EP0480096A1 - Appareil pour diagnostic aux rayons X comprenant un intensificateur d'image à rayons X et un détecteur de brillance d'image sur son écran de sortie - Google Patents

Appareil pour diagnostic aux rayons X comprenant un intensificateur d'image à rayons X et un détecteur de brillance d'image sur son écran de sortie Download PDF

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Publication number
EP0480096A1
EP0480096A1 EP90119637A EP90119637A EP0480096A1 EP 0480096 A1 EP0480096 A1 EP 0480096A1 EP 90119637 A EP90119637 A EP 90119637A EP 90119637 A EP90119637 A EP 90119637A EP 0480096 A1 EP0480096 A1 EP 0480096A1
Authority
EP
European Patent Office
Prior art keywords
detector
detector elements
elements
detector according
measuring field
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
EP90119637A
Other languages
German (de)
English (en)
Other versions
EP0480096B1 (fr
Inventor
Horst Dipl.-Phys. Dr. Rer. Nat. Aichinger
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
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
Priority to DE59006446T priority Critical patent/DE59006446D1/de
Priority to EP90119637A priority patent/EP0480096B1/fr
Priority to US07/754,073 priority patent/US5164583A/en
Priority to JP29074691A priority patent/JP3188293B2/ja
Publication of EP0480096A1 publication Critical patent/EP0480096A1/fr
Application granted granted Critical
Publication of EP0480096B1 publication Critical patent/EP0480096B1/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
    • H05G1/26—Measuring, controlling or protecting
    • 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
    • H05G1/38—Exposure time
    • H05G1/42—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
    • H05G1/44—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube in which the switching instant is determined by measuring the amount of radiation directly
    • 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 a detector for the image brightness on the output screen of an X-ray image intensifier with a matrix of detector elements.
  • a detector of this type makes it possible to select the detector elements in the matrix in such a way that the respectively desired measuring field for the detection of the actual value of the dose rate is formed. Compared to using a photomultiplier as a detector, there is a much larger number of measuring fields that can be selected.
  • the detector elements are all of the same size and shape. It has been shown that not all measuring fields that are desirable in practice can be realized in this way.
  • the invention is based on the object of designing a detector of the type mentioned at the outset such that the shape of the selectable measuring fields can be adapted more optimally to the requirements in an organ-specific manner than in the prior art.
  • the detector elements have different shapes and / or sizes. This makes it possible to implement square, rectangular or polygonal measuring fields as required.
  • An expedient development of the invention consists in that the detector elements grouped around the center are triangular in such a way that a polygonal central measuring field can be selected. This measuring field can be approximated to a round measuring field, which is desirable for some applications.
  • Another embodiment of the invention is that the detector sits on a connection plate which carries integrated circuits for the detector elements on its rear side. Both the detector itself and the associated circuits, in particular switches for selecting the detector elements and amplifiers, are mounted on a single connection plate.
  • This connection plate can be arranged adjustable in a housing, so that an adjustment is possible. In this case, a cable for connection to the outside can be led out of the housing.
  • FIG. 1 shows an X-ray tube 1, which is fed by an X-ray generator 2.
  • a patient 3 is penetrated by the X-rays.
  • the X-ray radiation spatially modulated thereby falls on the input of the X-ray image intensifier 4, which converts the intensity distribution of the X-ray radiation into a visible image of high luminance on the output screen.
  • This image is recorded by a television camera and displayed on a display unit 7 via a television center 6.
  • a semiconductor detector 8 is provided as an actual value transmitter, which supplies a corresponding signal to the actual value input of a comparator 9 via a measuring transducer 10.
  • the comparator 9 has a setpoint input 11, at which there is a signal corresponding to the setpoint of the average image brightness in the measuring field of the output screen of the X-ray image intensifier 4.
  • the x-ray generator 2 is influenced by a brightness control device 13 in the sense of an adjustment of the actual value to the target value.
  • a setpoint generator 12 is provided for setting the setpoint.
  • the semiconductor detector 8 has a surface on which the entire output image of the X-ray image intensifier 4 or a part thereof can be reproduced (by varying the focal length of the optics), with the aid of a partially transparent mirror 14 in the beam path between the output fluorescent screen of the X-ray image intensifier 4 and the television camera 5
  • a control device 15 electronically selects one or more areas of the semiconductor detector 8 in accordance with the desired measuring field.
  • the semiconductor detector 8 allows the selection of a large number of measuring fields, both with regard to their position and their shape and size.
  • FIG. 2 shows an example of a semiconductor detector 8 in an enlarged view.
  • This semiconductor detector 8 consists of a matrix of photodiode elements 8a, 8b etc., which are connected to connections 17 via wires 16. 2, the photodiode elements 8a etc. have different shapes and sizes. For example, the photodiode elements 8a and 8e, 8b and 8d, 8g and 8i each have the same shape and area.
  • the photodiode elements 8a, 8e are larger than the photodiode elements 8b, 8c and 8d.
  • the photodiode elements 8g, 8i, etc. are triangular.
  • the photodiode elements 8a etc. are individual to form the desired measuring field selectable.
  • 3 shows an example for the selection of photodiode elements.
  • the dark areas represent the selected measuring field, which is suitable for a colon overview image.
  • the selected measuring field must also be oriented. Accordingly, it can also be in accordance with FIGS. 4 to 6.
  • 3 to 6 show that the darkly drawn measuring field can be rotated electronically by appropriately selecting the photodiode elements 8a, etc., in the example in 90 ° steps.
  • FIG. 7 shows darkly a central measuring field which is approximated to a round measuring field and which is formed with the aid of the triangular-shaped photodiode elements 8g etc.
  • This measuring field is e.g. suitable for heart and skull images.
  • Additional measuring fields of different shape and size can be selected by appropriately selecting the photodiode elements 8a, etc.
  • FIG. 8 shows the semiconductor detector 8 with the connections 17 on a substrate 18.
  • the substrate 18 is arranged on a connection plate 19, which is provided with a flexible printed circuit board 20.
  • Integrated circuits 21 are arranged on the rear side of the connecting plate 19 and are electrically connected to one another, to the connections 17 and to the flexible printed circuit board 20 by means of wires 22.
  • the integrated circuits 21 contain the switches for selecting the photodiode elements 8a etc. and the amplifiers.
  • Fig. 8 shows that a compact structure with the help of the connecting plate 19 is possible.
  • the different sizes of the photodiode elements 8a etc. have been achieved.
  • the different shapes are determined by dividing the photodiode elements, e.g. achieved to form the triangular photodiode elements 8g, 8i, etc.
  • These triangular-shaped photodiode elements 8g, 8i etc. make it possible to select a polygonal central measuring field.
  • the semiconductor detector 8 can also be used instead of an ionization chamber for direct recording. In this case, it causes the X-ray tube 1 to be switched off automatically after a predetermined dose has been reached. In this case too, an optimal choice of the measuring field determining the dose is possible.
  • FIG. 2 shows that light-emitting diodes 23 are provided at the crossing points of the photodiode elements 8a etc. Only two such light-emitting diodes 23 are shown in FIG. 2. Such light-emitting diodes can be provided at all crossing points. These light emitting diodes are controlled by the control device 15 and optically mark the respectively selected measuring field. The light emitted by the light-emitting diodes 23 is recorded via the television camera 5, so that the respectively selected measuring field is optically represented in the x-ray image on the display device 7.
  • the signals of each of the photodiode elements 8a etc. can be evaluated simultaneously.
  • the arithmetic mean or the peak value of these signals can be formed.
  • These signals can also be weighted as a function of the organ recorded in each case.
  • the light-insensitive areas between the photodiode elements 8a etc., e.g. 2 in the form of dividing lines can be provided with a metallization which, when illuminated, makes the boundaries of the photodiode elements 8a etc. visible and thus the actual position of the built-in detector on the display device 7.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • X-Ray Techniques (AREA)
EP90119637A 1990-10-12 1990-10-12 Appareil pour diagnostic aux rayons X comprenant un intensificateur d'image à rayons X et un détecteur de brillance d'image sur son écran de sortie Expired - Lifetime EP0480096B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59006446T DE59006446D1 (de) 1990-10-12 1990-10-12 Röntgendiagnostikanlage mit einem Röntgenbildverstärker und einem Detektor für die Bildhelligkeit auf dessen Ausgangsschirm.
EP90119637A EP0480096B1 (fr) 1990-10-12 1990-10-12 Appareil pour diagnostic aux rayons X comprenant un intensificateur d'image à rayons X et un détecteur de brillance d'image sur son écran de sortie
US07/754,073 US5164583A (en) 1990-10-12 1991-09-03 Matrix of image brightness detector's elements formed by different groups of different shape or size
JP29074691A JP3188293B2 (ja) 1990-10-12 1991-10-09 Ｘ線検査装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90119637A EP0480096B1 (fr) 1990-10-12 1990-10-12 Appareil pour diagnostic aux rayons X comprenant un intensificateur d'image à rayons X et un détecteur de brillance d'image sur son écran de sortie

Publications (2)

Publication Number Publication Date
EP0480096A1 true EP0480096A1 (fr) 1992-04-15
EP0480096B1 EP0480096B1 (fr) 1994-07-13

Family

ID=8204613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119637A Expired - Lifetime EP0480096B1 (fr) 1990-10-12 1990-10-12 Appareil pour diagnostic aux rayons X comprenant un intensificateur d'image à rayons X et un détecteur de brillance d'image sur son écran de sortie

Country Status (4)

Country Link
US (1) US5164583A (fr)
EP (1) EP0480096B1 (fr)
JP (1) JP3188293B2 (fr)
DE (1) DE59006446D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857009A1 (fr) * 1997-01-27 1998-08-05 Philips Patentverwaltung GmbH Appareil à rayons X comportant un diaphragme primaire

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06153077A (ja) * 1992-11-10 1994-05-31 Hitachi Medical Corp Ｘ線ｔｖカメラ装置
DE4300829C2 (de) * 1993-01-14 1996-08-29 Siemens Ag Röntgendiagnostikeinrichtung
US5461658A (en) * 1993-05-21 1995-10-24 U.S. Philips Corporation X-ray examination apparatus
US5528656A (en) * 1994-09-19 1996-06-18 Annis; Martin Method and apparatus for sampling an object
EP0796549B1 (fr) * 1995-10-10 2004-01-07 Koninklijke Philips Electronics N.V. Appareil d'examen par rayons x comprenant un systeme de commande de l'exposition
US5872602A (en) * 1995-12-13 1999-02-16 Johnson; Robert E. Fluoroscopic imaging system with image enhancement apparatus and method
US5867554A (en) * 1996-06-20 1999-02-02 Siemens Aktiengesellschaft Spiral scan computed tomography apparatus having a modular surface detector for radiation
FR2760528B1 (fr) * 1997-03-05 1999-05-21 Framatome Sa Procede et dispositif d'examen photothermique d'un materiau
AU4603400A (en) 1999-05-10 2000-11-21 Yves Chartier Energy selective detection systems
US6795526B2 (en) 2002-03-04 2004-09-21 Ge Medical Systems Global Technology Co., Llc Automatic exposure control for a digital image acquisition system
US7006598B2 (en) * 2002-08-09 2006-02-28 Canon Kabushiki Kaisha Imaging method and apparatus with exposure control
US7148487B2 (en) 2002-08-27 2006-12-12 Canon Kabushiki Kaisha Image sensing apparatus and method using radiation
US7309330B2 (en) 2004-07-20 2007-12-18 Medtronic, Inc. Implantable cerebral spinal fluid drainage device and method of draining cerebral spinal fluid
WO2007148262A1 (fr) * 2006-06-22 2007-12-27 Philips Intellectual Property & Standards Gmbh Appareil d'imagerie à rayons x et procédé de formation de l'image d'un objet sous examen
KR101911314B1 (ko) * 2012-03-30 2018-10-24 삼성전자주식회사 엑스선 검출기
IL278076B2 (en) * 2018-04-20 2025-08-01 Asml Netherlands Bv Pixel shape and section shape selection for large active area high speed detector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414682A (en) * 1980-11-17 1983-11-08 American Science And Engineering, Inc. Penetrating radiant energy imaging system with multiple resolution
DE3225061A1 (de) * 1982-07-05 1984-01-05 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikeinrichtung
EP0217456A1 (fr) * 1985-09-20 1987-04-08 Koninklijke Philips Electronics N.V. Appareil d'examen à rayons X avec un détecteur auxiliaire localement séparé
DE3825703A1 (de) * 1988-07-28 1990-02-01 Siemens Ag Roentgendiagnostikeinrichtung mit rechteckfoermiger detektoranordnung
EP0362427A1 (fr) * 1988-10-05 1990-04-11 Siemens Aktiengesellschaft Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402888A1 (de) * 1984-01-27 1985-08-01 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikanlage
JP2606207B2 (ja) * 1987-03-25 1997-04-30 株式会社島津製作所 画像撮影装置
DE8714009U1 (de) * 1987-10-19 1989-02-16 Siemens AG, 1000 Berlin und 8000 München Röntgendiagnostikvorrichtung
JP2890553B2 (ja) * 1989-11-24 1999-05-17 株式会社島津製作所 Ｘ線像撮像装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414682A (en) * 1980-11-17 1983-11-08 American Science And Engineering, Inc. Penetrating radiant energy imaging system with multiple resolution
DE3225061A1 (de) * 1982-07-05 1984-01-05 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikeinrichtung
EP0217456A1 (fr) * 1985-09-20 1987-04-08 Koninklijke Philips Electronics N.V. Appareil d'examen à rayons X avec un détecteur auxiliaire localement séparé
DE3825703A1 (de) * 1988-07-28 1990-02-01 Siemens Ag Roentgendiagnostikeinrichtung mit rechteckfoermiger detektoranordnung
EP0362427A1 (fr) * 1988-10-05 1990-04-11 Siemens Aktiengesellschaft Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MEDICAL PHYSICS, Band 11, Nr. 3, Mai/Juni 1984, Seiten 303-310, New York, US; I.A. GUNNINGHAM et al.: "A photodiode array x-ray imaging system for digital angiography" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857009A1 (fr) * 1997-01-27 1998-08-05 Philips Patentverwaltung GmbH Appareil à rayons X comportant un diaphragme primaire

Also Published As

Publication number Publication date
DE59006446D1 (de) 1994-08-18
JP3188293B2 (ja) 2001-07-16
JPH04263837A (ja) 1992-09-18
EP0480096B1 (fr) 1994-07-13
US5164583A (en) 1992-11-17

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