Tomographic Image Reconstruction for the Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Initial Measurements with the Prototype Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

“…This offset ensures that none of the slits interrogates duplicate chords. Note that the design reported in [4,5] used 96 slits, which corresponds to 1/3 the number of neutron detector readout channels needed to instrument a full detector ring. The cost of the collimator scaled with the number of septa; when building the collimator, some cost reduction was needed to fit within the project budget.…”

“…The derivation of the update equation is valid if the 𝑦 * are Poisson distributed. The response 𝑨 for the imager is calculated as described in [5]. At present, detailed investigation of convergence criteria and speed of convergence was not performed.…”

“…The physics design of this imager was previously reported in [3][4][6][7][8]. Development of the iterative reconstruction code used to perform tomographic reconstruction, the imager response calculation used by the reconstruction code, and the results of reconstructions of simulated tomographic imaging measurements for the prototype imager design were documented in [5].…”