Scatter simulation and correction in computed tomography: A reconstruction-integrated approach modelling the forward projection
| Autor: | Theobald Fuchs, Kilian Dremel |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2017 |
| Předmět: |
Engineering
Photon business.industry Scattering object scattering Mechanical Engineering Resolution (electron density) computed tomography Context (language use) Iterative reconstruction Scintillator Radiation Condensed Matter Physics 01 natural sciences 030218 nuclear medicine & medical imaging 010309 optics 03 medical and health sciences 0302 clinical medicine Optics model-based reconstruction 0103 physical sciences General Materials Science business Projection (set theory) |
| Zdroj: | NDT & E International. 86:132-139 |
| ISSN: | 0963-8695 |
| DOI: | 10.1016/j.ndteint.2016.12.002 |
| Popis: | Scattered photons lower the quality of the reconstructed images in computed tomography. Additionally to scattering in the scintillator material that lowers the resolution, object-scattered photons cause artefacts due to non-linear absorption and are difficult to simulate. In the context of model-based reconstruction we developed a fast approximation for scattered radiation that is integrated in the forward projection of an iterative polychromatic reconstruction method. We develop the modelling of scattered intensities in an iterative maximum-likelihood reconstruction method, demonstrate a comparison with Monte-Carlo simulated scatter-data and show the result of reconstructed data within the field of industrial non-destructive testing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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