title: X-ray Photon Counting and Two-Color X-ray Imaging Using Indirect Detection.
abstract: In this paper, we report on the design and performance of a 1 cm², 90 × 92-pixel image sensor. It is made X-ray sensitive by the use of a scintillator. Its pixels have a charge packet counting circuit topology with two channels, each realizing a different charge packet size threshold and analog domain event counting. Here, the sensor's performance was measured in setups representative of a medical X-ray environment. Further, two-energy-level photon counting performance is demonstrated, and its capabilities and limitations are documented. We then provide an outlook on future improvements.
authors.affiliation: Caeleste CVBA, Hendrik Consciencestraat 1 b, 2800 Mechelen, Belgium. Bart.Dierickx@caeleste.be.
authors.forename: Bart
authors.initials: B
authors.lastname: Dierickx
authors.affiliation: Caeleste CVBA, Hendrik Consciencestraat 1 b, 2800 Mechelen, Belgium. Qiang.yao@caeleste.be.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yao
authors.affiliation: Caeleste CVBA, Hendrik Consciencestraat 1 b, 2800 Mechelen, Belgium. Nick.witvrouwen@caeleste.be.
authors.forename: Nick
authors.initials: N
authors.lastname: Witvrouwen
authors.affiliation: Caeleste CVBA, Hendrik Consciencestraat 1 b, 2800 Mechelen, Belgium. Dirk.uwaerts@caeleste.be.
authors.forename: Dirk
authors.initials: D
authors.lastname: Uwaerts
authors.affiliation: Caeleste CVBA, Hendrik Consciencestraat 1 b, 2800 Mechelen, Belgium. Stijn.vandewiele@caeleste.be.
authors.forename: Stijn
authors.initials: S
authors.lastname: Vandewiele
authors.affiliation: Caeleste CVBA, Hendrik Consciencestraat 1 b, 2800 Mechelen, Belgium. Peng.gao@caeleste.be.
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
keywords: X-ray photon counting; color X-ray; scintillator; spectral X-ray