thalamus) that has been segmented at a higher resolution (and smaller FOV) than the T1 scan. As part of my workflow in Slicer, I resampled the…
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## [How to change contrast](https://discourse.slicer.org/t/how-to-change-contrast/19673)
**Author:** [@alyssan](https://discourse.slicer.org/u/alyssan)\
**Replies:** 1\
**Last updated:** [September 14, 2021, 7:57pm UTC](https://discourse.slicer.org/t/how-to-change-contrast/19673 "2021-09-14T19:57:22Z")
Hello, How can I change the contrast on my ct images?
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## [Exporting Sequences as Dicoms does not work](https://discourse.slicer.org/t/exporting-sequences-as-dicoms-does-not-work/18935)
**Author:** [@shehab](https://discourse.slicer.org/u/shehab)\
**Replies:** 3\
**Last updated:** [September 14, 2021, 7:46pm UTC](https://discourse.slicer.org/t/exporting-sequences-as-dicoms-does-not-work/18935 "2021-09-14T19:46:44Z")
Operating system: Windows 10 Slicer version: 4.13.0-2021-07-22 Expected behavior: Generation of 768 dicoms after I export the sequence with the VolumeSequence option selected Actual behavior: Either a message statin…
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## [a problem about flash back](https://discourse.slicer.org/t/a-problem-about-flash-back/19670)
**Author:** [@DoctorRen](https://discourse.slicer.org/u/DoctorRen)\
**Replies:** 1\
**Last updated:** [September 14, 2021, 5:04pm UTC](https://discourse.slicer.org/t/a-problem-about-flash-back/19670 "2021-09-14T17:04:55Z")
Operating system: Mac OS Big Sur Slicer version: slicer 4.11 Expected behavior: solution to flash back Actual behavior: I can’t do anything when I import an external data, I click on any option in Slicer like Segement…
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## [Atlas to DICOM convertion](https://discourse.slicer.org/t/atlas-to-dicom-convertion/19664)
**Author:** [@R\_Rodriguez](https://discourse.slicer.org/u/R_Rodriguez)\
**Replies:** 2\
**Last updated:** [September 14, 2021, 1:47pm UTC](https://discourse.slicer.org/t/atlas-to-dicom-convertion/19664 "2021-09-14T13:47:06Z")
Hi all I am trying to convert an atlas (binary 0/1 file, originally nifti format) into DICOM. Using “Create DICOM Series” I obtained completely white slices. Some help? Thank you in advance Operating system: Windows …
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## [Modify other segments:](https://discourse.slicer.org/t/modify-other-segments/19568)
**Author:** [@franbuemi](https://discourse.slicer.org/u/franbuemi)\
**Replies:** 6\
**Last updated:** [September 14, 2021, 7:45am UTC](https://discourse.slicer.org/t/modify-other-segments/19568 "2021-09-14T07:45:05Z")
Hi everyone. I am trying to segment a liver following a tutorial. I cannot prevent to remove other segmentations every time I try to overwrite them…in the new 3d slicer version, in “modify other segments” “none” has been…
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## [Functionality of Automatic Threshold Calculator](https://discourse.slicer.org/t/functionality-of-automatic-threshold-calculator/19652)
**Author:** [@alyssan](https://discourse.slicer.org/u/alyssan)\
**Replies:** 4\
**Last updated:** [September 14, 2021, 5:03am UTC](https://discourse.slicer.org/t/functionality-of-automatic-threshold-calculator/19652 "2021-09-14T05:03:03Z")
Hello, I was looking at this example:Automatic endocranium segmentation from dry bone CT scan · GitHub I am interested in knowing how it computes the bone threshold automatically. I am trying to segment bone. Can this b…
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## [Fiducial to Model Surface Distance](https://discourse.slicer.org/t/fiducial-to-model-surface-distance/9554)
**Author:** [@Juicy](https://discourse.slicer.org/u/Juicy)\
**Replies:** 25\
**Last updated:** [September 14, 2021, 1:30am UTC](https://discourse.slicer.org/t/fiducial-to-model-surface-distance/9554 "2021-09-14T01:30:49Z")
Hi Everyone I am working on a project to quantify how closely a surface model generated from a CT scan matches the true bone geometry. This has been done quite extensively in literature but we have a need to quantify ac…
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## [SlicerVR using Valve Index](https://discourse.slicer.org/t/slicervr-using-valve-index/19613)
**Author:** [@siqueirl](https://discourse.slicer.org/u/siqueirl)\
**Replies:** 8\
**Last updated:** [September 13, 2021, 5:30pm UTC](https://discourse.slicer.org/t/slicervr-using-valve-index/19613 "2021-09-13T17:30:06Z")
Dear all, I have attempted to use the SlicerVR Module, but it appears that the HMD is not being tracked when the “Show scene in Virtual Reality” button is toggled. I have tried making different adjustments to the scene,…
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## [How to replicate landmarks across specimens using PseudoLMGenerator fiducials](https://discourse.slicer.org/t/how-to-replicate-landmarks-across-specimens-using-pseudolmgenerator-fiducials/19580)
**Author:** [@Siobhan\_Summers](https://discourse.slicer.org/u/Siobhan_Summers)\
**Replies:** 2\
**Last updated:** [September 13, 2021, 3:52pm UTC](https://discourse.slicer.org/t/how-to-replicate-landmarks-across-specimens-using-pseudolmgenerator-fiducials/19580 "2021-09-13T15:52:31Z")
Operating system: Windows 10 Home Slicer version: 4.13.0 I’m using PseudoLMGenerator to landmark an asymmetrical bone for a morphometric analysis. Can the landmark data collected be used to compare specimens in a morph…
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## [Change ROI box color? (Python?)](https://discourse.slicer.org/t/change-roi-box-color-python/19647)
**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 2\
**Last updated:** [September 13, 2021, 2:57pm UTC](https://discourse.slicer.org/t/change-roi-box-color-python/19647 "2021-09-13T14:57:35Z")
Hey all, Sometimes I use a white background in the 3D view as it matches color plates being prepared for publications. ROI cubes in the 3D view are drawn with white lines, making the box basically disappear. Is there so…
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## [How to select multiple segments in segmentation editor table view](https://discourse.slicer.org/t/how-to-select-multiple-segments-in-segmentation-editor-table-view/19639)
**Author:** [@upupming](https://discourse.slicer.org/u/upupming)\
**Replies:** 1\
**Last updated:** [September 13, 2021, 2:29pm UTC](https://discourse.slicer.org/t/how-to-select-multiple-segments-in-segmentation-editor-table-view/19639 "2021-09-13T14:29:42Z")
In the table view, we have a context menu item named show only selected items, since it says ‘segments’, I assume we should be able to select multiple segments at once, however, I found I can only select one segment once…
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## [How can I insert a custom spherical object into a DICOM file?](https://discourse.slicer.org/t/how-can-i-insert-a-custom-spherical-object-into-a-dicom-file/19577)
**Author:** [@Maya](https://discourse.slicer.org/u/Maya)\
**Replies:** 15\
**Last updated:** [September 13, 2021, 1:33pm UTC](https://discourse.slicer.org/t/how-can-i-insert-a-custom-spherical-object-into-a-dicom-file/19577 "2021-09-13T13:33:06Z")
Hi there! I was wondering if there is a way to insert a custom spherical object into a DICOM file. I would like to segment CT images along the outer edges of that spherical object. Grateful for any instructions on how to…
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## [Ellalign.vtk and SPHARM.vtk](https://discourse.slicer.org/t/ellalign-vtk-and-spharm-vtk/19637)
**Author:** [@lili-yu22](https://discourse.slicer.org/u/lili-yu22)\
**Replies:** 0\
**Last updated:** [September 13, 2021, 2:42am UTC](https://discourse.slicer.org/t/ellalign-vtk-and-spharm-vtk/19637 "2021-09-13T02:42:55Z")
after using SPHARM，I want use MODEL TO MODEL DISTANCE，but i am wondering which file I should use，the spharm ellalign.vtk or SPHARM. vtk? what’s the difference? thanks to help me
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## [How to handle CT intensity / contrast differences](https://discourse.slicer.org/t/how-to-handle-ct-intensity-contrast-differences/19604)
**Author:** [@rbumm](https://discourse.slicer.org/u/rbumm)\
**Replies:** 10\
**Last updated:** [September 12, 2021, 7:38pm UTC](https://discourse.slicer.org/t/how-to-handle-ct-intensity-contrast-differences/19604 "2021-09-12T19:38:51Z")
In the COVID-19 open-source dataset of @PaoloZaffino some CTs have a large variation in terms of brightness, intensity, and contrast. Up: weak contrast Lower: better contrast I need to do extensive window leveling …
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## [Surface Intersection](https://discourse.slicer.org/t/surface-intersection/19630)
**Author:** [@Fluvio\_Lobo](https://discourse.slicer.org/u/Fluvio_Lobo)\
**Replies:** 5\
**Last updated:** [September 12, 2021, 7:25pm UTC](https://discourse.slicer.org/t/surface-intersection/19630 "2021-09-12T19:25:21Z")
Hello, I am trying to calculate the intersection of two surface models to design an orthognathic splint. The intersection will be used as a flag for the mandible to stop rotating and set the occlusion. I found this…
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## [Modify stl object](https://discourse.slicer.org/t/modify-stl-object/19618)
**Author:** [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Replies:** 4\
**Last updated:** [September 10, 2021, 9:47pm UTC](https://discourse.slicer.org/t/modify-stl-object/19618 "2021-09-10T21:47:38Z")
Hello, I am using Slicer version 4.11.20200930 on Ubuntu 20.04 OS. I have imported electrode leads as STL objects from a Matlab-based toolbox and noticed that the black/white colour coding for contacts and inter-contac…
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