EP0362427A1 - Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image - Google Patents

Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image Download PDF

Info

Publication number
EP0362427A1
EP0362427A1 EP88116488A EP88116488A EP0362427A1 EP 0362427 A1 EP0362427 A1 EP 0362427A1 EP 88116488 A EP88116488 A EP 88116488A EP 88116488 A EP88116488 A EP 88116488A EP 0362427 A1 EP0362427 A1 EP 0362427A1
Authority
EP
European Patent Office
Prior art keywords
detector
detector elements
ray diagnostic
body part
image brightness
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
EP88116488A
Other languages
German (de)
English (en)
Other versions
EP0362427B1 (fr
Inventor
Werner Dipl.-Ing. Dr. Kühnel
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 DE8888116488T priority Critical patent/DE3877960D1/de
Priority to EP88116488A priority patent/EP0362427B1/fr
Priority to US07/410,346 priority patent/US4982418A/en
Priority to JP1989116558U priority patent/JPH087841Y2/ja
Publication of EP0362427A1 publication Critical patent/EP0362427A1/fr
Application granted granted Critical
Publication of EP0362427B1 publication Critical patent/EP0362427B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • H05G1/26—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
    • H05G1/36—Temperature of anode; Brightness of image power
    • 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 system with a detector for the average image brightness in a predetermined area, which is formed by a matrix of detector elements, wherein a control device is present which selects predetermined elements for signal generation.
  • a detector of this type can be used, for example, for automatic exposure control for exposure or fluoroscopy.
  • the average image brightness should be recorded in an area corresponding to the organ or body part to be recorded and kept constant or regulated.
  • the selected measuring field must be adapted as best as possible to the part of the body to be imaged.
  • the invention has for its object to provide an X-ray diagnostic system of the type mentioned in such a way that a large number of measuring fields with a variable shape can be selected, the respectively selected measuring field being optimally adaptable to the particular circumstances.
  • a control device has a memory for a large amount of data sets according to the body parts shown in each case and that a selection device for selecting the respective data set corresponding to the respective body part and a stored absorption profile is present.
  • a typical two-dimensional coarse absorption profile of the fluoroscopic image is stored in the selection device for a body part to be examined. This profile is compared in the sense of a pattern recognition with the currently available signals of the detector elements, from which the exact type and position of the body part to be examined in the image can be determined. The detector elements required for correct exposure of the body part are then automatically selected by the selection device.
  • FIG. 1 shows an X-ray tube 1, which is fed by an X-ray generator 2.
  • a patient 3 is irradiated by the X-rays.
  • the x-ray image is amplified by an x-ray image intensifier 4.
  • the amplified x-ray image appearing on the output screen of the x-ray image intensifier 4 is recorded by a television camera 5 and displayed on a display unit 7 via a television center 6.
  • a semiconductor detector 8 is provided as an actual value transmitter, which feeds 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 the setpoint of the middle one Image brightness is in the measuring field of the output screen of the X-ray image intensifier 4 corresponding signal.
  • 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 an area on which the entire output image of the X-ray image intensifier 4 can be imaged, with the aid of a partially transparent mirror 14 in the beam path between the exit fluorescent screen of the X-ray image intensifier 4 and the television camera 5.
  • a control device 15 selects a predetermined area of the semiconductor detector 8 electronically according to 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.
  • the control device 15 contains a memory 17 for a large number of data records corresponding to the body parts shown in each case.
  • the memory 17 is controlled by a selection device 18 for selecting the respective data record corresponding to the respective body part and an absorption profile stored in the selection device 18.
  • a large amount of information corresponding to the body parts occurring in practice is stored in the selection device 18 as two-dimensional coarse absorption profiles of the fluoroscopic image.
  • the total of the output signals of the detector elements of the semiconductor detector 8, which according to FIG. 2 consists of a matrix of detector elements 16, is compared with the stored absorption profiles in the selection device 18 in the sense of a pattern recognition, from which the exact type and position of the body part to be examined can be seen Let picture determine.
  • the detector elements 16 necessary for the correct exposure of the body part are then automatically selected with the aid of the selection device 18 and the control device 15.
  • FIG. 2 shows that with a correspondingly fine division of the detector 8, an exact adaptation of the predetermined range, within which the mean image brightness is to be kept constant during the fluoroscopy, is possible to the examined body part.
  • the information corresponding to the respective body part and selecting the detector elements 16 can be obtained from the entirety of the output signals of the detector elements 16.
  • the described automatic selection of the measuring field can in principle also be extended to the direct recording technique if the measuring chamber is subdivided sufficiently.
  • a further relief for the examiner is possible if additional information about the exact position of the examined organ is evaluated, e.g. with automatic positioning of a heart contour diaphragm, a corresponding signal.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Closed-Circuit Television Systems (AREA)
  • X-Ray Techniques (AREA)
EP88116488A 1988-10-05 1988-10-05 Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image Expired - Lifetime EP0362427B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8888116488T DE3877960D1 (de) 1988-10-05 1988-10-05 Roentgendiagnostikanlage mit einem detektor fuer die mittlere bildhelligkeit.
EP88116488A EP0362427B1 (fr) 1988-10-05 1988-10-05 Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image
US07/410,346 US4982418A (en) 1988-10-05 1989-09-21 X-ray diagnostics installation having a mean image brightness detector
JP1989116558U JPH087841Y2 (ja) 1988-10-05 1989-10-03 Ｘ線診断装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88116488A EP0362427B1 (fr) 1988-10-05 1988-10-05 Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image

Publications (2)

Publication Number Publication Date
EP0362427A1 true EP0362427A1 (fr) 1990-04-11
EP0362427B1 EP0362427B1 (fr) 1993-01-27

Family

ID=8199427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116488A Expired - Lifetime EP0362427B1 (fr) 1988-10-05 1988-10-05 Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image

Country Status (4)

Country Link
US (1) US4982418A (fr)
EP (1) EP0362427B1 (fr)
JP (1) JPH087841Y2 (fr)
DE (1) DE3877960D1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0429977A2 (fr) * 1989-11-24 1991-06-05 Shimadzu Corporation Appareil pour la production d'images de rayonnement
EP0435528A2 (fr) * 1989-12-26 1991-07-03 General Electric Company Système à rayons X
EP0480096A1 (fr) * 1990-10-12 1992-04-15 Siemens Aktiengesellschaft 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
DE4300829A1 (de) * 1993-01-14 1994-07-21 Siemens Ag Röntgendiagnostikeinrichtung
WO1995025990A2 (fr) * 1994-03-21 1995-09-28 Siemens Aktiengesellschaft Systeme de regulation a logique floue, notamment pour reguler la puissance de dosage d'un appareil radiographique de diagnostic
WO1996020579A1 (fr) * 1994-12-23 1996-07-04 Philips Electronics N.V. Appareil de radiographie comprenant un circuit de commande d'exposition
EP0748148A1 (fr) * 1995-06-06 1996-12-11 General Electric Company Détecteur de brillance numérique
EP0849980A1 (fr) * 1996-12-20 1998-06-24 General Electric Company Système d'imagerie à rayons X utilisant un détecteur d'image
WO2000035254A1 (fr) * 1998-12-08 2000-06-15 Koninklijke Philips Electronics N.V. Appareil d'examen radiologique a commande de brillance dependant de l'absorption d'un objet

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2548018Y2 (ja) * 1990-01-24 1997-09-17 興和 株式会社 Ｘ線撮像装置
AU646068B2 (en) * 1990-07-02 1994-02-03 Varian Medical Systems, Inc. Computed tomography apparatus using image intensifier detector
DE4102445C1 (fr) * 1991-01-28 1992-03-05 Siemens Ag, 8000 Muenchen, De
FI941589A (fi) * 1994-04-07 1996-01-12 Stig Svensson Laite röntgenkuvien ottamiseksi
US5617462A (en) * 1995-08-07 1997-04-01 Oec Medical Systems, Inc. Automatic X-ray exposure control system and method of use
DE19606873C2 (de) * 1996-02-23 2000-10-12 Siemens Ag Röntgendiagnostikeinrichtung mit einem Festkörperbildwandler
JP2000513869A (ja) * 1997-04-24 2000-10-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ｘ線像の着目部分に基づく露出制御
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
DE19934980B4 (de) 1999-07-26 2004-02-12 Siemens Ag Röntgendiagnostikeinrichtung mit einem flächenförmigen Röntgenbildwandler mit Rückseitenbeleuchtung
DE102004017180B4 (de) * 2004-04-07 2007-08-02 Siemens Ag Röntgendiagnostikeinrichtung zur digitalen Radiographie
US20060079753A1 (en) * 2004-09-27 2006-04-13 Michael Gurley Pre-acquisition identification of region for image acquisition time optimization for radiation imaging systems

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076985A (en) * 1973-08-18 1978-02-28 Emi Limited Computerized tomographic scanner with beam distribution control
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
EP0063644A1 (fr) * 1981-04-23 1982-11-03 VEB Transformatoren- und Röntgenwerk "Hermann Matern" Procédé de prises de vues radiographiques
DE3225061A1 (de) * 1982-07-05 1984-01-05 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikeinrichtung
DE3523514A1 (de) * 1984-07-03 1986-01-09 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Digitales roentgen-untersuchungsgeraet
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740998A1 (de) * 1977-09-12 1979-03-22 Siemens Ag Roentgendiagnostikeinrichtung fuer durchleuchtung
DE2803913C2 (de) * 1978-01-30 1986-01-30 Siemens AG, 1000 Berlin und 8000 München Röntgendiagnostikanlage mit einer Bildverstärker-Fernsehkette
JPS5773900U (fr) * 1980-10-24 1982-05-07
JPS5875800A (ja) * 1981-10-30 1983-05-07 Hitachi Medical Corp Ｘ線自動露出装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076985A (en) * 1973-08-18 1978-02-28 Emi Limited Computerized tomographic scanner with beam distribution control
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
EP0063644A1 (fr) * 1981-04-23 1982-11-03 VEB Transformatoren- und Röntgenwerk "Hermann Matern" Procédé de prises de vues radiographiques
DE3225061A1 (de) * 1982-07-05 1984-01-05 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikeinrichtung
DE3523514A1 (de) * 1984-07-03 1986-01-09 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Digitales roentgen-untersuchungsgeraet
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

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0429977A2 (fr) * 1989-11-24 1991-06-05 Shimadzu Corporation Appareil pour la production d'images de rayonnement
EP0429977A3 (en) * 1989-11-24 1991-12-04 Shimadzu Corporation Radiation imaging apparatus
US5151588A (en) * 1989-11-24 1992-09-29 Shimadzu Corporation Radiation imaging apparatus having detection elements of varying sizes
EP0435528A2 (fr) * 1989-12-26 1991-07-03 General Electric Company Système à rayons X
EP0435528A3 (en) * 1989-12-26 1991-11-27 General Electric Company X-ray system
EP0480096A1 (fr) * 1990-10-12 1992-04-15 Siemens Aktiengesellschaft 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
DE4300829A1 (de) * 1993-01-14 1994-07-21 Siemens Ag Röntgendiagnostikeinrichtung
WO1995025990A2 (fr) * 1994-03-21 1995-09-28 Siemens Aktiengesellschaft Systeme de regulation a logique floue, notamment pour reguler la puissance de dosage d'un appareil radiographique de diagnostic
WO1995025990A3 (fr) * 1994-03-21 1995-11-16 Siemens Ag Systeme de regulation a logique floue, notamment pour reguler la puissance de dosage d'un appareil radiographique de diagnostic
US5845269A (en) * 1994-03-21 1998-12-01 Siemens Aktiengesellschaft Fuzzy control system, particularly for dose rate control in an X-ray diagnostics apparatus
WO1996020579A1 (fr) * 1994-12-23 1996-07-04 Philips Electronics N.V. Appareil de radiographie comprenant un circuit de commande d'exposition
EP0748148A1 (fr) * 1995-06-06 1996-12-11 General Electric Company Détecteur de brillance numérique
EP0849980A1 (fr) * 1996-12-20 1998-06-24 General Electric Company Système d'imagerie à rayons X utilisant un détecteur d'image
WO2000035254A1 (fr) * 1998-12-08 2000-06-15 Koninklijke Philips Electronics N.V. Appareil d'examen radiologique a commande de brillance dependant de l'absorption d'un objet

Also Published As

Publication number Publication date
EP0362427B1 (fr) 1993-01-27
JPH087841Y2 (ja) 1996-03-06
JPH0260375U (fr) 1990-05-02
DE3877960D1 (de) 1993-03-11
US4982418A (en) 1991-01-01

Similar Documents

Publication Publication Date Title
EP0362427B1 (fr) Installation de radiodiagnostic comportant un détecteur de brillance moyenne d'image
DE69833128T2 (de) Bildung eines zusammengesetzten bildes aus aufeinanderfolgenden röntgenbildern
DE3201658C2 (de) Verfahren zum Erzeugen von Röntgenbilddaten und Röntgendiagnostikvorrichtung
DE2815218C2 (fr)
DE4402240B4 (de) System und Verfahren zur digitalen Röntgenbilderstellung
DE4133066C2 (de) Digitale Panoramaröntgenvorrichtung
DE1941433C3 (de) Vorrichtung zur Untersuchung eines lebenden Körpers durch Röntgen- oder γ-Strahlen
EP0024028B1 (fr) Appareil à rayons X pour la tomographie et la radiographie de la silhouette
EP0234603B1 (fr) Générateur de rayons X avec asservissement de la dose d'exposition
EP0312850B1 (fr) Installation de radiodiagnostic
DE3037621A1 (de) Durchleuchtungsanordnung zur aufnahme von schichtbildern eines dreidimensionalen objektes
DE10314536A1 (de) Verfahren zur Erzeugung einer Röntgenaufnahme
DE69631283T2 (de) Röntgenuntersuchungsvorrichtung mit dosierungskontrolle
DE102005022544A1 (de) Verfahren und Einrichtung zum Aufnehmen eines digitalen Röntgenbildes
EP1804082A1 (fr) Dispositif destiné à la lecture d'informations radiographiques stockées dans une couche fluorescente de mémoire et module de radiographie
DE10245715A1 (de) Verfahren und Vorrichtung zur Erzeugung von Teilabbildungen
EP0480096A1 (fr) 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
DE2702009A1 (de) Radiographisches geraet
EP0106402B1 (fr) Procédé pour produire des représentations tomographiques
DE69815252T2 (de) Belichtungssteuerung auf basis von einem bedeutenden teil eines röntgenstrahlbildes
DE4329691A1 (de) Strahlungsbild-Lesegerät
DE102006048233A1 (de) Röntgenanordnung mit einem Konverter zur Umwandlung von Systemparametern in Bildkettenparametern und zugehöriges Röntgenverfahren
DE19755764C2 (de) Verfahren zum Betrieb einer Röntgendiagnostikeinrichtung mit einer Röntgenbildwandler-Fernsehkette und Vorrichtung zur Durchführung eines solchen Verfahrens
DE1764414B2 (de) Roentgenschichtbildgeraet mit einem antriebsmittel zur erzeugung einer schichtbewegung und mit einer fernseheinrichtung
DE4137724A1 (de) Digitales radiographiesystem mit einer roentgenstrahl-bildverstaerkerroehre

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

17P Request for examination filed

Effective date: 19900509

17Q First examination report despatched

Effective date: 19920406

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930127

Ref country code: GB

Effective date: 19930127

REF Corresponds to:

Ref document number: 3877960

Country of ref document: DE

Date of ref document: 19930311

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19930127

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20071214

Year of fee payment: 20