X-ray phase contrast imaging device

Abstract

The invention provides an X-ray phase difference imaging device. This X-ray phase difference imaging device includes a plurality of gratings and a grating holding unit for holding each of the plurality of gratings. The plurality of gratings are arranged such that a direction in which the grating constituent portions of the plurality of gratings extends in a plane perpendicular to the optical axis of the X-rays is along a direction in which a positional shift due to the grating holding portion is the largest.

Description

technical field [0001] The invention relates to an X-ray phase difference imaging device, in particular to an X-ray phase difference imaging device which uses a Talbot interferometer to generate absorption images, phase differential images and dark field images. Background technique [0002] Conventionally, there is known an X-ray phase difference imaging device that generates an absorption image, a phase differential image, and a dark field image using a Talbot interferometer. Such an X-ray phase difference imaging device is disclosed, for example, in International Publication No. 2014 / 030115. [0003] The X-ray phase difference imaging device disclosed in International Publication No. 2014 / 030115 includes an X-ray source, a multi-slit, a phase grating, an absorption grating, a detector, and a stepping device for moving the phase grating in steps. The X-ray phase difference imaging device disclosed in International Publication No. 2014 / 030115 moves a phase grating stepwise...

AI Technical Summary

Problems solved by technology

[0006] However, in the X-ray phase difference imaging device disclosed in International Publication No. 2014 / 030115, the position of each grating is shifted in a plane perpendicular to the direction of the X-ray optical axis due to the grating holding part holding the grating during imaging. In the case of , the relative position of the self-image of the phase grating and the absorption grating shifts

In the case where the relative position of the self image of the phase grating and the absorption grating is shifted in the direction orthogonal to the direction in which the grating constituting portion of the grating extends, there is a problem that the shape of the acquired step curve changes , so the image quality of the generated phase differential image and dark field image deteriorates

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