Source grating for x-rays, imaging apparatus for x-ray phase contrast image and x-ray computed tomography system
AssigneeCanon Kabushiki Kaisha
InventorsHidenosuke Itoh, Yoshikatsu Ichimura, Takashi Nakamura, Aya Imada
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Abstract
A source grating for X-rays and the like which can enhance spatial coherence and is used for X-ray phase contrast imaging is provided. The source grating for X-rays is disposed between an X-ray source and a test object and is used for X-ray phase contrast imaging. The source grating for X-rays includes a plurality of sub-gratings formed by periodically arranging projection parts each having a thickness shielding an X-ray at constant intervals. The plurality of sub-gratings are stacked in layers by being shifted.
Claims7
A source grating for X-rays disposed between an X-ray source and a test object, and used for X-ray phase contrast imaging, wherein
- the source grating for X-rays comprises a plurality of sub-gratings formed by periodically arranging projection parts each having a thickness shielding an X-ray at constant intervals,
- the plurality of sub-gratings are stacked in layers by being shifted to one another, and
- the source grating for X-rays has a structure in which a width of an aperture which is an X-ray transmitting region formed by an interval between the periodically arranged projection parts is made narrower than an aperture width of each of the sub-gratings.
Dependencies are inferred from the claim text.