Arrangement with a stationary part and a first rotating part of a gantry of a computed tomography device and method for maintaining a component of a gantry of a computed tomography device

Abstract

Arrangement (1), comprising - a stationary part (S0) of a gantry (20) of a computer tomography device (2) and a first rotating part (R1) of the gantry (20) of the computer tomography device (2), - wherein the first rotating part (R1) and the stationary part (S0) can be connected to one another by means of a bearing assembly (BG), that the first rotating part (R1) is arranged in a bearing position relative to the stationary part (S0) and is rotatably mounted about a system axis (AR) by means of the bearing assembly (BG), - wherein the first rotating part (R1) and the stationary part (S0) can be connected to one another by means of a holding device (3) in such a way, that the first rotating part (R1) is arranged in a holding position relative to the stationary part (S0) independently of the bearing assembly (BG), - wherein both in the storage position and in the holding position, a central opening (OR1) of the first rotating part (R1) and a central opening (OS0) of the stationary part (S0) are arranged around the system axis (AR), - wherein, in a first operating state of the arrangement (1), the first rotating part (R1) and the stationary part (S0) are connected to one another by means of the holding device (3) such that the first rotating part (R1) is arranged in the holding position relative to the stationary part (S0) independently of the bearing assembly (BG), - wherein in the first operating state of the arrangement (1), a connection of the bearing assembly (BG) to the first rotating part (R1) and a connection of the bearing assembly (BG) to the stationary part (S0) is detachable, - wherein in the first operating state of the arrangement (1) the bearing assembly (BG) can be removed parallel to the system axis (AR) from an intermediate space (G01) which is formed between the first rotating part (R1) and the stationary part (S0) for receiving the bearing assembly (BG).

Description

The invention relates to an arrangement having a stationary part of a gantry of a computed tomography device and a first rotating part of the gantry of the computed tomography device, wherein the first rotating part and the stationary part can be connected to one another by means of a bearing assembly in such a way that the first rotating part is arranged in a storage position relative to the stationary part and is mounted rotatably about a system axis. The invention further relates to a method for maintaining a component of a gantry of a computed tomography device, wherein a first rotating part of the gantry and a first stationary part of the gantry can be connected to one another by means of a bearing assembly in such a way that the first rotating part is arranged in a storage position relative to the first stationary part and is rotatably mounted about an axis of rotation.The prior art to be mentioned here is DE 10 2005 050 634 A1 and DE 10 2013 224 886 A1.A computed tomography device typically has a bearing assembly for rotatably mounting a first rotating part, on which, for example, a radiation source and / or a radiation detector are arranged, relative to a stationary part, which can have, for example, a supporting frame and / or a tilting frame. In order to service, in particular replace and / or repair, the bearing assembly, for example in the event of damage to the bearing, it is typically necessary in conventional concepts to expose the bearing assembly by dismantling the gantry, wherein the first rotating part is separated from the stationary part and is arranged separately from the stationary part. Alternatively, at the location of use of the computed tomography device, e.g. a medical examination room, an exchange of a first gantry, the bearing assembly of which is to be maintained, for a second gantry can take place. For this purpose, typically dismantling of the stationary cabling of the first gantry is necessary. In the case of a fluid-cooled, in particular water-cooled, gantry, clamping of fluid-conducting parts and / or emptying of cooling modules may additionally be necessary. The first gantry can then be transported into a plant and the storage assembly with the infrastructure available there can be maintained. Both procedures are associated with a high space requirement and with a high outlay in terms of time and costs. In particular, the dismantling of the gantry on site and the subsequent joining and readjustment of the components of the computed tomography device relative to one another can be susceptible to errors.The object of the invention is to make possible improved maintenance of a component of a gantry of a computed tomography device.This object is achieved in each case by an arrangement according to claim 1 and by a method according to claim 15.The arrangement according to the invention has a stationary part of a gantry of a computed tomography device and a first rotating part of the gantry of the computed tomography device. The first rotating part and the stationary part can be connected to one another by means of a bearing assembly in such a way that the first rotating part is arranged in a storage position relative to the stationary part and / or that the first rotating part is rotatably mounted about a system axis relative to the stationary part by means of the bearing assembly. The first rotating part and the stationary part are connectable to each other by means of a holding device such that the first rotating part is arranged in a holding position relative to the stationary part independently of the bearing assembly. In both the storage position and the holding position, a central opening of the first rotating part and a central opening of the stationary part are arranged around the system axis.According to one embodiment of the invention, the computed tomography device has an imaging data acquisition unit which is designed for acquisition of imaging data. In particular, the imaging data acquisition unit may comprise a radiation source and a radiation detector. One embodiment of the invention provides that the radiation source is designed for emitting and / or exciting a radiation, in particular an electromagnetic radiation, and / or that the radiation detector is designed for detecting the radiation, in particular the electromagnetic radiation. The radiation can, for example, pass from the radiation source to an area to be imaged and / or, after interaction with the area to be imaged, pass to the radiation detector. During the interaction with the region to be imaged, the radiation is modified and thus to the carrier of information relating to the region to be imaged. During the interaction of the radiation with the detector, this information is acquired in the form of the imaging data. In the computed tomography device, the imaging data can be projection data, the imaging data acquisition unit can be a projection data acquisition unit, the radiation source can be an X-ray source, the radiation detector can be an X-ray detector. The X-ray detector can be, in particular, a quantum-counting and / or energy-resolving X-ray detector.The computed tomography device can be, in particular, part of a combination of the computed tomography device with a further imaging modality and / or with an irradiation modality. According to one embodiment of the invention, the further imaging modality is selected from the imaging modality group consisting of an X-ray device, a C-arm X-ray device, a single photon emission computed tomography (SPECT) device, a positron emission tomography (PET) device, a magnetic resonance tomography (MRI) device, and combinations thereof. In this case, the irradiation modality can have, for example, an irradiation unit for therapeutic irradiation.The computed tomography device has the gantry. The gantry includes the stationary portion of the gantry, the bearing assembly, and the first rotating portion of the gantry. In at least one operating state of the gantry, the first rotating part and the stationary part are connected to one another by means of the bearing assembly in such a way that the first rotating part is rotatably mounted relative to the stationary part in a storage position. In the operating state of the gantry, a tunnel-shaped opening and / or a cladding of the tunnel-shaped opening extends substantially parallel to the system axis through the central opening of the first rotating part and through the central opening of the stationary part. A cladding of the tunnel-shaped opening can be understood in particular to mean a part of the cladding of the gantry which delimits the tunnel-shaped opening and / or which separates the tunnel-shaped opening from an inner region of the gantry. A patient can be introduced into the tunnel-shaped opening. An acquisition region is located in the tunnel-shaped opening. In the acquisition region, a region of the patient to be imaged can be positioned in such a way that the radiation from the radiation source can reach the region to be imaged and, after interaction with the region to be imaged, can reach the radiation detector. The central opening of the first rotating part is arranged around the system axis in particular when the system axis penetrates the central opening of the first rotating part. The central opening of the stationary part is arranged around the system axis in particular when the system axis penetrates the central opening of the stationary part. According to an embodiment of the invention, the holding position can be offset relative to the storage position such that in the holding position the system axis penetrates a different location of the central opening of the first rotating part than in the storage position.According to an embodiment of the invention, the bearing assembly comprises a rotating bearing part, a stationary bearing part and a bearing. The rotating bearing member is connected to the first rotating member for common rotation with the first rotating member. The stationary bearing part is fixedly arranged on the stationary part. In the context of this application, the common rotation is to be understood in particular as a common rotation about the system axis. According to one embodiment of the invention, the bearing is a rolling bearing. The rolling bearing has bearing rings with raceways, rolling bodies, for example in the form of balls, and / or a rolling body cage. The rolling bearing is designed for rolling the rolling bodies on the raceways. The rolling bearing can be, for example, a barrel bearing, a ball bearing, a helical bearing, a double-row helical bearing or the like. According to a further embodiment of the invention, the bearing assembly has, as an alternative and / or in addition to the rolling bearing, a fluid bearing and / or a magnetic bearing.The system axis corresponds to the axis of rotation of the bearing assembly and / or of the first rotating part in the at least one operating state of the gantry, in which the first rotating part and the stationary part are connected to one another by means of the bearing assembly in such a way that the first rotating part is rotatably mounted relative to the stationary part in the storage position. Thus, in particular in an operating state of the arrangement in which the first rotating part and the stationary part are not connected to one another by means of the bearing assembly, the position of the system axis relative to the stationary part of the gantry can be defined. According to an embodiment of the invention, the system axis is horizontal and / or substantially horizontal.The holding device is configured to connect the first rotating part and the stationary part according to one of the aspects described in this application. In particular, the first rotating part and the stationary part can be connectable to one another by means of the holding device in such a way that the first rotating part is arranged in the holding position relative to the stationary part independently of the bearing assembly, wherein the first rotating part is fixed relative to the stationary part by means of the holding device and / or wherein a rotational movement of the first rotating part relative to the stationary part about the system axis is prevented by means of the holding device. In particular, the first rotating part and the stationary part can be connectable to one another by means of the holding device in such a way that the first rotating part is arranged in the holding position relative to the stationary part independently of the bearing assembly, wherein a translation movement of the first rotating part relative to the stationary part along the system axis and / or a translation movement of the first rotating part relative to the stationary part perpendicular to the system axis is respectively prevented in at least one direction and / or in two opposite directions by means of the holding device. In particular, the first rotating part and the stationary part can be connectable to one another by means of the holding device in such a way that the first rotating part is arranged in the holding position relative to the stationary part independently of the bearing assembly, wherein the holding device is located within a region defined by the outer periphery of the gantry. This makes it possible to realize a particularly space-saving arrangement.Furthermore, the first rotating part and the stationary part can be connected to one another by means of the holding device starting from the storage position in such a way that the first rotating part is arranged in a holding position relative to the stationary part independently of the bearing assembly.In the context of this application, the first rotating part is to be understood as meaning the first rotating part of the gantry, the second rotating part is to be understood as meaning the second rotating part of the gantry and the stationary part is to be understood as meaning the stationary part of the gantry. In the context of this application, the holding position is to be understood as the holding position of the first rotating part relative to the stationary part and the storage position is to be understood as the storage position of the first rotating part relative to the stationary part.Because the first rotating part is arranged in a holding position relative to the stationary part independently of the bearing assembly, the bearing assembly is relieved. The invention thus enables improved maintenance of the bearing assembly. Furthermore, the invention enables improved maintenance, in particular of components of the gantry, during the maintenance of which forces and / or torques are generated, which are passed on from the first rotating part and / or from the second rotating part to the stationary part. By relieving the load on the bearing assembly by means of the retaining device, the bearing assembly is protected from these forces and / or moments. Furthermore, the invention enables improved maintenance, in particular of components of the gantry, during the maintenance of which forces and / or torques are generated, which cannot be passed on by means of the bearing assembly, for example because a rotation of the first rotating part about the system axis is thereby effected.Furthermore, the invention enables simplified removal of the bearing assembly and thus improved maintenance, in particular of those components of the gantry which are covered by the bearing assembly. The component to be maintained may be, for example, the bearing assembly, the radiation source, the radiation detector, the second rotating part, the rotor-side data transmission unit, the rotor-side power transmission unit, or the like. In particular during maintenance of a component that is not the bearing assembly, it may be appropriate under certain circumstances to only partially relieve the bearing assembly by means of the holding device and / or to pass on the forces and / or moments generated during maintenance partially via the bearing assembly and partially via the holding device.In the solution according to the invention, in particular disassembly of the gantry, wherein the first rotating part is separated from the stationary part and arranged separately from the stationary part, is not necessary. In particular, a stationary wiring of the gantry does not need to be uninstalled. In a fluid-cooled gantry, no additional measures, in particular no emptying of cooling modules, are required. In the solution according to the invention, no external lifting and / or crane tool, in particular no heavy-duty crane, is required for loading the first rotating part. Essential parts of the gantry, in particular the first rotating part and the stationary part, can thus remain for maintenance without a substantial increase in the space requirement and / or without a substantial change in the position at the location of use of the computed tomography device, e.g. a medical examination room. In particular, no structural measures, for example widening of door openings, stabilizing double floors, etc., are necessary. Transport of the storage assembly and / or components required for maintenance, which have a significantly lower weight compared to the gantry, can be realized with a significantly lower outlay in terms of time, logistics costs and infrastructure.In particular, due to the small space requirement, the position of a patient support device relative to the gantry, in particular relative to the stationary part, does not need to be changed in the solution according to the invention in order to enable maintenance. Thus, a renewed adjustment of the patient support device relative to the gantry after maintenance is not necessary. A special adjustment of the components, in particular of the components arranged on the first rotating part for a common rotation with the first rotating part, for example of the radiation source and / or the radiation detector, after maintenance is likewise not necessary in the solution according to the invention. With the solution according to the invention, maintenance of a component of the gantry, in particular of the bearing assembly, can be realized with a smaller space requirement, with a smaller outlay in terms of time and costs and with a lower susceptibility to errors.Alternatively and / or additionally to the fact that both in the storage position and in the holding position a central opening of the first rotating part and a central opening of the stationary part are arranged around the system axis, it can be provided that the holding position and the storage position are coaxial with respect to the system axis and / or that the holding position and the storage position coincide with respect to the position along the system axis. The holding position and the storage position can be coaxial with respect to the system axis in particular if the holding position and the storage position differ with respect to a position along the system axis, that is to say are offset with respect to one another along the system axis. The holding position and the storage position can coincide in relation to the position along the system axis in particular if the holding position and the storage position differ in relation to a position along a direction perpendicular to the system axis, that is to say are offset with respect to one another along a direction perpendicular to the system axis.Alternatively and / or additionally to the fact that both in the storage position and in the holding position a central opening of the first rotating part and a central opening of the stationary part are arranged around the system axis, it can be provided that the holding position and the storage position are identical.In particular, an arrangement is disclosed which comprises a stationary part of a gantry of a computed tomography device and a first rotating part of the gantry of the computed tomography device, wherein the first rotating part and the stationary part can be connected to one another by means of a bearing assembly in such a way that the first rotating part is arranged in a storage position relative to the stationary part and is rotatably mounted about a system axis by means of the bearing assembly, wherein the first rotating part and the stationary part can be connected to one another by means of a holding device in such a way that the first rotating part is arranged in the storage position relative to the stationary part independently of the bearing assembly. This arrangement can be further developed according to one of the aspects of the invention described in this application.According to one aspect of the invention, it is provided that the arrangement is designed to assume a first operating state of the arrangement and / or that the arrangement is in the first operating state of the arrangement. According to the invention, in the first operating state of the arrangement, the first rotating part and the stationary part are connected to one another by means of the holding device in such a way that the first rotating part is arranged in the holding position relative to the stationary part independently of the bearing assembly.According to the invention, in the first operating state of the arrangement, a connection of the bearing assembly to the first rotating part, in particular to the rotor-side connecting device, and a connection of the bearing assembly to the stationary part, in particular to the stator-side connecting device, can be released.According to one aspect of the invention, in the first operating state of the arrangement, a connection of the bearing assembly to a support device for supporting the bearing assembly can be produced and / or released. The support device can be, for example, a crane. The support device can be, in particular, a gantry crane and / or a mobile crane. The crane can be tuned to the bearing assembly in particular and / or be relatively small compared to a crane which is designed for loading the first rotating part.According to the invention, in the first operating state of the arrangement, the bearing assembly can be removed from an intermediate space parallel to the system axis. According to one aspect of the invention, in the first operating state of the arrangement, the bearing assembly can be accommodated in the intermediate space parallel to the system axis. According to a further aspect of the invention, in the first operating state of the arrangement, the bearing assembly can be accommodated in an intermediate space by means of the support device parallel to the system axis and / or can be removed from the intermediate space by means of the support device parallel to the system axis. The intermediate space is formed between the first rotating part and the stationary part for receiving the bearing assembly, in particular is formed in such a way that the first rotating part and the stationary part can be connected to one another by means of a bearing assembly which is located in the intermediate space in such a way that the first rotating part is arranged in the storage position relative to the stationary part and is mounted rotatably about the system axis by means of the bearing assembly.In accordance with one aspect of the invention, the assembly further includes at least one device selected from the group consisting of the bearing assembly, the support device, the support device, the gantry, the computed tomography apparatus, and combinations thereof.In particular, the arrangement can have the bearing assembly and / or the holding device. In particular, the arrangement can have the carrying device. In particular, the arrangement can have the gantry and / or the computed tomography device.According to one aspect of the invention, it is provided that the stationary part has a tilting frame of the gantry and / or a supporting frame of the gantry and / or that the tilting frame is mounted such that it can be tilted about a tilting axis relative to the supporting frame.According to one embodiment of the invention, the stationary part is a tilting frame of the gantry and / or a supporting frame of the gantry. According to one embodiment of the invention, the stationary part is a combination of a tilting frame of the gantry with a supporting frame of the gantry. The support frame is typically arranged fixed relative to a base, for example a floor and / or a base plate, and / or relative to a patient support device. In particular, when the bearing assembly is arranged on the tilting frame, the system axis can be inclined relative to a horizontal plane. In particular, the tilting frame can be mounted relative to the supporting frame by means of a tilting bearing such that it can be tilted about a tilting axis. In particular, the tilting axis can be perpendicular and / or substantially perpendicular to the system axis. In particular, the tilting axis can be horizontal. An inclination of the system axis relative to a horizontal plane can thus be adjusted by means of the tilting bearing. One embodiment of the invention provides that the system axis is horizontal and / or that the system axis is horizontal in the first operating state of the arrangement.According to one aspect of the invention, it is provided that the first rotating part is designed to accommodate a radiation source and / or a radiation detector. According to an embodiment of the invention, the radiation source and / or the radiation detector is arranged on the first rotating part for common rotation with the first rotating part. According to one aspect of the invention, the arrangement further comprises a second rotating part of the gantry. According to one aspect of the invention, the arrangement can assume a second operating state of the arrangement. In the second operating state of the arrangement, the second rotating part is arranged on the bearing assembly and / or on the first rotating part for common rotation with the first rotating part such that the bearing assembly is located between the first rotating part and the second rotating part with respect to a direction parallel to the system axis. According to a further aspect of the invention, in the first operating state of the arrangement, the second rotating part is removed from the bearing assembly and / or from the first rotating part in such a way that the bearing assembly and / or the intermediate space is exposed on a side facing away from the first rotating part with respect to the direction parallel to the system axis, in particular is exposed in such a way that the bearing assembly can be accommodated in an intermediate space parallel to the system axis and / or can be removed from the intermediate space parallel to the system axis.According to one aspect of the invention, it is provided that the second rotating part is formed:receiving a rotor-side data transmission unit of a data transmission device configured for data transmission between the second rotating part and the stationary part, and / orreceiving a rotor-side power transmission unit of a power transmission device configured for power transmission between the second rotating part and the stationary part.In particular, the rotor-side data transmission unit and / or the rotor-side power transmission unit can be arranged on the second rotating part.According to one embodiment of the arrangement, it is provided that the first rotating part is formed:receiving a rotor-side data transmission unit of a data transmission device configured for data transmission between the first rotating part and the stationary part, and / orreceiving a rotor-side power transmission unit of a power transmission device configured for power transmission between the first rotating part and the stationary part. In particular, the rotor-side data transmission unit and / or the rotor-side power transmission unit can be arranged on the first rotating part. The rotor-side data transmission unit can be connected in particular to a component which is arranged on the first rotating part, for example to the radiation source and / or to the radiation detector, for transmitting data, for example control data and / or imaging data, to the component and / or from the component. The rotor-side power transmission unit can be connected in particular to a component which is arranged on the first rotating part, for example to the radiation source and / or to the radiation detector, for transmitting power to the component.According to a further embodiment of the invention, it is provided that, in particular in the operating state of the gantry, the second rotating part is arranged on the bearing assembly and / or on the first rotating part for common rotation with the first rotating part in such a way that the second rotating part is located between the first rotating part and the bearing assembly with respect to a direction parallel to the system axis. According to one embodiment of the invention, it is provided that, in particular in the functional operating state of the gantry, the bearing assembly and / or the intermediate space is exposed on a side facing away from the first rotating part with respect to a direction parallel to the system axis, in particular is exposed in such a way that the bearing assembly can be accommodated in an intermediate space parallel to the system axis and / or can be removed from the intermediate space parallel to the system axis. In the context of this application, a given component is in particular on the rotor side when the given component is assigned to the first rotating part and / or the second rotating part. In the context of this application, a given component is in particular on the stator side when the given component is assigned to the stationary part. The data transmission device can be designed, for example, for contactless data transmission and / or for contacting data transmission between the second rotating part and the stationary part. The contacting data transmission can take place in particular by means of a slip ring. In particular, the second rotating part and / or the rotor-side data transmission unit can have the slip ring.According to one aspect of the invention, it is provided that the holding device is configured for a releasable and / or positive connection to the first rotating part, in particular to the rotor-side connecting device, and / or for a releasable and / or positive connection to the stationary part, in particular to the stator-side connecting device.According to one aspect of the invention, it is provided that the first rotating part has at least one rotor-side connecting device which is designed for a releasable and / or positive connection to the holding device, in particular is designed such that the first rotating part, in particular the rotor-side connecting device, and the stationary part, in particular the stator-side connecting device, can be connected to one another by means of the holding device such that the first rotating part is arranged in a holding position relative to the stationary part independently of the bearing assembly, wherein a central opening of the first rotating part and a central opening of the stationary part are arranged around the system axis both in the storage position and in the holding position. According to a further aspect of the invention, it is provided that the stationary part has at least one stator-side connecting device which is designed for a releasable and / or positive connection to the holding device, in particular is designed such that the first rotating part, in particular the rotor-side connecting device, and the stationary part, in particular the stator-side connecting device, can be connected to one another by means of the holding device such that the first rotating part is arranged in a holding position relative to the stationary part independently of the bearing assembly, wherein a central opening of the first rotating part and a central opening of the stationary part are arranged around the system axis both in the storage position and in the holding position.Both the rotor-side connecting device and the stator-side connecting device can each have one connecting element or a plurality of connecting elements, which can be spatially separated from one another, for example. The connecting element and / or each of the plurality of connecting elements may be selected from, for example, the group of connecting elements consisting of a thread, a threaded insert, a coupling, a holder, a shoulder, a depression, a bearing surface, a bearing point and combinations thereof. In particular, the support surface can be planar and / or curved.According to one aspect of the invention, it is provided that the holding device has an axial part of the holding device, wherein the first rotating part and the stationary part can be connected to one another by means of the axial part of the holding device in such a way that the first rotating part is arranged in the holding position relative to the stationary part independently of the bearing assembly with respect to the position along the system axis. In particular, when a connection of the bearing assembly to the first rotating part is released, a tilting movement of the first rotating part about a horizontal axis perpendicular to the system axis can be prevented by means of the axial part of the holding device.According to one aspect of the invention, it is provided that the holding device has a radial part of the holding device, wherein the first rotating part and the stationary part can be connected to one another by means of the radial part of the holding device in such a way that the first rotating part is arranged in the holding position relative to the stationary part independently of the bearing assembly with respect to the position along a direction perpendicular to the system axis. In this way, the bearing assembly can be relieved, in particular with respect to forces which act on the first rotating part and / or are brought about by the first rotating part in a direction perpendicular to the system axis.According to one aspect of the invention, it is provided that the holding device has a holding element which is selected from the holding element group, or a plurality of holding elements which are each selected from the holding element group. The retaining element group consists of a screw, a threaded sleeve, a spacer sleeve, a bolt, a threaded bolt, a parking foot, a screwing device, a supporting device, a lifting device, a car lifter, an air cushion, an eccentric device, a wedge device, a retaining segment, a retaining frame and combinations thereof.In particular, the holding device can have a plurality of different holding elements, which are each selected from the holding element group. The plurality of holding elements of the holding device can be separated from one another in particular spatially. In particular, a holding element of the holding device can be configured for a releasable and / or positive connection to a connecting element of the stator-side connecting device and / or to a connecting element of the rotor-side connecting device. The threaded sleeve can have, for example, an internal thread and / or an external thread. The lifting device can be, for example, a scissor lifting device.In the method according to the invention for maintaining a component of a gantry of a computed tomography device, it is provided that a first rotating part of the gantry and a stationary part of the gantry can be connected to one another by means of a bearing assembly in such a way that the first rotating part is arranged in a storage position relative to the stationary part and that the first rotating part is mounted rotatably about a system axis relative to the stationary part by means of the bearing assembly.The method according to the invention comprises the following steps:connecting the first rotating part and the stationary part by means of a holding device such that the first rotating part is arranged in a holding position relative to the stationary part independently of the bearing assembly, wherein in the holding position a central opening of the first rotating part and a central opening of the stationary part are arranged about the system axis,Maintenance of the component of the gantry.According to one aspect of the invention, it is provided that the maintenance of the component of the gantry comprises a repair of the component of the gantry and / or a replacement of the component of the gantry.According to one aspect of the invention, it is provided that a connection of the bearing assembly to the first rotating part and / or a connection of the bearing assembly to the stationary part is established and / or released.According to one aspect of the invention, it is provided that a connection of the bearing assembly to a support device for supporting the bearing assembly is established and / or released.According to one aspect of the invention, it is provided that the bearing assembly is accommodated parallel to the system axis in a space which is formed between the first rotating part and the stationary part for accommodating the bearing assembly, and / or is removed from the space parallel to the system axis.According to one aspect of the invention, it is provided that a second rotating part is removed from the bearing assembly and / or from the first rotating part in such a way that the bearing assembly and / or the intermediate space is exposed on a side facing away from the first rotating part with respect to a direction parallel to the system axis, in particular is exposed in such a way that the bearing assembly can be accommodated in an intermediate space parallel to the system axis and / or can be removed from the intermediate space parallel to the system axis. According to a further aspect of the invention, it is provided that the second rotating part is arranged on the bearing assembly and / or on the first rotating part for common rotation with the first rotating part, in particular is arranged in such a way that the bearing assembly is located between the first rotating part and the second rotating part with respect to the direction parallel to the system axis.According to one aspect of the invention, it is provided that the component of the gantry is the bearing assembly and / or that the component of the gantry is arranged on at least one device selected from the group consisting of the bearing assembly, the first rotating part, the stationary part and combinations thereof.According to one aspect of the invention, it is provided that a second rotating part is arranged on the bearing assembly and / or on the first rotating part for common rotation with the first rotating part and that the component of the gantry is the second rotating part and / or is arranged on the second rotating part.According to one aspect of the invention, it is provided that the method according to the invention is carried out according to one of the aspects described in this application with an arrangement according to one of the aspects described in this application.Within the scope of the invention, features which are described with reference to different embodiments of the invention and / or different claim categories (apparatus, method, etc.) can be combined to form further embodiments of the invention. In other words, the subject claims can also be further developed with the features described or claimed in connection with a method. Functional features of a method according to the invention can be carried out by correspondingly designed physical components. In addition to the embodiments of the invention expressly described in this application, numerous further embodiments of the invention are conceivable, to which the person skilled in the art can arrive without departing from the scope of the invention, insofar as it is specified by the claims.The use of the indefinite article "a" or "an" does not exclude that the feature concerned can also be present multiple times. The use of the term "comprise" does not exclude that the terms linked by the term "comprise" may be identical. For example, the medical imaging device includes the medical imaging device. The use of the term "unit" does not exclude that the subject matter to which the term "unit" refers may have multiple components that are spatially separated from each other. The use of ordinal number words (first, second, third, etc.) in the designation of features serves, in the context of the present application, above all for better distinguishability of the features designated using ordinal number words. The absence of a feature designated by a combination of a given ordinal number word and a term does not exclude that a feature designated by a combination of an ordinal number word subsequent to the given ordinal number word and the term may be present. Furthermore, it is not excluded that, when executing a method according to any of the embodiments described in this application, a feature which is designated by a combination of a given ordinal number word and a term, for example a second operating state, is realized earlier in terms of the temporal sequence than a feature which is designated by a combination of an ordinal number word preceding the given ordinal number word and the term, for example a first operating state.The expression "based on" can be understood in the context of the present application in particular in the sense of the expression "using". In particular, a formulation that is created (alternatively: determined, determined, etc.) according to a first feature based on a second feature does not exclude that the first feature can be created (alternatively: determined, determined, etc.) based on a third feature.The invention is explained in more detail below with reference to the attached figures on the basis of exemplary embodiments. The illustration in the figures is schematic and greatly simplified and not necessarily true to scale. In the context of this application, a term provided with a reference sign can be understood to mean an exemplary embodiment of the equivalent term, which is not provided with a reference sign. If different reference numerals are used for a term, these can be in particular different exemplary embodiments for this term.The following are shown: FIG. 1 shows a schematic illustration of a gantry of a computed tomography device, FIG. 2 shows a schematic illustration of a bearing assembly, FIG. 3 shows a schematic illustration of a gantry of a computed tomography apparatus and a crane apparatus, FIGS. 4 and 5 each show a schematic illustration of the arrangement according to a first embodiment of the invention, FIGS. 6 and 7 each show a schematic illustration of the arrangement according to a second embodiment of the invention, FIG. 8 shows a schematic illustration of the arrangement according to the first embodiment of the invention in a first operating state, FIG. 9 shows a schematic illustration of a holding element of a holding device of an arrangement according to a third embodiment of the invention, FIGS. 10 and 11 each show a schematic illustration of the arrangement according to a fourth embodiment of the invention, FIGS. 12 and 13 each show a schematic illustration of the arrangement according to a fifth embodiment of the invention, FIGS. 14 and 15 each show a schematic illustration of the arrangement according to a sixth embodiment of the invention, FIG. 16 is a schematic illustration of the arrangement according to a seventh embodiment of the invention, FIG. 17 is a schematic illustration of the arrangement according to an eighth embodiment of the invention, FIG. 18 is a schematic illustration of the arrangement according to a ninth embodiment of the invention, FIGS. 19 and 20 each show a schematic illustration of the arrangement according to a tenth embodiment of the invention, FIG. 21 is a schematic illustration of the arrangement according to an eleventh embodiment of the invention, FIG. 22 is a schematic illustration of the arrangement according to a twelfth embodiment of the invention, FIG. 23 is a flow diagram of a method for maintaining a component of a gantry of a computed tomography device according to a fourth embodiment of the invention.FIG. 1 shows a schematic representation of a gantry 20 of a computed tomography device 2. the gantry 20 has the stationary part S 0 of the gantry 20, the bearing assembly BG, the first rotating part R 1 and the second rotating part R 2. FIG. 1 shows the gantry 20 in the at least one operating state of the gantry 20. The first rotating part R 1 and the stationary part S 0 are connected to each other by means of the bearing assembly BG such that the first rotating part R 1 is rotatably supported about the system axis AR in a storage position relative to the stationary part S 0. The central opening OR 1 of the first rotating part R 1 and the central opening OS 0 of the stationary part S 0 are arranged around the system axis AR. In the operating state of the gantry 20, the tunnel-shaped opening 9 and / or a cladding of the tunnel-shaped opening 9 extends substantially parallel to the system axis AR through the central opening OR 1 of the first rotating part R 1 and through the central opening OS 0 of the stationary part S 0. Furthermore, in the operating state of the gantry 20, the tunnel-shaped opening 9 and / or the cladding of the tunnel-shaped opening 9 extends through the central opening OR 2 of the second rotating part R 2 substantially parallel to the system axis AR. The first rotating part R 1 includes a rotor wall R 1D having a substantially shape of a first ring disk and a support ring R 1M. The holding ring R 1M has substantially the shape of a cylinder jacket and is arranged circumferentially on the outer circumference of the rotor wall R 1D. The mounting ring R 1M is designed to accommodate components of the gantry 20, in particular the radiation source 26, the radiation detector 28 and the collimator CX. The rotor wall R 1D and the mounting ring R 1M together form a drum-shaped frame, which is also known to the person skilled in the art under the term "drum". The first rotating part R 1 includes the drum-shaped frame.The second rotating part R 2 is disposed on the bearing assembly BG for common rotation with the first rotating part R 1 such that the bearing assembly BG is located between the first rotating part R 1 and the second rotating part R 2 with respect to the system axis AR. On the second rotating part R 2, the rotor-side data transmission unit and the rotor-side power transmission unit are arranged.The stationary part S 0 is a combination of a tilting frame 22 of the gantry 20 with a supporting frame 21 of the gantry 20. The tilting axis AT is perpendicular and / or substantially perpendicular to the vertical axis AV. The tilting axis AT is horizontal. FIGS. 4 to 21 each show an operating state of the arrangement 1 in which the system axis AR is horizontal.FIG. 2 shows a schematic illustration of the bearing assembly BG. The bearing assembly BG has a rotating bearing part BR, a stationary bearing part BS and a bearing BB, for example a rolling bearing. The bearing rotating part BR is connected by the joint BC 1 to the first rotating part R 1 for common rotation with the first rotating part R 1. The bearing rotating part BR is connected by the joint BC 2 to the second rotating part R 2 for common rotation with the second rotating part R 2. The stationary bearing part BS is fixedly arranged on the stationary part S 0 and connected to the stationary part S 0 by means of the connection BC 0. The connections BC 0, BC 1 and BC 2 are each screw connections which are arranged axially, in particular parallel to the system axis AR, with respect to the system axis AR.The first rotating part R 1 has a step in the area of the connection of the first rotating part R 1 to the rotating bearing part BR. The rotating bearing part BR has a depression corresponding to the shoulder of the first rotating part R 1 in the region of the connection of the first rotating part R 1 to the rotating bearing part BR. The shoulder of the first rotating part R 1 and the corresponding depression of the rotating bearing part BR together form a centering device CR 1 for centering the first rotating part R 1 relative to the rotating bearing part BR.The second rotating part R 2 has a step in the area of the connection of the second rotating part R 2 to the rotating bearing part BR. The rotating bearing part BR has a depression corresponding to the shoulder of the second rotating part R 2 in the region of the connection of the second rotating part R 2 to the rotating bearing part BR. The shoulder of the second rotating part R 2 and the corresponding recess of the rotating bearing part BR together form a centering device CR 2 for centering the second rotating part R 2 relative to the rotating bearing part BR.FIG. 3 shows a schematic illustration of a gantry 20 of a computed tomography apparatus 2, wherein the first rotating part R 1 is connected to a crane apparatus TR 1. By means of the crane device TR 1, the first rotating part R 1 of the gantry 20 can be removed from the stationary part S 0 in the direction of the arrow parallel to the system axis AR. This typically requires one or more of the following measures:removing the patient support device 10 from the gantry 20,dismantling cladding parts and holders SC of the cladding parts,disassembling components disposed on the first rotating part R 1.For maintenance of the bearing assembly BG, typically further disassembly of the second rotating part R 2 and / or components arranged on the stationary part S 0 is required. After the maintenance of the bearing assembly BG, the disassembled components are reassembled and / or adjusted and the patient support apparatus 10 is adjusted relative to the gantry 20.FIGS. 4 and 5 each show a schematic illustration of the arrangement 1 according to a first embodiment of the invention. FIGS. 6 and 7 each show a schematic illustration of the arrangement 1 according to a second embodiment of the invention. In FIGS. 4 to 7, the first rotating part R 1 and the stationary part S 0 are connected to each other by the holding device 3 such that the first rotating part R 1 is disposed in the holding position relative to the stationary part S 0 independently of the bearing assembly BG. In the holding position, a central opening OR 1 of the first rotating part R 1 and a central opening OS 0 of the stationary part S 0 are arranged around the system axis AR. According to the second embodiment of the invention, the holding device 3 has an axial part of the holding device 3 with a plurality of holding elements in the form of screws FA 1 which are arranged axially, in particular parallel, to the system axis AR with respect to the system axis AR, and a radial part of the holding device 3 with a plurality of holding elements in the form of screws FR 1 which are arranged radially, in particular perpendicular, to the system axis AR with respect to the system axis AR. The orientation of the screw FA 1, FR 1 can be defined in particular by means of the axis AF of the screw FA 1, FR 1 about which the screw FA 1, FR 1 rotates during a screwing movement.The first rotating part R 1 is fixed to the stationary part S 0 by the axially arranged bolts FA 1 and the radially arranged bolts FR 1. The first rotating part R 1 has a rotor-side connecting device with a plurality of connecting elements in the form of threads for the screws FA 1 and with a plurality of connecting elements in the form of bearing surfaces for the screws FR 1. The support surfaces are formed by a surface of the first rotating part R 1 facing the stationary part S 0. Optionally, the support surfaces can be reinforced and / or marked, for example. Alternatively and / or in addition to the connecting elements in the form of bearing surfaces for the screws FR 1, the rotor-side connecting device can have a plurality of connecting elements in the form of threads for the screws FR 1. The stationary part S 0 has a stator-side connecting device with a plurality of connecting elements in the form of threads. The connecting elements are each designed to correspond to the holding elements.In the embodiments of the invention illustrated in FIGS. 4 to 7, it is provided that each of the screws FA 1 is connected in each case to at least one thread of the rotor-side connecting device and to at least one thread of the stator-side connecting device, and that each of the screws FR 1 is connected in each case to at least one bearing surface of the rotor-side connecting device and to at least one thread of the stator-side connecting device. In an operating state of the arrangement 1, in which a connecting element is not connected to a holding element, the connecting element can be at least partially covered, for example, by means of a closure cap. Alternatively and / or in addition to screws, bolts, in particular threaded bolts, can be used, for example. Alternatively and / or in addition to threads, depressions and / or bearing surfaces can be used, for example. In FIGS. 4 to 7, the arrangement 1 is each shown in a second operating state, wherein in the second operating state of the arrangement 1 the second rotating part R 2 is arranged on the bearing assembly BG for common rotation with the first rotating part R 1 such that the bearing assembly BG is located between the first rotating part R 1 and the second rotating part R 2 with respect to a direction parallel to the system axis AR. FIG. 8 shows a schematic illustration of the arrangement 1 according to the first embodiment of the invention in a first operating state, wherein the arrangement 1 has a carrying device TBG, for example a gantry crane, for carrying the storage assembly BG. The connection BC 1 of the bearing assembly BG to the first rotating part R 1, the connection BC 2 of the bearing assembly BG to the second rotating part R 2, the connection BC 0 of the bearing assembly BG to the stationary part S 0 is released. The second rotating part R 2 is removed from the bearing assembly BG and from the first rotating part R 1 in such a way that the bearing assembly BG and the intermediate space G 01 are exposed on a side facing away from the first rotating part R 1 with respect to a direction parallel to the system axis AR, in particular are exposed in such a way that the bearing assembly can be accommodated in the intermediate space parallel to the system axis and / or can be removed from the intermediate space parallel to the system axis. The connection of the bearing assembly BG to the support device TBG for supporting the bearing assembly BG is established. The bearing assembly BG can be accommodated by means of the support device TBG parallel to the system axis AR in an intermediate space G 01 which is formed between the first rotating part R 1 and the stationary part S 0 for accommodating the bearing assembly BG, and / or can be removed from the intermediate space G 01 parallel to the system axis AR.FIG. 9 shows a schematic illustration of a holding element of a holding device 3 of an arrangement 1 according to a third embodiment of the invention, wherein the holding device 3 has a holding element which has a combination of a screw FA 1, FR 1 and a threaded sleeve TS. The threaded sleeve TS has an external thread. A washer W 1 is arranged between the screw head of the screw FA 1, FR 1 and the threaded sleeve TS. The holding member is fixed relative to the first rotating part R 1 with a lock nut N 1. Between the lock nut N 1 and the first rotating part R 1, a washer W 2 is disposed.The holding element is connected to a connecting element of a rotor-side connecting device in the form of a thread T 1 and to a connecting element of a stator-side connecting device in the form of a thread T 0. The thread T 0 can be formed, for example, by a threaded insert, in particular by a self-tapping threaded insert, and / or by a weld nut welded to the stationary part S 0. Alternatively and / or additionally, the thread T 0 can be cut directly into the stationary part S 0. The thread T 1 can be formed, for example, by a threaded insert, in particular by a self-tapping threaded insert, and / or by a weld nut welded to the first rotating part R 1. Alternatively and / or additionally, the thread T 1 can be cut directly into the first rotating part R 1. An example of a self-tapping threaded insert is Ensat®.The connection shown in FIG. 9 forms a spacer and / or a tolerance compensation for a distance between the first rotating part R 1 and the stationary part S 0. In particular, if a screw FA 1 arranged parallel to the system axis AR is involved in FIG. 9, the connection illustrated in FIG. 9 forms a spacer and / or a tolerance compensation for a distance along the system axis AR between the first rotating part R 1 and the stationary part S 0.FIGS. 10 and 11 each show a schematic representation of the arrangement 1 according to a fourth embodiment of the invention, wherein the holding device 3 has a plurality of holding elements in the form of threaded bolts F 5, which can act like adjusting feet. The rotor-side connecting device has connecting elements in the form of threads which correspond to the threaded bolts F 5. The stator-side connecting device has in each case connecting elements in the form of bearing surfaces for the threaded bolts F 5. The support surfaces are formed by a surface of the stationary part S 0 facing the first rotating part R 1.Optionally, the support surfaces can be reinforced and / or marked, for example. For the maintenance of the component of the gantry 20, in particular of the bearing assembly BG, the threads can be equipped with the threaded bolts F 5 and thus the first rotating part R 1 can be arranged in the holding position independently of the bearing assembly BG relative to the stationary part S 0.FIGS. 12 and 13 each show a schematic representation of the arrangement 1 according to a fifth embodiment of the invention, wherein the holding device 3 has a holding element in the form of a jack F 6, in particular a scissor jack. The jack F 6 may be installed in the gantry 20 between the first rotating part R 1 and the stationary part S 0, for example, and / or may be inserted through an opening between the first rotating part R 1 and the stationary part S 0. If necessary, the jack F6 may be moved to the first rotating part R1 by means of a jack driving device. The jack drive device can be connected to the jack F 6, for example, by means of a drive shaft for transmitting a drive torque. The jack drive apparatus may be disposed within and / or outside the gantry 20 and / or may be manually and / or powered by a motor.FIGS. 14 and 15 each show a schematic representation of the arrangement 1 according to a sixth embodiment of the invention, wherein the holding device 3 has a plurality of holding elements each in the form of an air cushion F 7. The air cushion F 7 can be installed, for example, in the gantry 20 between the first rotating part R 1 and the stationary part S 0 and / or can be introduced through an opening between the first rotating part R 1 and the stationary part S 0. If necessary, the air bag F7 can be moved to the first rotating part R1 by means of an air bag ventilation device. The air cushion ventilation device can be connected to the air cushion F 7 for example by means of a compressed air line for transmitting compressed air. The air cushion ventilation device can be arranged inside and / or outside the gantry 20 and / or can be operated by means of a hand pump and / or by means of a motor pump and / or by means of a compressed air supply unit.FIG. 16 shows a schematic illustration of the arrangement 1 according to a seventh embodiment of the invention, wherein the holding device 3 has a plurality of, in particular two, holding elements in each case in the form of an eccentric device F 8. The eccentric device F 8 includes an eccentric pin and a shaft for positioning the eccentric pin, the eccentric pin being disposed on the shaft. In particular, the eccentric bolt is arranged on the shaft eccentrically with respect to a shaft axis of the shaft. The stator-side connecting device has connecting elements each in the form of a holder for the eccentric device F 8. The rotor-side connecting device has connecting elements in the form of bearing surfaces for the eccentric bolts. The support surfaces are formed by a surface of the first rotating part R 1 facing the stationary part S 0. Optionally, the support surfaces can be reinforced and / or marked, for example. If necessary, the eccentric pin can be moved by means of an eccentric device drive unit to the first rotating part R 1. The eccentric device drive unit can be connected to the shaft of the eccentric device F 8, for example, by means of a drive shaft for transmitting a drive torque. The eccentric device drive unit can be arranged inside and / or outside the gantry 20 and / or can be driven manually and / or by means of a motor.In particular, if the friction and / or the contact pressure between the eccentric bolts on the one hand and the rotor-side connecting elements on the other hand is sufficiently high, a rotational movement of the first rotating part R 1 relative to the stationary part S 0 about the system axis AR can also be prevented by means of the eccentric devices. The eccentric devices are arranged in such a way that the weight force of the first rotating part R 1 can be absorbed by means of the eccentric bolts. The two eccentric devices are arranged symmetrically with respect to a vertical plane in which the system axis AR is located. Optionally, the holding device 3 can have, in addition to the plurality of eccentric devices, an axial part of the holding device 3, for example with a plurality of holding elements in the form of screws which are arranged axially with respect to the system axis AR, in particular parallel to the system axis AR. By means of the axial part of the holding device 3, tilting movement of the first rotating part R 1 about a horizontal axis perpendicular to the system axis AR can be prevented, in particular when the connection BC 1 of the bearing assembly BG to the first rotating part R 1 is released.In particular, if an extension of the eccentric pins along the system axis AR is sufficiently large, a tilting movement of the first rotating part R 1 about a horizontal axis perpendicular to the system axis AR can be prevented by means of the eccentric device F 8, in particular if the connection BC 1 of the bearing assembly BG to the first rotating part R 1 is released.FIG. 17 shows a schematic representation of the arrangement 1 according to an eighth embodiment of the invention, wherein the holding device 3 has a plurality of, in particular two, holding elements each in the form of a wedge device F 9. The wedge device F 9 has a wedge and a spindle, in particular a threaded spindle, for positioning the wedge, wherein the wedge is arranged on the spindle. The stator-side connecting device has connecting elements each in the form of a holder for the wedge device F 9. The rotor-side connecting device has connecting elements in the form of bearing surfaces for the wedges. The support surfaces are formed by a surface of the first rotating part R 1 facing the stationary part S 0. Optionally, the support surfaces can be reinforced and / or marked, for example. If necessary, the wedge can be moved to the first rotating part R 1 by means of a wedge device drive unit. The wedge device drive unit can be connected to the spindle of the wedge device F 9, for example, by means of a drive shaft for transmitting a drive torque. The wedge device drive unit can be arranged inside and / or outside the gantry 20 and / or can be driven manually and / or by means of a motor.In particular, if the friction and / or the contact pressure between the wedges on the one hand and the rotor-side connecting elements on the other hand is sufficiently strong, a rotational movement of the first rotating part R 1 relative to the stationary part S 0 about the system axis AR can also be prevented by means of the wedge devices.The wedge devices are arranged such that the weight force of the first rotating part R 1 can be absorbed by means of the wedges. The two wedge devices are arranged symmetrically with respect to a vertical plane in which the system axis AR is located.Optionally, the holding device 3 can have, in addition to the plurality of wedge devices, an axial part of the holding device 3, for example with a plurality of holding elements in the form of screws FA 1 which are arranged axially with respect to the system axis AR, in particular parallel to the system axis AR. By means of the axial part of the holding device 3, tilting movement of the first rotating part R 1 about a horizontal axis perpendicular to the system axis AR can be prevented, in particular when the connection BC 1 of the bearing assembly BG to the first rotating part R 1 is released. In particular, if an extension of the wedges along the system axis AR is sufficiently large, a tilting movement of the first rotating part R 1 about a horizontal axis perpendicular to the system axis AR can be prevented by means of the wedge device F 9, in particular if the connection BC 1 of the bearing assembly BG to the first rotating part R 1 is released.Optionally, the arrangement may further comprise at least one component selected from the group consisting of the jack driving device, the air cushion ventilating device, the eccentric device driving unit, the wedge device driving unit, the driving shaft for transmitting a driving torque, and a compressed air line for transmitting compressed air.FIGS. 4 to 17 each show an operating state of the arrangement 1 according to the respective embodiment of the invention, in which the holding device 3 is located within a region defined by the outer periphery of the gantry 20. FIGS. 18 to 21 each show an operating state of the arrangement 1 according to the respective embodiment of the invention, in which the holding device 3 is located outside or partially outside the region defined by the outer periphery of the gantry 20.FIG. 18 shows a schematic illustration of the arrangement 1 according to a ninth embodiment of the invention, wherein the holding device 3 has a plurality of holding elements in each case in the form of a holding segment F 10. The holding device 3 further comprises screw devices for connecting the holding segments to the first rotating part R 1 and for connecting the holding segments to the stationary part S 0. The stator-side connecting device has connecting elements each in the form of a combination of a bearing surface for the holding segments and threads for the screw devices. The rotor-side connecting device has connecting elements each in the form of a combination of a bearing surface for the holding segments and threads for the screw devices.FIGS. 19 and 20 each show a schematic illustration of the arrangement 1 according to a tenth embodiment of the invention, wherein the holding device 3 has a holding element in the form of the holding frame F 11. FIG. 21 shows a schematic illustration of the arrangement 1 according to an eleventh embodiment of the invention, wherein the holding device 3 has a holding element in the form of the holding frame F 12. According to each of the tenth embodiment of the invention and the eleventh embodiment of the invention, the holder 3 further includes screwing devices FCR for connecting the holder frame F 11, F 12 to the first rotating part R 1, and screwing devices FCT and FCS for connecting the holder frame F 11, F 12 to the stationary part S 0. The stator-side connecting device has connecting elements each in the form of a combination of a bearing surface for the holding frame F 11, F 12 and threads for the screw devices. The rotor-side connecting device has connecting elements each in the form of a combination of a bearing surface for the holding frame F 11, F 12 and threads for the screw devices.Both according to the tenth embodiment of the invention and according to the eleventh embodiment of the invention, it is provided that the holding frame F 11, F 12 is connectable and / or connected to the first rotating part R 1 by means of the connection FCR and that the holding frame F 11, F 12 is connectable and / or connected to the stationary part S 0, in particular to the tilting frame 22, by means of the connection FCT. According to the eleventh embodiment of the invention, it is provided that the holding frame F 12 is connectable and / or connected to the stationary part S 0, in particular to the supporting frame 21, by means of the connection FCS. Optionally, the holding frame F 11, F 12 can have a section FB, by means of which the holding frame F 11, F 12 can be supported on a base. The support can be, for example, a floor and / or a floor plate of the medical examination room. On the support, for example, the supporting frame 21 can be arranged fixed relative to the support.FIG. 22 shows a schematic representation of the arrangement 1 according to a twelfth embodiment of the invention, wherein the arrangement 1 comprises the computed tomography device 2. The computed tomography apparatus 2 has the gantry 20, the tunnel-shaped opening 9, the patient support device 10 and the control device 30. The gantry 20 includes the stationary part S 0 and the rotor 24. The stationary part S 0 includes the support frame 21 and the tilting frame 22. The rotor 24 includes the first rotating part R 1 and the second rotating part R 2.The first rotating part R 1 is disposed on the stationary part S 0 in the storage position by the bearing assembly BG and is rotatable about the system axis AR by the bearing assembly BG. The patient 13 can be introduced into the tunnel-shaped opening 9. The acquisition region 4 is located in the tunnel-shaped opening 9, and a region of the patient 13 to be imaged can be positioned in the acquisition region 4 in such a way that the radiation 27 can pass from the radiation source 26 to the region to be imaged and, after interaction with the region to be imaged, can pass to the radiation detector 28. The patient support device 10 includes the support table 11 and the transfer plate 12 for supporting the patient 13. The transfer plate 12 is arranged on the support table 11 such that it can be moved relative to the support table 11 in such a way that the longitudinal direction of the transfer plate 12 is parallel or substantially parallel to the system axis AR and that the transfer plate 12 can be introduced into the acquisition region 4 parallel or substantially parallel to the system axis AR. The support frame 21 is fixedly arranged relative to the patient support device 10. The first rotating part R 1 is located between the bearing assembly BG and the bearing table 11 with respect to a direction parallel to the system axis AR. The second rotating part R 2 is located in a spatial region facing away from the bearing table 11 with respect to a vertical plane in which the tilting axis AT is located.The computed tomography device 2 is designed for the acquisition of imaging data based on electromagnetic radiation 27. The computed tomography device 2 has an imaging data acquisition unit. The imaging data acquisition unit is a projection data acquisition unit with the radiation source 26, e.g. an X-ray source, and the detector 28, e.g. an X-ray detector, in particular an energy-resolving X-ray detector. The radiation source 26 is arranged on the first rotating part R 1 and is configured to emit radiation 27, e.g. an X-ray radiation, with radiation quanta 27. The detector 28 is arranged on the first rotating part R 1 and is configured for detecting the radiation quanta 27. The radiation quanta 27 can pass from the radiation source 26 to the region of the patient 13 to be imaged and, after interaction with the region to be imaged, can strike the detector 28. In this way, imaging data of the region to be imaged can be acquired in the form of projection data by means of the imaging data acquisition unit.The control device 30 is configured to receive the imaging data acquired by the imaging data acquisition unit. The control device 30 has a computer 30 and is designed to control the computed tomography device 2. The computer 30 includes a storage device 31 and a processor system. The control device 30 has the image reconstruction device 34. A medical image data set can be reconstructed by means of the image reconstruction device 34 on the basis of the imaging data. The computed tomography apparatus 2 has an input device 38 and an output device 39, which are each connected to the control device 30. The input device 38 is designed to input control information, e.g. image reconstruction parameters and / or examination parameters. The output device 39 is designed in particular for outputting control information, images and / or tones.FIG. 23 shows a flow diagram of a method for maintaining a component of a gantry 20 of a computed tomography device 2 according to a latest embodiment of the invention.According to the fourth embodiment of the invention, it is provided that the first rotating part R 1 of the gantry 20 and the stationary part S 0 of the gantry 20 can be connected to one another by means of a bearing assembly BG in such a way that the first rotating part R 1 is arranged in a storage position relative to the stationary part S 0 and is mounted rotatably about a system axis AR by means of the bearing assembly BG, and that the method comprises the following steps:connecting CRS of the first rotating part R 1 and the stationary part S 0 by means of a holding device 3 in such a way that the first rotating part R 1 is arranged in a holding position relative to the stationary part S 0 independently of the bearing assembly BG, wherein in the holding position a central opening OR 1 of the first rotating part R 1 and a central opening OS 0 of the stationary part S 0 are arranged about the system axis AR,Wait MC of the component of the gantry 20.

Claims

Arrangement (1), having - a stationary part (S0) of a gantry (20) of a computed tomography device (2) and a first rotating part (R1) of the gantry (20) of the computed tomography device (2), - wherein the first rotating part (R1) and the stationary part (S0) can be connected to one another by means of a bearing assembly (BG) in such a way that the first rotating part (R1) is arranged in a storage position relative to the stationary part (S0) and is mounted rotatably about a system axis (AR) by means of the bearing assembly (BG), - wherein the first rotating part (R1) and the stationary part (S0) can be connected to one another by means of a holding device (3) in such a way, the first rotating part (R1) being arranged in a holding position relative to the stationary part (S0) independently of the bearing assembly (BG), - wherein, in both the storage position and the holding position, a central opening (OR1) of the first rotating part (R1) and a central opening (OS0) of the stationary part (S0) are arranged around the system axis (AR), - wherein, in a first operating state of the arrangement (1), the first rotating part (R1) and the stationary part (S0) are connected to one another by means of the holding device (3) in such a way that the first rotating part (R1) is arranged in the holding position relative to the stationary part (S0) independently of the bearing assembly (BG), wherein, in the first operating state of the arrangement (1), a connection of the bearing assembly (BG) to the first rotating part (R1) and a connection of the bearing assembly (BG) to the stationary part (S0) can be released, - wherein, in the first operating state of the arrangement (1), the bearing assembly (BG) can be removed parallel to the system axis (AR) from a space (G01) which is formed between the first rotating part (R1) and the stationary part (S0) for receiving the bearing assembly (BG).Arrangement (1) according to claim 1, - wherein the holding position and the storage position are coaxial with respect to the system axis (AR) and / or - wherein the holding position and the storage position coincide with respect to the position along the system axis (AR).Arrangement (1) according to claim 1 or 2, - wherein the holding position and the storage position are identical.Arrangement (1) according to one of Claims 1 to 3, - wherein, in the first operating state of the arrangement (1), a connection of the bearing assembly (BG) to a supporting device (TBG) for supporting the bearing assembly (BG) can be produced and / or released.The assembly (1) of any one of claims 1 to 4, further comprising at least one device selected from the group consisting of the bearing assembly (BG), the support device (3), the support device (TBG), the gantry (20), the computed tomography apparatus (2), and combinations thereof.Arrangement (1) according to one of Claims 1 to 5, - wherein the stationary part (S0) has a tilting frame (22) of the gantry (20) and / or a supporting frame (21) of the gantry (20), and / or - wherein the tilting frame (22) is mounted such that it can be tilted about a tilting axis (AT) relative to the supporting frame (21).Arrangement (1) according to one of Claims 1 to 6, - wherein the first rotating part (R1) is designed to accommodate a radiation source (26) and / or a radiation detector (28).Arrangement (1) according to one of Claims 1 to 7, further comprising a second rotating part (R2) of the gantry (20), - wherein, in a second operating state of the arrangement (1), the second rotating part (R2) is arranged on the bearing assembly (BG) and / or on the first rotating part (R1) for common rotation with the first rotating part (R1) in such a way that the bearing assembly (BG) is located between the first rotating part (R1) and the second rotating part (R2) with respect to a direction parallel to the system axis (AR), - wherein, in the first operating state of the arrangement (1), the second rotating part (R2) is removed from the bearing assembly (BG) and / or from the first rotating part (R1), exposing the bearing assembly (BG) and / or the clearance (G 01) on a side opposite to the first rotating part (R 1) with respect to the direction parallel to the system axis (AR).Arrangement (1) according to Claim 8, wherein the second rotating part (R2) is designed to: - accommodate a rotor-side data transmission unit of a data transmission device designed for data transmission between the second rotating part (R2) and the stationary part (S0), and / or - accommodate a rotor-side power transmission unit of a power transmission device designed for power transmission between the second rotating part (R2) and the stationary part (S0).Arrangement (1) according to one of claims 1 to 9, wherein the holding device (3) is configured for a releasable and / or positive connection to the first rotating part (R1) and / or for a releasable and / or positive connection to the stationary part (S0).Arrangement (1) according to one of Claims 1 to 10, - wherein the first rotating part (R1) has at least one rotor-side connecting device which is designed for a releasable and / or positive-locking connection to the holding device (3), and / or - wherein the stationary part (S0) has at least one stator-side connecting device which is designed for a releasable and / or positive-locking connection to the holding device (3).Arrangement (1) according to one of Claims 1 to 11, - wherein the holding device (3) has an axial part of the holding device (3), - wherein the first rotating part (R1) and the stationary part (S0) can be connected to one another by means of the axial part of the holding device (3) in such a way that the first rotating part (R1) is arranged in the holding position relative to the stationary part (S0) independently of the bearing assembly (BG) with respect to the position along the system axis (AR).Arrangement (1) according to one of claims 1 to 12, - wherein the holding device (3) has a radial part of the holding device (3), - wherein the first rotating part (R1) and the stationary part (S0) are connectable to one another by means of the radial part of the holding device (3) in such a way that the first rotating part (R1) is arranged in the holding position relative to the stationary part (S0) independently of the bearing assembly (BG) with respect to the position along a direction perpendicular to the system axis (AR).Arrangement (1) according to one of claims 1 to 13, - wherein the holding device (3) has a holding element selected from the holding element group or a plurality of holding elements each selected from the holding element group, - wherein the holding element group consists of a screw (FA1, FR1), a threaded sleeve (TS), a spacer sleeve, a bolt, a threaded bolt (F5), a leg, a screw device, a support device, a lifting device, a jack (F6), an air cushion (F7), an eccentric device (F8), a wedge device (F9), a holding segment (F10), a holding frame (F11, F12) and combinations thereof.Method for maintaining a component of a gantry (20) of a computed tomography device (2), wherein a first rotating part (R1) of the gantry (20) and a stationary part (S0) of the gantry (20) can be connected to one another by means of a bearing assembly (BG) in such a way that the first rotating part (R1) is arranged in a storage position relative to the stationary part (S0) and is rotatably mounted about a system axis (AR) by means of the bearing assembly (BG), wherein the method comprises the following steps: - connecting (CRS) the first rotating part (R1) and the stationary part (S0) by means of a holding device (3) in such a way that, the first rotating part (R1) being arranged in a holding position relative to the stationary part (S0) independently of the bearing assembly (BG), - wherein in the holding position a central opening (OR1) of the first rotating part (R1) and a central opening (OS0) of the stationary part (S0) are arranged around the system axis (AR), - waiting (MC) the component of the gantry (20), wherein a connection of the bearing assembly (BG) to the first rotating part (R1) and a connection of the bearing assembly (BG) to the stationary part (S0) are released, wherein the bearing assembly (BG) is separated from a space (G01) parallel to the system axis (AR), which is formed between the first rotating part (R 1) and the stationary part (S 0) for accommodating the bearing assembly (BG).Method according to claim 15, - wherein the maintenance of the component of the gantry (20) comprises a repair of the component of the gantry (20) and / or a replacement of the component of the gantry (20).Method according to one of Claims 15 to 16, - wherein a connection of the bearing assembly (BG) to a support device (TBG) for supporting the bearing assembly (BG) is produced and / or released.Method according to one of claims 15 to 17, - wherein a second rotating part (R2) is removed from the bearing assembly (BG) and / or from the first rotating part in such a way that the bearing assembly (BG) and / or the intermediate space (G01) is exposed on a side facing away from the first rotating part (R1) with respect to a direction parallel to the system axis (AR), and / or - wherein the second rotating part (R2) is arranged on the bearing assembly (BG) and / or on the first rotating part for a common rotation with the first rotating part (R1).The method according to any one of claims 15 to 18, - wherein the component of the gantry (20) is the bearing assembly (BG), and / or - wherein the component of the gantry (20) is disposed on at least one device selected from the group consisting of the first rotating part (R1), the stationary part (S0), and combinations thereof.Method according to claim 18, - wherein the second rotating part (R2) is arranged on the bearing assembly (BG) and / or on the first rotating part (R1) for common rotation with the first rotating part (R1), - wherein the component of the gantry (20) is the second rotating part (R2) and / or is arranged on the second rotating part (R2).Method according to one of Claims 15 to 20, which is carried out with an arrangement (1) according to one of Claims 1 to 14.

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