Tomographie spectrale à comptage de photons~: développement du prototype PIXSCAN et preuve de concept

M. Dupont 1
1 imXgam
CPPM - Centre de Physique des Particules de Marseille
Abstract : In the field of preclinical X-ray tomography, spectral tomography is actively explorated. The aims of spectral tomography are the caracterisation of tissues and contrast agents together with the quantification of the latter and the enhancement of contrast between soft tissues. This is achieved by the exploitation of spectral information (i.e. energy) and not only the detected quantities of X-ray photons. The interest in spectral tomography is enforced by the arrival of photon counting cameras like the hybrid pixel detector XPAD3, because of their ability to select photons according to their energy. The XPAD3 camera was built to be used in the micro-CT prototype PIXSCAN developped at CPPM. In this context, this thesis has two goals: first a contribution to the developement of the PIXSCAN prototype and second a realisation with it of a proof of concept of spectral tomography. The first goal is achieved by developing the data acquisition system of PIXSCAN. To accomplish the second objective, we will perform spectral tomography by implementing component separation in order to isolate photoelectric, Compton and contrast agent contributions. This work begins with the characterisation of this method and ends by a proof of concept on real data acquired with the PIXSCAN prototype.
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https://tel.archives-ouvertes.fr/tel-01019735
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Submitted on : Monday, July 7, 2014 - 2:03:09 PM
Last modification on : Wednesday, April 4, 2018 - 2:18:03 PM
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M. Dupont. Tomographie spectrale à comptage de photons~: développement du prototype PIXSCAN et preuve de concept. Ingénierie biomédicale. Aix-Marseille Université, 2014. Français. ⟨tel-01019735⟩

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