EP0360906A1 - Intensificateur d'images de rayons X - Google Patents

Intensificateur d'images de rayons X Download PDF

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Publication number
EP0360906A1
EP0360906A1 EP88116129A EP88116129A EP0360906A1 EP 0360906 A1 EP0360906 A1 EP 0360906A1 EP 88116129 A EP88116129 A EP 88116129A EP 88116129 A EP88116129 A EP 88116129A EP 0360906 A1 EP0360906 A1 EP 0360906A1
Authority
EP
European Patent Office
Prior art keywords
ray image
image intensifier
electrodes
ray
electrode
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
EP88116129A
Other languages
German (de)
English (en)
Other versions
EP0360906B1 (fr
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/fr
Priority to US07/405,218 priority patent/US4960987A/en
Priority to JP1989110828U priority patent/JP2584520Y2/ja
Publication of EP0360906A1 publication Critical patent/EP0360906A1/fr
Application granted granted Critical
Publication of EP0360906B1 publication Critical patent/EP0360906B1/fr
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 X-ray image intensifier with a vacuum vessel with an X-ray sensitive input luminescent screen located on one end face and with an electrode system for focusing the electrons generated when X-rays strike the input luminescent screen onto an exit luminescent screen of the X-ray image intensifier arranged on the other end face.
  • 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 phosphor screen on a corresponding point on the output phosphor screen.
  • These electrodes are cylindrical Mige rings each with a bracket attached to the inner wall of the vacuum vessel.
  • 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.
  • the object of the invention is therefore to design an X-ray image intensifier of the type mentioned at the outset in such a way that the production outlay for the electrode system and thus the costs for producing an X-ray image intensifier are reduced.
  • the object is achieved in that the electrodes are applied as a coating on the inside of the wall part of the X-ray image intensifier between the fluorescent screens, which is adapted in its shape to the electrodes and has different diameters adapted to the required electrode diameters over its length.
  • the advantage of the invention is that the electrodes are applied as a coating on the inside of the wall part of the X-ray image intensifier between the fluorescent screens.
  • the manufacture of the electrode system is thus considerably simplified, and there is no need for adjustment and the holders for the electrodes in the vacuum vessel, so that the assembly outlay and the production costs are reduced.
  • the surface of the electrodes is reduced, which has an advantageous effect on the stability of the high vacuum in the vacuum vessel.
  • the surface of the electrodes is reduced because the electrodes are applied as a thin coating on the wall of the X-ray image intensifier. Only the inward-facing surface of the covering can worsen the vacuum, for example due to atoms emerging from the covering.
  • the electrodes are formed by an electrode body with a substantially larger surface area, which are surrounded in their entirety by the vacuum. There by eliminating the holders for the electrodes, the construction volume of the vacuum vessel can be reduced.
  • the cylindrical wall part of the X-ray image intensifier is formed from a one-piece sheet metal part, if an insulation layer is applied to the inside of the sheet metal part and if the electrodes are applied to it.
  • 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.
  • 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.
  • At the output of the X-ray image intensifier 5 is a conventional television chain with an image recording device 11 with a signal ver work unit 12 and a monitor 13 connected.
  • 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 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.
  • FIG. 3 shows that, for example, the cylindrical glass wall of the X-ray image intensifier 5b forms the electrode carrier 14a.
  • the electrode carrier 14a can also be made of an insulating material, e.g. Ceramic or plastic. In these embodiments, the application of an insulation layer can be omitted.
  • the figures show that an electrically conductive coating is applied to areas of the electrode carrier 14, 14a, so that the electrodes 18, 18a and 19, 19a are formed.
  • the conductive coating can be applied to the corresponding areas of the glass wall of the X-ray image intensifier 5b or to the corresponding Be rich of the insulation layer 17 of the X-ray image intensifier 5a by brushing or by a spraying method, such as plasma spraying, can be applied. It is also possible to apply the coating to the entire inner surface of the electrode carrier 14, 14a, that is to say to the insulation layer 17, or to the glass wall of the X-ray image intensifier 5b, in order then to mechanically remove it from areas between adjacent electrodes 18, 18a and 19, 19a , eg loops.
  • a conductor 20 is guided for each electrode 18, 18a, 19, 19a through the electrode carrier 14, 14a to the electrically conductive covering and connected to it.
  • voltage sources (not shown) can be connected to the conductor 20.
  • FIGS. 2 and 3 show an image intensifier 5a, 5b with two electrodes 18, 18a, 19, 19a. 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 FIGS. 2 and 3, 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.
EP88116129A 1988-09-29 1988-09-29 Intensificateur d'images de rayons X Expired - Lifetime EP0360906B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE3889454T DE3889454D1 (de) 1988-09-29 1988-09-29 Röntgenbildverstärker.
EP88116129A EP0360906B1 (fr) 1988-09-29 1988-09-29 Intensificateur d'images de rayons X
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 (fr) 1988-09-29 1988-09-29 Intensificateur d'images de rayons X

Publications (2)

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

Family

ID=8199394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116129A Expired - Lifetime EP0360906B1 (fr) 1988-09-29 1988-09-29 Intensificateur d'images de rayons X

Country Status (4)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0721653A1 (fr) * 1993-09-29 1996-07-17 International Standard Electric Corporation Chambre a vide monolithique pour tube intensificateur d'images.
FR2754385A1 (fr) * 1996-10-09 1998-04-10 Siemens Ag Intensificateur d'image de rayons x comportant un boitier pour la reception d'electrodes
DE19641626A1 (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
US6147446A (en) * 1993-01-22 2000-11-14 Thomson Tubes Electroniques Image converter tube with means of prevention for stray glimmer

Families Citing this family (6)

* 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 (fr) * 1990-03-06 1991-09-11 Siemens Aktiengesellschaft Intensificateur d'images de rayons x avec système d'électrodes
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
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
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151785A (en) * 1937-06-26 1939-03-28 Emi Ltd Electron discharge device
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
US3688146A (en) * 1967-06-09 1972-08-29 Optische Ind De Oude Delft Nv Image amplifier having external electrostatic shield

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB971495A (en) * 1960-10-28 1964-09-30 Mullard Ltd Improvements in and relating to electron-optical image converter tubes
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151785A (en) * 1937-06-26 1939-03-28 Emi Ltd Electron discharge device
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
US3688146A (en) * 1967-06-09 1972-08-29 Optische Ind De Oude Delft Nv Image amplifier having external electrostatic shield

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 6, Nr. 3, August 1963, Seite 9, New York, US; Th. O. Mohr et al.: "Insulating aluminiumoxide films" *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6147446A (en) * 1993-01-22 2000-11-14 Thomson Tubes Electroniques Image converter tube with means of prevention for stray glimmer
EP0608168B2 (fr) † 1993-01-22 2001-01-24 Thomson Tubes Electroniques Tube convertisseur d'images, et procédé de fabrication d'un tel tube
EP0721653A1 (fr) * 1993-09-29 1996-07-17 International Standard Electric Corporation Chambre a vide monolithique pour tube intensificateur d'images.
EP0721653A4 (fr) * 1993-09-29 1997-05-28 Int Standard Electric Corp Chambre a vide monolithique pour tube intensificateur d'images.
FR2754385A1 (fr) * 1996-10-09 1998-04-10 Siemens Ag Intensificateur d'image de rayons x comportant un boitier pour la reception d'electrodes
DE19641627A1 (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
DE19641625A1 (de) * 1996-10-09 1998-04-16 Siemens Ag Röntgenbildverstärker mit einem Gefäß zur Aufnahme von Elektroden

Also Published As

Publication number Publication date
JPH0249057U (fr) 1990-04-05
EP0360906B1 (fr) 1994-05-04
JP2584520Y2 (ja) 1998-11-05
US4960987A (en) 1990-10-02
DE3889454D1 (de) 1994-06-09

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