EP0092705B1 - 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
EP0092705B1
EP0092705B1 EP83103365A EP83103365A EP0092705B1 EP 0092705 B1 EP0092705 B1 EP 0092705B1 EP 83103365 A EP83103365 A EP 83103365A EP 83103365 A EP83103365 A EP 83103365A EP 0092705 B1 EP0092705 B1 EP 0092705B1
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EP
European Patent Office
Prior art keywords
ray
image intensifier
radiation
image
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.)
Expired
Application number
EP83103365A
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German (de)
French (fr)
Other versions
EP0092705A1 (en
Inventor
Dieter Schmidt
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
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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 EP0092705A1 publication Critical patent/EP0092705A1/en
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Publication of EP0092705B1 publication Critical patent/EP0092705B1/en
Expired legal-status Critical Current

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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 according to the preamble of the claim.
  • DE-A-2 803 913 describes an X-ray diagnostic system with an image intensifier television chain and an X-ray generator for feeding the X-ray tube. 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.
  • FR-A-2 305 094 describes an X-ray diagnostic system according to the preamble of the claim, in which a circuit forming an automatic exposure device receives a signal which is formed by a radiation detector which is arranged after the patient. Another signal is derived from the video signal from a television camera. Both signals are compared with a target value and the X-ray tube is switched off when a predetermined radiation dose is reached.
  • 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 actually appears at the output of the X-ray image intensifier when X-ray radiation occurs and a television signal is present and in which the X-ray tube is automatically switched off in the event of faults.
  • 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 stress on the generator and the X-ray tube is 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 measuring sensor 9 for X-ray radiation is arranged, which feeds an electrical signal to a safety circuit 10 when X-ray radiation occurs.
  • a light measuring sensor 11 is provided, which supplies a signal to the safety circuit 10 when light appears on the output screen of the X-ray image intensifier 3.
  • 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).

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • X-Ray Techniques (AREA)
  • Closed-Circuit Television Systems (AREA)

Description

Die Erfindung betrifft eine Röntgendiagnostikanlage gemäss dem Oberbegriff des Patentanspruches.The invention relates to an X-ray diagnostic system according to the preamble of the claim.

In der DE-A-2 803 913 ist eine Röntgendiagnostikanlage mit einer Bildverstärker-Fernsehkette und einem Röntgengenerator für die Speisung der Röntgenröhre 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.DE-A-2 803 913 describes an X-ray diagnostic system with an image intensifier television chain and an X-ray generator for feeding the X-ray tube. 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.

In der FR-A-2 305 094 ist eine Röntgendiagnostikanlage gemäss dem Oberbegriff des Patentanspruches beschrieben, bei der eine einen Belichtungsautomaten bildende Schaltung ein Signal erhält, das von einem Strahlendetektor gebildet wird, der nach dem Patienten angeordnet ist. Ein weiteres Signal wird aus dem Videosignal einer Fernsehkamera abgeleitet. Beide Signale werden dabei mit jeweils einem Sollwert verglichen und die Röntgenröhre wird beim Erreichen einer vorbestimmten Strahlendosis abgeschaltet.FR-A-2 305 094 describes an X-ray diagnostic system according to the preamble of the claim, in which a circuit forming an automatic exposure device receives a signal which is formed by a radiation detector which is arranged after the patient. Another signal is derived from the video signal from a television camera. Both signals are compared with a target value and the X-ray tube is switched off when a predetermined radiation dose is reached.

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 appear 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 actually appears at the output of the X-ray image intensifier when X-ray radiation occurs and a television signal is present and in which the X-ray tube is automatically switched off in the event of faults.

Diese Aufgabe ist erfindungsgemäss durch die im kennzeichnenden Teil des Patentanspruches angegebene Ausbildung gelöst. 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 wird.This object is achieved according to the invention by the training specified in the characterizing part of the claim. 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 stress on the generator and the X-ray tube is avoided.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels 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 Kupplungsstufe 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, specifically in the vicinity of the housing of the X-ray tube 2, a measuring sensor 9 for X-ray radiation is arranged, which feeds an electrical signal to a safety circuit 10 when X-ray radiation occurs. At the output of the X-ray image intensifier 3, a light measuring sensor 11 is provided, which supplies a signal to the safety circuit 10 when light appears on the output screen of the X-ray image intensifier 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)

1. Diagnostic X-ray apparatus with an image intensifier television system (3, 5, 6, 7) and an X-ray generator (8) which feeds the X-ray tube (2), measuring devices (9, 12) being provided for the formation of electrical signals dependent upon the occurrence of X-ray radiation and a video signal which corresponds to an X-ray image, these signals being fed to a circuit (10) which disconnects the X-ray tube (2) when predetermined conditions are fulfilled, characterised in that the circuit (10) represents a safety circuit which is fed, in addition to the radiation and video image dependent signals, with a signal dependent upon the light at the output of the X-ray image intensifier (3) and is designed such that is disconnects the X-ray tube (2) in the event of no light and/or no video signal occurring following the occurrence of X-ray radiation.
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
DE3215114 1982-04-23
DE19823215114 DE3215114A1 (en) 1982-04-23 1982-04-23 X-RAY DIAGNOSTIC SYSTEM WITH AN IMAGE AMPLIFIER TELEVISION CHAIN

Publications (2)

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

Family

ID=6161709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103365A Expired EP0092705B1 (en) 1982-04-23 1983-04-06 X-ray diagnostic apparatus with an image intensifier television system

Country Status (4)

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

Families Citing this family (3)

* 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
DE58905562D1 (en) * 1989-10-16 1993-10-14 Siemens Ag X-ray device.
DE102004017185B4 (en) * 2004-04-07 2010-06-10 Siemens Ag Overall medical system

Family Cites Families (5)

* 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
DE2511523A1 (en) * 1975-03-15 1976-09-23 Philips Patentverwaltung ROENTGEN SYSTEM WITH A TELEVISION DEVICE AND AN EXPOSURE MACHINE
DE2550437C2 (en) * 1975-11-10 1985-03-28 Siemens AG, 1000 Berlin und 8000 München Automatic exposure device for an X-ray recorder
JPS536593A (en) * 1976-07-08 1978-01-21 Toshiba Corp X-ray apparatus for diagnosis
DE2803913C2 (en) * 1978-01-30 1986-01-30 Siemens AG, 1000 Berlin und 8000 München X-ray diagnostic system with an image intensifier television chain

Also Published As

Publication number Publication date
US4530007A (en) 1985-07-16
JPS58197699A (en) 1983-11-17
JPH0317200B2 (en) 1991-03-07
EP0092705A1 (en) 1983-11-02
DE3215114A1 (en) 1983-10-27

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