EP0310865A1 - Röntgendiagnostikvorrichtung mit einer Bildverstärker-Fernsehkette - Google Patents

Röntgendiagnostikvorrichtung mit einer Bildverstärker-Fernsehkette Download PDF

Info

Publication number
EP0310865A1
EP0310865A1 EP88115497A EP88115497A EP0310865A1 EP 0310865 A1 EP0310865 A1 EP 0310865A1 EP 88115497 A EP88115497 A EP 88115497A EP 88115497 A EP88115497 A EP 88115497A EP 0310865 A1 EP0310865 A1 EP 0310865A1
Authority
EP
European Patent Office
Prior art keywords
image
image intensifier
ray diagnostic
light
filter disc
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Withdrawn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
EP88115497A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rainer Beierlein
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0310865A1 publication Critical patent/EP0310865A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/04—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/10—Scattering devices; Absorbing devices; Ionising radiation filters
    • 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
    • H05G1/64—Circuit arrangements for X-ray apparatus incorporating image intensifiers

Definitions

  • the invention relates to an X-ray diagnostic device with an image intensifier television chain and an iris diaphragm in the beam path between the image intensifier output screen and an image recording system, the filter disk being formed by an opaque plate with an opaque central area.
  • the iris diaphragm must be closed relatively far. This leads to diffraction effects at the diaphragm edges and thus to a blurred image. This phenomenon can be counteracted by in the beam path before the picture is taken system a filter disc is arranged.
  • this filter disk again has the disadvantage that even if the image receiver requires a high level of brightness, the luminous flux is not necessarily weakened, so that the iris diaphragm must be opened relatively widely.
  • the invention has for its object to provide an X-ray diagnostic device of the type mentioned in such a way that a filter disc, in which the transition of the attenuation of light between the central region and the outer region takes place continuously, can be produced in a simple manner.
  • the opaque area has a star-shaped serrated edge.
  • a light-absorbing layer on the translucent plate can be used for a continuous transition, which has a uniform thickness. Such a layer can be applied in a simple manner. The continuous transition is ensured by the star-shaped serrated edge.
  • the 1 has an x-ray generator 1, which supplies an x-ray tube 2 with heating and high voltage.
  • the X-ray radiation generated by the X-ray tube 2 penetrates a patient 3 and strikes the input fluorescent screen of an X-ray image intensifier 4.
  • the luminous flux 5 emanating from the exit fluorescent screen of the X-ray image intensifier 4 is fed via a semi-transparent mirror 9 on the one hand to a film camera 6 and on the other hand to a television camera 7.
  • the television picture is displayed on a monitor 8.
  • a second semitransparent mirror 10 feeds part of the luminous flux 5 to a light detector 11, which feeds a signal corresponding to the average image brightness on the output fluorescent screen of the X-ray image intensifier 4 to a brightness control device 12 which keeps this average image brightness constant by acting on the X-ray generator 1.
  • an iris diaphragm 13 is arranged in the optical beam path between the latter and the television camera 7.
  • the iris diaphragm 13 allows the luminous flux to the television camera 7 to be adjusted individually and is controlled by the brightness control device 12.
  • a filter disk 14 which, according to FIG. 2, has a central area 15 with strong light attenuation and an outer area 16 with low light attenuation which is concentric with it.
  • the iris diaphragm 13 is wide open, the luminous flux to the television camera 7 is therefore hardly weakened overall by the filter disk 14, while when the iris diaphragm 13 is wide closed it is weakened by the central region 15 is greatly weakened.
  • the smallest aperture required is therefore still relatively large, so that image deterioration due to diffraction effects does not occur.
  • the filter disk 14 can be formed by a glass plate with central light-absorbing vapor deposition.
  • the glass plate of optical quality can be anti-reflective on both sides to avoid residual reflections.
  • the transition between the central region 15 and the outer region 16 is approximately continuous with regard to the weakening of light.
  • the edge of the opaque coating of a translucent plate i.e. the edge of the central region 15 jagged in a star shape according to FIG. 2. If the iris diaphragm 13 completely or partially covers this star-shaped jagged edge, the adjustment of the iris diaphragm 13 results in a continuous increase or decrease in the total light absorption.
  • central region 15 according to FIG. 2 has a star-shaped serrated edge corresponding to a regular octagon.
  • the interaction between the filter disk 14 and the iris diaphragm 13 results in a large dynamic range, with extremely small diaphragm openings being avoided.
  • One filter disc is sufficient for all operating modes.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Radiography Using Non-Light Waves (AREA)
  • X-Ray Techniques (AREA)
EP88115497A 1987-10-06 1988-09-21 Röntgendiagnostikvorrichtung mit einer Bildverstärker-Fernsehkette Withdrawn EP0310865A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8713430 1987-10-06
DE8713430U 1987-10-06
DE8807444U DE8807444U1 (de) 1987-10-06 1988-06-07 Röntgendiagnostikvorrichtung mit einer Bildverstärker-Fernsehkette
DE8807444U 1988-06-07

Publications (1)

Publication Number Publication Date
EP0310865A1 true EP0310865A1 (de) 1989-04-12

Family

ID=25952106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115497A Withdrawn EP0310865A1 (de) 1987-10-06 1988-09-21 Röntgendiagnostikvorrichtung mit einer Bildverstärker-Fernsehkette

Country Status (3)

Country Link
EP (1) EP0310865A1 (enrdf_load_stackoverflow)
JP (1) JPH0168011U (enrdf_load_stackoverflow)
DE (1) DE8807444U1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130050A1 (de) * 1991-09-10 1993-03-18 Siemens Ag Roentgenbildverstaerker mit nachgeschaltetem ccd-wandler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102445C1 (enrdf_load_stackoverflow) * 1991-01-28 1992-03-05 Siemens Ag, 8000 Muenchen, De

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185198A (en) * 1976-07-08 1980-01-22 Tokyo Shibaura Electric Co., Ltd. Means for generating an X-ray exposure command in response to a video signal component
DE2846295A1 (de) * 1978-10-24 1980-05-08 Siemens Ag Roentgenbildverstaerker-fernseheinrichtung
GB2111236A (en) * 1981-12-04 1983-06-29 Elliott Bros Lens system having bullseye filter
EP0193444A1 (fr) * 1985-02-12 1986-09-03 Thomson-Cgr Installation de radiologie à compensation dans un trajet optique de l'image
EP0200623A1 (fr) * 1985-04-19 1986-11-05 Thomson-Cgr Installation de radiologie
FR2582502A1 (fr) * 1985-06-04 1986-12-05 Thomson Cgr Installation de radiologie a compensateur global place dans un trajet optique de l'image

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185198A (en) * 1976-07-08 1980-01-22 Tokyo Shibaura Electric Co., Ltd. Means for generating an X-ray exposure command in response to a video signal component
DE2846295A1 (de) * 1978-10-24 1980-05-08 Siemens Ag Roentgenbildverstaerker-fernseheinrichtung
GB2111236A (en) * 1981-12-04 1983-06-29 Elliott Bros Lens system having bullseye filter
EP0193444A1 (fr) * 1985-02-12 1986-09-03 Thomson-Cgr Installation de radiologie à compensation dans un trajet optique de l'image
EP0200623A1 (fr) * 1985-04-19 1986-11-05 Thomson-Cgr Installation de radiologie
FR2582502A1 (fr) * 1985-06-04 1986-12-05 Thomson Cgr Installation de radiologie a compensateur global place dans un trajet optique de l'image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130050A1 (de) * 1991-09-10 1993-03-18 Siemens Ag Roentgenbildverstaerker mit nachgeschaltetem ccd-wandler

Also Published As

Publication number Publication date
DE8807444U1 (de) 1989-02-02
JPH0168011U (enrdf_load_stackoverflow) 1989-05-01

Similar Documents

Publication Publication Date Title
DE2105259A1 (de) Gerat fur die Röntgenstrahlenfotografie
EP0312850B1 (de) Röntgendiagnostikanlage
EP0151270A1 (de) Röntgendiagnostikanlage
DE4143221A1 (de) Optisches system fuer einen projektor
DE69213418T2 (de) Röntgenbildsystem mit Helligkeitssteuerung
DE69123628T2 (de) Bildanzeige- und -aufnahmegerät
DE1256247B (de) Farbbildwiedergabevorrichtung
DE2813262A1 (de) Fernsehkamera
EP0310865A1 (de) Röntgendiagnostikvorrichtung mit einer Bildverstärker-Fernsehkette
DE2607725B2 (de) Bildaufnahmeröhren-Optik für einen Farbfernsehsignal-Generator
DE3022422C2 (enrdf_load_stackoverflow)
DE1591903A1 (de) Vorrichtung zur fortlaufenden Registrierung,insbesondere hochfrequenter elektrischer Signale
DE4232901A1 (de) Medizinisches Diagnostikgerät mit optimierter Signalerfassung zur Belichtungssteuerung
DE3879598T2 (de) Elektronischer bildabtaster mit variabler steuerung des kontrastes.
DE2610246A1 (de) Farbbild-projektionsvorrichtung
DE69208130T2 (de) Röntgenuntersuchungsapparat mit Filtermittel
DE102019135485B3 (de) Vorrichtung zum Schutz eines Sensors vor Laserstrahlung
DE1903632C3 (de) Bildschirm für eine Dunkelschriftröhre
DE2740998A1 (de) Roentgendiagnostikeinrichtung fuer durchleuchtung
DE2846662A1 (de) Verfahren und vorrichtung zur steuerung der lichtintensitaet in einem optischen system
DE2846295A1 (de) Roentgenbildverstaerker-fernseheinrichtung
DE2904862A1 (de) Roentgenuntersuchungsanordnung
DE29522447U1 (de) Lichttonkopf für einen Tonfilmprojektor
DE2216836C3 (de) Röntgendiagnostikeinrichtung mit einem Röntgenbildverstärker, dessen Ausgangsbild einer Filmkamera zugeführt wird, sowie mit einer Helligkeitsregeleinrichtung
DE2809306A1 (de) Roentgendiagnostikeinrichtung fuer durchleuchtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19891013