Static CT detector module and corresponding whole-ring detector

Abstract

The utility model discloses a static CT detector module and a corresponding whole ring detector. The static CT detector module comprises a detector frame, a mounting bracket, a fan module, a detector module, a protection block module, a cable module, a circuit board module, a first shell, a second shell, a third shell and a fourth shell. And the fourth shell and the second shell are contacted and connected with the left side and the right side of the mounting bracket. And the third shell is arranged on the lower side of the detector module and covers the mounting bracket and the circuit board module. The first shell is arranged on the upper side of the detector module and covers the circuit board module. According to the detector module of the static CT provided by the utility model, the edge module crystal can be prevented from being scratched and damaged when the detection plate module is disassembled and assembled. And the operation process is straight up and down, so that field personnel are supported to directly complete overhaul, maintenance and replacement of each circuit board in the module on a rack.

Description

Technical Field

[0001] The utility model relates to a detector module for static CT and also relates to a full-ring detector composed of the detector module, belonging to the technical field of medical equipment. Background Art

[0002] Static CT uses a dual-ring mechanical geometry consisting of a detector ring and a radiation source ring. The radiation source ring is equipped with dozens to hundreds of radiation source focal points, while the detector ring is equipped with a full ring of detectors, so that the X-rays emitted by each radiation source focal point can be imaged by the detector on the opposite side.

[0003] In the Chinese utility model with patent number ZL 202122717505.8, a CT machine detector structure that is easy to maintain is disclosed. The solution includes a rotating bracket and a detector module, and the rotating bracket is divided into a plurality of accommodating spaces at equal intervals along the circumferential direction. The rotating bracket includes an outer ring and an inner ring. The inner ring is provided with a first threaded hole, and the detector module is provided with multiple detector modules. The multiple detector modules are respectively arranged in the multiple accommodating spaces of the rotating bracket, and are respectively detachably connected to the first threaded holes of the inner ring by first connecting bolts. The multiple detector modules form a full ring of detectors on the rotating bracket, and each detector module is detachably connected to the rotating bracket by a first connecting bolt. When a detector module fails, the detector module is conveniently disassembled and maintained.

[0004] The detector ring of a static CT system differs significantly from that of a traditional CT system. It requires the installation of detectors throughout the ring, which can cause damage to the edge module crystals during installation and maintenance. Therefore, while ensuring easy replacement of individual detectors, it also requires easy access to the internal circuit boards for system upgrades. Summary of the Invention

[0005] The primary technical problem to be solved by the present invention is to provide a detector module for static CT.

[0006] Another technical problem to be solved by the present invention is to provide a complete ring detector composed of the above detector modules.

[0007] According to a first aspect of an embodiment of the present invention, a detector module for static CT is provided, comprising a mounting bracket, a fan module, a detector module, a protection block module, a cable module, a circuit board module, a first shell, a second shell, a third shell, and a fourth shell; wherein,

[0008] The first shell, the second shell, the third shell and the fourth shell are thin support structures with mechanical strength; the fourth shell and the second shell are in contact with and connected to the left and right sides of the mounting bracket;

[0009] One end of the third shell contacts and is connected to the lower end of the fourth shell, and the other end contacts and is connected to the lower end of the second shell; the third shell is arranged on the lower side of the detector module, extends along the Z direction, and its projection along the Y direction covers the mounting bracket and the circuit board module;

[0010] One end of the first shell contacts and is connected to the third shell, and contacts the upper end of the fourth shell and the upper end of the second shell; the first shell is arranged on the upper side of the detector module, extends along the Z direction, and its projection along the Y direction covers the circuit board module;

[0011] The first shell, the second shell, the third shell and the fourth shell do not block the light-receiving surface of the detector module.

[0012] Preferably, the mounting bracket includes a front vertical plate, an arc plate and a rear vertical plate; wherein,

[0013] The arc plate is an arc-shaped flat plate structure, arranged parallel to the arc surface of the CT scanning cavity; one end of the arc plate along the Z direction is connected to the upper end of the front vertical plate, and the other end is connected to the rear vertical plate; the front vertical plate and the rear vertical plate are parallel to each other and arranged along a direction parallel to the XY plane; the front vertical plate extends in a direction away from the arc axis of the arc plate;

[0014] The front vertical plate includes a plurality of fan holes, and the air duct of the fan module is connected to the fan holes; the arc plate includes a plurality of processing plate holes.

[0015] Preferably, the detector module includes a detection board and a processing board; wherein,

[0016] The detection plate includes a plurality of sub-plates, and is an arc-shaped flat plate structure formed by splicing the plurality of sub-plates; the arc axis of the detection plate is coaxial with the axis of the scanning cavity of the CT device, the curvature of the detection plate is not less than the curvature of the arc plate, and the arc radius thereof is not greater than the arc radius of the arc plate;

[0017] The processing board is a sheet-like thin plate, extending from the non-light-receiving surface of the sub-board in a direction away from the detection board; a plurality of the processing boards corresponds to a plurality of the sub-boards.

[0018] Preferably, the non-light-receiving surface of the detection plate contacts the inner circumferential surface of the arc plate, and the processing plate passes through the processing plate hole.

[0019] Preferably, the protection block module is higher than the light-receiving surface of the detection plate, and its arc radius is not greater than the arc radius of the detection plate.

[0020] Preferably, the cable module connects the detector module and the circuit board module to achieve electrical connectivity.

[0021] Preferably, the circuit board module includes a circuit board, a bracket and a hinge; wherein,

[0022] The circuit board is designed to transmit and process signals between the detector module and the host computer; the bracket is a structure capable of supporting and fixing the circuit board, and one end of the bracket is rotatably connected to the hinge; the circuit board is connected to the lower surface of the bracket.

[0023] Preferably, the circuit board and the bracket extend along the Z direction; the projection of the bracket along the Y direction covers the circuit board;

[0024] One end of the bracket is in contact with and connected to the rear vertical plate.

[0025] Preferably, the circuit board module is arranged in the Z direction of the detector module, and their projections in the Y direction do not overlap.

[0026] According to a second aspect of an embodiment of the present utility model, a full-ring detector composed of the above-mentioned detector modules is provided, comprising a detector rack and detector modules; the detector rack is a ring structure, and a plurality of the detector modules are arranged in a ring along the circumferential direction of the detector rack, covering the scanning direction of static CT.

[0027] This utility model combines multiple CT detectors, circuit boards, cables, and structural support components into a detector module, facilitating modular assembly. The detector module's internal layout is layered, with both vertical and horizontal sections, significantly reducing the risk of damage during installation while ensuring the maintainability of the module's internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a full-ring detector for static CT in the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the detector module;

[0030] Figure 3 for Figure 2 Explosion diagram of the detector module in the figure;

[0031] Figure 4 for Figure 1 Schematic diagram of the right side of the full ring detector in . DETAILED DESCRIPTION

[0032] The technical content of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The technical concept of the present invention is as follows: a static CT detector ring 100 comprises multiple detector modules 11 and a detector rack 12, each of which can be independently installed and removed from the detector rack 12. The various device components within the detector modules 11 employ a stacked structure, enabling component replacement and inspection directly on the detector rack 12. It should be noted that for CT equipment, the Z direction is the direction of movement of the scanning bed, the Y direction is the vertical direction, and the X direction is the horizontal direction.

[0034] like Figure 1 As shown, the full-ring detector 100 provided in an embodiment of the present invention includes multiple detector modules 11 and a detector housing 12. The detector housing 12 is annular in structure, and the multiple detector modules 11 are arranged in a ring along the circumference of the detector housing 12, covering the 360° scanning direction of static CT. This embodiment uses the full-ring detector 100 as an example, including eight detector modules 11. Those skilled in the art will appreciate that the number of detector modules 11 is not limited to that shown in this embodiment.

[0035] like Figure 2 and Figure 3 As shown, the detector module 11 provided in the embodiment of the present invention includes a mounting bracket 1, a fan module 2, a detector module 3, a fourth housing 4, a protection block module 5, a cable module 6, a first housing 7, a circuit board module 8, a second housing 9, and a third housing 10. The mounting bracket 1 serves as the mounting base and structural support for the fan module 2 and the detector module 3.

[0036] The mounting bracket 1 includes a front vertical plate 110, an arc plate 120 and a rear vertical plate 130. The arc plate 120 is arranged parallel to the arc surface of the scanning cavity of the CT device. The arc plate 120 is an arc-shaped flat plate structure, and the arc axis is coaxial with the axis of the full-ring detector 100. One end of the arc plate 120 along the Z direction is connected to the upper end of the front vertical plate 110, and the other end is connected to the rear vertical plate 130. The front vertical plate 110 and the rear vertical plate 130 are parallel to each other and arranged along the radial direction of the full-ring detector 100 (parallel to the XY plane). The arrangement of the front vertical plate 110 is to extend from one end of the arc plate 120 to the direction of the arc axis away from the arc plate 120. The front vertical plate 110 includes a plurality of fan holes 111 for installing the fan module 2. The arc plate 120 includes a plurality of processing board holes 121 for installing the detector module 8.

[0037] The fan module 2 is a heat dissipation module composed of a single fan or multiple fans, and is used to provide heat dissipation airflow for the detector module 11 .

[0038] The detector module 3 includes a detection plate 310 and a processing plate 320. The detection plate 310 is an arc-shaped flat plate structure formed by splicing multiple sub-plates 311 (not shown in the figure), which is used to receive X-rays from static CT. The arc axis of the detection plate 310 is coaxial with the axis of the full-ring detector 100, the arc is not less than the arc of the arc plate 120, and the arc radius is not greater than the radius of the arc plate 120, so that the distance from the static CT ray source to each point on the detection plate 310 is the same. The processing plate 320 is a sheet-like thin plate, extending from the non-light-receiving surface (back side) of the sub-plate 311 in the direction of the arc axis away from the detection plate 310. Multiple processing plates 320 correspond to multiple sub-plates 311. Multiple processing plates 320 are separated by preset distances and angles to form a grid-shaped detector module 3. The processing plate 320 is used to convert the rays received by the detection plate 310 into electrical signals and transmit them to the host computer.

[0039] The protection block module 5 includes a plurality of arc-shaped strips, and the arc radius of the protection block module 5 is not greater than the arc radius of the detection plate 310 .

[0040] The cable module 6 includes electrical wires and connectors, and is used to connect the detector module 3 and the circuit board module 8 to achieve electrical connectivity.

[0041] The circuit board module 8 includes one or more circuit boards 810, a bracket 820 and a hinge 830. Among them, the circuit board 810 is designed to transmit and process signals between the detector module 3 and the host computer. The bracket 820 is designed to be a structure capable of supporting and fixing the circuit board 810, and one end of the bracket 820 is rotatably connected to the hinge 830. The circuit board 810 and the bracket 820 both extend in the Z direction, and their projections in the Y direction overlap with each other. The circuit board 810 is connected to the lower surface of the bracket 820 (the surface away from the arc axis of the arc plate 120), so that the bracket 820 can protect the circuit board 810 from mechanical damage from the scanning cavity direction of the CT device. In addition, by rotating the hinge 830 to flip the bracket 820, 810 can be exposed in the scanning cavity direction for inspection and upgrading.

[0042] The fourth housing 4 , the first housing 7 , the second housing 9 and the third housing 10 are thin support structures having mechanical strength.

[0043] The detector module 3 contacts the inner circumferential surface of the mounting bracket 1 to support and fix the detector module 3. Specifically, the non-light-receiving surface of the detection plate 310 contacts the inner circumferential surface of the arc plate 120, and the processing plate 320 passes through the processing plate hole 121. The protection block module 5 contacts the light-receiving side surface of the detection plate 310 and is higher than the surface, and the bending directions of the two are the same to protect the detector module 3 from mechanical damage. The upper and lower layered structure facilitates the direct disassembly and assembly of the detector module 3 and any one of the sub-boards 311 from the inner circumferential direction without moving the detector module 11. Because the sub-board 311 can be disassembled and assembled from the inner circumferential direction, the disassembly and assembly process can prevent the light-receiving crystals at the edge of the sub-board 311 from being scratched and damaged, which is conducive to the development of on-site maintenance work.

[0044] The circuit board 810 contacts and connects to the lower surface of the bracket 820, supporting and securing the circuit board 810. One end of the bracket 820 contacts and connects to the rear vertical panel 130, forming a mutually supporting structure. The other end of the bracket 820 contacts and connects to the hinge 830, forming a reversible structure. One end of the cable module 6 connects to the circuit board 810, and the other end connects to the processing board 320. The fan module 2 contacts and connects to the front vertical panel 110. The air duct of the fan module 2 communicates with the fan hole 111, blowing air through the processing board 320.

[0045] Preferably, the circuit board module 8 is arranged in the Z direction of the detector module 3, and their projections in the Y direction do not overlap, forming a front-to-back partition arrangement. This arrangement facilitates maintenance operations, as the circuit board module 8 can be exposed without loosening the detector module 3, making it easier to upgrade and repair the circuit board module 8.

[0046] One end of the fourth housing 4 contacts and connects to the same side of the front and rear vertical panels 110, 130 in the X direction, that is, to one side of the mounting bracket 1 in the X direction. The second housing 9 contacts and connects to the other side of the front and rear vertical panels 110, 130, that is, to the other side of the mounting bracket 1 in the X direction. The fourth housing 4 and the second housing 9 form a structure that surrounds and supports the mounting bracket 1 from both sides.

[0047] One end of the third housing 3 contacts and connects to the lower end of the fourth housing 4, while the other end of the third housing 3 contacts and connects to the lower end of the second housing 9. The third housing 3 is positioned below the detector module 11, extending in the Z direction. Its projection in the Y direction covers the mounting bracket 1 and the circuit board module 8. This structure surrounds and supports the mounting bracket 1 and the circuit board module 8 from the bottom (outer circumference).

[0048] One end of the first shell 7 is in contact with and connected to the third shell 10, and is in contact with the upper end of the fourth shell 4 and the upper end of the second shell 9. The first shell 7 is arranged on the upper side of the detector module 11, extending along the Z direction, and its projection along the Y direction covers the circuit board module 8, forming a structure that covers the circuit board module 8 from above (inner circumference side). It is worth noting that the fourth shell 4, the first shell 7, the second shell 9 and the third shell 10 do not cover or block the light-receiving surface of the detection plate 310, and do not affect the detection plate 310 from being irradiated by the radiation source.

[0049] The detector module 11 is a modular unit with an independent outline. Figure 1 As shown, multiple detector modules 11 are sequentially arranged along the circumference of a detector rack 12, each contacting and connecting to the inner circumferential surface of the detector bracket 12, forming a full-ring detector 100 provided by an embodiment of the present utility model. The detector module 3 receives radiation from a radiation source, converts the optical signal into an electrical signal, and transmits it to the circuit board module 8 via the cable module 6. The fan module 2 provides cooling airflow for the detector module 11, and the protective block module 5 protects the light-receiving surface of the detector module 3. The fourth housing 4, the first housing 7, the second housing 9, and the third housing 10 form a protective housing for the detector module 11.

[0050] like Figure 4 As shown, when the detector module 11 is installed and removed from the detector rack 12, its modular structure has an independent profile, so it can protect the light-receiving crystals at the edge of the detector module 3 from being scratched and damaged. Because the detector module 11 adopts a stacked structure, the operation process is straight up and down, so after removing the first shell 7, the circuit board module 8 can be exposed, and the circuit board module 8 can be directly inspected, repaired and upgraded on the detector rack 12 without removing the detector module 11 from the detector rack 12. If the connection structure between the circuit board module 8 and the third shell 10 is removed, the circuit board module 8 is flipped from the hinge 830 to expose the circuit board 810 toward the scanning cavity, and the interior of the detector module 11 can be operated.

[0051] For example, if the firmware of the circuit board 810 needs to be upgraded, the detector module does not need to be removed from the detector frame. Instead, the first housing 7, the connection structure between the bracket 820 and the second housing 9 or the fourth housing 4, and the connection structure between the bracket 820 and the rear panel 130 can be removed. The circuit board module 8 can then be flipped over using the hinge 830, exposing the circuit board 810 and its maintenance and upgrade interface upward. Without the circuit board 810 and bracket 820 blocking the view, the processing board 320 is also exposed, facilitating on-site inspection and maintenance.

[0052] In summary, the present invention provides a detector module for static CT and a corresponding full-ring detector. The full-ring detector consists of modular detector modules and a rack. Multiple detector modules are assembled into a full-ring detector, facilitating assembly and disassembly of individual modules and spot inspection. The detector module utilizes a top-to-bottom layered, front-to-back partitioned structure, which prevents damage to the edge module crystals from scratches during assembly and disassembly of the detection board module. Furthermore, because the operation is straightforward, on-site personnel can perform inspection, maintenance, and replacement of the module's internal circuit boards directly on the rack.

[0053] It should be noted that the above embodiments are only examples, and the technical solutions of the various embodiments can be combined, all of which are within the protection scope of the present utility model.

[0054] The terms "upper", "lower", "horizontal", "vertical", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0056] The above describes in detail the detector module and corresponding full-ring detector for static CT provided by this utility model. For those skilled in the art, any obvious modification to this utility model without departing from the essence of this utility model will constitute an infringement of the patent rights of this utility model and will result in corresponding legal liability.

Claims

1. A detector module for static CT, characterized in that It includes a mounting bracket, a fan module, a detector module, a protection block module, a cable module, a circuit board module, a first shell, a second shell, a third shell and a fourth shell; wherein, The first shell, the second shell, the third shell and the fourth shell are thin support structures with mechanical strength; the fourth shell and the second shell are in contact with and connected to the left and right sides of the mounting bracket; One end of the third shell contacts and is connected to the lower end of the fourth shell, and the other end contacts and is connected to the lower end of the second shell; the third shell is arranged on the lower side of the detector module, extends along the Z direction, and its projection along the Y direction covers the mounting bracket and the circuit board module; One end of the first shell contacts and is connected to the third shell, and contacts the upper end of the fourth shell and the upper end of the second shell; the first shell is arranged on the upper side of the detector module, extends along the Z direction, and its projection along the Y direction covers the circuit board module; The first shell, the second shell, the third shell and the fourth shell do not block the light-receiving surface of the detector module.

2. The detector module according to claim 1, characterized in that The mounting bracket includes a front vertical plate, an arc plate and a rear vertical plate; wherein, The arc plate is an arc-shaped flat plate structure, arranged parallel to the arc surface of the CT scanning cavity; one end of the arc plate along the Z direction is connected to the upper end of the front vertical plate, and the other end is connected to the rear vertical plate; the front vertical plate and the rear vertical plate are parallel to each other and arranged along a direction parallel to the XY plane; the front vertical plate extends in a direction away from the arc axis of the arc plate; The front vertical plate includes a plurality of fan holes, and the air duct of the fan module is connected to the fan holes; the arc plate includes a plurality of processing plate holes.

3. The detector module according to claim 2, characterized in that The detector module includes a detection board and a processing board; wherein, The detection plate includes a plurality of sub-plates, and is an arc-shaped flat plate structure formed by splicing the plurality of sub-plates; the arc axis of the detection plate is coaxial with the axis of the scanning cavity of the CT device, the curvature of the detection plate is not less than the curvature of the arc plate, and the arc radius thereof is not greater than the arc radius of the arc plate; The processing board is a sheet-like thin plate, extending from the non-light-receiving surface of the sub-board in a direction away from the detection board; a plurality of the processing boards corresponds to a plurality of the sub-boards.

4. The detector module according to claim 3, wherein: The non-light-receiving surface of the detection plate contacts the inner circumferential surface of the arc plate, and the processing plate passes through the processing plate hole.

5. The detector module according to claim 3, wherein: The protection block module is higher than the light-receiving surface of the detection plate, and its arc radius is not greater than the arc radius of the detection plate.

6. The detector module according to claim 3, wherein: The cable module connects the detector module and the circuit board module to achieve electrical connectivity.

7. The detector module according to claim 6, characterized in that The circuit board module includes a circuit board, a bracket and a hinge; wherein, The circuit board is designed to transmit and process signals between the detector module and the host computer; the bracket is a structure capable of supporting and fixing the circuit board, and one end of the bracket is rotatably connected to the hinge; the circuit board is connected to the lower surface of the bracket.

8. The detector module according to claim 7, wherein: The circuit board and the bracket extend along the Z direction; the projection of the bracket along the Y direction covers the circuit board; One end of the bracket is in contact with and connected to the rear vertical plate.

9. The detector module according to claim 8, wherein: The circuit board module is arranged in the Z direction of the detector module, and the projections of the two in the Y direction do not overlap.

10. A full-ring detector, comprising a detector frame and the detector module according to any one of claims 1 to 8, characterized in that: The detector rack is an annular structure, and the plurality of detector modules are arranged in an annular shape along the circumference of the detector rack, covering the scanning direction of the static CT.

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