A pet detector module and pet device

Abstract

The application discloses a PET detector module and a PET device, wherein the PET detector module comprises a plurality of PET probes arranged in a ring shape, and according to different gravity center heights, the plurality of PET probes are configured to be divided into at least two groups of parallel water-cooled probes with different numbers, water inlets and outlets of different groups of water-cooled probes are arranged in parallel, and PET probes of each group of water-cooled probes are connected in a series connection mode; the number of the PET probes in the group of water-cooled probes at a lower height is not less than the number of the PET probes in the group of water-cooled probes at a higher height. The application groups all the PET probes, adopts water cooling instead of traditional air cooling, can take away a large amount of heat in a short time, uniformly cools the probes, has a better cooling effect on the PET device, can reduce the difference in heat dissipation effects caused by height differences of the detectors, makes the performance of the detectors consistent, stably works in a unified environment, and thus the overall performance of the device is stable.

Description

Technical Field

[0001] This invention relates to the field of PET technology, and in particular to a PET detector module and PET equipment equipped with a water cooling system. Background Technology

[0002] The probe is a core component in PET and MRI fields. It receives light signals emitted from a source, converts them into electrical signals, and ultimately forms an image for doctors to analyze. Because the probe module generates a significant amount of heat during data processing, heat dissipation is a critical technology limiting its effectiveness.

[0003] Patent CN215191681U describes a probe module that uses contact heat transfer and heat dissipation holes on the circuit board to ensure a compact structure. However, since air flows slowly in local spaces, the heat dissipation efficiency cannot be improved, and the temperature rise will eventually affect the working efficiency of the entire probe module, resulting in a decrease in data processing capability. Furthermore, the practice of opening heat dissipation holes on the circuit board affects the overall layout of the circuit board and reduces space utilization.

[0004] If water cooling is used for the detector, the heights of the probes arranged in a ring are different, and there are many probes. When a single water cooling pipe is used to cool the probes, the temperature rise will inevitably increase gradually along the flow direction of the cooling pipe. The temperature will be uneven between the probes, and the cooling circulation speed will be slow due to the long pipe. It will take longer for the probes to reach a stable working state, and the performance consistency between the probes will be poor. In fact, the cooling effect is not as good as the air cooling solution used in patent CN215191681U.

[0005] How to uniformly water cool a detector with a ring-shaped probe structure is the technical problem that this invention aims to solve. Summary of the Invention

[0006] The technical problem to be solved by the embodiments of the present invention is to provide a PET detector module and PET equipment to solve the problem of uneven probe temperature during the water cooling process.

[0007] To address the aforementioned technical problems, this invention provides a PET detector module, comprising a plurality of PET probes arranged in a ring. Based on different center-of-gravity heights, the plurality of PET probes are configured into at least two groups of water-cooled probes with varying numbers of probes. The inlet and outlet water of different water-cooled probe groups are arranged in parallel. The PET probes within each water-cooled probe group are connected in series. The number of PET probes in the water-cooled probe group at the lower height is not less than the number of PET probes in the water-cooled probe group at the higher height.

[0008] According to one embodiment of the present invention, the different number of PET probes in the water-cooled probe group means that the number of PET probes in at least one water-cooled probe group is different from the number of PET probes in other water-cooled probe groups.

[0009] According to one embodiment of the present invention, the number of water-cooled probe groups is even, and they are arranged symmetrically with respect to the vertical plane.

[0010] According to one embodiment of the present invention, each group of water-cooled probes includes an inlet pipe, an outlet pipe, and a plurality of connecting water pipes connecting two adjacent PET probes. The inlet pipe is connected to the inlet of the first PET probe in the water-cooled probe group, the outlet pipe is connected to the outlet of the last PET probe in the water-cooled probe group, and the connecting water pipes connect the outlet of the previous PET probe and the inlet of the next PET probe.

[0011] According to one embodiment of the present invention, the number of PET probes in the water-cooled probe group located at a lower height is greater than the number of PET probes in the water-cooled probe group located at a higher height, and the number of PET probes decreases as the height increases; the number of PET probes in two water-cooled probe groups with the same or substantially the same height is equal.

[0012] According to one embodiment of the present invention, when the number of water-cooled probe groups is six or more, the distribution area of ​​the PET probes in any one group of water-cooled probe groups does not exceed one-quarter of the circumference enclosed by all the PET probes.

[0013] According to one embodiment of the present invention, the number of PET probes in the water-cooled probe group with the largest number of PET probes shall not exceed twice the number of PET probes in the water-cooled probe group with the smallest number of PET probes.

[0014] According to one embodiment of the present invention, the PET probe includes a photosensitive module, a water-cooling module, and a sub-plate. The water-cooling module is disposed between the photosensitive module and the sub-plate, and exchanges heat with the photosensitive module and the sub-plate respectively.

[0015] According to one embodiment of the present invention, the PET probe further includes a heat-conducting block disposed between the sub-plate and the water-cooling module, for transferring heat from the sub-plate to the water-cooling module.

[0016] According to one embodiment of the present invention, the PET probe further includes a heat-conducting sheet disposed between the photoelectric conversion element and the water-cooling module, for transferring heat from the photoelectric conversion element of the photosensitive module to the water-cooling module.

[0017] According to one embodiment of the present invention, the water-cooling module includes a water-cooling cavity, the water-cooling cavity having a water-cooling chamber, and a water guide pipe connected to each end of the water-cooling cavity to form a water flow path within the water-cooling cavity, the water guide pipe being connected to an external pipeline.

[0018] According to one embodiment of the present invention, the water-cooling cavity is U-shaped, S-shaped, or finger-shaped.

[0019] According to one embodiment of the present invention, the photosensitive module includes a crystal, a photoelectric conversion element, and a connector. The photoelectric conversion element is located between the crystal and the connector and is connected to the rear end of the crystal. The connector is connected to the middle or edge of the photoelectric conversion element and mates with an interface on the daughter board. When the connector is connected to the middle of the photoelectric conversion element, the water-cooling cavity is U-shaped, and a first plug channel is provided in the water-cooling cavity of the water-cooling module. The connector passes through the first plug channel and connects to the daughter board. When the connector is connected to both ends of the photoelectric conversion element, the water-cooling cavity is S-shaped or finger-shaped, and the connector passes through the side wall of the water-cooling module.

[0020] According to one embodiment of the present invention, the water-cooling module further includes an upper cover and a lower cover, and the water-cooling cavity is formed by connecting the upper cover and the lower cover to form a sealed water-cooling cavity.

[0021] According to one embodiment of the present invention, a first semiconductor refrigeration chip is further provided between the water-cooling module and the photoelectric conversion element, and the two side surfaces of the first semiconductor refrigeration chip are respectively attached to the photoelectric conversion element of the water-cooling module and the photosensitive module; and / or, a second semiconductor refrigeration chip is further provided between the water-cooling module and the sub-board, and the two side surfaces of the second semiconductor refrigeration chip are respectively attached to the water-cooling module and the sub-board.

[0022] According to one embodiment of the present invention, the PET probe further includes a light shield, and the photosensitive module is placed in the light shield to be shielded by the light shield.

[0023] According to one embodiment of the present invention, the PET probe further includes connectors, which are arranged in pairs and connect the light shield and the water cooling module.

[0024] According to one embodiment of the present invention, the connector is sheet-shaped, with an inwardly protruding protrusion at the lower end for connection with the light shield, and an inwardly bent connecting piece at the upper end for connection with the water-cooling module.

[0025] According to one embodiment of the present invention, a bayonet is provided on the side wall of the light shield to mate with the protrusion; a screw hole is provided on the water cooling module to connect with the connecting piece, and the screw connected in the screw hole can pass through the heat-conducting block and the sub-plate and then be fixed.

[0026] According to one embodiment of the present invention, the screw holes are located at the four corners of the water-cooling module, and correspondingly, each connector is provided with two connecting pieces.

[0027] According to one embodiment of the present invention, a stepped structure is provided at the position of the screw hole on the water-cooling module to accommodate the connecting piece and the screw nut.

[0028] According to one embodiment of the present invention, the PET probe further includes an external plate, the sub-plate being fixed between the water-cooling module and the external plate, and the water-cooling module being fixed between the photosensitive module and the sub-plate.

[0029] According to a second aspect of the present invention, a PET device is provided, the PET device comprising the PET detector module as described above.

[0030] Implementing this invention has the following beneficial effects:

[0031] The PET detector module provided by this invention uses water cooling instead of traditional air cooling, and provides a technical solution for a water cooling system. Since the water cooling system can increase the water flow rate by controlling the water pump, and water has a large specific heat capacity, it can remove a large amount of heat in a short time. The cooling effect on the PET equipment is better than the air cooling effect of the existing technology, which is conducive to improving the imaging quality.

[0032] The PET detector module provided by this invention groups all PET probes, with the number of probes in each group related to the height of the probes. The number of PET probes decreases as the height increases, thereby reducing the difference in heat dissipation caused by height differences. Based on this, uniform water cooling of the probes is achieved, resulting in better cooling of the PET equipment. At the same time, by reducing the difference in heat dissipation caused by the height difference of the detectors, the performance of the detectors tends to be consistent, and they work stably in a unified environment, thus making the overall performance of the equipment stable.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0035] Figure 1 This is a schematic diagram of the PET detector module in Embodiment 1 of the present invention;

[0036] Figure 2 This is a schematic diagram of the overall structure of the water-cooled PET probe in Embodiment 2 of the present invention;

[0037] Figure 3 This is a schematic diagram of the assembly structure of the water-cooled PET probe in Embodiment 2 of the present invention;

[0038] Figure 4 This is an exploded structural diagram of the water-cooling module of the water-cooled PET probe in Embodiment 2 of the present invention;

[0039] Figure 5 This is a schematic diagram of the assembly structure of the water-cooled PET probe in Embodiment 2 of the present invention;

[0040] Figure 6 This is a schematic diagram of the assembly structure of the water-cooled PET probe in Embodiment 2 of the present invention;

[0041] Figure 7 This is a schematic diagram of the overall structure of the PET probe with active heat dissipation in Embodiment 3 of the present invention;

[0042] Figure 8 This is a schematic diagram of the assembly structure of the actively heat-dissipating PET probe in Embodiment 3 of the present invention;

[0043] Figure 9 This is an exploded structural diagram of the water-cooling module of the PET probe with active heat dissipation in Embodiment 3 of the present invention;

[0044] Figure 10 This is a schematic diagram of the water-cooled cavity of the PET probe with active heat dissipation in Embodiment 3 of the present invention.

[0045] The reference numerals in the figure:

[0046] 100-PET probe;

[0047] 110 - Sunshade; 111 - Bayonet;

[0048] 120 - Photosensitive module; 121 - Crystal; 122 - Photoelectric conversion element; 123 - Connector;

[0049] 130 - Connector; 131 - Protrusion; 132 - Connecting piece;

[0050] 141-Heat-conducting sheet; 142-First semiconductor refrigeration sheet; 143-Second semiconductor refrigeration sheet;

[0051] 150 - Water-cooled module; 151 - Water-cooled cavity; 152 - Water pipe; 153 - Top cover; 154 - Bottom cover; 155 - Screw hole; 156 - First plug channel; 157 - Second plug channel; 158 - Stepped structure;

[0052] 160 - Thermal block;

[0053] 170 - Daughterboard; 171 - Interface; 172 - Output port;

[0054] 180-External board;

[0055] 200 - Connect water pipe;

[0056] 1in - Inlet pipe of the first group of water-cooled probes; 1out - Outlet pipe of the first group of water-cooled probes;

[0057] 2in - Inlet pipe of the second group of water-cooled probes; 2out - Outlet pipe of the second group of water-cooled probes;

[0058] 3in - Inlet pipe of the third group of water-cooled probes; 3out - Outlet pipe of the third group of water-cooled probes;

[0059] 4in - Inlet pipe of the fourth group of water-cooled probes; 4out - Outlet pipe of the fourth group of water-cooled probes;

[0060] 5in - Inlet pipe of the fifth water-cooled probe group; 5out - Outlet pipe of the fifth water-cooled probe group;

[0061] 6in - the inlet pipe of the sixth water-cooled probe group; 6out - the outlet pipe of the sixth water-cooled probe group. Detailed Implementation

[0062] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0063] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0065] Example 1

[0066] like Figure 1 As shown, this embodiment provides a PET detector module, including a plurality of PET probes 100 arranged in a tight ring. Based on different heights, the plurality of PET probes 100 are divided into at least six parallel water-cooled probe groups of varying numbers. Specifically, the first and second water-cooled probe groups are located at the top, the third and sixth water-cooled probe groups are located in the middle, and the fourth and fifth water-cooled probe groups are located at the bottom, thus giving the six water-cooled probe groups different heights. Furthermore, based on the different heights, the number of PET probes within each water-cooled probe group is further divided. In this embodiment, the first and second groups... The water-cooled probe group has 7 PET probes, the third and sixth water-cooled probe groups have 8 PET probes, and the fourth and fifth water-cooled probe groups have 9 PET probes; that is, the number of PET probes decreases as the height increases; the parallel setting of at least six water-cooled probe groups means that the inlet and outlet water channels of different water-cooled probe groups do not interfere with each other. In other words, any water-cooled probe group has one inlet and one outlet. Water flows in from the inlet and out from the outlet. The water flow speed and flow rate between different groups can be adjusted according to the heat exchange requirements.

[0067] The PET probes within each water-cooled probe group are connected in series, specifically:

[0068] The first water-cooled probe group includes a 1-inch inlet pipe and a 1-out outlet pipe. The 1-inch inlet pipe is connected to the first PET probe in the group, and the 1-out outlet pipe is connected to the last PET probe in the group.

[0069] The second water-cooled probe group includes a 2in inlet pipe and a 2out outlet pipe. The 2in inlet pipe is connected to the first PET probe in the group, and the 2out outlet pipe is connected to the last PET probe in the group.

[0070] The third water-cooled probe group includes a 3in inlet pipe and a 3out outlet pipe. The 3in inlet pipe is connected to the first PET probe in the group, and the 3out outlet pipe is connected to the last PET probe in the group.

[0071] The fourth water-cooled probe group includes a 4in inlet pipe and a 4out outlet pipe. The 4in inlet pipe is connected to the first PET probe in the group, and the 4out outlet pipe is connected to the last PET probe in the group.

[0072] The fifth water-cooled probe group includes a 5in inlet pipe and a 5out outlet pipe. The 5in inlet pipe is connected to the first PET probe in the group, and the 5out outlet pipe is connected to the last PET probe in the group.

[0073] The sixth water-cooled probe group includes a 6in inlet pipe and a 6out outlet pipe. The 6in inlet pipe is connected to the first PET probe in the group, and the 6out outlet pipe is connected to the last PET probe in the group.

[0074] Because the PET probes are located at different heights, there is a water pressure difference at the inlet, resulting in different water flow velocities. Figure 1 As shown, the first and second groups contain 7 probes each, the third and sixth groups contain 8 probes each, and the fourth and fifth groups contain 9 probes each. This means that the higher the probe group, the fewer probes are required. This overcomes the drawback of reduced flow rate due to water pressure differences, which leads to low cooling efficiency. It adapts to the varying heat generation of different groups of PET probes within the same timeframe, thus reducing the differences in water cooling performance caused by height differences. Based on this, the embodiments of this application achieve uniform water cooling of the probes, resulting in better cooling of the PET equipment. Furthermore, by reducing the differences in heat dissipation caused by probe height differences, the probe performance becomes more consistent, allowing for stable operation in a uniform environment, thereby stabilizing the overall performance of the equipment.

[0075] The technical concept of this embodiment is that the PET probes 100 in each group of water-cooled probes are arranged continuously and connected in series through the connecting water pipes 200. The number of PET probes 100 in the water-cooled probe group at the lower height is not less than the number of PET probes 100 in the water-cooled probe group at the higher height, and the number of probes in two groups of water-cooled probes at the same or similar heights can also be equal or similar.

[0076] In this embodiment, the number of PET probes 100 in the water-cooled probe group is different, meaning that the number of PET probes 100 in at least one water-cooled probe group is different from the number of PET probes 100 in other water-cooled probe groups; the height of the water-cooled probe group refers to the height of the center of gravity of all PET probes 100 in the water-cooled probe group.

[0077] In this embodiment, the number of water-cooled probe groups is 6, but it can also be 4, 8 or other even numbers, and they are symmetrical about the left and right sides with respect to the vertical plane, so as to ensure that the cooling efficiency of water-cooled probe groups at the same height is basically the same.

[0078] Taking the third water-cooled probe group as an example, it includes a 3in water inlet pipe, a 3out water outlet pipe, and eight connecting water pipes 200 connecting two adjacent PET probes 100. The 3in water inlet pipe is connected to the water inlet of the first PET probe 100 in the water-cooled probe group, and the 3out water outlet pipe is connected to the water outlet of the last PET probe 100 in the water-cooled probe group. The connecting water pipes 200 connect the water outlet of the previous PET probe 100 and the water inlet of the next PET probe 100. In this embodiment, the third water-cooled probe group connects the eight PET probes in series to form a cooling path; it is arranged in parallel with the other five water-cooled probe groups.

[0079] In this embodiment, the number of PET probes 100 in the water-cooled probe group at a lower height is greater than the number of PET probes 100 in the water-cooled probe group at a higher height (the number of PET probes in the second, third, and fourth water-cooled probe groups are 7, 8, and 9, respectively); the number of PET probes 100 in two water-cooled probe groups at the same or basically the same height is equal (for example, the number of PET probes in the first and second water-cooled probe groups at the same height is 7; the number of PET probes in the third and sixth water-cooled probe groups is 8; and the number of PET probes in the fourth and fifth water-cooled probe groups is 9).

[0080] When there are six or more water-cooled probe groups, the distribution area of ​​the PET probe 100 in any one water-cooled probe group does not exceed 1 / 4 of the circumference.

[0081] The number of PET probes 100 in the water-cooled probe group with the largest number of PET probes 100 shall not exceed twice the number of PET probes 100 in the water-cooled probe group with the smallest number of PET probes 100.

[0082] The PET detector module provided in this embodiment uses water cooling instead of traditional air cooling, providing a water cooling system solution. Since the water cooling system can increase the water flow rate by controlling the water pump, and water has a large specific heat capacity, it can remove a large amount of heat in a short time, and the cooling effect on the PET probe is better than the air cooling effect of the existing technology.

[0083] The PET detector module provided in this embodiment groups all PET probes, with the number of probes in each group related to the height of the probes. The number of PET probes decreases as the height increases, thereby reducing the difference in heat dissipation caused by height differences. Based on this, this embodiment achieves uniform water cooling of the probes, resulting in better cooling of the PET equipment. Furthermore, by reducing the difference in heat dissipation caused by probe height differences, the detector performance becomes more consistent, allowing them to operate stably in a uniform environment, thus ensuring the overall stability of the equipment performance.

[0084] Example 2

[0085] like Figures 2-6 As shown, this embodiment provides a water-cooled PET probe, including a photosensitive module 120, a light shield 110, a water-cooling module 150, a sub-plate 170, and an external plate 180. The photosensitive module 120 is placed in the light shield 110 and is shielded by the light shield 110. The water-cooling module 150 is disposed between the photosensitive module 120 and the sub-plate 170 and exchanges heat with the photosensitive module 120 and the sub-plate 170 respectively. The external plate 180 serves as the connecting carrier of the entire PET probe 100. The water-cooling module 150 is connected to the external plate 180 to fix the sub-plate 170, and the output port 172 of the sub-plate 170 passes through the external plate 180.

[0086] The light shield 110 protects the photosensitive module 120 and blocks visible light from entering, preventing external natural light from affecting the imaging process. However, it ensures that X-rays can pass through the light shield 110 (the X-ray signal here refers to the X-ray signal emitted by the radiation source, which is invisible; more precisely, it is the X-ray used to perform a three-dimensional scan of the human body. In reality, visible light can also affect the imaging process, so the light shield 110 is needed to cover the crystal 121 to prevent visible light from entering).

[0087] The present invention places the water-cooling module 150 between the photosensitive module 120 and the daughter board 170, so that the water-cooling module 150 can cool the photosensitive module 120 and the daughter board 170 at the same time.

[0088] The photosensitive module 120 is used to receive optical signals and convert them into electrical signals. After transmitting the electrical signals to the daughter board 170, the daughter board 170 collects the electrical signals and outputs the collected results through the output port 172.

[0089] The water-cooled PET probe provided by this invention adopts a stacked structure, which can maximize the space utilization of the probe and achieve a compact structure. In terms of heat dissipation, water cooling is used, eliminating the need to design space for air circulation, thereby enabling the miniaturization of PET probe products. Moreover, water cooling is more efficient than air cooling, which can significantly improve the heat dissipation effect and ensure the performance of the probe.

[0090] The PET probe 100 also includes a heat-conducting block 160, which is disposed between the sub-plate 170 and the water-cooling module 150 to transfer heat from the sub-plate 170 to the water-cooling module 150, thereby reducing the temperature of the sub-plate 170.

[0091] The photosensitive module 120 includes a crystal 121, a photoelectric conversion element 122, and a connector 123. The photoelectric conversion element 122 is located between the crystal 121 and the connector 123, connected to the rear end of the crystal 121. The connector 123 is connected to the middle of the photoelectric conversion element 122 and mates with the interface 171 on the daughter board 170. The crystal 121 is used to receive X-ray signals. The crystal 121 is coupled to the photoelectric conversion element 122 (such as a photomultiplier). The photomultiplier is used to perform preliminary processing on the optical signal transmitted from the crystal 121, converting it into an electrical signal. The photomultiplier includes, but is not limited to, SiPM, PMT, and other devices. The connector 123 is fixedly connected to the tail of the photomultiplier. This electrical signal is finally transmitted to the daughter board 170 through the connector 123 for further signal transmission. The electrical signal completes the main signal acquisition process on the daughter board 170 and is finally output through the output port 172, thus completing the conversion from optical signal to electrical signal and signal acquisition.

[0092] The connector 123 passes through the water-cooling cavity 151 of the water-cooling module 150, and a first plug channel 156 is provided in the water-cooling cavity 151 of the water-cooling module 150 to allow the connector 123 to pass through, so that the water-cooling cavity 151 is U-shaped; a water pipe 152 is connected to each end of the water-cooling cavity 151, one of the water pipes 152 is used for water inlet, water flows around the U-shaped water-cooling cavity of the water-cooling cavity 151 and then water outlet through the other water pipe 152; the water pipe 152 passes through the heat-conducting block 160, the daughter plate 170 and the external plate 180 to connect to the external pipeline (e.g., the connecting pipeline 200).

[0093] The water-cooled cavity 151 has an upper cover 153 at its upper end and a lower cover 154 at its lower end. The upper cover 153 and the lower cover 154 are respectively sealed to the water-cooled cavity 151, thereby sealing the water-cooled cavity 151. Two water pipes 152 are connected to the lower cover 154 and communicate with the inside of the water-cooled cavity 151.

[0094] A heat-conducting sheet 141 is also provided between the water-cooling module 150 and the photoelectric conversion element 122. The two sides of the heat-conducting sheet 141 are respectively attached to the water-cooling module 150 and the photoelectric conversion element 122. The heat-conducting sheet 141 can quickly conduct the heat generated by the crystal 121 and the photoelectric conversion element 122 to the water-cooling module 150. The heat is carried away by the water-cooling cycle of the water-cooling module 150, thereby achieving the purpose of cooling the photoelectric conversion element 122.

[0095] The PET probe 100 also includes a connector 130, which is provided in pairs. The connector 130 connects the light shield 110 and the water cooling module 150, and fixes the light shield 110 through the connector 130.

[0096] The connector 130 is sheet-shaped, with an inwardly protruding protrusion 131 at its lower end for connection to the light shield 110, and an inwardly bent connecting piece 132 at its upper end for connection to the water-cooling module 150. The connecting piece 132 is connected to the water-cooling module 150 by screws. The connecting structures of the connector 130 (protrusion 131 and connecting piece 132) are both arranged inside the sheet-shaped structure, so that the light shield 110 is fixedly connected to the water-cooling module 150 without increasing the overall structural size of the product axially or radially. This allows the overall structure to remain compact even after adding the water-cooling module 150. Considering that PET probes are arranged in an array, a compact structure is undoubtedly very important for PET probes. Furthermore, due to the structural design of the connecting piece 130, the clamping force of the light shield 110 on the crystal 121 can be adjusted by adjusting the tightening force of the screws on the connecting piece 132.

[0097] A slot 111 is provided on the side wall of the sunshade 110 to mate with the protrusion 131; the protrusion 131 can be connected inward in the slot 111, so that the connector 130 can be aligned with the external dimensions of the sunshade 110, ensuring a compact structure.

[0098] The water-cooled module 150 is provided with screw holes 155 that are connected to the connecting piece 132, and the screws connected in the screw holes 155 can pass through the heat-conducting block 160 and the sub-board 170 and then be connected to the external board 180.

[0099] The screw holes 155 are located at the four corners of the water-cooling module 150. Correspondingly, each connector 130 is provided with two connecting pieces 132.

[0100] A stepped structure 158 is provided at the position of the screw hole 155 on the water-cooled module 150 to accommodate the connecting piece 132 and the screw nut. The stepped structure 158 is located at the four corners of the water-cooled module 150, which facilitates the installation of screws and ensures the consistency of the external dimensions of the connecting piece 130, the light shield 110, and the water-cooled module 150.

[0101] Example 3

[0102] like Figures 7-10 As shown, this embodiment provides an active heat dissipation PET probe, including a photosensitive module 120, a water-cooling module 150, a daughter board 170, and an external board 180. The water-cooling module 150 is disposed between the photosensitive module 120 and the daughter board 170, and exchanges heat with the photosensitive module 120 and the daughter board 170 respectively. The external board 180 serves as the connection carrier for the entire PET probe 100. The water-cooling module 150 is connected to the external board 180 to fix the daughter board 170, and the output port 172 of the daughter board 170 passes through the external board 180.

[0103] In addition, the PET probe in this embodiment also includes a first thermoelectric cooler 142 and a second thermoelectric cooler 143. The first thermoelectric cooler 142 is disposed between the water-cooled module 150 and the photoelectric conversion element 122 of the photosensitive module 120, and its two side surfaces are respectively attached to the water-cooled module 150 and the photoelectric conversion element 122. The main function of the first thermoelectric cooler 142 is to dissipate heat from the photosensitive module 120. The second thermoelectric cooler 143 is disposed between the water-cooled module 150 and the sub-board 170, and its two side surfaces are respectively directly or indirectly attached to the water-cooled module 150 and the sub-board 170. The main function of the second thermoelectric cooler 143 is to dissipate heat from the sub-board 170.

[0104] This invention uses a semiconductor cooling device for active heat dissipation, which, when combined with a water-cooling module, significantly improves the heat dissipation efficiency of the PET probe.

[0105] Those skilled in the art will know that the purpose of improving heat exchange efficiency can also be achieved by using only one of the first semiconductor refrigeration chip 142 and the second semiconductor refrigeration chip 143.

[0106] Furthermore, the PET probe 100 may also include a heat-conducting block 160, which is disposed between the sub-plate 170 and the water-cooling module 150 for transferring heat from the sub-plate 170 to the water-cooling module 150. The second semiconductor cooling chip 143 is connected to the heat-conducting block 160, thereby enabling the heat from the sub-plate 170 to be transferred to the water-cooling module 150 more quickly.

[0107] At this time, the second semiconductor cooling chip 143 is embedded in the recessed surface of the heat-conducting block 160, which can not only further improve the heat conduction efficiency, but also ensure a compact structure.

[0108] The photosensitive module 120 includes a crystal 121, a photoelectric conversion element 122, and a connector 123. The photoelectric conversion element 122 is located between the crystal 121 and the connector 123, and is connected to the rear end of the crystal 121. The connector 123 is connected to the edge of the photoelectric conversion element 122 and mates with the interface 171 on the daughter board 170. The crystal 121 is used to receive X-ray signals. The crystal 121 is coupled to the photoelectric conversion element 122 (such as a photomultiplier). The photomultiplier is used to perform preliminary processing on the optical signal transmitted from the crystal 121, converting it into an electrical signal. The photomultiplier includes, but is not limited to, SiPM, PMT, and other devices. The connector 123 is fixedly connected to the tail of the photomultiplier. The electrical signal is finally transmitted to the daughter board 170 through the connector 123 for further signal transmission. The electrical signal is acquired on the daughter board 170 and finally output through the output port 172, thus completing the conversion from optical signal to electrical signal and signal acquisition.

[0109] The connector 123 passes through the side wall of the water-cooling module 150, and a second plug channel 157 is provided on the side wall of the water-cooling module 150 to allow the connector 123 to pass through. The water-cooling cavity of the water-cooling module 150 has an S-shaped or finger-shaped structure. A water guide pipe 152 is connected to each end of the water-cooling cavity. One water guide pipe 152 is used for water inlet, and water flows around the S-shaped or finger-shaped water-cooling cavity of the water-cooling cavity body 151 and then out through the other water guide pipe 152. The water guide pipe 152 passes through the heat-conducting block 160, the daughter plate 170 and the external plate 180 to connect with external pipelines (e.g., connecting pipeline 200). Correspondingly, the connector 123 is located at both ends of the photoelectric conversion element 122. By passing the connector 123 through the side wall of the water-cooled module 150, (compared to passing through the middle of the water-cooled module 150 in Embodiment 2) the contact area between the photoelectric conversion element 122, the heat-conducting block 160, etc., and the water-cooled module 150 can be larger, and the heat dissipation efficiency of the water-cooled module 150 is correspondingly better.

[0110] The water-cooled cavity 151 has an upper cover 153 at its upper end and a lower cover 154 at its lower end. The upper cover 153 and the lower cover 154 are respectively sealed to the water-cooled cavity 151, thereby sealing the water-cooled cavity of the water-cooled cavity 151. Two water pipes 152 are connected to the lower cover 154 and communicate with the water-cooled cavity inside the water-cooled cavity 151.

[0111] The PET probe provided in this embodiment also includes a light shield 110, in which the photosensitive module 120 is placed and shielded. The light shield 110 can protect the photosensitive module 120 and block the entry of visible light to prevent the influence of external natural light on imaging, while ensuring that X-rays can pass through the light shield 110 (the X-ray signal here refers to the X-ray signal emitted by the radiation source, which is invisible; more precisely, it is a three-dimensional scan of the human body using X-rays. In fact, visible light can also affect imaging, so the light shield 110 is needed to shield the crystal 121 to prevent visible light from entering).

[0112] The PET probe 100 also includes a connector 130, which is provided in pairs. The connector 130 connects the light shield 110 and the water cooling module 150, and fixes the light shield 110 through the connector 130.

[0113] The connector 130 is sheet-shaped, with an inwardly protruding protrusion 131 at its lower end for connection to the light shield 110, and an inwardly bent connecting piece 132 at its upper end for connection to the water-cooling module 150. The connecting piece 132 is connected to the water-cooling module 150 by screws. The connecting structures of the connector 130 (protrusion 131 and connecting piece 132) are both arranged inside the sheet-shaped structure, so that the light shield 110 is fixedly connected to the water-cooling module 150 without increasing the overall structural size of the product axially or radially. This allows the overall structure to remain compact even after adding the water-cooling module 150. Considering that PET probes are arranged in an array, a compact structure is undoubtedly very important for PET probes. Furthermore, due to the structural design of the connecting piece 130, the clamping force of the light shield 110 on the crystal 121 can be adjusted by adjusting the tightening force of the screws on the connecting piece 132.

[0114] A slot 111 is provided on the side wall of the sunshade 110 to mate with the protrusion 131; the protrusion 131 can be connected inward in the slot 111, so that the connector 130 can be aligned with the external dimensions of the sunshade 110, ensuring a compact structure.

[0115] The water-cooled module 150 is provided with screw holes 155 that are connected to the connecting piece 132, and the screws connected in the screw holes 155 can pass through the heat-conducting block 160 and the sub-board 170 and then be connected to the external board 180.

[0116] The screw holes 155 are located at the four corners of the water-cooling module 150. Correspondingly, each connector 130 is provided with two connecting pieces 132.

[0117] A stepped structure 158 is provided at the position of the screw hole 155 on the water-cooled module 150 to accommodate the connecting piece 132 and the screw nut. The stepped structure 158 is located at the four corners of the water-cooled module 150, which facilitates the installation of screws and ensures the consistency of the external dimensions of the connecting piece 130, the light shield 110, and the water-cooled module 150.

[0118] In addition, this application also provides a PET device, which includes a PET detector module or PET probe as described in any of the above embodiments. Through the technical solution described in this invention, the heat from each probe of the PET device can be effectively converted, resulting in a better cooling effect for the PET device than the air cooling effect of existing technologies. Furthermore, the embodiments of this application achieve uniform water cooling of the probes, resulting in a better cooling effect for the PET device. Simultaneously, by reducing the differences in heat dissipation caused by differences in detector height, the detector performance tends to be consistent, allowing for stable operation in a uniform environment, thereby stabilizing the overall performance of the device.

[0119] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A PET detector module, comprising a plurality of PET probes (100) arranged in a ring, characterized in that, Depending on the height of the center of gravity, several PET probes (100) are configured into at least two groups of water-cooled probes with different numbers of probes. The inlet and outlet water of different water-cooled probe groups are arranged in parallel. The PET probes (100) in each water-cooled probe group are connected in series. The number of PET probes (100) in the water-cooled probe group at the lower height is greater than the number of PET probes (100) in the water-cooled probe group at the higher height. As the height increases, the number of PET probes decreases.

2. The PET detector module according to claim 1, characterized in that, The different number of PET probes (100) in the water-cooled probe group means that the number of PET probes (100) in at least one water-cooled probe group is different from the number of PET probes (100) in other water-cooled probe groups.

3. The PET detector module according to claim 1, characterized in that, The number of water-cooled probe groups is even, and they are arranged symmetrically with respect to the vertical plane.

4. The PET detector module according to claim 1, characterized in that, Each water-cooled probe group includes an inlet pipe, an outlet pipe, and several connecting pipes (200) connecting two adjacent PET probes (100). The inlet pipe is connected to the inlet of the first PET probe (100) in the water-cooled probe group, the outlet pipe is connected to the outlet of the last PET probe (100) in the water-cooled probe group, and the connecting pipes (200) are connected to the outlet of the previous PET probe (100) and the inlet of the next PET probe (100).

5. The PET detector module according to claim 1, characterized in that, The number of PET probes (100) in two groups of water-cooled probes with the same or basically the same height is equal.

6. The PET detector module according to claim 1, characterized in that, When there are six or more groups of water-cooled probes, the distribution area of ​​any group of water-cooled probes (100) does not exceed one-quarter of the circumference enclosed by all the PET probes.

7. The PET detector module according to claim 1, characterized in that, The number of PET probes (100) in the water-cooled probe group with the largest number of PET probes (100) shall not exceed twice the number of PET probes (100) in the water-cooled probe group with the smallest number of PET probes (100).

8. The PET detector module according to claim 1, characterized in that, The PET probe (100) includes a photosensitive module (120), a water-cooling module (150), and a sub-plate (170). The water-cooling module (150) is disposed between the photosensitive module (120) and the sub-plate (170) and exchanges heat with the photosensitive module (120) and the sub-plate (170) respectively.

9. The PET detector module according to claim 8, characterized in that, The PET probe (100) also includes a heat-conducting block (160), which is disposed between the sub-plate (170) and the water-cooling module (150) for transferring heat from the sub-plate (170) to the water-cooling module (150).

10. The PET detector module according to claim 8, characterized in that, The PET probe (100) also includes a heat-conducting sheet (141), which is disposed between the photoelectric conversion element (122) of the photosensitive module (120) and the water-cooling module (150) to transfer heat from the photoelectric conversion element (122) to the water-cooling module (150).

11. The PET detector module according to any one of claims 8-10, characterized in that, The water-cooling module (150) includes a water-cooling cavity (151), which has a water-cooling chamber inside. A water pipe (152) is connected to each end of the water-cooling chamber to form a water flow path in the water-cooling chamber. The water pipe (152) is connected to an external pipeline.

12. The PET detector module according to claim 11, characterized in that, The water-cooling cavity is U-shaped, S-shaped, or finger-shaped.

13. The PET detector module according to claim 12, characterized in that, The photosensitive module (120) includes a crystal (121), a photoelectric conversion element (122), and a connector (123). The photoelectric conversion element (122) is located between the crystal (121) and the connector (123). The photoelectric conversion element (122) is connected to the rear end of the crystal (121). The connector (123) is connected to the middle or edge of the photoelectric conversion element (122). The connector (123) is mated with the interface (171) on the sub-board (170). When the connector (123) is connected to the middle of the photoelectric conversion element (122), the water-cooling cavity is U-shaped. The water-cooling cavity of the water-cooling module (150) is provided with a first plug channel (156). The connector (123) passes through the first plug channel (156) and connects to the sub-board (170). When the connector (123) is connected to both ends of the photoelectric conversion element (122), the water-cooling cavity is S-shaped or finger-shaped, and the connector (123) is disposed through the side wall of the water-cooling module (150).

14. The PET detector module according to claim 11, characterized in that, The water-cooled cavity (151) is connected to the upper cover (153) and the lower cover (154) to form a sealed water-cooled cavity.

15. The PET detector module according to claim 9 or 10, characterized in that, A first semiconductor refrigeration chip (142) is provided between the water-cooling module (150) and the photoelectric conversion element (122) of the photosensitive module (120). The two side surfaces of the first semiconductor refrigeration chip (142) are respectively attached to the water-cooling module (150) and the photoelectric conversion element (122). And / or, a second semiconductor cooling chip (143) is provided between the water-cooling module (150) and the sub-board (170), and the two side surfaces of the second semiconductor cooling chip (143) are respectively attached to the water-cooling module (150) and the sub-board (170).

16. The PET detector module according to claim 8, characterized in that, The PET probe also includes a light shield (110), in which the photosensitive module (120) is placed and shielded by the light shield (110).

17. The PET detector module according to claim 16, characterized in that, The PET probe (100) also includes a connector (130), which is arranged in pairs and connects the light shield (110) and the water cooling module (150).

18. The PET detector module according to claim 17, characterized in that, The connector (130) is sheet-shaped, with an inwardly protruding protrusion (131) at the lower end to connect with the light shield (110), and an inwardly bent connecting piece (132) at the upper end to connect with the water-cooling module (150).

19. The PET detector module according to claim 18, characterized in that, The side wall of the light shield (110) is provided with a bayonet (111) that mates with the protrusion (131); the water cooling module (150) is provided with a screw hole (155) that connects to the connecting piece (132), and the screw connected in the screw hole (155) can pass through the heat-conducting block (160) and the sub-plate (170) and then be fixed.

20. The PET detector module according to claim 19, characterized in that, The screw holes (155) are located at the four corners of the water-cooling module (150), and correspondingly, each connector (130) is provided with two connecting pieces (132).

21. The PET detector module according to claim 20, characterized in that, A stepped structure (158) is provided at the location of the screw hole (155) on the water-cooled module (150) to accommodate the connecting piece (132) and the screw nut.

22. The PET detector module according to claim 8, characterized in that, The PET probe also includes an external plate (180), the sub-plate (170) is fixed between the water-cooling module (150) and the external plate (180), and the water-cooling module (150) is fixed between the photosensitive module (120) and the sub-plate (170).

23. A PET device, characterized in that, The PET device includes the PET detector module as described in any one of claims 1-22.

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