Abstract: In an x-ray fluoroscopic imaging system including a portable cabinet, at least one monitor, a support arm, an articulated arm assembly connecting the support arm to the cabinet, a C-arm carried by the support arm assembly, an x-ray source and detector located at opposing locations on the C-arm, and a control panel mounted on the source or the detector, three “x-ray on” lighted indicators are disposed at visible locations in the system, one of these indicators being a switch with a light-up perimeter on the control panel, the second being incorporated in the monitor, and the third being incorporated in the cabinet.

Abstract: The present invention, in one form, includes methods and apparatus for reducing the x-ray dosage to a patient in a medical imaging system. In accordance with one embodiment of the present invention, a switching unit, or circuit, is coupled to a x-ray tube and a power supply to control the emission of x-ray beams from the x-ray tube. The switching unit is configured to alter a voltage and current signal applied to the x-ray tube control grid so that the magnitude of the x-ray beams is modified, or altered. By utilizing the switching unit the patient x-ray dosage is reduced and the magnitude of the x-ray beams may be configured to match the requirements of the application.

Abstract: A portable X-ray unit, of a relatively light-weight, occoping a volume of less then one-half a cubic foot containing an x-ray head assembly, a unique Marx generator, a plurality of spark-gap switches and control electronics is disclosed. The Marx generator allows for the development of a relatively high voltage in excess of 100 kV, yet allows for the discharge thereof within the nanosecond range. The Marx generator is enclosed by an acrylic insulator that cooperates with an aluminum enclosure, which functions as a return current path for the capacitors in the Marx generator and also as a shield against the escape of electromagnetic radiation from the pulsed x-ray unit. The Marx generator and spark-gap switches are confined within the pressurized chamber that may contain nitrogen gas to reduce the separation of the gap in the spark-gap switches.

Abstract: An improved x-ray analyzer may be portable to permit on-site or outdoor analysis without the possibility of emitting harmful x-rays. A housing of the analyzer contains an x-ray generation system for generating x-rays and irradiating the x-rays onto a sample under analysis, an x-ray detection system for detecting x-rays emitted by the sample in response to irradiation of the sample by x-rays by the x-ray generation system, and a safety mechanism for permitting x-rays to be emitted from the housing only when a sample is under analysis. A normally-closed shutter is disposed between the x-ray generation system and a measurement window mounted to the housing through which x-rays are emitted. The safety mechanism includes a first switch which permits the shutter to be opened only when the housing is in contact with a sample under analysis so as to prevent the emission of x-rays from the housing when the housing is not in contact with a sample under analysis.

Abstract: A portable x-ray system includes an x-ray source, an internal power supply for supplying an input voltage, and a voltage converter in electrical connection between the power supply and the source. The converter varies the input voltage from the power supply to provide an output voltage useable in the x-ray source to generate x-rays of a predetermined energy. The power supply includes a battery power store, a capacitor power store, and a switching unit to selectively connect the power stores to the voltage converter individually or together to provide the input voltage to the voltage converter during an exposure.

Abstract: Control apparatus is provided for a medical diagnostic imaging system, such as a mobile X-ray unit. The imaging system includes a battery or like power storage device of limited capacity, and a number of components disposed to perform respective corresponding functions. The control apparatus includes a user interface for enabling an operator to generate commands which selectively direct the components to perform their respective corresponding functions. The control apparatus further includes a system control means, comprising a controller and set of control circuits, for initially placing the imaging system in a powered-up mode, wherein each component is coupled to receive power from the battery. A sleep mode activation device is included in the system control for decoupling a first set of components from the battery, while allowing a second set of components to remain coupled thereto, following a first time period during which no command is generated by the user interface.

Abstract: A universal radiographic/fluoroscopic "room" is constructed according to the present invention by combining a versatile group of X-ray examination system components, electrical and mechanical drive components, and sensing components, under the supervision of a flexible control system, to form a universal diagnostic medical imaging system capable of performing radiographic, fluoroscopic, tomographic, and stepped examinations in several different operator-selectable configurations. The operator selects any available operating mode, including auto-bucky, auto-wall, auto-table, auto-table/wall, servo-tomo, conventional stepping, stepped-digital, auto-step, and auto-step-center modes, using a a control panel. The control system automatically determines which system components are required to perform that type of examination, moves the components into operational or storage positions as required, and prepares each component for operation. The operator need not manually reconfigure the equipment.

Abstract: A computer tomography apparatus of the present invention can select one of an ON state in which X-ray radiation is performed to continuously acquire projection data and an OFF state in which acquisition of projection data is stopped, and even in the OFF state, rotation of an X-ray tube is continued, thus allowing quick switching from the OFF state to the ON state.

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: A slider is associated with a carrier for transferring a vehicle body through a magnet and an air cylinder. An amount or a distance of movement of the slider transferred together with movement of the carrier is detected with a rotary encoder and it is computed as an amount or a distance of movement of the carrier. When the carrier is transferred in a predetermined amount or distance, an image of the vehicle body is fetched by an investigating robot. The fetching does not undergo any adverse influence due to a deviation of the position of the investigating robot relative to the position of the carrier.

Abstract: X-ray penetration images picked up by an X-ray penetrating device are supplied to an image processor, and stored in a magnetic disk unit as radiographic image data. The radiographic image data are reproduced on a reproduced image display monitor installed in an examination room. The examination room further includes a fluoroscopic image display monitor for selectively displaying the fluoroscopic images and menus. The menus include functions to select radiographic image data for reproduction on the reproduced image display monitor and to select a display mode. The functions shown on the menus may be selected and instructed by operating a joystick. During a procedure of interventional radiology, an operator operates the joystick to select and instruct desired radiographic image data to be reproduced. A display mode for enlarging reproduced images may be selected as necessary.

Abstract: A video processing system includes a plurality of identical video switch modules (A). Each of the video switch modules has matching inputs and outputs such that received signals can be passed through unchanged, enabling the modules to be connected in a daisy chain or series relationship. Each of the modules further includes inputs and outputs for receiving video signals from and sending video signals to procedure rooms (B). Preferably, each of the procedure rooms includes medical diagnostic apparatus (10-18) which produce one or more unprocessed video signals, a first video monitor (22) for displaying first processed video signals, a second monitor (24) for displaying second processed video signals, and a VCR (20) for recording and playing back second processed video signals. The daisy chain of video switch modules is interconnected at one end with a shared digital image processing system (C).

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: Discrete, contained charged particle bundles are converted into heat energy for driving a load. In one embodiment the bundles propagate between a cathode and anode in a gap between a pair of solid dielectric members, which gap has a dimension between a pair of facing surfaces of the dielectric members equal approximately to the diameter of a group of such bundles propagating together. The bundles are derived in response to high voltage short duration pulses derived from a modified Blumlein switch. The bundles are periodically derived and converted to current that flows in a circuit having a resonant frequency equal to the frequency of the bundles. In another embodiment the bundles are derived from a cathode including a liquid metal pool in contact with a solid dielectric surface along which the bundles propagate to an x-ray emitting target or an anode that is heated by the bundles, to convert the x-rays into useful emission and/or the heat into useful work.

Abstract: An electromagnetic remote control exposure system including a receiver and transmitter for excitation of a mobile X-ray unit having a rotating anode X-ray tube and exposure mechanism. The transmitter of the remote control is adapted to transmit by a single switch, a first signal to initiate the rotation of the anode and a second signal for the initiation of the actual X-ray exposure. The receiver is provided with a time out delay which causes the X-ray unit to return to the standby mode if the second signal is not received within a predetermined interval of time after receipt of the first signal. The system will also return the X-ray unit to the standby mode if the second signal is interrupted before the exposure has been completed.

Abstract: A real-time digital radiography system operates to introduce a X-ray image on a real-time basis and process the image for clinical diagnosis. The system provides for additional inputs, for example, clinical information material, which are also subject to digital image conversion. The system is designed to connect several TV cameras to an A/D converter which digitally converts the produced image to digital information, with one of the TV cameras for imaging the output image of an X-ray image intensifier, and the output of the one TV camera is selectively connected to the A/D converter. The output image of the X-ray image intensifier and other output images produced by separate TV cameras are connected to the A/D converter through a switching apparatus, and subsequently the digital output is processed.

Abstract: An X-ray generator for operating an X-ray tube having parts of the tube connected to ground includes a high-voltage transformer arrangement having distinct secondary windings for producing positive and negative high voltages, for the anode and the cathode, respectively, of the X-ray tube. The unfavorable voltage distribution inherent in the feeding of such an X-ray tube by a high-ohmic generator is removed in a simple manner in that the secondary windings are each associated with a primary winding and that in series with the primary winding for producing the anode voltage an inductance is connected by means of a switching device.

Abstract: A head-activated fluoroscopic control which is characterized in a preferred embodiment by a continuous wave infrared transmitter located in a cartridge adapted for attachment to eyeglasses, a headband or other headpiece worn by a surgeon or attending physician and a detector or receiver tuned to the frequency of the continuous wave infrared transmitter for receiving a partially collimated infrared signal beam and activating a fluoroscope. The infrared transmitter emits the collimated beam and the beam is received by the receiver when the surgeon's head is turned toward the fluoroscope monitor upon which the receiver rests or in which the receiver is mounted, to facilitate selective operation of the fluoroscope during surgery.

Abstract: A pulsed precision x-ray source includes a miniaturized internally self-shielding x-ray tube and an integral generator contained in a hand-held housing for generating timed bursts of x-ray having regulated energy level. A control grid and focus electrode within the tube enable precise on-off control of an electron beam directed to an x-ray emitting anode. The integral generator system includes an elongated, U-shaped unitary, molded plastic block mounted in the housing and includes a high voltage transformer having primary and secondary annular windings encased in a transformer portion of the block defining a central opening outside of the block for receiving a transformer core therethrough and, a capacitor-diode voltage multiplier stack connected to the secondary winding and having a positive node connectable to the anode and a negative node connectable to the cathode.

Abstract: In a voltage generating system for an X-ray diagnosis apparatus, a smoothing filter is arranged between a rectifying circuit connected to an AC power source and a smoothing capacitor. In the smoothing filter, by a switching operation for a current from the rectifying circuit, a power source voltage and a current are of in-phase, and harmonic components included in the current can be eliminated. When a current limiting circuit and a smoothing capacitor are used in place of the smoothing filter, a voltage supplied to a DC-DC converter is set to be constant.

Abstract: An apparatus and method is disclosed for preventing accidental overradiation of a patient in surgical procedures involving both fluoroscopy and endoscopy. Video outputs from the fluoroscope and endoscope are connected to a switching device. The physician uses the switching device to select from between the endoscope video output and the fluoroscope video output for viewing on a video monitor. When the endoscope video output is selected for viewing, the switching device automatically deactivates the X-ray generator of the fluoroscope. When the switching device is actuated to select the fluoroscope video signal for viewing on the monitor, the switching device automatically reactivates the X-ray generator. In this manner, overradiation of the patient during periods when the fluoroscope is not being used is avoided.

Abstract: A head-activated fluoroscopic control which is characterized in a preferred embodiment by a continuous wave infrared transmitter located in a cartridge adapted for attachment to eyeglasses, a headband or other headpiece worn by a surgeon or attending physician and a detector or receiver tuned to the frequency of the continuous wave infrared transmitter for receiving a partially collimated infrared signal beam and activating a fluoroscope. The infrared transmitter emits the collimated beam and the beam is received by the receiver when the surgeon's head is turned toward the fluoroscope monitor upon which the receiver rests or in which the receiver is mounted, to facilitate selective operation of the fluoroscope during surgery.

Abstract: A collision preventive device for medical equipment (such as readiotherapy equipment) having moving parts to which accessaries are disengageably attached includes a contact detection circuit in which the normally closed contact detector switches disposed on the moving part and on the accessary are all coupled in series, so that an occurrence of contact of the moving part or of the accessary attached thereto can be detected by a relay coupled across a current source in series with the contact detector switches.

Abstract: The tube current in an X-ray tube is controlled by a closed loop control circuit in which a tube current feedback signal is used to control X-ray tube filament current. The gain of the feedback loop is maintained substantially constant over a wide range of tube currents by inserting a signal proportional to the reciprocal of the tube current command.

Abstract: An anode driving apparatus of a rotating anode X-ray tube includes a power source transformer connected to an AC power source, first and second taps, located at the secondary winding of the power source transformer, for outputting first and second AC voltages having the same phase, first and second switching elements respectively connected to the first and second taps and each made up of a solid state relay (SSR), an AC motor having a common terminal commonly connected to the first and second switching elements, a main terminal connected to a 0-voltage terminal of the power source transformer, and a subterminal connected to the 0-voltage terminal of the power source transformer via a phase shift capacitor, and a switching controller for turning on/off the first and second switching controller sequentially and continuously turns on the first and second switching elements, and sequentially applies the first and second AC voltages to the common terminal of the AC motor.

Abstract: A nuclear medical diagnostic apparatus detects and displays a radiation emitted from a local area of a body being examined after a radioisotope has been given to the body. The nuclear medical diagnostic apparatus has a function for automatically stopping the display of the detected radiation under certain conditions.

Abstract: An x-ray tube contains a plurality of filaments each with an associated focus cup control to allow it to change rapidly between discrete emission intensities. The cathode structure of the x-ray tube is constructed so that each filament is located in a separate focus cup structure. However, the focus cup structures are electrically isolated so that a separate bias potential can be applied to each focus cup structure. By separately biasing each focus cup structure, the emission from each of the filaments can be controlled independently.

Abstract: An X-ray tube having two individually energizable cathode filaments. If a primary filament is shorted to a cathode cup, a switch mounted inside the tube housing is thrown to couple a second filament to a filament energization signal. This avoids the necessity in replacing the X-ray tube if the primary filament is shorted and lengthens the effective life of the X-ray tube.

Abstract: A power supply circuit of voltage resonance type for supplying a high DC voltage to an X-ray tube includes a transformer, a capacitor for forming a resonance circuit in cooperation with a primary winding of the transformer, and a rectifier circuit coupled with a secondary winding of the transformer for supplying a high DC voltage to the x-ray tube. At the beginning of the operation of the power supply circuit, a great change of resonance conditions is offset to quicken the rise of the X-ray tube voltage. To this end, a power supply drive circuit to enable (turn on) the switches is arranged to prevent the switches from being enabled before one cycle of the resonance current in the resonance circuit is completed.

Abstract: An X-ray generator system has first and second switching devices such as transistors which are complementarily turned on and off to intermittently apply a DC voltage to the primary winding of a transformer for thereby inducing a high voltage across secondary windings of the transformer for enabling an X-ray tube to emit X-rays. The X-ray generator has a control mode in which the first and second switching devices are simultaneously turned on immediately before they start being complementarily turned on and off, for allowing the high voltage to have a sharply rising positive-going edge.

Abstract: The present invention is directed to an X-ray diagnostics installation having control elements for control of specific components of the installation. In order to prevent inadvertent actuation of the elements, an activation switch must be actuated to cause each of the control elements to be effective for a predetermined time. The length of the predetermined time can be increased by actuation of one of the control elements following the actuation of the activation switch.

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: The present invention provides a CAT (computerized axial tomography) scanner in which x-ray detector output currents are utilized efficiently and can be measured correctly, and which reconstructs an image of an object (11) under scrutiny without being materially affected by variations in the intensity of x-rays. The scanner has an x-ray tube (1) for continuously producing x-rays, which are directed toward an array (2) of x-ray detectors through the object (11). Capacitors (3.sub.1 -3.sub.502) are charged by the output currents from the x-ray detectors (2.sub.1 -2.sub.502) of the array. A control circuit controls first switches (4.sub.1 -4.sub.502) and a second switch (6) in such a way that each capacitor initiates a cyclic process immediately after the previous capacitor is fully discharged. The cyclic process consists of a measurement, a resetting, and a charging.

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: The anode and cathode of an X-ray tube are connected to a high-voltage power source respectively, through corresponding tetrode tubes, and the center metal electrode of the X-ray tube is grounded. The tetrode tubes are simultaneously turned on and off upon receipt of a control signal. An abnormal current, which flows through the center metal electrode due to a short-circuiting fault of the tetrode tube connected to the cathode of the X-ray tube, is detected during an OFF period of the tetrode tubes. Upon detection of the abnormal current, the tetrode tube connected to the anode of the X-ray tube is forcedly turned on, thus preventing the fusion of the center metal electrode in the X-ray tube.

Abstract: A switch mechanism for an image intensifier hood in an x-ray diagnostics system is connected to a motor for moving the x-ray image intensifier toward and away from an examination subject. If the hood inadvertently comes into contact with the examination subject or a technician, the hood is displaced thereby actuating the switch mechanism and disengaging the motor to stop movement of the x-ray image intensifier, thereby avoiding injury to the examination subject and technician and avoiding damage to the x-ray image intensifier. The switch mechanism is constructed such that actuation thereof occurs upon the presence of forces acting on the hood in the direction of the luminescent screen surface or a direction perpendicular thereto, and each intermediate direction.

Abstract: A circuit for operating an X-ray tube, such as in a medical diagnostics apparatus, is connected with a high-voltage generator and a switch mechanism for connecting and disconnecting the X-ray tube to the high-voltage generator. A resistor is disposed in a circuit branch which can be connected in parallel across the X-ray tube by a switch controlled by the aforementioned switch mechanism. If the X-ray tube is disconnected from the power source, the switch closes the circuit branch and causes the resistor to be connected across the X-ray tube. As a result, the X-ray tube voltage decreases relatively quickly after the high-voltage is disconnected. The resistor across the X-ray tube may be a variable resistor, such as a high-voltage triode.

Abstract: The invention relates to a supply circuit for an X-ray emitter usable in radiology. The circuit has a transformer, whereof the primary is connected to the three-phase power supply and whereof the secondary is connected to the X-ray emitter. The primary circuit is put into operation by the closing of a controlled switch. This switch has a set of closing thyristors. The switch also has a correctly charged capacitor connectable to the set of thyristors. For opening the circuit, the capacitor is connected in such a way that it supplies a reverse current to the thyristors of the set of thyristors. Thus the capacitor is recharged with the reverse polarity. During a following closing - opening sequence of the switch, the terminals of the capacitor are connected to the set of thyristors by switching their connection. In this way, the capacitor is always correctly connected for fulfilling its function during the blocking of the thyristors.

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 tube having a capability to produce multiple anode spots. The X-ray tube can produce three or more different size anode focal spots without modification of the connectors, cabling, or high voltage supply for routing high voltage signals to the X-ray tube. An isolating fiber optic control input connects an external light emitting diode to a controller inside the tube housing. The controller responds to light signals from the light emitting diode to control the size of focus spots on the tube anode. In a preferred embodiment each of three filaments are individually energized to produce three different size focal spots and a cathode cup to which the filaments are mounted is also biased to add a four spot capability. In an alternate embodiment a split or segmented cathode cup has its segments biased to different electrical potentials by tapping power from a conventional high voltage filament supply used in energizing a cathode filament.

Abstract: A control system for the x-ray tube high voltage supply in an x-ray diagnostic installation has a switching device for switching between two circuits for providing an actual value to the high voltage generator for regulating the output thereof. The first circuit determines an actual value from a voltage divider connected to two high voltage generators in series. The other circuit includes radiation detectors, one of which may be filtered, which provide an indication of the radiation quality and are used to modulate an incoming actual value signal. Operation of the switching device is controlled by a ramp generator such that in the range of lower x-ray tube high voltages, which occur immediately after switching on the x-ray tube, control is undertaken on the basis of the actual value of the x-ray tube high voltage through the voltage divider, and upon the attainment of a higher x-ray tube high voltage a switch over occurs such that control of the high voltage is effected by the radiation-detecting circuit.

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: In X-ray tubes comprising a metal grid, it may occur that the necessary emission current cannot be reached in unfavorable circumstances. This situation is improved by the invention in that the high voltage for the X-ray tube is derived from at least three series connected high voltage generators, the first and the second generator being connected to the anode and the cathode, respectively, of the X-ray tube while the third generator can be connected either to the anode side (in the case of high tube voltages) or to the cathode side (in the case of low tube voltage) by means of a switching device.

Abstract: A masking apparatus and palpitator cone drive system for an X-ray spotfilming device. The masking apparatus comprises first and second pairs of shutter-like members mounted for reciprocating movement in two mutually orthogonal directions. Each mask member of the second pair includes first and second relatively moveable elements that operate in a telescope-like manner. A drive system including a reversible motor and a feedback potentiometer actuates the elements at first and second speeds so that the elements reach their retracted and extended positions simultaneously. The cone drive system includes a drive motor, a drive belt and drive assembly for driving the cone between retracted and operative positions. A cone lock is engageable with a keeper located at a cone-advanced position of the drive assembly and is released by the drive belt whenever the drive motor is energized in the cone-retracting direction.

Abstract: In an exemplary embodiment, a portion of the tube vacuum envelope is disposed between the rotor and stator of the anode drive motor. Taking into account the required high voltage safety, hitherto concessions as to the anode drive had to be made. The disclosure provides an improvement in this regard in that the anode and stator are connected to the same potential until a desired rotational frequency is attained. Only then, subsequent to disconnection of the drive voltage, is the radiography voltage applied for the necessary exposure period. If necessary, subsequently a braking voltage, or again a drive voltage, respectively, can be applied to the stator. Methods and installations in which, in accordance with the disclosure, the drive of the rotary anode is intensified, are, in particular, suited for utilization in medical x-ray diagnostics, mainly computer tomography.