Spectral computed tomography(CT) based on photon counting detectors(PCDs) is a well-researched topic in the field of X-ray imaging. When PCD is applied in a spectral CT system, the PCD energy threshol
In this study,the activity concentrations of 226Ra,232Th,222Rn,and 40K,emanation fractions (P),equilibrium equivalent concentration (EEC),and mass exhalation ra