Sequence Browsing: Loss of Spatial Movement After Saving in Slicer

Support
1

Hi everyone!
First of all, I’d like to thank you for your availability!

I’m using fCal to receive ultrasound images from a frame grabber while simultaneously acquiring spatial information from the sensor attached to the probe (I’m using the Aurora motion tracking system). After performing the calibrations, I used the Plus Server to stream the TrackedVideoStream channel, where I sent Name=“Image” with EmbeddedTransformToFrame=“Tracker”.

To perform the reconstructions in Slicer, I recorded the frames over time using the Sequence Browsing module and then proceeded with the reconstruction. The problem is that when I save the sequence for later visualization, upon reloading it in Slicer, I can no longer see the frames moving spatially. I only get a static spatial frame, although the images are being updated. However, when I record the sequence in real-time and then click on the sequence visualization, it does move through the 3D space.

Am I doing something wrong?
I would really appreciate any help!

2

Can you share a sample data set (upload somewhere and post the link here)?

3

Good afternoon! Thank you for your quick response!
In the meantime, I managed to understand what my mistake was, but another question came up. Is it possible to define a 2D window to crop each frame individually, instead of using a 3D region of interest?
This is because when I use the Crop Volume Sequence module, I end up defining a 3D region that captures areas that are not of interest, while also missing areas that should be included, as the frames are not static (since it is a freehand scan). Is there a way to achieve this? Something that would allow me to apply a crop directly to the image received from the Plus server, so I can then work with the region of interest only for the sequence recording?
Thank you so much for your help!