Method and device for calibrating an X-ray scanner by means of at least one phantom.

摘要

Method and device for calibrating an X-ray scanner, characterised by the fact that the lengths dij (57) of the pathways of the X-rays are first calculated by means of the phantom image; the theoretical attenuations Acij (58) are then calculated, as well as the attenuations Amij (59) measured on the image. From the above there is then deduced the coefficient of proportionality K between the values Acij and Amij to obtain the values for K.Aci. The values KAci and Ami are used to calculate (66 and 68) the corrections to be carried out per channel as a function of the attenuation. <IMAGE>