Optimization and Initial Diagnostic Performance of Photon-Counting Detector CT for Rectal Cancer T Staging

> .05). Conclusion In participants with RC, portal venous abdominal PCD CT at 40 keV and with QIR-4 yielded the optimal image quality for RC T staging, showed enhanced T3-T4 diagnostic performance among less-experienced radiologists, and achieved performance that was comparable to that of MRI. © RSNA, 2025