METHOD FOR RECEIVING ENERGY -SELECTIVE IMAGE DATA, X-RAY DETECTOR AND X-RAY SYSTEM

摘要

A method and system for receiving energy selective image data relating to an examination object using a counting, digital X-ray detector, together with a counting, digital X-ray detector and an X-ray system are provided. The X-ray detector includes an X-ray converter for direct or indirect conversion of X-rays into an electrical signal, and a matrix including a plurality of counting pixel elements. For each pixel element of the plurality of counting pixel elements, at least one modifiable threshold value, above which an incoming signal is counted using a memory unit, is applicable.

主权项

1. A method for receiving energy selective image data relating to an examination object by a counting, digital X-ray detector of an X-ray system, wherein the counting, digital X-ray detector comprises an X-ray converter for direct or indirect conversion of X-rays into an electrical signal and a matrix comprising a plurality of pixel elements, wherein for each pixel element of the plurality of pixel elements, at least one threshold value, above which an incoming signal is counted in each case by a memory unit, is applicable, the method comprising:
applying X-rays during at least one time interval that includes a plurality of sub-time intervals; setting a first threshold value of the at least one threshold value in the counting, digital X-ray detector for a first sub-time interval of the plurality of sub-time intervals; converting X-ray quanta of the applied X-rays into first count signals while the first threshold value is applied, and storing the first count signals in the counting, digital X-ray detector; setting a second threshold value of the at least one threshold value in the counting, digital X-ray detector for each of at least one second sub-time interval of the plurality of sub-time intervals; converting X-ray quanta of the applied X-rays into second count signals while the second threshold value is applied and storing the second count signals in the counting, digital X-ray detector; reading the energy selective image data from the counting, digital X-ray detector; and displaying or storing the energy selective image data.