CT with dual optimal reading: Compatibility of the two data sets and interpolation issues.

The geometry of CT d’Or (Dual Optimal Reading), presented in another abstract for this conference, acquires data for two independent but complementary reconstructions using a special mask to collimate the fan beam. However, 25 % of the pixels in the sinogram must be calculated through interpolation. In this contribution, we explain the structure of the data and thus the need for that interpolation. We compare experimental results of both kind of reconstructions, obtained with a simplified test-device. Additionally, we show the potential of new 2D-interpolation methods within the reconstruction algorithm OPED (Orthogonal Polynomial Expansion on Disc), for which the geometry of CT d’Or is optimally suited