Segmentation not displayed in Weasis v4.6.0

[Stefania Paperini]

Hi!

I have a couple of problems with the display of the segmentation object (Segmentation Storage (1.2.840.10008.5.1.4.1.1.66.4) in Weasis.

The first problem is about updating from v4.5.1 to v4.6.0: in v4.6.0 the Segmentation example that you can lunch from the web page: https://weasis.org/en/tutorials/dicom-segmentation/ doesn't work anymore (at least for me).

Also the segmentation object that I created and that I could display together with the corresponding ultrasound volume cannot be displayed anymore. 

In this case, that worked fine with v4.5.1, each frame of my ultrasound volume was saved in different Dicom files and I referenced the SOP instances in the tag:  (0008, 1155) (Referenced SOP Instance UID) in the "Per Frame Functional Group Sequence" (5200, 9230) of the Segmentation object.

The second problem is that if I save the ultrasound volume as Enhanced Ultrasound Volume, in only one multiframe Dicom file, the Segmentation object cannot be displayed, not even with Weasis v.4.5.1.

In this case I have only one volume file to reference and I try to put the tag:  (0008, 1155)  both in the "Per Frame Functional Group Sequence" (5200, 9230) (here having the same "Referenced SOP Instance UID" value for each frame) and in the Shared Functional Groups Sequence (5200, 9229) (so only one value for the "Referenced SOP Instance UID") but without any luck.

Can you suggest a way to display the Segmentation object as overlay of a multiframe volume in Weasis? 

Thank you a lot!

All the best,

Stefania

[Nicolas Roduit]

Thank you for reporting these issues.
In version 4.6.0, files containing more than 400 segmentation frames have been deactivated due to performance concerns (with some cases it freezes the application). This is a temporary measure while we work on resolving display issues related to segmentation objects. As a result, some files may not be displayed as expected.
For the second issue, could you provide a sample and open an issue.

[Stefania Paperini]

Hi Nicolas,

thank you for your answer. I created the issue in github: Segmentation object not correctly displayed with Enhanced US Volume #666 

In github there was not the possibility to add the dicom files, so I will attach them here.

I checked them for conformity with the dciodvfy.exe tool of David Clunie. If I need to make some adjustments in order to display the segmentation in Weasis, just let me know.

 enhancedUSVolume.dcm

 segmentation_enhancedUSVolume.dcm

I will also attach the log files, in case they help.

Thank you for investigating the problem!

 Stefania

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[Nicolas Roduit]

See my response at #666

[Stefania Paperini]

Hi Nicolas,

Thanks a lot!

I opened an additional issue (https://github.com/nroduit/Weasis/issues/673) that could be also related to #667 (not sure about the correlation, though). I attach the input Dicom files here.

 Case 5Thyroid_2025-05-21_16-32-16_Volume_2022-10-05_11-38-56.zip

All the best,

Stefania

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