Patent ID: 8853614
Filing Date: 2014-10-07
Classification: A61B,G01N

Abstract:
1. A method for calibrating at least one detector array formed by a plurality of detectors that is exposed to a high energy, fan-shaped expanding radiation emanating from an approximately point-like energy source, serving the penetration of a material for measuring physical properties due to the absorption capacity of the material, comprising the steps of: entering successively at least two in each case homogeneously formed calibration bodies whose gradually differing absorption is designed in a way that the absorption capacity of the one calibration body is lower and the one of the other calibration body is higher than the absorption capacity of the material to be measured, into the beam path, measuring for each detector element in the detector array and for each calibration body the absorption capacity, i.e., the intensity of the radiation, assigning the absorption capacity of each calibration body to a known mass per unit area property of these calibration bodies, and interpolating the absorption capacity in mass per unit area sections between these known mass per unit area properties; wherein: initially, before the steps using calibration bodies, an interpolation of the absorption coefficient over the mass per unit area with full-irradiation is carried out for an interpolation of the intensity, and for each detector element the intensity is transformed to an e-function with constant u