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This shows the result of the rigid registration. The MRI64 volume is placed inside the Xf1_Rigid transform. Overall position is now aligned, but shape differences remain.[br] ;3. Rigid Registration ;This shows the mask images used to exclude the aliasing portions of th image from influencing the registration. We build these masks manually using the Editor threshold and brush tools. The masks need not be overly precise, as long as they exclude most of the aliasing artifact they will suffice for the purpose of masking the registration. Rigid and affine registration will still work without the masks, but the nonrigid likely will need them. ;2_Masks ;This shows the two original unregistered knee MRIs.We will register MRI64 to the reference MRI58, in a sequence of first rigid, then affine and finally non-rigid BSpline transforms. ;unregistered ;Scene at MRML file save point ;Slicer Data Bundle Scene View_1 ;This shows rhe result of nonrigid (BSpline) registration. Unlike rigid and affine, nonrigid transfoms require resampling to visualize. Note that shapes agree much better now in the main region of interest (the cartilage). Residual differences remain; these are 2 different subjects. ;5. BSpline Registration ;Scene at MRML file save point ;Master Scene View ;This shows the result of the affine registration. MRI64 volume is placed inside the Xf2_Affine transform. Alignment is significantly improved compared to the Rigid version.[br] ;4. Affine Registration ;





Created 08/19/2013
Uploaded by Jean-Christophe Fillion-Robin
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