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This shows original baseline and follow-up scans before registration. We used two different colormaps to better show the two scans superimposed. We will register the follow-up to the baseline with first a rigid and then an affine transform. ;1. unregistered ;Scene at MRML file save point ;Master Scene View ;This shows the result after masked affine registration. Note that the residual differences apparent after rigid registration are now mostly absent. ;3b. Affine Registration ;This shows the result of the rigid registration. Note that no resampling occurred, instead the follow-up scan is placed inside the transform node (Xf1_Rigid). This is done in the Data module. Note that there is residual misalignment originating from the two scans being acquired with different protocols. We can correct for this using additional DOF, while being cautious to not have the tumor (which reflects actual change) contribute to the transform.[br] ;2. Rigid Registration ;This shows the mask generated for use in the affine registration. We use this mask to prevent the tumor from contributing to the nonrigid portions of the registration. The mask need not be extremely precise. It suffices to have the general tumor region excluded. We generate the mask by thresholding the entire volume and then removing the tumor region with a large brush set to paint with label 0.[br] ;0. Masking ;Scene at MRML file save point ;Slicer Data Bundle Scene View_4 ;Scene at MRML file save point ;Slicer Data Bundle Scene View ;Scene at MRML file save point ;Slicer Data Bundle Scene View_2 ;Scene at MRML file save point ;Slicer Data Bundle Scene View_1 ;





Created 08/19/2013
Uploaded by Dominik Meier
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