Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, an X-ray detector, and a rotating unit. The first reconstruction processing reconstructs a clinical image based on projection data detected by the X-ray detector. The second reconstruction processing reconstructs a noise image based on noise data. The clinical image is combined with the noise image.

Abstract: A medical image processing apparatus includes a difference calculator, a removal part, a first statistical processing part, and an estimation part. The difference calculator receives a plurality of medical image data with different imaging positions and obtains the difference between the plurality of medical image data, thereby generating difference image data that represents the difference. The removal part removes the region corresponding to a structure from the difference image data. The first statistical processing part obtains the first standard deviation of pixel values of each pixel of the difference image data with the region corresponding to the structure removed. The estimation part estimates the second standard deviation of the medical image data based on the first standard deviation. The medical image processing apparatus can estimate noise level of medical image data.

Abstract: An image processing system according to an embodiment includes a stereoscopic display apparatus, a rendering processor, and a display controller. The stereoscopic display apparatus displays a stereoscopic image enabled for a stereoscopic vision using a plurality of parallax images. The rendering processor generates a plurality of parallax images by applying a rendering process to volume data that is three-dimensional medical image data from a plurality of viewpoint positions having different relative positions with respect to the volume data. The display controller causes the stereoscopic display apparatus to display a graphic image that is an image of a given graphic indicating a depth-direction position of a cursor that is operable by a given input unit in a three-dimensional stereoscopic image space in which a stereoscopic image is displayed, together with the parallax images.

Abstract: According to an embodiment, in a medical image diagnostic apparatus, an accepting unit accepts input of conditions with respect to regions to be photographed and arrangement of the regions. An extracting unit extracts an area of interest of each subject by analyzing medical image data photographed based on the conditions accepted by the accepting unit. Based on the conditions and on the area of interest extracted by the extracting unit, a setting unit sets display conditions of a parallax image group to be displayed on a display unit having a stereoscopic viewing function.

Abstract: An image processing system according to the present embodiment includes a generating unit and a display controlling unit. The generating unit generates a group of different types of parallax image sets that are to three-dimensionally display an object onto the display surface of the displaying unit, from different types of three-dimensional medical image data generated by performing different types of image processing onto imaging data of the object collected by a medical image diagnosis apparatus. The display controlling unit performs control so that display conditions of the group of different types of parallax image sets are switched in accordance with the switching of the viewpoint position around the object displayed on the display surface and that the group of different types of parallax image sets are superimposed and displayed.

Abstract: According to an embodiment, an image processing system includes an accepting unit, an acquisition unit, a measuring unit), and an output unit. The accepting unit accepts the setting of two coordinates in a stereoscopic image of a subject displayed on a stereoscopic image display device. The acquisition unit acquires volume data coordinates that are coordinates corresponding to stereoscopic image coordinates indicating the accepted coordinates. The measuring unit executes a measuring process of measuring the distance between the two coordinates accepted by the accepting unit, based on the volume data coordinates acquired by the acquisition unit. The output unit outputs a result of measurement by the measuring unit.

Abstract: According to one embodiment, an X-ray CT apparatus includes an energy classifying unit, a setting unit, and an image generating unit. The energy classifying unit is configured to classify photons passing through an object into a number of energy bins in accordance with energy of the photons. The setting unit is configured to set an energy level and set an energy width of a plurality of energy bins of the number of energy bins. The image generating unit is configured to generate an extended energy bin image based on information on the photons classified into the plurality of energy bins, the image having the energy level and the energy width of the plurality of energy bins.

Abstract: According to the present embodiment, an image diagnosis apparatus includes a first image taking device that takes an image of a patient placed on a couchtop by using an X-ray emission; a second image taking device that takes images in positions by moving an image taking position of the patient by a predetermined distance at a time, along the body-axis direction; a position estimating unit; and a correction processing unit. The position estimating unit estimates a couchtop position for each of the image taking positions of the second image taking device, based on information about warping of the couchtop of the first image taking device. The correction processing unit uses information about the couchtop positions estimated by the position estimating unit, for performing a position correcting process on the images obtained by the image taking devices.

Abstract: A positron emission computed tomography apparatus according to an embodiment includes a detector, a coincidence counting information generating unit, and a body movement detecting unit. The detector detects annihilation radiation released from a subject. The coincidence counting information generating unit searches for sets of counting information, which counted a pair of annihilation radiations at substantially the same time, from a counting information list that is generated from output signals of the detector; generates a set of coincidence counting information for each retrieved set of counting information; and generates a time series list of coincidence counting information. Based on the time series list of coincidence counting information, the body movement detecting unit detects temporal changes in the body movement of the subject.

Abstract: In an image processing system according to an embodiment, an image processing device in the embodiment includes a receiving unit, a flat image generator, and an output unit. The receiving unit receives setting of a region of interest on parallax images of a subject that are displayed stereoscopically. The flat image generator generates a flat image of a cut surface of the subject that is generated by cutting the subject along a plane corresponding to the region of interest received by the receiving unit based on volume data of the subject stored in a predetermined storage device. The output unit outputs the flat image generated by the flat image generator.

Abstract: A medical image processing apparatus includes a difference calculator, a removal part, a first statistical processing part, and an estimation part. The difference calculator receives a plurality of medical image data with different imaging positions and obtains the difference between the plurality of medical image data, thereby generating difference image data that represents the difference. The removal part removes the region corresponding to a structure from the difference image data. The first statistical processing part obtains the first standard deviation of pixel values of each pixel of the difference image data with the region corresponding to the structure removed. The estimation part estimates the second standard deviation of the medical image data based on the first standard deviation. The medical image processing apparatus can estimate noise level of medical image data.

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray generating unit and an area detector. The reconstruction processing unit reconstructs first and second volume data including an overlap region. The extraction unit extracts first and second slice images from the first and the second volume data respectively. The calculation unit calculates the difference value between a sum of pixel values in the first slice images and the sum of pixel values in the second slice images. The determination unit determines whether the difference value falls within a predetermined range. The combining unit combines the first and second volume data and sets a pixel value in the overlap region to a pixel value of the first volume data, a pixel value of the second volume data, or a value derived from pixel values of the first and second volume data.

Abstract: An X-ray computer tomography apparatus includes an X-ray tube, an X-ray detector, a rotating mechanism, a reconstruction unit which reconstructs multislice or volume image data based on the projection data detected by the X-ray detector, a profile generating unit which generates a CT value profile in the slice direction for each pixel by using image data, a profile portion extraction unit which extracts a profile portion exceeding a predetermined threshold from each of the CT value profiles, a scattered radiation distribution estimation unit which estimates a scattered radiation distribution centered on the profile portion based on the CT value integral and width of the profile portion, and a scattered radiation correction unit which corrects the image data based on the estimated scattered radiation distribution.

Abstract: A control unit performs helical scanning an subject while moving a top along a direction substantially parallel to a body axis. An acquisition unit acquires projection data via an X-ray detector. A projection data extraction unit extracts a projection data set necessary for the reconstruction of image data associated with a predetermined slice position from the projection data. A weighting unit assigns a smaller weight to first projection data of the extracted projection data than a weight assigned to second projection data, the first projection data being acquired outside a predetermined period including a predetermined acquisition time of the projection data at the predetermined slice position, the second projection data being acquired within the predetermined period. A reconstruction processing unit reconstructs image data on the basis of the first projection data and the second projection data to which the weights are assigned.

Abstract: An X-ray computer tomography apparatus includes an X-ray tube, a two-dimensional array type X-ray detector, a rotating mechanism, a pair of collimators, a collimator moving mechanism which separately moves the pair of collimators in a direction almost parallel to a rotation axis, a reconstruction processing unit which reconstructs image data in a reconstruction range, and a collimator control unit. The collimator control unit controls the position of each collimator in accordance with the distance between an X-ray central plane corresponding to a cone angle 0° and an end face of the reconstruction range. The collimator moving mechanism moves each of the pair of collimators in the range from the outermost position corresponding to the maximum cone angle to the innermost position offset from a position corresponding to a cone angle of nearly 0° to the opposite side.

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, an X-ray detector, and a rotating unit. The first reconstruction processing reconstructs a clinical image based on projection data detected by the X-ray detector. The second reconstruction processing reconstructs a noise image based on noise data. The clinical image is combined with the noise image.

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray generating unit and an area detector. The reconstruction processing unit reconstructs first and second volume data including an overlap region. The extraction unit extracts first and second slice images from the first and the second volume data respectively. The calculation unit calculates the difference value between a sum of pixel values in the first slice images and the sum of pixel values in the second slice images. The determination unit determines whether the difference value falls within a predetermined range. The combining unit combines the first and second volume data and sets a pixel value in the overlap region to a pixel value of the first volume data, a pixel value of the second volume data, or a value derived from pixel values of the first and second volume data.

Abstract: According to one embodiment, an apparatus includes a reconstructing unit, a first control unit, a detecting unit, a generating unit, and a second control unit. The first control unit controls the reconstructing unit to reconstruct first images based on projection data collected in first periods. The detecting unit detects second periods which belong to pulsation cycles different from one another and in which an organ to be imaged is in the substantially same form, based on the first images. The generating unit generates data for reconstruction including projection data for the required angle range by combining projection data collected in third periods close to the second periods. The second control unit controls the reconstructing unit to reconstruct a second image based the data for reconstruction.

Abstract: An X-ray computed tomography (CT) apparatus having an X-ray tube emitting an X-ray, a detector detecting X-rays transmitted through a subject to be examined, and a bed on which said subject to be examined is placed, said X-ray CT apparatus reconstructing the image of the subject to be examined from a transmission data obtained by emitting X-rays to the subject to be examined. The X-ray computed tomography (CT) apparatus further having an input part, a scan controlling part, a detecting part, a memory part, a segmentation part, a biological-signal synchronization reconstructing part, a biological-signal asynchronization reconstructing part, and a combining part.

Abstract: Noise originating from the difference between a second dose as an X-ray dose used for simulation and a first dose as an X-ray dose associated with raw data obtained by past imaging operation is calculated. Simulation pure raw data as information associated with a photon count and noise which are predicted to be detected by a plurality of X-ray detection elements when imaging is performed by using X-rays of the second dose is generated on the basis of the calculated noise and the raw data obtained by past imaging operation. A simulation image predicted to be obtained by imaging operation using X-rays of the second dose is generated by using the simulation pure raw data and displayed.