Covering part for a gantry of a computer tomography device

Abstract

Covering part (V1) for a gantry (20) of a computer tomography device (1), - wherein the covering part (V1) has a ring disc shaped part (V0) and a cylinder jacket shaped part (V9), - wherein the annular disc molded part (V0) and the cylinder jacket molded part (V9) are arranged coaxially to a system axis (1A) such that an inner circumference of the annular disc molded part (V0) is attached to a base of the cylinder jacket molded part (V9), - wherein the annular disc molded part (V0) has a first wall region (V31) and a second wall region (V32) which are opposite one another with respect to the system axis (1A), adjoin the inner circumference of the annular disc molded part (V0) and extend flatly substantially perpendicular to the system axis (1A), - wherein the annular disc molded part (V0) has a stiffening structure (6) which extends flat away from the cylinder jacket molded part (V9) essentially parallel to the system axis (1A) such that the first wall region (V31) and the second wall region (V32) are located between the stiffening structure (6) and the cylinder jacket molded part (V9) with respect to the system axis (1A).

Description

The invention relates to a covering part for a gantry of a computed tomography device. The invention further relates to a gantry and a computed tomography device.Covering parts of a gantry of a computed tomography device should on the one hand have a low weight and a low installation space requirement, and on the other hand should be as stable as possible, in particular in order to maintain predefined safety distances from rotating components of the gantry even under load.The invention has the object of providing an alternative to conventional gantry cladding parts in computed tomography apparatuses, in particular with regard to the aforementioned requirements. The independent claims relate to solutions to this task. The dependent claims relate to particular embodiments of these solutions. Regardless of the grammatical sex of a certain term, individuals with male, female or other sex identity are included.The invention relates to a covering part for a gantry of a computed tomography device,wherein the cladding part has an annular disc shaped part and a cylinder jacket shaped part,wherein the ring-disk molded part and the cylinder jacket molded part are arranged coaxially to a system axis such that an inner periphery of the ring-disk molded part is joined to a base of the cylinder jacket molded part,wherein the ring-disk molded part has a first wall region and a second wall region which are opposite one another with respect to the system axis, adjoin the inner periphery of the ring-disk molded part and extend flat essentially perpendicularly to the system axis,wherein the ring-disc shaped part has a stiffening structure which extends in a planar manner away from the cylinder shell shaped part substantially parallel to the system axis in such a way that the first wall region and the second wall region are situated between the stiffening structure and the cylinder shell shaped part with respect to the system axis.The inner periphery of the shaped ring disc part and the base of the shaped cylinder jacket part can be adhesively bonded to one another, for example. The wall thickness of the shaped annular disc part and / or of the shaped cylindrical jacket part can be, for example, less than 30 mm, in particular less than 20 mm. In particular, it can be provided that the first wall region, the second wall region and the stiffening structure merge integrally into one another.The stiffening structure brings about increased stiffness of the trim part. A safety distance between the shaped part of the ring disk and a trajectory of rotating components of the gantry can thus be reduced. In a head computed tomography device, a patient can thus be brought closer to the scanning plane and the scanning depth can thus be increased. A high scanning depth allows more scanning from the head and neck region of the patient, thereby increasing the possible examination region.The scan depth can be increased by bringing the cladding part closer to the beam geometry. In this case, a safety distance can be maintained between the rotating part of the gantry, in which the beam geometry is located, and the cladding part, so that the cladding part cannot be pressed into the rotating parts of the gantry by loads occurring during the clinical workflow.Due to the increased rigidity, the amount of material and thus the total weight of the trim part can be reduced, for example, to such an extent that a person can manually remove the trim part for maintenance purposes.One embodiment provides that the stiffening structure has a first substructure, wherein the first substructure extends in a planar manner in a first stiffening plane which is substantially parallel to the system axis. In particular, it can be provided that the first substructure adjoins the inner periphery of the shaped ring disc part and / or that the first stiffening plane runs substantially tangentially to a lateral surface of the shaped cylinder surface part.One embodiment provides that the stiffening structure has a second substructure, wherein the second substructure extends in a planar manner in a second stiffening plane which is parallel to the first stiffening plane, wherein the first wall region and the second wall region are situated between the first stiffening plane and the second stiffening plane with respect to a direction which is perpendicular to the system axis.One embodiment provides that the ring disk molding and / or the cylinder jacket molding is produced from a fiber-reinforced composite material, in particular a carbon fiber-reinforced composite material.The molded parts can be produced, for example, by an autoclave process and / or a deep-drawing process. Cladding parts with a high rigidity can be produced from fiber composites, so that the safety distance from the trajectory of the rotating components can be reduced and thus the cladding part can be moved closer to the beam geometry. The scanning depth can thus be increased. Furthermore, the use of fiber composites can greatly reduce the wall thickness of the trim part. As a result, the cover can be brought even closer to the beam geometry, which brings about a further increase in the scanning depth.The invention further relates to a gantry for a computed tomography apparatus, wherein the gantry has a cladding for delimiting an inner region of the gantry from a surrounding area of the gantry, wherein the cladding has the cladding part according to the invention, wherein the gantry has an opening, wherein an examination object can be introduced into the opening along the system axis, wherein the shaped cylinder jacket part delimits the inner region of the gantry from the opening.One embodiment provides that a radiation protection material lies flat against a side of the shaped ring disk part facing the inner region of the gantry. The radiation protection material can be designed, for example, in the form of a film, in particular a lead film, and / or follow a step-shaped course of the cladding part. The radiation protection material can protect the environment of the gantry, in which for example an operator or a patient can be located, from scattered radiation. The relatively high weight of the radiation protection material can be partially compensated by a relatively light weight of the cladding part.One embodiment provides that the gantry has a projection data acquisition system, wherein the projection data acquisition system is configured to acquire projection data of the examination object introduced into the opening, wherein a distance of the stiffening structure from the system axis, in particular a distance of the first stiffening plane and / or the second stiffening plane from the system axis, is smaller than a distance of the projection data acquisition system from the system axis.The examination object can be, in particular, a head of a patient. The shoulders of the patient may be, for example, wider than the opening. In particular, a form fit of the shoulders of the patient with the first wall region and the second wall region can counteract a further introduction of the head of the patient along the system axis into the opening in a form fit manner.The distance of the projection data acquisition system from the system axis can be, for example, a distance of an X-ray source of the projection data acquisition system and / or a distance of an X-ray detector of the projection data acquisition system from the system axis.An embodiment provides that the stiffening structure has a window such that an optical axis of an optical component of the computed tomography system can pass through the window when the optical component is located in the interior region of the gantry.The optical component can be, for example, a camera for observing the examination object and / or the patient and / or a laser unit for laser-based positioning of the examination object. In particular, it can be provided that the first wall region and the second wall region are located between the optical component and the cylinder shell molded part with respect to the system axis. In particular, it can be provided that the optical axis is substantially perpendicular to the system axis and / or that the first wall region and the second wall region are located between the optical axis and the cylinder shell molded part with respect to the system axis.One embodiment provides that the cladding part has a hat-shaped curvature toward the surroundings of the gantry, wherein the hat-shaped curvature widens toward the stiffening structure, in particular toward the first substructure of the stiffening structure, wherein a partial region of the inner region of the gantry is delimited from the surroundings of the gantry by the hat-shaped curvature and the stiffening structure, wherein a holder for fastening the optical component to the stiffening structure is located in the partial region of the inner region of the gantry.The invention further relates to a computed tomography device, in particular a mobile head computed tomography device, having a gantry according to the invention.An embodiment provides that the gantry has a first gantry part, a second gantry part and a third gantry part, wherein the first gantry part has a rotatably mounted rotor with a projection data acquisition system, wherein the third gantry part has at least one section of the opening, wherein the holding structure is connected to the third gantry part by means of the pivot device and is mounted such that it can be pivoted about the pivot axis relative to the third gantry part. The projection data acquisition system can have, for example, an X-ray source and an X-ray detector which interacts with the X-ray source.In this case, the first gantry part can be mounted movably relative to the second gantry part and relative to the third gantry part in such a way that a translatory movement of the first gantry part relative to the second gantry part and relative to the third gantry part can be carried out, while at the same time the second gantry part and the third gantry part are at rest relative to the examination object and the radiation protection device is at rest relative to the examination object and relative to the at least one section of the opening when the examination object is located in the opening.The examination object can be, for example, a body part of a patient, in particular a head of a patient. The computed tomography device can be designed in particular as a head computed tomography device and / or as a mobile computed tomography device. The patient can be, for example, a human, in particular a baby, or an animal. A longitudinal axis of the patient can be parallel, in particular identical, or skew, to the system axis, for example, or intersect the system axis. The object under examination can be, for example, an object, in particular a phantom for calibrating the computed tomography device.Within the scope of the invention, features which are described with reference to different embodiments of the invention and / or different claim categories (method, use, device, system, arrangement etc.) can be combined to form further embodiments of the invention. For example, a claim relating to a device can also be developed with features which are described or claimed in connection with a method, and vice versa. Functional features of a method can be carried out by correspondingly designed physical components. The use of the indefinite article "a" or "an" does not exclude that the feature concerned can also be present multiple times.Features of the invention are explained below on the basis of examples with reference to the attached figures. The illustration in the figures is schematic, greatly simplified and not necessarily true to scale.FIGS. 1 to 4 show a covering part for a gantry of a computed tomography device in various views.FIGS. 5 and 6 show a computed tomography device with a gantry.FIGS. 1 to 4 show the covering part V 1 for a gantry 20 of a computed tomography device 1 in different views,wherein the cladding part V1 has an annular disc shaped part V0 and a cylinder jacket shaped part V9,wherein the ring-disk molded part V 0 and the cylinder-jacket molded part V 9 are arranged coaxially with a system axis 1A such that an inner periphery of the ring-disk molded part V 0 is joined to a base of the cylinder-jacket molded part V 9,wherein the ring disk molding V0 has a first wall region V31 and a second wall region V32 which are opposite to one another with respect to the system axis 1A, adjoin the inner periphery of the ring disk molding V0 and extend flat essentially perpendicularly to the system axis 1A,wherein the ring-disk shaped part V0has a stiffening structure 6, which extends substantially parallel to the system axis 1A in a planar manner away from the cylinder shell shaped part V9such that the first wall region V31and the second wall region V32are located between the stiffening structure 6 and the cylinder shell shaped part V9with respect to the system axis 1A.Blocks 64 are fastened, in particular glued, to the outer periphery of the ring-disc shaped part V 0, to which another part V 2 of the cladding V can be joined in a form-fitting manner. By means of the blocks 64, the mechanical stresses which result from the connection of the cladding part V 1 to the further part V 2 of the cladding V can be distributed uniformly over the ring-disc shaped part. By means of the fastening means 65, 66, the cladding part V 1 can be fastened to the further part V 2 of the cladding. A holder 67 for a holding structure 7 of a radiation protection device 75 is also fastened to the cladding part V 1. A connecting element 63 for a connection, in particular a releasable electromagnetic connection, of the covering part V 1 to a holding column 32, on which the upper body bearing plate 15 and the head shell 19 are also arranged, is also fastened to the covering part V 1. The covering part V 1 together with the components 63, 64, 65, 66, 67 and 68 forms an integrated covering and holding structure 2 of the gantry 20.The example shown provides that the stiffening structure 6 has a first substructure 61, wherein the first substructure 61 extends in a planar manner in a first stiffening plane which is substantially parallel to the system axis 1A.The example shown provides that the stiffening structure 6 has a second substructure 62, wherein the second substructure 62 extends in a planar manner in a second stiffening plane which is parallel to the first stiffening plane, wherein the first wall region V 31 and the second wall region V 32 are situated between the first stiffening plane and the second stiffening plane with respect to a direction y which is perpendicular to the system axis 1A.The example shown provides that the ring disk molding V 0 and / or the cylinder jacket molding V 9 is produced from a fiber-reinforced composite material, in particular a carbon fiber-reinforced composite material.The partition wall V 3 includes the first wall portion V 31 and the second wall portion V 3. Loads can act on the partition wall V 3 as a result of a form fit of the shoulders of the patient with the first wall region V 31 and the second wall region V 32 during the insertion of the head of the patient into the opening. Similar loads can occur when an operator leans against the partition wall V 3. The stiffening structure 6 counteracts bending of the partition wall V 3 under such loads, so that the partition wall V 3 can be formed with thin walls and / or a small safety distance from the rotating components can be provided in order to increase the scanning depth.FIGS. 5 and 6 show the computed tomography apparatus 1 with the gantry 20 and a radiation protection device 75 for covering the opening 9. the example shown provides that the gantry 20 has a cladding V for delimiting an inner region 29 of the gantry 20 from an environment U of the gantry 20, wherein the cladding V has the cladding part V 1 according to the example shown, wherein the gantry 20 has an opening 9, wherein an object to be examined 14 can be introduced into the opening 9 along the system axis 1A, wherein the shaped cylinder jacket part V 9 delimits the inner region 29 of the gantry 20 from the opening 9.The example shown provides that a radiation protection material lies flat against a side of the shaped ring disk part V0 facing the inner region 29 of the gantry 20.The example shown provides that the gantry 20 has a projection data acquisition system 27, wherein the projection data acquisition system 27 is configured to acquire projection data of the examination object 14 inserted into the opening 9, wherein a distance of the stiffening structure 6 from the system axis 1A, in particular a distance of the first stiffening plane and / or the second stiffening plane from the system axis 1A, is smaller than a distance of the projection data acquisition system 27 from the system axis 1A.The example shown provides that the stiffening structure 6 has a window 60 such that an optical axis of an optical component of the computed tomography system 1 can pass through the window 60 when the optical component is located in the interior region of the gantry 20.The example shown provides that the cladding part V 1 has a hat-shaped curvature toward the environment U of the gantry 20, wherein the hat-shaped curvature widens toward the stiffening structure 6, in particular toward the first substructure 61 of the stiffening structure 6, wherein a partial region of the inner region of the gantry 20 is delimited from the environment U of the gantry 20 by the hat-shaped curvature and the stiffening structure 6, wherein a holder 68 for fastening the optical component to the stiffening structure 6 is located in the partial region of the inner region of the gantry 20.The examination object 14 is the head of the patient 13; the computed tomography device 1 is a mobile head computed tomography device. The computed tomography apparatus 1 further comprises a head shell 19 into which the head of the patient 13 can be accommodated, and an upper body support plate 15 on which the upper body of the patient 13 can be supported.The gantry 20 has a first gantry part 21, a second gantry part 22 and a third gantry part 23, wherein the first gantry part 21 has a rotatably mounted rotor 24 with a projection data acquisition system 27, wherein the third gantry part 23 has at least one section of the opening 9. The holding structure 7 is connected to the third gantry part 23 by means of the pivot device 70 and is mounted such that it can be pivoted about the pivot axis 7A relative to the third gantry part 23. The third gantry part 23 has the covering part V 1.The first gantry part 21 is movably mounted relative to the second gantry part 22 and relative to the third gantry part 23 in such a way that a translatory movement of the first gantry part 21 relative to the second gantry part 22 and the third gantry part 23 can be carried out, while at the same time the second gantry part 22 and the third gantry part 23 are stationary relative to the examination object 14 and the radiation protection device 75 is stationary relative to the examination object 14 and relative to the at least one section of the opening 9 when the examination object 14 is located in the opening 9.The first gantry part 21 has a pivot bearing 25 and a support structure 26, wherein the rotor 24 is connected to the support structure 26 by means of the pivot bearing 25 and is mounted rotatably about the system axis 1A relative to the support structure 26. The projection data acquisition system 27 has the X-ray source 4A for generating the X-ray radiation 4 and the X-ray detector 4B for detecting the X-ray radiation 4. The cylinder jacket molded part V 9 is located in the beam path of the x-ray radiation 4.FIG. 6 shows the computed tomography device 1 with the gantry 20. The gantry 20 has an inner region 29 and a cladding V for delimiting the inner region 29 from an environment U. The example shown provides that the upper region 5H of the radiation protection curtain 5 rests on the holding structure 7 in such a way that the upper region 5H of the radiation protection curtain 5 shields a region 8 of an environment U of the gantry 20 from stray radiation of an X-ray radiation 4 which, coming from the opening 9, is directed onto the region 8 of the environment U of the gantry 20 and penetrates the holding structure 7, in particular when the holding structure 7 is in the position of the holding structure 7 shown.The holding structure 7 extends flat in a cover plane 7E, wherein the cover plane 7E is substantially parallel to the pivot axis 7A. The system axis 1A is horizontal and parallel to the horizontal direction z. The pivot axis 7A is horizontal and perpendicular to the horizontal direction z. The pivot axis 7A is located above the opening 9. the radiation protection curtain 5 is arranged on the holding structure 7, in particular is fastened to the holding structure 7, wherein a lower region 5L of the radiation protection curtain 5 depends from the holding structure 7, wherein an upper region 5H of the radiation protection curtain 5 rests on the holding structure 7. The pivoting device 70 has the friction hinge 76. A first lateral part 51 of the radiation protection curtain 5 extends from the gantry 20 as far as a first edge 71 of the holding structure 7. Y 1 is the vertical position of the first edge 71 of the holding structure 7. With respect to the vertical direction y, a space is located between the patient 13 and the holding structure 7. The computed tomography device 1 further comprises an illumination system 81 which is configured to illuminate the opening 9.The computed tomography device 1 further comprises a camera 82, which is configured to optically capture the object to be examined 14 at least when the object to be examined 14 is located in the opening 9 and / or directly in front of the opening 9. The computed tomography device 1 further comprises a laser unit 83 for laser-based positioning of the examination object 14.

Claims

Cladding part (V1) for a gantry (20) of a computed tomography device (1), - wherein the cladding part (V1) has a ring-disc shaped part (V0) and a cylinder-jacket shaped part (V9), - wherein the ring-disc shaped part (V0) and the cylinder-jacket shaped part (V9) are arranged coaxially with respect to a system axis (1A) in such a way that an inner periphery of the ring-disc shaped part (V0) is joined to a base of the cylinder-jacket shaped part (V9), - wherein the ring-disc shaped part (V0) has a first wall region (V31) and a second wall region (V32), which are opposite one another with respect to the system axis (1A), Adjoining the inner periphery of the shaped annular disc part (V0) and extending flat essentially perpendicularly to the system axis (1A), - wherein the shaped annular disc part (V0) has a stiffening structure (6) which extends flat away from the shaped cylindrical surface part (V9) essentially parallel to the system axis (1A) in such a way that the first wall region (V31) and the second wall region (V32) are located between the stiffening structure (6) and the shaped cylindrical surface part (V9) with respect to the system axis (1A).Trim part (V1) according to Claim 1, - wherein the stiffening structure (6) has a first substructure (61), - wherein the first substructure (61) extends in a planar manner in a first stiffening plane which is substantially parallel to the system axis (1A).The trim part (V1) according to claim 2, - wherein the stiffening structure (6) has a second substructure (62), - wherein the second substructure (62) extends in a planar manner in a second stiffening plane which is parallel to the first stiffening plane, - wherein the first wall region (V31) and the second wall region (V32) are located between the first stiffening plane and the second stiffening plane with respect to a direction (y) which is perpendicular to the system axis (1A).Cladding part (V1) according to one of Claims 1 to 3, - wherein the annular disc moulding (V0) and / or the cylinder casing moulding (V9) is produced from a fibre-reinforced composite material, in particular a carbon fibre-reinforced composite material.Gantry (20) for a computed tomography apparatus (1), - wherein the gantry (20) has a cladding (V) for delimiting an inner region (29) of the gantry (20) from an environment (U) of the gantry (20), - wherein the cladding (V) has the cladding part (V1) according to one of Claims 1 to 4, - wherein the gantry (20) has an opening (9), wherein an examination object (14) can be introduced into the opening (9) along the system axis (1A), - wherein the shaped cylinder jacket part (V9) delimits the inner region (29) of the gantry (20) from the opening (9).Gantry (20) according to Claim 5, - wherein a radiation protection material lies flat against a side of the shaped annular disk part (V0) facing the inner region (29) of the gantry (20).Gantry (20) according to claim 5 or 6, - wherein the gantry (20) has a projection data acquisition system (27), - wherein the projection data acquisition system (27) is configured to acquire projection data of the examination object (14) introduced into the opening (9), - wherein a distance of the stiffening structure (6) from the system axis (1A), in particular a distance of the first stiffening plane and / or the second stiffening plane from the system axis (1A), is smaller than a distance of the projection data acquisition system (27) from the system axis (1A).Gantry (20) according to one of Claims 5 to 7, - wherein the stiffening structure (6) has a window (60) in such a way that an optical axis of an optical component of the computed tomography system (1) can pass through the window (60) when the optical component is located in the interior region of the gantry (20).Gantry (20) according to Claim 8, - wherein the cladding part (V1) has a hat-shaped curvature towards the environment (U) of the gantry (20), - wherein the hat-shaped curvature widens towards the stiffening structure (6), in particular towards the first substructure (61) of the stiffening structure (6), - wherein a partial region of the inner region of the gantry (20) is delimited from the environment (U) of the gantry (20) by the hat-shaped curvature and the stiffening structure (6), - wherein a holder (68) for fastening the optical component to the stiffening structure (6) is located in the partial region of the inner region of the gantry (20).Computed tomography device (1), in particular a mobile head computed tomography device, having a gantry (20) according to one of Claims 5 to 9.

Images