| 主权项 |
1. A detector data processing apparatus comprising:
an input interface (IU) for receiving measurement data detected by a multi-bin radiation energy detector comprising a number of detector bins, the data detected during a measurement of radiation previously interacting with an object of interest, the data detected by the detector during a measurement operation for an M-fold material decomposition with M≧2 and less than the number of detector bins; a data transformer (T) configured to transform the detected measurement data into radiation attenuation data whilst correcting for a measurement error caused by the detector changing its responsiveness during the measurement operation, the transformer (T) using a radiation-matter interaction model including: i) a data parameter that is a parameter for the data detected by the detector bins; ii) M-fold material decomposition variables; and iii) a variable for a detector state that causes the change in the detector's responsiveness; the transformer (T) configured to solve the model for the material decomposition variables alongside the detector state variable thereby effecting the correction; an output unit (OU) configured to output the solved for material variables as the corrected radiation attenuation data. |
