EP0362427B1 - 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 PDFInfo
- Publication number
- EP0362427B1 EP0362427B1 EP88116488A EP88116488A EP0362427B1 EP 0362427 B1 EP0362427 B1 EP 0362427B1 EP 88116488 A EP88116488 A EP 88116488A EP 88116488 A EP88116488 A EP 88116488A EP 0362427 B1 EP0362427 B1 EP 0362427B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detector
- ray diagnostic
- detector elements
- image brightness
- control device
- 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
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 range, the detector being formed from a matrix of detector elements and a control device being present which selects predetermined elements for signal generation for the image brightness control.
- 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.
- An X-ray diagnostic system according to the preamble of claim 1 is known from EP-A-0 217 456.
- 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 with a large number of data records for the selection of the detector elements corresponding to the body parts shown in each case and that a selection device for selecting the respective data set after recognizing the respective body part shown is connected to the control device by comparison with absorption profiles of body parts occurring in the selection device.
- a typical two-dimensional coarse absorption profile of the fluoroscopic image can be 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 a surface on which the entire output image of the X-ray image intensifier 4 can be reproduced, 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)
Claims (2)
- Installation de radiodiagnostic comportant un détecteur (8) servant à détecter la brillance moyenne de l'image dans une zone prédéterminée, dans laquelle le détecteur est constitué par une matrice d'éléments détecteurs (16) et il est prévu un dispositif de commande (15) qui sélectionne des éléments détecteurs prédéterminés (16) pour produire des signaux pour la régulation de la brillance de l'image, caractérisée par le fait que le dispositif de commande (15) comporte une mémoire (17) possédant une multiplicité d'ensembles de données pour la sélection des éléments détecteurs (16), en fonction des parties du corps, et qu'un dispositif de sélection (18) servant à sélectionner l'ensemble respectif de données est raccordé au dispositif de commande (15), après identification de la partie du corps respective représentée par comparaison à des profils d'absorption, mémorisés dans le dispositif de sélection, de la partie du corps précédente.
- Installation de radiodiagnostic suivant la revendication 1, caractérisée par le fait que le signal vidéo d'une chaîne de télévision à amplificateur de brillance (4,5,6,7) est envoyé au dispositif de sélection (18).
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 EP0362427A1 (fr) | 1990-04-11 |
EP0362427B1 true 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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004017180B4 (de) * | 2004-04-07 | 2007-08-02 | Siemens Ag | Röntgendiagnostikeinrichtung zur digitalen Radiographie |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2890553B2 (ja) * | 1989-11-24 | 1999-05-17 | 株式会社島津製作所 | X線像撮像装置 |
US5012504A (en) * | 1989-12-26 | 1991-04-30 | General Electric Company | Automatic brightness compensation for fluorography systems |
JP2548018Y2 (ja) * | 1990-01-24 | 1997-09-17 | 興和 株式会社 | X線撮像装置 |
DE69129008T2 (de) * | 1990-07-02 | 1998-08-20 | Varian Associates | Röntgenstrahlentherapiesimulator |
EP0480096B1 (fr) * | 1990-10-12 | 1994-07-13 | 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 |
DE4102445C1 (fr) * | 1991-01-28 | 1992-03-05 | Siemens Ag, 8000 Muenchen, De | |
DE4300829C2 (de) * | 1993-01-14 | 1996-08-29 | Siemens Ag | Röntgendiagnostikeinrichtung |
DE9404768U1 (de) * | 1994-03-21 | 1995-07-20 | Siemens Ag | Röntgendiagnostikgerät mit einer Dosisleistungsregelung |
FI941589A (fi) * | 1994-04-07 | 1996-01-12 | Stig Svensson | Laite röntgenkuvien ottamiseksi |
WO1996020579A1 (fr) * | 1994-12-23 | 1996-07-04 | Philips Electronics N.V. | Appareil de radiographie comprenant un circuit de commande d'exposition |
US5574764A (en) * | 1995-06-06 | 1996-11-12 | General Electric Company | Digital brightness detector |
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 |
US5751783A (en) * | 1996-12-20 | 1998-05-12 | General Electric Company | Detector for automatic exposure control on an x-ray imaging system |
DE69815252T2 (de) * | 1997-04-24 | 2004-04-29 | Koninklijke Philips Electronics N.V. | Belichtungssteuerung auf basis von einem bedeutenden teil eines röntgenstrahlbildes |
DE69939621D1 (de) * | 1998-12-08 | 2008-11-06 | Koninkl Philips Electronics Nv | Röntgenstrahlung-prüfungsvorrichtung enthaltend eine object-absorptionseigenschaften abhängige helligkeitssteuerung |
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 |
US20060079753A1 (en) * | 2004-09-27 | 2006-04-13 | Michael Gurley | Pre-acquisition identification of region for image acquisition time optimization for radiation imaging systems |
Family Cites Families (10)
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 |
JPS536593A (en) * | 1976-07-08 | 1978-01-21 | Toshiba Corp | X-ray apparatus for diagnosis |
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 | ||
DD158307A1 (de) * | 1981-04-23 | 1983-01-05 | Guenther Orth | Verfahren zur herstellung von roentgenaufnahmen |
JPS5875800A (ja) * | 1981-10-30 | 1983-05-07 | Hitachi Medical Corp | X線自動露出装置 |
DE3225061A1 (de) * | 1982-07-05 | 1984-01-05 | Siemens AG, 1000 Berlin und 8000 München | Roentgendiagnostikeinrichtung |
JPS6116371A (ja) * | 1984-07-03 | 1986-01-24 | Toshiba Corp | デジタルフルオログラフイ装置 |
NL8502569A (nl) * | 1985-09-20 | 1987-04-16 | Philips Nv | Roentgenonderzoekapparaat met een locaal opgedeelde hulpdetector. |
-
1988
- 1988-10-05 EP EP88116488A patent/EP0362427B1/fr not_active Expired - Lifetime
- 1988-10-05 DE DE8888116488T patent/DE3877960D1/de not_active Expired - Lifetime
-
1989
- 1989-09-21 US US07/410,346 patent/US4982418A/en not_active Expired - Lifetime
- 1989-10-03 JP JP1989116558U patent/JPH087841Y2/ja not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004017180B4 (de) * | 2004-04-07 | 2007-08-02 | Siemens Ag | Röntgendiagnostikeinrichtung zur digitalen Radiographie |
US7463718B2 (en) | 2004-04-07 | 2008-12-09 | Siemens Aktiengesellschaft | X-ray diagnostic device for digital radiography |
Also Published As
Publication number | Publication date |
---|---|
DE3877960D1 (de) | 1993-03-11 |
JPH087841Y2 (ja) | 1996-03-06 |
JPH0260375U (fr) | 1990-05-02 |
EP0362427A1 (fr) | 1990-04-11 |
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 | |
DE2815218C2 (fr) | ||
EP0024028B1 (fr) | Appareil à rayons X pour la tomographie et la radiographie de la silhouette | |
DE4133066C2 (de) | Digitale Panoramaröntgenvorrichtung | |
DE60024907T2 (de) | Verfahren und Vorrichtung zur Kompensation von Artefakten mittels veränderlicher Winkelabtastung | |
DE3201658C2 (de) | Verfahren zum Erzeugen von Röntgenbilddaten und Röntgendiagnostikvorrichtung | |
EP1082851B1 (fr) | Procede et dispositif de production d'image en radioscopie dentaire numerique | |
DE4402240B4 (de) | System und Verfahren zur digitalen Röntgenbilderstellung | |
DE1941433B2 (de) | Vorrichtung zur Untersuchung eines lebenden Körpers durch Röntgen- oder gamma-Strahlen | |
DE102005043051B4 (de) | Verfahren und Einrichtung zum Erzeugen eines Röntgenbildes | |
EP0312850B1 (fr) | Installation de radiodiagnostic | |
DE3037621A1 (de) | Durchleuchtungsanordnung zur aufnahme von schichtbildern eines dreidimensionalen objektes | |
DE19502574A1 (de) | Röntgen-Computertomograph | |
DE10314536A1 (de) | Verfahren zur Erzeugung einer Röntgenaufnahme | |
EP1804082B1 (fr) | Dispositif destiné à la lecture d'informations radiographiques stockées dans une couche fluorescente de mémoire et module de radiographie | |
EP0774921B1 (fr) | Dispositif de radiodiagnostic servant a realiser des tomographies panoramiques | |
DE69631283T2 (de) | Röntgenuntersuchungsvorrichtung mit dosierungskontrolle | |
DE19651722A1 (de) | Belichtungsautomatik für einen Röntgenapparat | |
DE2702009A1 (de) | Radiographisches geraet | |
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 | |
EP0106402B1 (fr) | Procédé pour produire des représentations tomographiques | |
EP1202561B1 (fr) | Dispositif et méthode de lecture de différents groupes de pixels avec différents taux d'échantillonage | |
DE69738105T2 (de) | Röntgenstrahl-Untersuchungsvorrichtung mit Röntgenstrahl-Bildsensormatrix und Korrektureinheit | |
DE10320862A1 (de) | Verfahren zur automatischen Einstellung einer Blende |
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 |