An improved positron tomography device for boron neutron detection

Abstract

The present invention relates to the technical field of boron neutron detection, and specifically to an improved positron tomography device for boron neutron detection, comprising a support fixed on a base and a scanning device body slidably arranged on the base, wherein the scanning device body is arranged on the base through a sliding support component, and the scanning device body is driven to slide so that the support supports the patient's head and extends into the scanning device body; a positioning component is also arranged on the support, and after the patient's shoulder presses against the support, the support structure of the support is changed to achieve stable support for the patient's head, thereby reducing system noise, reducing system drift caused by temperature fluctuations, and improving image quality.

Description

Technical Field

[0001] The invention relates to the technical field of boron neutron detection, in particular to an improved positron tomography device for boron neutron detection. Background Art

[0002] BNCT is an advanced radiotherapy technology that uses neutrons to capture boron-10 atoms accumulated in tumor cells to produce alpha particles and 7Li particles with high energy transfer line density, thereby selectively killing tumor cells. Before treatment, patients need to be injected with boron-containing drugs, and the distribution and concentration of boron in the body are tracked and measured by technologies such as positron tomography (PET). This is also a form of boron neutron detection, which is used to ensure that boron drugs are correctly accumulated in tumor tissue. When using positron tomography (PET) technology to monitor the distribution and concentration of boron drugs in the body in real time, the spatial resolution is limited. The spatial resolution of PET images is relatively low, and it may be difficult to clearly distinguish the subtle differences between the edge of the tumor and the surrounding normal tissue, resulting in inaccurate evaluation of the distribution of boron drugs at the tumor boundary. There are also certain challenges in accurately measuring the quantitative concentration of boron drugs, which is affected by many factors, such as the accuracy of attenuation correction and the accuracy of scatter correction.

[0003] In order to obtain clear and stable scanned images, the detectors and electronics in the positron emission tomography scanner need to work in a suitable and stable temperature environment. Increased temperature will significantly increase the system noise, and temperature fluctuations will cause system drift, thereby reducing image quality. Therefore, the cooling system is one of the key components to ensure the quality of the positron emission tomography scanner. In order to avoid false detection events, the electrical noise generated by the photodetector array is lower than the electrical signal generated in response to the scintillation photons. One technique to reduce the noise generated by the photodetector array is to cool the photodetector array; the noise performance of the photodetector array including the silicon photomultiplier "SiPM" detector can be improved by cooling. Conventional cooling systems in PET imaging systems are not suitable for achieving lower temperatures, which is achieved in order to improve the noise performance of the photodetector array in PET imaging systems. In addition, the heat load of conventional cooling systems is usually dissipated in the scanning room where PET imaging is performed. Increasing the heat load to reduce the temperature of the photodetector array will bring secondary challenges to the heat dissipation of the scanning room. Therefore, there is still room for improving the cooling of PET imaging systems to further improve their performance. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an improved positron tomography device for boron neutron detection, which cools down the detection component of the PET device through a cooling component and can work in a suitable and stable temperature environment, thereby reducing system noise, reducing system drift caused by temperature fluctuations, and improving image quality.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An improved positron tomography device for boron neutron detection comprises a support fixed on a base and a scanning device body slidably arranged on the base, wherein the scanning device body is arranged on the base through a sliding support assembly, and the scanning device body is driven to slide so that the support supports the patient's head and extends into the scanning device body; a positioning assembly is also arranged on the support, and after the patient's shoulder presses against the support, the support structure of the support is changed to achieve stable support for the patient's head; a support frame is arranged inside the scanning device body, and a plurality of detection assemblies are mounted and fixed on the support frame, and a cooling assembly is arranged between the detection assemblies, and the cooling assembly comprises an air cooling system and a water cooling system, the air cooling system is connected to an exhaust assembly arranged on one side of the scanning device body, and the air flow in the cooling assembly is increased through the exhaust assembly, and the water cooling system is connected to a circulation pipeline arranged in the support frame to achieve liquid circulation in the cooling assembly; the detection assembly is made to work in a stable temperature environment through the cooling assembly to reduce system drift.

[0007] Furthermore, the scanning device body includes a shell, a baffle, a receiving component, and a transmitting component. The support frame is arranged in the shell, and the exhaust component is connected to the cooling component through the support frame; the inner circle of the support frame is sequentially provided with a transmitting component and a receiving component, and the transmitting component and the receiving component are fixedly connected to the shell through the baffle, and the bottom of the shell is connected to the sliding support component.

[0008] Furthermore, the support frame includes a front support ring and a rear support ring, and an inner support ring located on the inner sides of the front support ring and the rear support ring, a plurality of outer mounting plates are arranged circumferentially between the front support ring and the rear support ring, and a plurality of inner mounting plates are arranged circumferentially of the inner support ring; the detection assembly is a square box body, a first end of the detection assembly is fixedly connected to the inner support ring through two inner mounting plates, a second end of the detection assembly is fixedly connected to the front support ring and the rear support ring through two outer mounting plates, the first ends of two adjacent detection assemblies abut against each other, and the second ends of two adjacent detection assemblies are spaced a certain distance apart, so that a triangular prism space is formed between the two adjacent detection assemblies, a cooling assembly is arranged in the triangular prism space, the cooling assembly is fixedly connected to two opposite outer mounting plates on the detection assemblies on both sides, and the side surfaces of the cooling assembly abut against the surfaces of the detection assemblies on both sides for heat exchange.

[0009] Furthermore, the cooling component includes an outer shell, an inner shell, a heat exchange component, a spiral baffle, a coolant inlet and a coolant outlet; the inner shell is sleeved inside the outer shell, and the cross-sections of the outer shell and the inner shell are both triangular, the space between the outer shell and the inner shell is the water cooling system of the cooling component, and the space inside the inner shell is the air cooling system of the cooling component; the outer shell, the inner shell and the sealing rings on both sides form a sealed space, one end of the sealed space is provided with a coolant inlet connected to the circulation pipeline inside the front support ring, and the other end of the sealed space is provided with a coolant outlet connected to the circulation pipeline inside the rear support ring; the spiral baffle is provided on the inner shell and is located between the outer shell and the inner shell, and the spiral baffle extends continuously and spirally on the surface of the inner shell, so that after the coolant enters the sealed space, it can produce a flow direction consistent with the extension direction of the spiral baffle.

[0010] Furthermore, the exhaust assembly includes a first air suction port, a second air suction port, a fan and a ventilation duct, the ventilation duct is respectively connected to the first air suction port and the second air suction port, and multiple fans are arranged in the first air suction port and the second air suction port; the interior of the inner shell is a hollow structure with openings on both sides, a heat exchange assembly is arranged in the hollow structure, and the opening on one side of the inner shell is connected to the ventilation duct.

[0011] Furthermore, the heat exchange component includes multiple groups of staggered heat sinks, and specifically the heat sinks have upper protrusions and lower protrusions, the upper protrusions of the heat sinks in the front row correspond to the lower protrusions of the heat sinks in the rear row, and the lower protrusions of the heat sinks in the front row correspond to the upper protrusions of the heat sinks in the rear row; when air passes through the interior of the inner shell, the upper protrusions and lower protrusions of the multiple groups of staggered heat sinks cut the air and increase the heat exchange contact area between the heat sinks and the air.

[0012] Furthermore, the support platform includes an arc-shaped plate, a fixed side plate, a movable side plate and a mounting portion, one end of the arc-shaped plate is fixedly connected to the base through the mounting portion, and fixed side plates and movable side plates are provided on both sides of the arc-shaped plate, and the movable side plate is located on the side of the arc-shaped plate close to the mounting portion; after the patient's head is supported on the arc-shaped plate, the posture is further adjusted and the movable side plate is driven to move by the positioning component, so that the movable side plate abuts against the patient's lower jaw to achieve stable support and positioning of the patient's head.

[0013] Furthermore, the positioning assembly includes an abutment plate and a transmission assembly, the abutment plate is arranged on the front side of the mounting part of the support platform, and the abutment plate drives the movable side plate of the support platform to move through the transmission assembly; the transmission assembly includes a support rod, a first transmission rod and a second transmission rod, the support rod is V-shaped and the middle part is slidably arranged on the sliding seat at the bottom of the support platform, and the two ends of the support rod are respectively fixedly connected to the abutment plate; there are two second transmission rods, and the middle part of the second transmission rod is hinged to the hinge seat at the bottom of the support platform through a rotating shaft; one end of the second transmission rod is fixedly connected to the movable side plate, and the other end is hinged to the first transmission rod through a rotating shaft, and the other end of the first transmission rod is hinged to the middle part of the support rod.

[0014] Furthermore, the sliding support assembly includes two mutually parallel support rails fixed on the base, and sliders arranged on both sides of the bottom of the shell, and the sliders are slidably arranged on the support rails; the first guide part and the second guide part are respectively arranged on both sides of the upper end of the support rails, and the first contact part and the second contact part at both ends of the bottom of the slider are respectively slidably matched with the first guide part and the second guide part.

[0015] Furthermore, the cross-section of the first guide portion and the second guide portion is square, and includes a first end face, a second end face, a third end face and a fourth end face, wherein the angle between the first end face and the third end face and the vertical direction is 45 degrees, so that a right angle of the square cross-section of the first guide portion and the second guide portion faces upward; the first contact portion and the second contact portion are provided with a first contact surface, a second contact surface, and a third contact surface, wherein the first contact surface, the second contact surface, and the third contact surface are slidably matched with the first end face, the second end face, and the third end face respectively.

[0016] Compared with the prior art, the present invention provides an improved positron tomography device for boron neutron detection, which has the following beneficial effects:

[0017] 1. The positron tomography device (PET) of the present invention is provided with a cooling component 9 in the space between the detection components 7 which are closely arranged in the circumferential direction, so as to ensure that the PET device of the present invention works in a suitable and stable temperature environment, thereby reducing system noise and system drift caused by temperature fluctuations, thereby improving image quality.

[0018] 2. The cooling assembly 9 of the present invention includes an air cooling system and a water cooling system. A spiral partition 94 is provided in the coolant cavity to change the flow direction of the coolant, so that the coolant can more fully fill the heat exchange cavity, thereby improving the heat exchange efficiency of the coolant; at the same time, heat dissipation fins 931 that increase the heat exchange area are provided in the air cooling system, thereby further improving the cooling efficiency of the air cooling system.

[0019] 3. The present invention sets a positioning component 3 on one side of the support platform 2, so that after the patient lies down, the head is placed on the support platform 2. When adjusting the posture, the shoulder abuts against the positioning component 3, thereby driving the movable side plate 23 on the support platform 2 to move and clamp the patient's jaw area, further improving the supporting stability of the support platform 2, reducing the shaking of the patient's head, and thus improving the detection accuracy of the PET equipment.

[0020] 4. In the present invention, the support rail 81 of the sliding support assembly 8 that supports the scanning device body 4 includes a first guide portion 811 and a second guide portion 812, wherein the guide portion has a square cross-section, and one right angle of the square is vertically upward, so that the sliding abutment surfaces on both sides are inclined to abut against the contact portion of the slider 82, so that the scanning device body 4 can ensure the movement accuracy through the inclined surface during the sliding process, reduce the shaking during the sliding process, and further improve the detection accuracy of the PET device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the positron tomography device of the present invention;

[0022] Figure 2 It is a schematic diagram of an explosion of a positron tomography device of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the support frame and the exhaust assembly of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the support frame of the present invention;

[0025] Figure 5 for Figure 4 A local enlarged schematic diagram in FIG.

[0026] Figure 6 It is a structural schematic diagram of the support frame of the present invention without installing the detection assembly;

[0027] Figure 7 for Figure 6 A local enlarged schematic diagram in FIG.

[0028] Figure 8 It is a schematic diagram of the structure of the detection component and the cooling component of the present invention;

[0029] Fig. 9 It is a schematic diagram of the internal structure of the cooling assembly of the present invention;

[0030] Fig.10 is a cross-sectional view of a cooling assembly of the present invention;

[0031] Fig.11 It is a schematic structural diagram of the heat exchange assembly of the present invention;

[0032] Fig.12 It is a structural schematic diagram of the support platform of the present invention;

[0033] Fig.13 It is a bottom view structural schematic diagram of the support platform of the present invention;

[0034] Fig.14 It is a structural schematic diagram of the sliding support assembly of the present invention;

[0035] Fig.15 It is a front view of the sliding support assembly of the present invention;

[0036] In the figure:

[0037] Base 1; support platform 2, arc plate 21, fixed side plate 22, movable side plate 23, mounting portion 24, hinge seat 25, rotating shaft 251, sliding seat 26;

[0038] Positioning assembly 3, abutment plate 31, transmission assembly 32, support rod 321, first transmission rod 322, second transmission rod 323;

[0039] Scanning device body 4, housing 41, baffle 42, receiving component 43, transmitting component 44;

[0040] Air extraction assembly 5, first air suction port 51, second air suction port 52, fan 53, ventilation loop 54;

[0041] Support frame 6, front support ring 61, rear support ring 62, inner support ring 63, outer mounting plate 64, inner mounting plate 65;

[0042] Detection assembly 7; sliding support assembly 8, support rail 81, first guide portion 811, first end surface 8111, second end surface 8112, third end surface 8113, fourth end surface 8114, second guide portion 812, slider 82, first contact portion 821, first contact surface 8211, second contact surface 8212, third contact surface 8213, second contact portion 822;

[0043] Cooling assembly 9, outer shell 91, inner shell 92, heat exchange assembly 93, heat dissipation fins 931, upper protrusion 9311, lower protrusion 9312, spiral partition 94, coolant inlet 95, coolant outlet 96; DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The present invention is described in detail below with reference to the accompanying drawings. The improved positron tomography device for boron neutron detection of the present invention comprises a support table 2 fixed on a base 1 and a scanning device body 4 slidably arranged on the base 1. The scanning device body 4 is arranged on the base 1 through a sliding support component 8. The scanning device body 4 is driven to slide so that the support table 2 supports the patient's head and extends into the scanning device body 4. A positioning component 3 is also provided on the support table 2. After the patient's shoulder is pressed against the support table 2, the support structure of the support table 2 is changed to achieve stable support for the patient's head. A support frame 6 is provided inside the scanning device body 4, and a plurality of detection components 7 are mounted and fixed on the support frame 6. A cooling component 9 is provided between the detection components 7, and the cooling component 9 includes an air cooling system and a water cooling system. The air cooling system is connected to an exhaust component 5 provided on one side of the scanning device body 4, and the air flow in the cooling component 9 is increased through the exhaust component 5. The water cooling system is connected to a circulation pipeline provided in the support frame 6 to realize liquid circulation in the cooling component 9. Through the cooling component 9, the detection component 7 is allowed to work in a stable temperature environment to reduce system drift.

[0046] In an embodiment of the present invention, a cooling component 9 is provided in the space between the detection components 7 which are closely arranged in the circumference inside the positron emission tomography device (PET), so as to ensure that the PET device of the present invention operates in a suitable and stable temperature environment, thereby reducing system noise and system drift caused by temperature fluctuations, thereby improving image quality.

[0047] See attached Figure 2 The scanning device body 4 includes a shell 41, a baffle 42, a receiving component 43, and a transmitting component 44. The support frame 6 is arranged in the shell 41, and the exhaust component 5 is connected to the cooling component 9 through the support frame 6; the inner circle of the support frame 6 is sequentially provided with a transmitting component 44 and a receiving component 43, and the transmitting component 44 and the receiving component 43 are fixedly connected to the shell 41 through the baffle 42, and the bottom of the shell 41 is connected to the sliding support component 8.

[0048] See attached Figure 4The support frame 6 includes a front support ring 61 and a rear support ring 62, and an inner support ring 63 located inside the front support ring 61 and the rear support ring 62. A plurality of outer mounting plates 64 are arranged circumferentially between the front support ring 61 and the rear support ring 62, and a plurality of inner mounting plates 65 are arranged circumferentially between the inner support ring 63; the detection assembly 7 is a square box body, a first end of the detection assembly 7 is fixedly connected to the inner support ring 63 through two inner mounting plates 65, a second end of the detection assembly 7 is fixedly connected to the front support ring 61 and the rear support ring 62 through two outer mounting plates 64, the first ends of two adjacent detection assemblies 7 abut against each other, and the second ends of two adjacent detection assemblies 7 are spaced a certain distance apart, so that a triangular prism space is formed between the two adjacent detection assemblies 7, a cooling assembly 9 is arranged in the triangular prism space, the cooling assembly 9 is fixedly connected to the two opposite outer mounting plates 64 on the detection assemblies 7 on both sides, and the side surfaces of the cooling assembly 9 abut against the surfaces of the detection assemblies 7 on both sides for heat exchange.

[0049] See attached Figure 8 The cooling assembly 9 includes an outer shell 91, an inner shell 92, a heat exchange assembly 93, a spiral baffle 94, a coolant inlet 95 and a coolant outlet 96; the inner shell 92 is sleeved inside the outer shell 91, and the cross-sections of the outer shell 91 and the inner shell 92 are both triangular. The space between the outer shell 91 and the inner shell 92 is the water cooling system of the cooling assembly 9, and the space inside the inner shell 92 is the air cooling system of the cooling assembly 9; the outer shell 91, the inner shell 92 and the sealing rings on both sides form a sealed space. A coolant inlet 95 connected to the circulation pipeline inside the front support ring 61 is provided at one end of the sealed space, and a coolant outlet 96 connected to the circulation pipeline inside the rear support ring 62 is provided at the other end of the sealed space; the spiral baffle 94 is provided on the inner shell 92 and is located between the outer shell 91 and the inner shell 92, and the spiral baffle 94 extends continuously and spirally on the surface of the inner shell 92, so that the coolant can generate a flow direction consistent with the extension direction of the spiral baffle 94 after entering the sealed space.

[0050] See attached Figure 3 The exhaust component 5 includes a first air suction port 51, a second air suction port 52, a fan 53 and a ventilation loop 54. The ventilation loop 54 is respectively connected to the first air suction port 51 and the second air suction port 52. A plurality of fans 53 are arranged in the first air suction port 51 and the second air suction port 52. The interior of the inner shell 92 is a hollow structure with openings on both sides. A heat exchange component 93 is arranged in the hollow structure. The opening on one side of the inner shell 92 is connected to the ventilation loop 54.

[0051] See attached Fig.11The heat exchange component 93 includes a plurality of groups of heat dissipation fins 931 connected in an offset manner. Specifically, the heat dissipation fins 931 have an upper protrusion 9311 and a lower protrusion 9312. The upper protrusion 9311 of the heat dissipation fins 931 in the front row corresponds to the lower protrusion 9312 of the heat dissipation fins 931 in the rear row, and the lower protrusion 9312 of the heat dissipation fins 931 in the front row corresponds to the upper protrusion 9311 of the heat dissipation fins 931 in the rear row. When air passes through the interior of the inner shell 92, the upper protrusions 931 and the lower protrusions 9312 of the plurality of groups of heat dissipation fins 931 connected in an offset manner cut the air and increase the heat exchange contact area between the heat dissipation fins 931 and the air.

[0052] In an embodiment of the present invention, the cooling component 9 includes an air cooling system and a water cooling system. A spiral partition 94 is arranged in the coolant cavity to change the flow direction of the coolant, so that the coolant can more fully fill the heat exchange cavity, thereby improving the heat exchange efficiency of the coolant; at the same time, heat dissipation fins 931 that increase the heat exchange area are arranged in the air cooling system, thereby further improving the cooling efficiency of the air cooling system.

[0053] See attached Fig.12 and 13 The support platform 2 includes an arc-shaped plate 21, a fixed side plate 22, a movable side plate 23 and a mounting portion 24. One end of the arc-shaped plate 21 is fixedly connected to the base 1 through the mounting portion 24. Fixed side plates 22 and movable side plates 23 are provided on both sides of the arc-shaped plate 21. The movable side plate 23 is located on one side of the arc-shaped plate 21 close to the mounting portion 24. After the patient's head is supported on the arc-shaped plate 21, the posture is further adjusted and the movable side plate 23 is driven to move by the positioning component 3, so that the movable side plate 23 abuts against the patient's lower jaw to achieve stable support and positioning of the patient's head.

[0054] The positioning assembly 3 includes an abutment plate 31 and a transmission assembly 32, wherein the abutment plate 31 is arranged on the front side of the mounting portion 24 of the support platform 2, and the abutment plate 31 drives the movable side plate 23 of the support platform 2 to move through the transmission assembly 32; the transmission assembly 32 includes a support rod 321, a first transmission rod 322 and a second transmission rod 323, wherein the support rod 321 is V-shaped and the middle part is slidably arranged on the sliding seat 26 at the bottom of the support platform 2, and the two ends of the support rod 321 are respectively fixedly connected to the abutment plate 31; there are two second transmission rods 323, and the middle part of the second transmission rod 323 is hinged to the hinge seat 25 at the bottom of the support platform 2 through a rotating shaft 251; one end of the second transmission rod 323 is fixedly connected to the movable side plate 23, and the other end is hinged to the first transmission rod 322 through a rotating shaft, and the other end of the first transmission rod 322 is hinged to the middle part of the support rod 321.

[0055] A positioning component 3 is provided on one side of the support platform 2, so that after the patient lies down, the head is placed on the support platform 2, and when adjusting the posture, the shoulder abuts against the positioning component 3, thereby driving the movable side plate 23 on the support platform 2 to move and clamp the patient's jaw area, further improving the supporting stability of the support platform 2, reducing the shaking of the patient's head, and thus improving the detection accuracy of the PET equipment.

[0056] See attached Fig.14 and 15 The sliding support assembly 8 includes two mutually parallel support rails 81 fixed on the base 1, and sliders 82 arranged on both sides of the bottom of the shell 41, and the sliders 82 are slidably arranged on the support rails 81; the first guide part 811 and the second guide part 812 are respectively arranged on both sides of the upper end of the support rail 81, and the first contact part 821 and the second contact part 822 at the two ends of the bottom of the slider 82 are respectively slidably matched with the first guide part 811 and the second guide part 812.

[0057] The cross-section of the first guide portion 811 and the second guide portion 812 is square, and includes a first end face 8111, a second end face 8112, a third end face 8113 and a fourth end face 8114, wherein the angle between the first end face 8111 and the third end face 8113 and the vertical direction is 45 degrees, so that a right angle of the square cross-section of the first guide portion 811 and the second guide portion 812 faces upward; the first contact portion 821 and the second contact portion 822 are provided with a first contact surface 8211, a second contact surface 8212, and a third contact surface 8213, wherein the first contact surface 8211, the second contact surface 8212, and the third contact surface 8213 are slidably matched with the first end face 8111, the second end face 8112, and the third end face 8113 respectively.

[0058] In an embodiment of the present invention, the support rail 81 of the sliding support assembly 8 supporting the scanning device body 4 includes a first guide portion 811 and a second guide portion 812, wherein the guide portion has a square cross-section, and a right angle of the square is vertically upward, so that the sliding abutment surfaces on both sides are inclined to abut against the contact portion of the slider 82, so that the scanning device body 4 can ensure the movement accuracy through the inclined surface during the sliding process, reduce the shaking during the sliding process, and further improve the detection accuracy of the PET device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved positron tomography device for boron neutron detection, comprising a support (2) fixed on a base (1) and a scanning device body (4) slidably arranged on the base (1), characterized in that: The scanning device body (4) is arranged on the base (1) via a sliding support component (8), and the scanning device body (4) is driven to slide so that the support platform (2) supports the patient's head and extends into the scanning device body (4); the support platform (2) is also provided with a positioning component (3), and after the patient's shoulder presses against the support platform (2), the support structure of the support platform (2) is changed to achieve stable support for the patient's head; a support frame (6) is arranged inside the scanning device body (4), and a plurality of detection components (7) are fixedly mounted on the support frame (6), and the detection components (7) is provided with a cooling assembly (9), the cooling assembly (9) comprising an air cooling system and a water cooling system, the air cooling system is connected to an exhaust assembly (5) provided on one side of the scanning device body (4), and the air flow in the cooling assembly (9) is increased through the exhaust assembly (5), and the water cooling system is connected to a circulation pipeline provided in the support frame (6) to realize liquid circulation in the cooling assembly (9); the cooling assembly (9) enables the detection assembly (7) to work in a stable temperature environment to reduce system drift; the cooling assembly (9) comprises an outer shell (91), an inner shell The inner shell (92), the heat exchange component (93), the spiral partition (94), the coolant inlet (95) and the coolant outlet (96); the inner shell (92) is sleeved inside the outer shell (91), and the cross-sections of the outer shell (91) and the inner shell (92) are both triangular; the space between the outer shell (91) and the inner shell (92) is the water cooling system of the cooling component (9), and the space inside the inner shell (92) is the air cooling system of the cooling component (9); the outer shell (91), the inner shell (92) and the sealing rings on both sides form a sealed space, and the sealing ring A coolant inlet (95) connected to a circulation pipeline inside the front support ring (61) is provided at one end of the sealed space, and a coolant outlet (96) connected to a circulation pipeline inside the rear support ring (62) is provided at the other end of the sealed space; the spiral baffle (94) is provided on the inner shell (92) and is located between the outer shell (91) and the inner shell (92); the spiral baffle (94) extends continuously and spirally on the surface of the inner shell (92), so that after the coolant enters the sealed space, it can generate a flow direction consistent with the extension direction of the spiral baffle (94).

2. The improved positron tomography device for boron neutron detection according to claim 1, characterized in that: The scanning device body (4) comprises a housing (41), a baffle (42), a receiving assembly (43), and a transmitting assembly (44); the support frame (6) is arranged in the housing (41); the exhaust assembly (5) is connected to the cooling assembly (9) through the support frame (6); the inner circle of the support frame (6) is provided with a transmitting assembly (44) and a receiving assembly (43) in sequence; the transmitting assembly (44) and the receiving assembly (43) are fixedly connected to the housing (41) through the baffle (42); and the bottom of the housing (41) is connected to the sliding support assembly (8).

3. The improved positron tomography device for boron neutron detection according to claim 2 is characterized in that: The support frame (6) comprises a front support ring (61) and a rear support ring (62), and an inner support ring (63) located inside the front support ring (61) and the rear support ring (62); a plurality of outer mounting plates (64) are arranged circumferentially between the front support ring (61) and the rear support ring (62); a plurality of inner mounting plates (65) are arranged circumferentially between the inner support ring (63); and a plurality of inner mounting plates (65) are arranged circumferentially between the inner support ring (63). The detection assembly (7) is a square box body; a first end of the detection assembly (7) is fixedly connected to the inner support ring (63) via two inner mounting plates (65); and a second end of the detection assembly (7) is fixedly connected to the inner support ring (63) via two inner mounting plates (65). The outer mounting plate (64) is fixedly connected to the front support ring (61) and the rear support ring (62); the first ends of two adjacent detection assemblies (7) abut against each other; the second ends of the two adjacent detection assemblies (7) are spaced a certain distance apart, so that a triangular prism space is formed between the two adjacent detection assemblies (7); a cooling assembly (9) is arranged in the triangular prism space; the cooling assembly (9) is fixedly connected to two opposite outer mounting plates (64) on the detection assemblies (7) on both sides; and the side surfaces of the cooling assembly (9) abut against the surfaces of the detection assemblies (7) on both sides for heat exchange.

4. The improved positron tomography device for boron neutron detection according to claim 3 is characterized in that: The exhaust assembly (5) comprises a first air suction port (51), a second air suction port (52), a fan (53) and a ventilation loop (54); the ventilation loop (54) is respectively connected to the first air suction port (51) and the second air suction port (52); a plurality of fans (53) are arranged in the first air suction port (51) and the second air suction port (52); the interior of the inner shell (92) is a hollow structure with openings on both sides; a heat exchange assembly (93) is arranged in the hollow structure; and the opening on one side of the inner shell (92) is connected to the ventilation loop (54).

5. The improved positron tomography device for boron neutron detection according to claim 4 is characterized in that: The heat exchange component (93) comprises a plurality of groups of heat dissipation fins (931) connected in an offset manner. Specifically, the heat dissipation fins (931) have an upper protrusion (9311) and a lower protrusion (9312). The upper protrusion (9311) of the heat dissipation fins (931) in the front row corresponds to the lower protrusion (9312) of the heat dissipation fins (931) in the rear row, and the lower protrusion (9312) of the heat dissipation fins (931) in the front row corresponds to the upper protrusion (9311) of the heat dissipation fins (931) in the rear row. When air passes through the interior of the inner shell (92), the upper protrusions (9311) and the lower protrusions (9312) of the plurality of groups of heat dissipation fins (931) connected in an offset manner cut the air and increase the heat exchange contact area between the heat dissipation fins (931) and the air.

6. The improved positron tomography device for boron neutron detection according to claim 5, characterized in that: The support platform (2) comprises an arc-shaped plate (21), a fixed side plate (22), a movable side plate (23) and a mounting portion (24); one end of the arc-shaped plate (21) is fixedly connected to the base (1) via the mounting portion (24); fixed side plates (22) and movable side plates (23) are provided on both sides of the arc-shaped plate (21); the movable side plate (23) is located on a side of the arc-shaped plate (21) close to the mounting portion (24); after the patient's head is supported on the arc-shaped plate (21), the posture is further adjusted and the movable side plate (23) is driven to move by the positioning component (3), so that the movable side plate (23) abuts against the patient's lower jaw to achieve stable support and positioning of the patient's head.

7. The improved positron tomography device for boron neutron detection according to claim 6, characterized in that: The positioning assembly (3) comprises an abutment plate (31) and a transmission assembly (32); the abutment plate (31) is arranged at the front side of the mounting portion (24) of the support platform (2); the abutment plate (31) drives the movable side plate (23) of the support platform (2) to move through the transmission assembly (32); the transmission assembly (32) comprises a support rod (321), a first transmission rod (322) and a second transmission rod (323); the support rod (321) is V-shaped and the middle portion is slidably arranged on a sliding seat (23) at the bottom of the support platform (2) 26), the two ends of the support rod (321) are respectively fixedly connected to the abutment plate (31); the second transmission rod (323) is two, and the middle part of the second transmission rod (323) is hinged to the hinge seat (25) at the bottom of the support platform (2) through a rotating shaft (251); one end of the second transmission rod (323) is fixedly connected to the movable side plate (23), and the other end is hinged to the first transmission rod (322) through a rotating shaft, and the other end of the first transmission rod (322) is hinged to the middle part of the support rod (321).

8. The improved positron tomography device for boron neutron detection according to claim 7, characterized in that: The sliding support assembly (8) comprises two mutually parallel support rails (81) fixed on the base (1), and sliders (82) arranged on both sides of the bottom of the housing (41), wherein the sliders (82) are slidably arranged on the support rails (81); a first guide portion (811) and a second guide portion (812) are respectively arranged on both sides of the upper end of the support rails (81), and a first contact portion (821) and a second contact portion (822) at both ends of the bottom of the slider (82) are respectively slidably matched with the first guide portion (811) and the second guide portion (812).

9. The improved positron tomography device for boron neutron detection according to claim 8, characterized in that: The cross-section of the first guide portion (811) and the second guide portion (812) is square, and comprises a first end face (8111), a second end face (8112), a third end face (8113) and a fourth end face (8114), wherein the angle between the first end face (8111) and the third end face (8113) and the vertical direction is 45 degrees, so that a right angle of the square cross-section of the first guide portion (811) and the second guide portion (812) faces upward; the first contact portion (821) and the second contact portion (822) are provided with a first contact surface (8211), a second contact surface (8212) and a third contact surface (8213), wherein the first contact surface (8211), the second contact surface (8212) and the third contact surface (8213) are slidably matched with the first end face (8111), the second end face (8112) and the third end face (8113) respectively.

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