Abstract: A radiation conversion panel includes a first pixel group from which electric charges are read after a first energy-level image capturing cycle and after a second energy-level image capturing cycle, and a second pixel group from which electric charges are read after the second energy-level image capturing cycle, wherein pixels of the first pixel group and pixels of the second pixel group are arranged alternately.

Abstract: In a radiographic image detection apparatus that can perform long-size radiography on a region of a patient that is larger than the detection range of a radiographic image detector, inclination of a radiographic image is corrected at high speed. The inclination angle of the radiographic image detector at each position Z within the movement range of the radiographic image detector is stored in a yawing table. When the inclination of the radiographic image is corrected, the inclination angle of the radiographic image detector is extracted from the yawing table based on the position at which each of the radiographic images is obtained, and the inclination angle of the radiographic image is corrected.

Abstract: An X-ray machine for monitoring thermal treatment of human tissue produces a reference exposure of the tissue to be treated prior to commencement of the treatment. Thermal treatment is performed subsequently. Check exposures are made with the X-ray machine during the treatment or also during treatment intervals. The check exposures are performed as partial volume exposures at a lower radiation load than the reference exposures. From a comparison of check exposures with the reference exposures, conclusions can be drawn concerning changes of tissue temperature and also tissue properties.

Abstract: An image of a physical object is produced by receiving a plurality of raw images, dividing the plurality of raw images into a first subset of primary images and a second subset of secondary images according to a predetermined criterion. From the first subset of primary images an intermediate image is determined while from the second subset of secondary images a mask image is determined. Afterwards a registration of the intermediate image and the mask image is performed by using direct registration of predetermined features present in the intermediate image and the mask image. A fused image of the physical object is generated out of the mask image and the intermediate image.

Abstract: The dual energy X-ray CT apparatus automatically optimizes a map for separation to achieve a high degree of separation accuracy and a reduction of dose. An X-ray attenuation coefficient acquired in the dual energy X-ray CT system is applied to a map for separation which represents a relationship between the X-ray attenuation coefficient and a composition of an object, thereby separating the composition of the object. The map formation unit for separation calculates an existing probability of each composition for each combination of multiple types of X-ray attenuation coefficients, and determines the composition having the largest existing probability as the composition corresponding to the combination of the X-ray attenuation coefficients, thereby forming the map for separation. This configuration allows a formation of the map for separation with respect to each imaging condition, and high degree of accuracy in separating composition can be achieved.

Abstract: A method and a device are disclosed for generating a CT image with a high time resolution using a computed tomography scanner which has at least two recording systems which are operated at different X-ray energy spectra. In at least one embodiment of the process, CT images are firstly reconstructed in each case from a semi-rotation with the two recording systems, with irradiated lengths of the contrast agent-enriched structures and the soft tissue being calculated therefrom. Subsequently, a common X-ray energy is assumed and artificial measurement data records are calculated therefor, using the knowledge of the irradiated lengths for both recording systems at the same common X-ray energy. The artificial measurement data of respectively a quarter-rotation per recording system is then used to calculate the final CT image with a high time resolution. The method affords the use of dual-energy scans without losing the high time resolution available in dual-source systems.

Abstract: An image processing apparatus and an image processing method. The image processing apparatus includes an image obtaining unit to obtain a plurality of X-ray images using a plurality of X-rays corresponding to each of a plurality of energy bands being different from each other, a first processing unit to generate a plurality of material images using the plurality of X-ray images, and a second processing unit to generate a high contrast X-ray image using at least one of the plurality of material images.

Abstract: An apparatus for obtaining a long length x-ray image of a subject has a first x-ray detector, a second x-ray detector, and an x-ray source having an exposure directing apparatus that is actuable to direct exposure from the x-ray source towards at least a first imaging position during a first interval and a second imaging position during a second interval, with an overlap along a boundary between the at least first and second imaging positions. An x-ray detector holder has a detector translation apparatus that is actuable to translate at least one of the first and second x-ray detectors to an interim position for one of the first and second intervals and to either the first or the second imaging position for the other of the first and second intervals. A host controller is programmed to provide instructions for movement of the x-ray detector holder and exposure directing apparatus.

Abstract: A method for enhanced visualization of objects in interventional angiographic examinations is provided. X-ray images are recorded during the system dose regulation phase with pure anatomy and during the filling phase with the vessels filled with contrast agent. A mask image is produced from both of the images. Native X-ray images are produced during a working or intervention phase with an object, for example a wire, a catheter or a “coil”, moved in the vessel. The images have a matrix-shaped array of pixels. The pure anatomy images are subtracted from the filling images and from the native images for generating a first subtraction image and a second subtraction image respectively. The first and the second subtraction image are processed for generating a vessel image and an object image respectively. The vessel image and the object image are processed for generating a roadmap image which is played back on a monitor.

Abstract: A volumetric image of a space is acquired from an imaging system. The space includes an object of interest and another object, and the volumetric image includes data representing the object of interest and the other object. A two-dimensional radiograph of the space is acquired from the imaging system. The two-dimensional radiograph of the space includes data representing the object of interest and the other object. The two-dimensional radiograph and the volumetric image are compared at the imaging system. A two-dimensional image is generated based on the comparison. The generated two-dimensional image includes the object of interest and excludes the other object.

Abstract: A radiation imaging system includes a radiation sensor unit and a main control unit. The radiation sensor unit includes, a radiation sensor that detects the radiation image based on the radiation ray that passes through the object, a sensor characteristics correction unit that performs sensor characteristics correction on the radiation image based on image reception characteristics of the radiation sensor, an image analysis unit that analyzes the radiation image in which the sensor characteristics correction has been performed by the sensor characteristics correction unit and calculates an analysis parameter, and a transmission unit that transmits the analysis parameter as a gradation conversion parameter and the radiation image which has been subjected to the sensor characteristics correction to the main control unit.

Abstract: A method for generating an image of an object using a scanning system includes performing a first portion of a scan in a first scanning mode to acquire a first dataset, receiving a halt command for a conveyor within the scanning system, decelerating the conveyor to a halt based on the halt command using a conveyor controller, and, when the object is present within an examination region after the conveyor has halted, performing a second portion of the scan in a second scanning mode to acquire a second dataset. The second scanning mode is different than the first scanning mode. The method also includes reconstructing the first dataset using a first reconstruction algorithm and reconstructing the second dataset using a second reconstruction algorithm. The second reconstruction algorithm is different than the first reconstruction algorithm. The image is generated using the first reconstructed dataset and the second reconstructed dataset.

Abstract: A radiographic imaging system comprises: a radiation source for irradiating an examinee with radiation; a radiation detector for detecting radiation that has penetrated the examinee to acquire radiographic image data; image data receiving unit for receiving the radiographic image data from the radiation detector and outputting a termination signal indicating that an image has been taken each time receiving the radiographic image data; control unit for controlling operations of the radiation source and the radiation detector and detecting a progress of an imaging session for successively taking a series of images according to the termination signal outputted from the image data receiving unit; and progress notification unit for notifying the examinee of a progress of imaging session detected by the control unit.

Abstract: A radiographing apparatus according to an aspect of the present invention is characterized in that an image processing device comprises an acquisition device which acquires projection data of a first energy spectrum and projection data of a second energy spectrum, and a synthetic image generating device which synthesizes a first image on the basis of the projection data of the first energy spectrum, and a second image on the basis of the projection data of the second energy spectrum according to a predetermined synthetic condition, and generating a synthetic image, and a display device displays the generated synthetic image.

Abstract: For the purpose of providing an X-ray tomographic imaging apparatus for displaying a dual-energy image to facilitate diagnosis by an operator, an X-ray tomographic imaging apparatus (10) comprises: an image comparison information calculating section (24) for calculating image comparison information between said first-energy projection dataset(LD) or first-energy tomographic image(LT) and said second-energy projection dataset(HD) or second-energy tomographic image(HT); a region-of-interest defining section (23) for defining a region of interest; a weighting factor determining section (25-2) for determining a weighting factor for use in weighted subtraction processing between said first-energy projection dataset or first-energy tomographic image and said second-energy projection dataset or second-energy tomographic image, such that said image comparison information in said region of interest can be substantially eliminated by conducting said weighted subtraction processing; and a dual-energy image reconstructin

Abstract: Imaging apparatus comprises a radiation source arranged to generate a divergent imaging beam and an associated radiation detector mounted on a C-arm which can rotate. A first drive is arranged to move the radiation source and the detector relative to a subject in a scanning direction to generate output signals from the detector, thereby performing a scan generating image data containing distortion in a direction transverse to the scanning direction. A second drive is arranged to rotate the C-arm, to change the orientation of the radiation source in a direction transverse to the scanning direction incrementally between repeated scans, thereby to generate a plurality of sets of image data.

Abstract: An X-ray CT apparatus includes an X-ray radiation unit which applies a first X-ray having a first energy spectrum and a second X-ray having a second energy spectrum different from the first energy spectrum to a subject, an X-ray data acquisition unit which acquires first X-ray projection data of the subject based on the first X-ray and second X-ray projection data of the subject based on the second X-ray, and an image reconstruction unit which determines information about a difference between the first X-ray and the second X-ray with respect to an image of the subject, segments the image into at least two pixel areas based on the difference information, and sets part of the segmented pixel areas to a dual energy image obtained by a weighted subtraction process based on X-ray projection data having a plurality of energy spectrums.

Abstract: The invention relates to a method and a device for the separate three-dimensional representation of arteries and/or veins in a vascular system of the body by means of a C-arm biplanar system having two C-arms, which can each record a sequence of x-ray images from different projection angles during a mask or filler pass. With the filler pass, both C-arms record x-ray images, so that the x-ray images of the filler pass can be combined to form a first data record, which contains x-ray images from the arterial phase of the vascular contrasting and/or to form a second data record, which contains x-ray images from the venous phase of the vascular contrasting. This enables the arterial and venous phases to be reconstructed separately.

Abstract: A method of forming an offset-corrected exposure image includes obtaining an initial exposure image and exposure metadata related to the initial exposure image. An intermediate offset-corrected exposure image is formed by obtaining one or more dark images associated with the initial exposure image and subtracting an averaged value of the one or more dark images from the initial exposure image. The offset-corrected exposure image is obtained by combining an offset adjustment map with the intermediate offset-corrected exposure image.

Abstract: According to one embodiment, a calibration system for calibrating image data produced by an imaging system is provided. The calibration system includes a processor configured for: receiving the image data from the imaging system; receiving a plurality of reference values from the imaging system; and calibrating the image data using the reference values. The reference values correspond to air image data produced by the imaging system.

Abstract: The present invention is directed towards processing security images of people subjected to X-ray radiation. The present invention processes a generated image by dividing the generated image into at least two regions or mask images, separately processing the at least two regions of the image, and viewing the resultant processed region images either alone or as a combined image.

Abstract: A method for the correction of lag charges in a flat-panel X-ray detector makes it possible, for each integration phase of the detector, to determine an initial read phase situated just before said integration phase. The method of the invention enables the measurement, for each integration phase, of the charges present in the detector at the corresponding initial read phase, the production of a lag image from the latent charges measured in the initial read phase and the subtraction of the lag image from the raw image. The use of the measurement of charges enables the direct correction of the lag image in the acquisition without the use of a correction module as in the prior art.

Abstract: A radiographic apparatus according to this invention, when carrying out recursive computation, pixel groups consisting of detection pixels respectively corresponding to positions on a radiation detection device are sorted into locations subjected to the recursive computation and locations exempted from the recursive computation. For the locations subjected to the recursive computation, lag-behind parts are removed by the recursive computation to obtain corrected radiation detection signals. The recursive computation is not carried out at least for the locations exempted from the recursive computation. The lag-behind parts can be removed from the radiation detection signals, with a calculation amount for the recursive computation reduced by an amount corresponding to the recursive computation excluded.

Abstract: The invention provides a real-time method for navigation inside a region of interest, for use in a radiography unit including an X-ray source with an X-ray detector facing the source (cradle), and a support (table) on which an object to be radiographied, containing the region of interest, can be positioned.

Abstract: The present invention provides methods and apparatus in a ray tracing image processing system to reduce the amount of information passed between processing elements. According to embodiments of the invention, in response to a ray-primitive intersection, a first processing element in the image processing system may generate a portion of secondary rays and a second processing element may generate a second portion of secondary rays. The first processing element may generate reflected and refracted rays and the second processing element may generate shadow rays. The first processing element may send a ray-primitive intersection point to the second processing element so that the second processing element may generate the shadow rays. By only sending the intersection point to the second processing element, in contrast to sending a plurality of shadow rays, the amount of information communicated between the two processing elements may be reduced.

Abstract: A method and apparatus for multi-energy object inspection using a brilliant x-ray source. A first mono-energetic x-ray image of an object at a first selected energy is generated. A second mono-energetic x-ray image of the object at a second selected energy is generated. The first selected energy is different than the second selected energy. Additional mono-energetic x-ray images may be generated at energies different than previous energies up to n selected energies. The mono-energetic x-ray images are mathematically combined and processed to form a result. The result of processing the mono-energetic x-ray images is presented. The result comprises processed mono-energetic x-ray image data describing materials in the object with greater sensitivity, identifying the layers, and identifying the material composition than in the first image or the second image.

Abstract: The x-ray tube is energized (12) and the myocardium is imaged (16) while contrast agent is infused to the coronary arteries of the subject (14). Single photon counting data acquired with the detector while two thresholds are set to form simultaneously low energy images and high energy images (16). The images are processed (18) and displayed (20).

Abstract: The invention relates to an X-ray diagnostic imaging system for generating images in digital subtraction angiography and a method carried out therewith, comprising the following steps: accessing a mask image frame of a patient under examination; accessing a series of live image frames of the patient under examination acquired in the same imaging position of the mask frame acquisition, wherein one of the mask image frame and the live image frames is contrast-enhanced; assuming possible shift vectors in a region of interest and calculating a scoring thereof, each possible shift vector being a difference vector between the mask image frame and a respective live image frame, determining the possible shift vector with the highest scoring and choosing it as an elected shift vector, calculating a likelihood p representing a quality value of the elected shift vector, shifting the mask image frame with respect to the respective live image frame by a modified shift vector depending on the likelihood p, subtracting t

Abstract: An X-ray diagnostic apparatus comprises an X-ray image generating unit which generates a series of a plurality of X-ray images associated with a subject to be examined, a storage unit which stores data of a three-dimensional image associated with the subject, an image processing unit which generates data of a two-dimensional blood vessel image from the stored data of the three-dimensional image, a difference processing unit which generates a plurality of difference images by subtracting the X-ray images from each other, and a display unit which superimposes and displays each of the plurality of difference images and the two-dimensional blood vessel image.

Abstract: A method of performing a computed tomographic image reconstruction is provided. The method provides for performing a short scan of an imaging object to acquire a short scan data, performing a plurality of image reconstructions based on the short scan data wherein the plurality of image reconstructions result in a corresponding plurality of image volumes wherein the image reconstructions use different view weighting functions, filtering the plurality of image volumes such that when the volumes are added together, the frequency domain data is substantially uniformly weighted. Further, the method provides for combining the plurality of image volumes together to produce a final image volume.

Abstract: An entire area of an FPD on which an alignment marker provided in a screen is projected is set in advance as a fixed overlapping area (Ctop to Cbottom) according to the long length imaging area and/or the X-ray source position. When determining a plurality of field-of-view area areas for dividing an imaging area for long length imaging into a plurality of areas and taking images, the field-of-view areas (FOVNT to FOVNB) and the FPD positions PN corresponding to the respective field-of-view areas are determined so that adjacent field-of-view areas overlap each other at the set fixed overlapping area. The X-ray source height, the X-ray irradiation direction, the collimator aperture angle and the FPD position are controlled so as to apply an X-ray only to each of the determined field-of-view areas.

Abstract: In an x-ray system and a method for image composition, congruent optical images and x-ray images of subjects provided with markers are generated. A transformation matrix/imaging matrix is formed and applied to the congruent x-ray images based on the detected identical markers in optical images. The transformation matrix is used to compose an aggregate image from the x-ray images.

Abstract: A memory stores first image data for offset correction generated by performing an interlace scanning of the driving lines of odd rows only in a driving circuit unit. A memory stores second image data for offset correction generated by performing the interlace scanning of the driving lines of even rows only in the driving circuit unit. A processing unit synthesizes the first image data for offset correction and the second image data for offset correction, thereby to generate image data for offset correction of one frame portion, and an arithmetic operation unit performs an arithmetic operation processing on the radiation image data by using the image data for offset correction of one frame portion synthesized and generated, thereby to perform the offset correction of the radiation image data.

Abstract: A system and method of a diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged, a detector that receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source and attenuated by the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to obtain CT scan data with two or more incident energy spectra, decompose the obtained CT scan data into projection CT data of two or more basis materials, reconstruct linearly weighted projections of the two or more basis materials, determine an optimized energy for the two or more basis materials within a region-of-interest (ROI), and form a monochromatic image of the projection CT data at the optimized energy using the two or more basis material projections.

Abstract: X rays are emitted without injecting an angiographic contrast material, and a non-injection image acquiring device 7 acquires a non-injection image in the angiographic contrast material non-injection state. X rays are emitted after injecting the angiographic contrast material, and an injection image acquiring device 8 acquires an injection image in the angiographic contrast material injection state. A blood vessel locus image acquiring device 9 superimposes the non-injection image and injection image acquired, and processes image data of a DSA image obtained in each of the non-injection state and injection state of the angiographic contrast material to acquire a blood vessel locus image. An image processing device 10 carries out a black-and-white reversal of the blood vessel locus image acquired, and the blood vessel is displayed in white. Beam hardening filters are inserted, and X-ray fluoroscopic radiography is carried out while inserting a guide wire W into the blood vessel.

Abstract: The invention relates to a method, to an X-ray apparatus for performing the method and to a detector arrangement intended for the latter, for producing X-ray images containing a reduced proportion of scattered radiation. The X-ray radiation is detected in this case by a detector arrangement comprising two X-ray detectors, there being provided in the first X-ray detector openings through which the second X-ray detector is able to detect scattered radiation and primary radiation by separate detector elements. The signals given by the second X-ray detector are used to determine the proportion of scattered radiation that is contained in the image produced by the first X-ray detector and to largely free the first image of the proportion of scattered radiation.

Abstract: A method for reducing noise in a computed tomographic (CT) image includes acquiring both a first set of projection views and a second set of projection views, wherein for each projection view in the first set of projection views there is an associated projection view in the second set of projection views representing the same object scanned at substantially the same time from substantially the same position. The method further includes reconstructing the first set of projection views and the associated second set of projection views to obtain a first image and a second image, respectively. Next, the first image and the second image are combined to obtain a noise map and an amount of noise in a product image is estimated utilizing the noise map. The method also includes filtering using the noise map to perform noise reduction.

Abstract: An X-ray generation unit and an X-ray detection unit are controlled by an imaging control unit when two-dimensional images of a sample without a contrast and two-dimensional images of a sample with a contrast are imaged, so as to set imaging angles of these two-dimensional images to be different from each other, and a three-dimensional image of the sample is acquired by an image calculation unit on the basis a plurality of two-dimensional images without a contrast and a plurality of two-dimensional images with a contrast which are acquired under the control of the X-ray generation unit and the X-ray detection unit.

Abstract: A cardiac cavity region specifying part specifies the position of a cardiac cavity region represented in volume data. An image generation plane determining part determines an image generation plane that includes a rotation axis intersecting the cardiac cavity region. With a direction orthogonal to the image generation plane as a view direction, a first image generator generates three-dimensional image data that three-dimensionally represents a region excluding the cardiac cavity region, based on data excluding data included in the cardiac cavity of the volume data. A second image generator generates two-dimensional image data that two-dimensionally represents a region in the image generation plane, based on the data excluding the data included in the cardiac cavity region of the volume data. An image synthesizer synthesizes the three-dimensional image data with the two-dimensional image data. A display controller causes a display to display the synthesized image.

Abstract: A radiographic imaging system comprises: offset correction unit for performing offset correction on a radiographic image acquired by a radiation detector using a offset correction data in a storage, dark image acquisition unit for acquiring a dark image with the radiation detector at a given timing in the absence of radiation emitted from a radiation source, residual image judgment unit for judging whether or not dark image acquired by the dark image acquisition unit contains a residual image resulting from an immediately preceding irradiation, offset correction data renewal unit for producing offset correction data based upon the dark image and storing the offset correction data in the storage for renewal when the residual image judgment unit judges the dark image to contain no residual image, and producing no offset correction data when the residual image judgment unit judges the dark image to contain a residual image.

Abstract: A method and an arrangement for an intelligent adaptive x-ray imaging system, in which the exposure conditions of the object to x-rays is dynamically controlled and optimized in real-time in order to provide the optimum diagnostic information. The arrangement splits the imaging beam into two separate fan beams that scan over the object in a single pass, where the first beam (scout) collects information from the object, that is analyzed to control the intensity or spectral quality or spatial distribution of the second beam (I-ImaS). The CMOS image sensors deployed in the arrangement are able to process detected information either on-chip or within a field programmable gate array, so as to compute a measure related to the diagnostic value of the information.

Abstract: An X-ray computer tomography apparatus includes a cone beam X-ray tube X-rays, a two-dimensional array type X-ray detector, a rotating mechanism which supports the X-ray tube, together with the X-ray detector, so as to be rotatable around the object, a reconstruction processing unit which reconstructs a full scan image based on projection data, of the projection data, which corresponds to a view count corresponding to one rotation and also reconstructs a short scan image based on projection data corresponding to a view count smaller than the view count corresponding to one rotation, a CT value shift distribution generating unit which generates a spatial distribution of CT value shifts originating from the smaller view count based on the full scan image and the short scan image, and a correcting unit which corrects the short scan image based on the spatial distribution of the CT value shifts.

Abstract: The invention relates to a method for the production of angiography recordings. First, a mask image is recorded with a first modality. A contrast medium is injected after the first recording. A control image is recorded with a second modality after the injection of the contrast medium. A spreading of the contrast medium is determined based on the images and the control of subsequent recordings is analyzed. A recording criterion is checked to determine whether the recording criterion has been achieved. If it has not been achieved, the control image is repeatedly recorded for repeatedly determining the spreading of the contrast medium. If it has been achieved, a contrast image is recorded with the first modality and the mask image and the contrast image are processed and analyzed.

Abstract: This invention provides novel cadmium tungstate scintillator materials that show improved radiation hardness. In particular, it was discovered that doping of cadmium tungstate (CdWO4) with trivalent metal ions or monovalent metal ions is particularly effective in improving radiation hardness of the scintillator material.

Abstract: Positioning images are created by a projection-image creating unit before imaging, and the positioning images are grouped and stored by a projection-image storage unit for each preset. When imaging is started, a positioning-information calculating unit calculates positioning parameters using the positioning images stored in the projection-image storage unit. An analysis-image-for-synthesis creating unit creates an analysis image using the positioning parameters, and an analysis-image synthesizing and displaying unit synthesizes the analysis image with a live image and displays a synthesized image. When an imaging direction of an X-ray angiography apparatus is changed, a positioning-information updating unit directly updates the positioning parameters based on an amount of change of the imaging direction.

Abstract: The present invention provides an X-ray CT apparatus for imaging an MD image having a better S/N. The X-ray CT apparatus for taking an image with one of two materials within a subject to be examined being fractionated, acquiring two sets of data corresponding to said two types of X-ray having different energy by scanning using said two types of X-ray, generating a first image based on the two sets of data with the pixel values made by weighted addition of two types of CT values corresponding to the two types of X-ray, generating a second image based on the two sets of data, wherein the other one of the two types of material being fractionated, and generating an image by weighted subtraction of the first image and the second image.

Abstract: A radiographic imaging system comprises: a grid located opposite a surface of a radiographic image data detector to remove scatter radiation occurring when a radiation penetrates the subject; a grid moving mechanism for moving the grid at least in a direction; control means for acquiring first radiographic image data with the radiographic image data detector in a preset imaging time while moving the grid with the gird moving mechanism; and anomaly detection means for calculating a displacement of a grid image in the first radiographic image data based upon a position in which the grid is located and a displacement of the grid effected by the grid moving mechanism during the preset imaging time and detecting a defect in the first radiographic image data having a length agreeing with the calculated displacement of the grid image.

Abstract: A method is disclosed for generating cardiac CT representations of a beating heart of a patient with the aid of a multi-tube CT system with application of a contrast medium. In at least one embodiment, the method includes carrying out a first CT scan with the multi-tube CT system, wherein at least one tube generates an X-ray spectrum, and reconstructing at least one CT representation of the same cardiac phase with a first temporal resolution; subsequently carrying out a second CT scan with the multi-tube CT system, wherein at least two angularly offset tubes generate different X-ray spectra; reconstructing at least one CT representation of the same cardiac phase per X-ray spectrum with a second temporal resolution; and generating a combined CT representation from results of the first and of the second scan.

Abstract: An X-ray diagnostic system is provided, which uses X-rays to image the lower limb of an object under conditions suitable for a flow of an X-ray contrast agent injected into the object. In the system, a C-shaped arm supports both an X-ray tube and an X-ray detector so that an object-laid tabletop is located between both the tube and the detector. For instance, one of the tabletop and the C-shaped arm is relatively moved with respect to the other so that the object is imaged along a body-axis direction thereof. The apparatus is able to perform a fluoroscopic scan to obtain a body-axis directional fluoroscopic image of the agent-injected object and to set imaging parameters, region by region in the body-axis direction, necessary for an imaging scan using the fluoroscopic image. The imaging parameters are used for the imaging scan of the agent-injected object.

Abstract: Imaging apparatus comprises a radiation source arranged to generate a divergent imaging beam and an associated radiation detector mounted on a C-arm which can rotate. A first drive is arranged to move the radiation source and the detector relative to a subject in a scanning direction to generate output signals from the detector, thereby performing a scan generating image data containing distortion in a direction transverse to the scanning direction. A second drive is arranged to rotate the C-arm, to change the orientation of the radiation source in a direction transverse to the scanning direction incrementally between repeated scans, thereby to generate a plurality of sets of image data.