| 主权项 |
1. An imaging system for generating an image of an object, the imaging system comprising:
a measured projection data providing unit for providing spectral measured projection data and non-spectral measured projection data, wherein the spectral measured projection data and the non-spectral measured projection data have been generated by a detector having spectral detection elements and non-spectral detection elements, respectively, based on radiation having traversed an imaging region including the object, an estimation unit for estimating spectral estimated projection data, which correspond to radiation paths ending at the non-spectral detection elements, wherein for estimating a spectral estimated projection data value for a radiation path ending at a non-spectral detection element the estimation unit is adapted to a) determine a model material distribution within the imaging region, which could have caused a non-spectral measured projection data value that corresponds to the radiation path, based on the non-spectral measured projection data and b) simulate a measurement of the spectral estimated projection data value based on the model material distribution, a reconstruction unit for reconstructing an image of the object based on the spectral measured projection data and the spectral estimated projection data. |
