X-ray filtering device, x-ray light source device, and medical imaging apparatus
By designing a movable support structure and a multi-layer filter material combination in the X-ray filtering device, the problem of insufficient filter material thickness options in the prior art is solved, realizing flexible combination and precise control of filter material thickness to meet diverse imaging needs, while reducing radiation dose and noise.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIEMENS SHANGHAI MEDICAL EQUIP LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-14
AI Technical Summary
Existing X-ray filtration devices cannot provide a variety of precise filter media thickness options within a limited space, thus failing to meet diverse X-ray filtration needs.
Design an X-ray filtration device, including a mounting carrier and movable first and second filter units. The movable support structure allows the filter material to switch between shielding and avoidance positions. The support is equipped with multiple filter materials of different thicknesses, and the filter material thickness can be flexibly combined through multi-layer stacking.
It enables more combinations of filter material thickness within a limited space, meets diverse imaging needs, reduces patient radiation dose and detector noise, and improves filtration accuracy and space efficiency.
Smart Images
Figure CN224484026U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical imaging equipment, specifically relating to an X-ray filtering device, an X-ray source device, and a medical imaging device. Background Technology
[0002] When X-rays are used for medical imaging, filter media made of copper, aluminum, or similar materials are needed to filter and absorb low-energy photons in the X-ray beam. These low-energy photons typically do not contribute to imaging or detection; instead, they increase the unnecessary radiation dose to the object being measured or cause detector noise. To meet different application requirements, the thickness of the filter media generally needs to be adjusted. However, due to space constraints, existing filtration devices offer limited methods for adjusting filter media thickness, providing few thickness options and failing to meet diverse and precise X-ray filtration needs. Utility Model Content
[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an X-ray filtering device, an X-ray source device, and a medical imaging equipment that can provide a wider range of filter material thickness options within a limited space, adapting to diverse and precise X-ray filtering needs.
[0004] To achieve the above and other related objectives, this utility model provides an X-ray filtering device, comprising:
[0005] The mounting carrier is provided with a light-passing channel for X-rays to pass through;
[0006] The first filtration unit includes a first bracket disposed on the mounting carrier and at least one first filter material disposed on the first bracket;
[0007] The second filtration unit includes a second bracket disposed on the mounting carrier and at least one second filter material disposed on the second bracket;
[0008] The first bracket and / or the second bracket are movably placed on the mounting carrier so that each of the first filter material and / or the second filter material can switch between a shielding position that blocks the light passage and a reversing position that avoids the light passage.
[0009] In an optional embodiment of this utility model, the first support is provided with a plurality of first filter materials of different thicknesses, and / or the second support is provided with a plurality of second filter materials of different thicknesses.
[0010] In an optional embodiment of the present invention, the first bracket and / or the second bracket are assembled to have a clearance station that allows all of the first filter material or all of the second filter material to avoid the light passage.
[0011] In an optional embodiment of the present invention, the first bracket and / or the second bracket are rotatably placed on the mounting carrier; in response to the first bracket being rotatably placed on the mounting carrier, a plurality of first filter media are circumferentially spaced along the axis of rotation of the first bracket; in response to the second bracket being rotatably placed on the mounting carrier, a plurality of second filter media are circumferentially spaced along the axis of rotation of the second bracket.
[0012] In an optional embodiment of this utility model, the rotation axis of the first bracket and / or the second bracket is set at an angle to the central axis of the light-passing channel; in response to the rotation axis of the first bracket being set at an angle to the central axis of the light-passing channel, each of the first filter materials is set at an angle to the rotation axis of the first bracket, so that the first filter material in the shielding position is perpendicular to the central axis of the light-passing channel; in response to the rotation axis of the second bracket being set at an angle to the central axis of the light-passing channel, each of the second filter materials is set at an angle to the rotation axis of the second bracket, so that the second filter material in the shielding position is perpendicular to the central axis of the light-passing channel.
[0013] In an optional embodiment of this utility model, the first bracket and the second bracket are respectively rotatably placed on the mounting carrier, and the rotation axes of the first bracket and the second bracket coincide.
[0014] In an optional embodiment of this utility model, in response to the first bracket having multiple first filter materials of different thicknesses, the first bracket is rotatably placed on the mounting carrier, the first bracket has multiple first hollow areas distributed circumferentially, each of the first filter materials is respectively installed in the first hollow area, at least one of the first hollow areas is left empty, and when the empty first hollow area rotates to the light passage, the first bracket is placed in the clearance position; in response to the second bracket having multiple second filter materials of different thicknesses, the second bracket is rotatably placed on the mounting carrier, the second bracket has multiple second hollow areas distributed circumferentially, each of the second filter materials is respectively installed in the second hollow area, at least one of the second hollow areas is left empty, and when the empty second hollow area rotates to the light passage, the second bracket is placed in the clearance position.
[0015] In an optional embodiment of this utility model, the thickness of any single first filter material or the thickness of any single second filter material is not equal to the sum of the thicknesses of any first filter material and any second filter material.
[0016] To achieve the above and other related objectives, this utility model also provides an X-ray source device, comprising:
[0017] X-ray source; and
[0018] The X-ray filtering device mentioned above;
[0019] The X-ray filter is mounted on the X-ray emission end of the X-ray source via a mounting carrier, and the light transmission channel is aligned with the X-ray emission path.
[0020] To achieve the above and other related objectives, this utility model also provides a medical imaging device, comprising:
[0021] The X-ray filtering device; or
[0022] The aforementioned X-ray source device.
[0023] The technical advantages of this invention are as follows: This invention movably integrates the first or second filter unit onto the mounting carrier, and utilizes the coordinated movement of the first and second supports to achieve flexible combination of filter materials in the light-passing channel; this structure breaks through the spatial limitations of single-layer filter materials, and through the switching of filter material shielding and avoidance positions, filter materials of different materials and thicknesses can function independently or be used in combination, realizing more possible combinations of filter material thicknesses within a limited space; it significantly expands the precise control range of X-ray energy spectrum, meets diverse imaging needs, and maintains the miniaturization characteristics of the device through modular active design, while reducing patient radiation dose and detector noise, thus improving filtration accuracy and space efficiency. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the medical imaging equipment provided in an embodiment of this utility model;
[0025] Figure 2 This is a perspective view of one of the X-ray filtering devices provided in an embodiment of the present invention;
[0026] Figure 3 This is a side view of one of the X-ray filtering devices provided in an embodiment of the present invention;
[0027] Figure 4 This is a side view of another X-ray filtering device provided in an embodiment of the present invention;
[0028] Figure 5 This is a side view of another X-ray filtering device provided in an embodiment of the present invention;
[0029] Figure 6 This is a perspective view of the first filter unit provided in an embodiment of the present invention;
[0030] Figure 7This is a perspective view of the second filter unit provided in an embodiment of the present invention;
[0031] Figure 8 This is a perspective view of the additional filter unit provided in an embodiment of the present invention. Detailed Implementation
[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The nouns and pronouns referring to people in this patent application are not limited to specific genders.
[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0034] The working principle of an X-ray machine is as follows: Figure 1 As shown, X-rays emitted from X-ray source 200 pass through the human body after being filtered by X-ray filter device 100 and are ultimately received by X-ray receiver device 300. The computer reconstructs a medical image of the human body based on the received signal. The X-ray filter device 100 can use copper, aluminum, or other materials as filter media, which can filter and absorb low-energy photons in the X-ray beam, reducing unnecessary radiation dose to the subject and decreasing detector noise. For different applications, the thickness of the filter media generally needs to be adjusted. Some solutions use a single-layer structure for the X-ray filter device 100. While these solutions offer several different filter media thickness options, space constraints limit the number of filter media that can be arranged in a single layer, still failing to meet diverse and precise X-ray filtration requirements. Therefore, this invention uses a multi-layer structure for the X-ray filter device 100. Each layer can provide at least one thickness option, and the layers can be stacked to create various thickness combinations, greatly enriching the range of filter media thickness options and thus meeting diverse and precise X-ray filtration needs.
[0035] The X-ray filtering device 100 provided by this utility model can be applied to medical imaging equipment, especially medical imaging equipment that uses X-rays to reconstruct the internal image features of the human body, such as X-ray machines; it should be understood that the application scenarios of the X-ray filtering device 100 are not limited to this, and all equipment with diverse and precise X-ray filtering needs should be applicable to this utility model; the technical solution of this utility model will be described in detail below in conjunction with the application of the X-ray filtering device 100 in medical imaging equipment.
[0036] Please see Figure 1 As shown, an embodiment of this utility model provides a medical imaging device, which includes an X-ray source device and an X-ray receiver device 300. The X-ray source device includes an X-ray source 200 and an X-ray filter device 100. The X-ray source 200 is used to generate X-rays, and the X-ray filter device 100 is used to filter and absorb low-energy photons in the X-ray beam, reduce unnecessary radiation dose to the subject, and reduce detector noise. The X-ray receiver device 300 can be a standalone module or integrated into a device used to support the human body, such as a hospital bed.
[0037] Please see Figure 1 , 2As shown in Figures 3, 6, and 7, the X-ray filtering device 100 provided by this utility model includes a mounting carrier (not shown), a first filtering unit 10, and a second filtering unit 20. The mounting carrier is provided with a light-passing channel 101 for X-rays to pass through. The mounting carrier can be a housing for accommodating the X-ray source device or the various components of the X-ray filtering device 100, such as the housing of the X-ray source device or the X-ray filtering device 100, or it can be a support for mounting the various components of the X-ray source device or the X-ray filtering device 100, such as a frame for mounting the various components of the X-ray source device or the X-ray filtering device 100. The first filtering unit 10 includes a first support 11 disposed on the mounting carrier and at least one first filter material 12 disposed on the first support 11. The second filtering unit 20 includes a first filter material 12 disposed on the mounting carrier. The mounting carrier includes a second support 21 and at least one second filter material 22 disposed on the second support 21. It should be noted that the first filter material 12 and the second filter material 22 are X-ray filter material components or X-ray filter parts formed of conventional materials, capable of filtering and absorbing low-energy photons in the X-ray beam. In some embodiments, the first filter material 12 and the second filter material 22 may be, for example, copper or aluminum, and may be the same material or different materials. The first support 11 and / or the second support 21 are movably placed on the mounting carrier so that each of the corresponding first filter material 12 and / or second filter material 22 can switch between a shielding position that shields the light passage 101 and a reversing position that avoids the light passage 101. The X-ray filtering device 100 is mounted on the X-ray emission end of the X-ray source 200 via the mounting carrier, and the light passage 101 is aligned with the X-ray emission path. In specific embodiments, both supports can be configured as movable structures, or only one support can be configured as a movable structure while the other is configured as a fixed structure. When one support is configured as a fixed structure, the filter material on that support needs to be placed on the light-passing channel 101. In some embodiments, the movable support can be driven by a drive element such as a motor to achieve automatic switching between shielding and avoidance positions of the filter materials. Preferably, the drive element can be, for example, a servo electrode, a stepper motor, or other drive element with controllable stroke to achieve precise control of the filter material's movement stroke and dwell position. Furthermore, some embodiments may also include a control component that can receive a filter material thickness selection command input by the user and automatically control the drive element's operation according to the command. The control component can be a controller integrated into the X-ray source device or X-ray filter device 100 specifically for controlling the operation of each component of the X-ray source device or X-ray filter device 100, or it can be an external controller, such as the main controller of a medical imaging device or a handheld operator.
[0038] This invention movably integrates the first filter unit 10 or the second filter unit 20 onto the mounting carrier, utilizing the coordinated movement of the first support 11 and the second support 21 to achieve flexible combination of the filter materials in the light-passing channel 101. This structure breaks through the spatial limitations of single-layer filter materials, allowing filter materials of different materials and thicknesses to function independently or be used in combination through the switching of filter material shielding and avoidance positions, realizing more possible combinations of filter material thicknesses within a limited space. It significantly expands the precise control range of X-ray energy spectrum, meeting diverse imaging needs, while maintaining the miniaturization characteristics of the device through modular active design, reducing patient radiation dose and detector noise, and achieving improvements in filtration accuracy and space efficiency.
[0039] Please see Figure 6 , 7 As shown, in an optional embodiment of this utility model, the first support 11 is provided with multiple first filter materials 12 of different thicknesses, and the second support 21 is provided with multiple second filter materials 22 of different thicknesses. This further embodiment integrates multiple filter materials of different thicknesses on the same support, so that a single filter unit can provide multiple thickness options. Combined with the superposition effect of multiple support layers, the range of filter material thickness combinations is further expanded. While maintaining the compactness of the device, the synergistic effect of multiple thickness options within a single layer and the combination between layers enables more precise adjustment of filter material thickness, thereby enabling more accurate matching of different imaging requirements.
[0040] It should be understood that in some other embodiments, when the demand for filter media diversity is not high, only one of the first filter media 12 and the second filter media 22 may be provided, while multiple of the other may be provided. This can double the filter media thickness options and can also meet the most basic filter media diversity requirements to a certain extent.
[0041] Please see Figure 2 , 3As shown in Figures 6 and 7, in an optional embodiment of this utility model, the first support 11 and the second support 21 are assembled to have a clearance position that allows all the first filter materials 12 or all the second filter materials 22 to avoid the light passage 101. This further embodiment, by allowing each support layer to independently and completely avoid the light passage, further expands the flexibility of thickness combinations while retaining the original independent filtration function of a single layer. When any layer is in the clearance position, the other layer can still provide multiple thickness options. Combined with the combination mode of two layers stacked, the number of selectable thicknesses is further increased. In addition, by setting a completely clearance position, this embodiment allows all filter materials to be moved out of the light passage 101 at the same time, retaining the original X-ray mode without filter material intervention. While ensuring the flexibility of multi-layer filter material combination, it is still compatible with the imaging requirements of traditional single-layer filtration or no filtration. This allows the device to meet the high-precision energy spectrum control scenario and quickly switch to full-throughput mode to deal with high-penetration examinations, enhancing the adaptability and ease of operation in clinical applications.
[0042] It should be understood that in some other embodiments, an air-avoidance station may be provided only for one of the first support 11 and the second support 21.
[0043] Please see Figure 2 , 3 As shown in Figures 6 and 7, in an optional embodiment of this utility model, the first support 11 and the second support 21 are rotatably placed on the mounting carrier; in response to the first support 11 being rotatably placed on the mounting carrier, a plurality of first filter materials 12 are circumferentially spaced along the rotation axis of the first support 11; in response to the second support 21 being rotatably placed on the mounting carrier, a plurality of second filter materials 22 are circumferentially spaced along the rotation axis of the second support 21. This further embodiment, through a rotating support design, distributes different filter materials circumferentially along the rotation axis, so that filter material switching can be completed with only a simple rotation action; it achieves a rapid switching function of multiple filter materials within a limited installation space. During operation, only the support needs to be rotated to accurately locate the target filter material or avoid empty positions, significantly improving clinical operation efficiency. At the same time, the stability of the rotating structure also ensures the positioning accuracy of the filter material and ensures the reliability of filter material thickness control.
[0044] It should be understood that the movement mode of the support is not unique. For example, in some other embodiments, if space permits, the support can also be configured as a translational structure; or the two supports can be configured with different movement modes, such as one support being configured as a rotational structure and the other support being configured as a translational structure.
[0045] Please see Figure 2 , 3As shown, in an optional embodiment of this utility model, the rotation axis of the first bracket 11 and / or the second bracket 21 is set at an angle to the central axis of the light passage 101; in response to the rotation axis of the first bracket 11 being set at an angle to the central axis of the light passage 101, each of the first filter materials 12 is set at an angle to the rotation axis of the first bracket 11, so that the first filter material 12 in the shielding position is perpendicular to the central axis of the light passage 101; in response to the rotation axis of the second bracket 21 being set at an angle to the central axis of the light passage 101, each of the second filter materials 22 is set at an angle to the rotation axis of the second bracket 21, so that the second filter material 22 in the shielding position is perpendicular to the central axis of the light passage 101. This further embodiment achieves a compact layout of the rotating mechanism by tilting the support shaft to the central axis of the light transmission channel 101 and adjusting the filter material installation angle accordingly. By utilizing the spatial misalignment characteristics of the tilted shaft, the movement trajectory of the filter material during the rotation of the support avoids the core area of the emission channel, which not only ensures the verticality of the filter material's working posture and guarantees the filtration effect, but also avoids the large-diameter rotation space required by the parallel shaft.
[0046] It should be understood that in some other embodiments, the support may be configured as a disc-shaped structure if space permits.
[0047] Please see Figure 2 , 3 As shown, in an optional embodiment of this utility model, the rotation axes of the first support 11 and the second support 21 coincide. This further embodiment, by coaxially arranging the rotation axes of the multi-layer supports, allows multiple filter units to share the same rotation center; utilizing the compact layout of coaxial stacking, while maintaining the independent rotation function of each layer, it completely eliminates the radial spacing space required by traditional multi-axis systems, reduces the radial dimension of the overall device, and achieves integrated design of the filter device while ensuring flexible switching of multi-layer filter media.
[0048] Please see Figure 2 As shown, further, to solve the driving problem of the two supports, a through hole 14 can be provided in the center of one of the supports, and a gear ring 15 can be provided on the edge of the through hole 14. This support is driven to rotate by the gear 17 at the end of the first motor 16 meshing with the gear ring 15. The rotating shaft of the other support passes through the through hole 14 and is directly connected to the second motor 24, realizing a compact layout of the driving elements. It should be understood that the layout of the driving elements is not unique. For example, in some other embodiments, a smaller motor can be selected to achieve a direct connection between the two supports and the motor.
[0049] Please see Figure 2 , 3As shown in Figures 6 and 7, in an optional embodiment of this utility model, the first support 11 is provided with a plurality of first hollow areas 13 distributed circumferentially, each of the first filter materials 12 is respectively installed in the first hollow area 13, and at least one of the first hollow areas 13 is left unused. When the unused first hollow area 13 rotates to the light passage 101, the first support 11 is placed in the clearance position. The second support 21 is provided with a plurality of second hollow areas 23 distributed circumferentially, each of the second filter materials 22 is respectively installed in the second hollow area 23, and at least one of the second hollow areas 23 is left unused. When the unused second hollow area 23 rotates to the light passage 101, the second support 21 is placed in the clearance position. This further embodiment achieves seamless switching between the working state and the fully open state of the filter material by setting an empty hollow area on the rotating support as a clearance station; the rotation switching mechanism allows for precise switching between the working position and the clearance position of the filter material without additional displacement space during operation, which not only meets the clinical need for rapid switching, but also avoids the reliability risks brought about by complex mechanical structures, thereby improving the practicality and stability of the equipment.
[0050] In an optional embodiment of this invention, the thickness of any single first filter material 12 or any single second filter material 22 is not equal to the sum of the thicknesses of any first filter material 12 and any second filter material 22. This further embodiment, by rationally configuring the thickness of a single layer of filter material, ensures that no single layer thickness or multi-layer combination thickness is repeated, making each selectable filtration thickness unique. This avoids the problem of low adjustment efficiency caused by redundant thickness combinations and maximizes the number of effective thickness options. With a limited number of filter material configurations, a wider and non-repeating thickness coverage range is achieved, significantly improving the accuracy of X-ray energy spectrum modulation and the convenience of clinical operation.
[0051] It should be noted that the number of filter units in the X-ray filter device 100 is not limited to two layers; the number of selectable filter media thicknesses can be further expanded by increasing the number of layers, for example, in... Figure 1-3 In the embodiments shown in Figures 1 and 8, an additional filter unit 30 can be added. The specific structure of this additional filter unit 30 can be the same as or different from the first filter unit 10 or the second filter unit 20. For example, in the illustrated embodiment, the additional filter unit 30 includes a flat plate support 31 and an additional filter material 32. The flat plate support 31 is driven by a third motor 33, allowing the additional filter material 32 to move into or out of the light channel 101, thus doubling the filter material thickness options. In other embodiments, the first filter unit 10, the second filter unit 20, and the additional filter unit 30 can also be implemented in different combinations, for example... Figure 4 In the illustrated embodiment, only the first filter unit 10 and the second filter unit 20 may be retained, for example in... Figure 5 In the illustrated embodiment, only the first filtering unit 10 and the supplementary filtering unit 30 may be retained. It is readily understood that, for ease of description, the component indicated by the reference numeral 30 is referred to as the "supplementary filtering unit," which may also be sequentially named the third filtering unit. Furthermore, in embodiments including only the first filtering unit 10 and the supplementary filtering unit 30, the supplementary filtering unit 30 may also be referred to as the second filtering unit. In other words, in this document, "first," "second," etc., do not indicate their importance or order, but are only used to distinguish them for the convenience of document description.
[0052] In summary, this invention movably integrates the first or second filter unit onto the mounting carrier, utilizing the coordinated movement of the first and second supports to achieve flexible combinations of filter materials in the light-passing channel. This structure overcomes the spatial limitations of single-layer filter materials, allowing filter materials of different materials and thicknesses to function independently or be used in combination through the switching of filter material shielding and avoidance positions. This enables more combinations of filter material thicknesses within a limited space, meeting diverse imaging needs. Simultaneously, the modular design maintains the device's miniaturization, reduces patient radiation dose and detector noise, and improves filtration accuracy and space efficiency. By integrating multiple filter materials of different thicknesses on the same support, it allows for… A single filter unit can offer multiple thickness options, and the combination range of filter material thicknesses is further expanded by stacking multiple layers of filter material. While maintaining the compactness of the device, the synergistic effect of multiple thickness options within a single layer and the combination of layers enables more precise adjustment of filter material thickness, thereby more accurately matching different imaging requirements. By tilting the bracket pivot and the central axis of the light passage, and adjusting the filter material installation angle accordingly, a compact layout of the rotating mechanism is achieved. Utilizing the spatial misalignment characteristics of the tilted pivot, the movement trajectory of the filter material avoids the core area of the emission channel when the bracket rotates, ensuring the verticality of the filter material's working posture and guaranteeing the filtration effect, while avoiding the large diameter rotation space required by traditional parallel pivots.
[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An X-ray filtering device, characterized in that, include: The mounting carrier is provided with a light-passing channel for X-rays to pass through; The first filtration unit includes a first bracket disposed on the mounting carrier and at least one first filter material disposed on the first bracket; The second filtration unit includes a second bracket disposed on the mounting carrier and at least one second filter material disposed on the second bracket; The first bracket and / or the second bracket are movably placed on the mounting carrier so that each of the first filter material and / or the second filter material can switch between a shielding position that blocks the light passage and a reversing position that avoids the light passage.
2. The X-ray filtering device according to claim 1, characterized in that, The first support is provided with multiple first filter materials of different thicknesses, and / or the second support is provided with multiple second filter materials of different thicknesses.
3. The X-ray filtering device according to claim 2, characterized in that, The first bracket and / or the second bracket are assembled to have a clearance station that allows all of the first filter material or all of the second filter material to avoid the light passage.
4. The X-ray filtering device according to claim 2, characterized in that, The first support and / or the second support are rotatably placed on the mounting carrier; in response to the first support being rotatably placed on the mounting carrier, a plurality of the first filter media are circumferentially spaced along the axis of rotation of the first support; in response to the second support being rotatably placed on the mounting carrier, a plurality of the second filter media are circumferentially spaced along the axis of rotation of the second support.
5. The X-ray filtering device according to claim 4, characterized in that, The pivot of the first bracket and / or the second bracket is set at an angle to the central axis of the light-passing channel; in response to the pivot of the first bracket being set at an angle to the central axis of the light-passing channel, each of the first filter materials is set at an angle to the pivot of the first bracket, so that the first filter material in the shielding position is perpendicular to the central axis of the light-passing channel; in response to the pivot of the second bracket being set at an angle to the central axis of the light-passing channel, each of the second filter materials is set at an angle to the pivot of the second bracket, so that the second filter material in the shielding position is perpendicular to the central axis of the light-passing channel.
6. The X-ray filtering device according to claim 4 or 5, characterized in that, The first bracket and the second bracket are respectively rotatably placed on the mounting carrier, and the rotation axes of the first bracket and the second bracket coincide.
7. The X-ray filtering device according to claim 3, characterized in that, In response to the first bracket having multiple first filter materials of different thicknesses, the first bracket is rotatably placed on the mounting carrier. The first bracket has multiple first hollow areas distributed circumferentially, and each first filter material is respectively installed in the first hollow area. At least one first hollow area is left empty. When the empty first hollow area rotates to the light passage, the first bracket is placed in the clearance position. In response to the second bracket having multiple second filter materials of different thicknesses, the second bracket is rotatably placed on the mounting carrier. The second bracket has multiple second hollow areas distributed circumferentially, and each second filter material is respectively installed in the second hollow area. At least one second hollow area is left empty. When the empty second hollow area rotates to the light passage, the second bracket is placed in the clearance position.
8. The X-ray filtering device according to claim 2, characterized in that, The thickness of any single first filter material or any single second filter material is not equal to the sum of the thicknesses of any first filter material and any second filter material.
9. An X-ray source device, characterized in that, include: X-ray source; as well as The X-ray filtering device according to any one of claims 1 to 8; The X-ray filter is mounted on the X-ray emission end of the X-ray source via a mounting carrier, and the light transmission channel is aligned with the X-ray emission path.
10. A medical imaging device, characterized in that, include: The X-ray filtering device according to any one of claims 1 to 8; or The X-ray source device according to claim 9.