Abstract: An image providing method performed by a computing apparatus includes acquiring a first image group including at least a portion of a series of images generated for continuous volumes with a first slice thickness belonging to a subject, providing, as a current viewing image, one image of the first image group or one image of a second image group including images generated for continuous volumes with a second slice thickness belonging to the subject, and in response to a first specific input of an input device, repeatedly updating an image provided as the current viewing image with an individual image provided for a subsequent viewing based on a directivity given for the first specific input and, in response to a second specific input of the input device, switching the current viewing image between an image of the first image group and an image of the second image group.

Abstract: The present invention is directed to systems and methods for generating virtually averaged optical coherence tomography (Oct.) images. An illustrative method can include receiving an image, identifying a first voxel of the image, and selecting a plurality of local voxels of the image. Each of the plurality of local voxels is within a defined region of the first voxel. The values of the plurality of local voxels can indicate an appearance of the local voxels in the image.

Abstract: A cabinet X-ray image system for obtaining X-ray images and colorized or grey scale density X-ray images of a specimen includes a sampling chamber for containing the specimen, a display, an X-ray system including, an X-ray source, a photon counting X-ray detector, and a specimen platform, and a controller configured to selectively energize the X-ray source, control the photon counting X-ray detector to collect a projection X-ray image of the specimen when the X-ray source is energized, determine the density of different areas of the specimen from data collected from the photon counting X-ray detector of the projection X-ray image, create a density X-ray image of the specimen wherein different areas of the specimen are indicated as a density or range of densities based on the determined density of different areas of the specimen, and selectively display the density X-ray image of the specimen on the display.

Abstract: A method for 3D image reconstruction includes the steps of radiating an X-ray source at a predetermined angle to a photographing subject and acquiring a plurality of two-dimensional image images received through a detector, generating an image population by scaling the obtained plurality of two-dimensional image images, generating a virtual image using a pixel average between two-dimensional images from the plurality of scale-corrected two-dimensional images, and adding the virtual image to the image population, repeatedly generating a virtual image using a pixel average between two-dimensional images included in the image population until a two-dimensional image larger than a predetermined number P is generated in the image population, and generating a 3D video image using the generated 2D video image.

Abstract: A x-ray micro tomography system provides the ability to proscriptively determine regularization parameters for iterative reconstruction of a sample, from projection data of the sample. This allows a less experienced operator to determine the regularization parameters with adequate precision.

Abstract: An X-ray transmission inspection apparatus includes an X-ray source for irradiating a sample with X-rays, a two-dimensional sensor for detecting transmission X-rays passing through the sample, a sample moving mechanism for moving the sample, a calculation unit for processing an image of the transmission X-rays detected by the two-dimensional sensor, and a display unit for displaying a cross-sectional image. When V1 is a speed at which the sample moves, F is a frame rate of the two-dimensional sensor, A is a sample pitch of the two-dimensional sensor, and LS is a distance between the X-ray source and the two-dimensional sensor, the calculation unit creates a cross-sectional image taken at a distance L from the X-ray source by adding the images of the pixels positioned at an interval of [(LS×V2)/(L×F×A)] in a direction in which the sample moves.

Abstract: The present disclosure relates to the field of a cabinet X-ray incorporating an X-ray tube, an X-ray detector, and a real-time camera, either high definition or standard resolution, for the production of organic and non-organic images and a system and method wherein the attained X-ray radiograph may be colorized to designate different densities. In particular, the disclosure relates to a system and method with corresponding apparatus for capturing a real-time image simultaneously with the X-ray image allowing a cabinet X-ray unit to attain and optimize images either in grayscale or colorized with exact orientation of the 2 images and display the resultant images overlaid/blended upon each other and then saved and transmitted in various formats, i.e. .jpeg., .tiff, DICOM, etc.

Abstract: A method for determining whether a pixel of a computer-rendered image is a firefly includes: dividing a plurality of samples originating from the pixel, into first and second subsets; identifying whether the pixel is an outlier based on variance data of the first subset; identifying whether the pixel is an outlier based on variance data of the second subset. The pixel is determined as not a firefly in response to both the pixel being identified as an outlier based on the variance data of the first subset, and the pixel being identified as an outlier based on the variance data of the second subset. The pixel is determined as a firefly in response to the pixel being not identified as an outlier based on the variance data of the first (second) subset and being identified as an outlier based on the variance data of the second (first) subset.

Abstract: A flatness detection method is provided for detecting component tilt regardless of measurement conditions. The flatness detection method is based on data of an electronic component captured by a 3D camera and is realized by acquiring position information and height information of a plurality of reference points of the electronic component, creating a virtual plane based on the position and the height information of at least three of the plurality of reference points, determining, based on the height information that takes, as a reference, the virtual plane of the reference points excluding selected points from the reference points, whether the virtual plane is a valid plane or an invalid plane, and detecting flatness of the component by taking the valid plane as a reference.

Abstract: Disclosed is an X-ray image display apparatus with improved depth resolution, the display apparatus including a storage storing a plurality of X-ray frame data about a subject, an image processor reconstructing a first X-ray image by using a first group of X-ray frame data constituted by at least a portion of the plurality of X-ray frame data and reconstructing a second X-ray image by using a second group of X-ray frame data constituted by at least a portion of the plurality of X-ray frame data, a display configured to provide a screen, and a viewer module displaying a background image display part and a partial image display part disposed at a portion of the background image display part on the screen, displaying the first X-ray image on the background image display part, and displaying a portion of the second X-ray image corresponding to the first X-ray image on the partial image display part.

Abstract: A method and system for obtaining images of an object of interest using a system comprising an X-ray source facing a detector. The method and system enable the acquiring of a plurality of 2D projection images of the object of interest in a plurality of orientations. A selected 2D projection image such as the zero projection of the plurality of projections can be enhanced by using at least a subset of the plurality of tomosynthesis projection images. The obtained enhanced 2D projection image is displayed for review.

Abstract: A radiation image capturing system includes the following. A radiation irradiating apparatus irradiates the radiation image capturing apparatus according to control by a generator. A control device transmits an external synchronizing signal to the radiation image capturing apparatus, transmits an irradiating request signal to the generator, and synchronizes the radiation image capturing apparatus with the radiation irradiating apparatus. When the external synchronizing signal is received, the radiation image capturing apparatus switches the control mode. After the control mode is switched, the radiation image capturing apparatus starts a readout process of the image data at a timing delayed a predetermined amount of time from a timing that the external synchronizing signal is received. The control device transmits the irradiating request signal to the generator at a timing delayed a predetermined amount of time from a timing that the irradiating request signal should be transmitted to the generator.

Abstract: This X-ray apparatus for measuring a substance quantity includes: an X-ray irradiating unit for irradiating X-rays from above or below a container which contains a substance to be measured; an imaging unit which is disposed so as to face the X-ray irradiating unit with the container between the imaging unit and the X-ray irradiating unit, and which obtains image data on the basis of the transmitted X-rays passing through the container; and a substance quantity calculating unit which processes the obtained image data and calculates the quantity of the substance to be measured, on the basis of the intensity of the transmitted X-rays for each pixel in the container.

Abstract: In a method and magnetic resonance (MR) apparatus for recording calibration data for establishing convolution kernels for GRAPPA algorithms for reconstruction of image data from measurement data recorded using echo planar imaging with simultaneous recording of a number of slices of a slice stack. A slice GRAPPA algorithm is used to reconstruct the image data of the individual slices and an inplane GRAPPA algorithm is used to reconstruct undersampled magnetic resonance data within the slices.

Abstract: A tomographic image generation device includes a projection image acquisition section configured to acquire plural projection images obtained by radiating radiation onto a breast in sequence from plural radiation angles and by performing imaging at each of the plural radiation angles; a mammary gland density acquisition section configured to acquire a mammary gland density of the breast; a derivation section configured to derive a slice thickness that decreases as the mammary gland density acquired by the mammary gland density acquisition section increases; and a generation section configured to generate a tomographic image at the slice thickness derived by the derivation section based on the plural projection images acquired by the projection image acquisition section.

Abstract: A derivation unit acquires imaging conditions corresponding to order information received by a receiving unit based on a table stored in a storage unit and sets the imaging conditions in a radiation source control unit. The radiation source control unit controls a radiation source based on the set imaging conditions such that a radiographic image is captured. An acquisition unit acquires the actual values of the imaging conditions from the radiation source control unit. The derivation unit derives virtual grid characteristics based on the actual values of the imaging conditions. An execution unit acquires a captured radiographic image through a detector control unit. The execution unit performs a virtual grid process for the acquired radiographic image based on the virtual grid characteristics derived by the derivation unit and the acquired imaging conditions to generate a radiographic image from which the influence of scattered radiation has been removed.

Abstract: A radiographic system may be configured to capture a first radiograph containing a first image of an object with the source and the receiver in a first orientation with respect to one another. The system may store the first radiograph and metadata representing vertical and horizontal positions of the first orientation. At least one of the source and the receiver may be moved so that the source and the receiver are in a second orientation with respect to one another. A second radiograph containing a second image of the object may be captured with the source and the receiver in the second orientation. The second radiograph may be stored in memory along with metadata representing vertical and horizontal positions of the second orientation. Based on the captured radiographs, a magnification of the object of interest, as represented by the first image or the second image, may be determined.

Abstract: An image processing device to reduce noise in a medical image includes first and second generators, a detector, and a corrector. A first image is generated based on data corresponding to photons with a first energy from among data that is obtained based on an energy of radiation that has passed through a subject and a second image is generated based on data corresponding to photons with a second energy. The detector finds, in the second image, a second block having a similar pattern of pixel values to a first block included in the second image. The corrector reduces noise by correcting pixel values of a third block in the first image corresponding to the first block based on new pixel values of the third block that are calculated by using pixel values included in a fourth block in the first image.

Abstract: A phase correlation method (PCM) can be used for translational and/or rotational alignment of 3D medical images even in the presence of non-rigid deformations between first and second images of a registered volume of a patient.

Abstract: An imaging system is provided that includes a gantry, a plurality of image detectors, an x-ray source, an adjustable source collimator, and at least one processor. The image detectors are radially spaced around a circumference of the bore such that gaps exist between adjacent image detectors. The x-ray source transmits x-rays across the bore towards at least two of the image detectors. The adjustable source collimator is interposed between the x-ray source and a center of the bore, and is configured to block a portion of the x-rays produced by the x-ray source The at least one processor is configured to control the adjustable source collimator to dynamically adjust a range of x-rays that are blocked by the adjustable source collimator along the fan angle during transmission of x-rays from the x-ray source and acquisition of computed tomography (CT) information.

Abstract: A method for processing and communicating breast tissue image data includes obtaining image data of a patient's breast tissue, processing the image data to form a first subset thereof, transmitting the first subset of the image data to a user computer, receiving a user request from the user computer based on the one or more lower resolution images, processing the image data to form a second subset thereof, and transmitting the second subset of the image data to the user computer. The second subset of the obtained image data is responsive to the user request. The first and second subsets of obtained image data are sufficient to generate one or more respective lower and higher resolution images of respective portions of the patient's breast tissue.

Abstract: A method for image acquisition includes selectively concealing and exposing an x-ray source to a target object while the x-ray source travels along a first path, virtually moving an x-ray detector along a second path in a first direction while the x-ray source is exposed to the target object, and virtually moving the x-ray detector along the second path in a second direction generally opposite the first direction while the x-ray source is concealed from the target object.

Abstract: Systems and methods for reducing X-ray scatter during breast imaging, and more specifically during tomosynthesis imaging. In one embodiment, an anti-scatter grid having a plurality of septa may be configured to be positioned relative to an X-ray imaging device such that each septum of the plurality of septa extends along a direction substantially parallel to a coronal plane of a subject during imaging of the subject using the X-ray imaging device. The X-ray imaging device may be operable in a tomosynthesis mode for imaging of a breast of the subject and may include the anti-scatter grid disposed between a breast platform and the X-ray detector. The anti-scatter grid may be configured to move in a direction substantially parallel to a sagittal plane of the subject during tomosynthesis imaging.

Abstract: A radiography system includes an imaging controller, a reconstruction processor, a process sequence controller and a display section. The imaging controller controls a radiation source to move in a range of a designated sweep angle and project X-rays at different angles to an imaging subject, while controlling a flat panel detector to acquire a set of projection images. The reconstruction processor uses the set of projection images to produce a plurality of tomographic images for use in diagnosis. The process sequence controller determines a parameter for sorting the plurality of tomographic images into first and second groups according to the sweep angle of the radiation source so as the first group of tomographic images to be produced prior to the second group of tomographic images. The display section displays at least the first group of tomographic images.

Abstract: An input device includes an input unit on which an operator performs a predetermined operation to perform input, a storage unit that stores a reference range set on a virtual coordinate, a control unit that identifies the operation of the operator based on a trajectory of the operation performed on the input unit by the operator and the reference range, a determination unit that determines whether the trajectory of the operation of the operator exceeds the reference range, and a range setting unit that updates the reference range based on a determination result of the determination unit.

Abstract: Disclosed is a computer-implemented method of creating an image of a specimen including receiving a first image of a first section of a specimen created using a first wavelength of invisible light a second image of a second section of the specimen adjacent to the first section and the second image created using the first wavelength of invisible light, co-registering the first image and the second image and creating, by the processor, a single-plane image of the first section using a next-image process.

Abstract: An inspection system includes an irradiation source, an image detector, and a placement device. The placement device comprises a carrier and a rotation mechanism. With respect to connections, the placement device is configured to be disposed between the irradiation source and the image detector, and the rotation mechanism is configured to be connected to the carrier. With respect to operations, the irradiation source and the image detector are driven to be moved along a predetermined path, the carrier is configured to carry at least one object, and the rotation mechanism is configured to rotate the carrier.

Abstract: A method includes modulating a flux of emission radiation between a first lower flux level and a second higher flux level in coordination with a cardiac cycle signal so that the flux is at the first lower flux level during a first cardiac motion phase having a first higher cardiac motion and is at the second higher flux level during a second cardiac motion phase having a second lower cardiac motion. The method further includes reconstructing the projection data with a first reconstruction window, which applies a first higher weight to a first sub-set of the projection data that corresponds to the first cardiac motion phase and the lower first flux level and a second lower weight to a second sub-set of the projection data that corresponds to the second cardiac motion phase and the higher second flux level, to generate first volumetric image data.

Abstract: The invention provides x-ray-based breast imaging systems and related methods that are, for example, applicable to contrast enhanced digital mammography and contrast enhanced digital breast tomosynthesis and allow fast, cost-effective and accurate x-ray imaging.

Abstract: Apparatus includes an X-ray source 10, a wavelength dispersive X-ray detector for measuring X-ray fluorescence (XRF) and an energy dispersive X-ray detector 14 again for measuring X-ray fluorescence. Selected elements are measured using the wavelength dispersive process to reduce the overall measurement time compared with using only one of the two detectors or compared to a simple approach of measuring low atomic number elements with the wavelength dispersive detector and high atomic number elements with the energy dispersive detector. The selection can take place dynamically, in particular on the basis of the results of the energy-dispersive detector.

Abstract: Some embodiments are associated with generation of a volumetric image representing an imaged object associated with a patient. According to some embodiments, tomosynthesis projection data may be acquired. A computer processor may then automatically generate the volumetric image based on the acquired tomosynthesis projection data. Moreover, distances between voxels in the volumetric image may be spatially varied.

Abstract: A radiation imaging device includes plural individual detectors defining an irregular rectangular active area responsive to x-rays and with different widths along a length of the active area. The individual detectors may be of different rectangular shapes and mounted on a motherboard. The motherboard may be formed of a first module mounting a first of two individual detectors and a second module detachable connected to the first module and mounting a second of two individual detectors.

Abstract: A radiation image capturing system includes a first image capturing apparatus for capturing a radiation image of a subject, a second image capturing apparatus for capturing a radiation image of the subject, the second image capturing apparatus having a specification different from that of the first image capturing apparatus, an image correcting device for correcting the radiation image of the subject which is captured by the second image capturing apparatus such that the radiation image of the subject which is captured by the second image capturing apparatus has the same magnification as that of the radiation image of the subject which is captured by the first image capturing apparatus, and a display unit for displaying the corrected radiation image. The radiation images captured by the image capturing apparatus of different specifications are corrected to have the same magnification.

Abstract: A configuration and an associated operating method for tomosynthetic fluoroscopy utilize an x-ray emitter and with an x-ray detector. The configuration further contains a mounting device, which is rotatably mounted about a rotational axis and about which the x-ray emitter is arranged such that the optical axis of the x-ray emitter is directed to the x-ray detector and that, in the case of a rotation of the mounting device, the focus of the x-ray emitter describes a circular path. An advantage offered by the invention lies in ensuring robust tomosynthetic fluoroscopy.

Abstract: A method and system for producing tomosynthesis images of a breast specimen in a cabinet x-ray system. An X-ray source delivers X-rays through a specimen of excised tissue and forms an image at a digital X-ray detector. Multiple X-ray images are taken as the X-ray source moves relative to the stationary breast specimen. In the preferred embodiment, the X-ray source moves in a range from about 350° to and including about 10°. The source may travel substantially along a path that generally defines an arc, or linearly, while the detector remains stationary throughout and the source remains substantially equidistant from the specimen platform. The set of X-ray image data taken at the different points are combined to form a tomosynthesis image that can be viewed in different formats, alone or as an adjunct to conventional specimen radiography.

Abstract: There is provided an image processing apparatus including a processing unit configured to superimpose a plurality of X-ray images that are based on X-ray detection data representing detection results obtained by detecting a plurality of times in a time-division manner parallel beam X-rays output from a ray source including a plurality of X-ray sources that output parallel beam X-rays.

Abstract: A computed tomography system, capable of tomosynthesis, includes an inner circular gantry and an outer gantry within a housing assembly. A plurality of spaced apart radiology imaging plates are located along the inner gantry and adapted as x-ray detectors. An x-ray source is secured to the outer gantry and adapted to shoot x-rays between the spaced apart detectors and onto the patient or object while being rotated along the gantry and relative to the patient. A radiography device is moveably coupled to the inner gantry and adapted to scan and read the radiology plates and provide the data to an image processing computer. The x-ray source coupled to the outer gantry moves relative to the imaging plates such that a large number of projections can be exposed and thereafter scanned by the integral radiology device.

Abstract: A method of acquiring scatter data and image projection data in computed tomography is provided that includes attenuating a radiation source using a pattern of blockers arranged to provide blocked and unblocked regions of the radiation source, and acquiring image data and scatter data of a target using an imaging device. A scatter map in the projection image can be estimated by interpolation and/or extrapolation of the projection image using an appropriately programmed computer, subtracting the estimated scatter map from the projection image to obtain scatter-corrected projections, reconstructing a CBCT volume using a total variation regularization algorithm, and applying an iterative regularization process to suppress the noise level on the reconstructed CBCT volume.

Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.

Abstract: An x-ray imaging system and method for providing three-dimensional data representing the contents of an object. An x-ray source and x-ray screen are used to acquire multiple x-ray images of the object from different perspectives. The different perspectives are obtained by placing the x-ray source at one end of a moveable arm. These images are processed by back-projecting each perspective image at known distances between the object and the x-ray source, and superimposing the back-projected images at each distance, thereby providing a set of image slices of the object along the z-axis.

Abstract: A radiation source is relatively moved with respect to a radiation detector, on which a plurality of short-circuited pixels formed by short-circuiting TFT switches are arranged across the entire surface thereof. Radiation is irradiated onto a subject at a plurality of radiation source positions, in association with movement of the radiation source. A plurality of images corresponding to each of the plurality of the radiation source are obtained. Positions of detection short-circuited pixels for detecting a dose of radiation are set, respectively corresponding to the plurality of radiation source positions. The dose of radiation output from the radiation source is controlled, based on electric signals read out from the detection short-circuited pixels, at each of the plurality of radiation source positions.

Abstract: One object of this invention is to provide a radiation tomography apparatus for acquiring a tomographic image from a plurality of fluoroscopic images. The radiation tomography apparatus can acquire the tomographic image having superior visibility without being influenced by a shadow of a collimator appearing in the fluoroscopic image when radiation is applied only to a portion of an FPD through control of the collimator. In this invention, a boundary between a shadow area where the shadow of the collimator appears in the fluoroscopic image and a non-shadow area is identified, and the shadow area in the fluoroscopic image is complemented by the non-shadow area, etc., whereby a complement image is generated. Then the complement image is used for generating the tomographic image. According to this invention, an extremely dark area where the shadow of the collimator appears is removed and thereafter the tomographic image is generated.

Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.

Abstract: A method of evaluating a reservoir includes a multi-energy X-ray CT scan of a sample, obtaining bulk density and photoelectric effect index effect for the sample, estimation of at least mineral property using data obtained from at least one of a core gamma scan, a spectral gamma ray scan, an X-ray fluorescence (XRF) analysis, or an X-ray diffraction (XRD) analysis of the sample, and determination of at least one sample property by combining the bulk density, photoelectric effect index, and the at least one mineral property (e.g., total clay content). Reservoir properties, such as one or more of formation brittleness, porosity, organic material content, and permeability, can be determined by the method without need of detailed lab physical measurements or destruction of the sample. A system for evaluating a reservoir also is provided.

Abstract: A mammography system using a tissue exposure control relying on estimates of the thickness of the compressed and immobilized breast and of breast density to automatically derive one or more technic factors. The system further uses a tomosynthesis arrangement that maintains the focus of an anti-scatter grid on the x-ray source and also maintains the field of view of the x-ray receptor. Finally, the system finds an outline that forms a reduced field of view that still encompasses the breast in the image, and uses for further processing, transmission or archival storage the data within said reduced field of view.

Abstract: A detector arrangement is disclosed for performing phase-contrast measurements, including at least two transducer layers arranged one behind the other, wherein at least the first transducer layer arranged in the radiation direction includes alternate sensitive areas having a high absorptance for the conversion of incident radiation quanta into signals and less sensitive areas having a lower absorptance in comparison thereto. Further, a corresponding X-ray tomography device and a method for performing phase-contrast measurements are also enclosed.

Abstract: Disclosed is a tomosynthesis system in which the maintenance is easily performed. The tomosynthesis system of the present disclosure includes a vacuum chamber, a plurality of X-ray sources configured to be coupled to the vacuum chamber so as to protrude from the vacuum chamber to generate X-rays in a direction of a subject, and an image sensor configured to detect an X-ray projection image that passes through the subject.

Abstract: Tomosynthesis data may be acquired from an ionizing radiation source that substantially continuously emits radiation while its position is varied relative to a photon counting detector. The detector detects photons comprised within the radiation and photon data indicative of the detected photons is generated. The photon data may comprise data related to a detected photon's detection time, detection location on the detector, energy level, and/or trajectory from the radiation source, for example. The photon data of various photons may be compiled into a plurality of bins and, through reconstruction and tomosynthesis techniques, produce synthesized images of various tomography planes of an object under examination. In this way, the tomosynthesis techniques rely on counting photons rather than measuring their energy to create synthesized images.

Abstract: A multiradiation generation apparatus according to the present invention includes a plurality of radiation sources arranged in a row. Each of the radiation sources includes an electron source configured to emit electrons and a target unit configured to generate radiation upon receiving electrons emitted from the electron source. At least one of the radiation sources is a dual-purpose radiation source used for both tomosynthesis imaging and non-tomosynthesis imaging, and the other radiation sources are single-purpose radiation sources used only for tomosynthesis imaging.

Abstract: One object of this invention is to provide radiography apparatus with suppressed exposure to a subject in tomography mode. An FPD provided in X-ray apparatus according to this invention converts X-rays into electric signals, and thereafter amplifies the signals to output them to an image generation section. According to this invention, an amplification factor is higher in a tomography mode than in a spot radiography mode. A tomographic image is obtained through superimposing two or more fluoroscopic image. In comparison of the fluoroscopic images, they differ from one another in appearance of the false image. Accordingly, superimposing the images may achieve cancel of the false images. In this way, the tomographic image finally obtained has no false image.