CN115299972A - Detector module, shell thereof and detector array - Google Patents

Abstract

The application provides a detector module, a shell of the detector module and a detector array. The housing includes: the lower shell, the cover plate and the plurality of limiting pieces; the lower shell is provided with an accommodating cavity, the top of the accommodating cavity is provided with an opening, and the accommodating cavity is used for accommodating a functional module and limiting the moving distance of the functional module along the radial direction of the accommodating cavity; a plurality of limiting holes for the limiting sheets to pass through are formed in the side wall of the accommodating cavity; the cover plate is embedded in the opening of the lower shell, and a limit groove corresponding to the limit hole is formed in the side edge of the cover plate; each limiting piece is arranged in one limiting hole and the corresponding limiting groove and used for limiting the moving distance of the functional module along the axial direction of the accommodating cavity. The housing is used for detector modules to achieve a compact array or matrix arrangement of detector modules.

Description

Detector module, shell thereof and detector array

Technical Field

The application relates to the technical field of medical imaging, in particular to a detector module, a shell of the detector module and a detector array.

Background

SPECT (Single-Photon Emission Computed Tomography) is a technique for measuring biological activities of cells and molecules, and its basic imaging principle is: the patient is injected with the radioactive isotope medicine with proper half-life, after the medicine reaches the position of the human body to be imaged, gamma photons are emitted from the tissue of the human body due to radioactive decay, each scintillator of the gamma detector positioned at the outer layer detects the gamma photons coming in through the collimator along a projection line, the high-energy gamma rays detected by the scintillators are converted into optical signals with low energy and large quantity, the optical signals are converted into electric signals through the photomultiplier tube and amplified, and the obtained measured value represents the sum of the radioactivity of the human body on the projection line.

The traditional detector mostly adopts a PMT type photomultiplier tube, and the volume is extremely large. By replacing the PMT type photomultiplier tube with an SiPM chip including a silicon photomultiplier tube, higher detection efficiency and response speed can be achieved. Therefore, detector modules in the field of medical imaging technology require a tight array or matrix arrangement relative to the field of security checks and the like.

Therefore, a detector module, a housing thereof, and a detector array suitable for the medical imaging technology field are needed.

Disclosure of Invention

The application aims to provide a detector module, a shell of the detector module and a detector array, which are suitable for the technical field of medical imaging.

The purpose of the application is realized by adopting the following technical scheme:

in a first aspect, the present application provides a housing for a detector module, the housing comprising: the lower shell, the cover plate and the plurality of limiting pieces;

the lower shell is provided with an accommodating cavity, the top of the accommodating cavity is provided with an opening, and the accommodating cavity is used for accommodating the functional module and limiting the moving distance of the functional module along the radial direction of the accommodating cavity; a plurality of limiting holes for the limiting sheet to pass through are formed in the side wall of the accommodating cavity;

the cover plate is embedded in the opening of the lower shell, and a limit groove corresponding to the limit hole is formed in the side edge of the cover plate;

each limiting piece is arranged in one limiting hole and the corresponding limiting groove and used for limiting the moving distance of the functional module along the axial direction of the accommodating cavity.

The technical scheme has the beneficial effects that: the lower shell accommodates the functional module in the accommodating cavity, so that the movement of the functional module can be limited, and the integration level is high; the shell of the structure is used for the detector modules, and can realize more compact array or matrix arrangement of a plurality of detector modules; when a part of the functional module breaks down, technicians can replace the broken part, and cost is saved.

In conclusion, the shell of the detector module can be used for realizing high integration level of the detector module and is convenient for maintenance of the detector module; the shell is used for fixing the functional module by adopting the limiting hole, the limiting groove and the limiting sheet, no gap or small gap is formed on the side surface, the array or matrix arrangement of the detector modules can be more tightly carried out, and the silicon photomultiplier is suitable for silicon photomultiplier in the technical field of medical imaging.

In some optional embodiments, the cover plate includes a plurality of screws and threaded through holes for the screws to pass through, and each threaded through hole passes through one of the limiting grooves so that each screw locks the limiting piece in the corresponding limiting groove.

The technical scheme has the beneficial effects that: the screw makes the limiting function of the limiting sheet more stable. It can be understood that when the screw is screwed through the threaded through hole, the gap of the limiting groove along the axial direction of the screw is contracted, and the limiting sheet arranged in the limiting groove is further clamped; when the screw is detached from the cover plate through the threaded through hole, the gap of the limiting groove along the axial direction of the screw is not contracted under the action of the screw any more. The screw passes through the threaded through hole, so that the limiting sheet can be more stably arranged in the limiting hole and the corresponding limiting groove.

In some optional embodiments, 1 limiting plate through hole is provided on each limiting plate, so that each screw passes through the threaded through hole and the limiting plate through hole in sequence.

The technical scheme has the beneficial effects that: when the screw passes through the screw through hole, the screw simultaneously passes through the through hole of the limiting sheet. As long as the screw does not break away from the through hole of the limiting sheet, the limiting sheet cannot break away from the limiting groove. That is to say, the spacing piece can be fixed in the axial direction of the screw by reducing the clearance of the spacing groove through the matching of the screw and the spacing groove; and the movement of the limiting sheet in the radial direction of the screw can be limited by the matching of the screw and the limiting sheet through hole. Even if the limiting sheet in the limiting groove cannot be sufficiently clamped due to faults such as screw sliding and the like, the screw can limit the limiting sheet to be separated from the limiting groove. In conclusion, through the setting of the limiting sheet through hole, the stability of the shell for fixing the functional module is improved.

In some optional embodiments, the outer shell is a rectangular parallelepiped, and 2 limiting holes are respectively disposed on 4 side surfaces of the lower shell.

The technical scheme has the beneficial effects that: the cuboid shell is used for the detector modules, and when the detector modules are arranged in an array, the space utilization rate is high; when the shell is the cuboid and sets up 2 spacing holes respectively on every side of casing down, even if receive outside impact and vibrations, casing and apron are difficult to break away from, stability is better down.

In some optional embodiments, the housing further includes not less than 2 guide pins, each guide pin is disposed on an end surface of the cover plate away from the lower case, and the guide pins are used for positioning the detector module on the heat dissipation back plate.

The technical scheme has the beneficial effects that: on one hand, the positioning function can be provided through the guide pin, and the efficiency of technicians in the array arrangement of the detector modules is higher; on the other hand, when one or more detector modules of the detector break down, technicians can replace the broken-down detector modules more simply, and the detectors are convenient to maintain by the technicians.

In some alternative embodiments, the cover plate is made of a thermally conductive material.

The technical scheme has the beneficial effects that: when the detector module is positioned and installed on the heat dissipation backboard, the cover plate is reused for the heat dissipation component, and the heat inside the detector is led out to the outside (the heat dissipation backboard). That is to say, multiplexing the apron, need not to dispose the heat dissipation part for the shell alone, can reduce the volume and the weight of shell, reduce the manufacturing cost and the design degree of difficulty of shell.

In some optional embodiments, the inner wall of the accommodating cavity is made of carbon fiber or black polymer material.

The technical scheme has the beneficial effects that: the inner wall of the carbon fiber or black polymer material does not reflect light, so that the inner wall of the accommodating cavity is shielded from light for the functional module when the inner wall of the accommodating cavity is made of the carbon fiber or black polymer material. Compare and carry out the light-resistant through the means of masking paper or encapsulation to some or whole parts in the functional module respectively, through the selection to shells inner wall material down, with the multiplexing light-resistant for functional module of casing down, and what realize is whole light-resistant, the effect is better. In conclusion, the inner wall of the carbon fiber or black high polymer material realizes the integral light-shielding of the functional module; the lower shell is reused with a light-shielding function, so that the volume and the manufacturing cost of the shell are saved.

In a second aspect, the present application provides a detector module, comprising:

the housing of any of the first aspects, the housing comprising: the lower shell, the cover plate and the plurality of limiting pieces; the lower shell is provided with a containing cavity,

the functional module, functional module is including scintillator, photoelectric conversion unit and the position coding unit that stacks gradually the setting, functional module set up in the intracavity that holds of casing down, just the scintillator set up in hold at the bottom of the chamber in chamber.

The technical scheme has the beneficial effects that: the scintillator is arranged at the bottom of the accommodating cavity, so that the detected high-energy rays can be conveniently converted into optical signals with low energy but large quantity and then output; the photoelectric conversion unit converts the optical signal output by the scintillator into an amplified electrical signal and outputs the amplified electrical signal; the position coding unit receives the electric signal output by the photoelectric conversion unit and performs position coding; the scintillator, the photoelectric conversion unit and the position coding unit are arranged in a stacked mode, so that the size of the functional module is reduced, and the space occupation is obviously reduced; the lower shell accommodates the functional module in the accommodating cavity, so that the movement of the functional module can be limited, and the integration level is high; the limiting holes and the limiting grooves are matched with limiting pieces, so that the cover plate is fixed on the lower shell, no gap or small gap exists on the side surface of the shell, the detector modules with the structure can be arranged in an array or matrix more closely, and the overall sensitivity of the detector is improved; when a part of the functional module breaks down, technicians can replace the broken part, and cost is saved.

In conclusion, the detector module has high integration level, good independence and convenient maintenance and replacement; the shell is fixed to the functional module by the aid of the limiting holes, the limiting grooves and the limiting sheets, gaps are not formed in the side faces or small in gaps, and array or matrix arrangement can be performed more closely.

In some optional embodiments, the functional module further comprises a flexible light guide adhered between the scintillator and the photoelectric conversion unit, the flexible light guide for enabling optical coupling of the scintillator and the photoelectric conversion unit.

The technical scheme has the beneficial effects that: the conduction of the optical signal between the scintillator and the photoelectric conversion unit can be achieved by a flexible light guide. When the scintillator and/or the photoelectric conversion unit are vibrated or impacted, the flexible light guide adhered between the scintillator and the photoelectric conversion unit plays a role in buffering, so that the fault rate of the detector module is reduced, and the stability of the detector module is improved.

In some alternative embodiments, the detector module further comprises a reflective sheet, an aerogel layer, and a flexible thermal insulating sheet, which are sequentially stacked;

the reflector plate is arranged on the end face, far away from the cover plate, of the position coding unit and used for reflecting heat radiation generated by the position coding unit;

the air-gel layer is used for insulating heat transfer between the reflection sheet and the photoelectric conversion unit;

the flexible heat insulation sheet is arranged between the photoelectric conversion unit and the aerogel layer and used for isolating heat transfer between the photoelectric conversion unit and the aerogel layer.

The technical scheme has the beneficial effects that: the reflector plate can reflect the heat radiation generated by the position coding unit, so that the heat generated by the position coding unit is prevented from being transferred to the photoelectric conversion unit and the scintillator in the form of heat radiation; the air gel layer is a composite product made of glass and plastic, has low heat conductivity, and can avoid heat transfer between the position coding unit and the photoelectric conversion unit; the flexible heat insulation sheet is made of flexible materials, on one hand, the flexible heat insulation sheet has a heat insulation function between the position coding unit and the photoelectric conversion unit, and on the other hand, the flexible heat insulation sheet is arranged between the photoelectric conversion unit and the aerogel layer to play a flexible buffering role.

The connector of the photoelectric conversion unit and the connector of the position coding unit realize the transmission of electric signals between the photoelectric conversion unit and the position coding unit, so that a certain gap is formed between the photoelectric conversion unit and the position coding unit, the gaps can be filled through the stacked reflection sheet, the air gel layer and the flexible heat insulation sheet, the heat radiation and the heat transfer between the position coding unit and the photoelectric conversion unit are isolated, and the utilization ratio of the space of the shell is high.

To sum up, the reflector plate, the air gel layer and the flexible heat insulation sheet are stacked, so that the space utilization rate of the detector module is improved, and the thermal crosstalk among the scintillator, the photoelectric conversion unit and the position coding unit is avoided.

In a third aspect, the present application provides a detector array comprising:

a plurality of detector modules of any of the second aspect, the housing of each detector module comprising no less than 2 guide pins;

the heat dissipation device comprises a heat dissipation back plate, a plurality of positioning holes and a plurality of positioning pins, wherein the heat dissipation back plate is provided with the plurality of positioning holes, and the positioning holes are used for accommodating the guide pins of each detector module and positioning each detector module;

wherein a plurality of the detector modules are arranged in an array or matrix.

The technical scheme has the beneficial effects that: the detector modules in the detector array are arranged more closely, and the sensitivity of the detector is improved.

Drawings

The present application is further described below with reference to the drawings and examples.

FIG. 1 is a schematic structural diagram of a detector module provided herein;

FIG. 2 is an exploded view of a detector module provided herein;

FIG. 3 is a cross-sectional view of a detector module provided herein;

FIG. 4 is a cross-sectional view of another angle of a detector module provided herein.

In the figure, 100, the housing; 110. a lower housing; 120. a cover plate; 130. a limiting sheet; 111. a limiting hole; 121. a limiting groove; 122. a screw; 123. a threaded through hole; 140. a guide pin; 200. a functional module; 210. a scintillator; 220. a photoelectric conversion unit; 230. a position encoding unit; 240. a flexible light guide; 250. a reflective sheet; 260. an air-gel layer; 270. a flexible thermal insulation sheet; 221. a carrier plate; 222. a silicon photovoltaic circuit.

Detailed Description

The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.

In the present application, the scintillator, the photoelectric conversion unit, the position encoding unit, the flexible light guide, the reflective sheet, the aerogel layer, the flexible thermal insulating sheet may be regarded as being flat and having a certain physical thickness. The side surface of the cover plate can be regarded as the surface between the opposite top surface and the bottom surface, the top surface of the cover plate can be regarded as the surface of the cover plate far away from the bottom wall of the accommodating cavity, and the bottom surface can be regarded as the surface opposite to the top surface.

The photoelectric conversion unit may include a carrier plate and a silicon photoelectric circuit, the silicon photoelectric circuit may include a silicon photoelectric conversion chip (SiPM chip), and the SiPM chip may include a silicon photomultiplier.

When the detector works, the gamma rays are converted into optical signals by the scintillator, and the optical signals are converted into electric signals by the photoelectric conversion unit through the SiP M chip. The photoelectric conversion unit and the position coding unit are electrically connected with a connector of the board through the board, and the position coding circuit processes the electric signal transmitted by the photoelectric conversion unit to carry out position coding.

Example one

Referring to fig. 1 to 4, fig. 1 shows a schematic structural diagram of a detector module provided in the present application;

FIG. 2 illustrates an exploded view of a detector module provided herein; FIG. 3 illustrates a cross-sectional view of a detector module provided herein; FIG. 4 illustrates another angled cross-sectional view of a detector module provided herein.

The detector module includes:

functional module 200, functional module 200 is including the scintillator 210, photoelectric conversion unit 220 and the position coding unit 230 that stack gradually the setting, functional module 200 set up in the intracavity that holds of lower casing 110, just scintillator 210 set up in hold the chamber at the bottom of the chamber.

A housing 100, said housing 100 comprising: the lower case 110, the cover plate 120, and a plurality of stopper pieces 130;

the lower housing 110 is provided with an accommodating cavity, the top of the accommodating cavity is provided with an opening, and the accommodating cavity is used for accommodating the functional module 200 and limiting the movement distance of the functional module 200 along the radial direction of the accommodating cavity; a plurality of limiting holes 111 for the limiting sheet 130 to pass through are formed in the side wall of the accommodating cavity;

the cover plate 120 is embedded in the opening of the lower housing 110, and a limiting groove 121 corresponding to the limiting hole 111 is formed in a side edge of the cover plate 120;

each of the limiting pieces 130 is disposed in one of the limiting holes 111 and the corresponding limiting groove 121, and is configured to limit a moving distance of the functional module 200 along the axial direction of the accommodating cavity.

Therefore, the scintillator 210 is arranged at the bottom of the accommodating cavity, so that the detected high-energy rays can be converted into optical signals with low energy but large quantity and output conveniently; the photoelectric conversion unit 220 converts the optical signal output by the scintillator 210 into an amplified electrical signal and outputs the amplified electrical signal; the position encoding unit 230 receives the electrical signal output by the photoelectric conversion unit 220 and performs position encoding; the scintillator 210, the photoelectric conversion unit 220 and the position encoding unit 230 are stacked, so that the volume of the functional module 200 is reduced, and the space occupation is obviously reduced; the lower case 110 accommodates the functional module 200 in the accommodation cavity, and can limit the movement of the functional module 200, so that the integration level is high; the limiting hole 111 and the limiting groove 121 are matched with the limiting sheet 130, so that the cover plate 120 is fixed on the lower shell 110, no gap or small gap is formed on the side surface of the shell 100, the detector module with the structure can be arranged in an array or matrix of the detector more closely, and the overall sensitivity of the detector is improved; when a part in the functional module 200 is failed, a technician can replace the failed part, so that the cost is saved.

In conclusion, the detector module has high integration level, good independence and convenient maintenance and replacement; the shell 100 is fixed to the functional module 200 by using the limiting hole 111, the limiting groove 121 and the limiting sheet 130, and the array or matrix arrangement of the detectors can be performed more closely without gaps or with small gaps on the side surface.

In one embodiment, the limiting sheet 130 can be used to fix the cover plate 120 on the lower housing 110 more firmly through an interference fit with the limiting groove 121 and the limiting hole 111.

In another embodiment, the position-limiting sheet 130 can fix the cover plate 120 on the lower housing 110 more firmly by magnetic force between the position-limiting groove 121 and the position-limiting hole 111. For example, the position-limiting sheet 130 is a strong magnet, the position-limiting groove 121 and the position-limiting hole 111 include a ferrous material for strong magnet adsorption, and the position-limiting sheet 130 is fixed to the position-limiting groove 121 and the position-limiting hole 111 by magnetic force. For another example, the position-limiting pieces 130, the position-limiting grooves 121, and the position-limiting holes 111 are all made of strong magnets, and the cover plate 120 can be fixed to the lower case 110.

The limiting groove 121 may be a groove-shaped gap annularly formed on the side edge of the cover plate 120; the limiting groove 121 may also be a plurality of groove-shaped gaps that are not communicated and are disposed on the side edge of the cover plate 120, and each groove-shaped gap is respectively matched with the position of one limiting hole 111, so that the limiting sheet 130 can simultaneously pass through the limiting hole 111 and the limiting groove 121.

Among them, the photoelectric conversion unit 220 may include a carrier board 221 and a silicon photoelectric circuit 222.

The shape of the position limiting sheet 130 is not limited in the present application, as long as the shape of the position limiting sheet 130 can be matched with the shape of the contacting portion of the position limiting groove 121 and the position limiting hole 111. For example, the limiting plate 130 is a rectangular plate, a trapezoid plate, or a fan-shaped plate.

In a concrete application, shell 100 and its chamber that holds are the cuboid, apron 120 also with hold the chamber the shape assorted cuboid, then spacing piece 130 is the slice cuboid, when spacing piece 130 is the slice cuboid, spacing hole 111 can be the quad slit, the control of tolerance precision when the preparation of spacing hole 111 is spacing hole 111 preparation promptly of being convenient for.

In another embodiment, the housing 100 and the receiving cavity thereof are cylindrical, the cover plate 120 is also cylindrical matching the shape of the receiving cavity, and the limiting piece 130 can be a sheet-shaped fan-shaped annular body.

The cover plate 120 is embedded in the opening of the lower case 110, for example, the cover plate 120 is completely embedded in the opening of the lower case 110 through the receiving cavity, in which case the shell 100 has better integrity and smaller volume. For example, the cover plate 120 may be at least partially inserted into the opening of the lower housing 110 through the receiving cavity, and the whole of the limiting groove 121 may be inserted into the opening of the lower housing 110, that is, as long as the limiting piece 130 is disposed in the limiting hole 111 and the corresponding limiting groove 121, the functional module 200 may be limited from moving along the axial direction of the receiving cavity, and some of the cover plate 120 may not be inserted into the opening of the lower housing 110.

In some optional embodiments, the cover plate 120 includes a plurality of screws 122 and threaded through holes 123 for the screws 122 to pass through, and each of the threaded through holes 123 passes through one of the limiting grooves 121 so that each of the screws 122 locks the limiting plate 130 in the corresponding limiting groove 121.

Thus, the screw 122 stabilizes the position-limiting function of the position-limiting piece 130. It can be understood that, when the screw 122 is screwed through the threaded through-hole 123, the clearance of the stopper groove 121 in the axial direction of the screw 122 is contracted, and the stopper piece 130 disposed in the stopper groove 121 is further clamped; when the screw 122 is removed from the cover plate 120 through the threaded through hole 123, the clearance of the stopper groove 121 in the axial direction of the screw 122 is no longer constricted by the screw 122. The screw 122 passes through the threaded through hole 123, so that the limiting plate 130 is more stably disposed in the limiting hole 111 and the corresponding limiting groove 121.

In one specific application, the screw 122 is a countersunk screw 122, and the threaded through hole 123 is a countersunk through hole at a side of the cover plate 120 away from the lower housing 110, and the countersunk through hole can receive a head of the screw 122. In this case, the volume control of the case 100 is better when the cover plate 120 and the lower case 110 are fixed.

In some optional embodiments, 1 through hole of the position-limiting plate 130 is provided on each position-limiting plate 130, so that each screw 122 sequentially passes through the threaded through hole 123 and the through hole of the position-limiting plate 130.

Thus, the screw 122 passes through the through hole of the stopper 130 at the same time as passing through the screw through hole. As long as the screw 122 does not escape from the through hole of the stopper piece 130, the stopper piece 130 cannot escape from the stopper groove 121. That is, not only can the gap of the limiting groove 121 be reduced through the matching of the screw 122 and the limiting groove 121 to realize the fixation of the limiting sheet 130 in the axial direction of the screw 122; the movement of the limiting sheet 130 in the radial direction of the screw 122 can be limited by the matching of the screw 122 and the through hole of the limiting sheet 130. Even if the stopper 130 in the stopper groove 121 cannot be sufficiently clamped due to a failure such as the screw 122 slipping, the screw 122 will restrict the stopper 130 from being disengaged from the stopper groove 121. In summary, the stability of the fixing of the housing 100 to the functional module 200 is further improved by the setting of the through hole of the stopper 130.

In some alternative embodiments, the outer shell 100 is a rectangular parallelepiped, and 2 limiting holes 111 are respectively disposed on 4 side surfaces of the lower housing 110.

Therefore, the detector module is used in the casing 100 cuboid, and the space utilization rate is high when the detector module is used for array arrangement; when the housing 100 is a rectangular parallelepiped and each side surface of the lower case 110 is provided with 2 limiting holes 111, the lower case 110 and the cover plate 120 are not easily separated and have better stability even if external impact and vibration are applied.

In some optional embodiments, the housing 100 further includes not less than 2 guide pins 140, each guide pin 140 is disposed on an end surface of the cover plate 120 away from the lower case 110, and the guide pins 140 are used to position the detector module on the heat dissipation back plate.

Therefore, when the detector modules are arranged in an array, the cover plate 120 of the shell 100 of the plurality of detector modules can be attached to the heat dissipation back plate, the heat dissipation back plate is provided with positioning holes matched with the positions and shapes of the guide pins 140, and the guide pins 140 are accommodated in the corresponding positioning holes, so that the plurality of detector modules can be accurately positioned on the heat dissipation back plate. On one hand, the positioning function can be provided through the guide pins 140, so that the efficiency of the technical personnel for the array arrangement of the detector modules is higher; on the other hand, when one or more detector modules of the detector break down, technicians can replace the broken-down detector modules more simply, and the technicians can maintain the detector conveniently.

In some alternative embodiments, the cover plate 120 is made of a heat conductive material.

Thus, when the detector module is positioned and mounted on the heat dissipation backplate, the cover plate 120 is reused for the heat dissipation member, and the heat inside the detector is conducted to the outside (heat dissipation backplate). That is, the cover plate 120 is reused, and a heat dissipation member does not need to be separately provided for the housing 100, so that the volume and weight of the housing 100 can be reduced, and the cost and design difficulty of the housing 100 can be reduced.

The heat conducting material can be aluminum alloy and copper alloy, and the copper alloy has lower heat conducting coefficient and better heat conducting (radiating) performance; aluminum alloys also have good thermal conductivity and can reduce the cost of the detector module compared to copper alloys.

In some optional embodiments, the inner wall of the accommodating cavity is made of carbon fiber or black polymer material.

Therefore, the inner wall of the carbon fiber or black polymer material does not reflect light, so that the functional module 200 can be protected from light when the inner wall of the accommodating cavity is made of the carbon fiber or black polymer material. Compare respectively through the means of shading paper or encapsulation to carry out the light-resistant to some or all parts in the functional module 200, through the selection to lower casing 110 inner wall material, with the light-resistant of multiplexing as functional module 200 of lower casing 110, and what realize is whole light-resistant, the effect is better. In summary, the inner wall of the carbon fiber or black polymer material realizes the whole light-shielding of the functional module 200; the lower case 110 performs multiplexing of the light shielding function, which further saves the volume and manufacturing cost of the housing 100.

Examples of the black polymer material include black polymer polyethylene and black polymer polyetherimide.

In one embodiment, carbon fiber or black polymer material may be used for the entire lower case 110.

In another specific application, the carbon fiber or black polymer material is only used for the inner wall of the accommodating cavity of the entire lower housing 110.

In some optional embodiments, the functional module 200 further comprises a flexible light guide 240, the flexible light guide 240 is adhered between the scintillator 210 and the photoelectric conversion unit 220, and the flexible light guide 240 is used for optically coupling the scintillator 210 and the photoelectric conversion unit 220.

Thereby, the conduction of the optical signal between the scintillator 210 and the photoelectric conversion unit 220 may be achieved by the flexible light guide 240. When the scintillator 210 and/or the photoelectric conversion unit 220 are/is vibrated or impacted, the flexible light guide 240 adhered between the scintillator 210 and the photoelectric conversion unit 220 plays a role in cushioning, so that the failure rate of the detector module is reduced, and the stability of the detector module is improved.

In some alternative embodiments, the detector module further comprises a reflective sheet 250, an aerogel layer 260, and a flexible thermal insulating sheet 270, disposed in a sequential stack;

the reflecting sheet 250 is disposed on an end surface of the position encoding unit 230 away from the cover plate 120, and the reflecting sheet 250 is used for reflecting heat radiation generated by the position encoding unit 230;

the air gel layer 260 serves to insulate heat transfer between the reflection sheet 250 and the photoelectric conversion unit 220;

the flexible thermal insulating sheet 270 is disposed between the photoelectric conversion unit 220 and the aerogel layer 260, and the flexible thermal insulating sheet 270 is used to block heat transfer between the photoelectric conversion unit 220 and the aerogel layer 260.

Thus, the reflective sheet 250 may reflect the thermal radiation generated by the position encoding unit 230, and prevent the heat generated by the position encoding unit 230 from being transferred to the photoelectric conversion unit 220 and the scintillator 210 in the form of thermal radiation; the aerogel layer 260 is a composite product made of glass and plastic, and has low thermal conductivity, so that heat transfer between the position encoding unit 230 and the photoelectric conversion unit 220 can be avoided; the flexible heat insulating sheet 270 is a heat insulating sheet made of a flexible material, and on the one hand, functions to insulate heat between the position encoding unit 230 and the photoelectric conversion unit 220, and on the other hand, is provided between the photoelectric conversion unit 220 and the aerogel layer 260, and functions as a flexible cushion.

The connector of the photoelectric conversion unit 220 and the connector of the position encoding unit 230 realize the transmission of the electric signal therebetween, so that a certain gap is formed between the photoelectric conversion unit 220 and the position encoding unit 230, and the gap can be filled by the stacked reflection sheet 250, the air gel layer 260 and the flexible heat insulation sheet 270, and the heat radiation and the heat transfer between the position encoding unit 230 and the photoelectric conversion unit 220 are isolated, so that the utilization ratio of the space of the housing 100 is high.

In summary, the stacked reflector sheet 250, the aerogel layer 260, and the flexible thermal insulation sheet 270 improve the space utilization of the detector module, and avoid thermal crosstalk between the scintillator 210, the photoelectric conversion unit 220, and the position encoding unit 230.

In one embodiment, the reflector plate 250 is made of high purity tungsten, so that the reflector plate 250 can block and attenuate gamma rays, thereby protecting the electronic components of the position encoding unit 230 and reducing the pollution of the whole radioactive rays to the surrounding environment. The side of the reflection sheet 250 adjacent to the position encoding unit 230 may be a high-finish metal surface, or may be a reflection surface made of aluminum foil, so as to isolate heat radiation (infrared radiation).

Example two

The application also discloses a housing 100 of the detector module, and the structure and the function of the housing 100 in the embodiment are the same as those of the housing 100 in the first embodiment, and the function thereof is not repeated.

The housing 100 includes: a lower case 110, a cover plate 120, and a plurality of stopper pieces 130;

the lower housing 110 is provided with an accommodating cavity, the top of the accommodating cavity is provided with an opening, and the accommodating cavity is used for accommodating the functional module 200 and limiting the moving distance of the functional module 200 along the radial direction of the accommodating cavity; a plurality of limiting holes 111 for the limiting sheet 130 to pass through are formed in the side wall of the accommodating cavity;

the cover plate 120 is embedded in the opening of the lower housing 110, and a limit groove 121 corresponding to the limit hole 111 is formed in a side edge of the cover plate 120;

each of the limiting pieces 130 is disposed in one of the limiting holes 111 and the corresponding limiting groove 121, and is configured to limit a moving distance of the functional module 200 along the axial direction of the accommodating cavity.

In some optional embodiments, the cover plate 120 includes a plurality of screws 122 and threaded through holes 123 for the screws 122 to pass through, and each of the threaded through holes 123 passes through one of the limiting grooves 121 so that each of the screws 122 locks the limiting plate 130 in the corresponding limiting groove 121.

In some optional embodiments, 1 through hole of the position-limiting plate 130 is provided on each position-limiting plate 130, so that each screw 122 sequentially passes through the threaded through hole 123 and the through hole of the position-limiting plate 130.

In some alternative embodiments, the outer shell 100 is a rectangular parallelepiped, and 2 limiting holes 111 are respectively disposed on 4 side surfaces of the lower housing 110.

In some optional embodiments, the housing 100 further includes not less than 2 guide pins 140, each guide pin 140 is disposed on an end surface of the cover plate 120 away from the lower case 110, and the guide pins 140 are used to position the detector module on the heat dissipation back plate.

In some alternative embodiments, the cover plate 120 is made of a heat conductive material.

In some optional embodiments, the inner wall of the accommodating cavity is made of carbon fiber or black polymer material.

EXAMPLE III

The application also discloses a detector array, includes:

the detector module of any of the second embodiments, the housing 100 of each detector module comprising no less than 2 guide pins 140;

a heat-dissipating back plate provided with a plurality of positioning holes for receiving the guide pins 140 of each detector module and positioning each detector module;

wherein a plurality of the detector modules are arranged in an array or matrix.

Therefore, the detector modules in the detector array are arranged more closely, and the sensitivity of the detector is improved.

The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "corresponding" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of embodiments of the invention and should not be construed as limiting the invention.

While the present application is described in terms of various aspects, including exemplary embodiments, the principles of the invention should not be limited to the disclosed embodiments, but are also intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. A housing for a detector module, the housing comprising: the lower shell, the cover plate and the plurality of limiting pieces;

the lower shell is provided with an accommodating cavity, the top of the accommodating cavity is provided with an opening, and the accommodating cavity is used for accommodating a functional module and limiting the moving distance of the functional module along the radial direction of the accommodating cavity; a plurality of limiting holes for the limiting sheets to pass through are formed in the side wall of the accommodating cavity;

the cover plate is embedded in the opening of the lower shell, and a limit groove corresponding to the limit hole is formed in the side edge of the cover plate;

each limiting piece is arranged in one limiting hole and the corresponding limiting groove and used for limiting the moving distance of the functional module along the axial direction of the accommodating cavity.

2. The housing of claim 1, wherein the cover plate comprises a plurality of screws and threaded through holes for the screws to pass through, each threaded through hole passing through one of the limiting grooves so that each screw locks the limiting piece in the corresponding limiting groove.

3. The housing of claim 2, wherein each of the position-limiting pieces is provided with 1 position-limiting piece through hole, so that each of the screws sequentially passes through the threaded through hole and the position-limiting piece through hole.

4. The shell according to claim 2, wherein the shell is a rectangular parallelepiped, and 2 limiting holes are respectively provided on 4 side surfaces of the lower case.

5. The shell according to claim 1, further comprising not less than 2 guide pins, each guide pin being respectively disposed on an end surface of the cover plate away from the lower shell, the guide pins being used for positioning the detector module on the heat dissipation back plate.

6. The housing of claim 1, wherein the cover plate is made of a thermally conductive material.

7. The shell according to claim 1, wherein the inner wall of the accommodating cavity is made of carbon fiber or black polymer material.

8. A detector module, characterized in that the detector module comprises:

the housing of any one of claims 1-7, comprising: the lower shell, the cover plate and the plurality of limiting pieces; the lower shell is provided with an accommodating cavity;

the functional module, functional module is including scintillator, photoelectric conversion unit and the position coding unit that stacks gradually the setting, functional module set up in the intracavity that holds of casing down, just the scintillator set up in hold at the bottom of the chamber in chamber.

9. The detector module of claim 8, further comprising a flexible light guide adhered between the scintillator and the photoelectric conversion unit, the flexible light guide for optically coupling the scintillator and the photoelectric conversion unit.

10. The detector module of claim 8, further comprising a reflective sheet, an air gel layer, and a flexible thermal insulating sheet, in a stacked arrangement;

the reflector plate is arranged on the end face, far away from the cover plate, of the position coding unit and used for reflecting heat radiation generated by the position coding unit;

the air-gel layer is used for insulating heat transfer between the reflection sheet and the photoelectric conversion unit;

the flexible heat insulation sheet is arranged between the photoelectric conversion unit and the aerogel layer and used for isolating heat transfer between the photoelectric conversion unit and the aerogel layer.

11. A detector array, comprising:

a plurality of the detector modules of any of claims 8-10, the housing of each detector module comprising no less than 2 guide pins;

the heat dissipation back plate is provided with a plurality of positioning holes, and the positioning holes are used for accommodating the guide pins of each detector module and positioning each detector module;

wherein a plurality of the detector modules are arranged in an array or matrix.

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