Patent ID: 8995613
Filing Date: 2015-03-31
Classification: A61B,G01N,G21K

Abstract:
1. An X-ray imaging apparatus which takes an image of an object to be detected, comprising: a first grating configured to form a periodic bright-dark pattern by a Talbot effect, on the basis of an X-ray from an X-ray source; a second grating, disposed at a position where the bright-dark pattern is formed, configured to block a part of the bright-dark pattern; a detector configured to detect an X-ray intensity distribution of the X-ray which passed through the second grating; and a calculator configured to calculate phase information of the X-ray on the basis of the X-ray intensity distribution detected by the detector, wherein the second grating includes a first region in which a first blocking pattern has been formed and a second region in which a second blocking pattern has been formed, wherein a direction in which the first blocking pattern blocks a bright section of the bright-dark pattern and a direction in which the second blocking pattern blocks the bright section of the bright-dark pattern are different from each other, wherein the calculator calculates the phase information by obtaining a ratio of a sum of X-ray intensity information of the X-ray which passed through the first region and was detected in a pixel P wherein i is an integer equal to or greater than one.