DE202017001136U1 - Arrangement with a rotatable X-ray detector for medical imaging and angiography system - Google Patents

Abstract

Arrangement with a medical imaging X-ray detector (4), rotatably mounted on a device part (2), wherein the first axis of rotation (11) is perpendicular to the detector surface, characterized by: - a multi-functional rotary feedthrough (10) with rotary transducers, which is formed , optical signals, electrical signals, electrical power and / or liquids between the X-ray detector (4) and the device part (2) and vice versa.

Description

Field of the invention

The invention relates to an arrangement with a rotatable X-ray detector for medical imaging and an angiography system with a rotatable X-ray detector.

Background of the invention

In X-ray angiography systems, it is necessary in clinical operation to rotate the X-ray detector about its central axis in order to record images in portrait and landscape format. It is known that the cables and lines (media hoses, fiber optic cables, power cables, etc.) are guided through a hollow shaft of the detector holder and loaded during rotation to torsion. This results in significant mechanical stress on the cables and leads, resulting in a potential failure of the angiographic system during operation. In addition, the current cable and cable routing the angle of rotation of the X-ray detector is usually limited to + -90 °.

Alternatively, the cables and wires can be run in an energy chain with S-blow. In this case, the permissible bending radii of the cables and lines are usually greatly undercut due to the very limited Eibauraums. This also leads to damage to the cables and wires during operation.

Summary of the invention

It is therefore an object of the invention to provide an arrangement with an X-ray detector and an angiography system with an X-ray detector, in which the mechanical loading of cables and lines of the X-ray detector are minimized.

According to the invention, the stated object is achieved with the arrangement and the angiography system of the independent claims. Advantageous developments are specified in the dependent claims.

According to the invention, a multifunctional rotary feedthrough with rotary transmitters instead of cables and cables is preferably used in conjunction with a torque motor. This makes it possible to perform a rotation of the X-ray detector in both directions of rotation without restrictions of the rotation angle. Furthermore, by using this solution, no moving cables and lines in this area are required.

The cables and cables are connected to the rotary feedthrough on the fixed bearing side. The rotary movement is realized in the rotary feedthrough. On the floating bearing side then short cable and line pieces are connected to the X-ray detector. These cables and lines rotate with the X-ray detector and the rotary feedthrough and are thus laid stationary to their environment. Damage to cables and wires due to torsion or bending stress with very narrow radii is thereby excluded.

The invention claims an arrangement with an X-ray detector for medical imaging, rotatably mounted on a device part, wherein the axis of rotation is perpendicular to the detector surface and wherein a multi-functional rotary feedthrough with Drehübertragern, which is formed optical signals, electrical signals, electrical power and / or Transfer liquids between the X-ray detector and the device part and vice versa.

The invention offers the advantage that no pre-damage of the cables and lines by torsional or Biegewechselbelastung done. The rotation angle in both directions is unlimited when using a torque motor with rotary feedthrough. By recording the rotational movement directly in the rotary feedthrough, there is no cable movement relative to the environment. The quality costs due to cable damage are reduced.

In a further development, the device part can form the fixed bearing side and the X-ray detector the floating bearing side of the multifunctional rotary feedthrough.

In a further embodiment, the device part may be a C-arm.

In one development, the X-ray detector has a torque motor that is set up to rotate the X-ray detector.

In one development, the X-ray detector has cables and lines which connect the X-ray detector to the multifunctional rotary feedthrough.

The invention also claims an angiography system with an X-ray source and with an arrangement according to the invention.

Other features and advantages of the invention will become apparent from the following explanations of several embodiments with reference to schematic drawings.

Show it:

1 : a spatial view of an angiography system,

2 : An X-ray detector with a multifunctional rotary feedthrough in cross section and

3 : An X-ray detector with a torque motor in cross section.

Detailed description of several embodiments

1 shows an angiography system 1 comprising a C-arm 2 , at one end of which is an X-ray source 3 is arranged and at the other end an X-ray detector 4 , Here is a flat panel detector comprising a radiation-sensitive pixel matrix, is arranged. The x-ray detector 4 is about a perpendicular to its Bildaufnahme- or matrix plane rotation axis via a drive means, for example via a torque motor, rotatable about the first rotational direction A.

The C-arm 2 consists in the embodiment shown of a first arc sections 5 and a second arc section 6 , which can be displaced relative to each other along the first displacement direction B, by the distance of the X-ray source 3 to the X-ray detector 4 to vary.

The C-arm 2 itself is located on a carrier unit 7 , in turn, on a pillar 8th is arranged. The carrier unit 7 is along the pillar 8th in the second direction of displacement C vertically movable. It is also along the second direction of rotation D relative to the column 8th also rotatable about a horizontal axis, so that the entire C-arm 2 not only moved vertically but also can be rotated about a horizontal axis.

Furthermore, there is the possibility of the column 8th in the third direction of rotation E to rotate about a vertical axis. The basic structure of such a C-arm 2 and its storage respectively its individual degrees of freedom of movement are known.

As described, the X-ray detector 4 around a first axis of rotation axis perpendicular to its image recording plane 11 rotatable. For this purpose, a motor drive means, wherein preferably a torque motor, ie a direct drive, is used. To protect invisible cables and wires from torsion, the X-ray detector has 4 in its interior a multifunctional rotary union 10 at the same time as a rotating connection between the X-ray detector 4 and the C-arm 2 serves.

2 shows an X-ray detector 4 who is working on a C-arm 2 is rotatably mounted, in cross section. For transmission of electrical energy, electrical signals, optical signals and coolant between the C-arm 2 and the X-ray detector 4 serves one around a first axis 11 rotatable multifunctional rotary union 10 , This can transmit electrical and optical signals as well as cooling fluid even with rotation with the help of rotary transmitters. In the rotatable X-ray detector 4 and in the fixed C-arm 2 is the rotary feedthrough 10 with wires 13 and cables 12 connected. These are not exposed to torsion. The first axis of rotation 11 is perpendicular to the detector surface of the X-ray detector 4 ,

3 shows a cross section through an X-ray detector 4 and a torque motor 9 who is working on a C-arm 2 is attached. Here is the stator 14 of the torque motor 9 with the C-bow 2 whereas the rotor is connected 15 of the torque motor with the X-ray detector 4 connected is. The multifunctional rotary feedthrough 10 lies inside the torque motor 9 , In the published patent application DE 10 2014 202 013 A1 is such an arrangement of a torque motor 8th described.

Although the invention has been further illustrated and described in detail by the embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

1

Angiografiesystem

2

C-arm

3

X-ray source

4

X-ray detector

5

first arc section

6

second arc section

7

support unit

8th

pillar

9

torque motor

10

multifunctional rotary feedthrough

11

first axis of rotation

12

electric wire

13

management

14

Stator of the torque motor 8th

15

Rotor of the torque motor 9

A

first direction of rotation

B

first shift direction

C

second shift direction

D

second direction of rotation

e

third direction of rotation

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014202013 A1 [0026]

Claims (6)

Arrangement with an X-ray detector ( 4 ) for medical imaging, rotatably mounted on a device part ( 2 ), wherein the first axis of rotation ( 11 ) is perpendicular to the detector surface, characterized by: - a multifunctional rotary feedthrough ( 10 ) with rotary transducers, which is formed, optical signals, electrical signals, electrical power and / or liquids between the X-ray detector ( 4 ) and the device part ( 2 ) and vice versa. Arrangement according to claim 1, characterized in that the device part ( 2 ) the fixed bearing side and the X-ray detector ( 4 ) the floating bearing side of the multi-functional rotary union ( 10 ). Arrangement according to one of the preceding claims, characterized in that the device part a C-arm ( 2 ). Arrangement according to one of the preceding claims, characterized by: - a torque motor ( 9 ), which is set up, the X-ray detector ( 4 ) to turn. Arrangement according to one of the preceding claims, characterized by: - cable ( 12 ) and lines ( 13 ) the X-ray detector ( 4 ) with the multifunctional rotary feedthrough ( 10 ) connect. Angiography system ( 1 ) with an X-ray source ( 3 ) and with an arrangement according to one of the preceding claims.

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