High Quality Reconstruction of Insufficient Tomographic Data by a New Iterative Procedure

Abstract

In order to demonstrate the challenging tasks in current R amp;D applications in the field of renewable energy sources experimental neutron and electron tomographic data sets of PEM fuel cell components are processed by an advanced version of the DIRECTT algorithm. The neutron measurements of the water distribution suffer from several intrinsic limitations such as massive position dependent focal smearing due to the large primary neutron beam aperture. Electron TEM tomography allows characterisation of nanometre sized catalyst particles but is hampered by the following restrictions partial opacity, a limited sector of projections missing wedge , very few projections, samples exceeding the detector size region of interest and improper angular alignment. Beyond the capabilities of other algorithms DIRECTT proves to overcome these essential reconstruction problems, in comparison to FBP and SIRT. Nevertheless, careful data pre processing is an inevitable requirement in order to fully exploit the algorithm amp; 8223;s potential