Comparison of the phase and absorption contrast tomographic reconstruction

Mehdi Toumi; Wei Zhou; Jovan G. Brankov

doi:10.1117/12.2549754

16 March 2020 Comparison of the phase and absorption contrast tomographic reconstruction

Mehdi Toumi, Wei Zhou, Jovan G. Brankov

Proceedings Volume 11312, Medical Imaging 2020: Physics of Medical Imaging; 1131250 (2020) https://doi.org/10.1117/12.2549754
Event: SPIE Medical Imaging, 2020, Houston, Texas, United States

Abstract

Analyzer-based Imaging (ABI) belongs to a broader family of phase-contrast (PC) X-ray techniques. PC measures X-ray deflection phenomena when interacting with tissue, which is known to provide higher contrast images of soft tissue than other X-ray methods. This has a very important interest in the medical field, specially for mammogram applications. This paper presents a simulation study to compare the sensitivity of filtered back projection of absorption based imaging (implemented by FDK - a method usually used in the conventional X-ray computed tomography) and the phase contrast tomographic imaging. These results are based on previously proposed simulation tool for a table-top ABI systems using a conventional polychromatic X-ray source. In our experiments we evaluated images obtained under different errors in reconstruction parameters namely: the detector’s offset in position, the distance source to the detector (DSD) or source to the object (DSO).

Citation Download Citation

Mehdi Toumi, Wei Zhou, and Jovan G. Brankov "Comparison of the phase and absorption contrast tomographic reconstruction", Proc. SPIE 11312, Medical Imaging 2020: Physics of Medical Imaging, 1131250 (16 March 2020); https://doi.org/10.1117/12.2549754

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