Patent ID: 6377656
Filing Date: 2002-04-23
Classification: A61B,H05G

Abstract:
An X-ray control method in an X-ray apparatus including an X-ray tube for generating X-rays to irradiate an object under inspection, X-ray irradiation field limiting means for limiting an X-ray irradiation field and imaging means for picking up an X-ray image of said object under inspection, comprising:a step of arithmetically determining a mean value Mâ€² of a weighted histogram obtained by multiplying a histogram representing a distribution of numbers of data corresponding to image intensities in a reference image which is an X-ray image obtained from an output signal of said imaging means and a weighting function having a variable dependent on said image intensities; and a step of controlling output power of said X-ray tube so that said mean value Mâ€² approaches a mean value M of said weighting function.