Modelling the physics in the iterative reconstruction for transmission computed tomography
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- 5 June 2013
- journal article
- review article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 58 (12), R63-R96
- https://doi.org/10.1088/0031-9155/58/12/r63
Abstract
There is an increasing interest in iterative reconstruction (IR) as a key tool to improve quality and increase applicability of X-ray CT imaging. IR has the ability to significantly reduce patient dose, it provides the flexibility to reconstruct images from arbitrary X-ray system geometries and it allows to include detailed models of photon transport and detection physics, to accurately correct for a wide variety of image degrading effects. This paper reviews discretisation issues and modelling of finite spatial resolution, Compton scatter in the scanned object, data noise and the energy spectrum. Widespread implementation of IR with highly accurate model-based correction, however, still requires significant effort. In addition, new hardware will provide new opportunities and challenges to improve CT with new modelling.Keywords
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