EP0167883B1 - Röntgendiagnostikeinrichtung mit einer Regelvorrichtung für die Röntgenröhrenhochspannung - Google Patents

Röntgendiagnostikeinrichtung mit einer Regelvorrichtung für die Röntgenröhrenhochspannung Download PDF

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Publication number
EP0167883B1
EP0167883B1 EP85107480A EP85107480A EP0167883B1 EP 0167883 B1 EP0167883 B1 EP 0167883B1 EP 85107480 A EP85107480 A EP 85107480A EP 85107480 A EP85107480 A EP 85107480A EP 0167883 B1 EP0167883 B1 EP 0167883B1
Authority
EP
European Patent Office
Prior art keywords
ray
ray tube
voltage
high voltage
diagnostic apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85107480A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0167883A1 (de
Inventor
Klaus Brunn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0167883A1 publication Critical patent/EP0167883A1/de
Application granted granted Critical
Publication of EP0167883B1 publication Critical patent/EP0167883B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/265—Measurements of current, voltage or power
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/32—Supply voltage of the X-ray apparatus or tube

Definitions

  • the invention relates to an x-ray diagnostic device with a control device for the x-ray tube high voltage, which has two radiation detectors as the actual value transmitter, to which the x-ray radiation is fed via different filters and which is followed by a divider for forming the actual value signal.
  • Such an X-ray diagnostic device is known from FR-A-2 481 045 (corresponding to DE-A-3 014 879).
  • the actual value signal for the x-ray tube high voltage is formed by detecting the radiation quality of the x-ray radiation. Since this radiation quality is the value that is to be kept constant, it is optimally determined in such an X-ray diagnostic device.
  • the divider does not provide any meaningful signal in the area of low x-ray tube high voltages, especially immediately after the x-ray tube is switched on, so that control vibrations can occur.
  • the invention is based on the object of designing an X-ray diagnostic device of the type mentioned at the outset in such a way that reliable control is ensured even in the region of low X-ray tube high voltages.
  • this object is achieved in that a voltage divider is provided in the high-voltage circuit as a second actual value transmitter for the high-voltage X-ray tube, which can be activated by a switching device instead of the first actual value transmitter at the beginning of an X-ray exposure.
  • a voltage divider is provided in the high-voltage circuit as a second actual value transmitter for the high-voltage X-ray tube, which can be activated by a switching device instead of the first actual value transmitter at the beginning of an X-ray exposure.
  • the exemplary embodiment represents an X-ray diagnostic device of a computer tomograph, which has a detector row 1 and an X-ray tube 2, which are rotated together about a patient 3.
  • the patient is irradiated in different directions, so that a cross-sectional image of the patient 3 can be calculated from the output signals of the detector row 1.
  • the x-ray tube 2 is supplied with high voltage by two high-voltage generators 4, 5 connected in series, which are connected to one another via two resistors 6, the common point of which is connected to ground.
  • a signal corresponding to the X-ray tube current is tapped off at the resistors 6 and is fed to an X-ray tube current regulator 8 after amplification in an amplifier 7.
  • the X-ray tube current controller 8 receives on line 9 a signal corresponding to the target value of the X-ray tube current and influences, via a current transformer 10, an actuator 11 in the heating circuit of the X-ray tube 2 in the sense of an adjustment of the actual value of the X-ray tube current to the target value.
  • two voltage dividers 12, 13 are provided in the high-voltage circuit of the X-ray tube 2, from which a signal corresponding to the high-voltage X-ray tubes is tapped.
  • This signal is amplified in an amplifier 14 and fed to a voltage regulator 15, which receives a setpoint signal for the high-voltage X-ray tube on line 16. It influences the high-voltage generators 4, 5 via the line 17 and a switching device 18 in their fully drawn position in the sense of an adjustment of the high-voltage X-ray tubes to the desired value.
  • two radiation detectors 19, 20 are provided, the radiation detector 19 being covered by a radiation filter 21.
  • the output signals of the beam detectors 19, 20 are fed to a divider 22.
  • the divider 22 generates on line 23 a signal corresponding to the actual value of the radiation quality.
  • This signal influences the high voltage on the x-ray tube 2 via a controller 24 in the sense of an adjustment of the actual value of the radiation quality to a setpoint value, which is embodied by a signal on the line 25 when the switching device 18 assumes its position shown in dashed lines.
  • the switching device 18 is actuated by a ramp generator 26, which activates the control circuit part 12 to 17 immediately at the start of an X-ray recording when the X-ray tube high voltage is still low and the control circuit part 19 to 25 when a minimum value of the X-ray tube high voltage is exceeded.
  • the radiation detector 19 is covered by a filter 21.
  • the radiation to the radiation detectors 19, 20 is accordingly filtered differently, specifically for the radiation detector 20 by air and for the radiation detector 19 by the filter 21.
  • two filters of different materials can also be arranged in front of the radiation detectors 19, 20.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
EP85107480A 1984-06-29 1985-06-18 Röntgendiagnostikeinrichtung mit einer Regelvorrichtung für die Röntgenröhrenhochspannung Expired EP0167883B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3424055 1984-06-29
DE3424055 1984-06-29

Publications (2)

Publication Number Publication Date
EP0167883A1 EP0167883A1 (de) 1986-01-15
EP0167883B1 true EP0167883B1 (de) 1988-03-30

Family

ID=6239493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107480A Expired EP0167883B1 (de) 1984-06-29 1985-06-18 Röntgendiagnostikeinrichtung mit einer Regelvorrichtung für die Röntgenröhrenhochspannung

Country Status (4)

Country Link
US (1) US4679218A (enrdf_load_stackoverflow)
EP (1) EP0167883B1 (enrdf_load_stackoverflow)
JP (1) JPS6118600U (enrdf_load_stackoverflow)
DE (1) DE3562062D1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446516A (en) * 1994-02-23 1995-08-29 Fischer Industries, Inc. Replenisher system for x-ray film processor
US6215842B1 (en) * 1998-08-13 2001-04-10 Picker Int Inc Reduction of temporal variations in X-ray radiation
RU2540419C2 (ru) * 2009-03-25 2015-02-10 Сосьедад Эспаньола Де Электромедисина И Калидад, С.А. Разрядный модуль для высоковольтных рентгеновских трубок
CN101965093B (zh) * 2010-08-03 2013-12-25 深圳市蓝韵实业有限公司 一种高压发生器校准方法
EP4576944A1 (de) * 2023-12-21 2025-06-25 Siemens Healthineers AG Messsystem für einen bipolaren hochspannungsgenerator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983819A (en) * 1958-06-05 1961-05-09 Gen Electric Radiation gauge
US3631434A (en) * 1969-10-08 1971-12-28 Barnes Eng Co Passive intrusion detector
US3703718A (en) * 1971-01-07 1972-11-21 Optical Coating Laboratory Inc Infrared intrusion detector system
US3765539A (en) * 1971-06-28 1973-10-16 E Boyle Support platform and package incorporating same
DE2329414A1 (de) * 1973-06-08 1975-01-02 Siemens Ag Roentgendiagnostikapparat zur anfertigung von roentgenaufnahmen mit einem zeitschalter zur bestimmung der aufnahmedauer
US4189645A (en) * 1978-06-28 1980-02-19 Advanced Instrument Development, Inc. X-ray measuring system
DE2846458A1 (de) * 1978-10-25 1980-05-08 Siemens Ag Roentgendiagnostikgenerator mit einem seinen hochspannungstransformator speisenden wechselrichter
US4203033A (en) * 1979-03-16 1980-05-13 Jacobson Arnold F Radiation energy calibrating system and method
US4321594A (en) * 1979-11-01 1982-03-23 American District Telegraph Company Passive infrared detector
DE3014879C2 (de) * 1980-04-17 1985-11-14 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Messung der Röntgenröhrenhochspannung bei einer Röntgendiagnostikanlage
CH650604A5 (de) * 1980-10-24 1985-07-31 Cerberus Ag Optische anordnung fuer einen infrarot-einbruchdetektor.
US4361900A (en) * 1980-11-20 1982-11-30 Victoreen, Inc. Radiation monitoring device

Also Published As

Publication number Publication date
US4679218A (en) 1987-07-07
EP0167883A1 (de) 1986-01-15
DE3562062D1 (en) 1988-05-05
JPH0231757Y2 (enrdf_load_stackoverflow) 1990-08-28
JPS6118600U (ja) 1986-02-03

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