Abstract: To provide a technique of obtaining information for discriminating two substances included in a radiation image of a subject without performing imaging by changing radiation energy, a radiation imaging system includes a detector including a plurality of pixels which obtain pixel values corresponding to incident radiation transmitted through a subject, and an information processing unit configured to perform a process of estimating information on thicknesses and densities of substances included in the subject by performing a calculation using pixel values of an arbitrary one of the plurality of pixels and an average value of energy of radiation quanta of the arbitrary pixel calculated in accordance with the pixel values of the arbitrary pixel.

Abstract: An image processing apparatus obtains a three-dimensional radiation image of a right region of substantially symmetrical regions, obtains a three-dimensional radiation image of a left region of the substantially symmetrical regions, performs alignment between the three-dimensional radiation image of the right region and the three-dimensional radiation image of the left region based on a feature position of the regions, and substantially symmetrically arranges and displays the three-dimensional radiation image of the right region and the three-dimensional radiation image of the left region which have been aligned.

Abstract: A tomography apparatus for readily imaging an object while reducing radiation exposure doses includes a filter that adjusts distribution of a radiation dose transmitted therethrough from a radiation source, a radiation detection unit that detects a radiation dose transmitted through the filter and through an object, a holder that holds the object, an acquisition unit that acquires information about the holder, and a control unit that controls the distribution of the transmitted radiation does according to the information about the holder acquired by the acquisition unit.

Abstract: An image reconstructing apparatus creates a reconstructed image for every calculation operation by performing predetermined repetitive calculation by iterative reconstruction for a plurality of images obtained by acquiring an object from different angles, extracts at least one reconstructed image under a predetermined condition from the created reconstructed images, displays on a display unit information corresponding to the extracted reconstructed images and information corresponding to the extracted reconstructed image, selects at least one reconstructed image in accordance with an instruction of an operator on the display unit, and outputs the selected reconstructed image.

Abstract: An image processing apparatus obtains a three-dimensional radiation image of a right region of substantially symmetrical regions, obtains a three-dimensional radiation image of a left region of the substantially symmetrical regions, performs alignment between the three-dimensional radiation image of the right region and the three-dimensional radiation image of the left region based on a feature position of the regions, and substantially symmetrically arranges and displays the three-dimensional radiation image of the right region and the three-dimensional radiation image of the left region which have been aligned.

Abstract: The present invention includes amount-of-change specifying means that specifies, among a plurality of pieces of image data generated by detection means in accordance with a detection result of radiated rays that have passed through a subject, the amount of change in a relative position of the subject with respect to the detection means during a period from a generation timing of immediately preceding image data, which is generated immediately before target image data, to a generation timing of the target image data, amount-of-radiated-rays setting means that sets the amount of radiated rays with which irradiation means performs irradiation in accordance with the amount of change, composition ratio determination means that determines a composition ratio in accordance with the amount of change, and noise reduction means that reduces noise of the target image data by combining, in accordance with the composition ratio, image data generated before the target image data with the target image data.

Abstract: An image processing apparatus generates a reconstructed image based on a plurality of images. The image processing apparatus includes: an image input unit configured to input the plurality of images; a calculation count setting unit configured to set a calculation count in accordance with an application purpose of the reconstructed image; and a reconstruction processing unit configured to generate the reconstructed image by performing reconstruction calculation on the plurality of images repeatedly based on the calculation count.

Abstract: An image reconstructing apparatus creates a reconstructed image for every calculation operation by performing predetermined repetitive calculation by iterative reconstruction for a plurality of images obtained by acquiring an object from different angles, extracts at least one reconstructed image under a predetermined condition from the created reconstructed images, displays on a display unit information corresponding to the extracted reconstructed images and information corresponding to the extracted reconstructed image, selects at least one reconstructed image in accordance with an instruction of an operator on the display unit, and outputs the selected reconstructed image.

Abstract: A histogram of pixel values in a difference image between a post-injection X-ray image and composite image is generated. A histogram of pixel values in a difference image between a pre-injection X-ray image and the composite image is generated. From the difference between the histograms, information on pixel values in a region where a radiopaque dye is imaged in the difference image between the post-injection X-ray image and composite image is collected. Pixel values in the difference image between the post-injection X-ray image and composite image are converted by using the collected information, and the converted difference image is output.

Abstract: A tomography apparatus for readily imaging an object while reducing radiation exposure doses includes a filter that adjusts distribution of a radiation dose transmitted therethrough from a radiation source, a radiation detection unit that detects a radiation dose transmitted through the filter and through an object, a holder that holds the object, an acquisition unit that acquires information about the holder, and a control unit that controls the distribution of the transmitted radiation does according to the information about the holder acquired by the acquisition unit.

Abstract: An image processing apparatus includes an image acquisition unit configured to acquire a plurality of partial images obtained by shooting each of a plurality of shooting ranges which a shooting region of an object are divided into, a feature amount acquisition unit configured to acquire a feature amount of at least one of the partial images, a characteristic acquisition unit configured to acquire a gradation conversion processing characteristic based on the feature amount and the shooting region, and a conversion unit configured to convert, based on the processing characteristic, a gradation of an image of the shooting region of the object obtained by joining the partial images.

Abstract: An image processing apparatus includes an image acquisition unit configured to acquire a pixel value range for each of a plurality of partial images captured for a plurality of partial imaging ranges which an imaging region of a subject is divided into, an offset value acquisition unit configured to acquire a value indicating pixel value distribution of an overlapping area in each of the plurality of partial images, a correction value acquisition unit configured to calculate for each partial image a shift amount for minimizing a difference between the values indicating pixel value distribution of the overlapping areas, and setting each of the pixel value range within a predetermined range, and a correction unit configured to shift pixel values by the shift amount for each partial image.

Abstract: An image analysis apparatus includes a moving image input unit which accepts an input of a moving image of a subject irradiated with X-rays, a determination unit which analyzes the previous frame and current frame of the moving image, and determines based on the analysis result whether or not any of a change in relative position between an exposure field of the X-rays and an observation portion of the subject, a change in imaging condition of the moving image, and a change in observation portion of the subject is detected, and a feature amount setting unit which sets feature amounts extracted from the current frame in the current frame when the determination unit determines that any of the changes is detected, and sets feature amounts set in the previous frame in the current frame when the determination unit determines that no change is detected.

Abstract: A histogram of pixel values in a difference image between a post-injection X-ray image and composite image is generated. A histogram of pixel values in a difference image between a pre-injection X-ray image and the composite image is generated. From the difference between the histograms, information on pixel values in a region where a radiopaque dye is imaged in the difference image between the post-injection X-ray image and composite image is collected. Pixel values in the difference image between the post-injection X-ray image and composite image are converted by using the collected information, and the converted difference image is output.

Abstract: An image analysis apparatus includes a moving image input unit which accepts an input of a moving image of a subject irradiated with X-rays, a determination unit which analyzes the previous frame and current frame of the moving image, and determines based on the analysis result whether or not any of a change in relative position between an exposure field of the X-rays and an observation portion of the subject, a change in imaging condition of the moving image, and a change in observation portion of the subject is detected, and a feature amount setting unit which sets feature amounts extracted from the current frame in the current frame when the determination unit determines that any of the changes is detected, and sets feature amounts set in the previous frame in the current frame when the determination unit determines that no change is detected.

Abstract: An image analysis apparatus includes a moving image input unit which accepts an input of a moving image of a subject irradiated with X-rays, a determination unit which analyzes the previous frame and current frame of the moving image, and determines based on the analysis result whether or not any of a change in relative position between an exposure field of the X-rays and an observation portion of the subject, a change in imaging condition of the moving image, and a change in observation portion of the subject is detected, and a feature amount setting unit which sets feature amounts extracted from the current frame in the current frame when the determination unit determines that any of the changes is detected, and sets feature amounts set in the previous frame in the current frame when the determination unit determines that no change is detected.

Abstract: The image densities of images formed with a plurality of laser beams on the basis of image data are measured. The quantity of each of the plurality of laser beams is adjusted in accordance with the measurement result.

Abstract: An image processing apparatus includes an image acquisition unit configured to acquire a pixel value range for each of a plurality of partial images captured for a plurality of partial imaging ranges which an imaging region of a subject is divided into, an offset value acquisition unit configured to acquire a value indicating pixel value distribution of an overlapping area in each of the plurality of partial images, a correction value acquisition unit configured to calculate for each partial image a shift amount for minimizing a difference between the values indicating pixel value distribution of the overlapping areas, and setting each of the pixel value range within a predetermined range, and a correction unit configured to shift pixel values by the shift amount for each partial image.

Abstract: An image processing apparatus includes an image acquisition unit configured to acquire a plurality of partial images obtained by shooting each of a plurality of shooting ranges which a shooting region of an object are divided into, a feature amount acquisition unit configured to acquire a feature amount of at least one of the partial images, a characteristic acquisition unit configured to acquire a gradation conversion processing characteristic based on the feature amount and the shooting region, and a conversion unit configured to convert, based on the processing characteristic, a gradation of an image of the shooting region of the object obtained by joining the partial images.

Abstract: An image processing apparatus includes an emitter which has a plurality of light emitting devices arranged in a sub-scan direction, and a former which forms an image on a photosensitive member by multi-passed scanning an identical region on the photosensitive member in a main scan direction using light beams output from the respective light emitting devices of the emitter. An input section inputs image data of an image to be formed by the image processing apparatus. A divider divides the input image data into image data for respective scans in the multi-passed scans using a mask pattern generated based on amounts of deviations from scan lines of the light beams output by the respective light emitting devices of the emitter. A supplier supplies the divided image data to the emitter in accordance with scans of the former.