EP0360906B1 - Röntgenbildverstärker - Google Patents

Röntgenbildverstärker Download PDF

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Publication number
EP0360906B1
EP0360906B1 EP88116129A EP88116129A EP0360906B1 EP 0360906 B1 EP0360906 B1 EP 0360906B1 EP 88116129 A EP88116129 A EP 88116129A EP 88116129 A EP88116129 A EP 88116129A EP 0360906 B1 EP0360906 B1 EP 0360906B1
Authority
EP
European Patent Office
Prior art keywords
image intensifier
ray image
electrodes
wall part
cylindrical wall
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 - Lifetime
Application number
EP88116129A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0360906A1 (de
Inventor
Richard Frank
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
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE3889454T priority Critical patent/DE3889454D1/de
Priority to EP88116129A priority patent/EP0360906B1/de
Priority to US07/405,218 priority patent/US4960987A/en
Priority to JP1989110828U priority patent/JP2584520Y2/ja
Publication of EP0360906A1 publication Critical patent/EP0360906A1/de
Application granted granted Critical
Publication of EP0360906B1 publication Critical patent/EP0360906B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/501—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electrostatic electron optic system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/88—Coatings
    • H01J2229/885—Coatings having particular electrical insulation properties

Definitions

  • the invention relates to an image intensifier with a vacuum vessel with an entrance fluorescent screen located on one end face and with an electrode system for focusing electrons on an exit fluorescent screen arranged on the other end face, a cylindrical wall part of the vacuum vessel between the entrance fluorescent screen and the exit fluorescent screen having different diameters, and wherein the Electrodes are each applied as a coating on the inside of the wall part in the area of the different diameter.
  • X-ray image intensifiers are used in X-ray diagnostics in order to convert an X-ray silhouette generated when X-rays are X-rayed to a patient into a visible image.
  • a television recording tube is connected, the output signals of which are fed to a monitor via a television chain.
  • the examination area is displayed as an image on the monitor.
  • the X-ray image intensifier has a vacuum vessel with an input fluorescent screen with a photocathode located on one end face and an electrode system for accelerating and focusing the electrons generated when X-rays strike the input fluorescent screen onto an output fluorescent screen of the X-ray image intensifier arranged on the other end face.
  • the electrode system has a plurality of cylindrical or ring-shaped electrodes with different diameters, to which different voltages are applied, in order to focus the electrons generated at a point on the input luminescent screen onto a corresponding point on the Home screen.
  • Electrodes are attached to the inner wall of the vacuum vessel as cylindrical rings, each with a holder.
  • the manufacture of the electrode system is very complex since each electrode has to be manufactured individually.
  • a holder must be provided for each electrode in order to hold it in the vacuum vessel.
  • the assembly time is increased because the electrodes have to be adjusted.
  • an image intensifier is known with a glass vacuum vessel with an entrance fluorescent screen located on one end face and with an electrode system for focusing electrons on an exit fluorescent screen arranged on the other end face.
  • a cylindrical wall part of the vacuum vessel which is made of glass and is arranged between the entrance fluorescent screen and the exit fluorescent screen, has different diameters.
  • the electrodes are each applied as a coating on the inside of the wall part in the area of the different diameters.
  • the object of the invention is to design an image intensifier of the type mentioned at the outset, in particular as an X-ray image intensifier, in such a way that the production outlay for the electrode system and thus the production costs are reduced.
  • the image intensifier is designed as an X-ray image intensifier, that the cylindrical wall part of the X-ray image intensifier is formed from a one-piece sheet metal part, that the shape of the cylindrical wall part is adapted to the electrodes and, for this purpose, has different lengths adapted to the required electrode diameters Has diameter and that the inside of the sheet metal part has an insulation layer on which the electrodes are applied.
  • the cylindrical wall part of the X-ray image intensifier is formed from a one-piece sheet metal part, that on the inside of the sheet metal part an insulation layer is applied and that the Electruden are applied to this.
  • the electrode system is thus combined to form an overall electrode, as a result of which the production costs and the assembly outlay are low.
  • the surface of the electrodes is reduced, which has an advantageous effect on the stability of the high vacuum in the vacuum vessel. Because the holders for the electrodes are omitted, the construction volume of the vacuum vessel can be reduced.
  • FIG. 1 shows an X-ray diagnostic device with a high-voltage generator 1 which feeds an X-ray tube 2, in the beam path of which there is a patient 3 who generates a radiation image on the fluorescent screen 4 of an X-ray image intensifier 5.
  • the electrons emerging from the input fluorescent screen 4 are focused by the electrodes of an electron optics 6 onto the output fluorescent screen 7 of the X-ray image intensifier 5.
  • Voltage sources 8 to 10 supply the X-ray image intensifier 5 with the required acceleration and deflection voltages.
  • the X-ray image intensifier 5 and the television chain can be used to display the X-ray silhouette generated when the patient 3 is illuminated as an image on the screen of the monitor 13.
  • FIG. 2 shows a first exemplary embodiment of an X-ray image intensifier 5a according to the invention in a sectional, basic illustration.
  • the elements designated in FIG. 1 are provided with the same reference symbols in FIG.
  • the cylindrical wall of the X-ray image intensifier 5a is formed by an electrode carrier 14 which is formed from sheet metal. It is connected to the entrance fluorescent screen 4 and is fused into the glass wall 16 with a fastening edge 15.
  • An insulation layer 17 is applied to the inside of the electrode carrier 14. The thickness of the insulation layer depends on the required operating voltage of the electrodes and the resulting dielectric strength.
  • the insulation layer 17 can consist, for example, of a lacquer, ceramic, glass or advantageously a metal oxide, such as aluminum oxide or aluminum-titanium oxide, which is applied by a spraying method, such as plasma spraying or by brushing.
  • the figure shows that an electrically conductive coating is applied to areas of the electrode carrier 14, so that the electrodes 18 and 19 are formed.
  • the conductive covering can be applied to the corresponding areas the insulation layer 17 of the X-ray image intensifier 5a by brushing or by a spraying method, such as plasma spraying, for example. It is also possible to remove the coating on the entire inner surface of the electrode carrier 14, that is to say on the insulation layer 17, in order to subsequently remove it at regions between adjacent electrodes 18 and 19 by mechanical removal, for example grinding.
  • a conductor 20 is led for each electrode 18, 19, through the electrode carrier 14, to the electrically conductive covering and connected to it.
  • voltage sources (not shown) can be connected to the conductor 20.
  • the exemplary embodiment according to FIG. 2 shows an image intensifier 5a with two electrodes 18, 19. It is of course also possible to provide further electrodes and to design the electrode carrier accordingly.
  • the electrode carrier does not have to be stepped, as shown in FIG. 2, it can also be conical. It is essential that the electrodes are formed by an electrically conductive coating which is applied to a one-piece electrode carrier.

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
EP88116129A 1988-09-29 1988-09-29 Röntgenbildverstärker Expired - Lifetime EP0360906B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE3889454T DE3889454D1 (de) 1988-09-29 1988-09-29 Röntgenbildverstärker.
EP88116129A EP0360906B1 (de) 1988-09-29 1988-09-29 Röntgenbildverstärker
US07/405,218 US4960987A (en) 1988-09-29 1989-09-11 X-ray image intensifier with conductive-coat electrodes on insulated metal sidewalls
JP1989110828U JP2584520Y2 (ja) 1988-09-29 1989-09-20 Ｘ線イメージインテンシフアイア

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88116129A EP0360906B1 (de) 1988-09-29 1988-09-29 Röntgenbildverstärker

Publications (2)

Publication Number Publication Date
EP0360906A1 EP0360906A1 (de) 1990-04-04
EP0360906B1 true EP0360906B1 (de) 1994-05-04

Family

ID=8199394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116129A Expired - Lifetime EP0360906B1 (de) 1988-09-29 1988-09-29 Röntgenbildverstärker

Country Status (4)

Country Link
US (1) US4960987A (ja)
EP (1) EP0360906B1 (ja)
JP (1) JP2584520Y2 (ja)
DE (1) DE3889454D1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8903130A (nl) * 1989-12-21 1991-07-16 Philips Nv Helderheidsversterkerbuis met sealverbindingen.
EP0445324A1 (de) * 1990-03-06 1991-09-11 Siemens Aktiengesellschaft Röntgenbildverstärker mit einem Elektrodensystem
JP2502655Y2 (ja) * 1992-12-25 1996-06-26 フタバ産業株式会社 サスペンションメンバ
FR2700889B1 (fr) * 1993-01-22 1995-02-24 Thomson Tubes Electroniques Tube convertisseur d'images, et procédé de suppression des lueurs parasites dans ce tube.
DE69331239T2 (de) * 1993-09-29 2002-10-17 Itt Mfg Enterprises Inc Vakuumkammer für eine bildverstärkerröhre
JP3492777B2 (ja) * 1993-10-29 2004-02-03 株式会社東芝 放射線イメージ増強管及びその製造方法
DE19641627A1 (de) * 1996-10-09 1998-04-16 Siemens Ag Röntgenbildverstärker mit einem Gefäß zur Aufnahme von Elektroden
DE19641625A1 (de) * 1996-10-09 1998-04-16 Siemens Ag Röntgenbildverstärker mit einem Gefäß zur Aufnahme von Elektroden
DE19641626A1 (de) * 1996-10-09 1998-04-16 Siemens Ag Röntgenbildverstärker mit einem Gefäß zur Aufnahme von Elektroden
US9011100B2 (en) 2012-09-12 2015-04-21 Mehmet Nevres ULGEN Demountable propeller
DE102014200515B4 (de) * 2014-01-14 2022-12-01 Siemens Healthcare Gmbh Röntgenbildverstärker

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB499869A (en) * 1937-06-26 1939-01-26 Hans Gerhard Lubszynski Improvements in or relating to electron discharge devices
GB971495A (en) * 1960-10-28 1964-09-30 Mullard Ltd Improvements in and relating to electron-optical image converter tubes
US3417242A (en) * 1965-09-20 1968-12-17 Machlett Lab Inc Image intensification system comprising remote control means for varying the size of the output image
NL149636B (nl) * 1967-06-09 1976-05-17 Optische Ind De Oude Delft Nv Vacuuembuis voor elektronen-optische afbeelding.
US4169239A (en) * 1974-07-26 1979-09-25 Hitachi, Ltd. Electrostatically focusing type image pickup tubes and method of manufacturing the same
JPS6074334A (ja) * 1983-09-30 1985-04-26 Toshiba Corp イメ−ジ管
JPS61153931A (ja) * 1984-12-27 1986-07-12 Toshiba Corp Ｘ線イメ−ジインテンシフアイア

Also Published As

Publication number Publication date
US4960987A (en) 1990-10-02
JPH0249057U (ja) 1990-04-05
EP0360906A1 (de) 1990-04-04
JP2584520Y2 (ja) 1998-11-05
DE3889454D1 (de) 1994-06-09

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