Abstract: An imaging control apparatus obtains a plurality of images at different radiation energies, the images having been obtained as a result of irradiating a subject with radiation whose energy changes during one shot, and detecting, a plurality of times, the radiation that has passed through the subject during the one shot; generates an energy subtraction image by performing energy subtraction processing using a plurality of images; and generates a difference image using a plurality of generated energy subtraction images.

Abstract: The present invention relates to a method for preventing transmission of influenza, wherein said method comprises administering an effective amount of a compound to a patient having an influenza virus infection, herein referred to as “index patient”, wherein the compound has one of the formulae (I) and (II), or its pharmaceutically acceptable salt. The compound to be used in the present invention reduces infectivity of the influenza virus of the index patient, and therefore, reduces the risk of the index patient to trigger an influenza epidemic or an influenza pandemic as compared to a control patient.

Abstract: A radiation imaging apparatus includes a pixel array having a plurality of pixels configured to detect radiation, and a controller configured to obtain a radiation generation condition related to a radiation generating apparatus during fluoroscopic imaging, and determine, during the fluoroscopic imaging, timings of a plurality of sampling and holding operations in each of the plurality of pixels in accordance with the radiation generation condition. The timing of at least one sampling and holding operation is a timing in an irradiation period of radiation, and each of the plurality of pixels includes a conversion element configured to convert radiation into an electrical signal, and a sample and hold circuit configured to sample and hold signals from the conversion element multiple times in accordance with the timings, determined by the controller, of the plurality of sampling and holding operations.

Abstract: An image processing apparatus obtains at least three radiation images obtained based on radiation emitted onto an object, and corresponding to at least three types of energy, and separates a predetermined substance having a known attenuation coefficient in the object and a remaining substance other than the predetermined substance in the object, based on the at least three radiation images and calculating an effective atomic number of the remaining substance.

Abstract: A radiation imaging apparatus comprises a generating unit configured to generate a material characteristic image with respect to a plurality of materials included in a radiation image that has been captured using different radiation energies; and a reconstructing unit configured to set different radiation energies for the respective plurality of materials, and to generate a reconstructed image based on monochromatic radiation images of the respective materials, the monochromatic radiation images being based on the different radiation energies.

Abstract: A radiation imaging apparatus includes: an image obtaining unit configured to obtain image data corresponding to incident radiation; and an image processing unit configured to perform first bone density measurement based on image data obtained by the image obtaining unit with a first exposure field and perform second bone density measurement based on image data obtained by the image obtaining unit with a second exposure field narrower than the first exposure field.

Abstract: A medical image processing apparatus comprising: a setting unit configured to set a plurality of candidate regions on a medical image as candidates of a region of interest to be set on the medical image; an analysis unit configured to execute quantitative analysis concerning a composition of an object for each of the plurality of candidate regions; and an output unit configured to output a plurality of analysis results and the plurality of candidate regions in association with each other.

Abstract: A radiation imaging apparatus comprises an image generating unit configured to generate a material characteristic image by using a plurality of radiation images of different radiation energy levels; an evaluation information calculation unit configured to calculate evaluation information which indicates a correlation between a plurality of material characteristic images; and a scattered ray amount estimation unit configured to estimate, based on the evaluation information, an amount of scattered rays included in the plurality of radiation images.

Abstract: An X-ray image processing apparatus comprising: a first obtaining unit configured to obtain a first X-ray image including an object; a second obtaining unit configured to obtain a first measured value associated with an X-ray condition of the first X-ray image, a second X-ray image that does not include the object, and a second measured value associated with an X-ray condition of the second X-ray image; a gain correction unit configured to correct the first X-ray image based on the first measured value, the second X-ray image, and the second measured value; and an image generation unit configured to generate an evaluation image for evaluating a state of the object based on a corrected image that is the first X-ray image corrected by the gain correction unit.

Abstract: An X-ray diagnosis apparatus controls to display information based on an error in an index value evaluating a state of a bone of an object based on at least one of a captured image of the object and an imaging condition which correspond to X-rays with two different types of energies.

Abstract: A radiation imaging system comprises: an image obtaining unit including a radiation detecting unit in which pixels configured to output signals according to a dose of irradiated radiation are arranged in a two-dimensional area, and configured to obtain a radiation image based on the signals; a correction unit configured to correct the radiation image using an input/output characteristic of a pixel, which represents a relationship between the dose of radiation on the pixel and the signal output from the pixel and is obtained using gain data based on a plurality of gain images obtained under different doses; and an updating unit configured to update the gain data using an updating coefficient obtained based on the gain data and a gain image newly obtained by the image obtaining unit.

Abstract: An image processing apparatus that processes a radiation image generates a decomposition image representing a planar distribution related to a material, using a plurality of radiation images of an object containing a target object that correspond to different radiation energies, and obtains a target object image related to the target object using a band limitation image corresponding to a frequency band related to a size of the target object, the band limitation image being obtained by performing frequency decomposition on the decomposition image.

Abstract: An imaging control apparatus obtains a plurality of images at different radiation energies, the images having been obtained as a result of irradiating a subject with radiation whose energy changes during one shot, and detecting, a plurality of times, the radiation that has passed through the subject during the one shot; generates an energy subtraction image by performing energy subtraction processing using a plurality of images; and generates a difference image using a plurality of generated energy subtraction images.

Abstract: An electrical steel sheet includes a main surface and an end surface. The electrical steel sheet includes a base material part and an end surface nitrided layer that is provided on the end surface in a manner adjacent to the base material part and that contains nitrogen. The end surface nitrided layer has a surface hardness of 430 HV or more and 1250 HV or less. The end surface contains nitrogen in an amount higher than a nitrogen concentration at the main surface.

Abstract: An imaging control apparatus obtains a plurality of images at different radiation energies, the images having been obtained as a result of irradiating a subject with radiation whose energy changes during one shot, and detecting, a plurality of times, the radiation that has passed through the subject during the one shot; generates an energy subtraction image by performing energy subtraction processing using a plurality of images; and generates a difference image using a plurality of generated energy subtraction images.

Abstract: An image processing apparatus comprises a region specifying unit configured to specify a region composed of one substance from radiation images corresponding to a plurality of energies and obtained by irradiating an object with radiation, a pixel value estimation unit configured to obtain an estimated pixel value of the radiation image based on a thickness or density of a substance in the region, and a scattered ray estimation unit configured to estimate a scattered ray included in the radiation image from a difference between a pixel value of the radiation image and the estimated pixel value.

Abstract: An information processing apparatus comprises: an obtainment unit configured to obtain a radiation image of a subject; a generation unit configured to generate, based on a plurality of radiation images obtained by radiation of mutually different spectra, a material characteristic image in which a region for each material can be extracted from the interior of the subject; and an image processing unit configured to perform processing of enhancing or attenuating, based on a position of a specific region in the material characteristic image, the specific region in the radiation image.

Abstract: An image processing apparatus generates a material characteristic image based on a plurality of radiation images corresponding to a plurality of radiation energies, and estimates at least one of the plurality of radiation energies at a second timing using a plurality of material characteristic images including a material characteristic image generated based on a plurality of radiation images acquired at a first timing and a material characteristic image generated based on a plurality of radiation images acquired at the second timing later than the first timing.

Abstract: An image processing apparatus generates a plurality of attenuation rate images using a plurality of radiation images corresponding to a plurality of different radiation energies obtained by irradiating an object with radiation, corrects the radiation images or the attenuation rate images so as to reduce an error of an attenuation rate caused depending on at least one of a dose of the radiation, a thickness of the object, and energy of the radiation, and generates a material characteristic image by energy subtraction processing using the plurality of attenuation rate images after the correction.

Abstract: An image processing apparatus comprises a planar distribution obtaining configured to, using a plurality of radiation images captured using different radiation energies as input images, obtain an output image representing a planar distribution for a substance contained in the input image, based on a likelihood and a prior probability using one of a pixel value of a pixel of interest or a pixel value of a peripheral pixel as an input, the planar distribution obtaining unit decides the output image such that a probability that an output is a value of the planar distribution when an input is the input image is maximized.