UpdateBot: Nightly -> 4.4

2014-12-25T06:53:10Z

Nightly -> 4.4

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<noinclude>{{documentation/versioncheck}}</noinclude>
__TOC__

=Community-contributed modules=

Usage: save the .py file to a directory, add the directory to the additional module paths in the Slicer application settings (choose in the menu: Edit / Application settings, click Modules, click >> next to Additional module paths, click Add, and choose the .py file's location).

==Filters==
* [https://raw.github.com/pieper/VolumeMasker/master/VolumeMasker.py VolumeMasker.py]: Update a target volume with the results of setting all input volume voxels to 0 except for those that correspond to a selected label value in an input label map (Used for example in the volume rendering in [https://www.youtube.com/watch?v=dfu2gugHLHs this video).

==DICOM==
* [https://gist.github.com/pieper/6186477 dicom header browser] to easily scroll through dicom files using dcmdump.

==Informatics==
* [https://subversion.assembla.com/svn/slicerrt/trunk/SlicerRt/sandbox/MarkupsInfoModule/MarkupsInfo.py MarkupsInfo.py]: Compute the total length between all the points of a markup list.
* [https://subversion.assembla.com/svn/slicerrt/trunk/SlicerRt/sandbox/LineProfile/LineProfile.py LineProfile.py]: Compute intensity profile in a volume along a line.

=Community-contributed examples=

Usage: Copy-paste the shown code lines or linked .py file contents into Python console in Slicer.

==Capture==
* Get a MRML node in the scene based on the node name and call methods of that object. For the MRHead sample data:
vol=slicer.util.getNode('MR*')
vol.GetImageData().GetDimensions()
* Capture the full Slicer screen and save it into a file
img = qt.QPixmap.grabWidget(slicer.util.mainWindow()).toImage()
img.save('c:/tmp/test.png')
* [https://subversion.assembla.com/svn/slicerrt/trunk/SlicerRt/sandbox/CaptureRotationVideo/CaptureRotationVideo.py CaptureRotationVideo.py]: Capture a video of the scene rotating in the 3D view

==Launching Slicer==
* How to open an .mrb file with Slicer at the command line?
Slicer.exe --python-code "slicer.util.loadScene( 'f:/2013-08-23-Scene.mrb' )"
* How to run a script in the Slicer environment in batch mode (without showing any graphical user interface)?
Slicer.exe --python-code "doSomething; doSomethingElse; etc." --testing --no-splash --no-main-window

==DICOM==
* How to access tags of DICOM images imported into Slicer? For example, to print the first patient's first study's first series' "0020,0032" field:
db=slicer.dicomDatabase
patientList=db.patients()
studyList=db.studiesForPatient(patientList[0])
seriesList=db.seriesForStudy(studyList[0])
fileList=db.filesForSeries(seriesList[0])
print db.fileValue(fileList[0],'0020,0032')

* How to access tag of a volume loaded from DICOM? For example, get the patient position stored in a volume:
volumeName='2: ENT IMRT'
n=slicer.util.getNode(volumeName)
instUids=n.GetAttribute('DICOM.instanceUIDs').split()
filename=slicer.dicomDatabase.fileForInstance(instUids[0])
print slicer.dicomDatabase.fileValue(filename,'0018,5100')

==Toolbar functions==
* How to turn on slice intersections in the crosshair menu on the toolbar:
viewNodes = slicer.mrmlScene.GetNodesByClass('vtkMRMLSliceCompositeNode')
viewNodes.UnRegister(slicer.mrmlScene)
viewNodes.InitTraversal()
viewNode = viewNodes.GetNextItemAsObject()
while viewNode:
viewNode.SetSliceIntersectionVisibility(1)
viewNode = viewNodes.GetNextItemAsObject()

How to find similar functions? For this one I searched for "slice intersections" text in the whole slicer source code, found that the function is implemented in Base\QTGUI\qSlicerViewersToolBar.cxx, then translated the qSlicerViewersToolBarPrivate::setSliceIntersectionVisible(bool visible) method to Python.

==Manipulating objects in the slice viewer==
* How to define/edit a circular region of interest in a slice viewer?

Drop two markup points on a slice view and copy-paste the code below into the Python console. After this, as you move the markups you’ll see a circle following the markups.

# Update the sphere from the fiducial points
def UpdateSphere(param1, param2):
centerPointCoord = [0.0, 0.0, 0.0]
markups.GetNthFiducialPosition(0,centerPointCoord)
circumferencePointCoord = [0.0, 0.0, 0.0]
markups.GetNthFiducialPosition(1,circumferencePointCoord)
sphere.SetCenter(centerPointCoord)
radius=math.sqrt((centerPointCoord[0]-circumferencePointCoord[0])**2+(centerPointCoord[1]-circumferencePointCoord[1])**2+(centerPointCoord[2]-circumferencePointCoord[2])**2)
sphere.SetRadius(radius)
sphere.SetPhiResolution(30)
sphere.SetThetaResolution(30)
sphere.Update()

# Get a reference to the markup
markups=slicer.util.getNode('F')
# Create the sphere that will intersect the slice viewer
sphere = vtk.vtkSphereSource()
# Initial positioning of the sphere
UpdateSphere(0,0)
# Create model node and add to scene
model = slicer.vtkMRMLModelNode()
model.SetAndObservePolyData(sphere.GetOutput())
modelDisplay = slicer.vtkMRMLModelDisplayNode()
modelDisplay.SetSliceIntersectionVisibility(True) # Show in slice view
modelDisplay.SetVisibility(False) # Hide in 3D view
slicer.mrmlScene.AddNode(modelDisplay)
model.SetAndObserveDisplayNodeID(modelDisplay.GetID())
modelDisplay.SetInputPolyData(model.GetPolyData())
slicer.mrmlScene.AddNode(model)
# Call UpdateSphere whenever the fiducials are changed
markups.AddObserver("ModifiedEvent", UpdateSphere, 2)

== Add a texture mapped plane to the scene as a model ==
Note that model textures are not exposed in the GUI and are not saved in the scene
<pre>
# use dummy image data here
e = vtk.vtkImageEllipsoidSource()

scene = slicer.mrmlScene

# Create model node
model = slicer.vtkMRMLModelNode()
model.SetScene(scene)
model.SetName(scene.GenerateUniqueName("2DImageModel"))

planeSource = vtk.vtkPlaneSource()
model.SetAndObservePolyData(planeSource.GetOutput())

# Create display node
modelDisplay = slicer.vtkMRMLModelDisplayNode()
modelDisplay.SetColor(1,1,0) # yellow
modelDisplay.SetBackfaceCulling(0)
modelDisplay.SetScene(scene)
scene.AddNode(modelDisplay)
model.SetAndObserveDisplayNodeID(modelDisplay.GetID())

# Add to scene
modelDisplay.SetAndObserveTextureImageData(e.GetOutput())
scene.AddNode(model)

transform = slicer.vtkMRMLLinearTransformNode()
scene.AddNode(transform)
model.SetAndObserveTransformNodeID(transform.GetID())

vTransform = vtk.vtkTransform()
vTransform.Scale(50,50,50)
vTransform.RotateX(30)
transform.SetAndObserveMatrixTransformToParent(vTransform.GetMatrix())
</pre>

== Clone a volume ==
This example shows how to clone the MRHead sample volume, including its pixel data and display settings.
<pre>
sourceVolumeNode = slicer.util.getNode('MRHead')
volumesLogic = slicer.modules.volumes.logic()
clonedVolumeNode = volumesLogic.CloneVolume(slicer.mrmlScene, sourceVolumeNode, 'Cloned volume')
</pre>

== Modify voxels in a volume ==
This example shows how to change voxels values of the MRHead sample volume.
The values will be computed by function f(r,a,s,) = (r-10)*(r-10)+(a+15)*(a+15)+s*s.
<pre>
volumeNode=slicer.util.getNode('MRHead')
ijkToRas = vtk.vtkMatrix4x4()
volumeNode.GetIJKToRASMatrix(ijkToRas)
imageData=volumeNode.GetImageData()
extent = imageData.GetExtent()
for k in xrange(extent[4], extent[5]+1):
for j in xrange(extent[2], extent[3]+1):
for i in xrange(extent[0], extent[1]+1):
position_Ijk=[i, j, k, 1]
position_Ras=ijkToRas.MultiplyPoint(position_Ijk)
r=position_Ras[0]
a=position_Ras[1]
s=position_Ras[2]
functionValue=(r-10)*(r-10)+(a+15)*(a+15)+s*s
imageData.SetScalarComponentFromDouble(i,j,k,0,functionValue)
imageData.SetScalarComponentFromFloat(distortionVectorPosition_Ijk[0], distortionVectorPosition_Ijk[1], distortionVectorPosition_Ijk[2], 0, fillValue)
imageData.Modified()
</pre>

== Manipulate a Slice View ==

<pre>
>>> lm = slicer.app.layoutManager()
>>> red = lm.sliceWidget('Red')
>>> redLogic = red.sliceLogic()
>>> redLogic.GetSliceOffset()
-10.214302062988281
>>> redLogic.SetSliceOffset(20)
</pre>

Documentation/4.4/ScriptRepository - Revision history

UpdateBot: Nightly -> 4.4