Determine extrinsic camera parameters X-ray

[Nick19111996]

Hi Vivek,

Thank you for sharing your work.

I am working on adapting the intrinsic and extrinsic camera parameters to the X-ray system that we use in our hospital by using this source --> https://pubmed.ncbi.nlm.nih.gov/27431651/ . The intrinsic parameters have been modified according to the parameters of our X-ray device, but I am uncertain about how to determine the extrinsic parameters for our system.

I assume the extrinsic parameters are related to a rigid transformation from the CT coordinate system to the X-ray image coordinate system and therefore determine the starting position of the virtual X-ray source. How can I determine this extrensic matrixt? Can I determine the translation part of the extrinsic matrix using the CT origin, center of rotation, or position of the detector?

Looking forward hearing from you,

Greetings, Nick