A combinable and expandable detector system

Abstract

The present invention relates to a combinable and expandable detector system, including a detector module, wherein the detector module includes a module base, a detector unit and a unit rail. The detector unit can be detachably fixed on the unit rail, a guide groove is provided at the bottom of the unit rail, and a horizontal linear guide rail is provided on the module base. A clearance fit is adopted between the guide groove and the horizontal linear guide rail, and the unit rail can be slidably displaced along the direction of the horizontal linear guide rail in the module base. The present invention solves the problem of inconvenient maintenance of the detector unit in the prior art, and also facilitates the positioning and installation of the detector unit, thereby reducing maintenance costs and improving the positioning accuracy of the detector unit.

Description

Technical Field

[0001] The present invention relates to the technical field of tomography medical equipment, in particular to a combinable and expandable detector system. Background Art

[0002] CT (Computed Tomography) utilizes X-ray scanning. Electrophoton detectors receive the signals, convert them into digital data, and then feed them into a computer, which then converts them into images. CT is a painless, non-invasive, and non-hazardous auxiliary examination tool suitable for all ages, offering high accuracy. As a key component of CT equipment, the performance of the CT detector is crucial. Each detection channel in a CT detector is integrated along the slice thickness direction, forming a detector module that detects and collects data in the Z direction. However, existing CT detectors suffer from the following drawbacks: First, the detector module is a high-value, critical component comprised of multiple high-value electromechanical components, including a collimator, detector crystal, A / D board, and DAS board. If a detection channel fails, the entire detector module must be scrapped and replaced, resulting in high costs. Second, different models require different Z-axis coverage and row number specifications, requiring customization based on customer needs. This lacks universality, hinders large-scale production, and results in high costs. The product has poor scalability and upgradeability, and cannot quickly meet the flexible market differentiation needs and the needs of high-end large-coverage volume CT. Secondly, the overall detector module can only be made into a simple straight line arrangement in the direction of layer thickness. For high-end wide-coverage volume detectors, since X-rays cannot be incident on the detection crystal surface at equal distances and vertically, image artifacts and distortion will be generated, affecting clinical diagnosis. Finally, the detector module is difficult to position and replace, the base structure is complex, and the cost is high.

[0003] Chinese patent document CN209004028U discloses a detector module for a CT detector, the CT detector comprising a support body; a bracket provided with a first positioning structure, the first positioning structure being used for positioning and mounting with the support body; a detector unit mounted on the bracket, the detector unit comprising a base body, and a scintillator, a photoelectric converter, and an analog-to-digital conversion chip mounted on the base body, the scintillator being arranged opposite the photoelectric converter, and the analog-to-digital conversion chip being connected to a side of the photoelectric converter facing away from the scintillator; a plurality of detector units being provided, the plurality of detector units being arranged in a row. This application can improve the relative position accuracy of each detector module and the support body, thereby improving the detection accuracy of the CT detector. However, in this patent, if one of the detector units is damaged, the entire detection module must first be removed, and then the detection module must be disassembled before the detection unit can be replaced. Furthermore, in this patent, the detection module is often fixed with screws, requiring the removal of a large number of screws, making repair and replacement extremely inconvenient.

[0004] Chinese patent document CN209559787U discloses a CT detector guide rail assembly and a CT detection device, wherein the CT detector guide rail assembly includes: a guide rail frame and a plurality of mounting parts connected to the guide rail frame; the plurality of mounting parts are arranged in an arc in sequence, and the mounting parts are provided with a mounting surface for mounting a CT detector module and adapted to the CT detector module on the side facing the outside of the arc. The plurality of CT detector modules are mounted on the guide rail frame through corresponding mounting parts to form a complete CT detector array. Compared with the traditional solution of directly mounting the CT detector module on the guide rail frame, it is easier to machine high-precision mounting surfaces on small-sized mounting parts, the machining quality is easier to control, the finished product inspection is easier, and the yield rate is higher, thereby significantly reducing the machining cost. Moreover, when a high-precision mounting surface is damaged, only the corresponding mounting part needs to be replaced without replacing the entire guide rail frame. However, in this patent, the detection module is fixed to the guide rail frame through the mounting part. When a detection unit in the detection module is damaged, the entire detection module must be disassembled first, and then the detection unit must be disassembled and replaced. The fixing method still uses screws, so it is extremely inconvenient during disassembly and installation. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned prior art, the present invention discloses a combinable and expandable detector system. The present invention solves the problem of inconvenient maintenance of detector units in the prior art, and at the same time improves the installation accuracy of the detector units, thereby reducing maintenance costs and improving the positioning accuracy of the detector units.

[0006] The specific technical solution disclosed in the present invention is as follows: A combinable and expandable detector system includes a detector module, the detector module includes a module base, a detector unit and a unit rail, multiple groups of detector units are arranged in a row along the arc surface on the unit rail, and are detachably fixed on the unit rail, a guide groove is provided at the bottom of the unit rail, and a horizontal linear guide rail is provided on the module base, and a clearance is adopted between the guide groove and the horizontal linear guide rail, and the unit rail is slidable along the direction of the horizontal linear guide rail in the module base, so that the disassembly and installation of the detector module become simple during maintenance, and there is no need to disassemble or install screws multiple times. The detector module can be disassembled or installed and positioned by pulling out or pushing back the detector module, which greatly simplifies the maintenance steps, reduces the maintenance time, and improves the assembly accuracy.

[0007] Furthermore, a vertical flange extending vertically downward is provided on the lower surface of the horizontal linear guide rail, and the vertical flange and the horizontal linear guide rail form a T-shaped support structure. This structure not only ensures the overall strength of the detector module, but also enhances the heat dissipation performance of the electronic components in the detector module by adding heat sinks on both sides of the T-shaped support structure.

[0008] Furthermore, removable fastening screws are provided at both ends of the unit track to fix the relative position of the unit track and the horizontal linear guide rail. When disassembling, only the two screws at both ends of the unit track need to be removed to pull out the detector module, which not only ensures that the detector unit is installed firmly, but also avoids the use of a large number of screws, which makes disassembly cumbersome.

[0009] Furthermore, heat sinks are provided on both sides of the vertical flange, and the fin portion of the heat sink is in close contact with the surface of the vertical flange. A large amount of heat generated by the electronic components in the detector module is transferred to the T-shaped support structure and the heat sink in close contact with the T-shaped support structure. The heat dissipation area of ​​the heat sink is increased by the T-shaped support structure, and the heat accumulated on the T-shaped support structure can be dissipated and discharged to the outside of the equipment through air flow, thereby avoiding overheating of the detector system and damage to the machine.

[0010] Furthermore, the detector module also includes a data processing board, a support plate and a protective plate. The data processing board is fixed on the heat sink on one side. The unit rail, the heat sink and the data processing board are fixedly connected through the support plates located at both ends of the module base and are wrapped into one by the protective plate.

[0011] Furthermore, the bottom of the detector unit is fixedly connected to a mounting base, the mounting base is provided with a raised portion extending vertically downward, and the raised portion is provided with a fixing hole.

[0012] Furthermore, the unit rail is provided with a threaded hole that matches the fixing hole of the mounting base. The mounting base is fixed to the unit rail by passing a fastening screw through the fixing hole and the threaded hole. When disassembling the detector unit, it is only necessary to remove the fastening screw of the corresponding damaged detector unit, replace it with an intact detector unit, and then reinstall the fastening screw.

[0013] Furthermore, the detector unit adopts a rectangular micro-flat panel detector with 32×32 array channels, that is, each detector unit has 32 rows. By adding or reducing detector units along the unit track, the number of rows of the detector module can be expanded or contracted.

[0014] Furthermore, the detector system in the present invention includes a substrate and a connecting plate, and multiple groups of detector modules are arranged in sequence according to a certain arc (the radius distance is the distance from the focus to the detection crystal). One end of the module base is vertically fixed to the surface of the substrate by a detachable fastener, and the other end is fixed together by the connecting plate, so that X-rays can be equidistantly and vertically incident on the detection crystal surface in the detector module, avoiding artifacts and distortion in the detection image, which affects clinical diagnosis.

[0015] Furthermore, the detector system in the present invention also includes an installation shell and an air inlet assembly. The installation shell is a hollow cavity formed by a fixed connection of an integration plate fixing plate, a bottom shell, a front shell and a top cover plate. The integration plate fixing plate is provided with a data integration board for integrating data lines connecting the detector modules; a plurality of air inlets are provided on the surface of the front shell, and the air inlet assembly is fixedly installed at each air inlet. A good ventilation channel is formed by the installation shell, and in conjunction with the air inlet assembly, a ventilation flow with an extremely fast flow rate is formed in the cavity, thereby reducing the temperature inside the cavity.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1) In the present invention, each detector module can be decomposed into multiple groups of independent detector units along the layer thickness direction. Each detector unit can be replaced and maintained separately. During the maintenance and replacement process, there is no need to disassemble the entire detector module. Only the unit guide rail where the detector unit is installed needs to be pulled out or pushed back, which simplifies the maintenance steps, enhances the installation accuracy, and reduces the maintenance cost.

[0018] 2) The detector module of the present invention can increase or decrease the number of detector units according to the coverage range and number of rows required by the user. It can be used universally by all models and is easy to mass-produce, greatly reducing costs.

[0019] 3) The present invention makes CT product design more flexible and can be used for both low-end and medium-end simple linear detectors and high-end curved detectors. The coverage range can be easily expanded, and the detector system structure is simple and low-cost.

[0020] 4) The detector module of the present invention can be pulled out or pushed back along the horizontal linear guide rail on the module base. The detector module is accurately positioned. During the installation process, the position of the detector unit can be automatically adjusted by the horizontal linear guide rail, and the installation accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional diagram of a combinable and expandable detector system according to an embodiment of the present invention;

[0022] Figure 2 This is a diagram of the internal structure of a combinable and expandable detector system in an embodiment of the present invention;

[0023] Figure 3 is a diagram of the extracted state of the detector module in the detector system according to an embodiment of the present invention;

[0024] Figure 4 is a diagram of a single detector module in an extracted state in an embodiment of the present invention;

[0025] Figure 5 is an internal structure diagram of a single detector module in an embodiment of the present invention;

[0026] Figure 6 is a three-dimensional diagram of a single detector module in an embodiment of the present invention;

[0027] Figure 7 is a perspective view of a single detector module in a 256-row detector system according to an embodiment of the present invention;

[0028] Figure 8 is a perspective view of a single detector module in a 320-row detector system according to an embodiment of the present invention;

[0029] The specific meanings of the reference numerals in the accompanying drawings are:

[0030] 1-detector module, 101-detector unit, 102-unit track, 103-heat sink, 104-support plate, 105-data processing board, 106-module base, 107-protective plate, 2-mounting shell, 201-top cover plate, 202-bottom shell, 203-front shell, 204-integrated board fixing plate, 3-air inlet, 4-base plate, 5-connecting plate. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0032] Example:

[0033] This example uses a detector system that can be expanded to a maximum of 12×32=384 rows in the slice thickness direction and a coverage area of ​​384×0.625=240mm as an example. This system can form a mid-to-high-end CT product series with 64 rows, 128 rows, 192 rows, 256 rows, 320 rows, and 384 rows. By replacing the unit track and the number of detector unit channels on it, it can be further expanded to the ultra-high end or the low end.

[0034] Combine Figure 1-6As shown, the present invention discloses a combinable and expandable detector system, including a detector module 1, wherein the detector module 1 includes a module base 106, a detector unit 101 and a unit rail 102, and 12 groups of detector units 101 are arranged in a row along the arc surface on the unit rail 102, and are detachably fixed to the unit rail 102, and a guide groove is provided at the bottom of the unit rail 102, and a horizontal linear guide rail is provided on the module base 106, and a clearance fit is adopted between the guide groove and the horizontal linear guide rail, and the unit rail 102 is slidable along the horizontal linear guide rail direction of the module base 106, so that the disassembly and installation of the detector module become simple during maintenance, and there is no need to disassemble or install screws multiple times. The detector module can be disassembled or installed and positioned by pulling out or pushing back the detector module, which greatly simplifies the maintenance steps and reduces the maintenance time.

[0035] The lower surface of the horizontal linear guide rail is provided with a vertical flange extending vertically downward. The vertical flange and the horizontal linear guide rail form a T-shaped support structure. This structure not only ensures the overall strength of the detector module, but also enhances the heat dissipation performance of the detector unit by adding heat sinks on both sides of the T-shaped support structure.

[0036] Two removable fastening screws are provided at both ends of the unit rail 102 to fix the relative position of the unit rail 102 and the horizontal linear guide rail. When disassembling, only the two screws at both ends of the unit rail need to be removed to pull out the detector module, which not only ensures that the detector unit is installed firmly, but also avoids the use of a large number of screws, which makes disassembly cumbersome.

[0037] A heat sink 103 is provided on each side of the vertical flange, and the fin part of the heat sink 103 is in close contact with the surface of the vertical flange. A large amount of heat generated by the detector unit 101 is transferred to the T-shaped support structure through the unit rail 102. The heat accumulated on the T-shaped support structure can be dissipated through the heat sink 103 in close contact with both sides of the T-shaped support structure and discharged to the outside of the equipment through air flow, thereby preventing the detector system from overheating and damaging the machine.

[0038] The detector module 1 also includes a data processing board 105, a support plate 104 and a protective plate 107. The data processing board 105 is fixed on the heat sink 103 on one side. The unit rail 102, the heat sink 103 and the data processing board 105 are fixedly connected by the support plates 104 at both ends of the module base 106 and are wrapped into one by the protective plate 107.

[0039] The bottom of the detector unit 101 is fixedly connected to a mounting base, and the mounting base is provided with a raised portion extending vertically downward, and the raised portion is provided with a fixing hole; the unit rail 102 is provided with a threaded hole that matches the fixing hole of the mounting base, and the mounting base is fixed to the unit rail 102 by passing a fastening screw through the fixing hole and the threaded hole. When disassembling the detector unit 101, it is only necessary to remove the fastening screws of the corresponding damaged detector unit, replace it with an intact detector unit, and then reinstall the fastening screws.

[0040] The detector unit 101 uses a rectangular micro-flat panel detector with 32×32 array channels, that is, each detector unit 101 has 32 rows. By increasing or decreasing the number of detector units 101 along the unit track 102, the number of rows of the detector module 1 can be expanded or contracted.

[0041] The detector system in the present invention includes a substrate 4 and a connecting plate 5. Multiple groups of detector modules 1 are arranged in sequence according to a certain arc (the radius distance is the distance from the focus to the detection crystal). One end of the module base 106 is vertically fixed to the surface of the substrate 4 by a detachable fastener, and the other end is fixed together by the connecting plate 5, so that X-rays can be equidistantly and vertically incident on the detection crystal surface in the detector module, avoiding artifacts and distortion in the detection image, which affects clinical diagnosis.

[0042] The detector system in the present invention also includes an installation shell 2 and an air inlet assembly. The installation shell 2 is a hollow cavity formed by a fixed connection of an integration plate fixing plate 204, a bottom shell 202, a front shell 203 and a top cover plate 201. The integration plate fixing plate 204 is provided with a data integration board for integrating the data line connecting the detector module 1; the surface of the front shell 203 is provided with a plurality of air inlets 3, and the air inlet assembly (not marked in the figure) is fixedly arranged at each air inlet. A good ventilation channel is formed by the installation shell, and in conjunction with the air inlet assembly, a ventilation flow with an extremely fast flow rate is formed in the cavity, thereby reducing the temperature inside the cavity.

[0043] Based on the above structure, the detector system of the present invention can be formed into detector systems with different numbers of rows and different coverages by expanding or contracting the number of detector units to meet different usage requirements, such as Figure 7 As shown in , by reducing the number of single detector units in the detector module to 8 groups, a 256-row detector system can be obtained; Figure 8 As shown, by reducing the number of single detector units in the detector module to 10 groups, a detector system with 320 rows can be obtained.

[0044] In addition, the present invention also discloses a method for repairing a detector unit, which comprises the following steps:

[0045] S01. Remove the top cover and front housing;

[0046] S02. Loosen the two removable fastening screws on the unit track of the detector module to be repaired, and remove the screws connecting the module to the adjacent module;

[0047] S03. Unplug the data cable of the detector module to be repaired and plugged into the data integration board;

[0048] S04. Slide the detector module to be repaired outward along the unit track direction;

[0049] S05. Remove the protective plate of the detector module to be repaired, remove the faulty detector unit, and replace it with a good detector unit;

[0050] S06. Replace the protective plate, align the detector module with the horizontal linear guide removed from the module base, and push it back along the unit track. Reinsert the data cable, tighten the two removable fastening screws on the unit track, and use the connecting plate to connect the detector module to the adjacent module.

[0051] S07.Reinstall the top cover and front cover.

[0052] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A combinable and expandable detector system, comprising detector modules, characterized by: The detector module includes a module base, a detector unit and a unit track. The detector unit can be detachably fixed on the unit track. A guide groove is provided at the bottom of the unit track. A horizontal linear guide rail is provided on the module base. A clearance fit is adopted between the guide groove and the horizontal linear guide rail. The unit track can be slidably displaced along the direction of the horizontal linear guide rail in the module base.

2. The detector system according to claim 1, characterized in that: A vertical flange extending vertically downward is provided on the lower surface of the horizontal linear guide rail, and the vertical flange and the horizontal linear guide rail form a T-shaped support structure.

3. The detector system according to claim 2, characterized in that: Both ends of the unit rail are provided with detachable fastening screws to fix the relative position of the unit rail and the horizontal linear guide rail.

4. The detector system according to claim 3, characterized in that: Heat sinks are respectively provided on both sides of the vertical flange, and the fin parts of the heat sinks are in close contact with the surface of the vertical flange.

5. The detector system according to claim 4, characterized in that: The detector module also includes a data processing board, a support plate and a protective plate. The data processing board is fixed on a heat sink on one side. The unit rail, the heat sink and the data processing board are fixedly connected through the support plates located at both ends of the module base and are wrapped into one by the protective plate.

6. The detector system according to claim 5, characterized in that: The bottom of the detector unit is fixedly connected to a mounting base, the mounting base is provided with a convex portion extending vertically downward, and the convex portion is provided with a fixing hole.

7. The detector system according to claim 6, characterized in that: The unit rail is provided with a threaded hole that matches the fixing hole of the mounting base, and the mounting base is fixed to the unit rail by fastening screws passing through the fixing hole and the threaded hole.

8. The detector system according to claim 7, characterized in that: The detector unit adopts a rectangular micro-flat panel detector with 32×32 array channels.

9. The detector system according to claim 8, characterized in that: It includes a base plate and a connecting plate. Multiple groups of detector modules are arranged in sequence according to a certain arc. One end of the module base is vertically fixed to the surface of the base plate through a detachable fastener, and the other end is fixedly connected together through the connecting plate.

10. The detector system according to claim 9, characterized in that: It also includes an installation shell and an air inlet assembly. The installation shell is a hollow cavity composed of an integration plate fixing plate, a bottom shell, a front shell and a top cover plate fixedly connected. The integration plate fixing plate is provided with a data integration plate connected to the detector module data cable; the front shell surface is provided with multiple air inlets, and the air inlet assembly is fixedly installed at each air inlet.

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