EP0226037B1 - Installation de radiodiagnostic - Google Patents

Installation de radiodiagnostic Download PDF

Info

Publication number
EP0226037B1
EP0226037B1 EP86115629A EP86115629A EP0226037B1 EP 0226037 B1 EP0226037 B1 EP 0226037B1 EP 86115629 A EP86115629 A EP 86115629A EP 86115629 A EP86115629 A EP 86115629A EP 0226037 B1 EP0226037 B1 EP 0226037B1
Authority
EP
European Patent Office
Prior art keywords
voltage
ray tube
switch
ray diagnostic
ray
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
EP86115629A
Other languages
German (de)
English (en)
Other versions
EP0226037A1 (fr
Inventor
Heinz-Erik Dipl.-Ing. Kranberg
Horst Dipl.-Ing.(Fh) Hallmann
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 EP0226037A1 publication Critical patent/EP0226037A1/fr
Application granted granted Critical
Publication of EP0226037B1 publication Critical patent/EP0226037B1/fr
Expired legal-status Critical Current

Links

Images

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
    • H05G1/56—Switching-on; Switching-off

Definitions

  • the invention relates to an X-ray diagnostic device with an X-ray tube, a high-voltage generator and a switching device for switching the X-ray tube on and off.
  • the invention has for its object to provide an X-ray diagnostic device of the type mentioned in such a way that the time constant after which the X-ray tube voltage decays after the high voltage has been switched off is reduced compared to the prior art.
  • This object is achieved in that there is a resistor parallel to the X-ray tube, to which a switch is assigned, which is controlled by the switching device in such a way that it connects the resistor to the X-ray tube when it is switched off.
  • the high-voltage-resistant resistor is switched parallel to the X-ray tube at the moment of switching off. Accordingly, an additional power loss is not generated unnecessarily. Only the energy stored in the capacitors of the high-voltage circuit is converted in this resistor.
  • the X-ray tube 1 shows an X-ray tube 1, which is fed from the network at terminals 13 via a high-voltage generator 2.
  • the high-voltage generator 2 contains a high-voltage transformer 3, a high-voltage rectifier 4 and a smoothing capacitor 5.
  • the X-ray tube 1 is switched on and off by a switch 6 in the primary circuit of the high-voltage transformer 3 with the aid of a control device 7.
  • the control device 7 also controls a switch 8 which is connected in series with an ohmic, high-voltage-resistant resistor 9.
  • the series connection of the components 8, 9 is connected in parallel to the X-ray tube 1.
  • the resistor 9 with the switch 8 can be housed as a retrofittable assembly in a unit in an oil-filled boiler.
  • a unit of this type is referred to below as a pulse addition.
  • a realization of such a pulse addition 10 between the X-ray tube 1 and the high-voltage generator 2 is shown in FIG.
  • the pulse additive 10 contains, as a variable load resistance and at the same time as a switch, a high-voltage triode 11, a control circuit 12 for the grid of the high-voltage triode 11, a heating transformer 13 for heating the cathode and setting the resistance of the high-voltage triode 11 via the heating current-dependent anode current and a voltage divider chain 14 for generating the negative grid voltage for the high voltage triode 11.
  • the pulse addition 10 Via an oil switch 15, the pulse addition 10 z. B. in fluoroscopy and cinema operation.
  • the X-ray tube voltage is present on the anode-cathode section of the high-voltage triode 11 and a negative reverse voltage of approximately 3 kV is present on the grid through the voltage divider chain 14.
  • the high-voltage triode 11 is thus blocked.
  • the grid voltage is reduced to almost zero volts via the control device 7 by the transistor 16 and the resistor 17, the high-voltage triode 11 is turned on and discharges the capacitances in the high-voltage circuit with low resistance.
  • the X-ray tube voltage thus drops to values below 20 kV in about 0.5 ms.
  • the control of the transistor 16 must be carried out via a potential separation, but since work is only carried out in the switch mode, the effort remains low (pulse transformer, optocoupler).

Landscapes

  • X-Ray Techniques (AREA)

Claims (2)

1. Equipement de radiodiagnostic comportant un tube à rayons X (1), un générateur de haute tension (2) et un dispositif de commutation (6, 7) servant à brancher et à débrancher le tube à rayons X (1) caractérisé par le fait qu'en parallèle avec le tube à rayons X (1) se trouve branchée une résistance (9, 11), à laquelle est associé un interrupteur (8, 16), qui est commandé par le dispositif de commutation (6, 7), de sorte qu'il raccorde la résistance (9, 11) au tube à rayons X (1), lorsque ce dernier est arrêté.
2. Equipement de radiodiagnostic suivant la revendication 1, caractérisé par le fait que la résistance (11) est commandable.
EP86115629A 1985-11-25 1986-11-11 Installation de radiodiagnostic Expired EP0226037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541612 1985-11-25
DE19853541612 DE3541612A1 (de) 1985-11-25 1985-11-25 Roentgendiagnostikeinrichtung

Publications (2)

Publication Number Publication Date
EP0226037A1 EP0226037A1 (fr) 1987-06-24
EP0226037B1 true EP0226037B1 (fr) 1989-10-25

Family

ID=6286759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115629A Expired EP0226037B1 (fr) 1985-11-25 1986-11-11 Installation de radiodiagnostic

Country Status (4)

Country Link
US (1) US4731803A (fr)
EP (1) EP0226037B1 (fr)
JP (1) JPS6292600U (fr)
DE (2) DE3541612A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5966425A (en) * 1989-12-07 1999-10-12 Electromed International Apparatus and method for automatic X-ray control
US5056125A (en) * 1989-12-07 1991-10-08 Robert Beland Discharge module for X-ray cable
US5388139A (en) * 1989-12-07 1995-02-07 Electromed International High-voltage power supply and regulator circuit for an X-ray tube with closed-loop feedback for controlling X-ray exposure
US5241260A (en) * 1989-12-07 1993-08-31 Electromed International High voltage power supply and regulator circuit for an X-ray tube with transient voltage protection
CN111726924A (zh) * 2020-07-27 2020-09-29 辽宁道特凯力科技有限公司 一种医用x射线高压发生器的控制系统及控制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1037032B (de) * 1956-07-13 1958-08-21 Siemens Reiniger Werke Ag Einrichtung zur verzoegerungsarmen Abschaltung der bildgebenden Strahlung einer Roentgenroehre
DE1119417B (de) * 1960-08-17 1961-12-14 Siemens Reiniger Werke Ag Schaltungsanordnung zum Loeschen von in Gleichstromkreise eingeschalteten Gas- oder Dampfentladungsstrecken, insbesondere zur Kurzzeitschaltung von Roentgenroehren
DE1156899B (de) * 1960-09-17 1963-11-07 Koch & Sterzel Kommanditgesell Vorrichtung zur verzoegerungsarmen Abschaltung der bildgebenden Strahlung einer Roentgenroehre
DE2608243A1 (de) * 1976-02-28 1977-09-01 Koch & Sterzel Kg Roentgenapparat
DE2719373C2 (de) * 1977-04-30 1982-10-21 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung eines Röntgengenerators mit einem durch ein Zeitsteuerglied gesteuerten elektronischen Schalter im Primärkreis eines Hochspannungs-Transformators
DE2757505A1 (de) * 1977-12-22 1979-07-05 Siemens Ag Roentgendiagnostikgenerator, bei dem die roentgenroehrenspannung ueber den roentgenroehrenstrom geregelt wird
JPS5721117A (en) * 1980-07-15 1982-02-03 Casio Comput Co Ltd Digital filter device

Also Published As

Publication number Publication date
US4731803A (en) 1988-03-15
JPS6292600U (fr) 1987-06-13
DE3666651D1 (en) 1989-11-30
DE3541612A1 (de) 1987-05-27
EP0226037A1 (fr) 1987-06-24

Similar Documents

Publication Publication Date Title
DE2703347B2 (de) Elektrochirurgische« Gerät
DE2221225A1 (de) Schnellschaltkreis zum Betrieb einer kapazitiven Last
DE19513441C5 (de) Schaltungsanordnung zur Erzeugung einer Prüfspannung für die Prüfung elektrischer Betriebsmittel
EP0226037B1 (fr) Installation de radiodiagnostic
DE3142305A1 (de) "spannungskonstanthalter und -kompensationsverfahren"
DE3101848C2 (fr)
DE1926020B2 (de) Spannungsregelschaltung für Fernsehempfänger
DE2167212C2 (de) Schaltungsanordnung zur Erzeugung wenigstens einer vorgegebenen Ausgangsspannung, deren Größe von einer Eingangsspannung unabhängig ist
DE3600205C2 (fr)
DE1283878C2 (de) Energierueckgewinnungsschaltung fuer die horizontalablenkstufe eines fernsehempfaengers
DE1932392A1 (de) Steuereinrichtung fuer elektrische Belastung
DE1903621A1 (de) Thyristor-Ansteuerschaltung
DE2165602A1 (de) Spannungsversorgungsanordnung
DE2249064A1 (de) Schaltungsanordnung zur potentialfreien uebertragung von emissionsstroemen bei roentgenroehren
DE2746115A1 (de) Wechselrichter mit mindestens zwei steuerbaren lastthyristoren
DE1489934A1 (de) Selbsttaetige Steuerung von Roehrenstroemen
DE3111115A1 (de) "vertikalablenkschaltung"
DE2162881A1 (de) Niederspannungs-versorgungsschaltung fuer ein fernsehempfangsgeraet
DE2802451A1 (de) Roentgendiagnostikgenerator
EP0279317A1 (fr) Installation de radiodiagnostic
DE2205083A1 (de) Wechsel-Gleichspannungsumwandler
DE1167456B (de) Roentgendiagnostikapparat mit symmetrisch geerdetem Hochspannungskreis fuer Roentgenkinoaufnahmeserien mit einer gittergesteuerten Roentgenroehre
DE2144723A1 (de) Horizontalablenkschaltung fuer fernsehempfaenger
DE1438397C (de) Statischer Frequenzumformer
DE961271C (de) Einrichtung zur Erzeugung hoher Gleichspannungen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR

17P Request for examination filed

Effective date: 19870708

17Q First examination report despatched

Effective date: 19890124

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19891124

Year of fee payment: 4

REF Corresponds to:

Ref document number: 3666651

Country of ref document: DE

Date of ref document: 19891130

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900126

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST