Frame for a gantry of a medical imaging device

Abstract

A frame (22) for a gantry (20) of a medical imaging device (1), comprising a plurality of molded parts, wherein at least a portion of the plurality of molded parts has a planar region, and wherein the plurality of molded parts is configured and connected to one another such that the plurality of molded parts forms a self-supporting hollow structure of the frame (22) and that the planar regions of the portion of molded parts together form an outer surface of the frame (22), wherein the outer surface of the frame (22) is configured such that a tunnel-shaped opening (9) is configured in the frame (22), into which opening a patient (13) can be inserted, - wherein the plurality of molded parts comprises a first funnel-shaped molded part (91) which forms a first portion of the tunnel-shaped opening (9), - wherein the plurality of molded parts comprises a second funnel-shaped molded part (92) which forms a second portion of the tunnel-shaped opening (9), - wherein the first funnel-shaped molded part (91) and the second funnel-shaped molded part (92) merge into one another in the region of their narrow ends, - wherein the plurality of molded parts comprises an annular molded part (9R), the flat area of ​​which has an opening which is formed corresponding to a wide end of the first funnel-shaped molded part (91), - wherein the plurality of molded parts comprises a molded part group, wherein the molded parts of the molded part group are arranged around the tunnel-shaped opening (9) and extend from the annular molded part (9R) on the one hand to a wide end of the second funnel-shaped molded part (92) on the other hand, such that an annular hollow profile (HP) is formed in the frame (22), which annularly surrounds the tunnel-shaped opening (9), - wherein the wide end of the first funnel-shaped molded part (91) has a smaller diameter than the wide end of the second funnel-shaped molded part (92).

Description

[0001] The invention relates to a frame for a gantry of a medical imaging device, a gantry for a medical imaging device and a medical imaging device.

[0002] Medical imaging devices, such as computed tomography devices, typically contain components that must not be readily accessible to the user. These include, in particular, sensitive, high-voltage, or rotating components. A medical imaging device therefore generally has a casing that serves, on the one hand, to protect the user and, on the other hand, to protect the internal components from external influences, at least during one operating state of the medical imaging device. The casing can, for example, be formed from a plurality of flat casing elements, each of which is detachably attached to a support structure. Such a support structure can, in particular, be constructed from interconnected holding elements that are essentially rod-shaped and can, for example, be made of metal.If a panel element is removed, for example for a service call, it may happen that the retaining element behind it makes access difficult and / or creates a source of danger.

[0003] Each of the following documents discloses a cooling system for a gantry of a CT device: US 6988827 B2, US 7374338 B2, US 7393138 B2, US 7410295 B2. Further prior art documents include DE 10 2016 208 328 A1, DE 10 2013 210 534 A1, and CN 103 284 741 A.

[0004] The invention aims to provide improved access to the interior of a gantry of a medical imaging device. Each of the subject matters of the independent claims solves this problem. Further advantageous aspects of the invention are considered in the dependent claims.

[0005] The invention relates to a frame for a gantry of a medical imaging device, comprising a plurality of molded parts, wherein at least a partial number of the plurality of molded parts has a flat region and wherein the plurality of molded parts is designed and connected to one another in such a way that the plurality of molded parts forms a self-supporting hollow structure of the frame, in particular an annular self-supporting hollow structure of the frame, and that the flat regions of the partial number of molded parts together form an outer surface of the frame, wherein the outer surface of the frame is shaped in such a way that a tunnel-shaped opening is formed in the frame, into which opening a patient can be inserted.

[0006] The frame's self-supporting hollow structure eliminates the need for a complex supporting structure inside the gantry. In particular, brackets that directly protrude into the work area of ​​service personnel are eliminated. This reduces the time required and the risk of injury when servicing the gantry. Nesting the molded parts also eliminates or reduces visible gaps in the gantry's exterior surface. Using a small number of relatively large, fully integrated molded parts reduces the time required to assemble the frame.

[0007] The invention provides that the plurality of molded parts comprises a first funnel-shaped molded part which forms a first section of the tunnel-shaped opening.

[0008] The funnel shape has the particular advantage that it can be used to form a large and stable molded part, the removal of which can create a relatively large opening for access to important components of the gantry.

[0009] The invention provides - that the plurality of molded parts comprises a second funnel-shaped molded part which forms a second section of the tunnel-shaped opening, and - that the first funnel-shaped molded part and the second funnel-shaped molded part merge into one another in the region of their narrow ends.

[0010] The invention provides that the plurality of molded parts comprises an annular molded part, the flat area of ​​which has an opening which is formed corresponding to a wide end of the first funnel-shaped molded part.

[0011] One embodiment of the invention provides that the flat region of the annular molded part further comprises at least one first ventilation opening.

[0012] The invention provides that the plurality of molded parts comprise a molded part group, wherein the molded parts of the molded part group are arranged around the tunnel-shaped opening and extend from the annular molded part on the one hand to a wide end of the second funnel-shaped molded part on the other hand, such that an annular hollow profile is formed in the frame, which annularly surrounds the tunnel-shaped opening, wherein the wide end of the first funnel-shaped molded part has a smaller diameter than the wide end of the second funnel-shaped molded part. In particular, the annular hollow profile can have a closed hollow profile cross-section in a half-plane delimited by the axis of rotation.

[0013] An embodiment of the invention provides - that the molded part group comprises a molded part whose flat area has at least one second ventilation opening, and - that the at least one first ventilation opening of the flat region of the annular shaped part and the at least one second ventilation opening of the flat region of the shaped part of the shaped part group are connected to one another by means of the hollow profile in such a way that an air flow can flow between them in the hollow profile.

[0014] One embodiment of the invention provides that the molded parts of the plurality of molded parts are each produced by means of an injection molding process and / or by means of a 3D printing process. In particular, the molded parts can be made of plastic.

[0015] One embodiment of the invention provides that the frame is a tilting frame for the gantry of the medical imaging device.

[0016] The invention further relates to a gantry for a medical imaging device, comprising - a frame according to the invention, - an annular rotor which is arranged in the self-supporting hollow structure of the frame, in particular in the annular hollow profile of the frame, around the tunnel-shaped opening and is rotatably mounted relative to the frame.

[0017] An embodiment of the invention provides - that the rotor is arranged in the self-supporting hollow structure of the frame in such a way that a first cavity and a second cavity are formed in the frame, wherein the rotor forms a rotor-side section of a partition wall between the first cavity and the second cavity, and - that the rotor has at least one air channel through which air can flow between the first cavity and the second cavity.

[0018] An embodiment of the invention provides - that the at least one first ventilation opening of the flat region of the annular molded part is connected to the first cavity in such a way that air can flow into the first cavity through the at least one first ventilation opening of the flat region of the annular molded part, and / or - that the at least one second ventilation opening of the flat region of the molded part of the molded part group is connected to the second cavity in such a way that air can flow into the second cavity through the at least one second ventilation opening of the flat region of the molded part of the molded part group.

[0019] An embodiment of the invention provides that the gantry further comprises an air intake funnel, - wherein a wide end of the air intake funnel is connected to the first ventilation opening of the flat area of ​​the annular molding, - whereby a narrow end of the air intake funnel protrudes into the first cavity.

[0020] An embodiment of the invention provides that the gantry further comprises a fan, - wherein the fan is arranged at the narrow end of the air intake funnel in the first cavity, - wherein the fan is designed to suck in the air through the air intake funnel and to blow the air out into the first cavity.

[0021] The invention further relates to a medical imaging device comprising a gantry according to the invention.

[0022] The medical imaging device can, for example, be selected from the imaging modality group consisting of an X-ray device, a C-arm X-ray device, a computed tomography (CT) device, a molecular imaging (MI) device, a single-photon emission computed tomography (SPECT) device, a positron emission tomography (PET) device, a magnetic resonance imaging (MR) device, and combinations thereof, in particular a PET-CT device and a PET-MR device. The medical imaging device can further comprise a combination of an imaging modality, which is selected, for example, from the imaging modality group, and an irradiation modality. The irradiation modality can, for example, comprise an irradiation unit for therapeutic irradiation.

[0023] Without limiting the general inventive concept, in some of the embodiments a computed tomography device is mentioned as an example of a medical imaging device.

[0024] According to one embodiment of the invention, the medical imaging device comprises an acquisition unit configured to acquire the acquisition data. In particular, the acquisition unit may comprise a radiation source and a radiation detector. One embodiment of the invention provides that the radiation source is configured to emit and / or excite radiation, in particular electromagnetic radiation, and / or that the radiation detector is configured to detect the radiation, in particular electromagnetic radiation.

[0025] The radiation can, for example, travel from the radiation source to an area to be imaged and / or, after interacting with the area to be imaged, to the radiation detector. Upon interaction with the area to be imaged, the radiation is modified and thus becomes a carrier of information relating to the area to be imaged. Upon interaction of the radiation with the detector, this information is recorded in the form of acquisition data. In particular, in a computed tomography device and a C-arm X-ray device, the acquisition data can be projection data, the acquisition unit can be a projection data acquisition unit, the radiation source can be an X-ray source, and the radiation detector can be an X-ray detector. The X-ray detector can, in particular, be a quantum-counting and / or energy-resolving X-ray detector.

[0026] The gantry of a medical imaging device typically has a support structure on which components of the acquisition unit, in particular the radiation source and / or the radiation detector, are arranged. The support structure of the gantry typically has such high rigidity and strength that the components of the acquisition unit can be arranged both relative to one another and relative to a region to be imaged in a geometry sufficiently defined for imaging. In a computed tomography device, the gantry typically has a support frame and a rotor rotatably mounted relative to the support frame, with the radiation source and the radiation detector being arranged on the rotor. Optionally, the gantry can have a tilting frame tiltably mounted relative to the support frame, with the rotor being arranged on the tilting frame.

[0027] 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.

[0028] In addition to the embodiments of the invention expressly described in this application, a wide variety of further embodiments of the invention are conceivable, which a person skilled in the art can arrive at without departing from the scope of the invention, insofar as it is defined by the claims. The use of the indefinite articles “a” or “an” does not exclude the possibility that the feature in question may be present more than once. The use of the expression “comprise” does not exclude the possibility that the terms linked by the expression “comprise” may be identical. For example, the gantry comprises the gantry. The use of the expression “unit” does not exclude the possibility that the object to which the expression “unit” refers may comprise several components that are spatially separated from one another.

[0029] The invention is explained below using exemplary embodiments with reference to the accompanying figures. The representation in the figures is schematic, highly simplified, and not necessarily to scale.

[0030] They show: Fig. 1-3 a frame for a gantry of a medical imaging device, Fig. 4-6 a gantry of a medical imaging device, Fig. 7 a medical imaging device.

[0031] The Fig. 1-3 show a frame 22 for a gantry 20 of a medical imaging device 1 according to an embodiment of the invention, comprising a plurality of molded parts 91, 92, 9R, G1, G2, G3, and G4, each having a planar region. The molded parts 91, 92, 9R, G1, G2, G3, and G4 are configured and interconnected in such a way that they form a self-supporting hollow structure of the frame 22, and the planar regions of these molded parts together form an outer surface of the frame 22. The outer surface of the frame 22 is shaped in such a way that a tunnel-shaped opening 9 is formed in the frame 22, into which a patient 13 can be inserted.

[0032] The first funnel-shaped molded part 91 forms a first section of the tunnel-shaped opening 9. The second funnel-shaped molded part 92 forms a second section of the tunnel-shaped opening 9. The first funnel-shaped molded part 91 and the second funnel-shaped molded part 92 merge into one another in the region of their narrow ends. The first funnel-shaped molded part 91 and the second funnel-shaped molded part 92 each have a rib structure to increase rigidity. The wide end of the first funnel-shaped molded part 91 has a smaller diameter than the wide end of the second funnel-shaped molded part 92. The flat region of the annular molded part 9R has an opening which is designed to correspond to the wide end of the first funnel-shaped molded part 91.

[0033] The molded parts G1, G2, G3 and G4 are arranged around the tunnel-shaped opening 9 and extend from the annular molded part 9R on the one hand to a wide end of the second funnel-shaped molded part 92 on the other hand, such that an annular hollow profile HP is formed in the frame 22, which surrounds the tunnel-shaped opening 9 in a ring-shaped manner. Fig. The frame 22 shown in Figure 1 is a tilting frame that can be tiltably mounted relative to a stationary support frame 21 of the gantry 20 by means of a tilting mounting device. For this purpose, the frame 22 has a suspension 2B, by means of which the frame 22 can be received in the tilting mounting device.

[0034] The molded parts G1 and G2 are connected to each other at the connection points GC, for example, by screwing. By skillfully connecting the individual molded parts to each other, taking into account the flow of forces to maintain rigidity, the screwing points for connecting the molded parts can be reduced to a minimum. The second funnel-shaped molded part 92 can, for example, be connected to the remaining molded parts with just four screwing points. Because several of the molded parts interlock, the frame 22 achieves a high degree of rigidity. The dashed lines in the Fig. 2 illustrate the stiffening effect that the second funnel-shaped molded part 92 (“front funnel”) has on the frame 22. The dashed lines in the Fig. 3 illustrate the stiffening effect that the annular molded part 9R has on the frame 22.

[0035] The Fig. 4-6 show a gantry 20 of a medical imaging device 1. The gantry 20 has the frame 22 and the stationary support frame 21, wherein the frame 22 is arranged tiltably relative to the stationary support frame 21 by means of a tilting bearing device on the stationary support frame 21.

[0036] The flat area of ​​the annular molded part 9R has the first ventilation opening AIP. The flat area of ​​the molded part G1 has a second ventilation opening AOP. The first ventilation opening AIP and the second ventilation opening AOP are connected to one another by means of the hollow profile HP in such a way that an air flow AF can flow between them in the hollow profile HP. This air flow AF can, for example, cool the radiation source 26, the radiation detector 28 and / or another component K of the rotor. The first ventilation opening AIP is connected to the first cavity HC in such a way that the air AIF can flow into the first cavity HC through the first ventilation opening AIP. The second ventilation opening AOP is connected to the second cavity HW in such a way that the air AOF can flow from the second cavity HW out of the frame 22 through the second ventilation opening AOP.

[0037] The gantry 20 has the annular rotor 24, which is arranged in the self-supporting hollow structure of the frame 22 within the hollow profile HP around the tunnel-shaped opening 9 and is rotatably mounted relative to the frame 22. The rotor 24 is arranged in the self-supporting hollow structure of the frame 22 such that a first cavity HC and a second cavity HW are formed in the frame 22. The rotor 24 forms a rotor-side section of a partition wall between the first cavity HC and the second cavity HW and thus divides the hollow profile HP.

[0038] The frame 20 has a first shoulder SL1 and a second shoulder SL2, each of which projects into the hollow profile HP and is arranged in a ring around the tunnel-shaped opening 9. The rotor 24 is connected in a substantially airtight manner to the first shoulder SL1 and the second shoulder SL2. In particular, a gap width of a first gap between the first shoulder SL1 and the rotor 24 and / or a gap width of a second gap between the second shoulder SL2 and the rotor 24 can be designed to be so small and with such close manufacturing tolerances that a leakage air flow through the first gap and / or the second gap is largely avoided. To reduce the gap width, for example, additional metal sheets can be used, which can be arranged on the rotor 24 or on the frame 22. The first shoulder SL1 forms a cross brace, which provides the frame 22 with additional strength and rigidity.The first shoulder SL1 is arranged in the region of an outer circumference of the rotor 24. The second shoulder SL2 is arranged in the region of the rotary bearing device BR.

[0039] The rotor-side section of the partition wall extends between the first cavity HC and the second cavity HW from the first gap to the second gap. The first gap forms a first transition between the first cavity HC and the second cavity HW. The second gap forms a second transition between the first cavity HC and the second cavity HW. The first shoulder SL1 forms a first frame-side section of the partition wall between the first cavity HC and the second cavity HW. The second shoulder SL2 forms a second frame-side section of the partition wall between the first cavity HC and the second cavity HW.

[0040] The rotor 24 has at least one air duct RH through which air can flow between the first cavity HC and the second cavity HW. The at least one air duct RH is designed in particular on and / or in a component arranged on the rotor 24 such that the component can be cooled by the air flow AF flowing through the at least one air duct RH. This air flow AF can, for example, cool the radiation source 26, the radiation detector 28 and / or another component K of the rotor 24. The rotor 24 can furthermore have an air flow adjustment unit RN, which is designed to adjust the air flow AF from the first cavity HC into the second cavity HW through the rotor 24 and can, for example, have a valve and / or another fan.

[0041] The first ventilation opening AIP is connected to the first cavity HC in such a way that air can flow into the first cavity HC through the first ventilation opening AIP. The second ventilation opening AOP is connected to the second cavity HW in such a way that air can flow out of the second cavity HW through the second ventilation opening AOP, in particular into a space surrounding the gantry 20. By integrating the cooling into the hollow profile HP of the frame 22, an additional air duct in the frame 22 can be eliminated.

[0042] The gantry 20 has an air intake funnel AIG. A wide end of the air intake funnel AIG is connected to the first ventilation opening AIP of the flat region of the annular molded part 9R. A narrow end of the air intake funnel AIG protrudes into the first cavity HC. The gantry 20 has a fan AIN. The fan AIN is arranged at the narrow end of the air intake funnel AIG in the first cavity HC and is designed to draw air through the air intake funnel AIG and expel the air into the first cavity HC. In this way, the fans are not positioned directly at the air inlet, but are spaced from the air inlet.

[0043] In terms of air cooling, the first cavity HC forms a cold zone, while the second cavity HW forms a warm zone. The air is guided through the intake funnel AIG from the first ventilation opening AIP, which forms the air inlet, to the fan AIN in a flow-optimized manner. Optionally, the air intake funnel AIG can be made of sound-absorbing material and / or be designed to accommodate a silencer.

[0044] For cooling the Fig. 4-6, it is sufficient to provide fans in the first cavity HC. In particular, it is not necessary to arrange fans in the second cavity HW or on the rotor 24. Since the pressure side of the fan is generally louder than the suction side, this reduces the ventilation noise. The air inlet is located on the rear side of the gantry 20 and thus on a side of the gantry 20 that is generally facing away from the patient 13 and the operating personnel. The second ventilation opening AOP, which forms the air outlet, is located on the top side of the gantry 20 and thus faces away from the patient 13 and the operating personnel.

[0045] The gantry 20 has two fans AIN and two first ventilation openings AIP, which are arranged symmetrically with respect to the rotation axis AR of the rotor 24 to ensure a homogeneous pressure distribution on the pressure side. Each of the two fans AIN is connected to an air intake duct AIG. The cooling air flow path is optimized and the flow path reduced, so that pressure losses are minimal and the fans AIN operate at a noise-reduced operating point.

[0046] The filter for the incoming air is located in the first ventilation opening AIP on the housing surface of the gantry 20. The larger intake surface due to the funnel shape leads to lower pressure losses in the filter and thus to less exposure to fan noise. The air flows out via louvers located in the second ventilation opening AOP on the housing surface of the gantry 20, which acoustically seal off the interior of the frame 22 from the outside. Optionally, the louvers are manufactured or coated with a sound-absorbing material. Alternatively or additionally, the second ventilation opening AOP can be designed to accommodate a silencer.

[0047] The first fans AIN can, in particular, be radial fans. Their natural flow direction, in which the air is blown out at an angle of 90 degrees relative to the intake direction, corresponds to the geometric requirements of the gantry 20. The rotary bearing device BR and the rotary drive are arranged in the first cavity HC. This prevents running and drive noises from escaping to the outside via the second cavity HW and the air outlet, or only in a highly muffled manner. In this way, a significantly quieter overall noise level of the computed tomography device can be achieved, both in the operating state of scan readiness and during a scan. This results in the particular advantage of low noise exposure for the patient 13 and the operating personnel.

[0048] Conventional computed tomography devices can generate a relatively loud background noise, especially if fans are installed near the air inlets, near the air outlets, and also on the rotor. An alternative way to reduce noise pollution is recirculation cooling. The air circulates in a closed circuit and is cooled by a recooler, for example, using water as the cooling medium. This allows for an air circuit that is sealed to the outside, preventing airflow and fan noise from escaping.

[0049] The Fig.7 shows a medical imaging device 1. Without limiting the general inventive concept, a computed tomography device is shown as an example for the medical imaging device 1. The medical imaging device 1 has the gantry 20, the tunnel-shaped opening 9, the patient support device 10, and the control device 30. The gantry 20 has the stationary support frame 21, the tilting frame 22, and the rotor 24. The tilting frame 22 is arranged on the stationary support frame 21 so as to be tiltable relative to the stationary support frame 21 by means of a tilting bearing device. The rotor 24 is arranged on the tilting frame 22 so as to be rotatable about the rotation axis AR relative to the tilting frame 22 by means of a rotary bearing device BR. For this purpose, the rotor 24 has a bearing inner ring RB, which is rotatably mounted in a stationary bearing outer ring SB of the rotary bearing device BR.

[0050] The patient 13 can be inserted into the tunnel-shaped opening 9. The acquisition region 4 is located in the tunnel-shaped opening 9. In the acquisition region 4, a region of the patient 13 to be imaged can be positioned such that the radiation 27 can reach the region to be imaged from the radiation source 26 and, after interacting with the region to be imaged, can reach the radiation detector 28. The patient support device 10 has the support base 11 and the support plate 12 for supporting the patient 13. The support plate 12 is arranged on the support base 11 so as to be movable relative to the support base 11 such that the support plate 12 can be inserted into the acquisition region 4 in a longitudinal direction of the support plate 12, in particular along the system axis AR.

[0051] The medical imaging device 1 is designed to acquire acquisition data based on electromagnetic radiation 27. The medical imaging device 1 has an acquisition unit. The acquisition unit is a projection data acquisition unit with the radiation source 26, e.g., an X-ray source, and the detector 28, e.g., an X-ray detector, in particular an energy-resolving X-ray detector. The radiation source 26 is arranged on the rotor 24 and is designed to emit radiation 27, e.g., X-ray radiation, with radiation quanta 27. The detector 28 is arranged on the rotor 24 and is designed to detect the radiation quanta 27. The radiation quanta 27 can travel from the radiation source 26 to the region of the patient 13 to be imaged and, after interacting with the region to be imaged, impinge on the detector 28.In this way, acquisition data of the area to be imaged can be captured in the form of projection data using the acquisition unit.

[0052] The control device 30 is configured to receive the acquisition data acquired by the acquisition unit. The control device 30 is configured to control the medical imaging device 1. The control device 30 comprises the data processing unit 35, the computer-readable medium 32, and the processor system 36. The control device 30, in particular the data processing unit 35, is formed by a data processing system comprising a computer. The control device 30 comprises the image reconstruction device 34. By means of the image reconstruction device 34, a medical image data set can be reconstructed based on the acquisition data.

[0053] The medical imaging device 1 has an input device 38 and an output device 39, each of which is connected to the control device 30. The input device 38 is designed to input control information, e.g., image reconstruction parameters, examination parameters, or the like. The output device 39 is designed, in particular, to output control information, images, and / or acoustic signals.

Claims

[1] Frame (22) for a gantry (20) of a medical imaging device (1), comprising a plurality of molded parts, wherein at least a partial number of the plurality of molded parts has a flat area and wherein the plurality of molded parts is designed and connected to one another in such a way that the plurality of molded parts forms a self-supporting hollow structure of the frame (22) and that the flat areas of the partial number of molded parts together form an outer surface of the frame (22), wherein the outer surface of the frame (22) is shaped in such a way that a tunnel-shaped opening (9) is formed in the frame (22), into which opening a patient (13) can be introduced, - wherein the plurality of molded parts comprises a first funnel-shaped molded part (91) which forms a first section of the tunnel-shaped opening (9), - wherein the plurality of molded parts comprises a second funnel-shaped molded part (92) which forms a second section of the tunnel-shaped opening (9), - wherein the first funnel-shaped molded part (91) and the second funnel-shaped molded part (92) merge into one another in the region of their narrow ends, - wherein the plurality of molded parts comprises an annular molded part (9R), the flat area of which has an opening which is formed corresponding to a wide end of the first funnel-shaped molded part (91), - wherein the plurality of molded parts comprises a molded part group, wherein the molded parts of the molded part group are arranged around the tunnel-shaped opening (9) and extend from the annular molded part (9R) on the one hand to a wide end of the second funnel-shaped molded part (92) on the other hand, such that an annular hollow profile (HP) is formed in the frame (22), which annularly surrounds the tunnel-shaped opening (9), - wherein the wide end of the first funnel-shaped molded part (91) has a smaller diameter than the wide end of the second funnel-shaped molded part (92). [2] Frame (22) according to claim 1, - wherein the flat region of the annular molded part (9R) further comprises at least one first ventilation opening (AIP). [3] Frame (22) according to claim 2, - wherein the molded part group comprises a molded part whose flat area has at least one second ventilation opening (AOP), - wherein the at least one first ventilation opening (AIP) of the flat region of the annular molded part (9R) and the at least one second ventilation opening (AOP) of the flat region of the molded part of the molded part group are connected to one another by means of the hollow profile (HP) in such a way that an air flow (AF) can flow between them in the hollow profile (HP). [4] Frame (22) according to one of claims 1 to 3, - wherein the molded parts of the plurality of molded parts are each produced by means of an injection molding process and / or by means of a 3D printing process. [5] Frame (22) according to one of claims 1 to 4, - wherein the frame (22) is a tilting frame for the gantry (20) of the medical imaging device (1). [6] Gantry (20) for a medical imaging device (1), comprising - a frame (22) according to one of claims 1 to 5, - an annular rotor (24) which is arranged in the self-supporting hollow structure of the frame (22) around the tunnel-shaped opening (9) and is rotatably mounted relative to the frame (22). [7] Gantry (20) according to claim 6, - wherein the rotor (24) is arranged in the self-supporting hollow structure of the frame (22) in such a way that a first cavity (HC) and a second cavity (HW) are formed in the frame (22), wherein the rotor (24) forms a rotor-side section of a partition wall between the first cavity (HC) and the second cavity (HW), - wherein the rotor (24) has at least one air channel (RH) through which air can flow between the first cavity (HC) and the second cavity (HW). [8] Gantry (20) according to claim 7, - wherein the at least one first ventilation opening (AIP) of the flat region of the annular molded part (9R) is connected to the first cavity (HC) in such a way that air can flow into the first cavity (HC) through the at least one first ventilation opening (AIP) of the flat region of the annular molded part (9R), and / or - wherein the at least one second ventilation opening (AOP) of the flat region of the molded part of the molded part group is connected to the second cavity (HW) in such a way that air can flow out of the second cavity (HW) through the at least one second ventilation opening (AOP) of the flat region of the molded part of the molded part group. [9] Gantry (20) according to claim 8, - further comprising an air intake funnel (AIG), - wherein a wide end of the air intake funnel (AIG) is connected to the first ventilation opening (AIP) of the flat area of the annular molded part (9R), - whereby a narrow end of the air intake funnel (AIG) protrudes into the first cavity (HC). [10] Gantry (20) according to claim 9, - further comprising a fan (AIN), - wherein the fan (AIN) is arranged at the narrow end of the air intake funnel (AIG) in the first cavity (HC), - wherein the fan (AIN) is designed to suck in the air through the air intake funnel (AIG) and to blow the air out into the first cavity (HC). [11] Medical imaging device (1) comprising a gantry (20) according to one of claims 6 to 10.

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