EP0383963B1 - Dispositif de radiodiagnostic - Google Patents

Dispositif de radiodiagnostic Download PDF

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Publication number
EP0383963B1
EP0383963B1 EP89102904A EP89102904A EP0383963B1 EP 0383963 B1 EP0383963 B1 EP 0383963B1 EP 89102904 A EP89102904 A EP 89102904A EP 89102904 A EP89102904 A EP 89102904A EP 0383963 B1 EP0383963 B1 EP 0383963B1
Authority
EP
European Patent Office
Prior art keywords
detector
ray image
ray
image intensifier
imaging scale
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
EP89102904A
Other languages
German (de)
English (en)
Other versions
EP0383963A1 (fr
Inventor
Gerhard Dipl.-Ing. Kütterer
Udo Dipl. Ing. Heinze (FH)
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 DE89102904T priority Critical patent/DE58905549D1/de
Priority to EP89102904A priority patent/EP0383963B1/fr
Priority to JP2039533A priority patent/JPH02246584A/ja
Publication of EP0383963A1 publication Critical patent/EP0383963A1/fr
Priority to US07/647,700 priority patent/US5155753A/en
Application granted granted Critical
Publication of EP0383963B1 publication Critical patent/EP0383963B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H05G1/36—Temperature of anode; Brightness of image power

Definitions

  • the invention relates to an X-ray diagnostic device for generating X-ray images with an X-ray image intensifier and a detector for measuring the average image brightness in a dominant area of the output screen of the X-ray image intensifier.
  • Devices of this type are used for television-type image reproduction and for producing individual images and series of images, the detector serving to keep the average image brightness constant in the dominant region.
  • Such an X-ray diagnostic device is described in DE-A-31 27 648, in which, in the parallel beam path of the optics arranged between the output fluorescent screen of the X-ray image intensifier and the television camera, a part is masked out by a mirror which is fed to a detector with a selectable dominant range.
  • the selection can be made using a dominant disc upstream of a photomultiplier or a sheet-like element with a plurality of light-sensitive areas which can be controlled individually. There are limits to the size, shape, position and size of the dominant area through the dominant disc.
  • DE-A-35 26 687 describes an X-ray diagnostic device in which the image size of the X-ray image intensifier can be varied so that output images of different sizes appear on the exit fluorescent screen. This is linked to the control of the scanning surface of the target of the television camera, so that the entire output image of the X-ray image intensifier depicted on the target of the television camera is completely scanned. However, an independent change of the scanning area of the target of the television camera is not provided, so that an optional setting of a dominant area is not possible. A detector for detecting the image brightness in a dominant area is not provided.
  • the invention is based on the object of creating an X-ray diagnostic device of the type mentioned at the outset, in which the options for selecting the dominant area are increased.
  • the object is achieved in that means are available which are the optical imaging scale for the detector change with respect to the output image of the X-ray image intensifier. This ensures that several different sizes can be set in a simple manner for each selected position and shape of the dominant area.
  • the invention is also based on the object of providing an X-ray diagnostic device with a variable imaging scale, for example by electron-optical switching of the X-ray image intensifier by means of setting means, in which the measuring fields can remain the same when the X-ray image intensifier is switched electronically.
  • the means are coupled to the setting means in such a way that when the electron-optical imaging scale of the X-ray image intensifier is adjusted, the optical imaging scale for the detector is changed accordingly, so that the dominant range detected by the detector remains the same with respect to the X-ray image . This ensures that the position, shape and size of the dominant with respect to the examined object remains the same when switching the imaging scale.
  • a simple change in the imaging scale for the detector is obtained if the means have two optics upstream of the detector, the distance between which is changed accordingly when the imaging scale of the X-ray image intensifier is changed, and if an adjusting device is provided for the detector, which causes the detector to always be is in the focus of the optical arrangement.
  • a simple construction of the detector and an electronic switchover can be achieved if the detector consists of a matrix of light-sensitive areas, which can be connected to a measuring amplifier individually or in groups.
  • a representation of the orientation of the detector to the object and the determination of the imaging scale for adjustment and service purposes can be achieve if openings are provided in the detector with a defined position to the individual light-sensitive surfaces and if an illumination device is arranged behind the detector, through which the openings can be faded into the X-ray image to control the position of the dominant area.
  • the device can also be used advantageously in a detector consisting of a multiplier, which is preceded by an adjustable dominant disc for fading in the desired part of the x-ray image.
  • FIG. 1 shows an X-ray tube 1, which is operated by a high-voltage generator 2 and emits a beam of rays that passes through a patient 3 and throws a radiation image onto the fluorescent screen of an X-ray image intensifier 4.
  • the X-ray image intensifier 4 converts the radiation image into a visible image on the exit fluorescent screen.
  • An optics 5 is coupled to the x-ray image intensifier 4, which contains a base lens 6 and a camera lens 7. Through these lenses 6 and 7, the output image of the X-ray image intensifier 4 is imaged on a television camera 8.
  • the output signal of the television camera 8 is reproduced in a video amplifier 9 on a monitor 10.
  • a mirror 12 is arranged in the parallel beam path 11 between the base lens 6 and the camera lens 7, which deflects part of the parallel beams laterally out of the parallel beam path 11.
  • Another optical system 13 generates an image on a detector 14.
  • the detector 14 is connected to a measuring amplifier, not shown, arranged in a control device 15.
  • the control device 15 has an adjuster 16 for the setpoint value of the brightness and is connected to the high-voltage generator 2 for exposure control.
  • control device 15 has first setting means 17, by means of which the high voltages of the electrodes of the X-ray image intensifier 4 can be adjusted, so that the electron optics can be switched over and different imaging scales can be used let set.
  • second adjustment means 18 are provided on the control device 15, which are connected to an adjustment device 19, which causes a change in the imaging scale of the optics 13 and the detector 14.
  • the adjusting device 19 can consist, for example, of motor-driven cam disks which act on the detector 14 and the optics 13.
  • the mirror 12 which can also be formed by a prism, is arranged in the parallel beam path 11.
  • a first lens 20 of the optics 13 is arranged in front of the mirror surface.
  • a second lens 21 is arranged at a distance behind the mirror 12 in front of the detector 14, which is located at the focal point of the optical arrangement, formed from the two lenses 20 and 21.
  • This arrangement shown in FIG 2 corresponds to the smallest optical imaging scale.
  • the X-ray image intensifier is set by the first setting means 17 in such a way that the total input surface of the X-ray image intensifier is completely imaged on the output fluorescent screen of the X-ray image intensifier 4.
  • the optics 13 is set so that the output image of the X-ray image intensifier 4 is imaged on the detector 14.
  • FIG. 3 shows an arrangement with a larger optical imaging scale.
  • the second lens 21 and the detector 14 were adjusted by the adjusting device 19 such that the exit fluorescent screen is now only imaged on part of the detector 14. Since this is normally coupled with the adjustment of the imaging scale of the X-ray image intensifier 4, this means that a smaller part of the input fluorescent screen of the X-ray image intensifier 4 is imaged on the entire output fluorescent screen of the X-ray image intensifier 4, so that the objects on the exit fluorescent screen of the X-ray image intensifier 4 appear enlarged.
  • Such a detector 14 is shown in FIG.
  • a plurality of photosensitive surfaces 23 are arranged in a matrix on a disk 22. These light-sensitive surfaces 23 are connected to the control device 15 and can be connected to the measuring amplifier individually or in groups in order to select the dominant.
  • bores 24 can be provided in the disk 22, through which the images of the bores 24 via the mirror 12 and the base lens 6 on the output fluorescent screen of the x-ray image intensifier are arranged by means of a lighting device (not shown) arranged behind the detector 14 4 can be imaged so that they can be captured by the camera 8 and displayed on the monitor 10. An assignment of the position of the individual areas can thereby be determined.
  • FIG. 5 shows a further possibility for a detector 14 which, in a manner known per se, consists of a dominant disk 25 which is arranged upstream of a detector 26, for example a photomultiplier.
  • a detector 14 which, in a manner known per se, consists of a dominant disk 25 which is arranged upstream of a detector 26, for example a photomultiplier.
  • An x-ray diagnostic device is thus obtained by changing the imaging scale by means of the first setting means 17 the imaging scale of the X-ray image intensifier 4 is changed together with the imaging scale for the detector 14, so that a dominant once selected by second setting means 18 remains assigned to the same object in the same size. Furthermore, by adjusting the second setting means 18, the size and position of the dominant can be changed continuously, so that given the dimensions of the light-sensitive surfaces 23 of the detector 14 or the opening in the dominant disk 25, several settings result for each possibility.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • X-Ray Techniques (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Claims (6)

  1. Appareil de radiodiagnostic servant à produire des radiographies et comportant un amplificateur de brillance radiologique (4) ainsi qu'un détecteur (14) pour mesurer la luminosité moyenne de l'image dans une zone dominante de l'écran de sortie de l'amplificateur de brillance radiologique (4), caractérisé par le fait qu'il est prévu des moyens (13,19), qui modifient l'échelle de grandissement optique pour le détecteur (14), en fonction de l'image de sortie de l'amplificateur de brillance radiologique (4).
  2. Appareil de radiodiagnostic suivant la revendication 1, dans lequel l'échelle de grandissement électroptique de l'amplificateur de brillance radiologique (4) peut être modifiée à l'aide de moyens de réglage, caractérisé par le fait que les moyens (13,19) sont couplés aux moyens de réglage (17) de telle sorte que, lors du réglage de l'échelle de grandissement de l'amplificateur de brillance radiologique (4), cette échelle de grandissement est modifiée de façon correspondante pour le détecteur (14) de sorte que la zone dominante détectée par le détecteur (14) reste identique par rapport à la radiographie.
  3. Appareil de radiodiagnostic suivant la revendication 1 ou 2, caractérisé par le fait que les moyens comportent deux systèmes optiques (20,21) qui sont montés en amont du détecteur (14) et dont la distance est modifiée de façon correspondante, lors d'une variation de l'échelle de grandissement de l'amplificateur de brillance radiologique (4), et qu'il est prévu pour le détecteur (14) un dispositif de réglage (19) qui agit de sorte que le détecteur (14) est toujours situé au foyer du dispositif optique (20,21).
  4. Appareil de radiodiagnostic suivant l'une des revendications 1 à 3, caractérisé par le fait que le détecteur (14) est constitué par une matrice de surfaces photosensibles (23), qui peuvent être raccordées respectivement et individuellement ou par groupes à un amplificateur de mesure.
  5. Appareil de radiodiagnostic suivant la revendication 4, caractérisé par le fait que dans le détecteur (14) il est prévu des ouvertures (24) possédant une position définie par rapport aux différentes surfaces photosensibles (23) et qu'en arrière du détecteur (14) est prévu un dispositif d'éclairement, au moyen duquel les ouvertures (24) peuvent être insérées dans la radiographie pour le contrôle de la position de la zone dominante.
  6. Appareil de radiodiagnostic suivant l'une des revendications 1 à 3, caractérisé par le fait que le détecteur (14) est formé par un multiplicateur (26), devant lequel est disposé un disque réglable (25) déterminant la roue dominante servant à incruster la partie désirée de la radiographie.
EP89102904A 1989-02-20 1989-02-20 Dispositif de radiodiagnostic Expired - Lifetime EP0383963B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE89102904T DE58905549D1 (de) 1989-02-20 1989-02-20 Röntgendiagnostikeinrichtung.
EP89102904A EP0383963B1 (fr) 1989-02-20 1989-02-20 Dispositif de radiodiagnostic
JP2039533A JPH02246584A (ja) 1989-02-20 1990-02-19 Ｘ線診断装置
US07/647,700 US5155753A (en) 1989-02-20 1991-01-29 X-ray diagnostics installation which permits adjustment of the position or size of the dominant region of the image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89102904A EP0383963B1 (fr) 1989-02-20 1989-02-20 Dispositif de radiodiagnostic

Publications (2)

Publication Number Publication Date
EP0383963A1 EP0383963A1 (fr) 1990-08-29
EP0383963B1 true EP0383963B1 (fr) 1993-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102904A Expired - Lifetime EP0383963B1 (fr) 1989-02-20 1989-02-20 Dispositif de radiodiagnostic

Country Status (4)

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US (1) US5155753A (fr)
EP (1) EP0383963B1 (fr)
JP (1) JPH02246584A (fr)
DE (1) DE58905549D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6175614B1 (en) * 1999-05-07 2001-01-16 Oec Medical Systems, Inc. Method and apparatus for automatic sizing and positioning of ABS sampling window in an x-ray imaging system
DE10332596B4 (de) * 2003-07-17 2011-11-17 Siemens Ag Röntgeneinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577374A1 (fr) * 1985-02-08 1986-08-14 Thomson Cgr Procede de reglage automatique d'exposition dans une installation de radiologie, et installation de radiologie mettant en oeuvre un tel procede

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1210035B (de) * 1965-02-06 1966-02-03 C H F Mueller G M B H Anordnung zur elektrischen UEbertragung von Roentgenbildern
DE3127648A1 (de) * 1981-07-13 1983-01-20 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikvorrichtung
NL8200852A (nl) * 1982-03-03 1983-10-03 Philips Nv Roentgenonderzoekinrichting.
JPS6135687A (ja) * 1984-07-27 1986-02-20 Toshiba Corp Ｘ線診断装置
NL8502569A (nl) * 1985-09-20 1987-04-16 Philips Nv Roentgenonderzoekapparaat met een locaal opgedeelde hulpdetector.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577374A1 (fr) * 1985-02-08 1986-08-14 Thomson Cgr Procede de reglage automatique d'exposition dans une installation de radiologie, et installation de radiologie mettant en oeuvre un tel procede

Also Published As

Publication number Publication date
JPH02246584A (ja) 1990-10-02
EP0383963A1 (fr) 1990-08-29
DE58905549D1 (de) 1993-10-14
US5155753A (en) 1992-10-13

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