An energy- and depth-dependent model for x-ray imaging.

摘要: In this paper, we model an x-ray imaging system, paying special attention to the energy- and depth-dependent characteristics of inputs interactions: x rays are polychromatic, interaction depth conversion optical photons is energy-dependent, scattering collection efficiency depend on interaction. The construct a random function point process that begins with distribution incident phosphor ends being detected by active area detector pixels form image. We show how point-process representation can be used calculate characteristic statistics model. then simulate Gd2O2S:Tb phosphor, estimate its statistics, proceed signal-detection experiment investigate impact pixel fill factor detecting spherical calcifications (the signal). two extremes possible from SNR2 does not change or changes in proportion factor. our results, between these extremes, depends diameter signal.