A hanging device for PET crystal unit

Abstract

The present invention discloses a hanging device for a PET crystal unit, comprising a circuit adapter board and a front-end connecting board. The circuit adapter board is communicatively connected with the crystal unit and a PET detector main board respectively, so as to forward the data collected by the crystal unit to the PET detector main board for processing; the front-end connecting board is arranged between the circuit adapter board and the detector main board, the two ends of the front-end connecting board are respectively fixedly connected with the two shell side plates of the detector shell, and the front-end connecting board is provided with a slot, the detector main board is mounted on the front-end connecting board, the detector main board is communicatively connected with the circuit adapter board through the slot, and a plurality of mounting points are arranged on the front and rear side walls of the front-end connecting board for fixed connection with the detector shell. The hanging device shown in the present invention can effectively realize the connection of the entire crystal unit, and the overall structure is stable and easy to disassemble and assemble.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a structure of a PET device, and in particular to a PET crystal light-shielding structure. Background Art

[0002] PET is the abbreviation of Positron Emission Computed Tomography. Radioactive nuclides labeled with positron-carrying compounds are injected into the subject's body, and the subject is scanned within the effective field of view of PET. The positrons emitted by the radioactive nuclides combine with the negative electrons in the tissue to produce annihilation radiation, generating two gamma photons with equal energy (511Kev) and opposite directions. The two photons are detected by two detectors and judged as a coincidence event. The detection system detects a large number of coincidence events, and after classifying the data, the event quantity in different coincidence line directions is obtained. Through electronic computer processing, the distribution of positron nuclides in the human body is reconstructed.

[0003] Most of the current PET crystal detection devices are single crystal structures, which have the disadvantage of small signal coverage, resulting in only late-stage cancer cells being detected during cancer cell detection, and early-stage cancer cells being unable to be detected. Multiple crystals constitute a component, which increases the signal coverage area of ​​the detection, so early-stage cancer cells can be detected. At this stage, the detection of multiple crystals is still a technical blind spot. Therefore, there is an urgent need for a structurally optimized PET crystal detection device to achieve the connection between the detection head pendant and the crystal photoelectric detection unit and other structures. In addition, since the crystal is a photosensitive element, if external light enters during use, on the one hand, it will cause the amount of collected data to be too large (especially irrelevant data), resulting in excessive pressure on image processing such as later compliance processing. Therefore, the device also needs to solve the problem of preventing external light from irradiating the crystal. Summary of the invention

[0004] The invention discloses a PET crystal unit hanging device, which is used for hanging a PET detector module.

[0005] To achieve the above object, the solution of the present invention is:

[0006] A PET crystal unit mounting device, used for mounting the crystal unit of a PET detector module, comprises a circuit adapter board and a front-end connection board; the circuit adapter board is arranged between the crystal unit and the front-end connection board, and is respectively connected to the crystal unit and the PET detector mainboard in communication, so as to forward the data collected by the crystal unit to the PET detector mainboard for processing;

[0007] The front end connecting plate is arranged between the circuit adapter plate and the detector main board, and the two ends of the front end connecting plate are respectively fixedly connected to the two shell side plates of the detector housing, and the front end connecting plate is provided with a slot, and the detector main board is mounted on the front end connecting plate. The detector main board is communicatively connected with the circuit adapter board through the slot, and multiple mounting points are arranged on the front and rear side walls of the front end connecting plate to be fixedly connected with the detector housing.

[0008] Preferably, the detector housing is bolted to the front end connecting plate, a plurality of first-class connecting holes are arranged on the upper parts of the front and rear side walls of the front end connecting plate, a plurality of first-class openings are arranged on the front and rear side plates of the detector housing corresponding to the plurality of first-class connecting holes, a plurality of fourth-class connecting holes are arranged on the left and right side walls of the front end connecting plate, a plurality of fourth-class openings are arranged on the left and right shell side plates of the detector shell correspondingly, and the detector housing and the front end connecting plate are fixedly connected by bolts passing through the first-class connecting holes and the first-class openings, and through the fourth-class connecting holes and the fourth-class openings.

[0009] Preferably, the front connecting plate is also provided with a positioning component for connecting and positioning the PET detector mainboard. The number of the positioning components is set corresponding to the number of the PET detector mainboards. Each group of the positioning components includes connecting ear plates symmetrically arranged at the left and right ends of the front connecting plate. The connecting ear plate is an L-shaped structure. A third type of connecting hole is provided on one side parallel to the PET detector mainboard. Third type of openings are also provided on the left and right sides of the PET detector mainboard corresponding to the third type of connecting holes. The PET detector mainboard and the front connecting plate are connected and positioned via bolts passing through the third type of connecting holes and the third type of openings.

[0010] Furthermore, the hanging device also includes a crystal shading structure, and the crystal shading structure is used to accommodate and shield the plurality of crystal units and the circuit adapter board.

[0011] Preferably, the crystal shading structure is a hollow rectangular parallelepiped structure with three openings, including a cover bottom plate and two cover side plates, the cover bottom plate and the cover side plates are respectively bent vertically at both ends, the two sets of cover side plates are arranged on the two long sides of the cover bottom plate and are arranged in the same direction as the bent end of the cover bottom plate to form a horizontal opening of the crystal shielding cover, the circuit adapter plate and the front end connecting plate cover the horizontal opening to cooperate to form the upper, lower, front and back four sides of the crystal unit shading;

[0012] The bent ends of the two groups of cover side panels are arranged opposite to each other and cooperate with the two bent ends of the cover bottom plate to form two vertical openings of the crystal shading structure. The two shell side panels of the PET detector housing are respectively provided with downward opening slots corresponding to the vertical openings on the same side. The PET detector housing and the PET crystal shading structure are connected via the bent ends and the slots to cooperate to form shading shielding on the left and right sides of the crystal unit.

[0013] Furthermore, the lateral opening of the crystal light shielding structure is set to correspond to the size of the peripheral sides of the plurality of crystal units to accommodate the crystal units;

[0014] Furthermore, the heights of the two groups of cover side panels are higher than the height of the PET crystal unit, a plurality of second-type openings are arranged on the panel surface of the cover side panels higher than the PET crystal unit, a plurality of second-type connecting holes are correspondingly arranged on the lower parts of the front and rear side walls of the front-end connecting plate, and the two groups of cover side panels are fixedly connected to the front-end connecting plate via bolts passing through the second-type connecting holes and the second-type openings.

[0015] Furthermore, the length of the bent end is not less than 1 mm.

[0016] Furthermore, the thickness of the cover bottom plate and the two cover side plates is not less than 0.2 mm.

[0017] The present invention also discloses a PET detector module, comprising a detector housing, at least one crystal unit, at least one PET detector mainboard and the above-mentioned hanging device.

[0018] The present invention discloses a hanging device for a PET crystal unit (including a scintillation crystal array and a photodetector array). After the crystal unit and the circuit adapter board are communicated and initially positioned by the cooperation of the circuit adapter board and the front connecting board, the crystal shading structure is installed and connected with the two shell side plates of the detector housing to accommodate and shade the crystal unit (entering through the transverse opening). The crystal shading structure and the detector housing are respectively fixedly connected to the front connecting board through the first type of connection hole and the second type of connection hole on the front connecting board, so that the hanging of the entire crystal unit (detector template) can be realized. The overall structure is stable and not easy to loosen. At the same time, the crystal unit is encapsulated in the sealed space formed by the crystal shading structure, the two shell side plates, the circuit adapter board, and the front connecting board through the crystal shading structure, so as to achieve shading and impact protection. Thus, the problem of assembling and shielding multiple crystals is solved, and the device is easy to assemble and disassemble, which is convenient for mass production and rapid replacement and maintenance of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the installation of an embodiment of a hanging device for a PET crystal unit shown in the present invention;

[0020] Figure 2 for Figure 1 A schematic structural diagram of the front end connection plate in the illustrated embodiment;

[0021] Figure 3 for Figure 1 A schematic structural diagram of a crystal light-shielding structure in the illustrated embodiment;

[0022] In the figure: crystal shading structure 110, cover bottom plate 111, cover side plate 112, bent end 113, second type opening 114, circuit adapter plate 120, front end connecting plate 130, fourth type connecting hole 131, slot 133, first type connecting hole 134, second type connecting hole 135, connecting ear plate 136, third type connecting hole 137, shell side plate 200, card slot 210, crystal unit 300, PET detector main board 400. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the present invention discloses a hanging device of a PET crystal unit 300, which is used for connecting the crystal unit 300 and the PET detector main board 400 in the PET detector module, and includes a circuit adapter board 120 and a front end connection board 130 arranged in sequence from bottom to top.

[0024] The circuit adapter board 120 is used to forward the data collected by the crystal unit 300 to the PET detector main board 400 for processing. It is arranged between the crystal shading structure 110 and the front end connecting board 130, and is communicated and connected with the crystal unit 300 and the PET detector main board 400 respectively; the front end connecting board 130 is an integrated structure, which is mainly used to provide installation connection points and support and fixation of the detector main board, so as to be used for connection and fixation with external detector module components and internal components of the hanging device. The front end connecting board 130 is arranged between the circuit adapter board 120 and the detector main board. The left and right side wall ends of the front end connecting board 130 are respectively fixedly connected to the two shell side panels of the detector shell, and a slot is arranged on the front end connecting board 130. After the detector main board 400 is mounted on the front end connecting board 130, the detector main board 130 can be communicated and connected with the circuit adapter board 120 through the slot 133. At the same time, multiple installation points are arranged on the front and rear side walls of the front end connecting board 130 to be fixedly connected with the detector shell and the crystal shading structure 110.

[0025] like Figure 1As shown, the circuit adapter board 120 is used to forward the data collected by the crystal unit 300 to the PET detector main board for processing, and includes a circuit board, a plurality of data collection interfaces arranged on one end surface of the circuit board, and a data summary interface arranged on the other end surface of the circuit board. The plurality of data collection interfaces are arranged in a one-to-one correspondence with the plurality of crystal units, and the detection circuit board of each group of crystal units is communicatively connected with the corresponding data collection interface, and the data summary interface is communicatively connected with the PET detector main board 400;

[0026] like Figure 1 and Figure 3 As shown, fourth-type connecting holes 131 are arranged on the left and right side walls of the front-end connecting plate 130, and fourth-type openings are arranged correspondingly on the two shell side plates of the detector housing. The front-end connecting plate 130 and the detector housing are initially fixedly connected via the fourth-type connecting holes 131, the fourth-type openings and connecting bolts. A slot 133 is arranged on the front-end connecting plate 130. After the detector main board 400 is mounted on the front-end connecting plate 130, it can be communicatively connected with the circuit adapter board 120 through the slot 133; a plurality of first-type connecting holes 134 are arranged on the upper part of the front and rear side walls of the front-end connecting plate 130, and a plurality of first-type openings are arranged on the detector housing corresponding to the plurality of first-type connecting holes. The detector housing and the circuit adapter board are fixedly connected via bolts passing through the first-type connecting holes 134 and the first-type openings.

[0027] As a preferred option, Figure 1 In the illustrated embodiment, positioning components for connecting and positioning the PET detector mainboard 400 are also provided on the left and right ends of the front connection plate 130. The number of positioning components is set corresponding to the number of PET detector mainboards. Each group of positioning components includes connecting ear plates 136 symmetrically arranged on the left and right ends of the front connection plate 130. The connecting ear plates are L-shaped structures, and a third type of connecting hole 137 is arranged on one side parallel to the PET detector mainboard. The third type of openings are also arranged on the left and right sides of the PET detector mainboard corresponding to the third type of connecting holes. The third type of openings are connected to the front connection plate 130 via bolts passing through the third type of connecting holes and the third type of openings. When the PET detector mainboard 400 is installed, the third type of connecting hole is first installed in the L-shaped limiting structure of the connecting ear plate 136, and then fastened and connected via bolts, so that the installation position of the PET detector mainboard 400 in the detector module can be determined, and when it passes through the slot 133 to communicate with the circuit adapter board 120. This arrangement, on the one hand, can effectively fix the PET detector mainboard itself in the detector module and improve the structural stability of the entire detector module; on the other hand, by positioning the connecting ear plate, the installation position of the PET detector mainboard can be conveniently and quickly determined during the assembly of the detector module.

[0028] Furthermore, the hanging device also includes a crystal shading structure 110, and the crystal shading structure 110 is used to accommodate and shield a plurality of crystal units 300; Figure 1 and Figure 2 As shown, the PET crystal light shielding structure 110 is used to cooperate with the PET detector housing, the circuit adapter board 120 and the front connecting board 130 to provide sealing for the PET crystal unit 300. The PET crystal light shielding structure 110 is a hollow rectangular parallelepiped structure with three openings, which is stamped from a whole plate, including a cover bottom plate 111 located at the bottom and two sets of cover side plates 112 located at the front and rear sides. The cover bottom plate 111 and the two sets of cover side plates 112 are both vertically bent at both ends. The two sets of cover side plates 112 are arranged on the two long sides of the cover bottom plate 111, and are arranged in the same direction as the bent end of the cover bottom plate 111 to form a horizontal opening of the crystal light shielding structure 110 (located on the upper side of the crystal light shielding structure). The crystal unit 30 0 can be installed in the PET crystal light-shielding structure 110 through the horizontal opening, the two bent ends of the two sets of cover side panels 112 are arranged opposite to each other, and cooperate with the two bent ends 113 of the cover bottom plate 111 to form two vertical openings of the PET crystal light-shielding structure, and the two shell side panels 200 of the PET detector housing are respectively provided with downward opening card slots 210 corresponding to the vertical openings on the same side, and the PET detector housing and the crystal light-shielding structure are connected by six sets of bent ends and the card slots 210 to cooperate to form left and right side lateral light-shielding shielding of the crystal unit.

[0029] The height of the two sets of covering side panels is higher than the height of the PET crystal unit 300. A plurality of second-type openings 114 are arranged on the plate surface portion of the covering side panels 112 which is higher than the PET crystal unit. A plurality of second-type connection holes 135 are arranged correspondingly on the lower portions of the front and rear side walls of the front-end connecting plate 130. After the circuit adapter board 120 is connected to the crystal unit 300, the entire board is installed in the crystal shading structure 110. The crystal shading structure 110 and the front-end connecting plate are fixedly connected via bolts passing through the second-type connection holes 135 and the second-type openings 114.

[0030] Specifically, the hollow main body structure composed of two groups of cover side panels 112 and a cover bottom plate 111 accommodates the crystal unit 300, and cooperates with the circuit adapter board 120 and the front end connecting board 130 to achieve shading of the crystal unit 300 in four directions of front, back, up and down; the left and right vertical openings of the PET crystal shading structure 110 are composed of the cover side panels 112 and the bent ends of the two groups of cover bottom plates 111, and the two shell side panels 200 are respectively corresponding to the vertical openings on the same side to set the card slots 210 with the openings facing downward, and the two cooperate to achieve shading on the left and right sides of the crystal unit.

[0031] In one embodiment, the number of crystal units 300 is greater than or equal to two, and the multiple crystal units 300 are arranged in a row and aligned. The size of the lateral opening of the PET crystal shading structure 100 corresponds to the size of the circumference of the multiple crystals to accommodate the crystal units; the PET crystal shading structure 110 is made of non-heavy metal material and is relatively thin. The thickness range of the cover bottom plate and the two cover side plates is not less than 0.2mm (mainly considering the pass rate of γ photons), and the length of the bending ends of the cover bottom plate and the two cover side plates is not less than 1mm to provide effective clamping.

[0032] The present invention discloses a PET crystal unit hanging device, which realizes the communication connection between the crystal unit and the PET detector mainboard through the cooperation of the circuit adapter board 120 and the front connecting board 130, installs and connects the crystal light shielding structure with the two shell side plates 200 to accommodate and light shield the crystal unit 300 (entering through the transverse opening), and then fixes the crystal light shielding structure 110 and the detector shell to the front connecting board 130 through the first type of connection hole 134 and the second type of connection hole 135 on the front connecting board 130, respectively, so as to realize the hanging of the entire crystal unit 300 (detector template), and the overall structure is stable and not easy to loosen. At the same time, the crystal unit 300 is encapsulated in the sealed space formed by the crystal light shielding structure 110, the two shell side plates 200, the circuit adapter board 120, and the front connecting board 130 through the crystal light shielding structure, so as to realize light shielding and impact protection. Thus, the problem of assembling and shielding multiple crystals is solved, and the device is easy to assemble and disassemble, and is convenient for mass production and rapid replacement and maintenance of components.

[0033] The above description of the embodiments is to facilitate the understanding and use of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A PET crystal unit mounting device, for mounting a crystal unit of a PET detector module, wherein the PET detector module comprises a detector housing, at least one crystal unit and at least one PET detector mainboard, characterized in that: The hanging device includes a circuit adapter plate and a front end connecting plate; The circuit adapter board is arranged between the crystal unit and the front-end connection board, and is respectively connected to the crystal unit and the PET detector mainboard for communication, so as to forward the data collected by the crystal unit to the PET detector mainboard for processing; The front-end connecting plate is arranged between the circuit adapter plate and the detector main board, and the two ends of the front-end connecting plate are respectively fixedly connected to the two shell side plates of the detector housing, and the front-end connecting plate is provided with a slot, and the detector main board is mounted on the front-end connecting plate, and the detector main board is communicatively connected with the circuit adapter plate through the slot, and a plurality of mounting points are arranged on the front and rear side walls of the front-end connecting plate to be fixedly connected with the detector housing; The circuit adapter board includes a circuit board, a plurality of data acquisition interfaces arranged on one end surface of the circuit board, and a data summary interface arranged on the other end surface of the circuit board, the plurality of data acquisition interfaces are arranged in one-to-one correspondence with the plurality of crystal units, the detection circuit board of each group of the crystal units is communicatively connected with the corresponding data acquisition interface, and the data summary interface is communicatively connected with the PET detector mainboard; The front connecting plate is also provided with positioning components for connecting and positioning the PET detector mainboard. The number of the positioning components corresponds to the number of the PET detector mainboards. Each group of the positioning components includes connecting ear plates symmetrically arranged at the left and right ends of the front connecting plate.

2. The hitch device according to claim 1, characterized in that: The detector housing is bolted to the front end connecting plate, a plurality of first-class connecting holes are arranged on the upper parts of the front and rear side walls of the front end connecting plate, a plurality of first-class openings are arranged on the front and rear side plates of the detector housing corresponding to the plurality of first-class connecting holes, a plurality of fourth-class connecting holes are arranged on the left and right side walls of the front end connecting plate, a plurality of fourth-class openings are arranged correspondingly on the left and right shell side plates of the detector housing, the detector housing and the front end connecting plate are fixedly connected by bolts passing through the first-class connecting holes and the first-class openings, and through the fourth-class connecting holes and the fourth-class openings.

3. The hitch device according to claim 1, characterized in that: The connecting ear plate is an L-shaped structure, and a third-type connecting hole is provided on one side parallel to the PET detector mainboard. Third-type openings are also provided on the left and right sides of the PET detector mainboard corresponding to the third-type connecting holes. The PET detector mainboard and the front connecting plate are connected and positioned via bolts passing through the third-type connecting holes and the third-type openings.

4. The hitch device according to claim 1, characterized in that: It also includes a crystal light-shielding structure, which is used to accommodate and shield a plurality of the crystal units and the circuit adapter board.

5. The hitch device according to claim 4, characterized in that: The crystal light-shielding structure is a hollow rectangular parallelepiped structure with three openings, including a cover bottom plate and two cover side plates, the cover bottom plate and the cover side plates are respectively bent vertically at both ends, the two sets of cover side plates are arranged on the two long sides of the cover bottom plate and are arranged in the same direction as the bent end of the cover bottom plate to form a horizontal opening of the crystal shielding cover, the circuit adapter plate and the front end connecting plate cover the horizontal opening to cooperate to form the upper, lower, front and back four sides of the crystal unit. The bent ends of the two groups of cover side panels are arranged opposite to each other and cooperate with the two bent ends of the cover bottom plate to form two vertical openings of the crystal shading structure. The two shell side panels of the detector housing are respectively provided with downward opening slots corresponding to the vertical openings on the same side. The detector housing and the crystal shading structure are connected via the bent ends and the slots to cooperate to form light shading shielding on the left and right sides of the crystal unit.

6. The hitch device according to claim 5, characterized in that: The lateral opening of the crystal light shielding structure is set corresponding to the size of the peripheral sides of the plurality of crystal units to accommodate the crystal units.

7. The hitch device according to claim 5, characterized in that: The heights of the two groups of cover side panels are higher than the height of the crystal unit, and a plurality of second-type openings are arranged on the panel surface of the cover side panels that is higher than the crystal unit. A plurality of second-type connecting holes are correspondingly arranged on the lower parts of the front and rear side walls of the front-end connecting plate, and the two groups of cover side panels are fixedly connected to the front-end connecting plate via bolts passing through the second-type connecting holes and the second-type openings.

8. The hitch device according to claim 5, characterized in that: The length of the bent end is not less than 1 mm.

9. The hitch device according to claim 5, characterized in that: The thickness of the crystal light-shielding structure is not less than 0.2 mm.

10. A PET detector module, characterized in that: It comprises a detector housing, at least one crystal unit, at least one PET detector mainboard and a hanging device as claimed in any one of claims 1 to 9.

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