EP0351508A3 - Method for automatically matching an x-ray diagnostic generator with the mains resistance, and the x-ray diagnostic generator - Google Patents

Method for automatically matching an x-ray diagnostic generator with the mains resistance, and the x-ray diagnostic generator Download PDF

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Publication number
EP0351508A3
EP0351508A3 EP19890108298 EP89108298A EP0351508A3 EP 0351508 A3 EP0351508 A3 EP 0351508A3 EP 19890108298 EP19890108298 EP 19890108298 EP 89108298 A EP89108298 A EP 89108298A EP 0351508 A3 EP0351508 A3 EP 0351508A3
Authority
EP
European Patent Office
Prior art keywords
voltage
network
ray
exposure
value
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.)
Withdrawn
Application number
EP19890108298
Other languages
German (de)
French (fr)
Other versions
EP0351508A2 (en
Inventor
Otto Sackmann
Roland Dipl.-Ing. Reuther
Rainer Dipl.-Ing. Heyne
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
Priority claimed from DD31805488A external-priority patent/DD281687B5/en
Priority claimed from DD31805388A external-priority patent/DD281686B5/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0351508A2 publication Critical patent/EP0351508A2/en
Publication of EP0351508A3 publication Critical patent/EP0351508A3/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • H05G1/46—Combined control of different quantities, e.g. exposure time as well as voltage or current

Abstract

Die Erfindung betrifft ein Verfahren zur selbsttätigen Anpassung eines Röntgendiagnostikgenerators an den Speise­ netzwiderstand sowie einen entsprechenden Röntgendia­ gnostikgenerator, der einen mittels eines Schalters (3) and das Speisenetz schaltbaren Belastungswiderstand (4), ein Meßwerterfassungsglied (16) zur Erfassung des Span­ nungszusammenbruchs und der Leerlaufnetzspannung sowie eine Rechnereinheit (12) aufweist, der Einstellmittel für die Röntgenröhrenspannung und das Milliamperesekunden-Pro­ dukt zugeordnet sind und die gemäß abgespeicherten Rönt­ genröhren-Belastungsdaten vor Aufnahmeauslösung jeweils den maximal zulässigen Röntgenröhrenstrom bei kürzester Aufnahmezeit errechnet. Erfindungsgemäß wird von der Rechnereinheit (12) der Wert der zusammengebrochenen Span­ nung (UNetz/Last) sowie der Leerlaufnetzspannung (UNetz/leer) gemessen und daraus der Netzinnenwiderstand Ri/Netz) berechnet, dessen Wert sowie der jeweilige aktuelle Wert der Leerlaufnetzspannung in einem Speicher (13) festgehalten werden, worauf ein Vergleich zwischen einer errechneten, während der Röntgenaufnahme zu erwar­ tenden Netzspannung und dem gespeicherten Wert einer Bezugsnetzspannung durchgeführt und in Abhängigkeit vom Vergleichsergebnis entweder ein Steuersignal zur Freigabe der Röntgenaufnahme gebildet oder ein entsprechend redu­ zierter Röntgenröhrenstromwert und eine entsprechend verlängerte Aufnahmezeit ausgegeben werden. The invention relates to a method for the automatic adaptation of an X-ray diagnostic generator to the supply network resistor and a corresponding X-ray diagnostic generator, which has a switchable by means of a switch (3) and the supply network load resistor (4), a measured value acquisition element (16) for detecting the voltage breakdown and the open circuit voltage and has a computer unit (12), the setting means for the x-ray tube voltage and the milliampere-seconds product are assigned and the stored x-ray tube exposure data before triggering the exposure each calculate the maximum permissible x-ray tube current with the shortest exposure time. According to the invention, the value of the collapsed voltage (U network / load ) and the open circuit voltage (U network / empty ) is measured by the computer unit (12) and the network internal resistance R i / network ), its value and the respective current value of the open circuit network voltage are calculated therefrom are held in a memory (13), whereupon a comparison is made between a calculated mains voltage to be expected during the x-ray exposure and the stored value of a reference mains voltage and, depending on the comparison result, either a control signal for releasing the x-ray exposure is formed or a correspondingly reduced x-ray tube current value and a correspondingly extended recording time can be issued.

EP19890108298 1988-07-19 1989-05-09 Method for automatically matching an x-ray diagnostic generator with the mains resistance, and the x-ray diagnostic generator Withdrawn EP0351508A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DD318053 1988-07-19
DD31805488A DD281687B5 (en) 1988-07-19 1988-07-19 Roentgeniagnosticgenerator with selbsttaetiger adaptation to the feed resistor
DD31805388A DD281686B5 (en) 1988-07-19 1988-07-19 Method for self-adapting a Roentgendiagnostikgenerators to the feed resistor
DD318054 1988-07-19

Publications (2)

Publication Number Publication Date
EP0351508A2 EP0351508A2 (en) 1990-01-24
EP0351508A3 true EP0351508A3 (en) 1991-03-20

Family

ID=25748222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890108298 Withdrawn EP0351508A3 (en) 1988-07-19 1989-05-09 Method for automatically matching an x-ray diagnostic generator with the mains resistance, and the x-ray diagnostic generator

Country Status (1)

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EP (1) EP0351508A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332417A1 (en) * 2003-07-16 2005-02-24 Sirona Dental Systems Gmbh Method for controlling an X-ray device and X-ray device
PL2624667T3 (en) * 2010-09-28 2017-09-29 Sociedad Española De Electromedicina Y Calidad, S. A. Method for the automatic control of maximum power for x-ray apparatuses, and device required for same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134403A1 (en) * 1971-04-24 1972-12-08 Siemens Ag
DE2756869A1 (en) * 1976-12-29 1978-07-13 Elin Union Ag X=ray generator protection circuit - guards against changes in supply impedance by comparing actual anode voltage with desired value (NL 3.7.78)
DE3610438A1 (en) * 1986-03-27 1987-10-01 Siemens Ag MEDIUM FREQUENCY X-RAY DIAGNOSTIC GENERATOR
US4811374A (en) * 1986-11-13 1989-03-07 Medicor Usa Ltd. Apparatus for setting exposure parameters of an X-ray generator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57132700A (en) * 1981-02-12 1982-08-17 Toshiba Corp X-ray apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134403A1 (en) * 1971-04-24 1972-12-08 Siemens Ag
DE2756869A1 (en) * 1976-12-29 1978-07-13 Elin Union Ag X=ray generator protection circuit - guards against changes in supply impedance by comparing actual anode voltage with desired value (NL 3.7.78)
DE3610438A1 (en) * 1986-03-27 1987-10-01 Siemens Ag MEDIUM FREQUENCY X-RAY DIAGNOSTIC GENERATOR
US4811374A (en) * 1986-11-13 1989-03-07 Medicor Usa Ltd. Apparatus for setting exposure parameters of an X-ray generator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 230 (E-142)[1108], 16. November 1982; & JP-A-57 132 700 (TOKYO SHIBAURA DENKI K.K.) 17-08-1982 *

Also Published As

Publication number Publication date
EP0351508A2 (en) 1990-01-24

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