Patent classifications
H05G1/22
Control device for an x-ray tube and method for operating an x-ray tube
The invention relates to a control device for an X-ray tube (2), comprising a housing (29) that is designed as a shield, in which an anode current regulating unit (1) is arranged and which is connected to a cathode power supply unit (18), a plurality of cathode voltage switches (20, 21, 22, 23, 24) which are to be connected to in each case a cathode (4), and a programmable assembly (25), in which the control of the cathodes (4) is determined. The cathode power supply unit (18), the cathode voltage switches (20, 21, 22, 23, 24) and the programmable assembly (18) are also arranged in the housing (29).
Control device for an x-ray tube and method for operating an x-ray tube
The invention relates to a control device for an X-ray tube (2), comprising a housing (29) that is designed as a shield, in which an anode current regulating unit (1) is arranged and which is connected to a cathode power supply unit (18), a plurality of cathode voltage switches (20, 21, 22, 23, 24) which are to be connected to in each case a cathode (4), and a programmable assembly (25), in which the control of the cathodes (4) is determined. The cathode power supply unit (18), the cathode voltage switches (20, 21, 22, 23, 24) and the programmable assembly (18) are also arranged in the housing (29).
ACTIVE RISE AND FALL TIME COMPENSATION ALGORITHM
A method is provided for compensating the settings of a pulsed X-ray system. A current, voltage and intended pulse width settings are selected for the X-ray pulses to be provided. Then, the selected pulse width setting for the set voltage and tube current is compensated, in accordance with stored normalized value or values at a predetermined temperature, taking into account the environmental temperature of the electric circuitry of the X-ray tank. The normalized values are obtained in a calibration step from the actual or effective pulse width and the difference thereof with the intended width, normalizing said value with the temperature of the circuitry providing pulsed voltage and current to the source.
ACTIVE RISE AND FALL TIME COMPENSATION ALGORITHM
A method is provided for compensating the settings of a pulsed X-ray system. A current, voltage and intended pulse width settings are selected for the X-ray pulses to be provided. Then, the selected pulse width setting for the set voltage and tube current is compensated, in accordance with stored normalized value or values at a predetermined temperature, taking into account the environmental temperature of the electric circuitry of the X-ray tank. The normalized values are obtained in a calibration step from the actual or effective pulse width and the difference thereof with the intended width, normalizing said value with the temperature of the circuitry providing pulsed voltage and current to the source.
Active rise and fall time compensation algorithm
A method for compensating the settings of a pulsed X-ray system. The method selects current, voltage, and intended pulse width settings for the X-ray pulses. The method then compensates the selected pulse width setting for the set voltage and tube current, in accordance with at least one stored normalized value at a predetermined temperature, taking into account the environmental temperature of the electric circuitry of an X-ray tank of the X-ray system. The at least one normalized value is obtained in a calibration step based on the actual pulse width and the difference thereof with the intended pulse width at a predetermined temperature, taking into account the internal temperature of the X-ray tank.
Active rise and fall time compensation algorithm
A method for compensating the settings of a pulsed X-ray system. The method selects current, voltage, and intended pulse width settings for the X-ray pulses. The method then compensates the selected pulse width setting for the set voltage and tube current, in accordance with at least one stored normalized value at a predetermined temperature, taking into account the environmental temperature of the electric circuitry of an X-ray tank of the X-ray system. The at least one normalized value is obtained in a calibration step based on the actual pulse width and the difference thereof with the intended pulse width at a predetermined temperature, taking into account the internal temperature of the X-ray tank.
Multi-pixel X-ray source with tungsten-diamond transmission target
A multi-pixel x-ray source is provided. The x-ray source includes a plurality of transmission target assemblies. The transmission target assembly includes a tungsten target and a diamond substrate. The substrate includes a first transmission surface and a second transmission surface opposite first transmission surface. The substrate further includes a first side surface and a second side surface disposed between the first and second transmission surfaces. The target covers the first transmission surface of the substrate. The transmission target assembly further includes a base. The base surrounds the first and second side surfaces of substrate, exposing a collimator surface of the second transmission surface and the target. The transmission target assembly is configured to transmit x-ray generated by the target through the target and the substrate.
SYSTEM FOR CONTROLLING A HIGH VOLTAGE FOR X-RAY APPLICATIONS, AN X-RAY GENERATION SYSTEM, AND A METHOD FOR CONTROLLING A HIGH VOLTAGE
A system is for controlling a high voltage for x-ray applications. In an embodiment, the system includes a controller including at least one input for a mains input voltage, and one output for outputting a primary-side transformer current; and a distance compensation suited to providing the primary-side transformer current with a determined pulse frequency or a determined pulse length.
Rotary anode type X-ray tube apparatus comprising rotary anode driving device
A rotary anode driving device includes a DC power supply, an inverter circuit which is connected to the DC power supply and includes a plurality of switching elements and, the inverter circuit generates an AC voltage from a DC voltage of the DC power supply, and outputs the AC voltage to a stator coil which generates a rotating magnetic field of an X-ray tube; a pulse width modulation (PWM) waveform generator configured to generate an AC voltage of two phases or three phases as the AC voltage from the DC voltage by performing PWM control of the switching elements of the inverter circuit; and a capacitor connected in series to an input side of a stator coil of at least one phase of the stator coil, the capacitor having an electrostatic capacitance constituting a series resonant circuit with the stator coil to which the capacitor is connected.
Rotary anode type X-ray tube apparatus comprising rotary anode driving device
A rotary anode driving device includes a DC power supply, an inverter circuit which is connected to the DC power supply and includes a plurality of switching elements and, the inverter circuit generates an AC voltage from a DC voltage of the DC power supply, and outputs the AC voltage to a stator coil which generates a rotating magnetic field of an X-ray tube; a pulse width modulation (PWM) waveform generator configured to generate an AC voltage of two phases or three phases as the AC voltage from the DC voltage by performing PWM control of the switching elements of the inverter circuit; and a capacitor connected in series to an input side of a stator coil of at least one phase of the stator coil, the capacitor having an electrostatic capacitance constituting a series resonant circuit with the stator coil to which the capacitor is connected.