Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires a plurality of projection data based on an output signal from an X-ray detector that rotates around a subject, performs reconstruction filter processing on the plurality of acquired projection data, the reconstruction filter processing being included in reconstruction regarding the plurality of projection data, generates correction information on a sensitivity difference area formed in the plurality of projection data due to differences in sensitivity of the X-ray detector, on the basis of a processing result of the reconstruction filter processing, performs correction processing on the plurality of projection data on the basis of the correction information, and performs reconstruction processing including the reconstruction filter processing on the plurality of projection data subjected to the correction processing.

Abstract: According to one embodiment, an X-ray diagnostic apparatus including processing circuitry. The processing circuitry is configured to cause an X-ray detector to read a signal in a non-destructive readout before termination of X-ray exposure, the signal being accumulated in an X-ray detection element; cause the X-ray detector to read the signal in a destructive readout after termination of X-ray exposure; acquire first projection data generated based on the signal read in the non-destructive readout and acquire second projection data generated based on the signal read in the destructive readout; estimate, based on the second projection data, a saturation region in which saturation is occurring; and replace a signal in the saturation region of the second projection data with a signal in the saturation region of the first projection data.

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured: to perform registration between one contrast image and each of a plurality of mask images; to calculate a plurality of matching degrees between the plurality of mask images and the one contrast image registered with each other, on the basis of the plurality of mask images and the one contrast image registered with each other; and to determine a difference between one of the mask images corresponding to a maximum matching degree among the plurality of matching degrees and the one contrast image, as one subtraction image corresponding to the one contrast image.

Abstract: According to one embodiment, an X-ray diagnosis apparatus includes an X-ray tube, an X-ray detector, an operating unit, and processing circuitry. The processing circuitry determines a focal-spot size of X-rays in second moving picture imaging after first moving picture imaging, based on an output of the X-ray detector in the first moving picture imaging, and determines a focal-spot size of X-rays in third moving picture imaging after the second moving picture imaging, based on an output of the X-ray detector in the second moving picture imaging.

Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry specifies, before position alignment between a first X-ray image and a second X-ray image which is acquired with a device inserted, a device area candidate in the second X-ray image as a candidate of an area where the device appears. The processing circuitry performs the position alignment using first processing of removing the specified device area candidate or second processing of reducing a contribution of the specified device area candidate.

Abstract: An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, and processing circuitry. The X-ray tube exposes X-rays. The X-ray detector detects the X-rays exposed from the X-ray tube. The processing circuitry generates an X-ray image on the basis of a first detection result that is a detection result of the X-rays exposed for an irradiation period. The processing circuitry corrects the X-ray image on the basis of a second detection result that is a detection result of the X-rays until a point before the end of the irradiation period.

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to sequentially obtain X-ray images. The processing circuitry is configured to sequentially generate average images by using the obtained plurality of X-ray images, in parallel to the obtainment of the X-ray images. The processing circuitry is configured to sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.

Abstract: An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, and processing circuitry. The X-ray tube exposes X-rays. The X-ray detector detects the X-rays exposed from the X-ray tube. The processing circuitry generates an X-ray image on the basis of a first detection result that is a detection result of the X-rays exposed for an irradiation period. The processing circuitry corrects the X-ray image on the basis of a second detection result that is a detection result of the X-rays until a point before the end of the irradiation period.

Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry specifies, before position alignment between a first X-ray image and a second X-ray image which is acquired with a device inserted, a device area candidate in the second X-ray image as a candidate of an area where the device appears. The processing circuitry performs the position alignment using first processing of removing the specified device area candidate or second processing of reducing a contribution of the specified device area candidate.

Abstract: According to one embodiment, an X-ray diagnosis apparatus includes an X-ray tube, an X-ray detector, an operating unit, and processing circuitry. The processing circuitry determines a focal-spot size of X-rays in second moving picture imaging after first moving picture imaging, based on an output of the X-ray detector in the first moving picture imaging, and determines a focal-spot size of X-rays in third moving picture imaging after the second moving picture imaging, based on an output of the X-ray detector in the second moving picture imaging.

Abstract: In an X-ray diagnostic apparatus according to an embodiment, an X-ray generator configured to irradiate an X-ray to a subject. An X-ray detector configured to detect the X-ray. Processing circuitry configured to generate a plurality of X-ray images chronologically based on X-rays that have passed through the subject to which a contrast media is injected, and that have been detected by the X-ray detector. The processing circuitry configured to extract a first image from among the X-ray images, the first image when any one of a change in a pixel value between predetermined two images and a predetermined region in one image is equal to or smaller than a threshold. A display configured to display, after the first image is extracted, a plurality of X-ray images that have been generated prior to the first image in reverse chronological order.

Abstract: An image processing apparatus according to an embodiment comprises processing circuitry configured to determine whether each pixel included in a radiation image is equivalent to point-like noise, calculate a degree of similarity between a first pixel and a second pixel that are included in the radiation image, conduct weighted averaging on the first pixel and the second pixel in accordance with the degree of similarity calculated, thereby performing a filtering process on the radiation image, and compare, if it is determined that the first pixel is equivalent to the point-like noise, first neighboring pixels located around the first pixel with second neighboring pixels located around the second pixel without using a comparison result between the first pixel and the second pixel, thereby calculating the degree of similarity.

Abstract: An X-ray diagnosis apparatus according to an embodiment acquires a first X-ray image and a second X-ray image by using mutually-different radiation doses; acquires a third X-ray image based on X-rays radiated onto a region of interest of the subject and onto a region other than the region of interest in mutually-different radiation doses; obtains position information of the region of interest; and on a basis of the position information, generates a subtraction image by calculating a difference between the region of interest in the third X-ray image and a region corresponding to the region of interest in the first X-ray image and calculating a difference between the region other than the region of interest in the third X-ray image and a region corresponding to the region other than the region of interest in the second X-ray image.

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to sequentially obtain X-ray images. The processing circuitry is configured to sequentially generate average images by using the obtained plurality of X-ray images, in parallel to the obtainment of the X-ray images. The processing circuitry is configured to sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.

Abstract: An X-ray diagnostic apparatus of an embodiment includes an image generator, a detection unit, and an irradiation control unit. The image generator successively generates X-ray images based on X-rays emitted from an X-ray tube and transmitted through a subject. The detection unit detects a position of a predetermined target included in the successively generated X-ray images. The irradiation control unit identifies, based on the detected position of the predetermined target, a region in which the predetermined target can be visualized in the X-ray images, and performs control to reduce an X-ray irradiation dose to a region other than the identified region.

Abstract: An image processing apparatus includes a processor that acquires medical image data and performs noise reduction in at least two of three different directions in the medical image data in a predetermined order.

Abstract: An X-ray diagnosis apparatus according to an embodiment includes an X-ray tube, judging circuitry, and grid controlling circuitry. The X-ray tube is configured to radiate X-rays. The judging circuitry is configured to judge whether a voltage should be applied to a grid of the X-ray tube or not, in accordance with a radiation condition. The grid controlling circuitry is configured to apply the voltage to the grid, if the judging circuitry has determined that the voltage should be applied.

Abstract: According to one embodiment, an image analysis device includes a parameter value acquisition unit, a color allocation unit and a time phase image generation unit. The parameter value acquisition unit acquires a parameter value per pixel, on the basis of time variation of pixel values per pixel corresponding to the same region of an object in image data of a plurality of sequential DSA images. The color allocation unit generates a color map in which a (chromatic) color in accordance with the parameter value is allocated per pixel corresponding to the same region of the object. The time phase image generation unit generates color image data of time phase images respectively corresponding to a plurality of time phases, by reflecting information in accordance with pixel values of the DSA images to each pixel of the color map.

Abstract: An image processing apparatus according to an embodiment comprises processing circuitry configured to determine whether each pixel included in a radiation image is equivalent to point-like noise, calculate a degree of similarity between a first pixel and a second pixel that are included in the radiation image, conduct weighted averaging on the first pixel and the second pixel in accordance with the degree of similarity calculated, thereby performing a filtering process on the radiation image, and compare, if it is determined that the first pixel is equivalent to the point-like noise, first neighboring pixels located around the first pixel with second neighboring pixels located around the second pixel without using a comparison result between the first pixel and the second pixel, thereby calculating the degree of similarity.

Abstract: When a plurality of X-ray images in a time sequence is stored in an image data storing unit (25), a marker coordinate detecting unit (26a) detects coordinates of a stent marker in each X-ray image, and a motion vector calculating unit (26b) calculates, with coordinates of the stent marker detected in a first frame as reference coordinates, a motion vector of the coordinates of the stent marker detected in each X-ray image of a second and subsequent frames with respect to the reference coordinates. Then, a filter application range determining unit (26c) moves and determines an application range of a smoothing filter in each X-ray image based on the motion vector, and the filtered image generating unit (26d) generates a filtered image by performing a process by the smoothing filter between application ranges determined in a process target image and a reference image.