DE939348C - Mounting device especially for X-ray tubes - Google Patents

Mounting device especially for X-ray tubes

Info

Publication number
DE939348C
DE939348C DEM11536A DEM0011536A DE939348C DE 939348 C DE939348 C DE 939348C DE M11536 A DEM11536 A DE M11536A DE M0011536 A DEM0011536 A DE M0011536A DE 939348 C DE939348 C DE 939348C
Authority
DE
Germany
Prior art keywords
ray tube
mounting device
counterweight
arrangement
ray tubes
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
Application number
DEM11536A
Other languages
German (de)
Inventor
Herbert Armoneit
Hansheinrich Dr-Ing Verse
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.)
CHF Mueller AG
Original Assignee
CHF Mueller 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 CHF Mueller AG filed Critical CHF Mueller AG
Priority to DEM11536A priority Critical patent/DE939348C/en
Application granted granted Critical
Publication of DE939348C publication Critical patent/DE939348C/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/50Clinical applications
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/44Constructional features of apparatus for radiation diagnosis
    • A61B6/4429Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
    • A61B6/447Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit or the detector unit being mounted to counterpoise or springs
    • A61B6/51
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/001Arrangements compensating weight or flexion on parts of the machine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/04Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/08Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a vertical axis, e.g. panoramic heads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/04Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20Undercarriages with or without wheels
    • F16M11/2007Undercarriages with or without wheels comprising means allowing pivoting adjustment
    • F16M11/2035Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction
    • F16M11/2064Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction for tilting and panning
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20Undercarriages with or without wheels
    • F16M11/2092Undercarriages with or without wheels comprising means allowing depth adjustment, i.e. forward-backward translation of the head relatively to the undercarriage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20Undercarriages with or without wheels
    • F16M11/24Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00Details of stands or supports
    • F16M2200/04Balancing means
    • F16M2200/044Balancing means for balancing rotational movement of the undercarriage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00Details of stands or supports
    • F16M2200/06Arms
    • F16M2200/063Parallelogram arms

Description

Halterungsvorrichtung insbesondere für Röntgenröhren Die Erfindung bezieht sich auf eine Halterungsvorrichtung für Gegenstände, die leicht von Hand vorzugsweise längs vorgegebener Flächen einstellbar sein sollen.Mounting device, in particular for X-ray tubes The invention refers to a holding device for items that can be easily handled by hand should preferably be adjustable along predetermined areas.

In der medizinischen Röntgentechnik liegt häufig die Aufgabe vor, die an einem Stativ befestigte Röntgenröhre in einer Fläche, die annähernd eine Ebene sein kann, zu bewegen. Eine besondere Bedeutung kommt der leichten Beweglichkeit und Einstellbarkeit in eine gewünschte Lage zu bei Körperhöhlenrohren, also bei Therapie-Röntgenröhren, deren Anode in Körperhöhlen, z. B. den Darm, eingeführt werden kann. Im Interesse der Bequemlichkeit des Bedienenden liegt die Ebene, längs welcher die Röntgenröhre bewegt wird, möglichst weit entfernt von der Stativsäule, und diese liegt nicht in jener Bewegungsebene. In medical X-ray technology, the task is often the X-ray tube attached to a tripod in an area that is approximately one Level can be moving. Easy mobility is of particular importance and adjustability to a desired position for body cavity tubes, i.e. for Therapy X-ray tubes, the anode of which is in body cavities, e.g. B. the intestine, introduced can be. In the interests of operator convenience, the plane is longitudinal which the X-ray tube is moved, as far away as possible from the stand column, and this is not in that plane of movement.

In Fig. 1 ist zum besseren Verständnis eine Halterungsvorrichtung für Körperhöhlenrohre dargestellt, wie sie heute üblich ist. Mit ihr kann die als Stabanodenröhre ausgebildete Röntgenröhre I in der Ebene 2, z. B. entlang der Bahn 3, so bewegt werden, daß der Anodenstab ständig tangential zu dieser Kurve 3 verläuft. Um diese Bewegung zu ermöglichen, ist die Röhre I über ein Drehgelenk 4, einen Querarm 5 und einen Kreuzkopf 6 an der Stativsäule 7 bewegbalr gelagert, und die Anordnung kann in bekannter Weise durch ein innerhalb der Säule 7 laufendes Gegengewicht ausgeglichen sein. Entsprechend den Pfeilen 8 und 11 können in bekannter Weise das Kreuzstück6 um das Stativ 7 und ebenso der Querarm 5 im Kreuzstück gedreht werden. Um die Röhre nun auf der Bahn 3 zu bewegen, müssen gleichzeitig Bewegungen in den eingezeichneten Pfeilrichtungen 8, 9, I0, II und I2 erfolgen. Da jede dieser Bewegungen mit Reibungen behaftet ist, ist es sehr schwierig, eine zügige Bewegung der Röhre 1 entlang der Bahn 3 zu erreichen. Ein weiterer Grund hierfür liegt ferner darin, daß sich die Bewegung der Röhre I entlang der Bahn 3 auf Grund der Konstruktion aus sehr vielen Komponenten zusammensetzt und daß diese Komponenten all verschiedene Konstruktionselemente angreifen. In Fig. 1 is a mounting device for better understanding shown for body cavity tubes, as is common today. With it, the as Rod anode tube formed X-ray tube I in level 2, z. B. along the track 3, are moved so that the anode rod is constantly tangential to this curve 3. To enable this movement, the tube I is via a swivel joint 4, a transverse arm 5 and a cross head 6 movably mounted on the stand column 7, and the arrangement can be compensated in a known manner by a counterweight running within the column 7 be. Corresponding to arrows 8 and 11 can in a known manner the cross piece 6 can be rotated around the stand 7 and also the cross arm 5 in the cross piece. In order to move the tube on track 3, movements must be carried out simultaneously in the indicated arrow directions 8, 9, I0, II and I2. Because each of these movements frictional, it is very difficult to move the tube swiftly 1 along runway 3. Another reason for this is that that the movement of the tube I along the path 3 due to the construction composed of a great many components and that these components are all different Attack construction elements.

Die leichte Einstellbarkeit, z. B. einer Röntgenröhre, kann bei der geschilderten Bewegungsaufgabe durch die Erfindung in konstruktiv einfacher Weise verbessert werden. Dabei sind sowohl die Bewegungsfl»åche der Röntgenröhre als auch ein verschiedenes Verhältnis von Eigengewicht zu Gegengewicht frei wählbar. The easy adjustability, e.g. B. an X-ray tube, can in the described movement task by the invention in a structurally simple manner be improved. Both the movement area of the X-ray tube and a different ratio of dead weight to counterweight can be freely selected.

Gemäß der Erfindung ist zu diesem Zweck bei einer Halterungsvorrichtung insbesondere für Röntgenröhren, die längs einer vorgegebenen Ebene leicht von Hand bewegbar sind, wobei die Röntgenröhre und gegebenenfalls ihr Zubehör, wie z. B. das Hochspannungskabel, durch ein Gegengewicht für sich ausbalanciert sind und die ganze Anordnung in die Bewegungsfläche der Röntgenröhre verlegt und am gemeinsamen Schwerpunkt mit der tragenden Stativsäule verbunden ist, die Röntgenröhre über eine im Systemschwerpunkt vorzugsweise drehbar gelagerte Lenkeranordnung mit zweckmäßig verstellbarem Gegengewicht verbunden. According to the invention is for this purpose in a mounting device especially for X-ray tubes that can easily be manually moved along a given plane are movable, the X-ray tube and possibly its accessories, such as. B. the high-voltage cable, balanced by a counterweight and the whole arrangement in the movement area of the X-ray tube and on the common The center of gravity is connected to the supporting stand column, the X-ray tube via a in the system focus preferably rotatably mounted handlebar arrangement with expedient adjustable counterweight connected.

In der Zeichnung sind in den Fig. 2 und 3 Ausführungsbeispiele für Vorrichtungen nach der Erfindung dargestellt. In the drawing are in Figs. 2 and 3 embodiments for Devices according to the invention shown.

Bei der Beschreibung der Ausführungsbeispiele werden der Einfachheit halber nur die Gewichte der Röhre und ihres Gegengewichtes betrachtet, und die Eigengewichte der notwendigen Verbindungsglieder sind vernachlässigt. Es ist klar, daß bei der praktischen Ausführung die Eigengewichte leicht zu berücksichtigen sind. The description of the exemplary embodiments is made for the sake of simplicity only consider the weights of the tube and its counterweight, and the dead weights the necessary connecting links are neglected. It is clear that the practical execution the dead weights are easy to take into account.

In Fig. 2 ist die Verbindungsgerade zwischen den Schwerpunkten von Röhre I und Gegengewicht 13 die Linie 2I-2I. Der Systemschwerpunkt sei der Punkt 23. In diesem Punkt ist die gesamte Anordnung an eine bekannte Stativanordnung 24 angeschlossen, und zwar derart, daß sie auch noch in Pfeilrichtung 25 bewegbar ist. Die Einstellebene 2 (Fig. 1) ist dann noch innerhalb des Bewegungsbereiches 25 frei wählbar, dabei ist jedoch diese Ebene immer parallel zur Mittellinie der Stativsäule 26. In Fig. 2 is the straight line connecting the centers of gravity of Tube I and counterweight 13 the line 2I-2I. The system focus is the point 23. At this point the entire arrangement is reminiscent of a known tripod arrangement 24 connected in such a way that it can also be moved in the direction of arrow 25. The setting level 2 (FIG. 1) is then still free within the range of motion 25 can be selected, but this plane is always parallel to the center line of the stand column 26th

Das Gelenk an der Stelle 23 kann auch so ausgebildet werden, daß diese letztere Einschränkung noch wegfällt. The joint at the point 23 can also be designed so that this latter restriction does not apply.

Bei der Anordnung nach Fig. 3 ist es möglich, ein verschiedenes Verhältnis von Eigengewicht der Röhre I zu Gegengewicht I3 zu wählen. Es ändern sich dann nur die EebeLarmverhältnis!se, d. th., bei einer solchen Anordnung braucht nicht mit dem Gewichtsverhältnis 1 : 1 gearbeitet zu werden. Die Anordnung ist um die Achse um volle 3600 drehbar und ständig im Gleichgewicht. Ist das Gewichtsverhältnis I-: I, dann verhalten sich die Hebelarme 27 und 28 wie 1 : I. Wählt man 27 abweichend von 2s, dann verhalten sich die Gewichte umgekehrt wie die zugehörigen Hebelarme. In the arrangement of FIG. 3 it is possible to have a different ratio to choose from the dead weight of the tube I to the counterweight I3. It just changes the living conditions, d. th., with such an arrangement does not need with the weight ratio 1: 1 to be worked. The arrangement is around the axis Can be rotated a full 3600 and is always in balance. Is the weight ratio I-: I, then the lever arms 27 and 28 behave like 1: I. If 27 is selected differently of 2s, then the weights behave in reverse as the corresponding lever arms.

Fig. 3 zeigt die Lenkeranordnung der Fig. 2 im Prinzip. Fig. 3 shows the handlebar arrangement of Fig. 2 in principle.

Bei den bisherigen Betrachtungen wurde die Wirkung des zur Röntgenröhre führenden Hochspannungskabels vernachlässigt. Bei dem gegebenen Verhältnis zwischen Kabelgewicht und Röhrengewicht wird an den gegebenen oben beschriebenen Prinzipien der Halterungsvorrichtung nichts geändert, es tritt nur eine Unsymmetriekomponente hinzu, die zum Teil durch die Wahl des Lagerungspunktes 23 ausgeglichen werden kann, zum Teil wirken auch die Reibungen in der gesamten Anordnung kompens,ierend, und notfalls. kann man auch diese Reibung an gewissen Stellen auf eine - gewünschte Höhe bringen. In the previous considerations, the effect of the became an X-ray tube leading high voltage cable neglected. Given the relationship between Cable weight and tube weight is given according to the principles described above the mounting device has not changed anything, only an asymmetry component occurs added, which can be partially offset by the choice of storage point 23, In some cases, the frictions also have a compensating, and compensating effect in the entire arrangement if necessary. you can also adjust this friction at certain points to a - desired Bring height.

Claims (1)

PATENTANSPRUCH: Halterungsvo,rrichtung insbesondere jür Röntgenröhren, die längs einer vorgegebenen Ebene leicht von Hand bewegbar sind, wobei die Röntgenröhre und gegebenenfalls ihr Zubehör, wie z. B. das Hochspannungs'kabel, durch ein Gegengewicht für sich ausbalanciert sind und die ganze Anordnung in die Bewegungsfläche der Röntgenröhre verlegt und am gemeinsamen Schwerpunkt mit der tragenden Stativsäule verbunden ist, dadurch gekennzeichnet, daß die Röntgenröhre (i) über eine im Systemschwerpunkt (23) vorzugsweise drehbar gelagerte Lenkeranordnung mit zweckmäßig verstellbarem Gegengewicht (I3) verbunden ist. PATENT CLAIM: Mounting device, especially for X-ray tubes, which are easily movable by hand along a predetermined plane, the X-ray tube and possibly their accessories, such as B. the Hochspannungs'kabel, by a counterweight are balanced for themselves and the whole arrangement in the movement area of the X-ray tube laid and connected to the supporting stand column at the common center of gravity, characterized in that the X-ray tube (i) has one in the system focus (23) preferably rotatably mounted handlebar arrangement with an appropriately adjustable Counterweight (I3) is connected. Angezogene Druckschriften: Osterreichische Patentschrift Nr. I36 775; deutsche Patentschrift Nr. 666 775. Cited publications: Austrian patent specification No. I36 775; German patent specification No. 666 775.
DEM11536A 1951-11-03 1951-11-03 Mounting device especially for X-ray tubes Expired DE939348C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM11536A DE939348C (en) 1951-11-03 1951-11-03 Mounting device especially for X-ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM11536A DE939348C (en) 1951-11-03 1951-11-03 Mounting device especially for X-ray tubes

Publications (1)

Publication Number Publication Date
DE939348C true DE939348C (en) 1956-02-23

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DEM11536A Expired DE939348C (en) 1951-11-03 1951-11-03 Mounting device especially for X-ray tubes

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320723A1 (en) * 1975-08-13 1977-03-11 Philips Nv RADIOLOGICAL DEVICE EQUIPPED WITH A SOURCE OF BALANCED X-RAYS THAT CAN BE MOVED IN A PLAN
DE3007105A1 (en) * 1979-02-28 1980-09-11 Philips Nv CARRYING DEVICE WITH WEIGHT COMPENSATION
EP0251487A2 (en) * 1986-06-24 1988-01-07 Picker International, Inc. X-ray systems
EP0399324A2 (en) * 1989-05-23 1990-11-28 Picker International Gmbh Apparatus for angiography
EP0415176A1 (en) * 1989-08-25 1991-03-06 Siemens-Elema AB Balancing device
NL9401448A (en) * 1994-09-06 1996-04-01 Egripment B V Camera dolly with improved balance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT136775B (en) * 1930-08-08 1934-03-10 Siemens Reiniger Veifa High-voltage protected X-ray machine.
DE666775C (en) * 1932-11-08 1938-10-28 Ernst Pohl X-ray tripod with swiveling boom

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT136775B (en) * 1930-08-08 1934-03-10 Siemens Reiniger Veifa High-voltage protected X-ray machine.
DE666775C (en) * 1932-11-08 1938-10-28 Ernst Pohl X-ray tripod with swiveling boom

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320723A1 (en) * 1975-08-13 1977-03-11 Philips Nv RADIOLOGICAL DEVICE EQUIPPED WITH A SOURCE OF BALANCED X-RAYS THAT CAN BE MOVED IN A PLAN
DE3007105A1 (en) * 1979-02-28 1980-09-11 Philips Nv CARRYING DEVICE WITH WEIGHT COMPENSATION
EP0251487A2 (en) * 1986-06-24 1988-01-07 Picker International, Inc. X-ray systems
EP0251487A3 (en) * 1986-06-24 1988-11-23 Picker International, Inc. X-ray systems
EP0399324A2 (en) * 1989-05-23 1990-11-28 Picker International Gmbh Apparatus for angiography
EP0399324A3 (en) * 1989-05-23 1991-03-13 Picker International Gmbh Apparatus for angiography
EP0415176A1 (en) * 1989-08-25 1991-03-06 Siemens-Elema AB Balancing device
US5143333A (en) * 1989-08-25 1992-09-01 Siemens Aktiengesellschaft Weight counterbalance means
NL9401448A (en) * 1994-09-06 1996-04-01 Egripment B V Camera dolly with improved balance

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