The KEST (K-Edge Spectral micro-Tomography) project aims at proposing a K-edge Computed Tomography (CT) setup based on a conventional X-ray source and the photon counting CdTe detector Pixirad-I/Pixie-III. With accurate tuning of energy thresholds and source settings, the proposed setup is able to produce in a single exposure two images (one above and one below) the K-edge of a specific element, such as e.g. a contrast agent. Doing so, the contrast and virtual non-contrast images are available in a single acquisition. This opens to potential applications of this technique for in vivo spectral small animals imaging.



Brun, F. et al. Inpainting approaches to fill in detector gaps in phase contrast computed tomography (2018) Measurement Science and Technology, 29 (1), art. no. 014001.


Conference proceedings

Brun, F. et al. Towards in vivo K-edge X-ray micro-CT with the Pixirad-I/Pixie-III detector (2019) IFMBE Proceedings, 68 (1), pp. 123-126.

Di Trapani et al. Characterization of noise and efficiency of the Pixirad-1/Pixie-III CdTe X-ray imaging detector (2018) Journal of Instrumentation, 13 (12), art. no. C12008.

Brun, F. et al. K-edge spectral computed tomography with a photon counting detector and discrete reconstruction (2018) Proceedings of the Annual International Conference of the IEEE EMBC, art. no. 8513425.



Official beamtime has been awarded at Elettra, ESRF, and Diamond Light Source.


For more information please contact: francesco.brun@ts.infn.it.