Model and Segment rendering issues with 4.10 (and 4.11)

Support
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1

I have been using the isodose module to make isodose models. It worked in 4.8 but with 4.10 the 2D isolines do not display correctly - they do not change properly as I scroll through the slices - the lines do not change shape the just start to disappear as on the red and yellow windows…

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… If I change the size of the windows (e.g. by moving the program to a different monitor) they detatch from the images and do not align at all…

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I have also had issues with the volume segment editor module. Even using a simple tool such as paint it does not render properly with all kinds of odd lines…

ERROR
ERROR1852×1080 208 KB

…and if I persevere the program freezes or crashes.

I have tried the latest nightly, I have tried unistalling and reinstalling without any additional modules etc - and I have also tried using the experimental rendering method. Nothing seems to make any difference.

Does anyone know what is going on?

2

So it seems it was not slicer that was at fault at all…

I downloaded and installed the latest graphics drivers for my card and now everything is working as expected.

Sorry for any inconvenience.

1 Like
3

Great news, thanks for reporting and also for following up!

So now both Segment Editor and Isodose work properly?

4

Yes the the isodoses and segmentations are now working perfectly. The only thing I’ve not managed to fix is a widget I made to render a surface volume at precise dose levels using a slider.

First, in set up I create a volume display node

  # Display node for 3D volumes
  volRenLogic = slicer.modules.volumerendering.logic()
  volumeDisplayNode = volRenLogic.CreateVolumeRenderingDisplayNode()
  slicer.mrmlScene.AddNode(volumeDisplayNode)
  volumeDisplayNode.UnRegister(volRenLogic)
  self.threeDVolumeDisplayNode = volumeDisplayNode

Later, after calculating my doses, I set the parameters for the 3D display updating the display node whenever the foreNode changed

  # and volume render the dose
  volRenLogic = slicer.modules.volumerendering.logic()
  volRenLogic.UpdateDisplayNodeFromVolumeNode(self.threeDVolumeDisplayNode, foreNode)
  # sets the window parameters for the 3D volume where the volume is rendered
  layoutManager = slicer.app.layoutManager()
  threeDWidget = layoutManager.threeDWidget(0)
  controller = threeDWidget.threeDController()
  threeDView = threeDWidget.threeDView()
  controller.set3DAxisVisible(False)
  controller.set3DAxisLabelVisible(False)
  controller.setOrientationMarkerType(2)
  controller.setOrthographicModeEnabled(True)
  controller.spinView(True)
  threeDView.lookFromViewAxis(ctk.ctkAxesWidget.Anterior)
  threeDView.resetCamera(False, True, True)
  threeDView.resetFocalPoint()

I then changed the threshold of the volume using a slider bar / dose selector…

def onChangeThresholdSliderWidget(self, value):
propNode = self.threeDVolumeDisplayNode.GetVolumePropertyNode()
volumeProp = propNode.GetVolumeProperty()
volRenLogic = slicer.modules.volumerendering.logic()
max = self.volumeThresholdSliderWidget.maximum
volRenLogic.SetThresholdToVolumeProp([0,max],[value,max], volumeProp, False, True)

this all worked beautifully in 4.8 but not in 4.10. I’m not really sure what’s going on – I can get a (I’m not sure if it’s the same) volume display node to appear if I go to volume rendering and choose the node it was created from, but my slider no longer affects it. If I play with it too much the whole thing crashes.
I’m sure this is to do with differences in how volume rendering is now handled and I suspect that I should be doing something simpler - but I’m struggling to figure exactly what it is I need to change. Perhaps there is some documentation that I’ve missed that someone could point me towards?

5

Volume rendering changed quite a bit internally after 4.8.1. There have been discussions about this, they will probably help. Such as this: