Abstract: A diagnostic x-ray system includes a CT-image projection unit obtains a third perfusive-flow image by projecting a second perfusive-flow image obtained by computed tomography in the same direction as a projection direction in which an X-ray is projected toward a test subject to obtain a first perfusive-flow image. A positioning unit obtains positioning information by performing positioning of the first perfusive-flow image and the third perfusive-flow image. A perfusive-flow index calculation unit calculates a first perfusive-flow index from the first perfusive-flow image, and calculates a second perfusive-flow index from the third perfusive-flow image. A comparative-index calculation unit calculates a comparative index based on the first perfusive-flow index and the second perfusive-flow index, by comparing the first perfusive-flow index with the second perfusive-flow index, based on the positioning information obtained by the positioning unit.

Abstract: According to one embodiment, a medical image diagnosis apparatus includes a volume rendering image generation part, mask image-storage, real time fluoroscopic image generation part, subtraction image generation part, coil image generation part, and image composition part. The volume rendering image generation part generates, from volume data, a volume rendering image representing blood vessel information. The mask image-storage stores fluoroscopic mask images. The real time fluoroscopic image generation part acquires real time fluoroscopic images for each chronological sequence accompanying device insertion. The subtraction image generation part generates a subtraction image by subtraction processing on the fluoroscopic mask image stored in the mask image storage and the real time fluoroscopic image acquired for each chronological sequence. The coil image generation part generates a coil image from the fluoroscopic mask image.

Abstract: A system according to one embodiment includes a memory, an aneurysm identification device, a distortion-degree evaluation device, and a rupture risk derivation device. The memory stores medical image data. The aneurysm identification device identifies an aneurysm in the medical image data. The distortion-degree evaluation device quantitatively evaluates a distortion degree of the aneurysm. The rupture risk derivation device derives a rupture risk of the aneurysm from a result of the evaluation.

Abstract: According to one embodiment, an X-ray diagnostic apparatus includes an X-ray tube, first detector, second detector, arm, sliding mechanism, tilting mechanism, and control unit. The X-ray tube includes an anode to generate X-rays upon receiving electrons. The first detector has the first pixel size. The second detector has the second pixel size smaller than the first pixel size. The arm pivotally supports the X-ray tube, first detector, and second detector. The sliding mechanism slidably supports the first and second detectors so as to irradiate one of the first and second detectors with the X-rays generated by the X-ray tube. The tilting mechanism tiltably supports the X-ray tube to change the size of an effective X-ray focal spot on the anode. The control unit controls the sliding of the first and second detectors by the sliding mechanism upon interlocking with the tilting of the X-ray tube by the tilting mechanism.

Abstract: An embodiment of the present invention provides a medical apparatus which displays an image of an object collected by using a first radiography system and a second radiography system, including: an image processing unit adapted to acquire a three-dimensional image; a projection direction input unit used to input a projection direction for at least one of the first radiography system and the second radiography system using the three-dimensional image; an imaging direction setting unit adapted to set an imaging direction for at least one of the first radiography system and the second radiography system based on the projection direction; and an interference checking unit adapted to determine whether interference between the first radiography system and the second radiography system will occur if one of the first radiography system and the second radiography system corresponding to the set imaging direction is moved.

Abstract: A medical image processing apparatus is configured as follows.

Abstract: Noise assessment is important to image quality evaluation as well as image processing. For example, the noise level estimation is used as criteria for terminating an iterative noise reduction process. To determine a meaningful noise level, the pixels in featureless regions are separated from the rest of the image. A new concept of pseudo-standard deviation (PSD) is introduced to automatically determine simple and reliable noise level estimates. Furthermore, a histogram of PSD is constructed with fine bins to calculate the moving average of the histogram. The first peak in filtered histogram gives the most representative noise measure as a desired approximation of true standard deviation.

Abstract: A medical bed apparatus of an embodiment includes: a tiltable top board on which to place an examinee; a photographic mechanism configured to radiograph the examinee; an operation unit which is provided to a lateral side of the top board, and through which at least one of the top board and the photographic mechanism is operated by an operator; and a horizontally-holding mechanism configured to hold the operation unit horizontally when the top board tilts.

Abstract: In a medical image processing apparatus according to an embodiment, an image inverting unit generates a first inverted image obtained by inverting a first medical image in a left-and-right direction of an examined subject and generates a second inverted image obtained by inverting a second medical image that is different from the first medical image in the left-and-right direction of the examined subject. A displacement detecting unit detects a displacement between the first medical image and the first inverted image. A registration unit generates, based on the displacement detected by the displacement detecting unit, a corrected image obtained by correcting the second medical image or a corrected inverted image obtained by correcting the second inverted image. A difference image generating unit generates a difference image between the second inverted image and the corrected image or a difference image between the second medical image and the corrected inverted image.

Abstract: In an X-ray imaging apparatus according to an embodiment, a three-dimensional blood-vessel image collecting unit collects a three-dimensional blood vessel image. An X-ray image collecting unit collects an X-ray image. A composite-image creating unit then creates a three-dimensional projection image projected based on a state of the X-ray imaging apparatus from the collected three-dimensional blood vessel image, and creates a composite image of the created three-dimensional projection image and the X-ray image. A displacement determining unit then determines a displacement between an aneurysm on the three-dimensional projection image and the aneurysm on the X-ray image. Subsequently, a registration unit registers the composite image by using the determined displacement, and displays the registered composite image onto a display unit.

Abstract: An X-ray image diagnostic apparatus includes an X-ray imager, an image data generator, a position information acquisition mechanism, a position information corrector, and a display. The X-ray imager generates projection data by X-ray imaging in first and second imaging modes for a patient. The image data generator generates reference image data based on projection data in the first imaging mode and image data for positional deviation correction based on projection data in the second imaging mode. The position information acquisition mechanism acquires position information of a treatment device inserted into the patient. The position information corrector corrects the position information of the treatment device based on the position information of the treatment device and treatment device information of the image data for positional deviation correction, collected by X-ray imaging in the second imaging mode. The display displays the reference image data to which the corrected position information is added.

Abstract: A contrast medium injection management apparatus includes a measuring unit which repeatedly measures the injection amount of contrast medium injected from at least one contrast medium injection device into a subject to be examined, a cumulative injection amount calculating unit which repeatedly calculates a cumulative injection amount at the start of examination or after an arbitrary point of time from the injection amount, and a display unit which displays the cumulative injection amount.

Abstract: An image diagnostic apparatus includes a radiography unit which generates a mask image and contrast images before and after the injection of a contrast medium, an image memory which stores the mask image and the contrast images, an ROI identifying unit which sets a region of interest from the mask image and the contrast images, a pixel shift amount detecting unit which detects a pixel shift amount between the mask and the contrast image upon localization to the region of interest, and a processing unit which shifts at least the mask image or the contrast image in accordance with the detected pixel shift amount and performs subtraction between the images.

Abstract: According to one embodiment, an X-ray diagnosis apparatus comprises a C-arm, a support mechanism rotatably supporting the C-arm, a rotation driving unit driving rotation of the C-shaped arm, an X-ray tube mounted on the C-arm, an X-ray detector mounted on the C-arm, a control unit controlling the X-ray tube and the X-ray detector, a storage unit storing two-dimensional images generated, a first reconstruction processing unit reconstructing first three-dimensional images respectively corresponding to a plurality of cardiac phases based on acquired two-dimensional images, a positional shift amount calculation unit calculating positional shift amounts respectively corresponding to cardiac phases based on the first three-dimensional images, and a second reconstruction processing unit reconstructing a single second three-dimensional image with a reduced positional shift based on the plurality of acquired two-dimensional images by using the calculated positional shift amounts.

Abstract: In a medical image processing apparatus according to an embodiment, an image inverting unit generates a first inverted image obtained by inverting a first medical image in a left-and-right direction of an examined subject and generates a second inverted image obtained by inverting a second medical image that is different from the first medical image in the left-and-right direction of the examined subject. A displacement detecting unit detects a displacement between the first medical image and the first inverted image. A registration unit generates, based on the displacement detected by the displacement detecting unit, a corrected image obtained by correcting the second medical image or a corrected inverted image obtained by correcting the second inverted image. A difference image generating unit generates a difference image between the second inverted image and the corrected image or a difference image between the second medical image and the corrected inverted image.

Abstract: A first generating unit generates a plurality of blood vessel image data sets at the plurality of imaging angles by performing subtraction processing for the plurality of mask image data sets and the plurality of contrast image data sets. A second generating unit generates a blood vessel volume data set including an artery region, a vein region, and a capillary vessel region by performing reconstruction processing for the plurality of blood vessel image data sets. A third generating unit generates a capillary vessel volume data set associated with the capillary vessel region by removing the artery region and the vein region from the blood vessel volume data set. A fourth generating unit generates a capillary vessel image data set by performing three-dimensional image processing for the capillary vessel volume data set.

Abstract: According to one embodiment, an X-ray diagnostic apparatus includes a data acquiring unit and a data processing unit. The data acquiring unit acquires X-ray projection data corresponding to plural directions from an object in which a stent having markers has been inserted by exposing X-rays to the object from the plural directions. The data processing unit obtains a spatial position corresponding to at least one marker out of the markers based on first three dimensional image data generated by first image reconstruction processing of the X-ray projection data to generate second three dimensional image data by second image reconstruction processing of the X-ray projection data with a correction using a shift amount obtained based on the X-ray projection data and projected data of the one marker on a projected plane of the X-ray projection data.

Abstract: According to one embodiment, a medical image diagnosis apparatus includes a volume rendering image generation part, mask image-storage, real time fluoroscopic image generation part, subtraction image generation part, coil image generation part, and image composition part. The volume rendering image generation part generates, from volume data, a volume rendering image representing blood vessel information. The mask image-storage stores fluoroscopic mask images. The real time fluoroscopic image generation part acquires real time fluoroscopic images for each chronological sequence accompanying device insertion. The subtraction image generation part generates a subtraction image by subtraction processing on the fluoroscopic mask image stored in the mask image storage and the real time fluoroscopic image acquired for each chronological sequence. The coil image generation part generates a coil image from the fluoroscopic mask image.

Abstract: A medical image processing apparatus according to an embodiment includes: an imaging unit configured to image an affected area in two directions using X-rays; a fluoroscopic image generating unit configured to generate two X-ray fluoroscopic images corresponding to the two directions, on a basis of imaging signals outputted from the imaging unit; a rendering image generating unit configured to project the affected area contained in three-dimensional image data acquired in advance, in two directions according to a same X-ray geometry as that used for imaging the X-ray fluoroscopic images, to thereby generate two affected area rendering images; and an image combining unit configured to combine the X-ray fluoroscopic images with the affected area rendering images for each corresponding direction, to thereby generate combined parallax images in two parallax directions corresponding to the two directions, and to output the two generated combined parallax images to a 3D display apparatus.

Abstract: An X-ray diagnosis apparatus includes a display-image creating unit that creates a display image from three-dimensional medical image data such that a display image of three-dimensional medical image data substantially matches up with an anatomical structure on an acquired image by the X-ray diagnosis apparatus. Moreover, the X-ray diagnosis apparatus includes a display-image changing unit that changes a display image so as to maintain consistency of an anatomical structure in accordance with change in acquiring conditions by the X-ray diagnosis apparatus. Furthermore, the X-ray diagnosis apparatus includes a display unit that displays a display image that is at least one of created and changed by at least one of the display-image creating unit and the display-image changing unit.