How to save the 3D medical image reconstructed by the volume drawing algorithm as a PLY file to the local computer

mmXIO · November 28, 2022, 1:49pm

lassoan · November 29, 2022, 2:05am

Direct volume rendering using raycasting is a display technique and you cannot store its result in a surface mesh (.ply file). See more detailed discussion of this topic on the Slicer forum:

mmXIO · November 30, 2022, 7:37am

Thank you very much for your answer. Can I ask one more question? If I want the rendering results to be displayed on a web page, is there a suitable way?

lassoan · November 30, 2022, 1:30pm

Yes, there are many ways to use VTK’s volume renderer in a web browser:

trame
vtk.js
run your current desktop VTK code in a docker container; view it in the web browser using novnc (for example, run this command to run the VTK-based 3D Slicer application in your web browser at the URL http://127.0.0.1:8080/: docker run -d -p 8080:8080 --name slicer stevepieper/slicer:5.0.3)

mmXIO · November 30, 2022, 2:02pm

I’m a noob and thank you very much for your answer. My Volume Rendering is programmed in C++, the web system is written in Java and Js. I want to display the Volume Rendering results on the web page, can it be implemented through network transmission? If not, which way is appropriate?

lassoan · November 30, 2022, 6:40pm

If you don’t want to touch the C++ code then the first and third option (trame and docker+novnc) should work. The only non-trivial part is that you need to set up a reverse proxy server that launches a new server (docker container or trame server) for each client and makes each client communicate with its own server.

mmXIO · December 1, 2022, 1:57am

Thanks, I’ll give it a try.

mmXIO · December 3, 2022, 3:49am

Hello, Can I use vtkWindowToImageFilter to get a series of volume drawing rendered images and Transfer these pictures to the front-end to generate a 3D model?

lassoan · December 3, 2022, 4:17am

Yes, absolutely, this works. Fortunately, you don’t even need to implement this, because this is exactly what Trame does when you use it in remote rendering mode.

mmXIO · December 3, 2022, 4:19am

But my code is written in C++, and I learned a bit about trame, which uses python. Does trame support C++?

lassoan · December 3, 2022, 4:44am

Yes, it works for C++ classes, too. You can expose any vtkRenderWindow in the web browser using vtkRemoteView. This is how ParaView (implemented in C++) is made available via Trame using remote rendering. You only need a few small Python files to describe your view layout and if you want to use any web widgets.

mmXIO · December 3, 2022, 4:56am

Thank you very much for your answer! I will try it.

mmXIO · January 14, 2023, 5:00am

Hello, long time no see.
I now use the vtk server, using the remoteview method to display the volume drawing results on the web page, but I found that the only pictures presented on the web page are pictures. I now have a question: I want to achieve cutting through interaction with the web page, how should I do it? On the back end, I used boxwidget2 to implement cutting,

but when I rendered the web page with remote rendering, there was no box surrounding the image, which confused me.