Photon-counting CT (PCCT) provides intrinsic spectral imaging, higher spatial resolution, and improved dose efficiency compared with energy-integrating detector CT [1-5]. Achieving diagnostic-grade PCCT requires tight control of detector linearity, spectral fidelity, and count-rate performance to limit distortion from charge sharing and pulse pileup [1,4,6,7]. The Pyxis™ platform integrates detector hardware and real-time corrections into a […]