Patent ID: 7382908

Claim:
A method for correction of intensity inhomogeneities in a digital radiation image comprising: (1) exposing an object to radiation emitted by a source of radiation, (2) recording a diagnostic radiation image of said object on a radiation-sensitive recording member, (3) reading the diagnostic radiation image that has been recorded on said recording member and converting the read image into a digital image representation, wherein said digital image representation at least comprises a digital representation of a direct exposure area and of diagnostic areas, (4) generating a mathematical model of a cause of said intensity inhomogeneities, (5) image segmenting said digital image representation in order to extract data representing an estimation of the direct exposure area, (6) deducing parameters of said mathematical model from image data corresponding to said direct exposure area, (7) generating a bias field on the basis of the deduced parameters, (8) correcting said image by means of said bias field so as to obtain a corrected image, (9) subjecting the corrected image to a stopping criterion, steps (5) to (9) are repeated on the corrected image until the stopping criterion is met.