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Reconstruction of electron density from time resolved in-plane Compton backscatter measurements

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. Green open access

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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.

Type: Proceedings paper
Title: Reconstruction of electron density from time resolved in-plane Compton backscatter measurements
Event: 13th Fully Three Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 13-16 June 2013, Lake Tahoe, California, USA
Open access status: An open access version is available from UCL Discovery
Language: English
Keywords: X-ray, Compton Scatter, Time-of-Flight, Image Reconstruction, Cargo Security.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1476220
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