Abstract: An X-ray phase imaging apparatus includes an X-ray source; a detector; a plurality of gratings; an image processor configured to generate two or more types of first phase contrast images selected from absorption, differential phase and dark-field images as preview images under an imaging condition simpler than an imaging condition for a second phase contrast image to be captured in actual imaging; and a controller configured to display the first phase contrast images on a display.

Abstract: An X-ray phase imaging apparatus includes a control device configured or programmed to make a notification prompting a user to update or generate a corresponding second X-ray image when determining that a decrease in an image quality of an X-ray phase contrast image generated based on a first X-ray image obtained by imaging a subject and a second X-ray image obtained by imaging without the subject arranged does not fall within a predetermined allowable range and/or determining that the second X-ray image associated with an imaging condition has not been stored.

Abstract: An X-ray phase imaging apparatus includes an X-ray source; a detector; a plurality of gratings; a rotation mechanism; an image processor configured to generate a phase contrast image and to generate a preview image prior to capture of the phase contrast image; and a controller configured to control function of displaying on a display the preview image, and function of discriminatively displaying on the display an image coverage area for the phase contrast image that is associated with a relative rotation angle between the plurality of gratings and a subject.

Abstract: This X-ray phase imaging system includes a plurality of gratings including a first grating that is irradiated with X-rays from an X-ray source and a second grating that is irradiated with X-rays from the first grating. The X-ray phase imaging system includes an imaging unit that optically images a subject and one or both of the first grating and the second grating.

Abstract: .alpha.-Substituted ureido-benzylpenicillanic acids of the formula ##STR1## (wherein R.sup.1, X and Y are as defined in the description) and pharmaceutically acceptable salts thereof, and a bactericidal composition comprising the above penicillanic acid or the salt and a pharmaceutically acceptable carrier are disclosed. The acids and salts thereof have high antibacterial activities against Gram-positive and Gram-negative bacteria, particularly those of the genus Pseudomonas.