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: 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: A radiation imaging apparatus includes: a processing unit configured to obtain a plurality of images corresponding to a plurality of different radiation energies by irradiating an object with radiation and performing imaging using an energy spectrum obtained by totaling energy information obtained by dividing a time-serially obtained radiation photon energy in a time direction, and perform energy subtraction processing using the plurality of images.

Abstract: An information processing apparatus obtains a plurality of results by performing energy subtraction processing for each of a plurality of sets which are sets each formed from a plurality of radiation images corresponding to different radiation energies and in which combinations of radiation energies are different, and determines a value of a predetermined parameter used in the energy subtraction processing such that a dispersion between the plurality of results is reduced.

Abstract: An image processing apparatus includes: a processing unit configured to perform noise reduction processing and material decomposition processing using a plurality of images corresponding to a plurality of different radiation energies obtained by irradiating an object with radiation and performing imaging. The processing unit generates a noise reduction image by applying filter processing for each frequency component obtained by resolving a thickness image of a material obtained by the material decomposition processing into a plurality of frequencies, and generates an image by material re-decomposition processing using the thickness image after noise reduction, which is obtained by combining the noise reduction images for each frequency component and an accumulation image obtained based on combining of the plurality of images.

Abstract: An image processing apparatus comprises an acquisition unit for acquiring low-energy information and high-energy information from a plurality of images that are obtained by emitting radiation toward an object, a calculation unit for calculating an effective atomic number and a surface density from the low-energy information and the high-energy information, and a generation unit for generating an image that includes color information based on the effective atomic number and the surface density.

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: An image processing apparatus includes: a generation unit configured to generate a first image representing a thickness of a first material and a second image representing a thickness of a second material different from the first material using a plurality of images obtained based on a first combination of different radiation energies, and to generate a third image representing the thickness of the first material and a fourth image representing the thickness of the second material using a plurality of images obtained based on a second combination of different radiation energies; and an obtaining unit configured to obtain, using one of the first image and the second image and one of the third image and the fourth image, an enhanced image in which a third material different from the first material and the second material is enhanced.

Abstract: A radiation imaging apparatus that obtains a radiation image by an energy subtraction method. Each pixel includes a conversion element that converts radiation into an electrical signal and a reset portion that resets the conversion element. Each pixel performs an operation of outputting a first signal corresponding to an electrical signal generated by the conversion element in a first period, and an operation of outputting a second signal corresponding to an electrical signal generated by the conversion element in the first period and a second period. Radiation having first energy is emitted in the first period, and radiation having second energy is emitted in the second period. In each pixel, the reset portion does not reset the conversion element during a period that includes the first period and the second period.

Abstract: An image processing apparatus comprises a processing unit configured to performing energy subtraction processing using information concerning a plurality of attenuation rates corresponding to a plurality of radiation energies that are different from each other and are obtained by performing imaging in which an object is irradiated with radiation. The processing unit estimates attenuation information of a decomposition target material contained in the object using at least one image obtained by the energy subtraction processing, and generates an image concerning the decomposition target material using the attenuation information and the information concerning the plurality of attenuation rates.

Abstract: A radiation imaging apparatus including: a first scintillator layer configured to convert a radiation (R) which has entered the first scintillator layer into light; a second scintillator layer configured to convert a radiation transmitted through the first scintillator layer into light; a fiber optic plate (FOP) provided between the first scintillator layer and the second scintillator layer; and an imaging portion configured to convert the light generated in the first scintillator layer and the light generated in the second scintillator layer into an electric signal.

Abstract: A radiation imaging apparatus, comprising a sensor array in which a plurality of sensor units are arranged and a driving unit for driving the sensor array, wherein each sensor unit includes u detection element for detecting radiation and a sampling unit configured to be able to sample a signal from the detection element, the sampling unit is connected to a signal line configured to propagate a signal from the detection element, the driving unit uses the sampling unit to perform a first sampling driving operation and a second sampling driving operation to sample the signal propagating through the signal line, and the driving unit starts the second sampling driving operation before the completion of the first sampling driving operation and completes the second sampling driving operation after the completion of the first sampling driving operation.

Abstract: An image processing apparatus performs first noise reduction processing on a plurality of radiation images corresponding to mutually-different radiation energies, generates a decomposition image by energy subtraction processing using the plurality of radiation images obtained by performing the first noise reduction processing, and performs second noise reduction processing on the decomposition image, wherein the second noise reduction processing uses a filter that differs from a filter used in the first noise reduction processing in at least one of size and type.

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 filtering unit for performing recursive filtering on a first signal component and a second signal component that are obtained by emitting radiation at a plurality of levels of energy toward an object, and a generation unit for generating a moving image based on the first signal component and the second signal component on which the recursive filtering is performed. A filter coefficient of the recursive filtering performed on the first signal component and a filter coefficient of the recursive filtering performed on the second signal component differ from each other.

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: A radiation imaging apparatus is provided. The apparatus includes an imaging unit including pixels and a control unit. Each of the pixels includes a conversion unit and a sample/hold circuit. The control unit causes the imaging unit to perform first imaging and second imaging after the first imaging to generate one energy subtraction image, and controls a timing of causing the sample/hold circuit in the first imaging to sample a first image signal obtained by the first imaging and a timing of causing the sample/hold circuit in the second imaging to sample a second image signal obtained by the second imaging in accordance with radiation irradiation conditions set in advance so as to reduce a difference between an amount of noise contained in the first image signal and an amount of noise contained in the second image signal.

Abstract: An image processing apparatus comprises a generating unit configured to generate, using a plurality of radiation images corresponding to mutually different radiation energies, a first material decomposition image that indicates a thickness of a first material and a second material decomposition image that indicates a thickness of a second material that differs from the first material. The generating unit generates, using the first material decomposition image and the second material decomposition image, a thickness image in which the thickness of the first material and the thickness of the second material are added together.

Abstract: A radiation imaging apparatus includes an imaging unit having a plurality of pixels. Each of the plurality of pixels includes a conversion element configured to convert radiation into an electrical signal, a processing circuit configured to process the electrical signal output from the conversion element, and a holding unit configured to sample and hold the electrical signal output from the processing circuit. After radiation irradiation from a radiation source is started and before next radiation irradiation from the radiation source is started, the holding unit samples and holds, at a first timing and a second timing which is after the first timing, the electrical signal output from the processing circuit. A gain of the processing circuit at the first timing and the gain of the processing circuit at the second timing are different from each other.

Abstract: A radiation imaging apparatus includes an imaging unit having a pixel array of pixels, and a signal processing unit for processing a signal from the imaging unit. Each pixel includes a conversion element for converting radiation into electrical signal and a reset unit for resetting the conversion element, the signal processing unit generates radiation image based on first image corresponding to electrical signal converted by the conversion unit of each pixel in a first period, and second image corresponding to electrical signal converted by the conversion element of each pixel in a second period which starts after start of the first period and ends before end of the first period, and in each pixel, the conversion element is not reset by the reset unit in the first period.