Image reconstruction technique for neutron penumbra imaging

The principle of the neutron penumbra imaging was introduced, and the effect factors of the resolution of the imaging system were analyzed. The neutron penumbra imaging process was simulated with MCNP software. The coded image of one point source on the imaging principal axis and that of two point souces off the principal axis with and without noise and background were reconstructed by the improved inverse filter and Wiener filter method respectively. The simulation results indicated that the Wiener filter method could restrain noise better.