RADIOLOGICAL IMAGE CAPTURING APPARATUS AND RADIOLOGICAL IMAGE CAPTURING SYSTEM

摘要

There is described a radiological image capturing apparatus, which makes it possible to obtain a good X ray image in which contrast of the peripheral portions are emphasized by employing the Talbot interferometer method and the Talbot-Lau interferometer method. The apparatus is provided with an X-ray tube, a multi-slit member, a first diffraction grating, a second diffraction grating and an X-ray detector. The second diffraction grating contacts the X-ray detector. A distance L between the multi-slit element and the first diffraction grating is set to be not less than 0.5 m, a distance Z1 between the first diffraction grating and the second diffraction grating is set to be not less than 0.05 m, and a slit interval distance d0 of the multi-slit element is set to be not less than 2 μm. With the settings, the abovementioned good X-ray image can be obtained by using the Talbot-Lau interferometer system.

主权项

1. A radiological image capturing apparatus comprising:
an X ray tube to emit X rays; a subject placing plate; a plurality of gratings; and an X-ray detector to detect the X rays, which have passed through the plurality of gratings, wherein, the plurality of gratings are relatively moved to perform a plurality of capturing, and an image of captured site of a subject is reconstructed based on the generated plurality of images; a joint of a finger is the capturing site of the subject; the X ray tube, the subject placing plate, the plurality of gratings and the X ray detector are aligned so that an emitting direction of the X ray emitted to the X ray detector from the X ray tube through the subject placing plate and the plurality of gratings is a vertical direction with respect to a floor surface; and the subject placing plate projects outside from an edge portion of the X ray detector in a horizontal direction toward a patient side, and a portion from a finger to an elbow of the subject can be placed on the subject placing plate.