Patent ID: 6661869
Filing Date: 2003-12-09
Classification: G01N

Abstract:
A method of constructing an image of an object using at least two X-ray absorbance profiles, the method comprising the steps of;a) filling the object to be imaged with an X-ray agent, the X-ray agent attenuating X-rays; b) generating at least two one-dimensional X-ray absorbance profiles with respect to a pre-selected plane of the object by irradiating said agent-filled object with X-rays from at least two directions; c) producing a two-dimensional image by back-projecting said at least two one-dimensional X-ray absorbance profiles; d) transforming said two-dimensional image into a two-dimensional binary image; e) forward-projecting said two-dimensional binary image into at least two one-dimensional projections, wherein said one-dimensional X-ray absorbance profiles and said one-dimensional projections correspond to each other; f) estimating a difference between each said X-ray absorbance profile and each corresponding projection; and g) producing a corrected two-dimensional image by normalizing said difference throughout said two-dimensional binary image.