Patent ID: 9664801
Date: 2017-05-30
CPC Classifications: A61B,G01T

Claim:
1. A method for determining an attenuation of x-ray radiation as a result of the x-ray radiation penetrating through an object to be examined, the method comprising: receiving a signal of x-ray radiation intensity at a computer, the computer including a processor and a memory, wherein the processor establishes an intensity of the x-ray radiation, respectively before and after penetrating the object; determines the spectral composition of the x-ray radiation prior to the x-ray radiation penetrating the object, said spectral composition being taken into account when determining the attenuation; calculates a ratio, between the intensity of the x-ray radiation established after the penetration and the intensity of the x-ray radiation established prior to the penetration, for the respectively same energy range; determines the attenuation using the calculated ratio and the determined spectral composition in the determination of the attenuation; and reconstructs an image corrected for inaccuarcies due at least to time variation of the determined x-ray spectrum based on the determined attenuation.