Yannan Jin,Peter Michael Edic,Vladimir A. Lobastov,Hewei Gao,Geng Fu
申请号：
US14145018
公开号：
US20150182176A1
申请日:
2013.12.31
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A system includes an energy-discriminating, photon-counting X-ray detector, comprising a plurality of detector cells providing measurements corresponding to at least two energy bins and being adapted to produce projection data in response to X-ray photons that reach the X-ray detector and to produce an electrical signal having a recorded count for the energy bins and a total energy intensity. The system also includes data processing circuitry adapted to receive the electrical signal from one or more of the plurality of detector cells, to generate a simulated count rate for each of the energy bins by using the total energy intensity in a detector pile-up model, to determine a set of energy intensity dependent material decomposition vectors, and, for the projection data measured by one or more of the plurality of detector cells, to perform material decomposition by modeling the simulated count rate for each of the energy bins and utilizing a material decomposition vector selected from the set of energy intensity dependent material decomposition vectors and corresponding to the measured energy intensity from one or more of the plurality of detector cells.
