EP0066928A1 - Procédé pour faire fonctionner un générateur de rayons X et générateur à rayons X pour la mise en oeuvre de ce procédé - Google Patents

Procédé pour faire fonctionner un générateur de rayons X et générateur à rayons X pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0066928A1
EP0066928A1 EP82200653A EP82200653A EP0066928A1 EP 0066928 A1 EP0066928 A1 EP 0066928A1 EP 82200653 A EP82200653 A EP 82200653A EP 82200653 A EP82200653 A EP 82200653A EP 0066928 A1 EP0066928 A1 EP 0066928A1
Authority
EP
European Patent Office
Prior art keywords
ray
heating current
filament
tube
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
EP82200653A
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German (de)
English (en)
Other versions
EP0066928B1 (fr
Inventor
Joachim Brendler
Reinhard Von Hacht
Rudolf Ochmann
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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
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Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0066928A1 publication Critical patent/EP0066928A1/fr
Application granted granted Critical
Publication of EP0066928B1 publication Critical patent/EP0066928B1/fr
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
    • H05G1/70—Circuit arrangements for X-ray tubes with more than one anode; Circuit arrangements for apparatus comprising more than one X ray tube or more than one cathode
    • 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
    • H05G1/34—Anode current, heater current or heater voltage of X-ray tube

Definitions

  • the invention relates to a method for operating a R öntgenstrom with an X-ray generator for a plurality of X-ray tubes with a means for setting a Congressstromes for the filament of an x-ray tube in the receiving breaks as well as an X-ray generator, which is determined for this process.
  • the preparation of a recording is usually preceded by a preparation phase in which, among other things, the temperature of the cathode filament is brought to the value required for the recording, but in which the tube voltage is not yet switched on, so that no radiation is yet generated .
  • This V orrungsphase can by a top heating (boosting) the filament are indeed shortened, but not essential, if the risk of burning is to avoid the filament.
  • Stand-by to feed in the operation of breaks in the filament of a later recording to use an X-ray tube R uhenature.
  • the filament temperature and thus also the ohmic resistance of the filament is increased, so that the final temperature of the filament can be reached much faster in a subsequent preparation phase.
  • the quiescent heating current is generally selected so that it has just the right value for the filaments with the highest resistance value. This means that when connecting X-ray tubes with low-resistance filaments, preparation is relatively long processing times are required to achieve the A uf condominiumfall the desired filament temperature.
  • the object of the present invention is to design a method of the type mentioned at the outset such that the final temperature of the filament can be reached more quickly in the preparation phase and to provide an X-ray generator for carrying out this method.
  • the X-ray generator for carrying out this method which is provided with a tube selector for selecting an X-ray tube, a focus selector and with a heating current actuator which is acted upon by a stored heating current, is characterized in that a non-volatile digital memory arrangement having a plurality of ' lines for Different quiescent heating current values are provided, and that the tube selection device is coupled to a device for addressing and calling up the storage arrangement in such a way that for each tube heating filament selected by the tube selection device and the focus selector, a particular storage cell is called up and the content of which is applied to a heating current actuator.
  • the X-ray generator according to the invention has a high-voltage generator 1, to which one of several - in the exemplary embodiment three - X-ray tubes 14, 15, 16 can be connected via a high-voltage switch 2.
  • Each of the X-ray tubes has two filaments 4, 4 ', 5, 5', 6, 6 '.
  • the high-voltage generator therefore comprises, in addition to a high-voltage transformer, two heating current transformers for generating the tube voltage, the primary windings of which can be switched in a known manner by focus selectors and the secondary windings of which supply the heating currents for the filaments of an X-ray tube.
  • the Schustromtransformatoren not shown may be part of a heating current control circuit 3 may be composed of a comparator 31 which compares the actual value of the heating current with a desired value, and from an R egelverEntr 32 which amplifies the control deviation and the turned Schustromtransformator supplies so that the actual value of the heating current largely corresponds to its setpoint.
  • the setpoint of the heating current is supplied by a digital-to-analog converter 7, which is connected to a buffer 8. is bound, which in turn is coupled to a memory 9 designed as a read-only memory (PROM) via a changeover switch 10.
  • the read-only memory 9 contains a first memory area 91, in which the heating current values are stored, as known per se from DE-OS 27 03 420, and a second memory area with memory cells 94, 95 and 96, in which store the quiescent heating current values for the three x-ray tubes 4, 5 and 6 (two quiescent heating current values for each x-ray tube).
  • the changeover switch 10 and the high-voltage changeover switch 2 used for the selection of the x-ray tube and the focus selector are coupled to one another via a control unit, so that the memory cells 94 for the x-ray tube 4, the memory cells 95 for the x-ray tube 5 and the memory cells for the x-ray tube 6 96 take effect, in which the quiescent heating current values measured as described above are stored for each filament. This ensures that, at the start of the preparation time, the filament has such a temperature that only a relatively short period of time is required to reach the final temperature. If the preparation phase is then initiated - which is also signaled to the control unit 11 via the input 12 - there is a switchover to the memory area 91, in which the heating current required for a recording is stored for the X-ray tube in question.
  • the control unit 11 is preferably realized with the aid of a microcomputer, and the read-only memory 9 is accessed with the aid of a bus line which connects the microcomputer with the read-only memory 9 and the buffer memory 8.
  • the control unit 11 and the memory 9 are shown in more detail in FIG. 2.
  • the controller 11 includes a microprocessor 20 (Intel 8086), a clock generator 21 (8284A), an interrupt control circuit 22 (8259A), an eight-way latch 23 (8282) and some other circuitry to be described later.
  • the microprocessor 20 comprises an address / data bus 24 which connects the catch flip-flop 23, the memory 9 '(2732, 2118) and the interrupt control circuit 22 to one another.
  • a erzeug by the microprocessor 20 i 'th address is latched in the latch 23 at the occurrence of a key signal which is the strobe input STB of this circuit is supplied by the microprocessor 20 via a control line of the bus 25th
  • the address can be given on address bus 26 by an output enable signal received by circuit 23 via control bus 25.
  • the signals on the control bus 25 or the address bus 26 are applied to a system bus 27 via driver circuits 28a and 28c (74LS244).
  • the memory 9 ' is connected to the data bus 24 and the address bus 26.
  • the read-only memory 9 or a read-write memory 9a is activated via a memory decoder 29 (N82S137). In operation, the memory decoder 29 receives an address or part thereof from the latch 23 and also a further control signal which indicates whether an input signal is received or an output signal on the system bus 27 via a bidirectional bus driver 28d ( 8286) is to be delivered.
  • the quiescent current operation of the X-ray generator is initiated by a signal at the interrupt input 12, which via the Interrupt control circuit 22 activates the microprocessor, which at this moment could be in a waiting routine (step 4-0 of the flow chart of FIG. 4).
  • the microprocessor 20 reads the number i assigned to the selected x-ray tube and the selected filament of this x-ray tube by giving the assigned address via the catch memory and the bus driver circuit 28 to the system bus 27 and the data via the driver circuit 28d record (step 4-1).
  • the microprocessor 20 selects the address (ADR (i)) of the quiescent heating current value table which is stored in the memory 9. The microprocessor 20 then checks which filament has been selected (large focus (LF) for large tube current, small focus for small tube current - step 4-3). If the large focus is used, the tube number i is increased by a fixed value C (step 4-4). If the small focus is used, step 4-4 is skipped. The address generated in this way is temporarily stored in the buffer memory 23 and the quiescent heating current value can be read out from the memory 9 (step 4-5). As can be seen from this, the switch 10 (FIG. 1) is formed by the catch memory 23 and the decoder 29, respectively.
  • the quiescent heating current value is transferred to the buffer memory 8 via the driver circuit 28d and the system bus 27 (4516 - see FIG. 3) and temporarily stored therein, the inputs of which are connected to the system bus 27.
  • the outputs of the buffer 8 are connected to the digital-to-analog converter 7, the output of which is connected to the quiescent heating current control circuit 3.
  • the X-ray generator then enters the preparation phase (step 4-7).
  • the quiescent heating current values can be programmed in individual memory cells (94 ... 96) each assigned to a tube, expansions being possible by adding memory units, or they can be programmed in collective memories which are created for all tube types that can be connected to the generator, whereby the programming of the control unit or the microcomputer determines the call of the stored values and their assignment to the connected X-ray tubes.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
EP82200653A 1981-06-04 1982-05-28 Procédé pour faire fonctionner un générateur de rayons X et générateur à rayons X pour la mise en oeuvre de ce procédé Expired EP0066928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813122185 DE3122185A1 (de) 1981-06-04 1981-06-04 Verfahren zum betrieb eines roentgengenerators und roentgengenerator zur durchfuehrung dieses verfahrens
DE3122185 1981-06-04

Publications (2)

Publication Number Publication Date
EP0066928A1 true EP0066928A1 (fr) 1982-12-15
EP0066928B1 EP0066928B1 (fr) 1985-09-18

Family

ID=6133892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82200653A Expired EP0066928B1 (fr) 1981-06-04 1982-05-28 Procédé pour faire fonctionner un générateur de rayons X et générateur à rayons X pour la mise en oeuvre de ce procédé

Country Status (4)

Country Link
EP (1) EP0066928B1 (fr)
JP (1) JPS57210600A (fr)
CA (1) CA1193751A (fr)
DE (2) DE3122185A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245160A1 (fr) * 1986-05-06 1987-11-11 General Electric Cgr S.A. Installation de radiologie à réseau de communication
WO1989005564A1 (fr) * 1987-12-04 1989-06-15 General Electric Cgr S.A. Appareil de radio-diagnostic
EP0682466A1 (fr) * 1994-05-11 1995-11-15 Philips Patentverwaltung GmbH Installation de radiologie
WO2017143974A1 (fr) * 2016-02-22 2017-08-31 上海联影医疗科技有限公司 Système et procédé de contrôle d'un filament de tube à rayons x

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829521A (en) * 1958-04-11 1960-03-02 Picker X Ray Corp Waite Mfg Improvements relating to x-ray apparatus
DE2539898A1 (de) * 1975-09-08 1977-03-17 Siemens Ag Roentgendiagnostikapparat mit einem regelkreis fuer einen aufnahme-parameter
DE2542016A1 (de) * 1975-09-20 1977-03-24 Philips Patentverwaltung Schaltungsanordnung zur einstellung des aufnahmestroms einer roentgenroehre
FR2379228A1 (fr) * 1977-01-28 1978-08-25 Philips Nv Circuit pour ajuster l'intensite de courant de tube d'un generateur de rontgen
EP0025688A2 (fr) * 1979-09-13 1981-03-25 Pfizer Inc. Procédé pour l'obtention rapide d'une emission de rayons X stabilisée dans une tube à rayons X

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4310518Y1 (fr) * 1965-07-31 1968-05-08
JPS4510429Y1 (fr) * 1967-02-20 1970-05-13
JPS5621385Y2 (fr) * 1973-05-29 1981-05-20
JPS5424587A (en) * 1977-07-27 1979-02-23 Toshiba Corp X-ray unit
JPS6459720A (en) * 1987-08-28 1989-03-07 Mitsubishi Metal Corp Manufacture of superconductive ceramic processing material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829521A (en) * 1958-04-11 1960-03-02 Picker X Ray Corp Waite Mfg Improvements relating to x-ray apparatus
DE2539898A1 (de) * 1975-09-08 1977-03-17 Siemens Ag Roentgendiagnostikapparat mit einem regelkreis fuer einen aufnahme-parameter
DE2542016A1 (de) * 1975-09-20 1977-03-24 Philips Patentverwaltung Schaltungsanordnung zur einstellung des aufnahmestroms einer roentgenroehre
FR2379228A1 (fr) * 1977-01-28 1978-08-25 Philips Nv Circuit pour ajuster l'intensite de courant de tube d'un generateur de rontgen
EP0025688A2 (fr) * 1979-09-13 1981-03-25 Pfizer Inc. Procédé pour l'obtention rapide d'une emission de rayons X stabilisée dans une tube à rayons X

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245160A1 (fr) * 1986-05-06 1987-11-11 General Electric Cgr S.A. Installation de radiologie à réseau de communication
FR2598583A1 (fr) * 1986-05-06 1987-11-13 Thomson Cgr Installation de radiologie a reseau de communication
US5054044A (en) * 1986-05-06 1991-10-01 Thomson-Cgr Radiology installation with a communications network
WO1989005564A1 (fr) * 1987-12-04 1989-06-15 General Electric Cgr S.A. Appareil de radio-diagnostic
EP0682466A1 (fr) * 1994-05-11 1995-11-15 Philips Patentverwaltung GmbH Installation de radiologie
WO2017143974A1 (fr) * 2016-02-22 2017-08-31 上海联影医疗科技有限公司 Système et procédé de contrôle d'un filament de tube à rayons x

Also Published As

Publication number Publication date
EP0066928B1 (fr) 1985-09-18
JPS57210600A (en) 1982-12-24
CA1193751A (fr) 1985-09-17
JPH0159720B2 (fr) 1989-12-19
DE3266339D1 (en) 1985-10-24
DE3122185A1 (de) 1982-12-30

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