X-ray imaging based on image data from a photon-counting multi-bin X-ray detector

An apparatus configured to perform image reconstruction based on image data from a photon-counting multi-bin x-ray detector,

• wherein said apparatus is configured to determine parameters of a given functional form of the relationship between assigned comparator settings expressed in voltage in the read-out chain of the x-ray detector and the corresponding energy threshold values expressed in energy based on a fitting procedure between a first set of data representative of a measured pulse height spectrum and a second set of data representative of a reference pulse height spectrum, and
• wherein said apparatus is configured to perform image reconstruction based on the image data and the determined parameters.

A computer-program product comprising a computer-readable medium having stored thereon a computer program for use with a photon-counting multi-bin x-ray detector, said computer program comprising instructions, which when executed by at least one processor, cause the at least one processor to:

• determine parameters of a given functional form of the relationship between assigned comparator settings expressed in voltage in the read-out chain of the x-ray detector and the corresponding energy threshold values expressed in energy based on a fitting procedure between a first set of data representative of a measured pulse height spectrum and a second set of data representative of a reference pulse height spectrum, and
• perform image reconstruction based on image data from the x-ray detector and the determined parameters.

An apparatus for supporting image reconstruction based on image data from a photon-counting x-ray detector, wherein said apparatus comprises:

• a determination module for determining parameters of a given functional form of the relationship between assigned comparator settings expressed in voltage in the read-out chain of the x-ray detector and the corresponding energy threshold values expressed in energy based on a fitting procedure between a first set of data representative of a measured pulse height spectrum and a second set of data representative of a reference pulse height spectrum, and
• an output module for outputting the determined parameters to an image reconstruction system for enabling adjustments in the image reconstruction procedure based on the determined parameters.