| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1875704 | Applied Radiation and Isotopes | 2016 | 6 Pages |
•Energy shift of neutron spectrum transmitted through strong absorbing materials was studied.•A new approach was proposed for beam-hardening correction in neutron tomography.•MCNP simulated projection was adjusted for a correct tomographic reconstruction.•FBP method was used for two-dimensional (2D) image reconstruction.
In neutron imaging, the beam-hardening effect has a significant effect on quantitative and qualitative image interpretation. This study aims to propose a linearization method for beam-hardening correction. The proposed method is based on a new analytical approach establishing the attenuation coefficient as a function of neutron energy. Spectrum energy shift due to beam hardening is studied on the basis of Monte Carlo N-Particle (MCNP) simulated data and the analytical data. Good agreement between MCNP and analytical values has been found. Indeed, the beam-hardening effect is well supported in the proposed method. A correction procedure is developed to correct the errors of beam-hardening effect in neutron transmission, and therefore for projection data correction. The effectiveness of this procedure is determined by its application in correcting reconstructed images.
