Patent ID: 8718228
Filing Date: 2014-05-06
Classification: A61B,G02B,G21K

Abstract:
1. A phase grating used for X-ray phase imaging, comprising: a first diffraction grating in which a first projection part whose thickness is formed so that an in-coming X-ray transmits with a phase π-shifted, and a first aperture part with a same aperture width as a width of the first projection part, are cyclically arranged in a cyclic direction; and a second diffraction grating in which a second projection part with a same width as the width of the first projection part, and a second aperture part with a same aperture width as the aperture width of the first aperture part, are cyclically arranged in a cyclic direction, wherein the cyclic direction of the first diffraction grating is the cyclic direction of the second diffraction grating, and the second diffraction grating is formed as displaced by ¼-pitch on the first diffraction grating.