A dose and focal spot measurement tool for an x-ray source

Abstract

The application provides a dose and focal spot measuring tool for an X-ray source, comprising: a base for placing an X-ray source; a supporting assembly comprising a connecting plate and an adjusting plate, the connecting plate being detachably connected with the base, and the adjusting plate being slidably connected with the connecting plate; a cavity comprising a bottom plate and a cavity sidewall, the bottom plate being fixedly installed on a side of the adjusting plate away from the connecting plate, and the bottom plate being provided with an X-ray source beam outlet clamping groove matched with a beam outlet direction of the X-ray source; and a mounting cylinder comprising a top plate and a mounting cylinder sidewall, a second beam outlet being arranged on a side of the top plate close to the cavity, and a slit test piece placing groove and a dosimeter placing groove being arranged on a side of the top plate away from the cavity, the relative positions of the cavity and the base in the vertical direction and the horizontal direction being realized, and the tool being capable of adapting to X-ray sources of various sizes.

Description

Technical Field

[0001] This invention relates to the field of X-ray technology, and more specifically, to a fixture for measuring the dose and focal spot of an X-ray source. Background Technology

[0002] X-ray sources, with their strong penetrating power and intuitive imaging capabilities, occupy an irreplaceable core position in fields such as industrial inspection and medical diagnosis. In industrial non-destructive testing scenarios, X-ray sources penetrate metal components to accurately detect internal defects such as cracks and pores. The accuracy of their output dose directly determines the sensitivity of defect identification and the reliability of the detection results, which is crucial to the product quality and safety of key industries such as aerospace and machinery manufacturing. In the field of medical diagnosis, whether it is conventional X-ray imaging or high-end CT scans, the accuracy of X-ray dosage not only affects image quality but is also closely related to the radiation dose received by the patient, which is crucial to the safety of medical diagnosis and the health of patients.

[0003] As another core parameter of X-ray sources, the size of the focal spot directly affects the resolution and clarity of the imaging system. In the field of industrial non-destructive testing, a small focal spot can significantly improve the detection system's ability to resolve minute defects, achieving micron-level or even nanometer-level detection accuracy. In medical imaging, a smaller focal spot can effectively reduce penumbra blur, making the imaging of human tissue structures sharper and clearer, helping doctors to more accurately identify lesions.

[0004] With the development of intelligent industrial inspection and low-dose high-resolution medical imaging technologies, the application scenarios of X-ray sources are constantly expanding, and their performance requirements are becoming increasingly stringent. Currently, the measurement of X-ray source dose and focal spot typically employs some traditional methods and devices. For example, when measuring dose, dose detectors such as IBAs may be used, but traditional installation methods make it difficult to accurately position the detector at the required measurement location, leading to errors in the measurement results. Regarding focal spot measurement, commonly used methods, such as the slit method, require precise adjustment of the relative position of the slit and the X-ray source. Existing tooling often struggles to achieve rapid and accurate positioning, affecting measurement efficiency.

[0005] In addition, existing measuring fixtures generally suffer from problems such as structural redundancy, insufficient positioning accuracy, and complex operation procedures, which cannot effectively support high-precision and high-efficiency measurement tasks of X-ray source dose and focal spot. Summary of the Invention

[0006] In view of the problems of low efficiency and low accuracy of the measurement fixtures in the prior art, this application provides a dose and focal spot measurement fixture for an X-ray source to improve measurement efficiency and accuracy.

[0007] To achieve the above and other related objectives, the present invention provides a dose and focal spot measurement fixture for an X-ray source, comprising:

[0008] The base is used to hold the entire X-ray source unit.

[0009] The support assembly includes a connecting plate and an adjusting plate, wherein the connecting plate is detachably connected to the base and the adjusting plate is slidably connected to the connecting plate;

[0010] The cavity includes a base plate and a cavity sidewall. The base plate is fixedly installed on the side of the adjustment plate away from the connecting plate. The base plate is provided with an X-ray source outlet slot, which matches the beam output direction of the X-ray source unit.

[0011] The mounting cylinder is centered and assembled into the cavity. The mounting cylinder can slide up and down relative to the cavity. The mounting cylinder includes a top plate and a side wall. A second beam outlet is provided on the side of the top plate near the cavity. A slit test piece placement slot and a dosimeter placement slot are provided on the side of the top plate away from the cavity.

[0012] Optionally, the X-ray source outlet slot is located at the geometric center of the base plate.

[0013] Optionally, the opening size of the X-ray source exit port slot is larger than the opening sizes of the second exit port and the first exit port.

[0014] Optionally, the cavity sidewall is a double-layered sidewall, comprising an inner cavity sidewall and an outer cavity sidewall, and the mounting cylinder sidewall is installed between the inner cavity sidewall and the outer cavity sidewall.

[0015] Optionally, it further includes: a back plate, fixedly installed on the base, and the connecting plate slidably connected to the back plate.

[0016] Optionally, the back plate is vertically fixed to the base.

[0017] Optionally, it further includes: a second rib, which is a triangular plate, one side of which is fixedly connected to the base and the other side is fixedly connected to the back plate.

[0018] Optionally, it also includes a sliding assembly, wherein a first sliding assembly is provided on the mounting cylinder and the cavity, a second sliding assembly is provided on the contact surface of the connecting plate and the adjusting plate, and a third sliding assembly is provided on the contact surface of the connecting plate and the back plate.

[0019] Optionally, the sliding assembly includes a limiting post and a guide groove that matches the limiting post.

[0020] Optionally, a chromium layer is formed on the inner wall of the mounting cylinder and the inner sidewall of the inner cavity.

[0021] As described above, the X-ray source dose and focal spot measurement fixture, its manufacturing method, and display device provided by the present invention have at least the following beneficial technical effects:

[0022] The X-ray source dose and focal spot measurement fixture of the present invention, by setting a sliding component, realizes the relative position of the cavity and the base in the vertical and horizontal directions, which can be adapted to X-ray source whole machines of various sizes and structures; the mounting cylinder is centered and installed in the cavity, and the two are coaxially installed, with the beam outlet located on the same central axis, improving measurement accuracy; the mounting cylinder is designed with grooves compatible with the mounting of dosimeters and test pieces, so that the fixture can measure both dose and focal spot, improving measurement efficiency; by setting a scale surface on the side of the guide rail groove, the spatial position of the dosimeter or slit test piece can be adjusted relatively accurately in three directions. Attached Figure Description

[0023] Figure 1 The diagram shows a schematic of the dose and focal spot measurement fixture for the X-ray source provided in this application.

[0024] Figure 2 Displayed as Figure 1 The X-ray source dose and focal spot measurement fixture shown is a cross-sectional view along the AA' direction.

[0025] Figure 3 What is displayed is Figure 2 A magnified view of region A shown.

[0026] Figure Labels

[0027] 1. Base; 11. Fixing hole; 2. Support assembly; 21. Connecting plate; 22. Adjusting plate; 23. First rib; 3. Cavity; 31. Base plate; 311. X-ray source beam outlet slot; 312. First beam outlet; 32. Cavity sidewall; 321. Inner cavity sidewall; 322. Outer cavity sidewall; 4. Mounting cylinder; 41. Top plate; 411. Second beam outlet; 412. Slit test piece placement slot; 413. Dosimeter placement slot; 42. Mounting cylinder sidewall; 5. Back plate; 51. Second rib; 601. Limiting post; 602. Guide rail groove; 603. Limiting bolt; 61. First sliding assembly; 62. Second sliding assembly; 63. Third sliding assembly; 64. Scale surface; 641. First scale surface; 642. Second scale surface; 643. Third scale surface. Detailed Implementation

[0028] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Although the illustrations only show components related to the present invention and are not drawn according to the actual number, shape and size of the components, the shape, quantity, positional relationship and proportion of each component can be arbitrarily changed under the premise of realizing the technical solution of this invention, and the layout of the components may also be more complex.

[0030] This embodiment provides a fixture for measuring the dose and focal spot of an X-ray source, such as... Figure 1 As shown, the dose and focal spot measurement fixture for the X-ray source provided in this embodiment is illustrated. Figure 2 As shown, it is displayed as Figure 1 The cross-sectional view along the AA' direction shows that the X-ray source dose and focal spot measurement fixture includes a base 1 for placing the entire X-ray source; a support assembly 2 including a connecting plate 21 and an adjusting plate 22, wherein the connecting plate 21 is detachably connected to the base 1 and the adjusting plate 22 is slidably connected to the connecting plate 21; a cavity 3 including a base plate 31 and a cavity sidewall 32, wherein the base plate 31 is fixedly installed on the side of the adjusting plate 22 away from the connecting plate 21, and the base plate 31 is provided with an X-ray source beam outlet slot 311, and the X-ray source beam outlet slot 311 matches the beam output direction of the entire X-ray source; and a mounting cylinder 4, which is centered in the cavity 3 and can slide up and down relative to the cavity 3, the mounting cylinder 4 including a top plate 41 and a mounting cylinder sidewall 42, wherein the top plate 41 is provided with a second beam outlet 411 on the side near the cavity 3, and a slit test piece placement slot 412 and a dosimeter placement slot 413 on the side of the top plate 41 away from the cavity.

[0031] Specifically, the base 1 is provided with mounting holes 11 for fixing and installing the entire X-ray source. Generally, the base 1 is made of metal, alloy, or non-metallic materials, primarily aluminum alloy, alloy steel, plastic, or composite materials. This meets the requirements of high rigidity, high stability, lightweight, and ease of processing. In this embodiment, the base 1 is made of aluminum alloy. The entire X-ray source includes medical diagnostic X-ray sources, medical therapeutic X-ray sources, and other X-ray sources. This application does not limit the type of the entire X-ray source.

[0032] like Figure 1As shown, in this embodiment, the support assembly 2 includes a connecting plate 21 and an adjusting plate 22. The connecting plate 21 is used to fix the base 1 and the adjusting plate 22. The connecting plate 21 has an inverted L-shaped structure, including a vertical section (long side) structure and a horizontal section (short side) structure. The vertical section of the connecting plate 21 is connected to the base 1, and the horizontal section of the connecting plate 21 is slidably connected to the adjusting plate 22. Optionally, the vertical and horizontal sections of the connecting plate 21 are further provided with first ribs 23, which support the vertical and horizontal sections of the connecting plate 21. Specifically, the dose and focal spot measurement fixture of the X-ray source also includes a back plate 5, which is fixedly installed on the base 1, and the connecting plate 21 is slidably connected to the back plate 5. Optionally, there is an inclination angle α between the back plate 5 and the base 1, where α is between 30° and 60°, suitable for special X-ray sources with an inclined beam direction; optionally, the back plate 5 is vertically fixedly connected to the base 1, forming an L-shaped right-angle support structure. In this embodiment, the back plate 5 and the base 1 are vertically fixedly connected. Optionally, it also includes a second rib 51, which is a triangular plate, wherein one side of the triangular plate is fixedly connected to the back plate 5, and the other side of the triangular plate is fixedly connected to the base 1. The first rib 23 and the second rib 51 serve as triangular reinforcing ribs, utilizing the geometric stability of triangles to disperse stress, enhance the rigidity of the vertical and horizontal sections of the connecting plate 21, as well as the joint between the base 1 and the back plate 5, and prevent deformation of the connecting plate 21, the connection between the back plate 5 and the base 1.

[0033] Specifically, if there is an angle between the back plate 5 and the base 1, then the second rib 51 is an acute-angled triangle; if the back plate 5 and the base 1 are vertically fixedly connected, then the second rib 51 is a right-angled triangle, with one right-angled side fixedly connected to the base 1 and the other right-angled side fixedly connected to the back plate 5. In this embodiment, the second rib 51 is a right-angled triangle. Optionally, the material of the back plate 5 is the same as the material of the base 1.

[0034] like Figure 2As shown, the cavity 3 includes a base plate 31 and a cavity sidewall 32. The base plate 31 is horizontally fixedly installed on the side of the adjusting plate 22 away from the connecting plate 21. An X-ray source outlet slot 311 is provided on the side of the base plate 31 closest to the base 1, and a first outlet hole 312 is provided on the side of the base plate 31 away from the base 1. Specifically, the cavity 3 has a cylindrical structure, and the cavity sidewall 32 is perpendicular to the edge of the base plate 31. The base plate 31 and the adjusting plate 22 are welded or integrally formed. Generally, the X-ray source outlet slot 311 matches the beam output direction of the entire X-ray source, ensuring that X-rays pass through the X-ray source outlet slot 311 and the first outlet hole 312 into the mounting cylinder 4. Specifically, the X-ray source outlet slot 311 is located at the geometric center of the base plate 31 of the cavity 3. Specifically, the first exit port 312 is located within the opening range of the X-ray source exit port slot 311 to ensure that the X-ray source can pass through the X-ray source exit port slot 311 and the first exit port 312. Optionally, the first exit port 312 can be located at any position within the opening range of the X-ray source exit port slot 311. Specifically, in this embodiment, the first exit port 312 is located at the geometric center of the bottom plate 31 of the cavity 3, that is, the first exit port 312 is located at the geometric center of the X-ray source exit port slot 311. Generally, the shape of the X-ray source exit port slot 311 perfectly matches the shape of the X-ray source exit port. If the X-ray source's overall exit port is circular, then the X-ray source exit port slot 311 is a circular slot; if the X-ray source's overall exit port is square, then the X-ray source exit port slot 311 is a square slot.

[0035] Specifically, the opening size of the X-ray source exit slot 311 is larger than the opening size of the first exit aperture 312.

[0036] Optionally, the cavity sidewall 32 is a double-layered sidewall, comprising an inner cavity sidewall 321 and an outer cavity sidewall 322. A certain distance is provided between the inner cavity sidewall 321 and the outer cavity sidewall 322. Specifically, the distance between the inner cavity sidewall 321 and the outer cavity sidewall 322 is greater than the thickness of the mounting cylinder sidewall 42 of the mounting cylinder 4. Generally, the distance between the inner cavity sidewall 321 and the outer cavity sidewall 322 is 5–15 mm. The double-layered sidewall forms a double shield: reducing X-ray attenuation while blocking scattered rays, ensuring operator safety.

[0037] The mounting cylinder 4 is a cylindrical structure and is centrally fitted inside the cavity 3. The mounting cylinder 4 can slide up and down relative to the cavity 3. Specifically, the mounting cylinder 4 includes a top plate 41 and a mounting cylinder sidewall 42. Optionally, the mounting cylinder 4 is installed inside the cavity sidewall 32. Optionally, the mounting cylinder sidewall 42 of the mounting cylinder 4 is installed between the inner cavity sidewall 321 and the outer cavity sidewall 322. Specifically, in this embodiment, the mounting cylinder sidewall 42 of the mounting cylinder 4 is installed between the inner cavity sidewall 321 and the outer cavity sidewall 322 of the cavity 3.

[0038] The top plate 41, away from the cavity 3, has a slit test piece placement slot 412 and a dosimeter placement slot 413. The top plate 41, near the cavity 3, has a second beam outlet 411, which is opposite to the first beam outlet 312, and their diameters are identical. Specifically, the second beam outlet 411 is located at the geometric center of the top plate 41, and the first beam outlet 312 is located at the geometric center of the bottom plate 32. The top plate 41 has the slit test piece placement slot 412 and the dosimeter placement slot 413, which cover the second beam outlet 411. The groove depth of the slit test piece placement slot 412 and the dosimeter placement slot 413 is between 2 and 5 mm, matching the thickness of the slit test piece and the dosimeter. The dual placement slot design of the mounting cylinder top plate 41 allows for quick switching between focal spot measurement and dose measurement within the same mounting cylinder 4.

[0039] Optionally, the inner walls of the cavity 3 and the mounting cylinder 4 are treated to reduce reflection. This includes measures such as polishing, anodizing, or chrome plating, and attaching tungsten or lead foil to reduce radiation scattering. In this embodiment, the inner sidewall 321 of the inner cavity 3 and the inner wall of the mounting cylinder 4 are chrome-plated to form a chrome layer.

[0040] Specifically, the cavity 3 and the mounting cylinder 4 are cylindrical structures. The mounting cylinder 4 is coaxially installed inside the cavity 3. The diameter of the inner cavity sidewall 321 of the cavity 3 is smaller than the inner diameter of the mounting cylinder 4 sidewall, and the diameter of the inner and outer cavity sidewalls 322 of the cavity 3 is larger than the outer diameter of the mounting cylinder 4 sidewall. The opening size of the X-ray source exit slot 311 on the bottom plate 31 of the cavity 3 is larger than the opening size of the first exit aperture 312. The centers of the first exit aperture 312 and the second exit aperture 411 are on the same central axis to ensure that the X-ray beam is transmitted in a straight line. The X-rays are emitted from the X-ray source and transmitted through the exit slot 311, the first exit aperture 312, and the second exit aperture 411 to the slit test piece placement slot 412 and the dosimeter placement slot 413.

[0041] Specifically, the X-ray source dose and focal spot measurement fixture also includes a sliding assembly, which includes a limiting post 601 and a guide rail groove 602 that matches the limiting post 601. Specifically, the sliding assembly includes: a first sliding assembly 61 disposed on the mounting cylinder 4 and the cavity 3; a second sliding assembly 62 disposed on the contact surface of the connecting plate 21 and the adjusting plate 22; and a third sliding assembly 63 disposed on the contact surface of the connecting plate 21 and the back plate 5. Generally, the limiting post 601 and the guide rail groove 602 are made of the same material, such as stainless steel or alloy steel, which are corrosion-resistant and have high strength.

[0042] Specifically, such as Figure 3 As shown, it is displayed as Figure 2 The schematic diagram of the sliding component in area A is shown below; Figure 3 As can be seen, the limiting post 601 is fixedly connected to the side wall 42 of the mounting cylinder 4, and the limiting post 601 does not protrude above the surface of the guide rail groove 602. Optionally, the sliding assembly also includes a limiting bolt 603. A threaded hole is provided on the inner wall of the central shaft of the limiting post 601, which is fastened to the limiting bolt 603. The mutual pressing and cooperation between the limiting bolt 603 and the guide rail groove 602 constitutes a locking mechanism.

[0043] Two sets of first sliding assemblies 61 are provided on the mounting cylinder 4 and the cavity 3, and are arranged opposite to each other. Specifically, the limiting post 601 is fixedly installed on the side wall 42 of the mounting cylinder 4 near the base 1, and the guide rail groove 602 is arranged axially along the side wall 32 of the cavity 3 on the outside of the cavity. The first sliding assembly 61 adjusts the height of the dosimeter and test piece located on the top plate 41 of the mounting cylinder 4 from the X-ray source by adjusting the height of the mounting cylinder 4 from the base 1 (or from the X-ray source).

[0044] A second sliding assembly 62 is provided on the mating surfaces of the connecting plate 21 and the adjusting plate 22 along the extending direction of the adjusting plate 22. Specifically, a limiting post 601 is fixedly installed on the horizontal section structure of the connecting plate 21, and two sets of guide rail grooves 602 are provided along the horizontal direction of the adjusting plate 22, with two limiting posts 601 configured in each set of guide rail grooves 602. The second sliding assembly 62 is used to adjust the position of the horizontal plane of the mounting cylinder 4.

[0045] A third sliding assembly 63 is provided on the mating surface of the connecting plate 21 and the back plate 5 along the extending direction of the connecting plate. Specifically, a limiting post 601 is fixedly installed at the end of the back plate 5 away from the base 1, and two sets of guide rail grooves 602 are provided along the extending direction of the connecting plate 21, with two limiting posts 601 arranged in each set of guide rail grooves 602. The third sliding assembly 63 is used to adjust the height of the adjusting plate 22 from the base 1. Coarse height adjustment is achieved through the third sliding assembly 63, fine horizontal adjustment is achieved through the second sliding assembly 62, and fine height adjustment is achieved through the first sliding assembly 61.

[0046] Optionally, a scale surface 64 is provided in the planar area next to the guide rail groove 602, and the scale surface matches the length of the guide rail groove 602. Specifically, the scale surface is formed by laser etching directly on the measuring fixture, or by attaching an adhesive scale sticker. Specifically, the scale surface 64 includes a first scale surface 641, a second scale surface 642, and a third scale surface 643. The first scale surface 641 is located on both sides of the guide rail groove of the first sliding component 61, the second scale surface 642 is located in the middle of the two guide rail grooves in the second sliding component 62, and the third scale surface 643 is located in the middle of the two guide rail grooves in the third sliding component 63.

[0047] The X-ray source dose and focal spot measurement fixture provided in this embodiment is equipped with a sliding component to realize the relative position of the cavity and the base in the vertical and horizontal directions, which can be adapted to X-ray source machines of various sizes and structures. The mounting cylinder is centered and installed in the cavity, and the two are installed coaxially with the beam outlet located on the same central axis, which improves the measurement accuracy. The mounting cylinder is designed with grooves that are compatible with the mounting of dosimeters and test pieces, so that the fixture can measure both dose and focal spot, improving the measurement efficiency. The scale surface set on the side of the guide rail groove can realize the relatively precise spatial position adjustment of the dosimeter or slit test piece in three directions.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A fixture for measuring the dose and focal spot of an X-ray source, characterized in that, include: The base is used to hold the entire X-ray source unit. The back plate is vertically fixed to the base; The support assembly includes a vertically arranged connecting plate and a horizontally arranged adjusting plate. The connecting plate is detachably connected to the base and is slidably arranged on the back plate in the vertical direction. The adjusting plate is slidably arranged on the connecting plate in the horizontal direction. The cavity includes a base plate and a cavity sidewall. The base plate is fixedly installed on the side of the adjustment plate away from the connecting plate. An X-ray source outlet slot is provided on the side of the base plate near the base. The X-ray source outlet slot matches the beam output direction of the entire X-ray source. A first beam outlet hole is provided on the side of the base plate away from the base. The mounting cylinder is centered and assembled into the cavity. The mounting cylinder can slide up and down relative to the cavity. The mounting cylinder includes a top plate and a side wall. A second beam outlet is provided on the side of the top plate near the cavity. A slit test piece placement slot and a dosimeter placement slot are provided on the side of the top plate away from the cavity.

2. The X-ray source dose and focal spot measurement fixture according to claim 1, characterized in that, The opening size of the X-ray source exit slot is larger than the opening sizes of the second exit aperture and the first exit aperture.

3. The X-ray source dose and focal spot measurement fixture according to claim 1, characterized in that, The cavity sidewall is a double-layer sidewall, comprising an inner cavity sidewall and an outer cavity sidewall, and the mounting cylinder sidewall is installed between the inner cavity sidewall and the outer cavity sidewall.

4. The X-ray source dose and focal spot measurement fixture according to claim 1, characterized in that, Also includes: The second rib is a triangular plate, one side of which is fixedly connected to the base and the other side is fixedly connected to the back plate.

5. The X-ray source dose and focal spot measurement fixture according to claim 1, characterized in that, It also includes sliding components, with a first sliding component provided on the mounting cylinder and the cavity, a second sliding component provided on the contact surface of the connecting plate and the adjusting plate, and a third sliding component provided on the contact surface of the connecting plate and the back plate.

6. The X-ray source dose and focal spot measurement fixture according to claim 5, characterized in that, The sliding assembly includes a limiting post and a guide rail groove that matches the limiting post.

7. The X-ray source dose and focal spot measurement fixture according to claim 6, characterized in that, The sliding component further includes: a scale surface, a planar area located next to the guide rail groove.

8. The X-ray source dose and focal spot measurement fixture according to claim 3, characterized in that, A chromium layer is formed on the inner wall of the mounting cylinder and the inner side wall of the inner cavity.

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