Operating system: Windows 10 Slicer version:4.11 Hello Slicer community, I am unable to create accurate grey scale model so that its quality matches up to the standards of Volume rendering at the point of registration, somehow there is always a difference of 2-5mm in volume rendering and model af…

A surface mesh (closed surface representation of segmentation) will never be able to match what a dense 3D point cloud (volume rendering) can display. If you want exact match between volume rendering and segmentation (or model) display then you need to dumb down the volume rendering to isosurface r…

Thank you @lassoan for your reply. I will try it and get back to you soon with the results Regards Nayan

Hello @lassoan Is there a way to perform ICP registration without making a model, current method that is available for the ICP, is the fiducial model registration(in SlicerIGT), for the model making is the mandatory step, but we want to perform the ICP on surface/volume rendering. What would be t…

ICP registration requires a mesh and a point cloud (or another mesh). Volume rendering does not provide a mesh (a solid surface): the depth where a point is placed when you click on volume-rendered image depends on the viewing angle. Therefore, you cannot use ICP to register a volume with a model. Y…

I do not know whether ITK would be the good platform to ask this question, but I will try to be more specific with my query. What current navigations systems are using for the registration procedures is the surface/volume rendering(IMO), for the ICP registration, but with the current IGT module we …

In Slicer/SlicerIGT you get a full toolbox of modules allows you to experiment with a wide range of patient registration tools (landmark registration, point to surface registration, surface scan based registration, tracked ultrasound-guided registration, 3D printed guide based registration, fiducial…

Thank Lasso for the detailed reply, We are doing it for Neurosurgeries, and we have automated all the things, the thing we could not achieve is the good accuracy of surface registration with the model, whatever the threshold we set, it always has a large error, we have tried it multiple times, in o…

There could be many reasons for registration inaccuracy. If you can attach a couple of images showing your surfaces and landmarks, and the resulting mismatched surface then it may give some clues. Partial surface registration (register only those part pf the surface meshes that are near the region …

Dear @mau_igna_06 I went through the tutorial of your tools, I don’t think it is useful for me. Thank you for the support.

Differences in between volume rendering and gray scale model in Registration

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mau_igna_06 (Mauro I. Dominguez) December 20, 2021, 4:39pm 9

Did you check if Partial Surface Registration is useful for you?

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Differences in between volume rendering and gray scale model in Registration

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