Successive reconstruction algorithm for coded aperture imaging from multi-angle projections

Coded aperture imaging (CAI) is one of emission computed tomography techniques. In CAI, a gamma camera equipped with a coded aperture is utilized to reconstruct 3-D distribution of radionuclide from projection data. In conventional CAI, the position and attitude of the camera should be held stationary until a projection data with sufficiently large count of gamma ray is obtained. To overcome this restriction, we propose a successive reconstruction algorithm from projections obtained at different positions and attitudes. The efficacy of this method will be shown by some results of numerical simulation.