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: An x-ray computed laminography imaging system includes a transmission x-ray source configured to generate x-rays, at least some of the x-rays propagate along an x-ray propagation axis through a region of interest of an object. The system further includes a stage assembly configured to rotate the object about a rotation axis extending through the region of interest. The system further includes at least one x-ray detector configured to intercept at least some of the x-rays propagating along the x-ray propagation axis. The at least one x-ray detector includes a scintillator, at least one optical lens, and two-dimensional pixelated imaging circuitry. The scintillator has a thickness that is substantially parallel to the x-ray propagation axis and the at least one optical lens is configured to receive visible light from the scintillator and to focus the visible light into a two-dimensional image.

Abstract: The present invention relates to a computer having an isolated user computing unit for responding to a system seizing attempt by a malicious code and minimizing damage to a system. A computer according to a feature proposed by the present invention comprises: a security management computing unit for managing connected I/O devices and auxiliary memory device unit; and a user computing unit which is isolated from the I/O devices, communicates with the I/O devices via an intercommunication unit responsible for communication between the security management computing unit and the user computing unit, has a separate CPU and memory, and is connected to the security management computing unit. The security management computing unit manages the I/O devices, monitors and restores a system, and monitors and controls the user computing unit, and the user computing unit is isolated from the security management computing unit and executes a user program and a user OS.

Abstract: An imaging system includes an imaging unit, a display unit, and at least one processor. The at least one processor is configured to acquire a first type of diagnostic imaging information of the patient; reconstruct a first image using the first type of diagnostic imaging information; if a first stop criterion for terminating imaging is not satisfied, acquire a second type of diagnostic imaging information having an increased level of acquisitional burden; reconstruct a second image; if a second stop criterion for terminating imaging is not satisfied, acquire a third type of diagnostic imaging information having an increased level of acquisitional burden, wherein the patient is maintained on a table of the imaging unit during the acquisition of the second type of diagnostic imaging information, reconstruction of the second image, and acquisition of the third type of diagnostic imaging information; reconstruct a third image; and display the third image.

Abstract: An diagnostic imaging apparatus including: a correction table; a top panel height calculation unit configured to calculate a height of the top panel corresponding to the distance between the fulcrum of the top panel and the imaging position, from an image captured by continuous imaging of the subject; an imaging position estimation unit configured to estimate an imaging position of an image captured by a different imaging method from a method for the captured image based on the height of the top panel calculated by the top panel height calculation unit, the distance between the fulcrum of the top panel corresponding to the height and the imaging position, and the correction table; and an image correction unit configured to align the imaging position of the image captured by the different imaging method with the imaging position of the image captured by the continuous imaging.

Abstract: The present invention relates to an X-ray system and method for generating 3D image data. The X-ray system comprises a radiation detector, a movable X-ray tube assembly and a control unit, wherein in a working state of the system the radiation detector is detachably positioned in a spatially fixed manner and the X-ray tube assembly can be moved into relative positions relative to the radiation detector. Projection images recorded in the relative positions can be processed together with the coordinates of the relative positions using an iterative reconstruction technique or other image processing methods so as to obtain 3D X-ray images. The X-ray tube assembly is attached to a motor-driven movable stand arm and can be displaced using a control unit. The stand base of the movable stand can be positioned in a spatially fixed manner, so that it has a defined fixed position relative to the radiation detector.

Abstract: The present invention relates to a photographing device including a power transmission unit. The power transmission unit includes a frame unit which is connected to the second drive body, an adaptor unit which is connected to the frame unit and is selectively connected to the first drive body or the support body by external power, an actuating unit which operates the adaptor unit, and a power unit which transmits power to the actuating unit. According to the power transmission unit of the X-ray mammography device, since biopsy photography and tomography can be performed using only one power transmission unit, the weight and size of the rotating arm may be reduced, and the vibration and noise produced thereby may be reduced. Thanks to the simple operation mechanism of the power transmission unit, power loss may be reduced, and the durability of each component may be improved.

Abstract: An image processing apparatus includes a memory unit which stores data of a first projection image and data of a second projection image, which are associated with the same object and are captured in different imaging directions, a display unit which displays the data of the first projection image and the data of the second projection image, a designation operation unit which is configured to designate a plurality of points on the displayed first and second projection images, and an operation supporting unit which generates operation supporting information for supporting an operation of designating, by the designation operation unit, the plurality of points on the second image, which anatomically correspond to the plurality of points designated on the first projection image.

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 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: Some aspects include acquisition of a first plurality of projection images of a volume using a megavoltage x-ray source, each of the first plurality of projection images associated with a respective one of a first plurality of locations of the megavoltage x-ray source, acquisition of a second plurality of projection images of the volume using a kilovoltage x-ray source, each of the second plurality of projection images associated with a respective one of a second plurality of locations of the kilovoltage x-ray source, and performance of digital tomosynthesis reconstruction to generate a three-dimensional image of the volume based on the first plurality of projection images and the second plurality of projection images. The first axis may be perpendicular to the second axis.

Abstract: A body section radiographic apparatus for serially acquiring a series of fluoroscopic images while synchronously moving a radiation source and a radiation detecting device, and obtaining a sectional image of a subject from the series of fluoroscopic images. The apparatus includes, besides the radiation source which emits a beam of radiation and the radiation detecting device which is opposed to the radiation source and has a plurality of radiation detecting elements, a synchronous moving device for moving the radiation source and the radiation detecting device synchronously with each other, and a radiation grid disposed to cover a radiation detecting plane of the radiation detecting device for removing scattered radiation. The fluoroscopic images are serially acquired while moving the radiation grid relative to the radiation detecting device to change positions where radiation transmission unevenness of the radiation grid is projected on the radiation detecting device.

Abstract: When a subject is irradiated with radiation, and the radiation that has passed through the subject is detected, body thickness information about the subject is obtained. Further, a slice image obtainment condition representing a range in which a slice image is obtained in the subject is set based on the body thickness information. Further, the slice image is obtained based on the slice image obtainment condition.

Abstract: A radiation source and a detection means are moved relative to each other, thereby moving the radiation source to a plurality of positions. A subject is irradiated with radiation from the plurality of positions to obtain a plurality of radiographic images of the subject. A slice image of the subject is reconstructed from the plurality of radiographic images. At this time, a first mode for moving only the radiation source or a second mode for moving both of the radiation source and the detection means is selected based on the condition of radiography, and the plurality of radiographic images are obtained in the selected mode.

Abstract: An image processing apparatus includes a memory unit which stores data of a first projection image and data of a second projection image, which are associated with the same object and are captured in different imaging directions, a display unit which displays the data of the first projection image and the data of the second projection image, a designation operation unit which is configured to designate a plurality of points on the displayed first and second projection images, and an operation supporting unit which generates operation supporting information for supporting an operation of designating, by the designation operation unit, the plurality of points on the second image, which anatomically correspond to the plurality of points designated on the first projection image.

Abstract: A radiation source is moved, relative to a detection means, in a movement range that is calculated based on a desired slice angle with respect to a predetermined base point on a base plane that defines a range of obtaining a slice image of a subject. The radiation source is moved to a plurality of positions, and a plurality of radiographic images of the subject corresponding to the plurality of positions are obtained by irradiating the subject with radiation from the plurality of positions. Further, a slice image of the subject is reconstructed from the plurality of radiographic images. When the slice image is reconstructed, radiographic images to be used to reconstruct the slice image are selected based on a distance from the detection surface of the detection means to a slice plane on which the slice image is to be generated, and the desired slice angle.

Abstract: An X-ray imaging apparatus includes a multi X-ray generating unit in which multiple X-ray foci are disposed in two-dimensional form at a predetermined pitch in a first direction, and a slit unit having multiple slit members each disposed opposite to its respective X-ray focus. Each slit member has multiple slits arranged in the first direction, and each of the slits forms a slice-formed X-ray beam whose lengthwise direction is a second direction that is different from the first direction. The two-dimensional detection unit detects the X-ray intensity of the formed X-ray beams at the detection surface. The X-ray imaging apparatus executes X-ray imaging at multiple positions while moving the multi X-ray generating unit and the slit unit in the first direction by the amount of the predetermined pitch, while keeping the relative positional relationship therebetween, and reconstructs an X-ray image based on the obtained X-ray intensity.

Abstract: An imaging method and apparatus is described in which distances between a source and an object are changed and projection images are generated at each of the different distances.

Abstract: In a known type of tomosynthesis x-ray source and x-ray detector are linearly moved and x-rays images are taken for a large number of positions, the images being reconstructed to give a 3D image record. According to the invention x-ray source and x-ray detector are swiveled and a sequence of x-rays is subsequently taken again, x-ray source and x-ray detector again being moved in a straight line. One drawback of simple tomosynthesis with movement in a straight line is suppressed thereby, the drawback being that the quality of reconstruction is particularly poor in a certain direction.

Abstract: The present invention proposes a technique capable of accurately grasping position and angle of a radiation generator at the time of image capturing. At the time of obtaining a plurality of transmission images by detecting radiation emitted from a emitting generator and passing through a specimen via a predetermined member (for example, a diaphragm) by a detector for a plurality of times while changing a relative position relation and a relative angle relation of the emitting generator to the detector, an outer-edge shape of a radiation area irradiated with the radiation on a detection surface of the detector from the emitting generator is recognized. On the basis of the outer-edge shape of the radiation area and an inner-edge shape of a predetermined member, the relative position relation and the relative angle relation of the emitting generator to the detector are obtained.

Abstract: A portable tomosynthesis imaging system is disclosed that includes a portable X-ray source assembly and a portable detector assembly. The source assembly may be coupled to a portable power supply and controller such that multiple projection X-ray images may be obtained at a site that is not accessible by conventional tomosynthesis imaging systems. Image data may be transmitted from the detector by wired or wireless communication. Tomosynthesis image reconstruction may be performed locally at the portable system or remotely by the transmission of raw or filtered image data from the portable system. The portable system is particularly well-suited to field deployment, such as at accident scenes, scenes of natural or other disasters, or in confined clinical settings.

Abstract: A method is disclosed for production of computer-tomographic scans via a CT system of a patient during an intervention with an instrument. An X-ray tube is moved on a rotation plane around the patient in order to produce a beam cone, and a detector with a plurality of detector elements measuring the radiation intensity after passing through the patient. Computer-tomographic scans are reconstructed from the measured values in a computation unit. The central direction of the beams of the scanning beam cone is set at an angle to the intervention axis, and at least one slice plane which differs from the rotation plane of the beam cone is displayed on a display.

Abstract: A laminography inspection system comprises an irradiation source, a plurality of linear image detectors defining an image plane, a fixed table for placement of a test object in a stationary position between the irradiation source and the image detectors, and a computing device for processing a plurality of images of the test object acquired from the image detectors. The irradiation source and the image detectors perform a plurality of parallel linear scanning passes across the area of the test object to acquire images of the test object under different viewing angles. Based on the acquired image data, the computing device determines a warp compensation and generates a cross-sectional image of a selected section within the test object.

Abstract: A detector module, in at least one embodiment, is disclosed for x-radiation or gamma radiation that includes one or more optical waveguide sections that are arranged next to one another in order to form one or more detector rows and are optically interconnected in serial fashion. The waveguide sections include one or more converter materials for converting incident x-radiation or gamma radiation into optical radiation and are designed in such a way that optical radiation of different wavelength is generated in respectively neighboring regions along the waveguide sections upon incidence of x-radiation or gamma radiation. The present detector module, in at least one embodiment, can be implemented cost effectively with a high number of detector rows, and is of very low weight.

Abstract: An imaging method and apparatus is described in which distances between a source and an object are changed and projection images are generated at each of the different distances.

Abstract: The presently described technology provides a tomosynthesis imaging system that comprises an x-ray tube and an anti-scatter grid. The x-ray tube is configured to emit x-rays from a plurality of positions during movement of the x-ray tube along a long axis of a mobile patient surface. The anti-scatter grid is configured to filter out scattered x-rays and includes a grid line parallel to the long axis of the mobile patient surface. The x-rays emitted from the plurality of positions are reconstructed into at least one image of at least one plane of a patient anatomy. The described technology is useful in emergency or trauma applications where a patient may be quickly and easily moved on a mobile patient surface to a position near an x-ray detector used in combination with the x-ray tube and anti-scatter grid.

Abstract: A method and system for defining at least one of a plurality of acquisition and processing parameters in a tomosynthesis imaging system are disclosed herein. The method involves providing a user interface that allows a user to quickly and easily specify at least one desired characteristic of a reconstructed image. Based on the user-specified image characteristic, at least one of a desired set of acquisition and processing parameters for the tomosynthesis imaging system is automatically defined. The user interface interacts with a processor for deriving acquisition and processing parameters based upon image characteristics specified by the user using a user interface.

Abstract: An inter-image operation apparatus has temporal subtraction means for calculating a temporal subtraction image from two or more sets of base image data, and history data recording means for recording history data concerning the calculated temporal subtraction image in a database server and concurrently attaching the same history data to the data on the temporal subtraction image. The history data may include information identifying the two or more base images, the date of calculating the temporal subtraction image, the ID number of the patient, the name of the photographed portion of the patient, the photographing angle of the patient, etc. A desired temporal subtraction image may be immediately fetched from the database server by referring to the history data attached thereto if that temporal subtraction image had already been obtained, instead of recalculating that temporal subtraction image. Thus, the diagnostic process of comparing two or more images of an identical object can be carried out efficiently.

Abstract: A system for low dose x-ray imaging provides for dynamic generation of an x-ray beam with specific shape, and dynamic tracking of a detector with said beam. The detector is rotatable, and translatable along two orthogonal axes, and may mount with a circular detector tray, the tray rotating around a rotation axis. Specific detector shapes include an elongated rectangular matrix, for example with additional detector cells near the rotation center to provide an increased area of continuous detection. Dynamic low-dose x-ray tomosynthesis or limited-angle tomographic imaging is enabled via simultaneous x-ray tube and detector motions during examination, such as fluoroscopic examination of a human body. Data acquired at multiple projection angles is input to a 3D image reconstruction algorithm that provides a refreshed 3D data set during continuing examination. The system may thus also automatically track a point in three-dimensional space, for example continuously locating the tip of a catheter.

Abstract: A system for low dose x-ray imaging provides for dynamic generation of an x-ray beam with specific shape, and dynamic tracking of a detector with said beam. The detector is rotatable, and translatable along two orthogonal axes, and may mount with a circular detector tray, the tray rotating around a rotation axis. Specific detector shapes include an elongated rectangular matrix, for example with additional detector cells near the rotation center to provide an increased area of continuous detection. Dynamic low-dose x-ray tomosynthesis or limited-angle tomographic imaging is enabled via simultaneous x-ray tube and detector motions during examination, such as fluoroscopic examination of a human body. Data acquired at multiple projection angles is input to a 3D image reconstruction algorithm that provides a refreshed 3D data set during continuing examination. The system may thus also automatically track a point in three-dimensional space, for example continuously locating the tip of a catheter.

Abstract: To provide a radiation image pick-up device capable of obtaining a plurality of tomography images through single-time image pick-up, a radiation image pick-up method and a program. When a position controller moves an X-ray source to an optional tomography plane in an object to be detected in parallel and the X-ray source is present at geometric focuses set at equal interval, X rays are pulsatively generated by the X-ray source and detection of X rays by a radiation detector is performed by the total of n times. Moreover, a position controller moves the radiation detector in accordance with the movement of the X-ray source.

Abstract: A method for displaying a computer-generated determination of the likelihood of malignancy in a mammogram lesion. The method requires providing a digitized image of a mammogram, displaying the digitized image, and selecting a region of interest directly on the displayed digitized image. The digitized image is then processed so that classifier data of the lesion in the user-selected region of interest are generated and displayed. A system for displaying a determination of the likelihood of malignancy in a mammogram lesion. The system includes a display for presenting a digitized mammogram and an input device in communication with the display for selectably indicating a region of interest on the displayed mammogram. The system also includes a processor for generating classifier data related to a characterization feature within the region of interest. The classifier data is presented on the display.

Abstract: An apparatus for radiographing an object using radiation from a movable radiation source, includes a detection unit which detects a radiation image of an object, a supporting unit which supports the object, and a control unit which controls a movement of at least one of the detection unit and the supporting unit, based on information of a position of the radiation source and a part to be radiographed of the object, such that a projection image of the part to be radiographed can be detected by the detection unit.

Abstract: An apparatus for obtaining tomographic data of an object comprises a radiation source (50), a detector (42) comprising multiple line detectors (41), an object region (53) arranged in the radiation path between the source and the detector, and a device (54) for moving the source and detector relative the object, while each of the line detectors records multiple line images of radiation as transmitted through the object. The source emits radiation within a large angle to irradiate the object completely in one dimension (y), and the line detectors are sited in rows (71) and columns (72), wherein the line detectors in each row together define an opening angle (?) large enough to detect the object completely in the dimension (y).

Abstract: An imaging system for performing tomosynthesis on a region of an object comprises an x-ray source, motion controller, an x-ray detector and a processing unit. The x-ray source is positioned at a predetermined distance from the object and continuously moves along a linear path relative to the object. The x-ray source transmits x-ray radiation through the region of the object at a plurality of predetermined locations. The motion controller is coupled to the x-ray source and continuously moves the x-ray source along the path relative to the object. The x-ray source minimizes vibration in the imaging system due to continuous movement. The x-ray detector is positioned at a predetermined distance from the x-ray source and detects the x-ray radiation transmitted through the region of the object, thus acquiring x-ray image data representative of the region of the object.

Abstract: The present invention provides a method and system for determining the position of the image of a target object or the position of the x-ray source in digital tomosynthesis, as the x-ray source is moved relative to the object so as to obtain multiple two-dimensional images of the object from multiple angles. At least one marker, characterized by a simple and known image pattern, is disposed between an x-ray source and a detector system. The shift in the image of the object, resulting from the movement of the x-ray source during tomosynthesis, is calculated to a desired resolution using the readily observable shift in the image of the marker. The x-ray source may be translated along a plane parallel to the plane of the detector system, or may be rotated about a fixed center.

Abstract: An apparatus for obtaining tomosynthesis data of an object (5) comprises a radiation source (1) emitting radiation (2) centered around an axis of symmetry (3); a radiation detector (6) comprising a stack of line detectors (6a), each being directed towards the divergent radiation source to allow a ray bundle (b1, . . . , bn, . . . , bN) of the radiation that propagates in a respective one of a plurality of different angles (?1, . . . , ?n, . . . , ?N) to enter the line detector; an object area arranged in the radiation path between the divergent radiation source and the radiation detector for housing the object; and a device (7) for moving the radiation source and the radiation detector relative the object essentially linearly in a direction (8) essentially orthogonal to the axis of symmetry, while each of the stack of line detectors is adapted to record a plurality of line images of radiation as transmitted through the object in a respective one of the plurality of different angles.

Abstract: A method is provided for acquiring digital x-ray images. Scan parameters designating slices of interest from a patient anatomy are identified. The travel distance and the speed of the x-ray tube and the detector are determined from the scan parameters. The patient is scanned in a first direction to obtain a first x-ray image utilizing a servo-tomo function based on the scan parameters. The image is saved in an image storage device and is displayed. The patient is scanned in a second direction to obtain a second x-ray image utilizing the servo-tomo function based on the scan parameters. The image is saved and displayed simultaneously with the first image in a multi-image format. After each scan, the operator may modify the scan parameters designating a slice of interest before initiating the next scan.

Abstract: A digital tomosynthesis system acquires a plurality of projection radiographs of an object and reconstructs structures of the object based on the acquired projection radiographs. The digital tomosynthesis system includes an x-ray source and a detector. The x-ray source emits a beam of x-rays, and moves in a linear trajectory relative to the detector.

Abstract: A digital tomosynthesis system acquires a plurality of projection radiographs of an object and reconstructs structures of the object based on the acquired projection radiographs. The digital tomosynthesis system includes an x-ray source and a detector. The x-ray source emits a beam of x-rays, and moves in a linear trajectory relative to the detector.

Abstract: A digital tomography system includes an electron source that provides a beam of electrons, and an electromagnet assembly that receives said beam of electrons and is configured and arranged to direct the beam of electrons along a selected path, wherein the assembly provides a redirected beam of electrons. The system also includes a target that is struck by the redirected beam of electrons and generates a cone of x-rays, and a slit collimator that receives the cone of x-rays and generates a fan beam. A first line of detectors is positioned to detect x-rays that pass through the object under inspection, and provide sensed signals indicative thereof to a controller that receives the sensed signals and forms a displayable image of a selected plane through the object under inspection.

Abstract: An X-ray device for the formation of slice images of an object to be examined including an X-ray source, an X-ray detector, a transport device for moving the object during the acquisition of a series of X-ray projection images of the object in a movement plane situated parallel to the imaging plane, and a control device for controlling the acquisition of the X-ray projection images and the transport device. Slice images of the object are formed from the X-ray projection images by a tomosynthesis method.

Abstract: A self-modulated solid state laser comprises an intracavity optical waveguide that supports a multiplicity of lasing filaments each at a different optical frequency. At least two of the filaments temporally beat with one another so as to modulate the intensity of the laser output. In accordance with one embodiment of our invention, the waveguide supports a multiplicity of transverse modes, and the laser includes a mode mixing mechanism that mixes the energy of at least two pairs of the modes, each coupled pair generating a separate filament. In an illustrative embodiment, the filaments are mode locked and the laser output is modulated at a frequency on the order of 1 THz.

Abstract: In a method for image reconstruction in imaging technology for the implementation of a fast convolution with the transformation length M while allowing slight over-convolution errors, each of p or 2p out of n measured projections of the length N are convolved with a modified filter kernel h (k) using Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) simultaneously in one step.

Abstract: A slice level display for x-ray systems has a projector arranged next to a patient-support plate which emits light beam directed onto a patient on the support plate, projector being coupled to a drive system in order to displace an x-ray radiator and an exposure cassette, seated under the patient-support plate, oppositely around the light beam axis as a pivot point of their connecting line. The x-ray radiator and the exposure cassette are displaceable via separate drives that are coupled with a control unit having a position sensor associated therewith. The position sensor supplies height position signals of the projector to the control unit which are used to calculate control signals for operating the respective drives for displacing the x-ray radiator and the cassette. The projector and a displacement mechanism therefor and the height position sensor are detachably securable to the patient-support plate as a structural unit.

Abstract: The invention relates to a method for the automatic adjustment of exposure parameters in an imaging apparatus operating on linear tomographic principles and intended for the slice imaging of the region of denture and temporomandibular joints. The method includes a stage for measuring a radiation (8) transmitted through the skull and for adjusting exposure parameters on the basis of the measuring result.

Abstract: A system is provided for acquiring data for use in constructing a CT image of an object having a region of special interest, the system generally including an x-ray cone-beam source and an array detector having first and second zones, the resolution of the first zone being greater than the resolution of the second zone. Relative movement is established between the source and the object along a first path of translation, to position the source in a succession of view positions with respect to the object. The detector is moved along a second path of translation, which is substantially parallel to the first path, to position the detector at a succession of detector positions, each corresponding to one of the view positions. At each view position, the source is operated to project the beam toward the object, the beam axis being directed to intersect both the geometric center of the region of special interest, and the center point of the first resolution zone of the detector.

Abstract: A tower structure (1) carries a pivotable swing arm (2) which has a geometric extension which deviates from the rectilinear between a first end at which the arm carries a holder (3) for an image-receptor accommodating cassette, and a second end at which the swing arm carries a beam source (5) and a counterweight (6). The structure includes a coupling means (2a) by means of which the arm can be coupled to a frame (16) of an examination table (14) comprising a table top which can be moved in two mutually perpendicular directions. When the coupling means is engaged, the tower structure and the examination table form a unit, with the image receptor located in a plane parallel with the table top (19) and slightly spaced therefrom. The cassette holder can be displaced linearly in the longitudinal direction of the table, to enable photographs to be taken with an angled beam path.

Abstract: A radiation image recording and read-out apparatus comprises an image recording section, an image reading section, an erasing section, a circulating and conveying means for conveying stimulable phosphor sheets from section to section and a radiation source which is provided opposed to the image recording section spaced therefrom by a predetermined distance. The circulating and conveying means is arranged to convey the stimulable phosphor sheet in the image recording section. The radiation source is arranged to be movable over the object in the image recording section. A motion control mechanism moves the stimulable phosphor sheet and the radiation source relative to each other in the image recording section substantially satisfying a linear law and a geometric law with respect to a desired cross section of the object.

Abstract: Apparatus for making sectional radiographs which allows for the operator to preset the scanning patterns to be followed by the apparatus during the making of a sectional radiograph. The operator positions the source or the image detector in at least one point on the path defining the desired scanning pattern. This position is measured and applied to an arithmetic device which derives therefrom reference values for driving the source and the image detector.