Abstract: An X-ray radiographic apparatus for medical use in photographing tomographic images and X-ray penetration images of an examinee. This apparatus has a bed horizontally movably supporting a top board for carrying the examinee, a gantry for X-ray tomography including a first X-ray source revolvable around the examinee and a first X-ray detector for detecting transmitted X-rays, a second X-ray source mounted on a moving mechanism movable on a three-dimensional coordinate system in an examination room accommodating the bed and the gantry, a high voltage unit for supplying an X-ray generating high current to the first X-ray source and the second X-ray source, a switch for selecting a destination of output of the high voltage unit, and a second X-ray detector for detecting transmitted X-rays from the second X-ray source.

Abstract: There is disclosed an assembly for slit radiography with image equalization, comprising a two-dimensional dosimeter for detecting the amount of X-rays transmitted through a body. During a scan different parts of the dosimeter detect the transmitted X-rays. Thereto a system of essentially parallel electrodes is present. The parallel electrodes extend in the direction of scanning and are connected to a control device for forming control signals for the adsorption device.

Abstract: A diagnostic imaging system is comprised of a plurality of linearly adjustable functions and a plurality of binary selectable functions which are controlled by a multi-function joystick controller. The controller has a plurality of function select switches, a joystick, a mushroom cap rotatably engaged on the joystick, a microprocessor, a plurality of switches individually engageable by pivoting the joystick and a pair of switches individually engageable by clockwise or counterclockwise rotation of the mushroom cap. The switches and the microprocessor cooperate such that the selection of a first function select switches causes the operation of the joystick switches and/or mushroom cap switches to be linked to a predetermined first set of imaging system functions. Subsequently, when a second function select switches is selected the joystick switches and mushroom cap switches thereafter operate a predetermined second set of imaging system functions until another function select switch is selected.

Abstract: A CT scanner (10) includes a radiation source (12) mounted for rotation about a scan circle (14). A ring of radiation detectors (30) includes narrow detectors (30.sub.n) and wide detectors (30.sub.w). The narrow and wide detectors are separately sampled (42.sub.n, 42.sub.w) and operated on with different digital filters (50.sub.n, 50.sub.w). The wider detectors have a more limited frequency response (32) which typically includes an out of phase response portion (36); whereas, the output signal from the narrow detetector has a higher frequency response (34), i.e. better resolution. The filters (50.sub.n, 50.sub.w) are selected to yield optimum signal to noise ratio. When the data is merged (60), the resultant data has a modulation transfer function with response (62) which has a higher frequency component or improved resolution relative to response (70) that would be obtained from detectors of uniform width of the average of the narrow and detector widths.

Abstract: There is disclosed an assembly for slit radiography with image equalization, comprising an X-ray source which can scan a body for examination via a slit of a slit diaphragm with a flat, fan-shaped X-ray beam over a scanning path in a direction transverse to the lengthwise direction of the slit for forming an X-ray shadowgraph on an X-ray detector; an absorption device which under the control of control signals can influence the fan-shaped X-ray beam per sector thereof, in order to permit control of the X-ray radiation falling in each sector on the body to be examined; and detection assembly which is designed to detect the quantity of X-ray radiation transmitted by the body instantaneously per sector during a scanning movement of the X-ray beam and to convert it into corresponding signals.

Abstract: Radiology installation comprising a set of instruments between which there is a flow of data signals. For the transmission of these signals, the installation comprises at least two loops between which the data can flow. Each loop is capable of transmitting data which does not flow through another loop. Preferably, there is a main loop and secondary or specialized loops.

Abstract: An X-ray television apparatus applies an X-ray to an object to be inspected, converts the X-ray projection image of the object into an optical image by a fluorescent screen or an X-ray image intensifier, picks up the optical image by a TV camera, displays the video signal obtained by a TV monitor for fluoroscopic monitoring, and records radiograph of the object by using the video signal. Avalanche multiplication is caused on the photoconductive layer of the image pick-up tube of the TV camera so as to enable monitoring or imaging with high sensitivity at a low X-ray dose rate.

Abstract: In a real-time digital radiographic apparatus, an image is picked up by means of a TV camera. In a fluoroscopic monitoring mode, an output of the TV camera is displayed on a display in real time. In a radiographic imaging mode, the output of the TV camera is A/D converted, subjected to a necessary image processing and held as image data for diagnosis. In the fluoroscopic monitoring mode, a beam scanning for an image pickup tube corresponding to an NTSC system is performed whereas in the radiographic imaging mode a high-density and low-speed beam scanning can be selected in which the number of scanning lines is increased and the frame rate is lowered.

Abstract: A digital fluorography apparatus includes an X-ray tube, an X-ray/photo converter, an imaging system, an image processing unit, a display, a comparing unit, a fluorographic control unit, an imaging control unit, and an X-ray tube control unit. The converter opposes the tube to sandwich an object therebetween. An X-ray image formed by the converter is sensed by the imaging system. The image processing unit directly outputs image data sensed by the imaging system in a fluorography mode, and performs predetermined digital image processing of the image data and then outputs the resultant image data in an imaging mode. The image data output from the image processing unit in the fluorography mode is compared with reference data by the comparing unit, and a fluorographic control signal corresponding to the comparison result is generated from the fluorographic control unit. The imaging control unit generates an imaging control signal corresponding to the control data from the fluorographic control unit.

Abstract: An X-ray diagnostic apparatus has two modes, i.e., a fluoroscopy mode for displaying an X-ray fluoroscopic image, and a radiography mode which is selected in response to a radiography instruction in the fluoroscopy mode, for recording an X-ray radiographic image. X-ray fluoroscopic image data obtained by an X-ray image detector in the fluoroscopy mode is converted to a digital image signal by an A/D converter. At least a plurality of frames of digital image signals of X-ray fluoroscopic images corresponding to a period which includes an input timing of the radiography instruction are continuously stored in a fluoroscopic image memory section.

Abstract: Method and apparatus for the production of fluoroscopic and radiographic x-ray images utilizing a portable hand-held and battery operated x-ray system. The system incorporates a unique high voltage power supply of diminutive size and weight which may be disposed totally within the hand-held system. By utilizing the system in conjunction with a currently available hand operated instant Polaroid film developer, the system provides total portability and field operability in both fluoroscopic and radiographic mode.

Abstract: An x-ray diagnostics installation has motor-actuatable adjustable supports for various components which are operated by signals from a central control computer to selectively position the components with respect to an examination subject. The central control computer has an input connected to a microphone through a voice processor so that voice commands can be used to initiate and stop positioning of the components in various directions. The central control computer is also connected to a display through a graphics processor, so that the relative positions of all of the components and the examination subject can be visually presented.

Abstract: The invention relates to an X-ray generator including a controller for the dose rate. In order to enable universal use of this controller for different types of examination, use is made of a sampling controller in the form of a microprocessor system. There are provided memories in which the sampling frequency and the adjustment functions are stored for the various types of examination as well as the programs on the basis of which the sampling controller calculates the adjustment values for the various types of examination.

Abstract: The method of adjustment of an x-ray device involves a step of entry of data relating to images to be produced and of data relating to the x-ray tube to be employed, a step of computation of x-ray tube parameters and a step of adjustment of the parameters in accordance with these computations. The number of images to be produced is included in the entry of image data and performs a major role in the optimization of computation of adjustment parameters with a view to ensuring that the image-recording time is as short as possible, thereby avoiding the problem of motional blur.

Abstract: An operator console for an X-ray tomograph, has a variety of switches sequentially actuatable for scanning operation of the X-ray tomograph. Each switch is provided with an indicator means for indicating a controllable condition to give the operator a switch operating procedure, and also with an indicator means for indicating a selected condition to allow the operator to know a current setting at a glance. The number of operating steps for routine scanning operation can be reduced by providing capability for presetting scanning parameters for respective body areas to be scanned. The operator console can easily be operated without any errors even by a novice operator.

Abstract: A radiation image inspection apparatus for inspecting articles. The inspection apparatus includes a radiation source which generates and directs radiation, preferably x-rays, toward and around the article. The radiation penetrates and passes around the article and strikes a screen having a coating formed of a rare earth element. The coating exhibits fluorescence when struck by incident radiation and becomes illuminated, generating a first light image of the article. The first light image passes through a plurality of lenses which maintain the intensity of the light image before striking a camera having a front camera screen. The camera by means of an internal sweep beam scans the camera screen and generates an electrical output signal corresponding to the image on the camera screen. A controller controls the operation of the camera and radiation source in either of two modes.

Abstract: Digital radiography apparatus uses a resonance-type high frequency inverter having a main switch in series with an auxiliary switch. An X-ray tube receives the pulsed power from the high frequency inverter, after voltage ampliflication and rectification, emitting pulsed X-rays to a patient. A TV camera obtains X-ray transmission images of the patient, and an image processor generates a visual diagnostic image by subtracting one X-ray transmission image from another. The high frequency inverter circuit is controlled synchronously with the processing operation of the image processor.

Abstract: A voltage signal proportional to the brightness of an x-ray image is derived. In a mA loop the ratio of a reference voltage to brightness is determined. If the brightness ratio does not equal 1 it causes the x-ray tube current controller to adjust current (mA) to eliminate the error. A command proportionate to the ratio is stored until the next image frame. In a kV loop a ratio of the last mA command and a set limit for mA is taken. This error ratio is multiplied by the brightness ratio to provide a kV control ratio indicative of how much of the brightness error the kV loop is obliged to correct. The kV control ratio is corrected for nonlinearity between kV change and brightness change and the resulting command is used to adjust the kV applied to the x-ray tube anode.

Abstract: An X-ray imaging system which enables recording of an X-ray image of an object at a desired time without substantial delay while fluoroscopically observing the X-ray image with the eye, and in which the filament current of the X-ray tube is kept at a constant level at all times, and the tube voltage is supplied in synchronism with the vertical scanning of a TV camera in the form of pulses, the width of which is changed depending upon whether the X-ray image is fluoroscopically observed with the eye or a picture thereof is radiographically recorded.

Abstract: The invention concerns a dental X-ray diagnostic unit for panoramic planigraphy, with a radiation source, an X-ray film cassette that is moved during the exposure in relation to the radiation source, with an adjusting mechanism to move the radiation source and the cassette around the object, and with a slit stop located in the radiation path between the radiation source and the cassette. For a given exposure process, the time sequence of the dosage from the radiation source can be predetermined by a control apparatus.

Abstract: Disclosed is automated setting of x-ray technic factors (e.g., KV, MA and exposure time) on the basis of (a) automated determination of the thickness of the body part to be imaged by a non-contact ranging system, (b) push button selection for the type of examination, and (c) push button selection for the type of body physique. The automatically determined technic factors and/or thickness are displayed to allow for manual override, and other failsafe features are provided as well. For better results, the ranging transducer is in the path of, and aligned with the axis of, the x-ray beam while producing ranging information, but is out of the x-ray beam path for the actual x-ray examination. An interlock is provided so that the x-ray beam is not on when the ranging transducer is in the beam path.

Abstract: An exemplary embodiment includes x-ray apparatus and auxiliary apparatus, such as a sheet film camera or an image intensifier television chain, as well as comprising operating consoles for generator and apparatus control. The operating consoles are intelligent data display apparatus which are connected to a central computer unit which controls the x-ray generator and the x-ray apparatus and which effects the display of data of the x-ray diagnostic system on the data display apparatus. The data display apparatus are provided with a matrix arrangement for the purpose of data input through manual contacting of the display screen at a location corresponding to a desired input.

Abstract: In an X-ray photograph unit of the type which controls an X-ray projection on the basis of a tube voltage, a tube current and an exposure time, this invention relates to an X-ray photograph unit including photograph portion switches disposed so as to correspond to portions of the human body to be photographed and which set primarily and automatically the tube voltage and the tube current, and thickness switches disposed so as to correspond to the thickness of the portions to be photographed and setting automatically the exposure time in combination with said photograph portion switches, wherein the selection of said photograph portion switches and said thickness switches along makes it possible to carry out the X-ray projection.