Abstract: A radiological system includes an image pick-up chain which includes an image processor having at an N-output, at which images having a number of lines which is standard, and an H-output for an H-image having a higher number of lines than the standard image. A video recorder is connectable to the N-output, an H-image playback unit is connectable to the H-output. The video recorder is in the image transmission chain, and has an output connected through an up-scan standards converter to a switch, by means of which the H-image playback unit can be connected to an output of the up-scan standards converter.

Abstract: An x-ray diagnostics installation has an x-ray image intensifier video chain which includes a semiconductor detector composed of pixels arranged in a matrix, serving as the video pick-up and a detector for identifying the average image brightness at the output luminescence screen of the x-ray image intensifier within a predetermined image region. A first read-out circuit is provided for pixels of a first group in the image, which is operated with a read-out clock at a first frequency, and a second read-out circuit is provided for pixels of a second group distributed over the area of the semiconductor detector, which is operated with a read-out clock at a second frequency. The second frequency is higher than the first frequency. The output signals of the pixels of the second group are supplied to an evaluation circuit, and the output signals of the first group of pixels are supplied to the video chain.

Abstract: A radiological system, wherein x-ray images (radiation images) are produced and are converted, through a video chain, for display as a video image, the system having a modulation transfer function, has the capability of influencing the modulation transfer function dependent on ambient light which is present at the display. To that end, a control unit is provided which provides two-dimensional control of the modulation transfer function dependent on illumination which is present in the environment of the display. The control is effected by means of a two-dimensional spatial frequency filter.

Abstract: A telerecording system for producing x-ray images, having an x-ray image intensifier video chain which includes a semiconductor image converter, has a detector which recognizes blooming in the semiconductor image converter and which given blooming, causes at least two x-ray images of different brightness to be acquired by the semiconductor image converter. One of the images is exposed attenuated in comparison to the other so that no blooming ensues. Image signals from the two x-ray images are then superimposed in a mixer unit and the resulting image is displayed.

Abstract: In a radiological installation comprising an image pick-up system having a memory for individual images and having an image playback unit, an overall image formed of at least two individual images is capable of being portrayed, the number of lines thereof being at least largely independent of the sum of the number of lines of the individual images. For that purpose, the overall image is compiled line-by-line with a processor controller such that respectively one row of stored picture elements of an individual image forms a section of one line of the overall image, and a corresponding row of stored picture elements of at least one further individual image respectively adjoins this section.

Abstract: A video processing system, of the type used for portraying x-ray images, has a filter circuit with a spatial-frequency high-pass filter characteristic, the filter circuit including an amplitude-dependent separating filter having outputs to which respective spatial-frequency high-pass filters having different limit frequencies and/or having different kernel sizes are connected. The spatial-frequency high-pass filters are connected to the output of the overall filter circuit through an addition unit, so that the respective outputs of the spatial-frequency high-pass filters can be combined in different amounts to form the output of the overall filter circuit.

Abstract: An x-ray diagnostics installation has a primary radiation diaphragm disposed in the beam path of an x-ray tube, with the x-rays attenuated by an examination subject being processed through an image intensifier video chain, which includes an image memory. The primary radiation diaphragm is provided with sensors which generate an electrical signal corresponding to the position of the individual diaphragm components of the primary radiation diaphragm, these signals being supplied to a processing stage in the image intensifier video chain. The processing stage acts on the data stored in the image memory so that the effect of the diaphragm can be simulated, and included in the displayed image. The processing stage includes a control computer connected to the sensors, and a simulation circuit for simulating the effect of the primary radiation diaphragm.

Abstract: An x-ray diagnostics installation has an x-ray tube and an image processing and display system which includes a video camera connected to the x-ray image intensifier, an image memory, a spatial frequency filter and a monitor. A motion detector is connected to the image memory and to the video camera and controls operation of the spatial frequency filter to vary the filter effect so that the filter effect is greater in transillumination image regions having little motion than in regions having a higher amount of motion.

Abstract: X-ray diagnostic apparatus is disclosed which includes a video camera; at least one image memory (12); one subtraction stage (13) for producing subtraction images by forming the difference from a stored video signal and a video signal chronologically following the stored video signal; an evaluation circuit (14 to 21) for evaluating the time of the difference signal; and a color video monitor (7). The evaluation circuit (14 to 21) contains a time stage (15) and a color converter (14). The color converter (14) is directly coupled to the subtraction stage (13) and converts the subtraction image into a black and white (monochrome) intensity image whose image color is controlled by the time stage (15) in dependence upon the chronological occurrence of the subtraction image. The color converter (14) has one output for each of the primary colors (red, green, blue). One memory (16 to 18) is coupled to each of these outputs for the storing of the output signals of the color converter (14) by summation.

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: An x-ray diagnostic installation has a video display system connected to the output of an x-ray image intensifier, the video system including a subtraction stage with a weighting circuit connected to an image memory for suppressing image noise the subtraction stage also having a difference forming element for subtracting image information arising at different times. The output of the difference forming stage is supplied to a threshold circuit and the output of the threshold circuit is read into another image memory picture element-by-picture element. This memory is connected to the weighting circuit such that the output thereof controls the parameters of the weighting circuit picture element-by-picture element. A filter circuit may be interconnected between the output of this memory and the weighting circuit.

Abstract: For angiographic X-ray examinations with an image intensifier-television installation, three image memories are connected to a control generator which in respective clock pulse intervals cyclically places a respective one of the image memories in the write state for the purpose of storage of a current video signal which is averaged over several images. A subtraction device for the subtraction of image data occurring at various times receives the current video signal and the output signal of the one image memory in the write state. Connected to the subtraction device is a maximum detector which recognizes the maximum of the contrast medium flow and in response thereto actuates the control generator to cause the image memory which was last in the write state, and the image memory with the chronologically oldest video signal to be switched to the read state and to produce a difference signal for display on a video display based on the readout from such image memories.

Abstract: The invention relates to a radiodiagnostic system with an x-ray tube, flat picture intensifier, a coupled television camera system, a central unit and a monitor, wherein an image storage panel is connected to the television camera system and to the monitor and is coupled by its clock input with the central unit. At the central unit setting means are provided which act on the central unit in such a way that the vertical-to-horizontal frequency ratio of the television camera system is reduced by a factor N, the ratio of the image element clock frequency of the image storage panel to the horizontal frequency is increased by the same factor N, and the read-in process into the image storage panel is delayable in row and/or column direction, so that only a selectable image detail is displayable on the monitor.

Abstract: A device for taking pictures with a monitor, a lens, a mirror that can be moved within the path of the rays of the monitor and a film camera located in one of the ray paths that can be selected by the mirror. A transparent holder for a sheet film is attached to the housing and located in the other path. A photo-electric converter, positioned on this holder, follows the path of the rays. By means of the control switch, the monitor can be controlled so that a light dot is generated on the screen of the monitor and reproduced on the sheet film.

Abstract: An exemplary embodiment comprises an image intensifier television chain, a subtraction device which has at least one image memory and a difference stage for providing subtraction images through difference formation from the stored video signals and chronologically displaced video signals, and a monitor. There is series connected with the subtraction device a circuit with a high-pass filter characteristic for the purpose of two-dimensional spatial frequency filtering.

Abstract: An exemplary embodiment includes a number of x-ray soures which are capable of being individually switched on in succession by means of a control generator, a patient support, an x-ray image intensifier which is surrounded by deflection coils which are connected with a deflection device, connected to the control generator, for the synchronous movement of the electron image in the x-ray image intensifier, a video camera which is aligned with the outlet fluorescent screen of the x-ray image intensifier, an image storage and a monitor, wherein the image storage is so designed that at least two groups of different individual images, superimposed, respectively, are capable of being stored. The control inputs of the image storage for the purpose of group-wise storage, are connected with the control generator.

Abstract: The disclosure proceeds from the fact that, even in the case of the most painstaking selection of the hardness of X-rays employed for the purpose of irradiation of heterogenously composed specimens, such as, for example, body parts interspersed with bones, no video image which is entirely satisfactory in all parts is obtained. An image is desirable in which the fine contrasts of soft parts appear just as clearly as those of parts which, such as bones, for example, strongly absorb X-rays. To this end the disclosure provides that image signals, which are generated with X-rays of various hardnesses; for example, such of more than 100 kV and such of less than 60 kV, be stored, and that therefrom the respectively favorably represented surface elements be joined together to form a resultant image. The disclosed embodiment is particularly suited for use in medical X-ray diagnostics.

Abstract: An exemplary embodiment has the purpose of representation of margins of organs, and comprises a television pickup system, a first image memory, a difference stage for providing subtraction images through difference formation from the stored and the current video signal, and a monitor. Connected with the output of the difference stage is an adder which is connected with a second image memory whose output signal is supplied to the adder so that, in the second image memory, the image point data of the difference stage is summed up. The output signal of the second image memory is supplied to the monitor. The circuit disposed between the first image memory and the adder is so designed that it forms the absolute values (.vertline.A.vertline.) of the image point data from the difference stage.

Abstract: An exemplary embodiment includes an x-ray generator, an x-ray tube, and an x-ray image intensifier television chain, which comprises an x-ray image intensifier, an optical coupling member, a television pick-up tube of the vidicon type, a video amplifier, a regulating installation for the illumination level of the television pick-up tube, a control device for the control of the functional sequences and for the generation of the synchronous clock pulse frequencies, a deflection and focusing unit, and a video monitor. The control device is so designed that through the latter the regulating installation is capable of being switched over to a higher setpoint value; the deflection and focusing unit, to an operation for scanning with reduced frequency; and the x-ray generator to pulse operation with an increased dose rate.

Abstract: An exemplary embodiment includes at least one x-ray tube for the generation of an x-ray beam, a patient support, an image detector, and a control generator--connected with the x-ray tube and the image detector--for the purpose of moving the x-ray beam, and in opposition thereto, the image field of the image detector. There is connected to the control generator a layer height computer which calculates the enlargement from the geometric data for the tomogram. The image detector has a circuit--connected with the layer height computer--for the purpose of fading-in a marking for the dimensions in the layer plane.