Hello everybody, I’m trying to register a CT volume with a 2D XA (fluoroscopic image). My issue is to find the projection plane from CT volume that matches with the XA one using DICOM information of fluoroscopic image like SID, SOD, Primary and Secondary Angles etc. I have found “DRR generation” m…

Hi domP. In general, it is not easy to recover these parameters if they are not recorded. You might need to do 2D-3D registration. But before doing that, you should first constrain the results: Review the DICOM header of the XA, including private tags, to see what information is available. You…

On modern C-arms SID, SOD, and anatomical angles are all available in standard DICOM tags. However, these are mostly just approximate values. The reported angles may have a few degrees error, SOD assumes that the object is at a specific distance above the table in the center, mechanical deformation …

Yes, it would be good to see those header values. Also, I don’t know what is meant by “projection plane.” What parameterization do you seek?

Hi Andras, in what way could I use DICOM informations for an initial guess for registration? I have the gantry angles (Primary and Secondary Angles), SID and SOD.

The goal of 2D/3D registration is to determine all the unknown projection parameters. You would need to have a good initial guess for all these parameters and then use a non-linear optimizer to tune them so that you get better match between the DRR and the actual fluoro image. SID, SOD, and primare …

Thanks for the reply. However, I can’t understand in which way I can use these parameters. For example, in DRR generation module, I have to set these parameters: [Screenshot (1)] What are “View-Up vector” and “Normal Vector” ? In what way I can set them? Are they have any relationship with Primar…

Specifying view up and normal vector is a common way to parametrize camera orientation in computer graphics. Primary and secondary angles is a different parametrization of camera orientation - see the DICOM standard for exact definition.

[image] Programmer wanted for Registration workflow Development Development Hello all, We are looking for a freelancer or dedicated programmer for our slicer based navigation system development. Currently we require to implement the following task: The task: We need to…

Get projection plane in 2D-3D Registration

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drvarunagarwal (Varun Agarwal) November 3, 2024, 11:02am 9

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Get projection plane in 2D-3D Registration

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