Frame for a computed tomography scanner

Abstract

Frame (100, 200) for a computed tomography scanner, wherein the frame (100, 200) has at least one receiving structure (110, 120, 130, 140, 150, 160) which is configured to attach a component (115, 205) of the computed tomography scanner, characterized in that the receiving structure (110, 120, 130, 140, 150, 160) is at least partially manufactured by additive manufacturing using a WAAM process or a SAAM process.

Description

[0001] The invention relates to a frame for a computed tomography scanner. The invention further relates to a gantry for a computed tomography scanner and a computed tomography scanner itself.

[0002] In computed tomography (CT), cross-sectional images of the patient are reconstructed from X-ray projections taken from a variety of angles. To acquire these projections, an X-ray source and an X-ray detector positioned opposite it rotate around a scan area. In spiral CT, the patient being examined is simultaneously moved on a table through the tunnel of a gantry.

[0003] All rotating components, especially the X-ray source and the X-ray detector, are mounted on a rotating frame in a computed tomography (CT) scanner. This rotating frame is rotatably mounted within the gantry of the CT scanner. Such a rotating frame is also referred to as a drum or rotating part of the gantry. The gantry typically also has a fixed support frame, or frame structure, to which cladding elements are attached. The rotating frame is rotatably mounted within this frame structure, for example, by means of a roller bearing or magnetic bearing.

[0004] To minimize radiation exposure for the patient and avoid motion artifacts, the aim is to achieve the highest possible rotational speed for the X-ray source and detector, for example, up to 240 rpm. Therefore, the rotating assembly must meet the highest standards of rigidity to prevent deformation even at high rotational speeds. Slight deformations of just a few tenths of a millimeter can result in severe image artifacts if the relative position of the X-ray source to the detector is not precisely constant.

[0005] In the prior art, the turntable is designed as an aluminum or steel casting, which is subsequently machined. During each examination, the turntable, along with the X-ray source and other rotating components, is accelerated as quickly as possible to the rotational speed required for the examination, in order to minimize the examination time and reduce patient discomfort. Therefore, it is advantageous to design the turntable and its attached components with the lowest possible rotating mass. A suitable casting for the turntable provides the necessary stiffness and a high section modulus under load, but due to the manufacturing method, it can only be produced with a certain (high) mass, as minimum wall thicknesses must be observed for manufacturing purposes.The higher the required rotational speed of the bogie, the more difficult it becomes to meet these requirements with existing manufacturing technology. Patent EP 4 265 188 B1 relates to a bogie for the gantry of a computed tomography scanner, which has scanning areas to which rotating components of the computed tomography scanner can be attached. The bogie is manufactured, at least in part, using additive manufacturing.

[0006] The invention aims to provide an alternative to conventional frames for a computed tomography scanner, which can in particular be manufactured with a reduced mass compared to conventional frames.

[0007] These and other problems, which will be mentioned in the following description or which may be recognized by a person skilled in the art, are solved by the subject matter of the independent claims. The dependent claims further develop the central idea of ​​the present invention in a particularly advantageous manner. Regardless of the grammatical gender of a particular term, persons of male, female, or other gender identities are included.

[0008] According to one aspect of the invention, a frame for a computed tomography scanner or a medical stand-alone device is proposed, wherein the frame has at least one mounting structure configured to attach a component of the computed tomography scanner. The mounting structure is at least partially manufactured by a wire arc additive manufacturing (WAAM) process or a submerged arc additive manufacturing (SAAM) process using additive manufacturing.

[0009] This document discloses, in particular, a method for manufacturing a frame according to the invention. Additive manufacturing, also known as 3D printing, refers in particular to manufacturing processes in which material is applied layer by layer to produce three-dimensional workpieces. This is typically done using computer-controlled processes with liquid or powdered materials according to a CAD design, so that any three-dimensional (3D) shape can be realized.

[0010] Wire Arc Additive Manufacturing (WAAM) is an additive manufacturing process in which metal components or structures are built up layer by layer using an electric arc. The starting material is typically a metal wire, which is melted by the arc and precisely deposited onto a base plate or an existing component. In this way, a three-dimensional workpiece is created layer by layer, with the individual layers being mechanically bonded together by the process. WAAM thus combines principles of arc welding with those of 3D printing. The process enables the production of large, complex structures significantly faster and more cost-effectively than many other metal 3D printing technologies. WAAM is particularly advantageous for large-format components or repairs to metal parts.After printing, excess material can be removed by CNC milling to achieve a final geometry and required surface quality.

[0011] Submerged Arc Additive Manufacturing (SAAM) is an additive manufacturing process for metal components and structures. It is technically based on submerged arc welding and combines this with the principles of additive manufacturing. In this process, a metal wire is melted and deposited layer by layer beneath a layer of powder in an arc process, enabling the creation of massive, large-format metal components. This allows for the energy-efficient and relatively fast production of very large components, with improved material properties due to the controlled welding process. The technology is particularly well-suited for applications requiring components ranging from several hundred kilograms to several tons. Furthermore, the SAAM process can be used to manufacture intricate structures.

[0012] The WAAM or SAAM process can be performed on a table that moves in a plane along a track created from a digital model to build an object layer by layer. A coating head moves vertically upwards when each layer is complete. Some systems even use 5-axis or 6-axis systems (i.e., articulated arms) capable of applying material to the workpiece with few to no spatial access restrictions.

[0013] The term "computed tomography component" refers to all components attached to the rotating frame or base. Specifically, the rotating frame component can refer to components that rotate around the patient during CT data acquisition. This can include, in particular, the X-ray source and the X-ray detector. Typically, the rotating components of the CT scanner are attached to the rotating frame. Other rotating components can include, for example, filters and apertures positioned in front of the X-ray tube, a radiator cooling system, a voltage generator, and other electronic devices necessary for the operation of the X-ray tube and detector, provided these cannot be stationary and located outside the rotating frame, but must be directly connected to the X-ray source and detector in order to function.

[0014] A component mounting structure can be understood as a fastening structure used to position this component within the assembled CT scanner and to attach it to the rotating frame. In particular, the mounting structure can be manufactured, at least partially, using additive manufacturing processes such as WAAM or SAAM.

[0015] Advantageously, a first section of at least one receiving structure can be manufactured using the WAAM process, while a second section can be manufactured using the SAAM process. This allows the advantages of the different manufacturing processes to be combined, for example, by manufacturing intricate structures with thinner walls using the SAAM process.

[0016] The frame for the computed tomography scanner can be a rotating frame, in particular for a gantry, of the computed tomography scanner or a frame for a, in particular portable, computed tomography scanner.

[0017] The rotating frame forms a large, ring-shaped structure through which the patient is moved during the examination. This rotating ring houses all the essential components for image acquisition, including the X-ray tube that generates the beam and an opposing detector ring that measures the attenuated radiation. During the examination, the rotating frame spins around the patient at very high speed, creating numerous projections from different angles that are later reconstructed into precise cross-sectional images. The rotating frame also integrates collimators for beam shaping, cooling systems for the heavily stressed X-ray tube, and lasers for precise patient positioning. Due to its stable construction, the precise alignment of its components, and its high rotational speed, the rotating frame significantly influences the image quality, speed, and comfort of a CT scan.The rotating base is typically rotatable around an axis, which in the installed CT scanner usually runs horizontally through the center of the gantry. The rotating components of the CT scanner can be arranged approximately in a ring around this axis.

[0018] The frame for a computed tomography (CT) scanner can include a load-bearing base structure designed to accommodate and precisely position a rotating gantry system. The frame typically consists of a torsionally rigid structure engineered to minimize mechanical vibrations during operation. Within the frame, a ring-shaped recess may be provided to house the rotatable gantry. The frame incorporates integrated guide elements and attachment points to ensure precise alignment of the gantry relative to the patient table. Overall, the frame serves as the mechanical foundation for the precise, reproducible, and safe operation of the CT scanner.

[0019] By manufacturing at least part of the components using additive manufacturing processes such as WAAM or SAAM, it is possible to optimize the topology and structure of the bogie, frame, or mounting structure for lightweight construction while simultaneously maximizing rigidity. This allows for the calculation of unconventional topologies or structures, such as those with non-rotational symmetry, that can withstand the loads expected at a given high rotational speed. The calculations can also incorporate safety elements or structures that prevent complete failure in the event of a local crack in the bogie.

[0020] For example, a 3D-printed bogie with a structurally optimized design and / or a structurally optimized frame design, including the respective mounting structures, can be provided. This is achieved by manufacturing structures with cavities and cutouts and by selectively reinforcing the structures with support structures both inside and outside the structures, thereby saving material. Additionally, the wall thickness of the structures can be optimized. The considerable design freedom in shaping the frame and / or the mounting structure makes it possible to achieve a low weight, particularly through thin walls and / or the use of a material with a low specific gravity, while still providing sufficient rigidity and dimensional stiffness for the required high rotational speeds, or even for higher speeds than currently possible.

[0021] In particular, the bogie can be manufactured, at least partially, using additive manufacturing via a WAAM or SAAM process. Alternatively or additionally, the bogie can be manufactured, at least partially, from a rolled or forged metal element. Alternatively or additionally, the bogie can be manufactured from a cast metal element.

[0022] According to an alternative embodiment, the bogie is manufactured entirely by additive manufacturing using the WAAM or SAAM processes. This allows for extensive optimization of the design. The bogie can be manufactured as a single piece, or it can be constructed from several interconnected elements, with the individual elements themselves being manufactured using additive manufacturing. This allows for the combination of different materials, resulting in a high degree of design freedom.

[0023] The rotating frame, frame or mounting structure can be additionally machined after additive manufacturing, e.g. by turning or milling, for example to create recesses or to compensate for distortions or to produce fine structures.

[0024] In particular, the turntable can be suitable for rotational speeds exceeding 260 rpm, preferably around 280 to 320 rpm. An increased rotational speed can result in improved temporal resolution or reduced radiation exposure for the patient. Specifically, less rotational and acceleration energy can be required during operation of the computed tomography scanner if the weight of the rotating unit (turntable and rotating components) is reduced. This allows for a smaller rotary motor to drive the turntable and / or faster acceleration to the rated speed, which in turn translates into shorter waiting times for patients and higher patient throughput.

[0025] Reducing the weight of the bogie also has the advantage of reducing the static load on the bogie's rotating bearing. Furthermore, the weight saved on the bogie and frame can also reduce transport costs and result in lower ground pressure.

[0026] According to one embodiment, the bogie weighs 10%–15%, preferably 15%–30%, less than a corresponding bogie made of cast aluminum according to the prior art. The weight savings achievable through additive manufacturing and the optimized structure are therefore considerable.

[0027] According to one embodiment, the bogie has such rigidity that, during rotation in the operation of the computed tomography scanner, it is deformable by a maximum of 0.3 mm, preferably up to 0.2 mm. Rotation here refers to a rotational speed of at least 240 rpm, preferably at least 300 rpm. According to a prior art, considerably higher deformation is to be expected at such speeds, in particular up to 0.6 mm or even more.

[0028] In particular, the additive manufacturing of the bogie or frame using the WAAM or SAAM processes can shorten research and development cycles for computed tomography (CT) scanner hardware, especially since prototypes can be provided more quickly and different concepts can be manufactured and tested in parallel. This is particularly true because no special tools or molds are required for manufacturing the bogie or frame. Repairs and improvements can be carried out quickly and easily. Furthermore, it becomes possible to produce a customized bogie or frame in series production. Additional advantages include increased material efficiency and potential cost savings in further development, as existing designs can be built upon.

[0029] The bogie, frame, or mounting structure can be made, at least partially, from one of the following materials: steel, a steel alloy, aluminum, an aluminum alloy, a titanium alloy, a chromium-cobalt alloy, or a magnesium alloy. Preferably, it is made, at least partially, from a material suitable for additive manufacturing and / or relatively lightweight.

[0030] For the WAAM process, aluminum alloys are particularly suitable, especially those exhibiting good weldability and forming stable, crack-free weld beads during the arc welding process. Alloys of the 5xxx series based on aluminum and / or magnesium, such as 5356, 5183, or 5556, are especially well-suited because they have a very low tendency to hot crack, are easy to process, and offer robust mechanical properties. Alternatively or additionally, 4xxx alloys such as 4043 or 4047 can be used, which, due to their silicon content, provide excellent flowability and a comparatively smooth surface. For demanding applications, AlMgSc alloys such as Scalmalloy can be employed, which achieve an extremely fine microstructure and high strength due to the presence of scandium.

[0031] Preferably, the receiving structure can have a cavity. This allows the receiving structure to have a low mass, in particular to reduce the weight of the bogie or frame. This cavity can be arranged within a wall of the receiving structure.

[0032] According to one aspect, it is proposed that the receiving structure incorporates a rib. This rib can be designed, in particular, to increase the stability of the receiving structure. Alternatively or additionally, the rib can incorporate a cavity, specifically to reduce the weight of the receiving structure to which it belongs.

[0033] The rib can be a reinforcing element of the receiving structure, designed to improve its stiffness, load distribution, or dimensional stability. The rib can be designed as an elongated, plate-like, or web-shaped projection extending from a base or wall of a part of the receiving structure. The rib's cross-section can be shaped to efficiently absorb mechanical stresses—particularly bending, compressive, and shear forces—and transfer them into a base body, such as a base plate of the bogie or frame. The rib can thus act as a structural feature of the receiving structure and be designed to improve its load-bearing behavior locally or globally.

[0034] Preferably, the rib can be aligned in a load direction of the receiving structure. For example, the rib can be aligned radially to an axis of rotation of the bogie in order to absorb and transfer centripetal forces that are transmitted from the component to the receiving structure when the bogie rotates.

[0035] Advantageously, the outer contour of the mounting structure can be columnar, with a cross-section of the outer contour being laterally shifted depending on the height. For example, the outer contour of the mounting structure can be shaped such that the mounting structure can be described by an eccentric central axis. This allows for more flexible selection of mounting points for a component using this mounting structure, particularly if, for example, a recess is located below a desired mounting point.

[0036] In particular, the cavity of the receiving structure can be formed by a wall encompassing the cavity. The receiving structure can include a support structure located within the cavity. The wall and the support structure can be at least partially manufactured using additive manufacturing processes such as WAAM or SAAM. By arranging a support structure within the cavity of the receiving structure, the stability of the receiving structure can be increased precisely where forces must be absorbed. This allows the required stability of the receiving structure to be provided with low mass.

[0037] One aspect proposes that at least one manufacturing parameter of the WAAM or SAAM process for the wall should differ from the corresponding manufacturing parameter of the WAAM or SAAM process for the support structure. This would allow the wall properties to be optimized independently of the support structure properties.

[0038] In the WAAM process, changes in process parameters are clearly visible in the resulting structures. The process is based on an electric arc that melts a metal wire and builds up a component layer by layer. Since energy input, material feed, and path planning directly influence the shape of the additive manufacturing melt pool, different settings are immediately reflected in the geometry, surface quality, and material properties of the finished component. Variations in current, voltage, wire feed rate, or welding speed lead to clearly visible differences in path width and bead height. Higher energy input or a greater wire feed rate produces wider and higher beads, while a higher welding speed results in narrower and flatter beads.Depending on the manufacturing parameters, the layer thickness and the overlap between the layers also leave characteristic patterns, such as steps, waves or gaps.

[0039] The surface of the structure can also show clear traces of the manufacturing parameters. High energy input can lead to smoother surfaces, while insufficient energy input produces a rough, uneven structure. A typical feature of the WAAM process is the so-called ripple pattern, a wave-like structure along the weld bead whose frequency and amplitude depend heavily on the welding speed, wire feed rate, and the process mode used. Thermal effects also play a significant role. Excessive energy input or insufficient cooling times between layers lead to distortion, misalignment, or sagging weld beads. The interpass temperature influences the fusion of the layers and thus the structural integrity of the component. The interpass temperature is the temperature of a component between layers immediately before the next weld bead or layer is applied.

[0040] Even at the microstructural level, the parameters leave a clear mark. Different cooling rates and energy inputs alter the grain structure, which in turn affects hardness and strength. High temperatures promote coarse grains, while lower temperatures produce finer microstructures. Typical defects such as pores, undercuts, excessive weld beads, or incomplete fusion can often be directly attributed to specific parameter combinations, such as incorrect gas flow rates, unsuitable wire feed rates, or excessively high welding speeds.

[0041] Overall, WAAM components demonstrate a very direct reflection of the set process parameters. The effects of different process parameters are clearly visible both macroscopically – in the form of geometry, roughness, waviness, and distortion – and microscopically – in grain structure, porosity, and hardness profile. This characteristic makes the WAAM process both sensitive to parameter deviations and valuable for adaptive process control, which can utilize precisely these visible changes for quality monitoring.

[0042] Even with the SAAM process, different process parameters can be detected in the finished structure. The way a structure is additively manufactured leaves characteristic traces in its microstructure, its mechanical properties, and even its surface finish. Different process parameters—such as electrical power, scan speed, layer thickness, or the orientation of the component in the build chamber—lead to varying cooling rates and thus to different microstructures. These differences can be visualized metallographically, for example, by analyzing grain size, texture, or pore distribution. Mechanical tests such as tensile tests or hardness measurements can also reveal significant deviations between structures manufactured with different process parameters.Even surface roughness can provide clues about the manufacturing process or process parameters. These differences can be visualized metallographically, for example, by analyzing grain sizes, textures, pore distribution, or inclusion formation. Overall, it can be said that SAAM components possess a kind of "process-related fingerprint" that makes it possible to identify manufacturing differences in the product after the fact.

[0043] Advantageously, the imaging structure can include a coupling device for mechanical connection to the computed tomography component. In particular, the support structure within the imaging structure can be arranged in such a way as to stabilize the coupling device of the imaging structure.

[0044] The support structure can be arranged, in particular, below a coupling device for mechanical connection with a component rotating with the bogie.

[0045] In particular, the coupling device of the receiving structure can include a sleeve. The material of this sleeve can be different from the material of the receiving structure. According to one embodiment, the sleeve can be configured to receive a connecting element for mechanically coupling the computed tomography component to the receiving structure. In particular, such a sleeve can be provided for a receiving structure that secures a component that requires frequent replacement.

[0046] According to one aspect, it is proposed that the frame, i.e., the bogie or frame, has a base plate. The receiving structure can be mechanically coupled to the base plate, at least partially, using additive manufacturing processes such as WAAM or SAAM. In other words, a fused connection between the base plate and the wire can be formed by melting the base plate and the wall of the receiving structure. The base plate can be manufactured, at least partially, using additive manufacturing processes such as WAAM or SAAM. Alternatively or additionally, the base plate can be made from a rolled or forged metal element. Alternatively or additionally, the base plate can be made from a cast metal element. In other words, the bogie / frame can have other elements besides the base plate.

[0047] The receiving structure can, in particular, have a base area that directly adjoins the base plate. An outer surface of the base area can be at least partially concave, especially by means of the WAAM or SAAM processes and by means of additive manufacturing.

[0048] Particularly preferably, the receiving structure can be mechanically machined after additive manufacturing to compensate for tolerances or distortions of the structures.

[0049] It is proposed that at least one manufacturing parameter of the WAAM or SAAM additive manufacturing process for a first layer of the base area directly adjacent to the base plate differs from a manufacturing parameter of the WAAM or SAAM additive manufacturing process for a region of the wall of the receiving structure adjacent to the base area. This allows for a particularly good bond between the first layer of the base area or the receiving structure and an underlying base plate, especially if the base plate was not manufactured using the WAAM or SAAM process in at least one contact area with the receiving structure. The different manufacturing parameters also compensate for differences in the thermal mass of the base plate and the first layer of the base area or the receiving structure.

[0050] As already stated, the base plate can be made from a rolled metal element or a cast metal element. Alternatively or additionally, the base plate can be manufactured, at least partially, using additive manufacturing processes such as WAAM or SAAM.

[0051] Preferably, a base part of the receiving structure can be formed by a structural element of the base plate. A part of the receiving structure located outside the base part can be manufactured using the WAAM or SAAM additive manufacturing process. In other words, the receiving structure has both a base part that was formed or manufactured together with the base plate and a part located outside the base structure that was manufactured using additive manufacturing.

[0052] Particularly preferably, the frame can include a cooling element having an inlet port and an outlet port for a fluid. The cooling element can have an internal structure configured to form at least one channel that fluidically couples the inlet port to the outlet port. The cooling element and / or its internal structure can be manufactured using the WAAM or SAAM processes and additive manufacturing.

[0053] In particular, the cooling element's channel can be designed in a meandering shape to maximize the contact area between the fluid and the channel's surface. The fluid can be a liquid, such as water, or a gas that flows through the channel. A component of the bogie can be in indirect thermal contact with the cooling element to dissipate heat from the component.

[0054] A gantry for a computed tomography scanner is proposed, which has one of the bogies described above, wherein a rotating component of the computed tomography scanner is attached to the bogie by means of one of the recording structures described above.

[0055] In particular, the rotating component can be an X-ray source or an X-ray detector unit.

[0056] The gantry typically has standard dimensions and, in addition to the bogie and the rotating components used in it, may also include a support frame and a cladding.

[0057] A computed tomography (CT) scanner is proposed that incorporates one of the racks described above and / or the gantry described above. The CT scanner may also include a gantry as described above. Additional components, such as a computer for reconstructing the acquired data and an operator console, may also be part of the CT scanner. All advantages and embodiments described with regard to the rack also apply to the gantry and the CT scanner, and vice versa.

[0058] A method for manufacturing one of the frames described above is proposed, which specifically incorporates additive manufacturing steps of the WAAM or SAAM process for manufacturing one of the bogies, frame structures, or mounting structures described above. All the described features and advantages of the frame and the computed tomography scanner also apply to the method, and vice versa.

[0059] All embodiments described herein can be combined with one another, unless explicitly stated otherwise. Further features, advantages, and applications of the present invention will become apparent from the following description, the exemplary embodiment, and the figures. These show: Fig. 1 an isometric view of a bogie with mounting structures; Fig. 2 a bogie coupled to a frame; Fig. 3 an isometric view of a recording structure with a rib; Fig. 4 an isometric representation of an internal structure of the recording structure with rib; Fig. 5 an isometric representation of an internal structure of a recording structure with support structure; Fig. 6 an isometric view of an elongated recording structure; Fig. 7 an isometric view of a column-shaped recording structure with an eccentric central axis; Fig. 8 an isometric view of an outer surface of a recording structure with a base area that is concave.

[0060] The Fig. Figure 1 schematically sketches an isometric view of a turntable 100 for a computed tomography (CT) scanner, which has a base plate 105 and a plurality of mounting structures 110 that can have different structures. At least one mounting structure 110 is at least partially manufactured using a WAAM or SAAM additive manufacturing process. The at least one mounting structure 110 is coupled to the base plate 105 using a WAAM or SAAM additive manufacturing process. The at least one mounting structure 110 is configured to attach a component of the turntable 100 of the CT scanner. The turntable 100 can be part of a gantry of the CT scanner. The CT scanner can, in particular, be a portable CT scanner. The base plate 105 can, in particular, be at least partially manufactured using a WAAM or SAAM additive manufacturing process.Alternatively or additionally, the base plate 105 can be made from a rolled or forged metal element. Alternatively or additionally, the base plate can be made from a cast metal element. The base plate 105 can have a cutout 107 to reduce the overall mass of the bogie 100. This cutout 107 can result from additive manufacturing using a WAAM or SAAM process, or it can be produced by machining the base plate 105.

[0061] The Fig. Figure 2 schematically sketches an isometric view of a computed tomography (CT) scanner without an outer housing, showing the bogie 100 coupled to a frame 200. A plurality of components 115 of the CT scanner are mounted on the bogie 100 by means of at least one mounting structure 110. The CT scanner can have a plurality of wheels 260 coupled to the frame 200 to allow the CT scanner to be used in different locations. The frame 200 is coupled to a plurality of components 250 of the frame 200 by means of at least one mounting structure 110. The frame 200 includes a supporting base structure (not shown) designed to receive the bogie 100. For this purpose, the base structure can have an annular receptacle (not shown) which can be configured to allow the bogie 100 to rotate relative to the frame 200.The frame 200 can serve to provide a mechanical basis for ensuring precise, reproducible and safe operation of the computed tomography scanner.

[0062] The Fig. Figure 3 schematically sketches an isometric top view of a rib-shaped receiving structure 120, the outer shape of which comprises a cylindrical base structure 122 and a rib 124. The rib 124 is arranged directly adjacent to the cylindrical base structure 122 and extends along a direction perpendicular to a central axis of the cylindrical base structure 122. The rib-shaped receiving structure 120 and / or the rib 124 may have a cavity, which is described in more detail below. The rib 124 can improve the stability of the rib-shaped receiving structure 120, particularly in the direction of its extension.The rib-shaped receiving structure 120 can be manufactured directly adjacent to a surface of the base plate 105 of the bogie 100 or directly adjacent to a surface of a base plate (not shown) of the frame 200 using the WAAM or SAAM process and additive manufacturing. The rib-shaped receiving structure 120 is mechanically coupled to the base plate 105 of the bogie 100 or the base surface of the frame 200 by means of a manufacturing step of the WAAM or SAAM process, in that at least a first layer of the additively manufactured rib-shaped receiving structure 120 is connected to the respective base surface by the process. This at least first layer of the receiving structure 120 is directly adjacent to the surface of the respective base plate 105. The rib-shaped receiving structure 120 can have a base area 126 that is directly adjacent to the base plate 105.An outer surface of the base area 126 can be at least partially concave, in particular by means of the WAAM or SAAM processes and by means of additive manufacturing. In particular, the first layer of the receiving structure 120 can be the first layer of the base area 126. The rib-shaped receiving structure 120 can be formed based on an outer wall 127, which is additively manufactured and which adjoins the base area 126 in a build direction of the receiving structure 120. When forming the base area 126, a manufacturing parameter of the WAAM or SAAM process for the additive manufacturing of the first layer of the base area 126, which directly adjoins the base plate 105, can differ from a manufacturing parameter of the WAAM or SAAM process for the additive manufacturing of the outer wall 127. This can, for example, ensure that the first layer of the rib-shaped receiving structure 120, or the first layer of the base area 126, is concave.of the base area 126, forms a fixed connection with the respective base plate 105. This can be particularly relevant if the respective base plate 105 was not manufactured using one of the aforementioned additive manufacturing processes, but rather by means of a casting process.

[0063] The Fig. Figure 4 schematically sketches in an isometric view an internal structure of the rib-shaped receiving structure 120 with the rib 124, which is part of the rib-shaped receiving structure 120. Fig. 3, except for the base area not shown here, corresponds to the first cavity 129 of the rib-shaped receiving structure 120. Additionally, the cylindrical base structure 122 of the rib-shaped receiving structure 120 can have a second cavity 125. This second cavity 125 is formed by a wall 127 encompassing the cavity 125, which is constructed using the WAAM or SAAM process and additive manufacturing. Furthermore, the rib-shaped receiving structure 120 can have a hollow cylindrical support structure 128 located within the second cavity 125. The hollow cylindrical support structure 128 can be shaped, at least partially, like a hollow cylinder. The hollow cylindrical support structure 128 can also be directly adjacent, at least partially, to an inner surface of the wall 127.Both the wall 127 of the rib-shaped receiving structure 120 and the hollow cylindrical support structure 128 are manufactured using additive manufacturing via the WAAM or SAAM process. Preferably, the rib-shaped receiving structure 120 can have a further hollow cylindrical support structure 123, which at least partially adjoins the inside of the wall 127, wherein the entire further hollow cylindrical support structure 123 in the second cavity 125 of the rib-shaped receiving structure 120 is spaced further away from the respective base plate 105 than the support structure 128. At least one manufacturing parameter of the WAAM or SAAM process for the wall 127 of the rib-shaped receiving structure 120 can differ from the corresponding manufacturing parameter of the WAAM or SAAM process for the hollow cylindrical support structure 128 and / or the further hollow cylindrical structure 123.

[0064] The wall 127 of the rib-shaped receiving structure 120 can be configured with a cylindrical opening 121, located at an upper end of the cylindrical base structure 122, to receive a sleeve (not shown). The sleeve can be configured to interact with a connecting element, such as a screw, to mechanically couple the computed tomography component to the receiving structure. The sleeve can be made of a material different from that of the wall 127 of the rib-shaped receiving structure 120. In particular, the material of the sleeve can be selected to exhibit less wear when repeatedly coupled with the connecting element.

[0065] The Fig. Figure 5 schematically sketches an isometric representation of the internal structure of a block-shaped receiving structure 130 with an anchored support structure 138, wherein the anchored support structure 138 is arranged within a cavity 131 of the block-shaped receiving structure 130. This anchored support structure 138 can be arranged within the cavity 131 of the block-shaped receiving structure 130 adjacent to two internal surfaces of the block-shaped receiving structure 130 and can be anchored to the internal surfaces by means of an additive process. The anchored support structure 138 can be arranged such that the component of the computed tomography scanner is coupled to the receiving structure 130 at a location of the block-shaped receiving structure 130 that is supported by the anchored support structure 138.A wall 132 of the block-shaped receiving structure 130 and the anchored support structure 138 are additively manufactured using the WAAM process or the SAAM process.

[0066] Additionally or alternatively, the wall 132 of the block-shaped receiving structure 130 can be stabilized by means of a first reinforcing support structure 136 and a second reinforcing support structure 137, which are arranged within the cavity 131 of the block-shaped receiving structure 130, at least partially adjacent to an inner surface of the wall 132 of the block-shaped receiving structure 130. Both the first reinforcing support structure 136 and the second reinforcing support structure 137 are additively manufactured using the WAAM or SAAM process. The wall 132 of the block-shaped receiving structure 130 can be stabilized, in particular, by means of both the first reinforcing support structure 136 and the second reinforcing support structure 137.

[0067] The manufacturing parameters of the WAAM process or the SAAM process of the wall 132 of the block-shaped receiving structure 130 may differ from the corresponding manufacturing parameters of the WAAM process or the SAAM process of the first reinforcing support structure 136 and / or the second reinforcing support structure 137 or the anchored support structure 138 of the receiving structure 130.

[0068] The block-shaped receiving structure 130 can have a base area which is directly adjacent to the base plate 105 and corresponds in terms of manufacturing technology and structure to the base area described above.

[0069] The Fig. Figure 6 schematically sketches an isometric representation of a cylindrical receiving structure 140, in which a base part of the cylindrical receiving structure 140 is formed by a structural element 152 of the base plate 105. The cylindrical receiving structure 140 can have a flat surface area 142, which is designed to be positioned directly adjacent to a flat surface area of ​​the structural element 152. The cylindrical receiving structure 140 is additively manufactured outside the base part using the WAAM or SAAM process. The structural element 152 can be manufactured together with the base plate 105. This means, in particular, that the base plate 105 and the structural element 152 can be at least partially manufactured using additive manufacturing via a WAAM or SAAM process.Alternatively or additionally, the base plate 105 and the structural element 152 can be made from a rolled or forged metal element. Alternatively or additionally, the base plate 105 under structural element 152 can be made from a cast metal element.

[0070] The cylindrical receiving structure 140 can have a base area which is directly adjacent to the base plate 105 or the structural element 152, and which corresponds in terms of manufacturing technology and structure to the base area described above.

[0071] The Fig. Figure 7 schematically sketches an isometric view of a column-shaped receiving structure 150, in which a cross-section of the outer contour is laterally shifted depending on the height. This means that the column-shaped receiving structure 150 has an eccentric central axis. The column-shaped receiving structure 150 is additively manufactured using the WAAM or SAAM process. The column-shaped receiving structure 150 can have a base area that directly adjoins the base plate 105 or a structural element and which corresponds to the base area described above in terms of manufacturing technology and structure.

[0072] The Fig.Figure 8 schematically sketches an isometric view of a cylindrical receiving structure 160 with a base region 166 whose outer surface is at least partially concave. The at least partially concave outer surface of the base region 160 can be formed using the WAAM process or the SAAM process and by additive manufacturing. In particular, the first layer of the cylindrical receiving structure 160 can correspond to the first layer of the base region 160. The cylindrical receiving structure 160 can have a wall 163, which is additively manufactured and adjoins the base region 166 in a build direction of the cylindrical receiving structure 160. The wall 163 of the cylindrical receiving structure 160 can have a cavity enclosed by the wall 163 and terminating in an opening 161 at an upper end of the cylindrical receiving structure 160.During the formation of the base area 126, a manufacturing parameter of the WAAM or SAAM process for the additive manufacturing of the first layer of the base area 126, which directly adjoins the base plate 105, can differ from a manufacturing parameter of the WAAM or SAAM process for the additive manufacturing of the outer wall 163. This can, for example, ensure that the first layer of the cylindrical receiving structure 160, or of the base area 126, forms a strong bond with the respective base plate 105. This can be particularly relevant if the respective base plate 105 was not manufactured using one of the aforementioned additive manufacturing processes.

[0073] Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples and other variations can be derived by the person skilled in the art without leaving the scope of protection of the invention. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 4 265 188 B1

[0005]

Claims

[1] Frame (100, 200) for a computed tomography scanner, wherein the frame (100, 200) has at least one receiving structure (110, 120, 130, 140, 150, 160) which is configured to mount a component (115, 205) of the computed tomography scanner, characterized by , that the receiving structure (110, 120, 130, 140, 150, 160) is at least partially manufactured by a WAAM process or SAAM process using additive manufacturing. [2] Frame (100, 200) according to claim 1, wherein the frame (100, 200) for the computed tomography scanner is a rotating frame (100) for a gantry of the computed tomography scanner or a frame frame (200) for a, in particular portable, computed tomography scanner. [3] Frame (100, 200) according to claim 1 or 2, wherein an outer contour of the receiving structure (150) is designed in a columnar shape, wherein a cross-section of the outer contour is laterally displaced depending on the height. [4] Frame (100, 200) according to one of the preceding claims, wherein the receiving structure (110) has a cavity (125, 129, 131). [5] Frame (100, 200) according to claim 4, wherein the receiving structure (120) has a rib (124), in particular wherein the rib (124) is configured to increase the stability of the receiving structure (120), and / or the rib (124) has the cavity (129). [6] Frame (100, 200) according to claim 4 or 5, wherein the cavity (125, 129, 131) of the receiving structure (120, 130) is formed by a wall (127, 132) encompassing the cavity (125, 131), wherein the receiving structure (120, 130) has a support structure (128, 138) which is arranged within the cavity (125, 131), and wherein the wall (127, 132) and the support structure (128, 138) are at least partially produced by the WAAM process or SAAM process using additive manufacturing. [7] Frame (100, 200) according to claim 6, wherein at least one manufacturing parameter of the WAAM process or SAAM process of the wall (127, 132) is different from the corresponding manufacturing parameter of the WAAM process or SAAM process of the support structure (128, 138). [8] Frame (100, 200) according to one of the preceding claims, wherein the frame (100, 200) has a base plate (105) and wherein the receiving structure (120, 130, 150, 160) is at least partially mechanically coupled to the base plate (105) by the WAAM process or SAAM process using additive manufacturing. [9] Frame (100, 200) according to claim 8, wherein the receiving structure (120, 130, 150, 160) has a base area (126, 166) which is directly adjacent to the base plate (105), and wherein an outer surface of the base area (126, 166) is at least partially concave, in particular by the WAAM process or SAAM process using additive manufacturing. [10] Frame (100, 200) according to claim 9, wherein at least one manufacturing parameter of the WAAM or SAAM additive manufacturing process of a first layer of the base area (126, 166) directly adjacent to the base plate (105) differs from a manufacturing parameter of the WAAM or SAAM additive manufacturing process of an area of ​​the wall (127, 163) of the receiving structure (120, 130, 150, 160) adjacent to the base area (126, 166). [11] Frame (100, 200) according to one of claims 8 to 10, wherein the base plate (105) is made from a rolled metal element or the base plate (105) is made from a cast metal element or the base plate (105) is at least partially produced by the WAAM process or SAAM process using additive manufacturing. [12] Frame (100, 200) according to one of claims 8 to 11, wherein a base part of the receiving structure (140) is formed by a structural element (152) of the base plate (105) and wherein a part of the receiving structure (140) arranged outside the base part is produced by additive manufacturing using the WAAM process or SAAM process. [13] Frame (100, 200) according to one of the preceding claims, which has a cooling element with an inlet port and an outlet port for a fluid, wherein the cooling element has an internal structure which is configured to form at least one channel which fluidically couples the inlet port to the outlet port, and wherein the cooling element and / or the internal structure of the cooling element is produced by the WAAM process or SAAM process using additive manufacturing. [14] Gantry for a computed tomography scanner, wherein the gantry comprises the frame (100, 200) according to any one of claims 1 to 13, in particular wherein the component (115, 205) of the computed tomography scanner, in particular an X-ray source and / or an X-ray detector unit, is attached to the frame (100, 200) by means of the receiving structure (110). [15] Computed tomography scanner comprising the frame (100, 200) according to any one of claims 1 to 13 and / or the gantry according to claim 14.

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