DE4235011C1 - X=ray diagnostic unit with automatic relative adjustment between picture taking system and patient location device - enables catheter point or contrast medium bolus to be held automatically in picture centre - Google Patents

X=ray diagnostic unit with automatic relative adjustment between picture taking system and patient location device - enables catheter point or contrast medium bolus to be held automatically in picture centre

Info

Publication number
DE4235011C1
DE4235011C1 DE4235011A DE4235011A DE4235011C1 DE 4235011 C1 DE4235011 C1 DE 4235011C1 DE 4235011 A DE4235011 A DE 4235011A DE 4235011 A DE4235011 A DE 4235011A DE 4235011 C1 DE4235011 C1 DE 4235011C1
Authority
DE
Germany
Prior art keywords
picture
taking system
relative adjustment
image
location 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 - Fee Related
Application number
DE4235011A
Other languages
German (de)
Inventor
Joerg Dipl Ing Haendle
Heinz Dipl Ing Horbaschek
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 DE4235011A priority Critical patent/DE4235011C1/en
Application granted granted Critical
Publication of DE4235011C1 publication Critical patent/DE4235011C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/78Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves
    • G01S3/782Systems for determining direction or deviation from predetermined direction
    • G01S3/785Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system
    • G01S3/786Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system the desired condition being maintained automatically
    • G01S3/7864T.V. type tracking systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60Control of cameras or camera modules
    • H04N23/68Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/30Transforming light or analogous information into electric information
    • H04N5/32Transforming X-rays

Abstract

A computer circuit (7) determines the position of a predetermined picture point and influences a control device to adjust the picture taking system so that the picture point is always in a window within the picture. The picture taking system (1,4) is adjusted relatively to the patient location device (2) so that the predetermined picture point is always located in a window within the picture. A picture receiver (4) delivers corresp. electrical signals to the received X-ray picture. These signals are fed to the computer circuit (7) which produces characteristic information concerning the position of a predetermined picture point, and brings about a relative adjustment between the picture taking system (1,4) and the patient locating device (2). USE/ADVANTAGE - Easy and rapid application in medical practice, reducing manual manipulation.

Description

In der Medizin werden unter Röntgenkontrolle Führungs­ drähte in Blutgefäße eingeführt. Beim Einführen eines Führungsdrahtes soll die Führungsdrahtspitze wegen besse­ rer Erkennbarkeit immer etwa in der Bildmitte liegen und nicht aus dem Bild auswandern. Dies wird üblicherweise durch Nachfahren des Patiententisches oder des Bildauf­ nahmesystems erreicht. Dieses Nachfahren bedeutet jedoch für den Arzt eine lästige Manipulation, da er im sterilen Bereich arbeitet.In medicine they become leaders under X-ray control wires inserted into blood vessels. When introducing a Guide wire should improve the guide wire tip because of Recognizability is always in the middle of the picture and do not emigrate from the picture. This is usually by moving the patient table or the image on acquisition system reached. However, this descendant means annoying manipulation for the doctor, since he is in the sterile Area works.

Auch beim Durchlauf eines kurzen Kontrastmittelbolus durch längere Gefäßabschnitte muß das Bildaufnahmesystem oder der Patiententisch zur Verfolgung verschoben werden.Even when going through a short contrast medium bolus the image acquisition system or the patient table be moved for tracking.

Der Erfindung liegt die Aufgabe zugrunde, eine Röntgen­ diagnostikanlage zu schaffen, bei der ein bestimmtes Bild­ merkmal, z. B. die Spitze eines Führungsdrahtes (Katheters) oder der Kontrastmittelbolus, immer automatisch innerhalb eines vorbestimmten Bereiches im Bild gehalten wird.The invention has for its object an x-ray To create a diagnostic system with a specific image feature, e.g. B. the tip of a guide wire (catheter) or the contrast agent bolus, always automatically within of a predetermined area is held in the image.

Diese Aufgabe ist erfindungsgemäß gelöst durch eine Rönt­ gendiagnostikanlage mit einem Bildempfänger, der dem empfangenen Röntgenbild entsprechende elektrische Signale liefert, die einer Rechenschaltung zugeführt werden, wel­ che daraus die Lage eines vorbestimmten Bildmerkmales kennzeichnende Informationen erzeugt und einer Steuervor­ richtung zuführt, die eine Relativverstellung zwischen Bildaufnahmesystem und Patientenlagerungsvorrichtung in der Weise bewirkt, daß sich das vorbestimmte Bildmerkmal immer in einem Fenster innerhalb des Bildes befindet. Bei der erfindungsgemäßen Röntgendiagnostikanlage kann in der Rechenschaltung durch einen Bildverarbeitungsalgorithmus ein vorbestimmtes Bildmerkmal, z. B. ein Führungsdraht oder ein Kontrastmittelbolus, durch richtungsabhängige Filte­ rung und Verfolgung ohne Subtraktion aufeinanderfolgender Bilder markiert und hervorgehoben werden. Die Rechenschal­ tung kann dabei der Steuervorrichtung Informationen über die Lage des Bildmerkmales im Bild zuführen und die Steuervorrichtung kann sicherstellen, daß das Bildmerkmal immer in einem Fenster innerhalb des Bildes liegt, sich also immer in der Bildmitte befindet. Hierzu bewirkt die Steuervorrichtung eine geeignete Relativverstellung zwi­ schen Bildaufnahmesystem und Patientenlagerungsvorrich­ tung. Diese Relativverstellung ist dabei nicht nur ein­ dimensional sondern auch zweidimensional realisierbar. Hierzu kann die richtungsabhängige Filterung der Ver­ folgungsalgorithmen genutzt werden.This object is achieved by an X-ray Genetic diagnostic system with an image receiver that the received X-ray image corresponding electrical signals supplies, which are fed to a computing circuit, wel che the position of a predetermined image feature characteristic information generated and a tax direction that provides a relative adjustment between Imaging system and patient positioning device in  the way causes the predetermined image feature always located in a window within the image. At the X-ray diagnostic system according to the invention can in the Arithmetic circuit using an image processing algorithm a predetermined image feature, e.g. B. a guide wire or a contrast medium bolus due to direction-dependent filters tracking and tracing without subtracting consecutively Images are marked and highlighted. The computing scarf device can provide the control device with information about the position of the image feature in the image and the Control device can ensure that the image feature always lies in a window within the picture itself always in the middle of the picture. To do this, the Control device a suitable relative adjustment between imaging system and patient positioning device tung. This relative adjustment is not just one dimensional but also two-dimensional. The directional filtering of the ver following algorithms are used.

Die Erfindung ist nachfolgend anhand eines in der Zeich­ nung dargestellten Ausführungsbeispieles näher erläutert.The invention is based on a in the drawing tion illustrated embodiment explained in more detail.

In der Zeichnung ist ein Röntgenstrahler 1 dargestellt, der einen auf einem Tisch 2 liegenden Patienten 3 durch­ strahlt. Mit Hilfe eines Bildempfängers 4 wird ein Rönt­ genbild des durchstrahlten Bereiches erzeugt. Der Bild­ empfänger 4 liefert entsprechende Signale auf der Leitung 5, die in einem A/D-Wandler 6 digitalisiert werden. Eine Rechenschaltung 7 bestimmt die Lage eines vorbestimmten Bildmerkmales, z. B. eines Führungsdrahtes oder eines Kontrastmittelbolus im Bild und führt entsprechende In­ formationen über eine Überlagerungsschaltung 8 einer Steuervorrichtung 9 zu. Die Steuervorrichtung 9 steuert eine Servosteuerung 10 zur Relativverstellung des Bild­ aufnahmesystems 1, 4 gegenüber dem Tisch 2 in x- und y-Richtung. y steht dabei senkrecht zur Zeichenebene. Über einen Monitor 11 kann das erzeugte Röntgenbild wiederge­ geben werden und mit Hilfe einer Laser-Multiformatkamera 12 ausgedruckt werden. Der Servosteuerung 10 werden außer den Sollwertsignalen x und y noch die Signale x* und y* zugeführt, die die Istwerte der Lage des vorbestimmten Bildmerkmales im Bild wiedergeben. Die Verstellung erfolgt in der Weise, daß die Istwerte den Sollwerten angeglichen werden.In the drawing, an X-ray emitter 1 is shown, which radiates through a patient 3 lying on a table 2 . With the aid of an image receiver 4 , an X-ray image of the irradiated area is generated. The image receiver 4 delivers corresponding signals on the line 5 , which are digitized in an A / D converter 6 . A computing circuit 7 determines the position of a predetermined image feature, e.g. B. a guide wire or a contrast agent bolus in the picture and leads to corresponding information in a superposition circuit 8 of a control device 9 . The control device 9 controls a servo control 10 for the relative adjustment of the image recording system 1 , 4 relative to the table 2 in the x and y directions. y is perpendicular to the plane of the drawing. The generated X-ray image can be reproduced via a monitor 11 and printed out using a laser multi-format camera 12 . In addition to the setpoint signals x and y, the servo control 10 is also supplied with the signals x * and y *, which represent the actual values of the position of the predetermined image feature in the image. The adjustment is made in such a way that the actual values are adjusted to the setpoints.

Die Rechenschaltung 7 verarbeitet die Signale des A/D- Wandlers 6 mit Hilfe eines Linienverfolgungsalgorithmus mit richtungsabhängiger Filterung und Richtungs-Vektoren­ bildung. In der Überlagerungsschaltung 8 erfolgt eine passungsrichtige Bildüberlagerung und eine selektive Her­ vorhebung des vorbestimmten Bildmerkmales. Die Steuer­ vorrichtung 9 gewinnt ein Differenzsignal bei einer Ab­ weichung der Istwerte x*, y* von den Sollwerten x, y, z. B. bei Auswanderung der Spitze eines Führungsdrahtes aus der Bildmitte. Durch ein Fenster in der Bildmitte, d. h. durch einen zentralen Bildbereich beliebiger Form oder Größe, wird beim Überschreiten oder Annähern der Spitze des Führungsdrahtes oder auch eines Katheters, oder des Kon­ trastmittelbolus an die Fenstergrenzen ein x-, y-Koordi­ natensignal erzeugt und das Bildaufnahmesystem 1, 4 durch die Servosteuerung 10 nach dem Istwert-Sollwert-Vergleich in der Steuervorrichtung 9 relativ zum Tisch 2 in x- und y-Richtung automatisch verschoben, falls dies erforderlich ist.The arithmetic circuit 7 processes the signals of the A / D converter 6 using a line tracking algorithm with direction-dependent filtering and direction vectors. In the superimposition circuit 8 there is a correct image overlay and a selective highlighting of the predetermined image feature. The control device 9 wins a difference signal in the event of a deviation from the actual values x *, y * from the target values x, y, z. B. when the tip of a guide wire emigrates from the center of the picture. Through a window in the center of the image, i.e. through a central image area of any shape or size, an x, y coordinate signal is generated when the tip of the guide wire or a catheter or the contrast medium bolus is passed or approached, and the image recording system 1 , 4 automatically shifted by the servo control 10 after the actual value-target value comparison in the control device 9 in relation to the table 2 in the x and y directions, if this is necessary.

Claims (1)

Röntgendiagnostikanlage mit einem Bildempfänger (4), der dem empfangenen Röntgenbild entsprechende elektrische Signale liefert, die einer Rechenschaltung (7) zugeführt werden, welche daraus die Lage eines vorbestimmten Bild­ merkmales kennzeichnende Informationen erzeugt und einer Steuervorrichtung (9) zuführt, die eine Relativverstellung zwischen Bildaufnahmesystem (1, 4) und Patientenlagerungs­ vorrichtung (2) in der Weise bewirkt, daß sich das vorbe­ stimmte Bildmerkmal immer in einem Fenster innerhalb des Bildes befindet.X-ray diagnostic system with an image receiver ( 4 ), which supplies the received X-ray image with corresponding electrical signals, which are fed to a computing circuit ( 7 ), which uses this to generate information identifying the position of a predetermined image feature and supplies it to a control device ( 9 ), which provides a relative adjustment between the image recording system ( 1 , 4 ) and patient positioning device ( 2 ) in such a way that the predetermined image feature is always in a window within the image.
DE4235011A 1992-10-16 1992-10-16 X=ray diagnostic unit with automatic relative adjustment between picture taking system and patient location device - enables catheter point or contrast medium bolus to be held automatically in picture centre Expired - Fee Related DE4235011C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4235011A DE4235011C1 (en) 1992-10-16 1992-10-16 X=ray diagnostic unit with automatic relative adjustment between picture taking system and patient location device - enables catheter point or contrast medium bolus to be held automatically in picture centre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4235011A DE4235011C1 (en) 1992-10-16 1992-10-16 X=ray diagnostic unit with automatic relative adjustment between picture taking system and patient location device - enables catheter point or contrast medium bolus to be held automatically in picture centre

Publications (1)

Publication Number Publication Date
DE4235011C1 true DE4235011C1 (en) 1993-11-18

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DE4235011A Expired - Fee Related DE4235011C1 (en) 1992-10-16 1992-10-16 X=ray diagnostic unit with automatic relative adjustment between picture taking system and patient location device - enables catheter point or contrast medium bolus to be held automatically in picture centre

Country Status (1)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919473C1 (en) * 1989-06-14 1990-12-20 Heinrich Dr. 8400 Regensburg De Hubauer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919473C1 (en) * 1989-06-14 1990-12-20 Heinrich Dr. 8400 Regensburg De Hubauer

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