# \#sequences

**URL:** https://discourse.slicer.org/tag/sequences/29.md

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

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## [Segmentation of 4D sequence volumes using Sequence Registration](https://discourse.slicer.org/t/segmentation-of-4d-sequence-volumes-using-sequence-registration/20567)

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**Author:** [@Shambhavi\_Malik](https://discourse.slicer.org/u/Shambhavi_Malik)\
**Replies:** 5\
**Last updated:** [November 10, 2025, 3:35pm UTC](https://discourse.slicer.org/t/segmentation-of-4d-sequence-volumes-using-sequence-registration/20567 "2025-11-10T15:35:37Z")

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I am trying to segment the CT Cardio Volume Sequence (from the Slicer sample data). I have followed all the steps as mentioned in Load multiple cardiac phases for segmentation/virtual reality question that was posted ear…

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## [Multivolume Explorer gives error in 5.4 version,  so does module "sequences" allows to plot time intensity charts from multivolume datasets? ](https://discourse.slicer.org/t/multivolume-explorer-gives-error-in-5-4-version-so-does-module-sequences-allows-to-plot-time-intensity-charts-from-multivolume-datasets/31834)

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**Author:** [@Jakub.Otahal](https://discourse.slicer.org/u/Jakub.Otahal)\
**Replies:** 4\
**Last updated:** [June 10, 2025, 3:50pm UTC](https://discourse.slicer.org/t/multivolume-explorer-gives-error-in-5-4-version-so-does-module-sequences-allows-to-plot-time-intensity-charts-from-multivolume-datasets/31834 "2025-06-10T15:50:40Z")

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Hello everybody, I have used for long time Multivolume Importer and Explorer to view and analyse DCE datasets in Slicer 4.11. Today when I come back to that with new 5.4 version of Slicer I realized that the Multivolume…

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## [4DCT dicom import and save](https://discourse.slicer.org/t/4dct-dicom-import-and-save/43135)

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**Author:** [@Amy\_Morton](https://discourse.slicer.org/u/Amy_Morton)\
**Replies:** 4\
**Last updated:** [May 30, 2025, 2:49pm UTC](https://discourse.slicer.org/t/4dct-dicom-import-and-save/43135 "2025-05-30T14:49:58Z")

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I found many helpful topics on the discourse, but still have yet to find a full soluiton: I have 100+ 4dct scans in dicom format, I’d like to import them and save as .nrrd or .seq.nrrd When loaded using the import dico…

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## [Simultaneously display a sequence at different indices](https://discourse.slicer.org/t/simultaneously-display-a-sequence-at-different-indices/42588)

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**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 12\
**Last updated:** [April 17, 2025, 4:56pm UTC](https://discourse.slicer.org/t/simultaneously-display-a-sequence-at-different-indices/42588 "2025-04-17T16:56:56Z")

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How would I go about displaying a sequence in the slice views where one 2D slice viewer is displaying the sequence at a given index and another 2D slicer viewer is displaying the same sequence at a different index? Cons…

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## [4D Cardiac CT: Does Sequence Registration also Captures Shear and Torsion?](https://discourse.slicer.org/t/4d-cardiac-ct-does-sequence-registration-also-captures-shear-and-torsion/42210)

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**Author:** [@Gening\_Dong](https://discourse.slicer.org/u/Gening_Dong)\
**Replies:** 0\
**Last updated:** [March 18, 2025, 7:12pm UTC](https://discourse.slicer.org/t/4d-cardiac-ct-does-sequence-registration-also-captures-shear-and-torsion/42210 "2025-03-18T19:12:04Z")

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Hi, I’m trying to use Sequence registration for 4D heart CT. For the chambers and blood field it has been working fine to capture the cardiac motion, but I was wondering if the the registration can also capture the shea…

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## [Sequence Registration - problem with menu](https://discourse.slicer.org/t/sequence-registration-problem-with-menu/41294)

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**Author:** [@eNable\_Polska](https://discourse.slicer.org/u/eNable_Polska)\
**Replies:** 5\
**Last updated:** [March 11, 2025, 1:09am UTC](https://discourse.slicer.org/t/sequence-registration-problem-with-menu/41294 "2025-03-11T01:09:55Z")

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Hello I came across a problem that I can’t solve. I have a sequential angioCT scan. I would like to make a 4D animation based on this scan. I found a tutorial https://youtu.be/qVgXdXEEVFU?si=ODlaC4UDf2wQ3bCW up to 0:56…

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## [Edit segmentation sequence](https://discourse.slicer.org/t/edit-segmentation-sequence/27682)

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**Author:** [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Replies:** 3\
**Last updated:** [December 27, 2024, 2:05pm UTC](https://discourse.slicer.org/t/edit-segmentation-sequence/27682 "2024-12-27T14:05:46Z")

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Once a segmentation sequence is created, is it possible to apply a threshold or other segmentation effects to all frames. Not frame by frame…

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## [For qMRMLNodeComboBox, how can I restrict Sequence nodes by type?](https://discourse.slicer.org/t/for-qmrmlnodecombobox-how-can-i-restrict-sequence-nodes-by-type/39959)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 3\
**Last updated:** [November 1, 2024, 8:18pm UTC](https://discourse.slicer.org/t/for-qmrmlnodecombobox-how-can-i-restrict-sequence-nodes-by-type/39959 "2024-11-01T20:18:41Z")

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I am working on a module to process a 4D data set. It will need to take as inputs a sequence node of segmentations and a sequence node of tables. Also present in the scene will be (possibly multple) sequence nodes of i…

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## [Segmentation of ultrasound sequence](https://discourse.slicer.org/t/segmentation-of-ultrasound-sequence/32869)

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**Author:** [@priya.vada4](https://discourse.slicer.org/u/priya.vada4)\
**Replies:** 2\
**Last updated:** [May 14, 2024, 9:27pm UTC](https://discourse.slicer.org/t/segmentation-of-ultrasound-sequence/32869 "2024-05-14T21:27:26Z")

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Hi Is it possible to segment a structure from a sequence of tracked ultrasound images and create a 3D surface model. These are the steps I follow: I stream the optically-tracked ultrasound images from a third-party …

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## [How do I use Sequences?](https://discourse.slicer.org/t/how-do-i-use-sequences/34768)

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**Author:** [@Jacqueline\_Banh](https://discourse.slicer.org/u/Jacqueline_Banh)\
**Replies:** 0\
**Last updated:** [March 8, 2024, 12:18am UTC](https://discourse.slicer.org/t/how-do-i-use-sequences/34768 "2024-03-08T00:18:13Z")

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Is it possible to load cine images into sequences? How do I load cine images into sequences?

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## [What is 3D Slicer's "built in time sequence" capabilities?](https://discourse.slicer.org/t/what-is-3d-slicers-built-in-time-sequence-capabilities/33998)

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**Author:** [@Jacqueline\_Banh](https://discourse.slicer.org/u/Jacqueline_Banh)\
**Replies:** 2\
**Last updated:** [January 27, 2024, 1:02am UTC](https://discourse.slicer.org/t/what-is-3d-slicers-built-in-time-sequence-capabilities/33998 "2024-01-27T01:02:00Z")

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Operating system: Slicer version: Expected behavior: Actual behavior:

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## [Python script to create an empty time sequence list](https://discourse.slicer.org/t/python-script-to-create-an-empty-time-sequence-list/33233)

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**Author:** [@admarques](https://discourse.slicer.org/u/admarques)\
**Replies:** 0\
**Last updated:** [December 5, 2023, 2:47pm UTC](https://discourse.slicer.org/t/python-script-to-create-an-empty-time-sequence-list/33233 "2023-12-05T14:47:46Z")

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I’m working with a CT image dataset containing different time phases. I would like to write a Python script to create an empty time sequence list as a placeholder to have these pre-created lists with specific names and …

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## [Visualize tracked ultrasound in 3D with PNG images and pose matrices](https://discourse.slicer.org/t/visualize-tracked-ultrasound-in-3d-with-png-images-and-pose-matrices/33096)

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**Author:** [@ziri](https://discourse.slicer.org/u/ziri)\
**Replies:** 1\
**Last updated:** [November 29, 2023, 3:39am UTC](https://discourse.slicer.org/t/visualize-tracked-ultrasound-in-3d-with-png-images-and-pose-matrices/33096 "2023-11-29T03:39:55Z")

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Hi, I’m trying to create a sequence file from a folder of ultrasound images in png format with poses stored in a csv file and then visualize in 3D. I successfully created the .mhd header file containing the pose informa…

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## [Slicer 5.4.0 Sequence Loading Breaks](https://discourse.slicer.org/t/slicer-5-4-0-sequence-loading-breaks/32927)

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**Author:** [@Liam\_S](https://discourse.slicer.org/u/Liam_S)\
**Replies:** 1\
**Last updated:** [November 21, 2023, 3:17pm UTC](https://discourse.slicer.org/t/slicer-5-4-0-sequence-loading-breaks/32927 "2023-11-21T15:17:31Z")

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Hi there I have a 4D CT dataset, already saved as an NRRD sequence. I load it into slicer, save the case (incl. mrml file but excluding rewriting any image files) in the same working directory as the image and close sli…

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## [Time average of sequence of transforms](https://discourse.slicer.org/t/time-average-of-sequence-of-transforms/31927)

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**Author:** [@Zimogre](https://discourse.slicer.org/u/Zimogre)\
**Replies:** 4\
**Last updated:** [October 2, 2023, 3:17pm UTC](https://discourse.slicer.org/t/time-average-of-sequence-of-transforms/31927 "2023-10-02T15:17:31Z")

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Hi all, I am recently working with a time series of volumes. First, I obtained a sequence (Sequence module) of volumes and then registered them using the SequenceRegistration module obtaining the corresponding Transform…

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## [Proxy Node Attributes lost after scene load](https://discourse.slicer.org/t/proxy-node-attributes-lost-after-scene-load/31607)

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**Author:** [@pfrwilson](https://discourse.slicer.org/u/pfrwilson)\
**Replies:** 2\
**Last updated:** [September 8, 2023, 5:30pm UTC](https://discourse.slicer.org/t/proxy-node-attributes-lost-after-scene-load/31607 "2023-09-08T17:30:34Z")

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I have created a sequence, sequence browser and proxy volume node. I gave the proxy volume node a whole bunch of attributes. However, after reloading the scene, the only attribute that is reloaded into the node is the Se…

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## [Exporting sequence annotation (2d + time)](https://discourse.slicer.org/t/exporting-sequence-annotation-2d-time/30163)

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**Author:** [@cams2b](https://discourse.slicer.org/u/cams2b)\
**Replies:** 0\
**Last updated:** [June 20, 2023, 6:26pm UTC](https://discourse.slicer.org/t/exporting-sequence-annotation-2d-time/30163 "2023-06-20T18:26:58Z")

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I am a new user of 3d slicer and I am working on segmenting 2d + time sequences. I have successfully annotated the sequences and I have saved the annotations as sequence files. I am now trying to export the annotations t…

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## [exporting sequence of stl files from segmentation of 4D dicom images](https://discourse.slicer.org/t/exporting-sequence-of-stl-files-from-segmentation-of-4d-dicom-images/29759)

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**Author:** [@Sanjib\_Gurung](https://discourse.slicer.org/u/Sanjib_Gurung)\
**Replies:** 1\
**Last updated:** [June 2, 2023, 11:38pm UTC](https://discourse.slicer.org/t/exporting-sequence-of-stl-files-from-segmentation-of-4d-dicom-images/29759 "2023-06-02T23:38:52Z")

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Hi, I am new to 3D slicer. I segmented a volume sequence of 4D cardiac MRI images. I need to export the sequence of segmented geometries as a sequence of stl files. Currently, I can only export an stl file at a time poi…

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## [Problems replicating an exported sequence](https://discourse.slicer.org/t/problems-replicating-an-exported-sequence/29727)

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**Author:** [@abravo](https://discourse.slicer.org/u/abravo)\
**Replies:** 2\
**Last updated:** [June 2, 2023, 4:35pm UTC](https://discourse.slicer.org/t/problems-replicating-an-exported-sequence/29727 "2023-06-02T16:35:32Z")

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Hello everyone, I have been trying to use the coordinates of some exported sequences from Slicer to replicate the movements in Blender for demonstration/learning purposes. These sequences have been recorded with slicer …

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## [Exporting Transformations from Sequence in 3D Slicer](https://discourse.slicer.org/t/exporting-transformations-from-sequence-in-3d-slicer/28868)

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**Author:** [@AliciaPose](https://discourse.slicer.org/u/AliciaPose)\
**Replies:** 7\
**Last updated:** [April 23, 2023, 12:52pm UTC](https://discourse.slicer.org/t/exporting-transformations-from-sequence-in-3d-slicer/28868 "2023-04-23T12:52:36Z")

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Hi everyone, I have a sequence in 3D Slicer that reproduces the movement of some 3D models by modifying their associated transforms. The sequence was originally recorded using a tracking system that navigated 4 differen…

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## [How to duplicate a vtkMRMLScalarVolumeNode using Python?](https://discourse.slicer.org/t/how-to-duplicate-a-vtkmrmlscalarvolumenode-using-python/28758)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 5\
**Last updated:** [April 6, 2023, 7:30pm UTC](https://discourse.slicer.org/t/how-to-duplicate-a-vtkmrmlscalarvolumenode-using-python/28758 "2023-04-06T19:30:21Z")

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Hi everyone, I am trying to duplicate a vtkMRMLScalarVolumeNode: node\_CopyVolume = slicer.mrmlScene.AddNewNodeByClass('vtkMRMLScalarVolumeNode') What can I do to copy the volume data from node\_OriginVolume to the node…

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## [Data node display nodes not maintained when creating a sequence](https://discourse.slicer.org/t/data-node-display-nodes-not-maintained-when-creating-a-sequence/28146)

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**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 14\
**Last updated:** [March 4, 2023, 10:17pm UTC](https://discourse.slicer.org/t/data-node-display-nodes-not-maintained-when-creating-a-sequence/28146 "2023-03-04T22:17:38Z")

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I’ve been having some issues creating a sequence where the display nodes of the given data nodes that I’m adding are not being maintained. I have a set of loaded 2D images where I have customized each of their display vo…

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## [Load multiple cardiac phases for segmentation/virtual reality](https://discourse.slicer.org/t/load-multiple-cardiac-phases-for-segmentation-virtual-reality/5214)

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**Author:** [@sarvpriya1985](https://discourse.slicer.org/u/sarvpriya1985)\
**Replies:** 25\
**Last updated:** [March 4, 2023, 4:09am UTC](https://discourse.slicer.org/t/load-multiple-cardiac-phases-for-segmentation-virtual-reality/5214 "2023-03-04T04:09:47Z")

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Operating system: windows 10 Slicer version: 4.10 Expected behavior: See cine motion of all phases in volume render/segmentation and then virtual reality Actual behavior: Not working Hello everyone, I read the prior…

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## [Linear transforms from SequenceRegistration module?](https://discourse.slicer.org/t/linear-transforms-from-sequenceregistration-module/28102)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 0\
**Last updated:** [March 1, 2023, 12:08am UTC](https://discourse.slicer.org/t/linear-transforms-from-sequenceregistration-module/28102 "2023-03-01T00:08:44Z")

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Is there a way to have the Sequence Registration module output linear transforms rather than grid transforms? I want to rigidly register a dynamic CT image sequence (to compensate for head turning motion) and SequenceRe…

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## [Segmentation of multi volume sequence](https://discourse.slicer.org/t/segmentation-of-multi-volume-sequence/5187)

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**Author:** [@Melanie](https://discourse.slicer.org/u/Melanie)\
**Replies:** 3\
**Last updated:** [December 27, 2018, 6:24am UTC](https://discourse.slicer.org/t/segmentation-of-multi-volume-sequence/5187 "2018-12-27T06:24:34Z")

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Hi , I am trying to segment bone from 4D Ct - multivolume sequence. Because of the displacement of bone from frame 1 to2 and thereafter , I cannot do one frame and do a registration. Looks like I have to manuallu segmen…

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## [How rotate images in a sequence?](https://discourse.slicer.org/t/how-rotate-images-in-a-sequence/26522)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 6\
**Last updated:** [December 3, 2022, 8:10pm UTC](https://discourse.slicer.org/t/how-rotate-images-in-a-sequence/26522 "2022-12-03T20:10:50Z")

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How to “anti-Transverse” for a sequence? Or, how to do inplane rotation for images in a sequence for 90 degree (not 3D rotation, but 2D in-plane rotation)? Hi everyone, I need help fixing a sequence of linear transform…

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## [3rd Proxy works only in SequenceBrowser 1, but not in SeqBrowser 2. What happened with the Scene file?](https://discourse.slicer.org/t/3rd-proxy-works-only-in-sequencebrowser-1-but-not-in-seqbrowser-2-what-happened-with-the-scene-file/25404)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 2\
**Last updated:** [November 7, 2022, 7:12pm UTC](https://discourse.slicer.org/t/3rd-proxy-works-only-in-sequencebrowser-1-but-not-in-seqbrowser-2-what-happened-with-the-scene-file/25404 "2022-11-07T19:12:51Z")

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Hi everyone, I saved a scene file that contains two SequenceBrowser info, each SequenceBrowser has three Sequence nodes. Please find the folder of the Scene files here However, after I re-load this scene file, the thi…

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## [How to remove NthDataNode from a vtkMRMLSequenceNode?](https://discourse.slicer.org/t/how-to-remove-nthdatanode-from-a-vtkmrmlsequencenode/26083)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 2\
**Last updated:** [November 6, 2022, 3:14pm UTC](https://discourse.slicer.org/t/how-to-remove-nthdatanode-from-a-vtkmrmlsequencenode/26083 "2022-11-06T15:14:13Z")

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Hi everyone, I am working on the scripted module development, trying to edit the vtkMRMLSequenceNode. However, did not find any functions like RemoveNthDataNode(). How could I remove the NthDataNode? Thank you very m…

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## [How to add a calculated (instead of data input from OpenIGTLInk IO) proxy node in SequenceBrowser when recording an ultrasound sequences?](https://discourse.slicer.org/t/how-to-add-a-calculated-instead-of-data-input-from-openigtlink-io-proxy-node-in-sequencebrowser-when-recording-an-ultrasound-sequences/25133)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 0\
**Last updated:** [September 7, 2022, 4:25am UTC](https://discourse.slicer.org/t/how-to-add-a-calculated-instead-of-data-input-from-openigtlink-io-proxy-node-in-sequencebrowser-when-recording-an-ultrasound-sequences/25133 "2022-09-07T04:25:22Z")

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Hi everyone, I am trying to write my first extension module to do a real-time ultrasound annotation. I am now able to write a module for offline annotation with ultrasound sequences recorded as SequenceBrowsers in modu…

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## [How to add an observer to the Sequence-Browser of module Sequences?](https://discourse.slicer.org/t/how-to-add-an-observer-to-the-sequence-browser-of-module-sequences/25129)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 1\
**Last updated:** [September 7, 2022, 3:52am UTC](https://discourse.slicer.org/t/how-to-add-an-observer-to-the-sequence-browser-of-module-sequences/25129 "2022-09-07T03:52:53Z")

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Hi everyone, I am trying to write my first extension module, and would like to synchronize the sequence browser in module Sequences and the module I am working on. How can I add an observer to the Sequence Browser of m…

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