Patent ID: 6724857
Filing Date: 2004-04-20
Classification: A61B,G01N

Abstract:
A radiation imaging method comprising the steps of:(a) sequentially detecting, by using radiation having a first wavelength, intensity of radiation transmitted through an object on a plurality of planes different in distance from the object in a first order of increasing or decreasing the distance from the object so as to obtain a first group of image signals representing radiation image information on said plurality of planes respectively; (b) sequentially detecting, by using radiation having a second wavelength different from the first wavelength, intensity of radiation transmitted through the object on a plurality of planes different in distance from the object in a second order reverse to the first order so as to obtain a second group of image signals representing radiation image information on said plurality of planes respectively; (c) restoring phase information of the radiation transmitted through the object on the basis of said first group of image signals and said second group of image signals so as to obtain plural pieces of phase data; and (d) generating image data on the basis of the plural pieces of phase data obtained at step (c).