EP0092705A1 - X-ray diagnostic apparatus with an image intensifier television system - Google Patents

X-ray diagnostic apparatus with an image intensifier television system Download PDF

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Publication number
EP0092705A1
EP0092705A1 EP83103365A EP83103365A EP0092705A1 EP 0092705 A1 EP0092705 A1 EP 0092705A1 EP 83103365 A EP83103365 A EP 83103365A EP 83103365 A EP83103365 A EP 83103365A EP 0092705 A1 EP0092705 A1 EP 0092705A1
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EP
European Patent Office
Prior art keywords
ray
image intensifier
rays
video signal
ray tube
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.)
Granted
Application number
EP83103365A
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German (de)
French (fr)
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EP0092705B1 (en
Inventor
Dieter Schmidt
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Siemens AG
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Siemens AG
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Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0092705A1 publication Critical patent/EP0092705A1/en
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Publication of EP0092705B1 publication Critical patent/EP0092705B1/en
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    • 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
    • H05G1/64—Circuit arrangements for X-ray apparatus incorporating image intensifiers
    • 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
    • H05G1/54—Protecting or lifetime prediction

Definitions

  • the invention relates to an X-ray diagnostic system with an image intensifier television chain and an X-ray generator for feeding the X-ray tube.
  • An X-ray diagnostic system of this type is described for example in DE-OS 28 03 913.
  • There is a control circuit for the dose rate that keeps it constant based on a set target value.
  • the actual value of the dose rate is formed by a sensor provided in the light path between the output of the X-ray image intensifier and the television camera.
  • This object is achieved in that there are measuring devices for forming electrical signals which depend on the occurrence of X-rays, light at the output of the X-ray image intensifier and a video signal corresponding to an X-ray image and that these signals are fed to a safety circuit which switches off the X-ray tube if no light and / or video signal appears after the appearance of X-rays.
  • both the X-ray image intensifier and the television chain are monitored for faults, so that the patient is not exposed to unused radiation and unnecessary loads on the generator and the X-ray tube are avoided.
  • an X-ray device which carries an X-ray tube 2 and an X-ray image intensifier 3 on a C-arm 1.
  • the patient 4 lies in the beam path between the X-ray tube 2 and the X-ray image intensifier 3.
  • the X-ray image amplifier 3 is followed by a television chain with a television camera 5, a video amplifier 6 and a monitor 7.
  • the x-ray tube 2 is fed by an x-ray generator 8.
  • a sensor 9 for X-rays is arranged, which supplies an electrical signal to a safety circuit 10 when X-rays occur.
  • a light sensor 11 is provided at the output of the X-ray image intensifier 3 and supplies a signal to the safety circuit 10 when light occurs on the output screen of the X-ray image amplifier 3. Furthermore, a signal is fed to the safety circuit 10 via a coupling stage 12 when a video signal occurs at the output of the video amplifier 6.
  • the safety circuit 10 monitors whether after switching on the X-ray tube 2, i.e. after the occurrence of x-rays, an output image actually appears on the output screen of the x-ray image intensifier 3 and whether a video signal is generated which causes the x-ray image to be displayed on the monitor 7. If there is an error in the imaging system, i.e. If the output image of the X-ray image intensifier 3 or the video signal is missing, the safety circuit 10 supplies the X-ray generator 8 with a control signal which causes the X-ray tube 2 to be switched off.
  • a film or single-image camera can also be optically coupled to the exit fluorescent screen of the x-ray image intensifier 3.
  • the safety circuit 10 also monitors the operation with these cameras.
  • the x-ray generator 8 can be accommodated together with the x-ray tube 2 in a common housing (single-boiler generator).

Abstract

Die Erfindung betrifft eine Röntgendiagnostikanlage mit einer Bildverstärker-Fernsehkette (3, 5, 6) und einem Röntgengenerator (8) für die Speisung der Röntgenröhre (2). Es sind Meßfühler (9, 11, 12) zur Bildung von elektrischen Signalen vorhanden, die von dem Auftreten von Röntgenstrahlung, von Licht am Ausgang des Röntgenbildverstärkers (3) und eines einem Röntgenbild entsprechenden Videosignales abhängen. Diese Signale sind einer Sicherheitsschaltung (10) zugeführt, die die Röntgenröhre (2) abschaltet, wenn nach dem Auftreten von Röntgenstrahlung kein Licht und/oder kein Videosignal auftritt.The invention relates to an X-ray diagnostic system with an image intensifier television chain (3, 5, 6) and an X-ray generator (8) for feeding the X-ray tube (2). There are sensors (9, 11, 12) for the formation of electrical signals which depend on the occurrence of X-rays, light at the output of the X-ray image intensifier (3) and a video signal corresponding to an X-ray image. These signals are fed to a safety circuit (10) which switches off the X-ray tube (2) if no light and / or no video signal occurs after the occurrence of X-rays.

Description

Die Erfindung betrifft eine Röntgendiagnostikanlage mit einer Bildverstärker-Fernsehkette und einem Röntgengenerator für die Speisung der Röntgenröhre.The invention relates to an X-ray diagnostic system with an image intensifier television chain and an X-ray generator for feeding the X-ray tube.

Eine Röntgendiagnostikanlage dieser Art ist beispielsweise in der DE-OS 28 03 913 beschrieben. Dabei ist ein Regelkreis für die Dosisleistung vorhanden, der diese aufgrund eines eingestellten Sollwertes konstant hält. Der Istwert der Dosisleistung wird durch einen im Lichtweg zwischen dem Ausgang des Röntgenbildverstärkers und der Fernsehkamera vorgesehenen Fühler gebildet.An X-ray diagnostic system of this type is described for example in DE-OS 28 03 913. There is a control circuit for the dose rate that keeps it constant based on a set target value. The actual value of the dose rate is formed by a sensor provided in the light path between the output of the X-ray image intensifier and the television camera.

Bei einer .solchen Röntgendiagnostikanlage kann bei Störungen trotz des Auftretens von Röntgenstrahlung am Ausgang des Röntgenbildverstärkers kein Bild auftreten oder trotz eines vorhandenen Ausgangsbildes des Röntgenbildverstärkers ein Videosignal und damit ein Fernsehbild fehlen. Bei solchen Störungen werden der Patient und der Benutzer unnötig mit Strahlung belastet. Ferner erfolgt eine unnötige Spitzenbelastung des Röntgengenerators und der Röntgenröhre, die durch das Hochregeln der Dosisleistungs-Automatiken hervorgerufen wird.In the case of such an X-ray diagnostic system, in the event of malfunctions, no image can occur despite the occurrence of X-radiation at the output of the X-ray image intensifier or a video signal and thus a television image are missing despite an existing output image of the X-ray image intensifier. With such disorders, the patient and the user are unnecessarily exposed to radiation. Furthermore, there is an unnecessary peak load on the x-ray generator and the x-ray tube, which is caused by the up-regulation of the dose rate automatics.

Der Erfindung liegt die Aufgabe zugrunde, eine Röntgendiagnostikanlage der eingangs genannten Art zu schaffen, bei der überwacht wird, ob beim Auftreten von Röntgenstrahlung tatsächlich ein Bild am Ausgang des -:

  • Röntgenbildverstärkers auftritt und ein Fernsehsignal vorliegt und bei der bei Störungen eine automatische Abschaltung der Röntgenröhre erfolgt.
The invention has for its object to provide an X-ray diagnostic system of the type mentioned, in which it is monitored whether an image at the exit of the:
  • X-ray image intensifier occurs and there is a television signal and in the event of malfunctions the X-ray tube is automatically switched off.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß Meßvorrichtungen zur Bildung von elektrischen Signalen vorhanden sind, die von dem Auftreten von Röntgenstrahlung, von Licht am Ausgang des Röntgenbildverstärkers und eines einem Röntgenbild entsprechenden Videosignales abhängen und daß diese Signale einer Sicherheitsschaltung zugeführt sind, die die Röntgenröhre abschaltet, wenn nach dem Auftreten von Röntgenstrahlung kein Licht und/oder kein Videosignal auftritt. Bei der erfindungsgemäßen Röntgendiagnostikanlage wird sowohl der Röntgenbildverstärker als auch die Fernsehkette auf Störungen überwacht, so daß der Patient keiner ungenutzten Strahlung ausgesetzt wird und unnötige Belastungen des Generators und der Röntgenröhre vermieden sind.This object is achieved in that there are measuring devices for forming electrical signals which depend on the occurrence of X-rays, light at the output of the X-ray image intensifier and a video signal corresponding to an X-ray image and that these signals are fed to a safety circuit which switches off the X-ray tube if no light and / or video signal appears after the appearance of X-rays. In the X-ray diagnostic system according to the invention, both the X-ray image intensifier and the television chain are monitored for faults, so that the patient is not exposed to unused radiation and unnecessary loads on the generator and the X-ray tube are avoided.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to an embodiment shown in the drawing.

In der Zeichnung ist ein Röntgengerät dargestellt, das an einem C-Bogen 1 eine Röntgenröhre 2 und einen Röntgenbildverstärker 3 trägt. Der Patient 4 liegt im Strahlengang zwischen der Röntgenröhre 2 und dem Röntgenbildverstärker 3. Dem Röntgenbildverstärker 3 ist eine Fernsehkette mit einer Fernsehkamera 5, einem Videoverstärker 6 und einem Monitor 7 nachgeschaltet. Die Röntgenröhre 2 wird von einem Röntgengenerator 8 gespeist.In the drawing, an X-ray device is shown which carries an X-ray tube 2 and an X-ray image intensifier 3 on a C-arm 1. The patient 4 lies in the beam path between the X-ray tube 2 and the X-ray image intensifier 3. The X-ray image amplifier 3 is followed by a television chain with a television camera 5, a video amplifier 6 and a monitor 7. The x-ray tube 2 is fed by an x-ray generator 8.

Im Strahlengang zwischen der Röntgenröhre 2 und dem Patienten 4, und zwar in der Nähe des Gehäuses der Röntgenröhre 2, ist ein Meßfühler 9 für Röntgenstrahlung angeordnet, der beim Auftreten von Röntgenstrahlung ein elektrisches Signal einer Sicherheitsschaltung 10 zuführt. Am Ausgang des Röntgenbildverstärkers 3 ist ein Lichtmeßfühler 11 vorgesehen, der beim Auftreten von Licht am Ausgangsschirm des Röntgenbildverstärkers 3 der Sicherheitsschaltung 10 ein Signal zuführt. Ferner wird über eine Kopplungsstufe 12 der Sicherheitsschaltung 10 ein Signal zugeführt, wenn am Ausgang des Videoverstärkers 6 ein Videosignal auftritt.In the beam path between the X-ray tube 2 and the patient 4, in the vicinity of the housing X-ray tube 2, a sensor 9 for X-rays is arranged, which supplies an electrical signal to a safety circuit 10 when X-rays occur. A light sensor 11 is provided at the output of the X-ray image intensifier 3 and supplies a signal to the safety circuit 10 when light occurs on the output screen of the X-ray image amplifier 3. Furthermore, a signal is fed to the safety circuit 10 via a coupling stage 12 when a video signal occurs at the output of the video amplifier 6.

Die Sicherheitsschaltung 10 überwacht, ob nach dem Einschalten der Röntgenröhre 2, d.h. nach dem Auftreten von Röntgenstrahlung, auch tatsächlich ein Ausgangsbild auf dem Ausgangsbildschirm des Röntgenbildverstärkers 3 erscheint und ob ein Videosignal erzeugt wird, das die Wiedergabe des Röntgenbildes auf dem Monitor 7 bewirkt. Wenn ein Fehler im Bilderfassungssystem vorliegt, d.h. das Ausgangsbild des Röntgenbildverstärkers 3 oder das Videosignal fehlt, liefert die Sicherheitsschaltung 10 dem Röntgengenerator 8 ein Steuersignal, das die Abschaltung der Röntgenröhre 2 bewirkt.The safety circuit 10 monitors whether after switching on the X-ray tube 2, i.e. after the occurrence of x-rays, an output image actually appears on the output screen of the x-ray image intensifier 3 and whether a video signal is generated which causes the x-ray image to be displayed on the monitor 7. If there is an error in the imaging system, i.e. If the output image of the X-ray image intensifier 3 or the video signal is missing, the safety circuit 10 supplies the X-ray generator 8 with a control signal which causes the X-ray tube 2 to be switched off.

Bei dem gezeichneten Ausführungsbeispiel kann außer der Fernsehkamera 5 auch noch eine Film- oder Einzelbildkamera optisch an den Ausgangsleuchtschirm des Röntgenbildverstärkers 3 angekoppelt sein. Die Sicherheitsschaltung 10 überwacht auch den Betrieb mit diesen Kameras. Der Röntgengenerator 8 kann zusammen mit der Röntgenröhre 2 in einem gemeinsamen Gehäuse untergebracht sein (Einkesselgenerator).In the illustrated embodiment, in addition to the television camera 5, a film or single-image camera can also be optically coupled to the exit fluorescent screen of the x-ray image intensifier 3. The safety circuit 10 also monitors the operation with these cameras. The x-ray generator 8 can be accommodated together with the x-ray tube 2 in a common housing (single-boiler generator).

Claims (1)

Röntgendiagnostikanlage mit einer Bildverstärker-Fernsehkette (3, 5, 6, 7) und einem Röntgengenerator (8) für die Speisung der Röntgenröhre (2), dadurch gekennzeichnet , daß Meßvorrichtungen (9, 11, 12) zur Bildung von elektrischen Signalen vor- .handen sind, die von dem Auftreten von Röntgenstrahlung, von Licht am Ausgang des Röntgenbildverstärkers (3) und eines einem Röntgenbild entsprechenden Videosignales abhängen und daß diese Signale einer Sicherheitsschaltung (10) zugeführt sind, die die Röntgenröhre (2) abschaltet, wenn nach dem Auftreten von Röntgenstrahlung kein Licht und/oder kein Videosignal auftritt.X-ray diagnostic system with an image intensifier television chain (3, 5, 6, 7) and an X-ray generator (8) for supplying the X-ray tube (2), characterized in that measuring devices (9, 11, 12) are used to form electrical signals. are present, which depend on the occurrence of X-rays, light at the output of the X-ray image intensifier (3) and a video signal corresponding to an X-ray image and that these signals are fed to a safety circuit (10) which switches off the X-ray tube (2) if after the occurrence no light and / or no video signal occurs from X-rays.
EP83103365A 1982-04-23 1983-04-06 X-ray diagnostic apparatus with an image intensifier television system Expired EP0092705B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823215114 DE3215114A1 (en) 1982-04-23 1982-04-23 X-RAY DIAGNOSTIC SYSTEM WITH AN IMAGE AMPLIFIER TELEVISION CHAIN
DE3215114 1982-04-23

Publications (2)

Publication Number Publication Date
EP0092705A1 true EP0092705A1 (en) 1983-11-02
EP0092705B1 EP0092705B1 (en) 1986-07-16

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EP83103365A Expired EP0092705B1 (en) 1982-04-23 1983-04-06 X-ray diagnostic apparatus with an image intensifier television system

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US (1) US4530007A (en)
EP (1) EP0092705B1 (en)
JP (1) JPS58197699A (en)
DE (1) DE3215114A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423383A1 (en) * 1989-10-16 1991-04-24 Siemens Aktiengesellschaft X-ray apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432665A1 (en) * 1984-09-05 1986-03-13 Siemens AG, 1000 Berlin und 8000 München X-ray diagnosis device
DE102004017185B4 (en) * 2004-04-07 2010-06-10 Siemens Ag Overall medical system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567854A (en) * 1968-10-23 1971-03-02 Gen Electric Automatic brightness control for x-ray image intensifier system
FR2305094A1 (en) * 1975-03-15 1976-10-15 Philips Nv RADIOSCOPIC INSTALLATION INCLUDING AN IMAGE RECORDING TUBE AND AN IMAGE INTENSIFICATION TUBE AS WELL AS A PLACING AUTOMATO
FR2415938A1 (en) * 1978-01-30 1979-08-24 Siemens Ag INSTALLATION OF RADIODIAGNOSIS INCLUDING AN IMAGE AMPLIFIER TELEVISION CHANNEL
US4185198A (en) * 1976-07-08 1980-01-22 Tokyo Shibaura Electric Co., Ltd. Means for generating an X-ray exposure command in response to a video signal component

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550437C2 (en) * 1975-11-10 1985-03-28 Siemens AG, 1000 Berlin und 8000 München Automatic exposure device for an X-ray recorder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567854A (en) * 1968-10-23 1971-03-02 Gen Electric Automatic brightness control for x-ray image intensifier system
FR2305094A1 (en) * 1975-03-15 1976-10-15 Philips Nv RADIOSCOPIC INSTALLATION INCLUDING AN IMAGE RECORDING TUBE AND AN IMAGE INTENSIFICATION TUBE AS WELL AS A PLACING AUTOMATO
US4185198A (en) * 1976-07-08 1980-01-22 Tokyo Shibaura Electric Co., Ltd. Means for generating an X-ray exposure command in response to a video signal component
FR2415938A1 (en) * 1978-01-30 1979-08-24 Siemens Ag INSTALLATION OF RADIODIAGNOSIS INCLUDING AN IMAGE AMPLIFIER TELEVISION CHANNEL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423383A1 (en) * 1989-10-16 1991-04-24 Siemens Aktiengesellschaft X-ray apparatus

Also Published As

Publication number Publication date
JPH0317200B2 (en) 1991-03-07
US4530007A (en) 1985-07-16
JPS58197699A (en) 1983-11-17
EP0092705B1 (en) 1986-07-16
DE3215114A1 (en) 1983-10-27

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