Support frame for an angiography system

Abstract

The invention relates to a curved support frame (TR) for an angiography system (100), which is designed as a hollow body, comprising a first and a second frame element (RE1, RE2), wherein the first and the second frame element (RE1, RE2) together form a closed lateral surface of the support frame (TR).

Description

The invention relates to a supporting frame for an angiography system and an angiography system.Angiography systems are medical examination or treatment devices and have a C-arm on which examination or treatment devices, for example an X-ray source, a diaphragm and an X-ray detector, are arranged, which can be moved in space via the C-arm. X-ray source and x-ray detector serve for the acquisition of fluoroscopic images, for example before, after or during a medical procedure on a patient. The C-arm is usually arranged on a movement device, for example a stand mounted on the floor or suspended on the ceiling or a multi-axis joint arm. A support arm and / or an intermediate carriage can furthermore be provided between stand and C-arm, so that the C-arm can be adjusted in space movably by several degrees of freedom in relation to its surroundings, in order to be able to position the equipment arranged on the C-arm to the patient for a desired X-ray imaging.C-arm, support arm and / or intermediate carriage typically have a curved shape, i.e. their shape is reproduced from a circumferential segment of a fictitious circle. In other words, its longitudinal axis runs on an orbital path or essentially on an orbital path.It is known to produce a supporting profile for a C-arm, a supporting arm and / or an intermediate carriage by, for example, extruding an aluminum compact and subsequently rolling it into the desired orbital shape. Alternatively, the profile is produced as a metal casting component, usually likewise from aluminum or an aluminum alloy. Due to the process, regions with increased and / or non-uniform wall thickness occur in casting methods, which have more material than would be necessary due to the load. Complicated machining post-processing is then required in order to achieve the required dimensional accuracy.Alternatively, it is known to produce a load-bearing profile by means of welding assemblies in which a type of box shape is assembled from a plurality of sheets. This process is very complicated, since many individual parts have to be welded on account of the curvature of the profile. These must be individually manually clamped in a defined relative position before the actual welding, which is very time-consuming and thus labour-intensive. In addition, with a large number of parts, many welding points or welded seams and, if appropriate, their subsequent processing are required, which likewise disadvantageously increases the assembly time.In various examination or treatment methods, the C-arm must be moved around the patient at high speed in order to record 3D images. Increasingly higher requirements are placed here with regard to the rigidity and the increase in the natural frequency of the angiography system in order to achieve the desired image quality and in particular smoothness of running. In order to increase the rigidity of the C-arm, the wall thickness could be increased, which, on the one hand, however, increasingly complicates the production of the C-arm and necessarily also would result in a considerable increased weight of the installation, as a result of which the moving mass would also increase. This would be at the expense of the wear behavior and the design costs for drives and the like. In addition, the natural frequency of the system would be reduced, which impairs the stability of the C-arm movement.Document US 5 426 683 A describes a one-piece C-arm profile for use with X-ray diagnostic technology, comprising in cross-sectional view two generally vertical side walls extending substantially parallel to each other, an inner support wall connecting the side walls and an outer support wall spaced from the inner support wall and connecting the side walls. A pair of flanges extend outwardly from the respective side walls and toward each other to define at least one channel along an outer portion of the C-arm frame in which wheels or bearings may be housed to enable movable attachment of the C-arm to the diagnostic technique.The publication DE 10 2020 003 363 B3 discloses a hybrid C-profile for the C-arm of a C-arm X-ray device, comprising a lightweight circular-arc-shaped profile and a steel circular-arc-shaped profile which are connected by connecting means. The lightweight profile serves as a base body and can be a hollow profile with reinforcements for energy and data lines or an open profile which is covered by the steel profile. The steel profile has running surfaces for carrying rollers and guide rails for guide rollers. Connecting elements comprise tongue and groove connections, in which the tongues run orthogonally to the running surfaces and are possibly provided with grooves or profiles. The lightweight profile consists of light metal alloys such as aluminum or magnesium and can be produced by extrusion, casting or as a plastics composite component. The steel profile may be formed from ordinary steel, stainless steel or by various bending techniques.In contrast, the object is to provide a support frame for an angiography system that is optimized with regard to its mechanical stability. Furthermore, the object is to provide a supporting frame which is optimized with regard to its production outlay.This object is achieved by a support frame and an angiography system according to the independent claims. Preferred and / or alternative advantageous embodiment variants are the subject matter of the dependent claims.In a first aspect, the invention is directed to a curved supporting frame for an angiography system. This frame element is designed as a hollow body and comprises a first and a second frame element, wherein the first and the second frame element together form a closed lateral surface of the supporting frame.Advantageously, the support frame comprises only one supporting sleeve or sleeve profile, i.e. the support frame is empty or hollow in its interior, so that the interior is suitable in particular for accommodating supply and / or data transfer lines of the angiography system therein.Furthermore, the supporting construction of the supporting frame is formed or assembled from only two components, namely the first and the second frame element. This significantly reduces the number of individual components during production and the overall material requirement. The small number of parts also reduces the number of joining steps required, such as for example. Welding and post- or intermediate processing steps such as, for example. Bends.In a further aspect, the invention is directed to an angiography system comprising a support frame according to the invention. The angiography system comprises a C-arm, at the ends of which an X-ray source or, opposite, an X-ray detector are arranged, which cooperate for X-ray imaging. The angiography system can be a ground-mounted or ceiling-suspended system or a system that can be moved in a mobile manner on the underlying surface. In embodiments, the angiography system can be fastened to the floor or room ceiling via a stand. Starting from this stand, at least one support arm can be provided, on which the C-arm is mounted. Alternatively, the C-arm can be connected to a stand via a multi-axis joint arm, preferably a robot arm. In embodiments of the angiography system comprising a support arm, the latter is typically designed as a curved connecting unit between stand and C-arm, which is arranged rotatably at least in one, preferably in both, connection points. In particular in an embodiment comprising a support arm, an intermediate carriage can additionally be provided, wherein this intermediate carriage is then arranged between support arm and C-arm. In particular, the intermediate carriage provides a degree of freedom of movement in which the C-arm can be moved along its curved longitudinal axis on an orbital path and can be rotated accordingly on the orbital path about the isocentre of the angiography system. Overall, articulated arm, support arm and / or intermediate carriage in the various embodiments of the angiography system provide different degrees of translation and / or rotational freedom for the C-arm.In a preferred embodiment of the invention, the C-arm of the angiography system comprises the curved supporting frame according to the invention.In a further embodiment of the invention, the support arm of the angiography system comprises the curved support frame according to the invention.The intermediate carriage can likewise also be designed with the curved supporting frame according to the invention.Particularly preferably, both the support arm and the C-arm and, if present, the intermediate carriage are formed by means of a support frame according to the invention.In a preferred embodiment, the curvature of the supporting frame extends along the likewise curved longitudinal axis of the supporting frame. The curved longitudinal axis preferably runs on an orbital path. The curvature of the supporting frame correspondingly preferably simulates or approximates a circular path, i.e. in embodiments the curvature of the supporting frame is always the same over its length. In other embodiments, the curvature of the supporting frame can be different in circumferential sections, i.e. there are at least two circumferential sections whose curvature differs from one another. In these embodiments, the supporting frame in the mounted state preferably forms typical orbital shapes for a C-arm, a supporting arm and / or an intermediate carriage.The lateral surface of the supporting frame formed by means of the two frame elements extends about its longitudinal axis. In other words, the curved longitudinal axis of the supporting frame extends in the center thereof and passes substantially perpendicularly through the base and top surfaces of the supporting frame, which are not closed in the typical embodiment.The lateral surface formed by the first and the second frame element is closed, i.e. when the first and the second frame element assume their final relative position with respect to one another, the lateral surface has no gaps, openings, holes or gaps. The interior of the supporting frame is therefore, in a preferred embodiment, accessible only via the open base or top surface of the supporting frame.In a preferred embodiment of the invention, the frame elements have an extension in which they extend over the entire length of the supporting frame, i.e. from its base surface to its top surface. Its extension in the longitudinal direction is thus significantly greater than its extension running transversely thereto.In a preferred embodiment, the first and the second frame element each have a shape which, in the joined state of the frame elements, form a square or a rectangle in cross section. In other embodiments, the cross-sectional shape may also deviate therefrom. For example, the cross section of the lateral surface can be oval, elliptical or round or also in the form of a mixed shape. However, a rectangular shape has proven to be particularly favorable compared to the further variants with respect to the production method.The first and the second frame element are configured according to the invention as follows: The first frame element comprises a first partial surface and the second frame element in turn comprises a second partial surface, wherein the first and the second partial surface form mutually opposite parallel side surfaces of the supporting frame. In particular, the first and the second partial surface are configured such that they each extend over the entire length (along the curved longitudinal axis) of the supporting frame or of the frame elements. In other words, the first and the second partial surface form closed, i.e. contiguous, side surfaces of the supporting frame.A side surface of the supporting frame denotes a region of its lateral surface which lies parallel to the radius of the imaginary circle on whose orbital path the longitudinal axis of the supporting frame runs.According to the invention, the first and the second partial surface are formed if they each comprise at least two trapezoidal surface segments. In other words, at least two, preferably more than two, trapezoidal surface segments are respectively included in the first and in the second partial surface. In this case, the respectively at least two trapezoidal surface segments of one of the sub-surfaces lie with respectively at least one of their legs adjacent to one another. In other words, two adjacent trapezoids of the first and / or the second partial surface comprise a common leg. The at least two trapezoidal surface segments are connected to one another in a plane via the common limb, or they are formed integrally with one another. The sides of the trapezoidal surface segments running parallel together form outer edges of the first and the second partial surface. By configuring the individual surface segments as trapezoids, these can be arranged at any angle to each other, whereby one or in embodiments several desired curvatures can be set for the supporting frame.According to the invention, adjacent trapezoidal surface segments of the first and / or of the second sub-surface are arranged with respect to one another at an angle in the range from 155° to 175°, preferably in a range from 160° to 170°, particularly preferably at an angle of 165° or 167°. In this way, the desired radii of curvature and dimensions of a C-arm, a support arm and / or an intermediate carriage can be realized particularly well.In embodiments, the first frame element further preferably comprises at least a third and a fourth partial surface, which each extend perpendicularly from the first partial surface, in particular in order to form a square or rectangular cross section of the supporting frame. The second frame element is then formed analogously. It comprises at least a fifth and a sixth sub-surface, which each extend perpendicularly from the second sub-surface. In particularly preferred embodiments, the first and the second frame element comprise, in addition to the first and second partial surfaces, more than two, i.e. at least three or four, further partial surfaces. In this embodiment, first, third and fourth partial surfaces of the first frame element are formed integrally or continuously, and likewise the second, fifth and sixth partial surfaces of the second frame element.It should also be noted here that the third and fourth subareas and the fifth and sixth subareas do not touch one another directly, but are only contiguous via the first and the second subareas. In this respect, when the first and the second frame element are arranged in their final relative position with respect to one another, partial surfaces of the first frame element come into contact with partial surfaces of the second frame element in such a way that, for example, a partial surface of the first frame element is surrounded by partial surfaces of the second frame element or a partial surface of the second frame element is surrounded by partial surfaces of the first frame element.The at least third, fourth, fifth and sixth partial surfaces thus respectively form the remaining sides of the closed rectangular lateral surface of the supporting frame.The third and fourth partial surfaces of the first frame element are each connected to one of the trapezoidal surface segments of the first partial surface. In other words, the third and fourth subareas of the first frame element each adjoin one of the parallel sides of a respective trapezoid of the first subarea. The fifth and sixth partial surfaces of the second frame element are each connected to one of the trapezoidal surface segments of the second partial surface. In other words, the fifth and sixth partial surfaces of the second frame element also each adjoin one of the parallel sides of a respective trapezoid.Third, fourth, fifth and sixth partial surfaces consequently do not each extend over the entire length of the supporting frame (from its top surface to its base surface), but rather have a length substantially parallel to a longitudinal axis tangent which corresponds to the length of the parallel side of the associated trapezoidal surface segment.In a particularly preferred embodiment of the invention, the first and the second frame element are each designed with their different partial surfaces as bending plates. This embodiment has the advantage that the frame elements are first cut out of a sheet metal by means of laser cutting or a punching process and the at least third, fourth, fifth, sixth partial surface is subsequently bent up around the parallel sides of the trapezoidal surface segments of the first and second partial surface. Metal sheets can be obtained with low dimensional tolerances in various thicknesses; the dimensional accuracy of the sheet is not significantly impaired by the cutting out, and therefore a simplified production process can be carried out as part of an extrusion process or aluminum casting.During the bending process, the third, fourth, fifth and sixth partial surfaces, etc., are then bent up to an angle of 90° g., of the first and second partial surfaces, respectively, around a bending edge running in one of the parallel trapezoidal sides.In a particularly preferred embodiment, the frame elements are manufactured from a steel sheet. In order to meet the requirements with respect to stability or vibration behavior, a steel sheet having a thickness in the range from 10 mm to 15 mm, preferably 12 mm, is used.In embodiments of the invention, when the frame elements are arranged in their final relative position to one another, the third and the fifth sub-surfaces are arranged opposite parallel to one another and the fourth and the sixth sub-surfaces are also arranged opposite parallel to one another. In other words, in a preferred embodiment of the support frame, a partial surface of the first frame element and a partial surface of the second frame element are always arranged parallel to one another and opposite one another. Opposite, it is to be understood here that the parallel partial surfaces at least largely overlap or are in registration.If the first and the second frame element are joined together to form the supporting frame, the third and the sixth partial surface abut one another and together form a curved inner surface of the supporting frame. The fourth and the fifth partial surface also adjoin one another and together form a curved outer surface of the supporting frame. The inner surface of the supporting frame here denotes that part of the lateral surface of the supporting frame which, with respect to the imaginary circle on the circumference of which the longitudinal axis of the supporting frame runs, runs closer to the center of the circle. The outer surface accordingly denotes that part of the lateral surface which is at the greatest distance from the center of the circle.As already indicated further above, depending on the number of trapezoidal surface segments of a frame element, the partial surfaces of the first and second frame elements bent over the first or second partial surface are arranged next to or behind one another or nested one inside the other and thus form the inner surface and outer surface of the support frame with an exact fit. In this respect, the dimensions of the trapezoidal surface segments and of the bent-over partial surfaces are matched to one another in such a way that they together form the closed lateral surface of the supporting frame in the joined-together position.In order to further simplify the joining process, in particular welding of the two frame elements, the trapezoidal surface segments of the first and second partial surface each comprise at least one positioning groove and the third, fourth, fifth and sixth partial surface each comprise at least one positioning lug, wherein one positioning lug engages in each case in a positioning groove. In other embodiments, only one or a few positioning grooves or one or a few corresponding positioning lugs can also be provided per frame element. Positioning grooves and positioning noses facilitate the correct positioning of first and second frame elements, wherein a positioning nose of the first frame element engages with a positioning groove of the second frame element and vice versa, respectively, when the first and the second frame element assume their final relative position with respect to each other. In addition, these also ensure a certain hold for the first and second frame elements in their desired relative position. Positioning grooves and positioning lugs accelerate and simplify the mounting of the supporting frame in this way.In order to achieve a stable connection between the first and second frame elements, in embodiments of the curved support frame the first and second frame elements are connected by means of a welded connection. In this case, the welded connection can comprise a continuous, i.e. uninterrupted, welded seam between the mutually adjoining partial surfaces of the first and second frame elements. Alternatively, the welded joint may comprise individual shorter welds each covering only a portion of the contact lines between adjacent sub-surfaces. In still other embodiments, the weld joint may comprise substantially one-dimensional weld points with which a connection is established between adjacent sub-surfaces. Mixed forms at different welded connections are also conceivable in embodiments. The choice of a suitable shape for the welded connection is predominantly directed to the mechanical stability which the supporting frame must achieve in the joined state.Overall, according to the invention, the time required for producing the welded connections is reduced by reducing the number of parts to be connected, since overall less welding has to be carried out. In addition, a welding distortion of the supporting frame is thus also reduced.The above-described characteristics, features and advantages of this invention and the manner in which these are achieved become clearer and more clearly comprehensible in conjunction with the following description of the exemplary embodiments, which are explained in more detail in conjunction with the drawings. This description does not limit the invention to these exemplary embodiments. In different figures, identical components are provided with identical reference numerals. The figures are generally not to scale. The following are shown: FIG. 1 shows a view of a medical imaging system in the form of an angiography system according to an embodiment of the present invention, the support arm of which is formed with a support frame according to the invention, FIG. 2 shows a perspective illustration of a supporting frame according to the invention in an embodiment of the invention in a state joined by means of a welded connection, FIG. 3 shows a perspective detailed view of the supporting frame according to FIG. 2, wherein the second frame element is shown, FIG. 4 is another perspective view of the second frame member of FIG. 3, FIG. 5 is a side view of the supporting frame according to FIG. 2, and FIG. 6 shows a cross-sectional illustration of the supporting frame according to FIG. 2.FIG. 1 shows a view of a medical imaging system in the form of an angiography system 100 according to an embodiment of the present invention, the support arm 10 of which is formed with a support frame TR according to the invention. The angiography system 100 comprises a ground stand 40, by means of which it is fixed and supported in a fixed manner on the ground. Alternatively, the angiography system can also be mounted on a room ceiling via a ceiling stand. On the stand 40, a support arm 10 of the angiography system 100 is arranged rotatably about the shaft axis by means of a transmission shaft, so that the support arm 10 can be swung away relative to the stand 40. At the other end of the support arm, an intermediate carriage 20 of the angiography system 100 is again rotatably arranged by means of a second gear shaft. The C-arm 30 of the system is positioned in the intermediate carriage so as to be orbitally displaceable, at the ends of which an X-ray source 32 and an X-ray detector 31 are arranged. Via the three described degrees of freedom between stand 40 and C-arm 30, the imaging components X-ray source 32 and X-ray detector 31 can be pivoted very flexibly around the isocenter ISO of the system for an X-ray image data acquisition, so that arbitrary body regions of a patient can be imaged from arbitrary viewing directions.As already indicated, in the embodiment shown here the support arm 10 comprises a support frame TR according to the invention, as will be described in more detail with reference to the further figures.In further embodiments of an angiography system 100 according to the invention, which are not shown in more detail, however, the C-arm 30 or the intermediate carriage 20 can also be formed comprising a supporting frame TR according to the invention.The supporting frame TR is a curved supporting frame, i.e. its longitudinal axis LA runs substantially orbitally, that is to say along a circular path. In the present case, the course of the curved longitudinal axis LA deviates slightly from an ideal orbital path, as will be explained in more detail further below. The supporting frame TR has a rectangular cross section in the present case and is in the form of a hollow body with a closed lateral surface comprising an inner surface IF, an outer surface AF and two opposite, planar side surfaces SF. The inner surface IF is arranged closer to the isocentre ISO of the angiography system 100 compared to the outer surface AF. Inner and outer surfaces IF, AF connect the two side surfaces SF to one another. While the side surfaces SF are formed in one piece and in each case planar, in this case parallel and substantially identically to one another in terms of area, the inner and outer surfaces IF, AF are formed by individual partial surfaces, which will be discussed in more detail further below. Individual partial surfaces forming the inner and outer surfaces IF, AF and arranged correspondingly opposite one another are likewise parallel and largely in alignment, but not identically in surface area.The support frame TR shown is constructed from only two parts, namely a first frame element RE 1 and a second frame element. RE2. The two frame elements RE 1, RE 2 together form the closed lateral surface of the supporting frame TR.FIG. 2 shows a detailed perspective illustration of a supporting frame TR according to the invention in an embodiment of the invention in a state joined by means of a welded connection SV.In other words, the supporting frame TR is produced in the present case by the first and the second frame element RE 1, RE 2 being welded to one another. The first and second frame elements RE 1, RE 2 are made from steel sheets for this purpose. The welded joint SV is formed in this embodiment as a plurality of discontinuous welded seams which are set on contact sides between mutually adjoining partial surfaces of the first and second frame elements RE 1, RE 2. However, the contact sides lying in the inner surface IF and the outer surface AF are not welded. In order to be able to stably accommodate a transmission shaft, a flange plate FP is provided at least in one partial surface, which is likewise welded on circumferentially from the outside.FIG. 3 shows a perspective detailed view of the supporting frame TR according to FIG. 2, wherein the second frame element RE 2 is shown. FIG. 4 is another perspective view of this second frame member RE2. The second frame element RE 2 is also to be understood here in principle as representative for illustrating the structure of the first frame element RE 1. Accordingly, the first frame element RE 1 comprises a first partial surface TF 1 and the second frame element RE 2 comprises a second partial surface TF 2, wherein the first and the second partial surface TF 1 and TF 2 form mutually opposite parallel side surfaces SF of the supporting frame TR. The first and second partial surfaces TF 1, TF 2 are each divided into at least two trapezoidal surface segments or comprise these. In concrete terms, partial surface TF 2 is divided in the present case into four trapezoidal surface segments TFFS 1, TFFS 2, TFFS 3, TFFS 4, the mutually adjoining limbs of which are illustrated by the dashed lines.The curvature of the supporting frame TR is realized in that the mutually adjoining limbs of the adjacent trapezoids are set at an angle to one another, namely at an angle between 160° and 167°. By means of the four trapezoidal surface segments TFFS 1, TFFS 2, TFFS 3, TFFS 4, the second partial surface TF 2 forming a side surface SF of the supporting frame TR is consequently formed integrally.It can be seen in particular from FIG. 4 that the second frame element RE 2 comprises at least one fifth and sixth partial surface TF 5, TF 6, which each extend perpendicularly from the second partial surface TF 2. Specifically, the second frame element RE 2 also comprises further ninth and tenth partial surfaces TF 9, TF 10, which are likewise perpendicular to the second partial surface TF 2. Analogously, the first frame element RE 1 comprises at least a third and a fourth, a seventh and an eighth partial surface TF 3, TF 4, TF 7, TF 8, which each extend perpendicularly from the first partial surface TF 1. The partial surfaces TF 5, TF 6, TF 9 and TF 10 are arranged in such a way that they do not touch each other.In order to be precise, it can be seen from the illustration of FIG. 4 that the fifth, sixth, ninth and tenth surface portions TF 5, TF 6, TF 9, TF 10 are each connected to one of the trapezoidal surface segments TFFS 1, TFFS 2, TFFS 3, TFFS 4 of the second surface portion TF 2 and have a lateral offset with respect to one another. It can also be clearly seen that the second frame element, as well as the first frame element RE 2, RE 1, are designed as bending plates. In this case, the frame element is first laser-cut from a flat, planar sheet metal and then bent at bending edges corresponding to parallel sides of the trapezoidal surface segments TFFS 1, TFFS 2, TFFS 3, TFFS 4.An analogous construction results, as it were, for the first frame element RE 1.The offset of the subareas TF 3 to TF 10 extending perpendicularly from the first or second subareas TF 1, TF 2 enables the individual subareas TF 3 to TF 10 to be arranged offset or nested between one another in an accurately fitting manner when the two frame elements RE 1, RE 2 assume their final relative position with respect to one another. In this way, it follows that the third and the fifth partial surface TF 3, TF 5, the fourth and the sixth partial surface TF 4, TF 6, the seventh and the ninth partial surface TF 7, TF 9 and the eighth and the tenth partial surface TF 8, TF 10 are each situated opposite and parallel to one another. This is clearly visible in FIG. 5.Accordingly, the fifth, fourth ninth and eighth partial surfaces TF 5, TF 4, TF 9, TF 8 adjoin one another and jointly form the curved outer surface AF of the supporting frame TR, while the third, sixth, seventh and tenth partial surfaces TF 3, TF 6, TF 7 and TF 8 likewise adjoin one another and jointly form the curved inner surface IF of the supporting frame TR.In order to position the first and the second frame element RE 1, RE 2 reliably and stably, in particular for the welding process, the trapezoidal surface segments TFFS 1, TFFS 2, TFFS 3, TFFS 4 each have at least one positioning groove PNU and the third to tenth partial surface TF 3 to TF 10 each have at least one positioning nose PNA, wherein in each case one positioning nose PNA engages in a positioning groove PNU when the two frame elements RE 1, RE 2 have assumed their final relative position to one another. The positioning projections and positioning grooves PNA, PNU effect a fixing of the mutually adjoining partial surfaces until they have been welded along the contact lines.FIG. 5 shows a side view of the supporting frame TR according to FIG. 2.FIG. 6 shows a cross-sectional illustration of the supporting frame TR according to FIG. 2.The focus of the figures is here on the dimensions selected for the individual subareas of the frame elements RE 1, RE 2.The total length LG of the supporting frame TR in the present case amounts to 1572 mm, the width BTF2 of the second partial surface TF2, and analogously also of the first partial surface TF1 amounts to 188 mm. The lengths LTF5, LTF4, LTF9, LTF8 of the subareas TF5, TF4, TF9, TF8 vary slightly and amount to 497 mm, 411 mm, 406 mm and 333 mm. The curvature angles α, β, γ between the trapezoidal surface segments TFFS 1, TFFS 2, TFFS 3, TFFS 4 amount to 160°, 165° and 167°. In FIG. 6, the width BTF8 of the eighth partial area TF8, which amounts to 295 mm, is additionally illustrated. This is also identical for the further subareas TF 3 to TF 10. The steel sheet used for the supporting frame TR has a material thickness D of 12 mm.Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by this embodiment. Other variations can be derived herefrom by the person skilled in the art without departing from the scope of protection of the invention.Regardless of the grammatical sex of a certain term, individuals with male, female or other sex identity are included.

Claims

Curved supporting frame (TR) for an angiography system (100), which is designed as a hollow body, comprising a first and a second frame element (RE1, RE2), wherein the first and the second frame element (RE1, RE2) together form a closed lateral surface of the supporting frame (TR), wherein the first frame element (RE1) comprises a first partial surface (TF1) and the second frame element (RE2) comprises a second partial surface (TF2), wherein the first and the second partial surface (TF1, TF2) form mutually opposite parallel side surfaces (SF) of the supporting frame (TR), wherein the first and the second partial surface (TR) each comprise at least two trapezoidal surface segments (TFFS1, TFFS2, TFFS3, tffs4), wherein adjacent trapezoidal surface segments (TFFS1, TFFS2, TFFS3, TFFS4) of the first and / or of the second sub-surface (TF1, TF2) are arranged with respect to one another at an angle in the range from 155° to 175°.The curved support frame (TR) according to claim 1, wherein the curvature extends along the longitudinal axis (LA) of the support frame (TR).Curved supporting frame (TR) according to one of the preceding claims, wherein the first frame element (RE1) comprises at least a third and a fourth sub-surface (TF3, TF4, TF7, TF8) which each extend perpendicularly from the first sub-surface (TF1) and the second frame element (RE2) comprises at least a fifth and a sixth sub-surface (TF5, TF6, TF9, TF10) which each extend perpendicularly from the second sub-surface (TF2).Curved supporting frame (TR) according to Claim 3, wherein the third and fourth surface elements (TF3, TF4) are each connected to one of the trapezoidal surface segments of the first surface element (TF1), and the fifth and sixth surface elements (TF5, TF6) are each connected to one of the trapezoidal surface segments (TFFS1, TFFS2) of the second surface element (TF2).The curved support frame (TR) according to any one of claims 3 or 4, wherein the third and fifth sub-surfaces (TF3, TF5) are arranged opposite parallel to each other and the fourth and sixth sub-surfaces (TF4, TF6) are arranged opposite parallel to each other.The curved support frame (TR) according to any one of claims 3 to 5, wherein the third and sixth sub-surfaces (TF3, TF6) are adjacent to each other and jointly form a curved inner surface (IF) of the support frame (TR), and the fourth and fifth sub-surfaces (TF4, TF5) are adjacent to each other and jointly form a curved outer surface (AF) of the support frame (TR).Curved supporting frame (TR) according to one of Claims 3 to 6, wherein the trapezoidal surface segments (TFFS1, TFFS2, TFFS3, TFFS4) each comprise at least one positioning groove (PNU) and the third, fourth, fifth and sixth partial surface (TF3, TF4, TF5, TF6) each comprise at least one positioning nose (PNA), wherein in each case one positioning nose (PNA) engages in a positioning groove (PNU).The curved support frame (TR) according to any of the preceding claims, wherein the first and second frame elements (RE1, RE2) are connected by means of a welded connection (SV).Curved supporting frame (TR) according to one of the preceding claims, wherein the first and the second frame element (RE1, RE2) are designed as bending plates.Angiography system (100) comprising a support frame (TR) according to one of Claims 1 to 9.Angiography system (100) according to claim 10 comprising a C-arm (30), wherein the C-arm (30) of the angiography system (100) comprises the support frame (TR).Angiography system (100) according to claim 10, wherein the support arm (10) of the angiography system (100) comprises the support frame (TR).

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