DE19841844C2 - Mobile X-ray diagnostic device with a bearing for a C-arm - Google Patents

Description

The invention relates to a mobile surgical x-ray diagnostic device with a multiple adjustable and at least rotatable about a horizontal axis of rotation bracket for a C- Arch on which a circularly curved C-arm can be moved along its circumference is mounted, the C-arm at its ends an X-ray source and one X-ray beam receiver carries and the C-arm is adjustable so that the central beam of the X-ray beam can be aligned parallel to the floor, optionally the X-ray source or the X-ray receiver in the area of the holder can be arranged.

X-ray diagnostic equipment in which the central beam is parallel to the floor are known from the patent literature and on the market.

The US patent US 5,764,719 describes a stationary X-ray diagnostic device in which the X-ray source within the C-arm profile and the X-ray receiver is arranged at the opposite end of the C-arm and by "rolling over" the X-ray source in the area of the holder a horizontal orientation of the Central beam is made possible.

German Offenlegungsschrift DE 196 39 979 A1 describes a bearing for a C- Arc that contains two axes of rotation, one axis of rotation through the center of mass of the C-arm runs with X-ray source, X-ray receiver and holder.

The European patent application EP 717 954 A2 describes one X-ray diagnostic device with a C-arm and a holder that extends around a horizontal The axis of rotation is rotatable, the holder being symmetrical to the horizontal axis of rotation is arranged and the attachment point of the bracket on the C-arm essentially on the horizontal axis of rotation. By a suitable arrangement of X-ray tubes and X-ray receiver is the common center of mass of the C-arm, bracket, X-ray receiver and X-ray tube essentially on the horizontal Axis of rotation. The X-ray receiver is within the guideway of the C- Arranged arc and the guideway extends over the X-ray receiver  out. This makes it possible for the C-arm to be rotated in such a way that the X-ray receiver comes to rest in the area of the holder and the beam axis can be aligned parallel to the floor, it is also possible that at horizontal aligned X-ray axis either the X-ray source in the area of the holder comes to lie. The arrangement of the X-ray receiver within the guideway of the C-arm has the disadvantage that the camera housing with the underlying CCD Camera and electronics is only accessible in that the X-ray receiver from C-arm is removed.

A mobile X-ray diagnostic device is also known on the market ("ORBITOR") Picker International, Ohio / U.S.A., company brochure from October 1976), in which the C-arm ends at the housings of the X-ray source and X-ray receiver and with an asymmetrically attached bracket is held on the C-arm Compensating mass for balancing the C-arm, so that the center of mass of the Arrangement of C-arm, X-ray source, X-ray receiver and holder is a horizontal axis of rotation about which the plane of the C-arm can be tilted.

In Fig. 1, a conventional mobile surgical X-ray diagnostic device is shown schematically, in which a horizontal alignment of the central beam is not possible. A height-adjustable column ( 11 ) is arranged on a device trolley ( 1 ), which can be moved on the floor ( 20 ) with rollers ( 21 , 22 ), and has a multi-adjustable bearing ( 12 ) for the horizontal axis of rotation ( 13 ) of the C -Arch ( 3 ) holds. A bracket ( 9 ) is rotatably arranged on the bearing ( 12 ) for the horizontal axis of rotation ( 13 ). The holder ( 9 ) holds the C-arm ( 3 ) which can be displaced along its circumference in the region of the guide track ( 2 ) and is arranged asymmetrically to the horizontal axis of rotation ( 13 ). The C-arm ( 3 ) carries at one end an X-ray source ( 5 ) with a focal spot ( 7 ) and at the opposite end an X-ray receiver ( 4 ) with a camera housing ( 8 ), the central beam ( 6 ) of the X-ray beam passing through the center of the Input window of the X-ray receiver ( 4 ) runs. The length of the guideway ( 2 ) is limited and the displaceability of the C-arm is restricted by the arrangement of the X-ray source ( 5 ) and the X-ray receiver ( 4 ) on the C-arm ( 3 ). A suitable arrangement of the holder makes it possible to move the C-arm in such a way that the central beam ( 6 ) is arranged horizontally in space and parallel to the floor ( 20 ); however, in practice in which the greatest possible clear width between the x-ray emitter ( 5 ) and the x-ray receiver ( 4 ) is desired, it is not possible to arrange the center of mass ( 14 ) on the horizontal axis of rotation ( 13 ). In practical use, an X-ray diagnostic device whose C-arm is not balanced, ie in which the center of mass ( 14 ) is not on the horizontal axis of rotation, is difficult to adjust manually and is unsafe because, when the brake is released for the horizontal axis of rotation ( 13 ) a torque on the C-arm (3) acts, the rapid and undesirable changes in position (3) may cause the C-arm.

In Fig. 2 shows a known X-ray diagnostic device is illustrated with a balancing mass (18) on a cantilever arm (10), said cantilever arm (10) is arranged on the holder (9). The C-arm ( 3 ) has a guide track ( 2 ) which ends at the X-ray source ( 5 ) and at the X-ray receiver ( 4 ). The holder ( 9 ), which is arranged asymmetrically to the horizontal axis of rotation ( 13 ), has a recess ( 17 ) in which the camera housing ( 8 ) of the X-ray receiver ( 4 ) is immersed. The bracket ( 9 ) and the recess ( 17 ) are arranged so that the C-arm ( 3 ) can be moved along its circumference so far that the central beam ( 6 ) of the X-ray beam comes to lie horizontally and parallel to the floor ( 20 ) , A cantilever arm ( 10 ) is arranged on the holder ( 9 ) and rigidly connected to it, such that the camera housing ( 8 ) can be moved past the cantilever arm ( 10 ) without collision. The cantilever arm can have a handle ( 16 ) by means of which the C-arm ( 3 ) can be rotated ergonomically about the horizontal axis of rotation ( 13 ). The cantilever arm ( 10 ) carries a balancing mass ( 18 ) which is optionally distributed homogeneously or inhomogeneously in the cantilever arm ( 10 ). In particular, it is conceivable to achieve the moment required for the displacement of the center of mass ( 14 ) on the horizontal axis of rotation ( 13 ) by essentially unifying the balancing mass ( 18 ) in the handle ( 16 ) on a substantially massless extension arm ( 10 ) is. With an X-ray diagnostic device as shown in FIG. 2, it is possible to align the central beam ( 6 ) horizontally when the X-ray source ( 5 ) is opposite the holder ( 9 ). A horizontal position of the central beam ( 6 ) with an X-ray receiver opposite the holder ( 9 ) cannot be achieved with such an arrangement.

The object of the invention is to provide a maintenance-friendly version of a C-arm ( 3 ) with an X-ray source ( 5 ) and an X-ray receiver ( 4 ) and a holder ( 9 ) which enables the central beam ( 6 ) to be arranged horizontally, optionally with the X-ray receiver ( 4 ) or the X-ray source ( 5 ) comes to rest in the area of the holder ( 9 ) and in which the horizontal axis of rotation ( 13 ) of the bearing ( 12 ) through the center of mass ( 14 ) of the arrangement of C-arm ( 3 ), X-ray source ( 5 ), X-ray receiver ( 4 ) and holder with all components arranged on the holder ( 9 ).

The object of the invention is achieved by a novel combination of already known construction principles in that the X-ray receiver ( 4 ) with the camera housing ( 8 ) outside the guideway ( 2 ) of the C-arm ( 3 ), the X-ray source ( 5 ) inside the C- Bow ( 3 ) and within the guide track ( 2 ) and on the asymmetrical to the horizontal axis of rotation ( 13 ) arranged bracket ( 9 ) of the C-arm ( 3 ) a cantilever arm ( 10 ) with a compensating mass ( 18 ) is provided.

The invention is explained in more detail with the aid of the figures. In Fig. 3 and 4, an X-ray diagnostic device according to the invention is shown, wherein the X-ray source (5) is arranged within the guide track (2) of the C-arm (3) and the guide track (2) of the C-arm (3) to the, the housing of the X-ray receiver ( 4 ) opposite the X-ray emitter ends, so that the camera housing ( 8 ) is arranged outside the guideway ( 2 ) and the camera arranged in the camera housing ( 8 ) is easily accessible for maintenance and repair purposes without dismantling the X-ray receiver ( 4 ) , It is advantageous to design the camera housing ( 8 ) in such a way that after removal of the same, all connections of the X-ray receiver ( 4 ) and the holding means with which the X-ray receiver is held on the C-arm ( 3 ) are easily accessible. As already described in FIG. 2, the holder has a balancing mass ( 18 ). The arrangement of the X-ray source ( 5 ) within the guideway ( 2 ) allows the X-ray source ( 5 ) to be overrun; that is, it is possible to position the X-ray source ( 5 ) directly on the holder ( 9 ) by displacing the C-arm ( 3 ) along its circumference. This orientation of the C-arm ( 3 ) is shown schematically in Fig. 4. By rotating the C-arm ( 3 ) around its center by about 180 degrees, the X-ray receiver ( 4 ) with the camera housing ( 8 ) comes to rest in the area of the holder ( 9 ). With such an arrangement of balancing mass ( 18 ), X-ray source ( 5 ) and X-ray receiver ( 4 ), it is possible to achieve a horizontal position of the central beam, the operator of the X-ray diagnostic device being free to choose the position of the C-arm in such a way that the X-ray source ( 5 ) or else the X-ray receiver ( 4 ) is arranged on the holder ( 9 ).

It is irrelevant to the invention whether the extension arm ( 10 ) and the holder ( 9 ) are made in one piece or in several pieces. The cantilever arm can be designed as part of the cladding of the bracket. The cantilever arm is designed as a hollow profile with a substantially U-shaped cross-section, the open side of the hollow profile being arranged towards the guideway and the camera housing ( 8 ) being able to dip into the free space of the hollow profile without collision.

List of pictures

Fig. 1 Conventional X-ray diagnostic device with a C-arm

Fig. 2 X-ray diagnostic device with cantilever arm on the bracket

Fig. 3 X-ray diagnostic device according to the invention with cantilever arm and rollable X-ray emitter, central beam vertical

Fig. 4 X-ray diagnostic device according to the invention with cantilever arm and rollable X-ray emitter, central beam horizontal

LIST OF REFERENCE NUMBERS

1

trolley

2

guideway

3

C-arm

4

X-ray receiver

5

X-ray source

6

central beam

7

focal spot

8th

camera housing

9

bracket

10

boom

11

height adjustable column

12

Bearing for horizontal axis of rotation

13

horizontal axis of rotation

14

Center of mass

15

handle

16

handle

17

recess

18

Leveling compound

20

floor

21

role

22

role

Claims (6)

1. Mobile surgical X-ray diagnostic device with a bearing for a C-arm ( 3 ), consisting of a C-arm ( 3 ) with an X-ray source ( 5 ) and an X-ray receiver ( 4 ) attached to the opposite end of the C-arm ( 3 ) a camera housing ( 8 ), the C-arm ( 3 ) being held displaceably along its circumference on a guide track ( 2 ) by a holder ( 9 ) mounted on a vertical, height-adjustable column ( 11 ) and the holder ( 9 ) together with the C-arm ( 3 ) is rotatably mounted in a bearing ( 11 ) at least about a horizontal axis of rotation ( 13 ) which passes through the center of mass ( 14 ) of the X-ray source ( 5 ), C-arm ( 3 ), X-ray receiver ( 4 ), Bracket ( 9 ) and all components arranged on the bracket ( 9 ), characterized in that the bracket ( 9 ) acts asymmetrically with respect to the horizontal axis of rotation ( 13 ) on the C-arm ( 3 ) and on de r bracket ( 9 ) a cantilever arm ( 10 ) is arranged, which extends along the guideway ( 2 ) of the C-arm ( 3 ) in the direction of the X-ray receiver ( 4 ) and carries a compensating mass ( 18 ) at its end and that the guideway ( 2 ) of the C-arm ( 3 ) ends on the housing of the X-ray receiver ( 4 ) and that the X-ray source ( 5 ) is arranged inside the C-arm ( 3 ) and the guideway ( 2 ) over the area of the X-ray source ( 5 ) the axis of the central beam ( 6 ) extends. 2. Mobile surgical X-ray diagnostic device according to claim 1, characterized in that the cantilever arm ( 10 ) is arranged at a distance from the guideway ( 2 ) of the C-arm ( 3 ) which is at least 2 mm larger than the maximum height of the camera housing ( 8 ) over the cylinder surface, which is defined by the guide track ( 2 ). 3. Mobile surgical x-ray diagnostic device according to one of claims 1 to 2, characterized in that the cantilever arm ( 10 ) at its end facing the x-ray receiver ( 4 ) has a handle in which the compensating mass ( 18 ) is arranged. 4. Mobile surgical X-ray diagnostic device according to one of claims 1 to 3, characterized in that the cantilever arm ( 10 ) consists of a hollow profile with a substantially U-shaped and to the guideway ( 2 ) open cross-section that the camera housing ( 8 ) in the space formed by the hollow profile between the guideway ( 2 ) and cantilever arm ( 10 ) can be moved without collision and that the compensating mass ( 18 ) is arranged in the hollow profile. 5. Mobile surgical x-ray diagnostic device according to one of claims 1 to 4, characterized in that the holder ( 9 ) has a recess ( 17 ) which at least partially accommodates the camera housing ( 8 ) with horizontal alignment of the central beam ( 6 ). 6. Mobile surgical x-ray diagnostic device according to one of claims 1 to 5, characterized in that the camera housing ( 8 ) on the housing of the x-ray receiver ( 4 ) is arranged and is releasably held by suitable holding means and that after releasing the camera housing ( 8 ) the holding means for holding the X-ray receiver ( 4 ) on the C-arm ( 3 ) is freely accessible.