Photon-Counting-Detector-Computed-Tomography (PCD-CT) is a promising new technique for Computed Tomography (CT) imaging. Compared to traditional Energy-Integrating-Detector (EID) CT systems, PCD-CT allows for more refined image reconstruction and lower radiation doses due to its higher energy resolution. Typically, Cadmium Zinc Telluride (CZT) hybrid -pixel detectors are used for PCD-CT. The Application Specific Integrated Circuit ( ASIC ), used in CZT hybrid pixel detectors, must feature a high counting rate to prevent signal pile-up. An ASIC named Topmetal-PCD for CZT hybrid pixel detectors ...