EP0487767B1 - Hochfrequenz-Röntgengenerator - Google Patents

Hochfrequenz-Röntgengenerator Download PDF

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Publication number
EP0487767B1
EP0487767B1 EP90122684A EP90122684A EP0487767B1 EP 0487767 B1 EP0487767 B1 EP 0487767B1 EP 90122684 A EP90122684 A EP 90122684A EP 90122684 A EP90122684 A EP 90122684A EP 0487767 B1 EP0487767 B1 EP 0487767B1
Authority
EP
European Patent Office
Prior art keywords
resonant circuit
ray generator
voltage
frequency
capacitor
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 - Lifetime
Application number
EP90122684A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0487767A1 (de
Inventor
Otto Dipl.-Ing. Ebersberger (Fh)
Werner Dipl.-Ing. Brandstätter
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
Priority to EP90122684A priority Critical patent/EP0487767B1/de
Priority to DE90122684T priority patent/DE59003559D1/de
Priority to US07/770,247 priority patent/US5155754A/en
Priority to JP1991103375U priority patent/JP2532179Y2/ja
Publication of EP0487767A1 publication Critical patent/EP0487767A1/de
Application granted granted Critical
Publication of EP0487767B1 publication Critical patent/EP0487767B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05G1/10—Power supply arrangements for feeding the X-ray tube
    • H05G1/20—Power supply arrangements for feeding the X-ray tube with high-frequency ac; with pulse trains
    • 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 a high-frequency X-ray generator with two resonant circuit inverters fed by a DC voltage source, each of which contains a resonant circuit capacitor and each feeds a high-voltage transformer, an X-ray tube being connected to two high-voltage rectifiers connected in series and each high-voltage rectifier being fed by one of the high-voltage transformers.
  • a high-frequency X-ray generator is known from DE-A-2 814 320.
  • an x-ray tube with a metal middle part can be used as the x-ray tube, which is connected to the connecting line between the two high-voltage rectifiers.
  • the invention has for its object to design a high-frequency X-ray generator of the type mentioned so that this shift of the center of the high voltage is avoided.
  • This object is achieved in that the resonant circuit impedances are different. If the capacitance of the resonant circuit capacitor of the cathode-side inverter is increased in comparison to the capacitance of the resonant circuit capacitor of the anode-side inverter, then, if appropriate Dimensioning of the current flowing through the metal middle part can be compensated.
  • a further development of the invention is that the capacity of one of the resonant circuits can be switched over.
  • the high-voltage X-ray generator can be used both in connection with an X-ray tube without a metal middle part and in connection with an X-ray tube with a metal middle part.
  • two capacitors with the same capacitance are chosen, in the second case the capacitors are chosen differently.
  • FIG. 1 shows an X-ray tube 1 with a metal middle part 2, which is connected with its anode to the positive pole of a high-voltage rectifier 3 and with its cathode to the negative pole of a high-voltage rectifier 4.
  • the high-voltage rectifiers 3, 4 are connected in series via a measuring resistor 5.
  • the metal middle part 2 is connected to the negative pole of the high-voltage rectifier 3.
  • An inverter 6, 7 is assigned to each high-voltage rectifier 3, 4.
  • the inverters 6, 7 are fed by a DC voltage source 8.
  • Each high-voltage rectifier 3, 4 is preceded by a high-voltage transformer 9, 10 (FIGS. 2 to 4) fed by the corresponding inverter 6, 7.
  • two capacitors 13, 14 are provided in the cathode-side inverter.
  • the capacitor 13 has the same capacitance as the capacitor 11 and is used alone when an X-ray tube without a metal middle part is used.
  • the capacitor 14 is switched on by a switch 15, as a result of which the capacitance of the resonant circuit of the cathode-side inverter 7 is increased.
  • the circuit according to FIG. 3 can accordingly be used optionally for an X-ray tube with or without a metal middle part.
  • the cathode-side inverter 7a has two separately controllable half bridges 16, 17.
  • the half bridge 16 is used when using an X-ray tube without a metal middle part and only switches on the capacitor 13, while when using an X-ray tube with Metal middle part for switching on both capacitors 13, 14, both half bridges 16, 17 are controlled synchronously. It is also possible in this case to control only the half bridge 17 and to switch off the capacitor 13 completely if the capacitor 14 has a correspondingly high capacitance.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
EP90122684A 1990-11-27 1990-11-27 Hochfrequenz-Röntgengenerator Expired - Lifetime EP0487767B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP90122684A EP0487767B1 (de) 1990-11-27 1990-11-27 Hochfrequenz-Röntgengenerator
DE90122684T DE59003559D1 (de) 1990-11-27 1990-11-27 Hochfrequenz-Röntgengenerator.
US07/770,247 US5155754A (en) 1990-11-27 1991-10-03 High frequency supply for an x-ray tube
JP1991103375U JP2532179Y2 (ja) 1990-11-27 1991-11-20 高周波ｘ線発生器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90122684A EP0487767B1 (de) 1990-11-27 1990-11-27 Hochfrequenz-Röntgengenerator

Publications (2)

Publication Number Publication Date
EP0487767A1 EP0487767A1 (de) 1992-06-03
EP0487767B1 true EP0487767B1 (de) 1993-11-18

Family

ID=8204761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122684A Expired - Lifetime EP0487767B1 (de) 1990-11-27 1990-11-27 Hochfrequenz-Röntgengenerator

Country Status (4)

Country Link
US (1) US5155754A (ja)
EP (1) EP0487767B1 (ja)
JP (1) JP2532179Y2 (ja)
DE (1) DE59003559D1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631143C2 (de) * 1996-08-01 2003-03-20 Siemens Ag Hochfrequenz-Röntgengenerator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2634369B2 (ja) * 1993-07-15 1997-07-23 浜松ホトニクス株式会社 Ｘ線装置
DE4443551A1 (de) * 1994-12-07 1996-06-20 Philips Patentverwaltung Anordnung zur Leistungsversorgung eines elektrischen Verbrauchers, insbesondere Röntgen-Apparat
JP2003142294A (ja) * 2001-10-31 2003-05-16 Ge Medical Systems Global Technology Co Llc 高電圧発生回路およびｘ線発生装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814320A1 (de) * 1978-04-03 1979-10-11 Siemens Ag Roentgendiagnostikgenerator mit einem seinen hochspannungstransformator speisenden wechselrichter

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802513C2 (de) * 1978-01-20 1983-10-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Röntgendiagnostikgenerator mit einem seinen Hochspannungstransformator speisenden Wechselrichter, dem ein LC-Schwingkreis zugeordnet ist
DE2831093A1 (de) * 1978-07-14 1980-01-24 Siemens Ag Roentgendiagnostikgenerator
FR2507842A1 (fr) * 1981-06-12 1982-12-17 Gen Equip Med Sa Regulateur de tension a semi-conducteur et generateur de radiologie comportant un tel regulateur
DE3135061A1 (de) * 1981-09-04 1983-03-24 Philips Patentverwaltung Gmbh, 2000 Hamburg Roentgengenerator zum betrieb von roentgenroehren mit an masse angeschlossenem mittelteil
DE3218535A1 (de) * 1982-05-17 1983-11-17 Philips Patentverwaltung Hochspannungserzeuger, insbesondere zur speisung einer roentgenroehre
SE438109B (sv) * 1983-11-28 1985-04-01 Esab Ab Stromkella for ljusbagsvetsning
DE3437064A1 (de) * 1984-10-09 1986-04-10 Siemens AG, 1000 Berlin und 8000 München Mittelfrequenz-roentgengenerator
DE3567351D1 (en) * 1984-10-09 1989-02-09 Siemens Ag Medium-frequency x-ray generator power supply
DE3625855A1 (de) * 1986-07-31 1988-02-04 Siemens Ag Mittelfrequenz-roentgendiagnostikgenerator
US4807269A (en) * 1987-04-02 1989-02-21 Grady John K Apparatus for powering x-ray tubes
JPS6489198A (en) * 1987-09-30 1989-04-03 Toshiba Corp X-ray high-voltage device
DE3900146A1 (de) * 1988-01-08 1989-07-20 Toshiba Kawasaki Kk Stromversorgungseinrichtung fuer einen roentgenstrahl-ct-scanner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814320A1 (de) * 1978-04-03 1979-10-11 Siemens Ag Roentgendiagnostikgenerator mit einem seinen hochspannungstransformator speisenden wechselrichter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631143C2 (de) * 1996-08-01 2003-03-20 Siemens Ag Hochfrequenz-Röntgengenerator

Also Published As

Publication number Publication date
JPH0499700U (ja) 1992-08-28
JP2532179Y2 (ja) 1997-04-09
DE59003559D1 (de) 1993-12-23
EP0487767A1 (de) 1992-06-03
US5155754A (en) 1992-10-13

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