Extension device for scanning bed, scanning bed and medical imaging system

Abstract

The utility model relates to an extension device for a scanning bed, the scanning bed and a medical imaging system. The extension device comprises an extension plate; the buckle assembly is arranged on the extension plate and is configured to be capable of being switched between a locking state and an unlocking state, the buckle assembly comprises a fixing part and a buckle part, the fixing part is rotatably fixed to the extension plate so that the buckle assembly can rotate along a plane parallel to the extension plate, and the buckle part is arranged on the extension plate. The buckling part extends from the fixing part to the scanning bed, and the buckling part is configured to be buckled to the scanning bed in the locking state and unbuckled from the scanning bed in the unlocking state; and the elastic component is configured to provide elastic force so as to enable the buckling part to be kept in the locking state.

Description

Technical Field

[0001] The present disclosure relates to the field of medical imaging, and in particular to an extension device for a scanning table, a scanning table and a medical imaging system. Background Art

[0002] The extender can be mounted to the bed frame of the scanning device to increase the scanning area (for example, for large scanned objects), and is fixed to the edge of the bed frame by a clip, which is fixed to the extender with two screws, such as Fig.12 shown.

[0003] In clinical applications, snap-on fixing screws are prone to loosening after multiple installation and removal. Each action of the snap hook opening and closing transmits tension to the screw, and a large number of extender locking and unlocking operations can cause the fixing screw to fall, break, or shear, which can make the extender unusable. Another problem is that when it hits a hard object or falls to the ground, the snap hook is subjected to impact force, resulting in breakage. Utility Model Content

[0004] The purpose of the present disclosure is to overcome the above-mentioned and / or other problems in the prior art. It provides a new design of an extension device, whose buckle assembly can rotate along a plane parallel to the extension plate to switch between a locked state and an unlocked state, which is beneficial to extending the service life of the extension device.

[0005] According to a first aspect of the present disclosure, an extension device for a scanning bed is provided. The extension device comprises: an extension plate; a buckle assembly, which is arranged on the extension plate and is configured to be switchable between a locked state and an unlocked state, the buckle assembly comprising a fixing portion and a buckle portion, wherein the fixing portion is rotatably fixed to the extension plate so that the buckle assembly can rotate along a plane parallel to the extension plate, the buckle portion extends from the fixing portion to the scanning bed, the buckle portion is configured to be buckled to the scanning bed in the locked state and to be unbuckled from the scanning bed in the unlocked state; and an elastic component, which is configured to provide an elastic force so that the buckle portion remains in the locked state.

[0006] Optionally, the buckle assembly further includes an operating portion, and the operating portion is configured to be pressed by a user to rotate the buckle assembly along a plane parallel to the extension plate.

[0007] Optionally, the buckle assembly includes: a first buckle component, the first buckle component includes a first fixing portion and a first buckle portion; and a second buckle component, the second buckle component includes a second fixing portion and a second buckle portion.

[0008] Optionally, the first fastener is connected to the extension plate via a first screw and can rotate around the first screw along a plane parallel to the extension plate; and / or the second fastener is connected to the extension plate via a second screw and can rotate around the second screw along a plane parallel to the extension plate.

[0009] Optionally, the elastic component is arranged between the first fastener and the second fastener.

[0010] Optionally, the elastic component includes at least one of a spring, rubber and elastic cotton.

[0011] Optionally, when the buckle assembly is in an unlocked state, the elastic component is in a compressed state and provides elastic restoring force to the first buckle component and the second buckle component respectively.

[0012] Optionally, the first fastener further includes a first wing portion inserted into the elastic component, and the second fastener further includes a second wing portion inserted into the elastic component.

[0013] Optionally, one of the first wing and the elastic component includes a first protrusion, and the other of the first wing and the elastic component includes a first groove, and the first protrusion is inserted into the first groove to plug the first wing and the elastic component; one of the second wing and the elastic component includes a second protrusion, and the other of the second wing and the elastic component includes a second groove, and the second protrusion is inserted into the second groove to plug the second wing and the elastic component.

[0014] Optionally, the first fastener further includes a first operating portion extending from the first fixed portion away from the scanning bed; the second fastener further includes a second operating portion extending from the second fixed portion away from the scanning bed.

[0015] Optionally, the elastic component includes: a first elastic arm extending from the first operating part toward the second operating part; and a second elastic arm extending from the second operating part toward the first operating part.

[0016] Optionally, when the buckle assembly is in an unlocked state, the first elastic arm abuts against the second elastic arm and each is in a compressed state to provide elastic restoring force to each other.

[0017] Optionally, the first snap-fit ​​portion includes a first hook portion and a first connecting portion connecting the first hook portion to the first fixed portion, and the second snap-fit ​​portion includes a second hook portion and a second connecting portion connecting the second hook portion to the second fixed portion, wherein, when the snap-fit ​​assembly is in a locked state, the minimum spacing between the first hook portion and the second hook portion is less than a first preset distance; when the snap-fit ​​assembly is in an unlocked state, the minimum spacing between the first hook portion and the second hook portion is greater than or equal to the first preset distance.

[0018] According to a second aspect of the present disclosure, a scanning bed is provided, which comprises: a bed frame; a protrusion disposed on the bed frame; and the extension device as described above, wherein the protrusion is limited by the buckle assembly to mount the extension device on the bed frame.

[0019] Optionally, the first hook portion has a first step surface, and the second hook portion has a second step surface, wherein when the buckle assembly is in a locked state, the protrusion is limited between the first fixing portion and the first step surface and between the second fixing portion and the second step surface.

[0020] Optionally, the first preset distance is equal to the length of the protrusion.

[0021] Optionally, the extension device further comprises a tongue-shaped insert, the bed frame comprises a tongue-shaped groove, and the tongue-shaped insert is inserted into the tongue-shaped groove.

[0022] According to a third aspect of the present disclosure, a medical imaging system is provided, which includes the scanning bed as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present disclosure may be better understood by describing exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A schematic diagram of an exemplary imaging system is shown.

[0025] Figure 2 A schematic block diagram of an exemplary imaging system is shown.

[0026] Figure 3 A schematic diagram showing an extension device for a scanning bed in a locked state according to an exemplary embodiment of the present disclosure is shown.

[0027] Figure 4 A schematic diagram showing an extension device for a scanning bed in an unlocked state according to an exemplary embodiment of the present disclosure is shown.

[0028] Figure 5 An example of the arrangement of the snap assembly and the elastic component is shown.

[0029] Figure 6 Schematic diagrams showing an extension device for a scanning bed in a locked state according to some other exemplary embodiments of the present disclosure.

[0030] Figure 7 Schematic diagrams showing an extension device for a scanning bed in an unlocked state according to some other exemplary embodiments of the present disclosure.

[0031] Figure 8 Schematic diagrams showing an extension device for a scanning bed in a locked state according to some further exemplary embodiments of the present disclosure.

[0032] Fig. 9 Schematic diagrams showing an extension device for a scanning bed in an unlocked state according to some further exemplary embodiments of the present disclosure.

[0033] Fig.10 and Fig.11 A scanning table according to an exemplary embodiment of the present disclosure is shown.

[0034] Fig.12 An example of an extender mounted to a bed frame of a scanning device is shown.

[0035] In the accompanying drawings, similar components and / or features may have the same reference numerals. In addition, various components of the same type may be distinguished by following the reference numeral with a letter that distinguishes between the similar components. If only the first reference numeral is used in the specification, the description applies to any similar components having the same first reference numeral, regardless of the letter. DETAILED DESCRIPTION

[0036] The specific implementation methods of the present disclosure will be described below. It should be noted that in the specific description of these implementation methods, in order to provide a concise description, it is impossible for this specification to provide a detailed description of all the features of the actual implementation methods. It should be understood that in the actual implementation of any implementation method, just as in the process of any engineering project or design project, in order to achieve the specific goals of the developer and to meet system-related or business-related restrictions, various specific decisions are often made, and this will also change from one implementation method to another. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the content of the present disclosure, some changes in design, manufacturing or production based on the technical content disclosed in the present disclosure are just conventional technical means, and should not be understood as the content of the present disclosure is insufficient.

[0037] Unless otherwise defined, the technical or scientific terms used in the claims and the specification shall have the usual meaning understood by persons with ordinary skills in the technical field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and the claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "one" do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalent elements, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. "Scanning objects" generally include but are not limited to patients, animals or other objects detected by medical imaging equipment.

[0038] The following describes in detail an extension device for a scanning bed provided according to an embodiment of the present disclosure in conjunction with the accompanying drawings.

[0039] Figure 1 to Figure 2 An exemplary embodiment of an imaging system is shown, in which an extension device for a scanning bed provided in an embodiment of the present disclosure can be installed on the scanning bed of the imaging system to expand the scanning range of the scanning bed. Although a CT system is described by way of example, it should be understood that the present technology can also be used for other imaging modalities, such as x-ray imaging systems, magnetic resonance imaging (MRI) systems, nuclear medicine imaging systems, positron emission tomography (PET) imaging systems, single photon emission computed tomography (SPECT) imaging systems, ultrasound imaging systems, and combinations thereof (e.g., multimodal imaging systems, such as PET / CT or PET / MR imaging systems). The present disclosure discussion of the CT imaging modality is provided only as an example of a suitable imaging modality.

[0040] Figure 1 An exemplary CT imaging system 100 configured for CT imaging is shown. Specifically, the CT imaging system 100 is configured to image a subject 112 (such as a patient, an inanimate object, one or more manufactured parts) and / or a foreign object (such as a dental implant, a stent, and / or a contrast agent present in the body). In one embodiment, the CT imaging system 100 includes a gantry 102, which in turn may also include at least one x-ray source 104, which is configured to project an x-ray radiation beam 106 for imaging a subject 112 lying on a scanning bed 114. Specifically, the x-ray source 104 is configured to project the x-ray radiation beam 106 toward a detector array 108 positioned on an opposite side of the gantry 102. Although Figure 1Only a single x-ray source 104 is depicted, but in certain embodiments, multiple x-ray sources and detectors may be employed to project multiple x-ray radiation beams 106 for acquisition of projection data at different energy levels corresponding to the patient. In some embodiments, the x-ray source 104 may implement dual energy gem spectrum imaging (GSI) by rapid peak kilovolt (kVp) switching. In some embodiments, the x-ray detector employed is a photon counting detector capable of distinguishing x-ray photons of different energies. In other embodiments, two sets of x-ray sources and detectors are used to generate dual energy projections, wherein one set of x-ray sources and detectors is set to low kVp and the other set to high kVp. It should therefore be understood that the methods described herein may be implemented with single energy acquisition techniques as well as dual energy acquisition techniques.

[0041] In certain embodiments, the CT imaging system 100 further includes an image processor unit 110 configured to reconstruct an image of a target volume of the subject 112 using an iterative or analytical image reconstruction method. For example, the image processor unit 110 may use an analytical image reconstruction method such as filtered back projection (FBP) to reconstruct an image of the target volume of the patient. As another example, the image processor unit 110 may use an iterative image reconstruction method (such as advanced statistical iterative reconstruction (ASIR), conjugate gradient (CG), maximum likelihood expectation maximization (MLEM), model-based iterative reconstruction (MBIR), etc.) to reconstruct an image of the target volume of the subject 112. As further described herein, in some examples, in addition to the iterative image reconstruction method, the image processor unit 110 may also use an analytical image reconstruction method (such as FBP).

[0042] In some CT imaging system configurations, an x-ray source projects a cone-shaped x-ray radiation beam that is collimated to lie in the XYZ plane of a Cartesian coordinate system and is often referred to as the "imaging plane". The x-ray radiation beam passes through an object being imaged, such as a patient or subject. The x-ray radiation beam, after being attenuated by the object, impinges upon an array of detector elements. The intensity of the attenuated x-ray radiation beam received at the detector array depends on the attenuation of the radiation beam by the object. Each detector element of the array produces a separate electrical signal that is a measurement of the x-ray beam attenuation at the detector location. The attenuation measurements from all detector elements are collected individually to produce a transmission profile.

[0043] In some CT imaging systems, a gantry is used to rotate the x-ray source and detector array around the object to be imaged in the imaging plane so that the angle at which the radiation beam intersects the object is constantly changing. A set of x-ray radiation attenuation measurements (e.g., projection data) from the detector array at one gantry angle is called a "view". A "scan" of an object includes a set of views made at different gantry angles or viewing angles during one rotation of the x-ray source and detector. It is conceivable that the benefits of the methods described herein are derived from medical imaging modalities other than CT, so as used herein, the term "view" is not limited to the use described above with respect to projection data from one gantry angle. The term "view" is used to mean a data acquisition whenever there are multiple data acquisitions from different angles (whether from CT, positron emission tomography (PET) or single photon emission CT (SPECT) acquisitions), and / or any other modality (including modalities yet to be developed) and their combination in fusion embodiments.

[0044] The projection data is processed to reconstruct an image corresponding to a two-dimensional slice acquired through the object, or in some examples where the projection data includes multiple views or scans, an image corresponding to a three-dimensional rendering of the object. A method for reconstructing an image from a set of projection data is known in the art as a filtered back projection technique. Transmission and emission tomography reconstruction techniques also include statistical iterative methods such as maximum likelihood expectation maximization (MLEM) and ordered subset expectation reconstruction techniques and iterative reconstruction techniques. The method converts the attenuation measurements from the scan into an integer called a "CT number" or "Hou's unit", which is used to control the brightness of the corresponding pixel on the display device.

[0045] To reduce the total scan time, a "helical" scan can be performed. To perform a "helical" scan, the patient is moved while data for a specified number of slices is acquired. Such systems produce a single spiral from a cone beam helical scan. The spiral mapped out by the cone beam produces projection data from which an image in each specified slice can be reconstructed.

[0046] As used herein, the phrase "reconstructing an image" is not intended to exclude embodiments of the present disclosure in which data representing an image is generated rather than a visible image. Thus, as used herein, the term "image" broadly refers to both a visible image and data representing a visible image. However, many embodiments generate (or are configured to generate) at least one visible image.

[0047] In one example, the scanning bed 114 may be equipped with an extension device 116 to expand the scanning range of the scanning bed. Figure 3-Figure 11In more detail, the extension device 116 may include a snap assembly, so that the extension device 116 can be mounted to the scanning bed 114 via the snap assembly.

[0048] Figure 2 Shows something like Figure 1 1. An exemplary imaging system 200 of the CT imaging system 100 of FIG. According to aspects of the present disclosure, the imaging system 200 is configured to image a subject 204 (eg, Figure 1 In one embodiment, the imaging system 200 includes a detector array 108 (see Figure 1 ). The detector array 108 also includes a plurality of detector elements 202 that together sense the x-ray radiation beam 106 that passes through a subject 204 (such as a patient) (see Figure 2 ) to collect corresponding projection data. Therefore, in one embodiment, the detector array 108 is manufactured in a multi-slice configuration including multiple rows of cells or detector elements 202. In such a configuration, one or more additional rows of detector elements 202 are arranged in a parallel configuration for collecting projection data.

[0049] In certain embodiments, the imaging system 200 is configured to traverse different angular positions around the subject 204 to collect the desired projection data. Thus, the gantry 102 and components mounted thereon can be configured to rotate about the rotation center 206 to collect, for example, projection data at different energy levels. Alternatively, in embodiments where the projection angle relative to the subject 204 changes over time, the mounted components can be configured to move along a generally curved line rather than along a section of a circle.

[0050] Thus, as the x-ray source 104 and the detector array 108 rotate, the detector array 108 collects data of the attenuated x-ray beam. The data collected by the detector array 108 then undergoes pre-processing and calibration to condition the data to represent the line integral of the attenuation coefficient of the scanned subject 204. The processed data is often referred to as a projection.

[0051] In some examples, individual detectors or detector elements 202 in detector array 108 may include photon counting detectors that register interactions of individual photons into one or more energy bins. It should be appreciated that the methods described herein may also be implemented using energy integrating detectors.

[0052] The acquired projection data sets may be used for base material decomposition (BMD). During BMD, the measured projections are converted into a set of material density projections. The material density projections may be reconstructed to form a pair or set of material density maps or images for each corresponding base material (such as bone, soft tissue, and / or contrast agent maps). The density maps or images may then be correlated to form a volume rendering of the base material (e.g., bone, soft tissue, and / or contrast agent) in the imaging volume.

[0053] Once reconstructed, the base material image produced by the imaging system 200 shows the internal features of the subject 204 represented by the density of the two base materials. The density image can be displayed to show these features. In traditional methods of diagnosing medical conditions (such as disease states), and more generally diagnosing medical events, a radiologist or physician will consider a hard copy or display of a density image to discern characteristic features of interest. Such features can include lesions, size and shape of specific anatomical structures or organs, as well as other features that should be discernible in the image based on the skill and knowledge of the individual practitioner.

[0054] In one embodiment, the imaging system 200 includes a control mechanism 208 to control movement of components, such as rotation of the gantry 102 and operation of the x-ray source 104. In certain embodiments, the control mechanism 208 also includes an x-ray controller 210 configured to provide power and timing signals to the x-ray source 104. Additionally, the control mechanism 208 includes a gantry motor controller 212 configured to control the rotational speed and / or position of the gantry 102 based on imaging requirements.

[0055] In certain embodiments, the control mechanism 208 also includes a data acquisition system (DAS) 214 that is configured to sample analog data received from the detector elements 202 and convert the analog data into digital signals for subsequent processing. The DAS 214 can also be configured to selectively aggregate analog data from a subset of the detector elements 202 into a so-called macro detector, as further described herein. The data sampled and digitized by the DAS 214 is transmitted to a computer or computing device 216. In one example, the computing device 216 stores the data in a storage device or mass storage device 218. For example, the storage device 218 can include a hard drive, a floppy disk drive, a compact disk-read / write (CD-R / W) drive, a digital versatile disk (DVD) drive, a flash drive, and / or a solid-state storage drive.

[0056] In addition, the computing device 216 provides commands and parameters to one or more of the DAS 214, the x-ray controller 210, and the gantry motor controller 212 to control system operations, such as data acquisition and / or processing. In certain embodiments, the computing device 216 controls system operations based on operator input. The computing device 216 receives operator input, which includes, for example, commands and / or scan parameters, via an operator console 220 operably coupled to the computing device 216. The operator console 220 may include a keyboard (not shown) or a touch screen to allow an operator to specify commands and / or scan parameters.

[0057] Although Figure 2 Only one operator console 220 is shown, but more than one operator console may be coupled to the imaging system 200, e.g., for inputting or outputting system parameters, requesting exams, plotting data, and / or viewing images. In addition, in certain embodiments, the imaging system 200 may be coupled to multiple displays, printers, workstations, and / or the like located locally or remotely, e.g., within an institution or hospital or at an entirely different location, via one or more configurable wired and / or wireless networks (such as the Internet and / or a virtual private network, a wireless telephone network, a wireless local area network, a wired local area network, a wireless wide area network, a wired wide area network, etc.).

[0058] In one embodiment, for example, the imaging system 200 includes or is coupled to a picture archiving and communication system (PACS) 224. In an exemplary embodiment, the PACS 224 is further coupled to a remote system (such as a radiology department information system, a hospital information system) and / or to an internal or external network (not shown) to allow operators at different locations to supply commands and parameters and / or gain access to image data.

[0059] The computing device 216 uses operator-provided and / or system-defined commands and parameters to operate a couch motor controller 226, which in turn can control the couch 114, which can be a motorized couch. Specifically, the couch motor controller 226 can move the couch 114 to properly position the subject 204 in the gantry 102 to acquire projection data corresponding to a target volume of the subject 204.

[0060] As previously described, the DAS 214 samples and digitizes the projection data acquired by the detector elements 202. Subsequently, the image reconstructor 230 uses the sampled and digitized x-ray data to perform high-speed reconstruction. Figure 2The image reconstructor 230 is shown as a separate entity, but in certain embodiments, the image reconstructor 230 may form part of the computing device 216. Alternatively, the image reconstructor 230 may not be present in the imaging system 200, and instead the computing device 216 may perform one or more functions of the image reconstructor 230. Furthermore, the image reconstructor 230 may be located locally or remotely, and may be operably connected to the imaging system 200 using a wired or wireless network. In particular, one exemplary embodiment may use computing resources in a "cloud" network cluster for the image reconstructor 230.

[0061] In one embodiment, the image reconstructor 230 stores the reconstructed image in the storage device 218. Alternatively, the image reconstructor 230 may transmit the reconstructed image to the computing device 216 to generate usable patient information for diagnosis and evaluation. In certain embodiments, the computing device 216 may transmit the reconstructed image and / or the patient information to a display or display device 232 that is communicatively coupled to the computing device 216 and / or the image reconstructor 230. In some embodiments, the reconstructed image may be transmitted from the computing device 216 or the image reconstructor 230 to the storage device 218 for short-term or long-term storage.

[0062] The present disclosure provides an extension device for a scanning bed, comprising: an extension plate; a buckle assembly, which is arranged on the extension plate and is configured to be switchable between a locked state and an unlocked state, the buckle assembly comprising a fixing portion and a buckle portion, wherein the fixing portion is rotatably fixed to the extension plate so that the buckle assembly can rotate along a plane parallel to the extension plate, the buckle portion extends from the fixing portion toward the scanning bed, and the buckle portion is configured to be buckled to the scanning bed in the locked state and to be unbuckled from the scanning bed in the unlocked state; and an elastic component, which is configured to provide an elastic force so that the buckle portion is maintained in the locked state.

[0063] refer to Figure 3 and Figure 4 ,in Figure 3 FIG. 1 is a schematic diagram showing an extension device 300 for a scanning bed in a locked state according to an exemplary embodiment of the present disclosure. Figure 4 The schematic diagram shows an extension device 300 for a scanning bed in an unlocked state according to an exemplary embodiment of the present disclosure. As shown in the figure, the extension device 300 may include an extension plate 310 , a buckle assembly 320 and an elastic component 330 .

[0064] The buckle assembly 320 may be disposed on the extension plate 310 and configured to be switchable between a locked state and an unlocked state. Figure 3The buckle assembly 320 in the extension device 300 is shown in a locked state, and Figure 4 The buckle assembly 320 in the extension device 300 is shown in an unlocked state.

[0065] The buckle assembly 320 may include a fixing portion 321 and a buckle portion 322. The fixing portion 321 may be rotatably fixed to the extension plate 320 so that the buckle assembly 320 may be rotated along a plane parallel to the extension plate 310 (eg, parallel to the Figure 3 The buckle assembly 320 can be rotated along the plane parallel to the extension plate 310, and those skilled in the art can understand that the buckle assembly 320 can rotate along the plane parallel to the extension plate 310, including the rotation direction or rotation plane of the buckle assembly 320 being parallel to the plane parallel to the extension plate 310. The buckle portion 322 can extend from the fixing portion 321 to the scanning bed. The buckle portion 322 can be configured to buckle to the scanning bed in a locked state and to be unfastened from the scanning bed in an unlocked state.

[0066] The elastic member 330 may be configured to provide an elastic force F to the buckle assembly 320 so that the buckle portion 322 remains in a locked state.

[0067] In the extension device 300 of the present disclosure, since the buckle assembly 320 can be rotated along a plane parallel to the extension plate 310 to switch between the locked state and the unlocked state, the force perpendicular to the surface of the extension plate 310 generated on the connection part of the buckle assembly 320 and the extension plate 310 during the switching process can be reduced or avoided, thereby reducing the possibility of the buckle assembly 320 being loosened from the extension plate 310. On the other hand, when the buckle assembly 320 is impacted by an external force (for example, the buckle assembly 320 hits a hard object or falls to the ground, causing the buckle assembly 320 to receive a force perpendicular to the surface of the extension plate 310), since the buckle assembly 320 does not rotate along a plane perpendicular to the extension plate 310, the buckle assembly 320 can be formed into a flat shape parallel to the surface of the extension plate 320, reducing the risk of the buckle assembly 320 breaking. Therefore, the structure proposed in the present disclosure is conducive to extending the service life of the extension device 300.

[0068] In some embodiments, the buckle assembly 320 may further include an operating portion 323. The operating portion 323 may be configured to be pressed by a user to rotate the buckle assembly 320 along a plane parallel to the extension plate 310. For example, the pressing direction may be as follows: Figure 3 As shown by the arrow P in FIG. When the user presses the operating portion 323, the buckle assembly 320 rotates and the elastic component 330 is compressed, giving an inclined angle so that the buckle rotates through the screw shaft.

[0069] In some embodiments, the buckle assembly 320 may include a first buckle 320A and a second buckle 320B. The first buckle 320A may include a first fixing portion 321A and a first buckle portion 322A. The second buckle 320B may include a second fixing portion 321B and a second buckle portion 322B.

[0070] In some embodiments, the first clip 320A can be connected to the extension plate 310 via a first screw 340A and can rotate around the first screw 340A along a plane parallel to the extension plate 310. The second clip 320B can be connected to the extension plate 310 via a second screw 340B and can rotate around the second screw 340B along a plane parallel to the extension plate 310. The outer surfaces of the first screw 340A and the second screw 340B can be semi-threaded and semi-smooth shafts, so that the first clip 322A and the second clip 320B can be rotated by the screw shaft respectively. The present disclosure configures the snap fit of the extension device 300 to be parallel to the plane of the extension plate 310 (for example, parallel to Figure 3 and Figure 4 The extension device 300 is rotated in the XZ plane (as shown) rather than in a plane perpendicular to the extension plate 310, which reduces the axial fixing force of the first screw 340A and the second screw 340B, and is beneficial to extending the service life of the extension device 300.

[0071] In some embodiments, the elastic member 330 may be disposed between the first buckle 320A and the second buckle 320B. As an example, the elastic member 330 may include at least one of a spring, rubber, and elastic cotton.

[0072] In some embodiments, the first buckle 320A may further include a first operating portion 323A. The first operating portion 323A may extend from the first fixing portion 321A away from the scanning bed. The second buckle 320B may further include a second operating portion 323B. The second operating portion 323B may extend from the second fixing portion 321B away from the scanning bed. The first operating portion 323A and the second operating portion 323B may be configured to be pressed by a user to rotate the first buckle 320A and the second buckle 320B along a plane parallel to the extension plate 310. For example, the pressing direction may be as follows: Figure 3 As shown by the arrow P in FIG. When the user presses the first operating portion 323A and the second operating portion 323B, the first latch 320A and the second latch 320B rotate respectively and the elastic component 330 is compressed to give an inclined angle so that the latch rotates around the screw shaft.

[0073] In some embodiments, when the buckle assembly 320 is in the unlocked state, the elastic component 330 may be in a compressed state and provide an elastic restoring force F to the first buckle component 320A and the second buckle component 320B, respectively. Figure 4As shown. The elastic restoring force F tends to move the first latch 320A and the second latch 320B toward the locked state. Therefore, when the user releases the first operating portion 323A and the second operating portion 323B, the first latch 320A and the second latch 320B can be turned into the locked state.

[0074] See also Figure 5 , which shows an example of the arrangement of the buckle assembly and the elastic component, which can be along Figure 3 As shown in the figure, the first latch 320A may further include a first wing 324A plugged into the elastic component 330. The second latch 320B may further include a second wing 324B plugged into the elastic component 330. In some embodiments, the wing and the elastic component may be plugged into each other in a projection-groove interference fit manner. For example, Figure 5 As shown, the first wing 324A may include a first protrusion 24A, and the elastic component 330 may include a first groove 33A, so that the first protrusion 24A can be inserted into the first groove 33A to plug the first wing 324A and the elastic component 330; the second wing 324B may include a second protrusion 24B, and the elastic component 330 may include a second groove 33B, so that the second protrusion 24B can be inserted into the second groove 33B to plug the second wing 324B and the elastic component 330. In other embodiments, the first wing 324A may include a first groove, and the elastic component 330 may include a first protrusion; or, the second wing 324B may include a second groove, and the elastic component 330 may include a second protrusion.

[0075] refer to Figure 6 and Figure 7 ,in Figure 6 Schematic diagram showing an extension device 600 for a scanning bed in a locked state according to some other exemplary embodiments of the present disclosure; Figure 7 FIG. 6 is a schematic diagram showing an extension device 600 for a scanning bed in an unlocked state according to some other exemplary embodiments of the present disclosure. Figure 3 and Figure 4 The extension device 300 described is the same and will not be described in detail here. The following mainly describes the special features of the extension device 600.

[0076] In the extension device 600, the elastic member 330 may include a first elastic arm 331A and a second elastic arm 331B. The first elastic arm 331A may extend from the first operating portion 323A toward the second operating portion 323B. The second elastic arm 331B may extend from the second operating portion 323B toward the first operating portion 323A.

[0077] In some embodiments, the first elastic arm 331A and the second elastic arm 331B may abut against each other and each be in a compressed state to provide an elastic restoring force F to each other. When the buckle assembly 330 is in an unlocked state, the elastic restoring force F tends to move the first buckle 320A and the second buckle 320B toward a locked state, so that when the user releases the first operating portion 323A and the second operating portion 323B, the first buckle 320A and the second buckle 320B may become locked. When the buckle assembly 330 is in a locked state, the elastic restoring force F may keep the first buckle 320A and the second buckle 320B in a locked state.

[0078] refer to Figure 8 and Fig. 9 ,in Figure 8 A schematic diagram showing an extension device 800 for a scanning bed in a locked state according to some further exemplary embodiments of the present disclosure; Fig. 9 FIG. 8 is a schematic diagram showing an extension device 800 for a scanning bed in an unlocked state according to some further exemplary embodiments of the present disclosure. Figure 3 , Figure 4 , Figure 6 and Figure 7 The extension devices 300 / 600 described are the same and will not be described in detail here. The following mainly describes the special features of the extension device 800.

[0079] The extension device 800 may include an extension plate 310 and a buckle assembly 820. The buckle assembly 820 may be integrally formed of an elastic material. In other words, unlike the extension device 300 / 600, the buckle assembly 820 may be formed as a single component and include an upper section 820U, a middle section 820M and a lower section 820L. The upper section 820U may include a first fixing portion 821A and a first buckle portion 822A. The lower section 820L may include a second fixing portion 821B and a second buckle portion 822B.

[0080] In some embodiments, Figure 8 As shown, the first fixing portion 821A of the upper section 820U can be connected to the extension plate 310 via the screw 340 and can rotate around the screw 340 along a plane parallel to the extension plate 310. The lower section 820L can be connected to the extension plate 310 and remain fixed relative to the extension plate 310. For example, the second fixing portion 821B of the lower section 820L can be fixed to the extension plate 310 by bonding or welding.

[0081] Since the buckle assembly 820 is formed of an elastic material, the middle section 820M of the buckle assembly 820 can be used as an elastic component and is configured to provide elastic force to the buckle assembly 820 (specifically the upper section 820U) so that the first buckle portion 822A is maintained at a position such as Figure 8 The locked state is shown. In some embodiments, the middle section 820M can be a curved elastic material.

[0082] The buckle assembly 820 may include an operating portion 823. The operating portion 823 may be configured to be pressed by a user to rotate the buckle assembly 820 (specifically the upper section 820U) along a plane parallel to the extension plate 310. For example, the pressing direction may be as follows: Figure 8 As shown by the arrow P. Fig. 9 As shown, when the user presses the operating portion 323, the buckle assembly 820 rotates and the middle section 820M is compressed, giving an inclined angle so that the upper section 820U rotates through the screw shaft. When the user releases the operating portion 323, the compressed middle section 820M provides an elastic restoring force F to the upper section 820U, so that the first buckle portion 822A is restored and maintained in a locked state.

[0083] In an optional embodiment, the lower section 820L may be configured to be rotatably fixed to the extension plate 310 similarly to the upper section 820U, rather than being fixed relative to the extension plate 310 .

[0084] According to another exemplary embodiment of the present disclosure, a scanning bed is also provided. Fig.10 and Fig.11 , which shows a scanning bed 1000 according to an exemplary embodiment of the present disclosure. The scanning bed 1000 may include a bed frame 1010, a protrusion 1020 disposed on the bed frame 1010, and any one of the extension devices (extension device 300, extension device 600 or extension device 800) as described above. Fig.10 and Fig.11 The scanning bed 1000 including the extension device 300 is used as an example for description. In the scanning bed 1000 of the present disclosure, the extension device 300 can be mounted on the bed frame 1010 by limiting the protrusion 1020 using the buckle assembly 320 .

[0085] In some embodiments, the first buckle portion 322A may include a first hook portion 22A and a first connecting portion connecting the first hook portion 22A to the first fixing portion 321A. The second buckle portion 322B may include a second hook portion 22B and a second connecting portion connecting the second hook portion 22B to the second fixing portion 321B. Fig.10When the buckle assembly 320 is in the locked state, the minimum interval D1 between the first hook portion 22A and the second hook portion 22B is less than the first preset distance. Fig.11 , when the buckle assembly 320 is in the unlocked state, the minimum interval D2 between the first hook portion 22A and the second hook portion 22B is greater than or equal to the first preset distance. The first preset distance may be the length of the protrusion 1020 in the X direction. In this way, the buckle assembly 320 may limit the protrusion 1020 in the locked state to fix the extension device 300 to the bed frame 1010, and release the protrusion 1020 in the unlocked state to remove the extension device 300 from the bed frame 1010.

[0086] In some embodiments, the first hook portion 22A may have a first step surface 201. The second hook portion 22B may have a second step surface 202. Fig.10 When the buckle assembly 320 is in a locked state, the protrusion 1020 is limited in the limiting area between the first fixing portion 321A and the first step surface 201 and between the second fixing portion 321B and the second step surface 202. In some embodiments, when the buckle assembly 320 is in a locked state, the bed frame 1010 abuts against the extension plate 310 and the buckle portion 322 abuts against the protrusion 1020, thereby limiting the movement of the extension device 300 in the Z direction.

[0087] In some embodiments, the first hook portion 22A and the second hook portion 22B may have an inclined surface to facilitate the protrusion 1020 to slide into the limiting area along the inclined surface from the outside of the buckle assembly 32 .

[0088] In some embodiments, the extension device 300 may further include a tongue-shaped insert, and the bed frame 1010 may include a tongue-shaped groove. The tongue-shaped insert may be inserted into the tongue-shaped groove to guide the installation of the extension device 300 and the bed frame 1010.

[0089] The scanning bed disclosed in the present invention changes the opening direction of the extension device and the bed frame buckle cooperation. The new design has two buckle parts, which will lock the bed frame from the left and right sides, instead of Fig.12 Such a buckle is arranged up and down. In the scanning bed disclosed in the present invention, the extension device can be guided and installed on the bed frame by inserting the tongue-shaped insert of the extension device into the tongue-shaped groove of the bed frame. When the buckle assembly is pushed to clamp the raised part of the bed frame, the buckle part rotates through the screw shaft; after the installation is completed, the buckle part returns to its natural state, and the extension device is locked in place by the elastic component. The extension device disclosed in the present invention is also very easy to disassemble. It only needs to clamp the operating part of the buckle assembly to loosen the extension device from the bed frame. In this design, the force transmitted to the screw shaft by the buckle assembly is very small, so the axial force applied to the fastening screw when unlocking the extension device is very small, which reduces the failure rate of the fastening screw loosening.

[0090] According to an embodiment of the present disclosure, a medical imaging system is also provided. The medical imaging system may include the scanning bed 1000 as described above. The medical imaging system may be, for example, at least one of a CT (computerized tomography) device, an MR (magnetic resonance) imaging device, and a PET (positron emission tomography) device.

[0091] So far, the extension device for a scanning bed according to the present disclosure, and the scanning bed and medical imaging system including the same are described. In the extension device of the present disclosure, since the buckle assembly that cooperates with the scanning bed rotates along a plane parallel to the extension plate, the fixing force of the connection part (rotating shaft) of the buckle assembly and the extension plate in the axial direction is reduced, which is conducive to extending the service life of the extension device. In addition, due to the new layout and matching method of the buckle assembly of the extension device, the risk of the buckle assembly breaking when the extension device falls or hits a hard object is reduced.

[0092] Some exemplary embodiments have been described above. However, it should be understood that various modifications may be made to the exemplary embodiments described above without departing from the spirit and scope of the present disclosure. For example, if the described techniques are performed in a different order and / or if the components in the described systems, architectures, devices, or circuits are combined in different ways and / or replaced or supplemented by other components or their equivalents, suitable results may be achieved, and accordingly, these modified other implementations also fall within the scope of protection of the claims.

Claims

1. An extension device for a scanning bed, comprising: Extension board; a buckle assembly, disposed on the extension plate and configured to be switchable between a locked state and an unlocked state, the buckle assembly comprising a fixing portion and a buckle portion, wherein the fixing portion is rotatably fixed to the extension plate so that the buckle assembly can rotate along a plane parallel to the extension plate, the buckle portion extends from the fixing portion toward the scanning bed, and the buckle portion is configured to be buckled to the scanning bed in the locked state and to be released from the scanning bed in the unlocked state; as well as The elastic component is configured to provide elastic force to keep the buckle portion in the locked state.

2. The extension device according to claim 1, characterized in that The buckle assembly further includes an operating portion, which is configured to be pressed by a user to rotate the buckle assembly along a plane parallel to the extension plate.

3. The extension device according to claim 1 or 2, characterized in that: The buckle assembly comprises: A first buckle member, the first buckle member comprising a first fixing portion and a first buckle portion; and The second fastener comprises a second fixing portion and a second fastening portion.

4. The extension device according to claim 3, characterized in that: The first clip is connected to the extension plate via a first screw and can rotate around the first screw along a plane parallel to the extension plate; and / or The second clip is connected to the extension plate via a second screw and is rotatable about the second screw along a plane parallel to the extension plate.

5. The extension device according to claim 3, characterized in that: The elastic component is arranged between the first buckle component and the second buckle component.

6. The extension device according to claim 5, characterized in that The elastic component includes at least one of a spring, rubber and elastic cotton.

7. The extension device according to claim 5, characterized in that: When the buckle assembly is in an unlocked state, the elastic component is in a compressed state and provides elastic restoring force to the first buckle component and the second buckle component respectively.

8. The extension device according to claim 3, characterized in that: The first fastener further includes a first operating portion, and the first operating portion extends from the first fixing portion away from the scanning bed; The second buckle further includes a second operating portion, and the second operating portion extends from the second fixing portion away from the scanning bed.

9. The extension device according to claim 8, characterized in that The elastic component comprises: A first elastic arm extending from the first operating portion toward the second operating portion; and A second elastic arm extends from the second operating portion toward the first operating portion.

10. The extension device according to claim 9, characterized in that When the buckle assembly is in an unlocked state, the first elastic arm abuts against the second elastic arm and each is in a compressed state to provide elastic restoring force to each other.

11. A scanning bed, comprising: bedstead; A raised portion, arranged on the bed frame; The extension device according to any one of claims 1 to 10, The buckle assembly is used to limit the protrusion so as to install the extension device to the bed frame.

12. A medical imaging system comprising the scanning table according to claim 11.

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