Bed and medical imaging device
By installing a first support device and a second support device under the bed, a stable support structure is provided, which solves the positioning deviation problem caused by bed vibration and improves the imaging quality of medical imaging equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GE PRECISION HEALTHCARE LLC
- Filing Date
- 2025-06-23
- Publication Date
- 2026-08-04
AI Technical Summary
When the bed of a medical imaging device is moving while carrying the object being examined, it is prone to vibration due to gravity, which can lead to positioning deviations and affect imaging quality.
A first support device and a second support device are installed under the bed to provide first support and elastic second support, thereby reducing the vibration amplitude of the bed in the vertical direction and enhancing stability.
By reducing bed vibration, positioning deviations of the detector module can be avoided, thereby improving the imaging quality of the imaging equipment.
Smart Images
Figure CN224584777U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of imaging equipment technology, and more particularly to a bed and a medical imaging device. Background Technology
[0002] Medical imaging equipment is used to scan objects (such as patients or workpieces) in a non-invasive or non-destructive manner to obtain images of the internal structures of anatomical tissues or parts of interest in the object being examined, in order to assist in diagnosis.
[0003] Medical imaging equipment typically includes a circular scanning aperture for the entry and exit of the object being scanned, and a detector subsystem mounted along the entire circumference or a portion of the arc of the aperture. This detector subsystem includes multiple detector modules mounted on a gantry, and a bed for supporting the object as it is progressively moved through the scanning area of the medical imaging equipment. For example, computed tomography (CT) equipment is commonly used as a medical imaging device to scan patients to obtain tomographic medical images of areas of interest to aid physicians in diagnosis.
[0004] CT equipment also includes a computer subsystem that reconstructs medical tomographic images based on processed electrical signals to generate diagnostic aids.
[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this application and facilitating the understanding of those skilled in the art. Utility Model Content
[0006] The inventors discovered that the bed of a medical imaging device can usually move on a base to move the object to be examined to the appropriate position. When the bed moves on the base, part of the bed moves to the outside of the base, becoming a cantilever structure. Therefore, during the scanning process of the medical imaging device, when the bed carries the object to be examined and moves along a preset trajectory, the bed is prone to vibration in the vertical direction due to the gravity of the object to be examined, causing displacement of the object to be examined. This leads to positioning deviation of the detector module, which adversely affects the imaging quality.
[0007] To address at least one of the aforementioned technical problems or other similar issues, embodiments of this application provide a bed and a medical imaging device. The bed includes a first support device and a second support device, providing first support and elastic second support. During the movement of the examination object while the bed is in use, the vertical vibration amplitude of the bed is reduced, enhancing its stability. Furthermore, in the medical imaging device, this avoids positioning deviations of the detector module caused by the displacement of the examination object, thereby improving the imaging quality of the medical imaging device.
[0008] According to one aspect of the embodiments of this application, a bed body is provided, the bed body comprising:
[0009] The bed board is used to support the object being inspected.
[0010] A support portion is disposed below the bed board, the support portion having a base, and the bed board being movably disposed on the base;
[0011] A first support device is mounted on the base, located between the base and the bed board, and the first support device contacts the bottom surface of the bed board and provides first support; and
[0012] A second support device is installed on the base, located between the base and the bed board, and the second support device contacts the bottom surface of the bed board and provides a flexible second support.
[0013] Therefore, a first support device and a second support device are provided in the bed. During the movement of the bed carrying the object to be examined, the first support and the elastic second support can be provided to the bed, reducing the vibration amplitude of the bed and enhancing the stability of the bed. In turn, in medical imaging equipment, the positioning deviation of the detector module caused by the displacement of the object to be examined is avoided, thereby improving the imaging quality of the medical imaging equipment.
[0014] In some embodiments, the number of second support devices is two or more, located on both sides of the first support device along the width direction of the bed board.
[0015] In some embodiments, the first support device and the second support device are spaced apart by a specific distance along the longitudinal extension direction of the support portion.
[0016] In some embodiments, the second support device includes:
[0017] The bracket is mounted on the base;
[0018] A rotating shaft, which is mounted on the bracket;
[0019] A roller, rotatably fitted around the outer periphery of the rotating shaft and movable axially along the shaft, the outer peripheral surface of the roller contacting the bottom surface of the bed board; and
[0020] A vibration damping component is disposed on the rotating shaft and applies elastic force to the roller so that the outer peripheral surface of the roller contacts the bed board and supports the bed board.
[0021] In some embodiments, the vibration damping component includes at least one of an elastic component and a damper.
[0022] In some embodiments, the second support device further includes:
[0023] A bearing is disposed between the outer diameter of the shaft and the inner diameter of the roller.
[0024] In some embodiments, the roller is cylindrical in shape; or
[0025] The roller is shaped like a cone or a frustum, wherein the vibration damping component abuts against one end of the cone or the frustum.
[0026] In some embodiments, the bottom surface of the bed board includes a central bottom surface and side bottom surfaces extending from both sides of the central bottom surface at a predetermined angle;
[0027] The middle bottom surface is in contact with the first support device;
[0028] The bottom side surface is in contact with the second support device.
[0029] In some embodiments, the first support device includes a fixed roller assembly, wherein the fixed rollers of the fixed roller assembly are in contact with the bed board.
[0030] According to another aspect of the embodiments of this application, a medical imaging device is provided, the medical imaging device comprising:
[0031] The bed as described in any of the above embodiments;
[0032] Radiation detectors; and
[0033] Image reconstruction device,
[0034] The bed carrying the object to be inspected is moved into the scanning space of the scanning gantry.
[0035] The image reconstruction device performs image reconstruction based on the electrical signal generated by the radiation detector to generate a tomographic image of the object under examination.
[0036] Referring to the following description and accompanying drawings, specific implementation methods of the embodiments of this application are disclosed in detail, indicating how the principles of the embodiments of this application can be adopted. It should be understood that the implementation methods of this application are not limited in scope. Within the spirit and scope of the appended claims, the implementation methods of this application include many changes, modifications, and equivalents. Attached Figure Description
[0037] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other implementation methods based on these drawings without creative effort. In the drawings:
[0038] Figure 1 This is a schematic diagram of a CT device according to an embodiment of this application;
[0039] Figure 2 This is a schematic diagram of a CT imaging system according to an embodiment of this application;
[0040] Figure 3 This is a three-dimensional schematic diagram of the bed body according to an embodiment of this application;
[0041] Figure 4 This is a partial schematic diagram of the bed structure viewed along the Z-direction;
[0042] Figure 5 This is a partial schematic diagram of the bed structure viewed along the X direction;
[0043] Figure 6 This is an exploded view of the second support device according to an embodiment of this application;
[0044] Figure 7 This is yet another exploded view of the second support device according to an embodiment of this application;
[0045] Figure 8 This is another exploded view of the second support device according to an embodiment of this application;
[0046] Figure 9 This is another partial schematic diagram of the bed structure viewed along the Z-direction;
[0047] Figure 10 This is another partial schematic diagram of the bed structure viewed along the X direction;
[0048] Figure 11 This is another partial schematic diagram of the bed structure viewed along the Z-direction;
[0049] Figure 12 This is a schematic diagram of a medical imaging device according to an embodiment of this application. Detailed Implementation
[0050] Referring to the accompanying drawings, the foregoing and other features of the embodiments of this application will become apparent from the following description. Specific embodiments of this application are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of the embodiments of this application can be adopted. It should be understood that this application is not limited to the described embodiments; rather, the embodiments of this application include all modifications, variations, and equivalents falling within the scope of the appended claims.
[0051] In the embodiments of this application, the terms "first," "second," etc., are used to distinguish different elements by name, but do not indicate the spatial arrangement or chronological order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one or more of the terms listed in association and all combinations thereof. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.
[0052] In the embodiments of this application, the singular forms "a," "the," etc., including the plural forms, should be broadly understood as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms, unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.
[0053] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. The term "comprising / including" as used herein means the presence of a feature, integral, step, or component, but does not exclude the presence or addition of one or more other features, integrals, steps, or components.
[0054] In various embodiments of this application, "above" and "below" both include the stated number. For example, "two or more" includes two and more than two, and "two or less" includes two and less than two.
[0055] The medical imaging device described in this application is applicable to a variety of medical imaging modalities, including but not limited to computed tomography (CT) imaging devices, positron emission tomography (PET), single-photon emission tomography (SPECT), magnetic resonance imaging (MRI), PET-CT, PET-MR, or any other suitable medical imaging device.
[0056] A system for acquiring medical image data may include the aforementioned medical imaging equipment, a separate computer connected to the medical imaging equipment, or a computer connected to an internet cloud, which is connected via the internet to the medical imaging equipment or a storage device for storing medical images. The imaging method may be implemented independently or in combination by the aforementioned medical imaging equipment, the computer connected to the medical imaging equipment, and the computer connected to the internet cloud. For example, a system for acquiring medical image data may be a CT imaging system, etc.
[0057] Exemplary examples are described below in conjunction with X-ray computed tomography (CT) imaging equipment. Those skilled in the art will understand that embodiments of this application can also be applied to other medical imaging equipment.
[0058] Figure 1 This is a schematic diagram of a CT device according to an embodiment of this application, illustrating the configuration of the CT device 100. Figure 1 As shown, the CT equipment 100 includes a scanning gantry 101 and a bed 102; the scanning gantry 101 has an X-ray source 103 that projects an X-ray beam toward a detector assembly 104 or collimator on the opposite side of the scanning gantry 101. The patient 105 can lie flat on the bed 102 and move into the scanning gantry opening 106 as the bed 102 moves; medical imaging data of the patient 105 can be obtained by scanning with the X-ray source 103.
[0059] Figure 2 This is a schematic diagram of a CT imaging system according to an embodiment of this application, illustrating a block diagram of the CT imaging system 200. Figure 2 As shown, the detector assembly 104 includes multiple detector units 104a and a data acquisition system (DAS) 104b. The multiple detector units 104a sense projected X-rays passing through the object under inspection 105.
[0060] DAS104b converts the collected information into projection data based on the sensing of detector unit 104a for subsequent processing. During the scan that acquires X-ray projection data, the scanning gantry 101 and the components mounted thereon rotate around the rotation center 101c.
[0061] The rotation of the scanning gantry 101 and the operation of the X-ray source 103 are controlled by the control mechanism 203 of the CT imaging system 200. The control mechanism 203 includes an X-ray controller 203a that provides power and timing signals to the X-ray source 103, and a scanning gantry motor controller 203b that controls the rotational speed and position of the scanning gantry 101. The image reconstruction unit 204 receives projection data from the DAS 104b and performs image reconstruction. The reconstructed image is transmitted as input to the computer 205, which stores the image in a mass storage device 206.
[0062] Computer 205 also receives commands and scanning parameters from the operator via console 207. Console 207 has some form of operator interface, such as a keyboard, mouse, voice-activated controller, or any other suitable input device. An associated display 208 allows the operator to view reconstructed images and other data from computer 205. Commands and parameters provided by the operator are used by computer 205 to provide control signals and information to DAS 104b, X-ray controller 203a, and scanning gantry motor controller 203b. Additionally, computer 205 operates patient table motor controller 209, controlling bed 102 to position the subject 105 and scanning gantry 101. Specifically, bed 102 allows the subject 105 to be moved wholly or partially. Figure 1 The scanning rack opening is 106.
[0063] The above illustrations depict devices and systems for acquiring medical imaging data (or medical images or medical image data) according to embodiments of this application, but this application is not limited thereto. Medical imaging devices may be CT equipment, PET-CT, or any other suitable imaging equipment. Storage devices may be located within the medical imaging device, on a server outside the medical imaging device, in a standalone medical image storage system (e.g., PACS, Picture Archiving and Communication System), and / or in a remote cloud storage system.
[0064] Furthermore, medical imaging workstations can be located locally on the medical imaging equipment, meaning they are situated close to the equipment, and both can be located in the same scanning room, radiology department, or within the same hospital. Meanwhile, the medical image cloud platform analysis system can be located away from the medical imaging equipment, for example, in the cloud where it communicates with the equipment.
[0065] As an example, after a medical institution completes an imaging scan using medical imaging equipment, the scanned data is stored in a storage device. A medical imaging workstation can directly read the scanned data and perform image processing through its processor. As another example, a medical image cloud platform analysis system can remotely access medical images stored in the storage device to provide "Software as a Service" (SaaS). SaaS can exist between hospitals, between hospitals and imaging centers, or between hospitals and third-party online medical service providers.
[0066] The above illustrations illustrate medical image scanning. The embodiments of this application will be described in detail below with reference to the accompanying drawings. In the following embodiments, a CT scanner is used as an example for description; however, this description is equally applicable to other medical imaging devices.
[0067] In various embodiments of this application: the X direction is, for example, Figure 1 The scanning gantry 101 or bed 102 shown is in the horizontal or left-right direction; the Y direction is, for example, Figure 1 The vertical direction of the scanning gantry 101 or bed 102 shown; the Z direction is, for example, Figure 1 The direction in which the bed 102 moves into or out of the scanning gantry opening 106, shown is the Z direction, i.e. Figure 1 The front-to-back direction of the scanning gantry 101 and the scanning gantry opening 106 shown. The X direction can also be referred to as the first direction, the Z direction as the second direction, and the Y direction as the third direction.
[0068] Figure 3 This is a three-dimensional schematic diagram of the bed frame according to an embodiment of this application. Figure 3 As shown, the bed frame 300 includes a bed board 301, a support portion 306, a first support device 302, and a second support device 304. The bed board 301 is used to support the object to be inspected (e.g., Figure 1 (105 in the text), for example, the object to be inspected can be supported on the upper surface of the bed board 301. A support portion 306 is disposed below the bed board 301, wherein the support portion 306 has a base 307, and the bed board 301 is movably disposed on the base 307. For example, a horizontal drive device may be provided in the support portion 306. Figure 3 (Not shown), used to drive the bed plate 301 to move along the second direction, thereby adjusting the position of the object to be inspected in the horizontal direction; in addition, a lifting drive device may also be provided in the support part 306 ( Figure 3(Not shown) A first support device 302 is mounted on the base 307, located between the base 307 and the bed board 301, and contacts the bottom surface of the bed board 301 to provide first support 303. A second support device 304 is mounted on the base 307, located between the base 307 and the bed board 301, and contacts the bottom surface of the bed board 301 to provide elastic second support 305.
[0069] Therefore, the bed 300 is provided with a first support device 302 and a second support device 304, which can provide a first support 303 and an elastic second support 305 for the bed 300. During the movement of the bed board 301 carrying the examination object 105, compared with the case of only having the first support device 302, the second support device 304 of this application can provide an elastic second support 305 in addition to the first support 303, thereby reducing the vibration amplitude of the bed board 301 in the vertical direction (Y direction) during the movement, enhancing the stability of the bed board 301, and further reducing the positioning deviation of the detector module caused by the displacement of the examination object due to the vibration of the bed board 301 in the medical imaging equipment, avoiding blurry stripes or ghosting in the scanning image.
[0070] In this application, the number of second support devices 304 may be one or more.
[0071] In some embodiments, there are two or more second support devices 304, such as second support device 304a and second support device 304b, which are located on both sides of the first support device 302 along the width direction (X direction) of the bed board 301. For example, the second support device 304a and the second support device 304b are respectively disposed on the left and right sides of the bottom surface 301a of the bed board 301.
[0072] Figure 4 This is a partial schematic diagram of the bed structure viewed along the Z-direction. For example... Figure 4 As shown, the bottom surface 301a of the bed board 301 includes a middle bottom surface 3011, a side bottom surface 3012 extending from the left side of the middle bottom surface 3011 at an angle a1, and a side bottom surface 3013 extending from the right side of the middle bottom surface 3011 at an angle a2. The middle bottom surface 3011 is in contact with the first support device 302, the side bottom surface 3012 is in contact with the second support device 304a, and the side bottom surface 3013 is in contact with the second support device 304b.
[0073] Therefore, by placing the second support device 304a and the second support device 304b in the space below the side bottom surfaces 3012 and 3013 of the bed board 301, the inclined space of the side of the bed board can be fully utilized; and, as Figure 3 and Figure 4 As shown, the height of the space below the side bottom surfaces 3012 and 3013 is greater than the height of the space below the middle bottom surface 3011, which allows the second support device to have a larger size (for example, the rollers and vibration damping components of the second support device can have a larger size), thereby achieving better support and vibration reduction effects.
[0074] In some examples, the first support device 302, the second support device 304a, and the second support device 304b can be fixed to the base 307 with screws.
[0075] Figure 5 It is observed along the X direction. Figure 3 A partial schematic diagram of the bed frame. (See attached diagram.) Figure 5 As shown, the first support device 302 and the second support device 304 are spaced apart by a distance D1 along the longitudinal extension direction (Z direction) of the support portion 306, wherein, Figure 5 The second support device 304 is Figure 4 The second support devices 304a and 304b are shown.
[0076] Therefore, the first support device 302 and the second support device 304 are staggered by a certain distance, which can more stably support the bed board 301.
[0077] For example, the second support device 304 is disposed on one side of the first support device 302 along the longitudinal extension direction of the support portion (positive direction of the Z direction). That is, the second support device 304 is closer to the scanning frame 101 than the first support device 302. It is used to provide better elastic support for the suspended area 3014 of the bed board 301 when the bed board 301 is moved into the scanning frame 101 along the positive direction of the Z direction, so as to enhance the vibration reduction effect on the bed board 301.
[0078] For example, the second support device 304 may also be provided on the side of the first support device 302 that extends in the opposite direction (the negative direction of the Z direction) along the longitudinal length of the support portion.
[0079] The second support device 304 of the bed 300 will be further described below.
[0080] Figure 6 This is an exploded view of the second support device according to an embodiment of this application. Figure 7 This is another exploded view of the second support device according to an embodiment of this application. Figure 8 This is another exploded view of the second support device according to an embodiment of this application. Figures 6-8 Taking the second support device 304b as an example, the second support device 304a and the second support device 304b have the same structure.
[0081] like Figure 4 and Figure 6 As shown, the second support device 304b includes: a bracket 601, a rotating shaft 602, a roller 603, a vibration damping component 604, and a bearing 605. The bracket 601 is mounted on the base 307, for example, by fasteners such as screws. The rotating shaft 602 is mounted on the bracket 601, for example, the rotating shaft 602 can be tilted relative to the Y direction (e.g.,...). Figure 9 (As shown). The roller 603 is rotatably sleeved on the outer periphery of the rotating shaft 602 and can move along the axial direction of the rotating shaft 602 (e.g., Figure 6 As shown in the P direction, the roller 603 moves, and its outer peripheral surface contacts the side bottom surface 3013 of the bed plate 301. A vibration damping component 604 is disposed on the rotating shaft 602 and applies a spring force F1 to the roller 603, causing the outer peripheral surface of the roller 603 to contact and support the bed plate 301. A bearing 605 is disposed between the outer diameter of the rotating shaft 602 and the inner diameter of the roller 603.
[0082] In some examples, there may be two bearings 605, such as bearing 605a and bearing 605b. Bearing 605a is located at the upper end 603a of roller 603, and bearing 605b is located at the lower end 603b of roller 603, in contact with the upper end 604a of vibration damping component 604.
[0083] In some embodiments, the vibration damping component 604 includes at least one of an elastic component and a damper, wherein the elastic component can dampen vibrations through elastic deformation, and the damper can dampen vibrations by absorbing the energy of the vibrations. The elastic component is, for example, a helical spring, which is sleeved on the outer periphery of the rotating shaft 602. The damper uses air or liquid as the damping medium, for example, to absorb the energy of the vibrations.
[0084] In some examples, the roller is shaped like a frustum, and the vibration damping component rests against one end of the roller.
[0085] For example, such as Figure 6 As shown, the roller 603 is shaped like a frustum. The diameter of the upper end 603a of the roller 603 is smaller than the diameter of the lower end 603b of the roller 603. The upper end 604a of the vibration buffer component 604 abuts against the lower end 603b of the roller 603. The outer diameters of the bearings 605a and 605b are smaller than the inner diameters of the roller 603, and the inner diameters of the bearings 605a and 605b are larger than the outer diameters of the rotating shaft 602.
[0086] When the roller 603 moves downward along the direction of the shaft 602, it applies a downward force (opposite to force F1) to the vibration damping component 604. The vibration damping component 604 then applies force F1 to the roller 603 (e.g., the force generated when the elastic component is deformed by the roller 603, or the resistance generated by the damper), pushing the roller 603 upward along the shaft 602. When the roller 603 moves upward and returns to its initial position, the force between the roller 603 and the vibration damping component 604 gradually decreases to 0.
[0087] In other examples, the roller is cone-shaped, and the vibration damping component rests against one end of the roller.
[0088] For example, such as Figure 7 As shown, the roller 703 is conical in shape. The diameter of the upper end 703a of the roller 703 is smaller than the diameter of the lower end 703b of the roller 703, and is close to the outer diameter of the rotating shaft 602. The upper end 604a of the vibration damping component 604 abuts against the lower end 703b of the roller 703. The outer diameter of the bearing 705a is smaller than the inner diameter of the upper end 703a of the roller 703, and the outer diameter of the bearing 705b is smaller than the inner diameter of the lower end 703b of the roller 703. The inner diameters of the bearings 705a and 705b are larger than the outer diameter of the rotating shaft 602. The force between the roller 703 and the vibration damping component 604, and the process of moving along the rotating shaft 602 in the P direction, are the same as those of the roller 603.
[0089] In some other examples, the roller is cylindrical in shape, and the vibration damping component rests against one end of the roller.
[0090] For example, such as Figure 8 As shown, the roller 803 is cylindrical in shape. The diameter of the upper end 803a and the lower end 803b of the roller 803 are the same. The upper end 604a of the vibration damping component 604 abuts against the lower end 803b of the roller 803. The outer diameters of the bearings 805a and 805b are smaller than the inner diameter of the roller 803, and the inner diameters of the bearings 805a and 805b are larger than the outer diameter of the rotating shaft 602. The force between the roller 803 and the vibration damping component 604, and the process of moving along the rotating shaft 602 in the P direction, are the same as those of the roller 603.
[0091] The shapes of the rollers 603, 703, and 803 of the second support device 304a and the second support device 304b are conducive to making full use of the inclined space on the side of the bed board 301 and providing an upward elastic second support for the bed board 301. In addition, the diameter of the lower region of rollers 603 and 703 is larger than the diameter of the upper region (for example, the thickness of the lower region is greater than the thickness of the upper region), which helps to disperse the stress when the rollers bear the bed board 301 and extend the service life of the rollers.
[0092] In some cases, there is a gap G between the side of the roller 603 and the bracket 601 (e.g. Figure 4 (As shown), to avoid the bracket 601 from contacting the roller 603 and thus creating resistance to the movement of the roller 603.
[0093] The first support device 302 of the bed 300 will be further described below.
[0094] like Figure 4 As shown, the first support device 302 can be a fixed roller assembly, which can be fixedly mounted on the base 307 using screws or other mounting components. The fixed rollers 302a of the fixed roller assembly remain in a fixed position and contact the middle bottom surface 3011 of the bed board 301, providing an upward supporting force to the bed board 301.
[0095] Furthermore, this application is not limited to this; the first support device 302 may also be a movable roller assembly. Figure 4 (Not shown), for example, the moving roller assembly may have an elastic member (e.g., a torsion spring) and a moving roller, wherein the elastic member provides a force to the moving roller, causing the moving roller to abut against the middle bottom surface 3011 of the bed board 301, providing an upward supporting force to the bed board 301.
[0096] The following further explains the support provided by the first support device 302 and the second support device 304 to the bed board 301 when the inspection object 105 is moved into the scanning frame opening 106.
[0097] Figure 9 This is another partial schematic diagram of the bed structure viewed along the Z-direction. The diagram shows the stress on the first support device 302 and the second support device 304 when the bed board 301 supports the inspection object 105. (As shown...) Figure 7 As shown, the bed board 301 is subjected to the gravity of the inspection object 105 and the gravity of the bed board 301 itself, and the bottom surface 301a of the bed board 301 is in contact with the surfaces of the first support device 302 and the second support device 304.
[0098] For example, the side bottom surfaces 3012 and 3013 of the bed board 301 are in contact with the surfaces of the second support device 304a and the second support device 304b, and the middle bottom surface 3011 of the bed board 301 is in contact with the surface of the first support device 302.
[0099] When the side bottom surfaces 3012 and 3013 of the bed board 301 contact the surfaces of the second support device 304a and the second support device 304b, taking the second support device 304b as an example (the second support device 304a and the second support device 304b provide the same second support), the side bottom surface 3013 of the bed board 301 applies a vertically downward force F2 to the roller 603. Force F2 can be decomposed into a force F22 in the direction of the rotating shaft 602 (P direction) and a force F21 in the direction perpendicular to the rotating shaft 602. The roller 603, under the action of force F2, moves downward along the rotating shaft 602 in the P direction, applying a force F22 in the P direction to the vibration buffer member 604. After being subjected to force, the vibration buffer member 604 generates a force opposite to force F22, which counteracts force F22, thereby providing an elastic second support to the bed board 301 to buffer the vibration of the bed board 301 and enhance the stability of the bed board 301.
[0100] When the middle bottom surface 3011 of the bed board 301 contacts the surface of the first support device 302, the middle bottom surface 3011 of the bed board 301 applies a downward force F3 in the Y direction to the fixed roller 302a of the first support device 302. The first support device 302 provides a first support force to the middle bottom surface 3011 of the bed board 301 in the opposite direction to the force F3. This first support force can counteract a portion of the force F3.
[0101] For example, the first support device 302 adopts a fixed roller 302a structure, and the fixed roller 302a provides a first support to the middle bottom surface 3011 of the bed board 301 in the opposite direction to the force F3.
[0102] For example, the first support device 302 adopts a movable roller assembly (not shown in the figure) structure. The elastic component of the movable roller assembly provides an upward force to the movable roller, which provides a first support to the middle bottom surface 3011 of the bed board 301 in the opposite direction to the force F3.
[0103] In some other embodiments of this application, the second support device 304 is disposed in the middle region of the bottom surface 301a of the bed board 301 along the first direction (X direction).
[0104] Figure 10 This is another partial schematic diagram of the bed structure viewed along the X direction. Figure 11 Another partial schematic diagram of the bed structure viewed along the Z-direction. (See diagram below.) Figure 10 As shown, viewed along the X direction, the second support device 304 is located in front of the first support device 302 along the longitudinal extension direction (Z direction) of the support portion 306. In the Z direction, the first support device 302 and the second support device 304 are spaced apart by a distance D2. Viewed along the Z direction, as... Figure 11 As shown, the first support device 302 and the second support device 304 are both located below the middle bottom surface 3011 of the bed board 301.
[0105] Therefore, by providing elastic support by setting a second support device 304 in the front region of the first support device 302, the vibration amplitude of the bed board 301 in the vertical direction (Y direction) during movement can be reduced, thereby enhancing the stability of the bed board 301.
[0106] exist Figure 10 , Figure 11 In the example, the number of second support devices 304 is one, but this application is not limited to this. For example, in other examples, two or more second support devices 304 may be provided in the middle region of the bottom surface 301a of the bed board 301 along the first direction (X direction) (e.g., below the middle bottom surface 3011), and these second support devices 304 may be distributed along the Z direction.
[0107] This application also provides a medical imaging device.
[0108] Figure 12 This is a schematic diagram of a medical imaging device according to an embodiment of this application. Figure 12 As shown, the medical imaging device 1200 includes Figure 3 The image shows a bed 300, a radiation detector 1201, and an image reconstruction device 1202. The bed 300, carrying the object 105 to be examined, is moved into the scanning space of the scanning gantry 101. The image reconstruction device 1202 performs image reconstruction based on the electrical signals generated by the radiation detector 1201 to generate a tomographic image of the object 105. For a detailed description of the image reconstruction device 1202, please refer to related technologies.
[0109] The medical imaging device 1200 of this application is, for example, a CT (computed tomography) imaging device, an MR (magnetic resonance) imaging device, a PET-CT imaging device, a non-destructive testing (NDT) computed tomography imaging device, or any other suitable imaging device.
[0110] The medical imaging device 1200 of this application has a high stability of the bed 300, which can avoid the positioning deviation of the detector module in the radiation detector 1201 due to the displacement of the object being examined, thereby improving the imaging quality.
[0111] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.
[0112] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the principles thereof, and these modifications and variations are also within the scope of the present application.
Claims
1. A bed frame, characterized in that, The bed body includes: The bed board is used to support the object being inspected. A support portion is disposed below the bed board, the support portion having a base, and the bed board being movably disposed on the base; A first support device is mounted on the base, located between the base and the bed board, and the first support device contacts the bottom surface of the bed board and provides first support; and A second support device is installed on the base, located between the base and the bed board, and the second support device contacts the bottom surface of the bed board and provides a flexible second support.
2. The bed frame according to claim 1, characterized in that, The number of the second support devices is two or more, located on both sides of the first support device along the width direction of the bed board.
3. The bed frame according to claim 1, characterized in that, The first support device and the second support device are spaced apart by a predetermined distance along the longitudinal extension direction of the support portion.
4. The bed frame according to claim 1, characterized in that, The second support device includes: The bracket is mounted on the base; A rotating shaft, which is mounted on the bracket; A roller, rotatably fitted around the outer periphery of the rotating shaft and movable axially along the shaft, the outer peripheral surface of the roller contacting the bottom surface of the bed board; and A vibration damping component is disposed on the rotating shaft and applies elastic force to the roller so that the outer peripheral surface of the roller contacts the bed board and supports the bed board.
5. The bed frame according to claim 4, characterized in that, The vibration damping component includes at least one of an elastic component and a damper.
6. The bed frame according to claim 4, characterized in that, The second support device also includes: A bearing is disposed between the outer diameter of the shaft and the inner diameter of the roller.
7. The bed frame according to claim 4, characterized in that, The roller is cylindrical in shape; or The roller is shaped like a cone or a frustum, wherein the vibration damping component abuts against one end of the cone or the frustum.
8. The bed frame according to claim 1, characterized in that, The bottom surface of the bed board includes a central bottom surface and side bottom surfaces extending from both sides of the central bottom surface at a predetermined angle; The middle bottom surface is in contact with the first support device; The bottom side surface is in contact with the second support device.
9. The bed frame according to claim 1, characterized in that, The first support device includes a fixed roller assembly, wherein the fixed rollers of the fixed roller assembly are in contact with the bed board.
10. A medical imaging device, characterized in that, The medical imaging device includes: The bed body as described in any one of claims 1 to 9; Scanning rack; Radiation detectors; and Image reconstruction device, The bed carrying the object to be inspected is moved into the scanning space of the scanning gantry. The image reconstruction device performs image reconstruction based on the electrical signal generated by the radiation detector to generate a tomographic image of the object under examination.