I am trying to register a microCT scan of an implant with a conv. CT of the same implant within the jaw.
I transformed the microCT scan to the correct position however the final 3d-3d registration fails. Even when I resample the microCT image to the same voxel sizes (which means a significant reduction of the visualization of the implant).
I also tried elastix modul.
So my question is, whether there is a chance at all to automatically register them or is manual the best I can achieve?
I uploaded an example of the manual transformation outcome…
Yes the registration would need to recover the rotation around the long axis of the implant.
I want to register the uCT scan of the implant with the same implant in a jaw from a conventional CT scan. For the registration I need to mask out everything except the implant, which seems to work with the mask tool.
After the registration, I want to transfer the implant position to a CT scan from a jaw without any implants, i.e. fuse 2 scalar volumes using add scalar volumes.
I tried substract scalar vol (because faster compared to add) which results in a “black” implant in the ct scan of the jaw, however I get deteriorated voxels around the “black” implant in the extent of a box which I want to avoid.
Is there an option for “transparent” voxels, so that the voxels of the other CT scan are not changed around the “blanked out” implant.
Finally, I would prefer the add scalar vol option as I would need the implant in the CT scan to be as in uCT.
There is no need for “transparent” voxels, just set voxel values outside the implant to 0. Adding/subtracting 0 will not alter the volume.
You can use Threshold scalar volume to set values outside a chosen intensity range to 0.
If you want to fine-tune what happens at the implant’s boundary then you can use Segment Editor’s Mask volume effect (provided by SegmentEditorExtraEffects extension).
