Patent ID: 8243879
Filing Date: 2012-08-14
Classification: G21K

Abstract:
1. An imaging apparatus for X-ray phase contrast imaging, comprising: a source grating disposed between an X-ray source and a test object position; a phase grating modulating a phase of X-rays being transmitted through said source grating to form an interference pattern by Talbot interference; an absorption grating disposed at a position where the interference pattern is formed; and an X-ray image detector that detects X-rays transmitted through said absorption grating, wherein said source grating comprises a plurality of sub-gratings and a movable unit wherein the sub-gratings are formed by periodically arranging parts for shielding the X-rays which have a thickness for shielding X-rays at constant intervals, said plurality of sub-gratings are stacked in layers, and said movable unit is configured to move at least one of said sub-gratings to make a width of an aperture of said stacked sub-gratings, which aperture being an X-ray transmitting region, variable.