Calvert, N; Betcke, MM; Morton, EJ; Speller, R; (2015) Reconstruction of electron density from time resolved in-plane Compton backscatter measurements. In: Proceedings: Three Dimensional Image Reconstruction in Radiology and Nuclear Medicine.

Text Calvert_reconstruction_of_electron_density_from_time.pdf - Published Version Access restricted to UCL open access staff Download (417kB)

Abstract

Time-of-Flight (ToF) x-ray Compton scatter imaging is a potential technique for reconstructing the electron densities of cargo containers in three dimensions. Currently the technique has been demonstrated experimentally using a collimated pencilbeam x-ray source. The present work proposes a method of reconstructing the electron density from fan-beam projections, making the method more efficient. An algebraic model is introduced and image reconstruction is performed using the TwIST algorithm. The reconstructed images contain several artefacts due to attenuation of the beam and using one fixed source position. It is envisaged that by introducing a moving source and using a non-linear image reconstruction technique, these problems will be reduced in future work.

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