CH157163A - Device to ensure the correctness of the X-ray tube current measurement in X-ray systems with Villard circuitry. - Google Patents

Device to ensure the correctness of the X-ray tube current measurement in X-ray systems with Villard circuitry.

Info

Publication number
CH157163A
CH157163A CH157163DA CH157163A CH 157163 A CH157163 A CH 157163A CH 157163D A CH157163D A CH 157163DA CH 157163 A CH157163 A CH 157163A
Authority
CH
Switzerland
Prior art keywords
ray tube
ray
correctness
villard
current
Prior art date
Application number
Other languages
German (de)
Inventor
Gesells Siemens-Reiniger-Veifa
Original Assignee
Siemens Reiniger Veifa
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 Reiniger Veifa filed Critical Siemens Reiniger Veifa
Publication of CH157163A publication Critical patent/CH157163A/en

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  • X-Ray Techniques (AREA)

Description

  

  Einrichtung zur Sicherung der Richtigkeit der     Röntgenröhrenstrommessung    bei       Röntgenanlagen    mit     TiRard-Schaltungsanordnung.       Bei Einrichtungen zur     Röntgenstrahlen-          erzeugung    mit Kondensatoren und Ventilen in       Villard'scher    Schaltungsanordnung, die ent  sprechend     Abb.   <B>1</B> aus einem     Hochspannungs-          trausformator   <B>1,</B> den Kondensatoren 2,<B>8,</B> der  Ventilröhre 4 und der     Röntgenröhre   <B>5</B> be  stehen, soll der die Kondensatoren ladende  Strom ausschliesslich durch die Ventilröhre,

    der sie entladende Strom ausschliesslich durch  die     Röntgenröhre    fliessen. Ein im Stromkreis  der Röntgenröhre liegendes     Strommessgerät   <B>6</B>  zeigt in diesem Fall den Gebrauchsstrom  richtig an. (Unter Gebrauchsstrom ist hierbei  der Strom verstanden, der in der Röntgen  röhre in dem dazu bestimmten Brennfleck  Röntgenstrahlen erzeugt). Wenn die Röntgen  röhre jedoch in der Richtung     Kathode-Anode     Strom     durchlässt,    was nicht selten, auch ohne       dass    es bemerkt wird, vorkommt, erlauben  die Angaben des     Messgerätes    keine sicheren  Rückschlüsse auf den Gebrauchsstrom. Das    führt zu Fehlbelichtungen oder Überdosie  rungen.  



  Die Richtigkeit der Strommessung     lässt     sich erfindungsgemäss dadurch sichern,     dass,     entsprechend dem Beispiel in     Abb.    2, das  zwischen Röntgenröhre und     Ventilröhre    lie  gende     Messinstrument    in Reihe mit einem  Ventil<B>(7)</B> liegt, welches den Strom in Rich  tung des Nutzstromes     durchlässt,    während  ein zweites Ventil<B>(8)</B> parallel zu dieser     Mess-          anordnung    derart liegt,     dass    es für den die  Röntgenröhre in verkehrter Richtung durch  fliessenden Strom durchlässig ist.  



  Als Ventile<B>7, 8</B> werden zweckmässig       Kupferoxydulgleichrichter    verwendet. Diese  können vorteilhaft in das     Strommessgerät     eingebaut sein.



  Device to ensure the correctness of the X-ray tube current measurement in X-ray systems with TiRard circuitry. In the case of devices for X-ray generation with capacitors and valves in Villard's circuit arrangement, the corresponding Fig. 1 </B> from a high-voltage transformer <B> 1 </B> the capacitors 2, <B> 8, </B> of the valve tube 4 and the X-ray tube <B> 5 </B> exist, the current charging the capacitors should exclusively flow through the valve tube,

    the current discharging them flow exclusively through the X-ray tube. In this case, an ammeter <B> 6 </B> located in the circuit of the X-ray tube correctly displays the current used. (The current used here is understood to mean the current that generates X-rays in the X-ray tube in the designated focal spot). However, if the X-ray tube allows current to pass in the direction of the cathode-anode, which often happens without being noticed, the information provided by the measuring device does not allow any reliable conclusions to be drawn about the current in use. This leads to incorrect exposures or overdosing.



  According to the invention, the correctness of the current measurement can be ensured in that, according to the example in Fig. 2, the measuring instrument located between the X-ray tube and valve tube is in series with a valve <B> (7) </B>, which controls the current in Rich The flow of the useful flow allows through, while a second valve <B> (8) </B> is parallel to this measuring arrangement in such a way that it is permeable to the X-ray tube in the reverse direction through flowing current.



  Copper oxide rectifiers are expediently used as valves 7, 8. These can advantageously be built into the ammeter.

 

Claims (1)

PATENTANSPRUCH: Einrichtung zur Sicherung der Richtig keit der Röntgenröhrenstrommessung bei Röntgenanlagen mit Villard'scher Sehaltungs- anordnung, dadurch gekennzeichnet, dass das zwischen Röntgenröbre und Ventilröhre lie gende Messinstrument in Reihe mit einem Ven til liegt, welches in Richtung des Nutzstromes durchlässig ist, und dass parallel zu dieser Messanordnung ein zweites Ventil derart liegt, PATENT CLAIM: Device to ensure the correctness of the X-ray tube current measurement in X-ray systems with Villard's view arrangement, characterized in that the measuring instrument located between the X-ray tube and the valve tube is in series with a valve which is permeable in the direction of the useful current, and that a second valve is parallel to this measuring arrangement in such a way that dass es für entgegen dem Nutzstrom gerich tete Ströme durchlässig ist. UNTERANSPRüCHE: <B>1.</B> Einrichtung nach Patentanspruch, dadurch gekennzeichnet, dass als Ventile<B>(7, 8)</B> Kupferoxydul-Gleichrichter dienen. 2. Einrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Ventile<B>(7, 8)</B> in das Strommessgerät eingebaut sind. that it is permeable to currents directed against the useful current. SUBClaims: <B> 1. </B> Device according to patent claim, characterized in that copper oxide rectifiers are used as valves (7, 8). 2. Device according to claim, characterized in that the valves <B> (7, 8) </B> are built into the current measuring device.
CH157163D 1930-07-07 1931-07-04 Device to ensure the correctness of the X-ray tube current measurement in X-ray systems with Villard circuitry. CH157163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157163X 1930-07-07

Publications (1)

Publication Number Publication Date
CH157163A true CH157163A (en) 1932-09-15

Family

ID=5678400

Family Applications (1)

Application Number Title Priority Date Filing Date
CH157163D CH157163A (en) 1930-07-07 1931-07-04 Device to ensure the correctness of the X-ray tube current measurement in X-ray systems with Villard circuitry.

Country Status (1)

Country Link
CH (1) CH157163A (en)

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