How to get a ROI to fit volume in the Volume Rendering module with python?

[jumbojing]

@jumbojing

@Juicy

> # Create a new ROI
roiNode = slicer.mrmlScene.AddNewNodeByClass("vtkMRMLAnnotationROINode")
# Make new parameter node in order to use the crop volume module programmatically
crop_module = slicer.vtkMRMLCropVolumeParametersNode()
# Add parameter node to the scene
slicer.mrmlScene.AddNode(crop_module)
# Set the volume as the input volume in the crop volume module
crop_module.SetInputVolumeNodeID(volumeNode.GetID())
# Set output volume as the same volume to overwrite original volume (only needed if you actually want to crop the volume)
crop_module.SetOutputVolumeNodeID(volumeNode.GetID())
# Set the input ROI
crop_module.SetROINodeID(roiNode.GetID())
# Use the Fit ROI to Volume function of the crop volume module
slicer.modules.cropvolume.logic().FitROIToInputVolume(crop_module)
> ```

roiNode.SetName("ROI")
roiNode.SetXYZ(PP)
roiNode.SetRadiusXYZ(50, 50, 50)

我是这样定义ROI大小的…