CN109922647B - Electromagnetic shielding protective housing, detection subassembly and detector - Google Patents
Electromagnetic shielding protective housing, detection subassembly and detector Download PDFInfo
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- CN109922647B CN109922647B CN201910238173.XA CN201910238173A CN109922647B CN 109922647 B CN109922647 B CN 109922647B CN 201910238173 A CN201910238173 A CN 201910238173A CN 109922647 B CN109922647 B CN 109922647B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 239000013078 crystal Substances 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 18
- 238000002600 positron emission tomography Methods 0.000 description 16
- 238000002595 magnetic resonance imaging Methods 0.000 description 15
- 230000002829 reductive effect Effects 0.000 description 10
- 238000003384 imaging method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000002059 diagnostic imaging Methods 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229940121896 radiopharmaceutical Drugs 0.000 description 1
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Abstract
The embodiment of the invention discloses an electromagnetic shielding protective shell, a detection assembly and a detector. Wherein, electromagnetic shield protective housing includes: the supporting unit is provided with a first opening, and the first opening is an inlet for the shielded unit to enter the first accommodating space of the supporting unit; the closed unit is provided with a second opening, the second opening is an inlet for the supporting unit to enter a second accommodating space of the closed unit, and the second opening and the first opening are staggered; the support unit is connected with the closed unit in a pulling manner, and the area of the closed unit covering the first opening is changed along with the movement of the closed unit relative to the support unit along the pulling direction. The technical scheme provided by the embodiment of the invention can improve the electromagnetic shielding performance, and ensure that the electronic equipment is not interfered with other equipment and is not influenced by the other equipment.
Description
Technical Field
The invention relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding protective shell, a detection assembly and a detector.
Background
Electromagnetic waves are the primary means of electromagnetic energy propagation. When the high-frequency circuit works, electromagnetic waves are radiated outwards, and interference is generated on other adjacent electronic equipment. Various electromagnetic waves in space can be induced into the circuit, and the circuit is interfered. For example, a PET/MR all-in-one machine is an instrument that organically combines a positron emission tomography system and a magnetic resonance imaging system within the same gantry, which enables spatially and temporally accurate registration and fusion of different imaging modalities. The application of the imaging technology realizes molecular functional imaging and fine anatomy synchronous acquisition, can provide multi-mode molecular image information, and has important value in clinical application and scientific research fields. However, in PET/MR systems, electromagnetic compatibility of PET and MR is one of the most important difficulties of the whole system, and the detector of a positron emission tomography system is easily affected by electromagnetic signals of the magnetic resonance imaging system, so that the imaging quality of the positron emission tomography system is reduced. Therefore, electromagnetic shielding protection measures are required to cut off the propagation path of electromagnetic waves, so that electromagnetic interference is eliminated, and the electronic equipment is not interfered with other equipment and is not influenced by the other equipment.
Disclosure of Invention
The embodiment of the invention provides an electromagnetic shielding protective shell, a detection assembly and a detector, which are used for improving electromagnetic shielding performance and ensuring that electronic equipment is not interfered with other equipment and is not influenced by the other equipment.
In a first aspect, an embodiment of the present invention provides an electromagnetic shielding protective case, including:
the supporting unit is provided with a first opening, and the first opening is an inlet for the shielded unit to enter the first accommodating space of the supporting unit;
the closed unit is provided with a second opening, the second opening is an inlet for the supporting unit to enter a second accommodating space of the closed unit, and the second opening and the first opening are staggered;
the support unit is connected with the closed unit in a pulling manner, and the area of the closed unit covering the first opening is changed along with the movement of the closed unit relative to the support unit along the pulling direction.
Further, the closing unit includes a closing portion having an area covering the first opening that changes with a movement of the closing unit relative to the supporting unit in a drawing direction, and a drawing connection portion covering opposite sides of the supporting unit from the first opening, and a side of the supporting unit opposite to the first opening.
Further, the supporting unit and the closing unit have a rectangular parallelepiped shape.
Further, the material of the support unit and the closing unit comprises at least one of the following: copper and carbon fiber.
Further, an edge region of the closing unit close to the second opening, and an edge region of a portion of the supporting unit for covering the second opening are provided with a soft magnetic material.
In a second aspect, an embodiment of the present invention further provides a detection assembly, including: the detection unit and the electromagnetic shielding protective shell provided by any embodiment of the invention are shielded units.
Further, the detection unit comprises a crystal structure and two positioning end blocks, wherein the two positioning end blocks are arranged at two ends of the crystal structure.
Further, the detection unit further comprises a cooling layer and two printed circuit boards, the crystal structure is electrically connected with the printed circuit boards, and the crystal structure, the printed circuit boards and the cooling layer are arranged in a layer-by-layer manner;
the cooling layer is positioned between the two printed circuit boards, and the crystal structure is positioned on one side of the printed circuit board away from the cooling layer;
the printed circuit board is used for receiving and processing photon signals detected by the crystal structure;
the supporting unit and/or the sealing unit are/is provided with an opening, and the pipelines arranged at the inlet and the outlet of the cooling layer pass through the opening and are respectively communicated with the outlet and the inlet of the circulating power device.
In a third aspect, embodiments of the present invention further provide a detector, including a plurality of detection assemblies provided in any of the embodiments of the present invention.
Further, the device also comprises an annular bracket, wherein a plurality of detection assemblies are arranged on the annular bracket, and the detection assemblies are sequentially arranged along the circumferential direction of the annular bracket.
According to the technical scheme, the supporting unit and the closing unit are connected in a pulling mode, the second opening and the first opening are staggered, the area of the closing unit covering the first opening is changed along with the movement of the closing unit relative to the supporting unit along the pulling direction, the closing space of the electromagnetic shielding formed by assembling the supporting unit and the closing unit is tightly attached to the joint, the overlapping area of the joint is large, the generated gap is small, electromagnetic leakage can be reduced, the electromagnetic shielding efficiency is improved, the problem that when the upper and lower opposite part housings are connected through screws to form the electromagnetic shielding protective shell, long linear gaps are generated at the positions where the upper and lower part housings are in relative contact, electromagnetic leakage is caused, and shielding efficiency is affected is solved, and the electromagnetic shielding protective shell of the pulling type structure is convenient to assemble.
Drawings
Fig. 1 is an exploded view of an electromagnetic shielding protective case according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electromagnetic shielding protective shell in a drawing process according to an embodiment of the present invention;
fig. 3 is a top view of an electromagnetic shielding protective case according to an embodiment of the present invention along the BB' direction in fig. 2;
fig. 4 is a schematic structural diagram of an electromagnetic shielding protective shell in a completely closed state according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another electromagnetic shielding protective case according to an embodiment of the present invention;
fig. 6 is an exploded view of yet another electromagnetic shielding protective case according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a detection unit placed in a supporting unit according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a detection assembly according to an embodiment of the present invention;
FIG. 9 is an exploded view of a probe assembly according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of yet another electromagnetic shielding protective case according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a detector according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of yet another detector according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The embodiment of the invention provides an electromagnetic shielding protective shell. Fig. 1 is an exploded view of an electromagnetic shielding protective case according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of an electromagnetic shielding protective shell in a drawing process according to an embodiment of the present invention. Fig. 3 is a top view of an electromagnetic shielding protective case according to an embodiment of the present invention along the BB' direction in fig. 2. Fig. 4 is a schematic structural diagram of an electromagnetic shielding protective housing in a completely closed state according to an embodiment of the present invention. As shown in connection with fig. 1 to 4, the electromagnetic shield protective case includes: a support unit 110 and a closing unit 120.
The supporting unit 110 is provided with a first opening 111, and the first opening 111 is an entrance of the shielded unit into a first accommodating space 112 of the supporting unit 110; the closing unit 120 is provided with a second opening 121, the second opening 121 is an inlet of the supporting unit 110 into a second accommodating space 122 of the closing unit 120, and the second opening 121 is staggered with the first opening 111; the supporting unit 110 is connected to the closing unit 120 in a pulling manner, and the area of the closing unit 120 covering the first opening 111 changes along with the movement of the closing unit 120 along the pulling direction AA' relative to the supporting unit 110.
The shielded unit may be any electronic device that needs to be provided with electromagnetic shielding protection, for example, a detection unit for positron emission tomography (Positron Emission Computed Tomography, PET), and the electromagnetic shielding protection shell may shield radio frequency signals emitted by a magnetic resonance imaging system (Magnetic Resonance Imaging, MRI) to protect signal integrity of internal circuits of a detector in the positron emission tomography system. The shielded unit may also be an electronic component in a magnetic resonance imaging system. The material of the supporting unit 110 may include at least one of: aluminum, copper, and carbon fibers. The material of the closed cell 120 may include at least one of: aluminum, copper, and carbon fibers. The support unit 110 and the closing unit 120 may be detachably connected or non-detachably connected. Optionally, the second opening 121 is smaller than the first opening 111. When the closing unit 120 is pulled along the pulling direction AA' to completely cover the first opening 111, the second opening 121 and the first opening 111 are staggered, and no overlapping area exists. Alternatively, the supporting unit 110 and the closing unit 120 may be connected in a drawing manner by a drawing connection structure. The drawing connection structure may be disposed at opposite sides of the support unit at the first opening. Alternatively, the closed cells 120 may be rectangular or cylindrical, and the closed cells 120 may also be square. The support unit 110 is the same or similar in shape to the closing unit 120. The shapes of the supporting unit 110 and the closing unit 120, and the shapes and positions of the first opening 111 and the second opening 121 may be set as needed, which is not limited in the embodiment of the present invention.
The closed unit 120 is pulled along the pulling direction AA 'to a position where the first opening 111 is not covered by the closed unit 120, the shielded unit can be placed in the first accommodating space 112 of the supporting unit 110 through the first opening 111, and then the closed unit 120 is pulled along the pulling direction AA' to a position where the closed unit 120 completely covers the first opening 111, at this time, the supporting unit 110 completely covers the second opening 121, and the supporting unit 110 and the closed unit 120 can form a completely closed space to surround the shielded unit, so that electromagnetic signals generated by the shielded unit do not interfere with other external devices or are not affected by electromagnetic signals of other devices.
Fig. 5 is a schematic structural diagram of another electromagnetic shielding protective case according to an embodiment of the invention. As shown in fig. 5, the electromagnetic shielding protective housing connects the upper and lower covers 170 with each other by screws, so that a long linear gap is generated at the position where the upper and lower covers 170 are in contact with each other, and the joint cannot be tightly attached, thereby causing electromagnetic leakage and affecting the shielding efficiency.
In fig. 4, the supporting unit 110 and the closing unit 120 are connected in a pulling manner, the second opening 121 and the first opening 111 are staggered, the closing unit 120 is used for covering the first opening 111, the electromagnetic shielding closing space formed by assembling the supporting unit and the closing unit is tightly attached to the joint, the overlapping area of the joint is large, the generated gap is small, electromagnetic leakage can be reduced, the electromagnetic shielding efficiency is improved, the problem that when the upper and lower opposite housings are connected through screws in fig. 5, long linear gaps are generated at the positions where the upper and lower housings are in opposite contact, electromagnetic leakage is caused, shielding efficiency is affected is solved, screws and the like are not needed, and the assembly is convenient. The electromagnetic shielding protective housing is a fully-enclosed shielding housing, and the installation mode of drawing motion is used, and the electromagnetic shielding protective housing is similar to the drawing mode of a drawer or a matchbox, so that the electromagnetic wave effect of long-seam leakage generated by a shielding structure formed by similar upper and lower housings can be avoided.
According to the technical scheme, the supporting unit and the sealing unit are connected in the pulling mode, the second opening and the first opening are staggered, the area of the sealing unit covering the first opening is changed along with the movement of the sealing unit along the pulling direction relative to the supporting unit, the sealing space of the electromagnetic shielding formed by assembling the supporting unit and the sealing unit is tightly attached to the joint, the overlapping area of the joint is large, the generated gap is small, electromagnetic leakage can be reduced, the electromagnetic shielding efficiency is improved, the problem that when the upper part of casing and the lower part of casing which are opposite are connected through screws to form the electromagnetic shielding protection shell, long linear gaps are generated at the positions where the upper part of casing and the lower part of casing are in relative contact, electromagnetic leakage is caused, the shielding efficiency is influenced, and the electromagnetic shielding protection shell of the pulling type structure is convenient to assemble.
Optionally, the materials of the supporting unit and the sealing unit are carbon fibers, the conductivity of the carbon fibers is anisotropic, a loop is difficult to form inside, the supporting unit and the sealing unit have the characteristic of high-frequency pass low frequency resistance, and compared with a metal material, the eddy current generated is reduced.
The embodiment of the invention provides a protective electromagnetic shielding shell. On the basis of the above-described embodiment, with continued reference to fig. 1 to 4, the closing unit 120 includes a closing portion covering the first opening 111, an area of which varies with a movement of the closing unit 120 relative to the supporting unit 110 in the drawing direction AA', and a drawing connection portion covering both sides of the supporting unit 110 opposite to the first opening 111, and a side of the supporting unit 110 opposite to the first opening 111.
Wherein the drawing connection portion covers at least a partial region of each of the opposite sides of the support unit 110 from the first opening 111, and at least a partial region of the opposite side of the support unit 110 from the first opening 111. As shown in connection with fig. 1-4, the closure portion of the closure unit 120 includes a first portion 1201 and the pull connection portion includes a second portion 1202, a third portion 1203, a fourth portion 1204, and a fifth portion 1205. The second portion 1202 and the third portion 1203 cover opposite sides of the support unit 110 from the first opening 111. The fourth portion 1204 and the fifth portion 1205 cover a side of the supporting unit 110 opposite to the first opening 111. Wherein, pull connecting portion is equivalent to pull connection structure, and pull connection structure and closing unit 120 are integrated into one piece structure promptly, simple structure need not to set up complicated pull connection structure between supporting element and closing unit, and pull connecting portion covers on supporting element for coverage area increases, reduces the magnetic leakage, improves electromagnetic shielding effect.
The embodiment of the invention provides a protective electromagnetic shielding shell. Fig. 6 is a schematic structural diagram of another electromagnetic shielding protective case according to an embodiment of the present invention, where the supporting unit 110 and the sealing unit 120 have a rectangular parallelepiped shape.
Wherein the supporting unit 110 includes five faces and the closing unit 120 includes four faces. The four faces of the closing unit 120 are used to cover the first opening, cover the surfaces located at opposite sides of the first opening 111, and cover the surface of the support unit 110 at the opposite side of the first opening 111, respectively. At this time, the supporting unit 110 and the closing unit 120 have only two joints, which are located at opposite sides of the first opening.
Alternatively, on the basis of the above embodiment, the supporting unit 110 and the closing unit 120 have a rectangular parallelepiped shape, the supporting unit 110 includes five faces, and the closing unit 120 includes five faces, so that the seam between the supporting unit 110 and the closing unit 120 is further reduced, and only one seam is located at one side of the first opening.
Optionally, the edge area 123 of the closing unit 120 adjacent to the second opening 121, and the edge area 113 of the portion of the supporting unit 110 for covering the second opening 121 are provided with soft magnetic material, the edge area 123 and the edge area 113 being partially opposite or coincident when the supporting unit and the closing unit are pulled to a fully closed state. The soft magnetic material may be permalloy. By providing soft magnetic material at the joint, the sealing properties against electromagnetic waves can be increased.
The embodiment of the invention provides a detection assembly for positron emission tomography. Fig. 7 is a schematic structural diagram of a detection unit placed in a supporting unit according to an embodiment of the present invention. Fig. 8 is a schematic structural diagram of a detection assembly according to an embodiment of the present invention. Fig. 9 is a schematic structural diagram of a detection assembly according to an embodiment of the present invention. The detection assembly may be disposed in a positron emission tomography system, and the positron emission tomography system and the magnetic resonance imaging system may be disposed in a medical imaging apparatus. As shown in connection with fig. 7 and 8, the detection assembly includes: the detection unit 200 and the electromagnetic shielding protective housing provided by any embodiment of the present invention, the detection unit 200 is a shielded unit.
Wherein the detection unit 200 may be used to detect photons having an energy of 511KeV generated by the subject after being injected with the radiopharmaceutical. The magnetic resonance imaging system may include a main magnet, gradient coils, radio frequency receive coils, radio frequency transmit coils, and the like.
The detection unit for positron emission tomography is arranged in the first accommodating space of the electromagnetic shielding protective shell of the pull-out structure, so that the influence of electromagnetic signals of the magnetic resonance imaging system on the detector of the positron emission tomography system is reduced, the electromagnetic shielding performance of the positron emission tomography system can be improved, and the imaging quality of the positron emission tomography system is improved.
According to the technical scheme, the supporting unit and the sealing unit are connected in the drawing mode, the second opening and the first opening are staggered, the area of the sealing unit covering the first opening is changed along with the movement of the sealing unit along the drawing direction relative to the supporting unit, the sealing space of the electromagnetic shielding formed by assembling the supporting unit and the sealing unit is tightly attached to the joint, the overlapping area of the joint is large, the generated gap is small, electromagnetic leakage can be reduced, the electromagnetic shielding efficiency is improved, the problem that when the upper and lower opposite housings are connected through screws in a positron emission tomography system, long linear gaps are generated at the positions where the upper and lower housings are in relative contact, electromagnetic leakage is caused, shielding efficiency is affected is solved, the electromagnetic shielding performance of the positron emission tomography system is improved, the imaging quality of the positron emission tomography system is improved, and the assembly is convenient.
The detection assembly provided by the embodiment of the invention comprises the electromagnetic shielding protective shell in the embodiment, so that the detection assembly provided by the embodiment of the invention also has the beneficial effects described in the embodiment, and the description is omitted here.
Alternatively, with continued reference to fig. 7 and 8, the detection unit 200 includes a crystal structure 210 and two positioning end blocks 220, with the two positioning end blocks 220 disposed at opposite ends of the crystal structure 210.
Wherein the crystal structure 210 may include: a pixelated scintillator and a photodiode array. The positioning end block 220 is fixed to the supporting unit 110 by a positioning pin and a screw. Two positioning end blocks 220 are used to fix the crystal structure 210 to accurately fix the spatial position of the crystal structure. The positioning end block arranged in the electromagnetic shielding protective shell can be made of non-metal materials. The crystal structure 210, the positioning end block 220 and the like are arranged in the electromagnetic shielding protective shell, the electromagnetic shielding protective shell has a positioning supporting function and electromagnetic wave shielding functions at two ends, gaps generated by mechanical connection can be reduced, the detection unit is interfered by external electromagnetic waves, and meanwhile, the debugging cost of the detector before leaving a factory is reduced.
The positioning end block 220 is arranged in the electromagnetic shielding protective shell, so that the problems that when the electromagnetic shielding protective shell in fig. 5 is adopted, a crystal structure is placed in an accommodating space defined by the upper part of housing 170 and the lower part of housing 170 relatively, two ends of the crystal structure are fixed through the positioning end block, the positioning end block is fixed on a bracket through positioning pins, the positioning end block is a copper block and is positioned at two ends of the upper part of housing 170 and the lower part of housing 170 so as to shield two ends of the upper part of housing 170 and play a role of electromagnetic shielding, the positioning end block is a very thick copper block, eddy current is generated in the magnetic resonance imaging process, the eddy current duration of the positioning end block is far longer than that of the upper part of housing 170 and the lower part of housing 170, the phase of signals can be influenced in the magnetic resonance imaging process, the eddy current of the upper part of housing 170 is attenuated very fast, accumulation can not be generated in the next scanning period, the attenuation of the positioning end block is very slow, the phase accumulation can not be generated in the current scanning period, the image quality can be influenced in different scanning periods of the magnetic resonance process, and the vibration of the upper part of housing 170 and the lower part of housing 170 can vibrate at the same time.
Optionally, the materials of the supporting unit and the sealing unit are carbon fibers, the conductivity of the carbon fibers is anisotropic, a loop is difficult to form inside, the electromagnetic shielding protective shell has the characteristic of high-frequency pass low frequency resistance, and compared with a metal material, serious vortex can be prevented from being generated under the action of a gradient magnetic field of the magnetic resonance imaging system, so that artifacts are generated in the imaging process of the magnetic resonance imaging system. The whole detector has no large area or large metal, has good electromagnetic compatibility with a magnetic resonance imaging system, generates smaller vortex under the precondition of ensuring shielding performance, causes the generated vortex to be attenuated in the current scanning period, cannot generate accumulation in the next scanning period, and solves the problem of influence of the vortex on the magnetic field of the gradient coil.
Embodiments of the present invention provide yet another detection assembly. Fig. 9 is an exploded view of a probe assembly according to an embodiment of the present invention. Fig. 10 is a schematic structural diagram of another electromagnetic shielding protective case according to an embodiment of the present invention. On the basis of the above-described embodiment, as shown in fig. 7 to 10, the probe unit 200 further includes a cooling layer 230 and two printed circuit boards 240, the crystal structure 210 is electrically connected to the printed circuit boards 240, and the crystal structure 210, the printed circuit boards 240, and the cooling layer 230 are stacked; the cooling layer 230 is located between two printed circuit boards 240, and the crystal structure 210 is located on a side of the printed circuit boards 240 away from the cooling layer 230; the printed circuit board 240 is used to receive and process the photon signals detected by the crystal structure 210; the support unit 110 and/or the closing unit 120 is provided with an opening 150, and the inlet and outlet of the cooling layer 230 are provided with pipes 233 which pass through the opening 150 to communicate with the outlet and inlet of a circulation power unit (not shown in the drawings), respectively.
Optionally, as shown in fig. 7, the depth H of the opening 150 is greater than or equal to 1 cm and less than or equal to 10 cm. The opening 150 corresponds to a waveguide, and causes leakage of electromagnetic waves, and the greater the depth of the opening 150, the more likely electromagnetic waves are attenuated. The depth of the opening is set according to the cut-off characteristics of the waveguide. As shown in fig. 7 and 10, a portion of any opening 150 is disposed on the supporting unit 110, referring to fig. 7, and another portion of any opening 150 is disposed on the closing unit 120, which is not shown in the drawing, similar to fig. 7, when the electromagnetic shielding protective case is in a completely closed state, as shown in fig. 10, the opening 150 is disposed on a portion of the supporting unit 110 opposite to another portion disposed on the closing unit 120, so that it is convenient to load the cooling layer connected with the pipe into the supporting unit, and bending of the pipe during assembly is avoided. The circulation power device provides power for the circulation flow of coolant between the cooling layer and the circulation power device. The coolant may be water or gas, etc.
The embodiment of the invention provides a detector. Fig. 11 is a schematic structural diagram of a detector according to an embodiment of the present invention. The detector may be disposed in a medical imaging device that includes a positron emission tomography system and a magnetic resonance imaging system. The detector 1 comprises a plurality of detection assemblies 10 provided in any of the embodiments of the present invention.
Wherein fig. 11 illustrates a case where 2 probe assemblies 10 are disposed opposite to each other. The 2 detection modules 10 are located on both sides of the examinee. The number of the detecting components can be set according to the requirement, and the embodiment of the invention is not limited to this. The detector provided by the embodiment of the present invention includes the detection component in the above embodiment, so the detector provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and will not be described herein.
Optionally, fig. 12 is a schematic structural diagram of still another probe according to an embodiment of the present invention, where the probe further includes an annular bracket 20, and a plurality of probe assemblies 10 are disposed on the annular bracket, and the plurality of probe assemblies 10 are sequentially arranged along a circumferential direction of the annular bracket 20. When the examinee is examined, the examinee is located inside the ring-shaped support 20. The both ends of electromagnetic shield protective housing are provided with screw hole or through-hole, and the both ends accessible screw and locating pin of electromagnetic shield protective housing are locked and are fixed on the annular support.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. An electromagnetic shielding protective case for reducing the effect of an electromagnetic signal of an MRI system on a detector of a PET system, comprising:
the support unit is provided with a first opening, the first opening is an inlet for a shielded unit to enter a first accommodating space of the support unit, and the shielded unit is a PET detection unit;
the closed unit is provided with a second opening, the second opening is an inlet for the supporting unit to enter a second accommodating space of the closed unit, and the second opening and the first opening are staggered;
the support unit is connected with the closed unit in a drawing way, and the area of the closed unit covering the first opening is changed along with the movement of the closed unit relative to the support unit along the drawing direction; the closing unit comprises a closing part and a drawing connection part;
the drawing connection part and the closed unit are of an integrated structure;
the supporting unit and the closing unit are assembled to form an electromagnetic shielding closed space, and the detecting unit is accommodated in the closed space.
2. The electromagnetic shield protective case according to claim 1, wherein an area of the closing portion covering the first opening changes with a movement of the closing unit in a drawing direction with respect to the supporting unit, the drawing connection portion covering both sides of the supporting unit opposite to the first opening, and a side of the supporting unit opposite to the first opening.
3. The electromagnetic shield protective housing of claim 1, wherein the support unit and the enclosure unit are rectangular parallelepiped shaped.
4. The protective electromagnetic shielding case of claim 1, wherein the material of the support unit and the enclosure unit comprises at least one of: copper and carbon fiber.
5. The electromagnetic shield protective case according to claim 1, wherein an edge region of the closing unit near the second opening, and an edge region of a portion of the supporting unit for covering the second opening are provided with a soft magnetic material.
6. A probe assembly, comprising: a detection unit and an electromagnetic shielding protective housing according to any one of claims 1-5, said detection unit being a shielded unit.
7. The detection assembly of claim 6, wherein the detection unit comprises a crystal structure and two positioning end blocks disposed at both ends of the crystal structure.
8. The probe assembly of claim 7, wherein the probe unit further comprises a cooling layer and two printed circuit boards, the crystal structure being electrically connected to the printed circuit boards, the crystal structure, the printed circuit boards, and the cooling layer being arranged in layers;
the cooling layer is positioned between the two printed circuit boards, and the crystal structure is positioned on one side of the printed circuit board away from the cooling layer;
the printed circuit board is used for receiving and processing photon signals detected by the crystal structure;
the supporting unit and/or the sealing unit is/are provided with an opening, and the pipelines arranged at the inlet and the outlet of the cooling layer pass through the opening and are respectively communicated with the outlet and the inlet of the circulating power device.
9. A detector comprising a plurality of detection assemblies as claimed in any one of claims 6 to 8.
10. The sonde of claim 9 further comprising an annular support, wherein the plurality of sonde assemblies are disposed on the annular support, the plurality of sonde assemblies being sequentially aligned along a circumferential direction of the annular support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238173.XA CN109922647B (en) | 2019-03-27 | 2019-03-27 | Electromagnetic shielding protective housing, detection subassembly and detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238173.XA CN109922647B (en) | 2019-03-27 | 2019-03-27 | Electromagnetic shielding protective housing, detection subassembly and detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109922647A CN109922647A (en) | 2019-06-21 |
| CN109922647B true CN109922647B (en) | 2024-04-02 |
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