Method for obtaining an item of X-ray-spectrum information about pixels in a grid pattern

A method for obtaining information relating to X-ray quanta in an X-ray system including an X-ray source and an X-ray detector having an array of pixel elements, each having a photodiode for registering light quanta, and a scintillator arranged over the array of photodiodes, comprising:

• selecting a low X-ray dose for the X-ray source such that for each instance of operating the X-ray source, only a fraction of the individual photodiodes are impinged by light quanta from the X-ray source,
• determining the fraction of impinged photodiodes from a read-out of the X-ray detector, and
• determining a read-out frequency for the X-ray detector based on the selected X-ray dose multiplied by the fraction of impinged photodiodes determined from the read-out of the X-ray detector;
• and
• operating the X-ray detector according to the determined read-out frequency.

A method for obtaining information relating to X-ray quanta in an X-ray system including an X-ray source and an X-ray detector having an array of pixel elements, each having a photodiode for registering light quanta, and a scintillator arranged over the array of photodiodes, comprising:

• selecting a low X-ray dose for the X-ray source such that for each instance of operating the X-ray source, only a fraction of the individual photodiodes are impinged by light quanta from the X-ray source,
• selecting a read-out frequency for the X-ray detector;
• and
• operating the X-ray source and X-ray detector according to the selected dose and read-out frequency,
• for a plurality of times, operating the X-ray source according to the selected dose and reading out the pixel elements using the selected read-out frequency to obtain a respective total energy of the light quanta impinging upon individual pixel elements and, for at least one X-ray quantum, deriving the energy of the X-ray quantum for a respective pixel element from total energies in accordance with a predefined rule;
• and
• combining the obtained information about the energy of X-ray quanta assigned to the pixel elements.