Séminaire du 5 mai 2023

CT image reconstruction by the exact solution construction method of the discrete Radon transform

Takaoki Takanashi, RIKEN,Japon

Résumé : Since the Radon transform, the principle of CT image reconstruction, is defined in continuous space and has an exact solution, there is a one-to-one correspondence between the projection image (sinogram) and the tomographic image (reconstructed image). However, this one-to-one correspondence is broken because the actual system is discretized. In this presentation, we show that the one-to-one correspondence can be recovered by deforming the discretization and constructing an exact solution. We also present an evaluation of X-ray CT reconstructed images using this method.