Abstract: In order to achieve a consistently good image quality, an X-ray device has an X-ray source in the form of an X-ray radiator (1) and an X-ray detector (2) with a precisely defined mutual arrangement, and a subsystem (5-7; 10-11) for detecting any deviation between the actual mutual arrangement and the precise mutual arrangement of X-ray source and X-ray detector (2). Optical detection of deviations is preferably provided.

Abstract: An X-ray imaging apparatus includes a visible light imaging unit which captures an image of a visual field region with visible light, an X-ray irradiation unit which irradiates X-rays, an X-ray imaging unit which receives the irradiated X-rays and acquires a radiograph based on the X-rays, and a detection unit which detects an irradiated region irradiated with the X-rays based on the acquired radiograph.

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: An X-ray imaging apparatus includes an X-ray generation unit configured to irradiate an object with X-rays in a rectangular shape, and an imaging unit which has a rectangular imaging plane and is configured to receive the X-rays transmitted through the object as an X-ray image, wherein the imaging unit is arranged on a plane which is spaced a predetermined distance apart from the X-ray generation unit and perpendicular to an X-ray reference axis such that a center of an irradiation field and a center of the imaging plane match with each other and rotational angles of the irradiation field and the imaging plane around the X-ray reference axis match with each other, by matching at least three visible light beams which have directionality and are irradiated from the X-ray generation unit, with distance indexes provided in the imaging unit.

Abstract: A non-invasive means and method locates a target spinal segment on a patient prior to surgery. An apparatus comprises a frame; a plurality of laser diodes projecting planar beams and mounted on the perimeter of the frame; a radio-opaque cable attached to the frame at the location of a laser diode; optionally, a weight is attached to the cable; optionally a rod extends from the frame perimeter; and optionally a bombsight is included within the frame marked with crosshairs. The method comprises the steps of marking a patient's skin; placing the frame on the patient; turning on the laser diodes; rotating the frame until the until a line of visible light is perpendicular to the patient's spine; aligning the cable with the planar laser beam; providing an X-ray source; aligning the X-ray source with the planar laser beam and obtaining an X-ray.

Abstract: A first laser device and a second laser device direct a laser beam towards a patient before a CT scan to visually indicate an outer boundary of an area where x-rays will be directed during the CT scan. Each laser device includes a prism that deflects the laser beams to form lines on the patient that define an outer boundary of an area of the patient that will be exposed to the x-rays. If the area of the patient between the lines is not the desired area, the operator can move the patient until the desired area of the patient is located between the lines. A third laser device can direct a laser beam to define an outer boundary that is used to ensure proper orientation of the patient in the space.

Abstract: A radiosurgery system is described that is configured to deliver a therapeutic dose of radiation to a target structure in a patient. In some embodiments, inflammatory ocular disorders are treated, specifically macular degeneration. In some embodiments, other disorders or tissues of a body are treated with the dose of radiation. In some embodiments, the target tissues are placed in a global coordinate system based on ocular imaging. In some embodiments, the target tissues inside the global coordinate system lead to direction of an automated positioning system that is directed based on the target tissues within the coordinate system. In some embodiments, a treatment plan is utilized in which beam energy and direction and duration of time for treatment is determined for a specific disease to be treated and/or structures to be avoided. In some embodiments, a fiducial marker is used to identify the location of the target tissues.

Abstract: A system and method for planning and performing a percutaneous medical procedure is described. A three dimensional data set of a patient is registered with respect to a patient position and an interventional apparatus, which may be a C-arm X-ray device. A target within the patient is identified in the image data, and a skin entry point chosen for planning the procedure. The image data set is processed so as to compute a two dimensional fluoroscopic overlay image upon which the target and the skin entry point are displayed. The angulation of the volumetric representation of the C-arm is controlled so as to plan the guiding path for an interventional device, and the planning attempts to achieve one of a bull's eye orientation or a generalized bull's orientation. The interventional device is aligned with the guiding axis to perform the procedure, which may be monitored using X-ray progression views.

Abstract: A radiation image capturing system detects the position of a radiation detecting cassette disposed below a patient and the position of a radiation source for emitting a radiation, based on the differences between the propagation times of radio waves emitted from an antenna device to an image capturing apparatus and the radiation detecting cassette. Based on the detected positions, the relative positions of the image capturing apparatus and the radiation detecting cassette are calculated, and then compared with each other by a position determining unit to judge how the image capturing apparatus is positioned with respect to the radiation detecting cassette. If the image capturing apparatus is not positioned in head-on facing relation to the radiation detecting cassette, then a warning is issued, and an actuating mechanism moves the image capturing apparatus to an appropriate position.

Abstract: A targeting system, which provides an adjustable optical assembly, for use with imaging systems having a penetrating beam source, a penetrating beam receiver. The optical assembly has a targeting marker in the path of a penetrating beam emitted by the source. The targeting marker is at least partially opaque to the penetrating beam emitted by the source, and the targeting marker indicates a targeting point on a target axis. The optical assembly further includes a sensible targeting beam device that is capable of providing a sensible targeting beam coaxial and collinear with the target axis. In addition, there is provide a method of aligning the targeting system, such as the system described above, and a method of targeting an area of interest. One advantage of the system and method is that it requires only a two point alignment.

Abstract: A diagnostic imaging system includes a stationary gantry (20) which defines a subject-receiving bore (26). First and second lasers (66, 68) are firmly mounted to the stationary gantry (20). A saggital laser (48) is mounted overhead to project a longitudinal line (58) on a top of the subject in a vertical plane (60) which is parallel to an axial direction (Z). A couch (36) moves a subject into the bore (26)to generate an image of a region of interest and out of the bore for marking. A user segments the image to outline at least an organ. An isocenter (94) of the segmented organ is determined. At least one of the saggital, first and second lasers (48, 66, 68) are adjusted concurrently with adjusting the couch (36) such that laser lines (58, 76, 78) projected by the saggital, first and second lasers (48, 66, 68) intersect the determined isocenter (94). The saggital, first and second lasers (48, 66, 68) laser mark the subject.

Abstract: A method and system of aligning an x-ray detector and x-ray tube for data acquisition are presented. The x-ray detector and x-ray tube are equipped with transmitters and receivers designed to provide feedback relating to the orientation, spacing, and general position thereof. In this regard, a user can effectively and efficiently position the x-ray tube and x-ray detector relative to one another for data acquisition.

Abstract: Disclosed is a mobile radiographic unit with improved x-ray scatter control. Improved x-ray scatter control is provided through the alignment of the system with the focal line of an anti-scatter grid. In a preferred embodiment, the system comprises an x-ray source assembly, a tube housing mounting, a measuring system, a motion control system and a processor in communication with the measuring system and the motion control system.

Abstract: A method and apparatus for verifying radiation beam alignment in an image guided stereotactic radiosurgery (SRS) delivery system such as the Cyberknife™. SRS systems such as the Cyberknife™ use a high-precision robotic manipulator with an image-guided system to deliver beams of radiation to a target for optimal clinical results. This radiation delivery system does not usually rotate around a fixed center of axis, therefore a set of pre-programmed positions (nodes) defined as a path is often configured into the system's software to allow proper radiation treatment. In order to achieve the accuracy of the image-guided SRS radiation delivery, these nodes must be calibrated regularly to verify that the radiation beam axis precisely passes through a certain reference point or alignment center with predefined angles. This invention achieves precise verification of radiation beam alignment with a radiation beam detection apparatus mounted on a gimbal assembly.

Abstract: An X-ray optical alignment system for X-ray imaging devices includes a visible-light point source and a multi-axis positioner therefor, fixedly mounted with respect to the X-ray focal spot. A mirror or beamsplitter is fixedly mounted with respect to the X-ray focal spot and disposed in the beam path of the X-ray source. The beamsplitter reflects light emitted from the light source and transmits X-rays emitted from the X-ray source. A first X-ray attenuating grid is fixedly but removably mountable with respect to the X-ray source, having a first X-ray attenuation pattern; and a second X-ray attenuating grid is adjustably mountable with respect to the first grid having a second X-ray attenuating pattern corresponding to the first X-ray attenuating pattern. When the grids are aligned, their attenuating patterns are also aligned and allow X-rays from the X-ray source and light reflected from the beamsplitter to pass therethrough.

Abstract: An imaging system has an inventive light source coupled to its X-ray detector to project a visible light beam onto the patient so that the patient may be aligned with an area of exposure (e.g., the area which X-Rays from the emitter will contact). In some cases, the light beam is a rectangular beam which substantially indicates the area of exposure. The imaging system also has a motion detector to detect movement of the object, the X-Ray emitter, and the X-Ray detector. With the motion detector, the imaging system is automated to automatically turn the light source on whenever the patient or the imaging system (e.g., the table) moves. Similarly, the imaging system is automated to turn off the light source when X-Raying begins.

Abstract: An X-ray device for imaging at least one part of an examination object. The X-ray device includes a support arm that supports an emitter head and an X-ray detector. The emitter head includes an X-ray source. A first light source is operative to illuminate a surface, which is to be irradiated by the X-ray source, of the examination part of the examination object. A second light source is operative to illuminate a work region in which the part of the examination object is positioned during the imaging.

Abstract: Sample mounts (10) for mounting microcrystals of biological macromolecules for X-ray crystallography are prepared by using patterned thin polyimide films (12) that have curvature imparted thereto, for example, by being attached to a curved outer surface of a small metal rod (16). The patterned film (12) preferably includes a tip end (24) for holding a crystal. Preferably, a small sample aperture is disposed in the film for reception of the crystal. A second, larger aperture can also be provided that is connected to the sample aperture by a drainage channel, allowing removal of excess liquid and easier manipulation in viscous solutions. The curvature imparted to the film (12) increases the film's rigidity and allows a convenient scoop-like action for retrieving crystals. The polyimide contributes minimally to background and absorption, and can be treated to obtain desired hydrophobicity or hydrophilicity.

Abstract: A radiation imaging system has a radiation source having an adjustable angular orientation and an emitter that provides an alignment signal and is coupled to the radiation source. A two dimensional radiation image detection device has a receiver that records an image according to radiation emitted from the radiation source, a first sensor coupled in a fixed position relative to the receiver that detects the alignment signal from the emitter and provides a first response signal and a second sensor coupled in a fixed position relative to the receiver that detects the alignment signal from the emitter and provides a second response signal. A control logic processor is in communication with the first and second sensors for receiving the first and second response signals and further in communication with at least one indicator for indicating the alignment of the image detection device relative to the radiation source.

Abstract: An apparatus for aligning a radiation source with an image receiver has a first light source coupled to the radiation source and actuable to direct a first beam of light toward the image receiver and a second light source coupled to the radiation source and actuable to direct a second beam of light toward the image receiver. A reflector element is coupled to the image receiver and is disposed to form, when placed in the path of both first and second light beams, a pattern of reflected light that indicates the relative alignment of the image receiver to the radiation source.

Abstract: An arrangement device including: a photography section, which photographs a first mark and a second mark in a state in which a semiconductor integrated circuit to which the first mark is applied and a member to which the second mark is applied, which member is to be used in combination with the semiconductor integrated circuit, overlap; and a movement section, which relatively moves at least one of the semiconductor integrated circuit and the member with respect to the other thereof on the basis of positions of the first mark and the second mark which have been photographed by the photography section.

Abstract: A radiation image projection apparatus includes an image acquisition unit for acquiring a radiation image obtained by capturing an image of radiation transmitted through an object and a projection unit for projecting the radiation image as visible light onto the object.

Abstract: An apparatus for aligning a radiation source with an image receiver. The apparatus includes first and second light sources. The first light source is coupled to the image receiver and actuable to direct a first pattern of light toward the radiation source. The second light source is coupled to the image receiver and actuable to direct a second pattern of light toward the radiation source. The spatial relationship of the two patterns on or near the radiation source indicates a predetermined alignment position for the radiation source.

Abstract: A medical imaging installation and a method for a medical imaging installation are disclosed for defining a specific position on the surface of an object. In at least one embodiment, the installation has a support apparatus for an object, a device for recording measured data from the object in order to produce an image of the object, a unit for displaying an image obtained from the object, and a device, arranged on the installation in a defined fashion, for projecting a light pattern onto the surface of the object. The light pattern is inserted appropriately into the displayed image of the object in order to define a specific position on the surface of the object.

Abstract: A multiple point source test phantom is used for calibration of detector positioning of a nuclear medical imaging apparatus. An absolute coordinate system for the detectors is aligned to an image reconstruction space coordinate system by fitting a Gaussian surface to a peak of a center point source of said test phantom, and using displacement parameters as obtained from the fitted Gaussian surface to calculate a displacement correction parameter, which is used to move a patient bed of the imaging apparatus such that the image reconstruction space is aligned with the absolute coordinate system.

Abstract: A device is provided for inspecting objects, particularly pieces of luggage, for suspicious contents using electromagnetic radiation. The device includes a housing comprised of a support and a closable opening through which an object to be inspected can be placed on a receiving element; a source for electromagnetic radiation and a designated detector array, both of which are arranged in the housing such that an inspection area is located above the receiving element; a positioning aid, which indicates the inspection area to an operator; and an evaluation unit including a computer, where the radiation intensities measured by the detector array are evaluated with respect to suspicious materials.

Abstract: An object of the present invention is to provide a radiography system in which an FOV in a light field agrees with an FOV in an X-ray field irrespective of a displacement of a light source. The radiography system comprises an X-ray tube, a collimator that forms an X-ray beam to be irradiated from the X-ray tube to an object of radiography, and a light source that irradiates light, which is used for ranging, to the object of radiography via the collimator. The radiography system further comprises a memory in which the magnitude of a displacement of the light source calculated in advance is stored, and a control unit that controls the opening of the collimator on the basis of the position of the light source, which is corrected based on the magnitude of a displacement read from the memory, so that an FOV of light to be used for ranging will agree with a target value.

Abstract: In order to achieve a consistently good image quality, an X-ray device has an X-ray source in the form of an X-ray radiator (1) and an X-ray detector (2) with a precisely defined mutual arrangement, and a subsystem (5-7; 10-11) for detecting any deviation between the actual mutual arrangement and the precise mutual arrangement of X-ray source and X-ray detector (2). Optical detection of deviations is preferably provided.

Abstract: An imaging system has an inventive light source coupled to its X-ray detector to project a visible light beam onto the patient so that the patient may be aligned with an area of exposure (e.g., the area which X-Rays from the emitter will contact). In some cases, the light beam is a rectangular beam which substantially indicates the area of exposure. The imaging system also has a motion detector to detect movement of the object, the X-Ray emitter, and the X-Ray detector. With the motion detector, the imaging system is automated to automatically turn the light source on whenever the patient or the imaging system (e.g., the table) moves. Similarly, the imaging system is automated to turn off the light source when X-Raying begins.

Abstract: With a view to providing an X-ray imaging apparatus having a projector-collimator capable of adjusting an irradiation position of a light beam easily and accurately, a first luminous flux is made a luminous flux present within an orthogonal plate orthogonal to a y-axis direction which is an orthogonal direction and a second luminous flux present within the orthogonal plane is reflected and moved within the orthogonal plane to produce a light beam. Consequently, an irradiation position of the light beam over a subject can be adjusted in an independent manner by movement ?y in the orthogonal direction with use of a first screw and movement ?x within the orthogonal plane with use of a second crew. As a result, adjustment of an X-ray irradiation field position by an operator can be effected not only easily but also with a high accuracy.

Abstract: An X-ray apparatus and a mammographic X-ray apparatus are provided. The X-ray apparatus includes an X-ray beam generated by an X-ray source and a diaphragm. At least one LED is disposed as an indicator between the X-ray source and the diaphragm. The illuminating beam of the LED is directed in an undeflected fashion onto the X-ray field. The LED may be pivotable (swivable) out of the X-ray beam. The LED is mounted on a filter array that is mounted between the X-ray source and the diaphragm.

Abstract: A method and system are providing for performing X-ray diagnostic imaging using a camera image controlled to image a field of view (FOV) that is substantially coincident and coplanar with a radiation footprint or FOV of an X-ray beam radiated towards a patient under examination. Both the X-ray beam and camera FOVs are shaped and/or limited by collimation. The method and system include acquiring a camera image with a collimated FOV to an X-ray beam FOV before X-ray imaging a patient, displaying the camera image and adjusting the collimation and patient positioning to define the X-ray beam FOV based on the displayed camera image before X-ray imaging the patient. After adjustment, the method and system include radiating the X-ray beam as collimated during the patient X-ray imaging, acquiring and processing captured X-ray image information to reconstruct an X-ray image and displaying the reconstructed X-ray image with the displayed camera image.

Abstract: A unit (11) with a length (L) is utilized in a device for indicating the position of an edge (7a) of a first area (7) which is irradiated by an x-ray radiation source (2) in relation to an edge (9a) of a second area, completely or partially coinciding with the first area, which second area is illuminated by a light source. The unit is provided with a first and second parts separated by a mark (12), which parts are intended to extend inside the second area and outside the second area respectively. The unit (11) comprises x-ray radiation-indicating elements (14, 22) that assume a first indication state in the presence of x-ray radiation (6) and a second indication state in the absence of x-ray radiation. The position indication can be determined by means of the said mark and indication states. The invention also relates to an arrangement and a method for the said position indication.

Abstract: A method and system of visual inspection for use with a gamma system includes a monitoring device connected within a housing proximate to a mechanical indicator of the rotating gamma system for capturing data comprising at least one of positional and operational data associated with the mechanical indicator. A control center monitors the captured data which is provided by a communication device connected between the monitoring device and the control center. Upon display of the captured data a user is able to review, monitor and maintain operation of the gamma system.

Abstract: The invention relates to a method for monitoring an x-ray apparatus. To prevent the application of a harmful x-ray dose, it is proposed in accordance with the invention to compare a distance value indicating a distance between an x-ray source and a surface of a patient with a predetermined mini-mum distance value and to generate a warning signal, if the distance value is smaller than the minimum distance value.

Abstract: Systems and methods for alignment in a medical imaging device are provided. An alignment system includes a source of visible light and a reflector. The source of visible light is configured to project a beam of visible light within a field of view of the medical imaging device, and the reflector is configured to direct the projected beam of visible light along a central axis of the medical imaging device.

Abstract: An X-ray apparatus, in particular a dental X-ray apparatus, includes an X-ray radiation source for generating X-ray radiation to be directed at an object to be investigated, for example, a patient's tooth or jaw. The apparatus has an optical device through which an aiming device, for example, an additional visible pilot radiation generated by a further light source, is directed substantially parallel to the X-ray radiation at the object to be investigated to facilitate the positioning of the X-ray head.

Abstract: Sample mounts (10) for mounting microcrystals of biological macromolecules for X-ray crystallography are prepared by using patterned thin polyimide films (12) that have curvature imparted thereto, for example, by being attached to a curved outer surface of a small metal rod (16). The patterned film (12) preferably includes a tapered tip end (24) for holding a crystal. Preferably, a small sample aperture is disposed in the film for reception of the crystal. A second, larger aperture can also be provided that is connected to the sample aperture by a drainage channel, allowing removal of excess liquid and easier manipulation in viscous solutions. The curvature imparted to the film (12) increases the film's rigidity and allows a convenient scoop-like action for retrieving crystals. The polyimide contributes minimally to background and absorption, and can be treated to obtain desired hydrophobicity or hydrophilicity.

Abstract: A projection system for projecting a shape onto a scene (e.g., the surface of an object, the body of a patient, or the like) so that the shape appears to be projected via a light beam emanating from a desired source location includes two or more projection assemblies for projecting planes of light which intersect the scene to form light stripes on the scene. The intersection of the light stripes defines a point of light projected onto the scene so that the point of light appears to emanate from the source location. The first and second projection assemblies rotate about first and second axes which extend through the source location for controlling the position of the point of light on the scene.

Abstract: A quality control system for an irradiation apparatus includes a radiation image reading system. The radiation image reading system reads out a radiation image from a stimulable phosphor panel which is disposed in a predetermined position to receive irradiation of position check radiation from an irradiation system and irradiation of uniform radiation from the irradiation system to an area larger than the area exposed to the position check radiation and to receive irradiation of position check light in a visible region from a position check light irradiation system after receiving the irradiation of the uniform radiation and to form a radiation image. A relative position obtaining system obtains the relation between the irradiating position of the position check radiation and the irradiating position of the position check light on the basis of the radiation image read by the radiation image reading system.

Abstract: An apparatus, method and program storage device are provided for co-registration of multi-modal images in a three-dimensional environment, where the apparatus includes a source of excitation light, an electromagnetic-ray source disposed relative to the source of excitation light, an electromagnetic-ray transparent mirror having a first surface disposed towards the excitation light and a second surface disposed towards the electromagnetic-ray source, a target location disposed towards the first surface of the electromagnetic-ray transparent mirror for locating a target and receiving the excitation light and the electromagnetic rays, an electromagnetic-ray detector disposed on an opposite side of the target location relative to the electromagnetic-ray transparent mirror for detecting electromagnetic-rays transmitted through the target, a second electromagnetic-ray transparent mirror having a light-reflective surface disposed towards the target location, and a light detector disposed towards the light-reflective

Abstract: A light irradiator that includes a light source, a light source supporting device which supports the light source replaceably, a first support device which supports the light source supporting device in such a manner that the position of the light source supporting device can be adjusted in a first direction out of three directions perpendicular to one another, a second support device which supports the first support device in such a manner that the position of the first support device can be adjusted in a second direction out of the three directions, and a third support device which can be mounted removably in a predetermined positional relation to a member to which it is to be mounted, the third support device supporting the second support device in such a manner that the position of the second support device can be adjusted in a third direction out of the three directions.

Abstract: Laser guides for an X-ray device are disclosed in which a pair of laser projecting means are rotatably affixed to any X-ray device, either portable or stationary, such that the beams from the projecting means project toward the X-ray receptor and inward toward a line between the receptor and the X-ray device, and the laser beams cross at a particular location such that when the X-ray device is moved closer to or further from the X-ray receptor the laser beams cross when the X-ray device is at the optimum distance from the X-ray image receptor and the X-ray beam is centered upon the X-ray image receptor.

Abstract: Radiographic imaging device with a radiographic source and a digital radiographic detector, which are movable in their positioning in relation to a patient, and with a control device for movement control and for creating a radiographic image which can be output, with an optical marking device (14) provided at the radiographic source (2) which can be used to mark the height (h1–h2) of the area to be recorded on the patient (P) and the control device (10) being embodied to automatically determine the required height and number of radiographic images to be recorded, where necessary to be joined together for output of an overall image depicting the entire patient area and the recording positions of the radiographic source (2) and of the radiographic detector (3) in relation to the defined height of the patient area.

Abstract: A multileaf collimator (1) of an X-ray diagnostic device has a housing (2) that is provided for the passage of an X-ray beam (S), collimator leaves (3) arranged in said housing for limiting the X-ray beam (S), and a light source (5) and a mirror (4) for identifying the X-ray beam (S) by visible light. A plurality of collimator leaves (3) at a time are arranged in front of the mirror (4) and behind the mirror (4) in the direction of radiation (R) of the X-ray beam (S), and are rigidly coupled together, the individual collimator leaves (3) each being arranged in collimation planes (E1–E14) which are orientated at least approximately normal to the direction of radiation (R) of the X-ray beam (S).

Abstract: The invention concerns a device 5 for aiming an object 1 in an X-ray imaging apparatus 3 provided with a radiographic imaging detector 4, a radiation source 13, and transfer means for moving e.g. the radiation source into different points along a predetermined path P. Said device comprises at least one laser 6 emitting visible light, and e.g. at least two light guides having first ends and second ends, said first ends connected to said laser for receiving said visible light. Each of said second ends 8a, 8b, 8c provides a light beam, and these light beams 7a, 7b, 7c are directed towards said imaging detector with an angle of convergence K. The light beams are adjusted to intersect in a predetermined focus FL point, which is visible and indicates the proper position of the target 2 inside the object.

Abstract: An x-ray apparatus has an exposure unit with an x-ray radiator and a diaphragm in front thereof, and a camera system with which an adjustment image is acquired of a subject positioned in front of an x-ray exposure plane. Using the adjustment image, a region to be examined of the subject is identified and an area of the x-ray exposure plane is selected such that the projection of the region to be examined of the subject is substantially inscribed in the projection of the areal section. The diaphragm is adjusted such that the x-ray radiation generated by the x-ray radiator is incident on the x-ray exposure plane only within the selected areal section.

Abstract: A system includes substantial focus of radiation on a focal area, the focused radiation following a radiation path from a lens to the focal area, and projection of light on a surface so as to substantially indicate an intersection of the radiation path with the surface. In some aspects, the light projected on the surface substantially indicates a distance between the surface and the focal area.

Abstract: An X-ray diagnostic device has an X-ray tube and a diaphragm housing in which diaphragm plates for limiting an X-ray field are contained, as are a lamp and a mirror. The lamp and mirror are configured so that, when the lamp is on, the light therefrom is reflected by the mirror so that the reflected ray field coincides with the hypothetical X-ray field. At least one filter for filtering the X-rays is disposed in the diaphragm housing. The mirror and the filter or filters are attached to a single disk that rotates around an axis such that either the mirror or a filter is within the hypothetical X-ray field.

Abstract: An apparatus for radiographic image acquisition has a radiation source with an associated laser device for representation of a linear light marking on the examination subject to align the subject relative to the radiation source for a subsequent image acquisition. The laser of the laser device is operated pulsed with a pulse-pause ratio of 1:n, with n>1.