Angular variation of scattering volume and its implications for Compton scattering tomography |
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| Affiliation: | 1. KU Leuven, Department of Mechanical Engineering, Celestijnenlaan 300 B, box 2420, B-3001 Heverlee, Belgium;2. DMMS Lab, Flanders Make, Belgium;1. Centre for Engineering Dynamics, University of Liverpool, UK;2. Institute for Risk and Uncertainty, University of Liverpool, UK;3. School of Engineering, Manchester Metropolitan University, UK;4. Centre for Materials and Structures, University of Liverpool, UK |
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| Abstract: | If quantitative and qualitative precision is to be achieved in X-/γ-rays Compton scattering densitometry and tomography, the volume of interaction within which a useful signal is collected must be well defined and accurately estimated. This work presents a numerical study of the variation of scattering angles and collimator sizes. The effect of choosing back-scattering angles for measurement in both the densitometry and tomographic modes of this technique is studied. A symmetry is observed between the volume at forward and back scattering angles. A symmetry exists, however, within the scattering angle range 90±30°. It is proposed that the best volume/spatial resolution in Compton scattering densitometry/tomography is obtainable within the above mentioned scattering angle range. |
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