Detector and computed tomography equipment

Abstract

The invention provides a detector and computed tomography equipment, the computed tomography equipment comprises a rack, a computer, a radiation source and a detector, the radiation source and the detector are respectively mounted on the rack, the radiation source is used for emitting X-rays to the detector, and the detector is used for receiving the X-rays, processing the X-rays and feeding the X-rays back to the computer. The detector comprises a support and a plurality of detection units. The detection unit comprises a detector substrate, a positioning block and a plurality of photosensitive elements; the photosensitive elements are respectively welded on the front surface of the detector substrate, and the positioning block is fixed on the back surface of the detector substrate; the peripheral side walls of the positioning blocks are all located within the range of the peripheral side walls of the detector substrate, the sides, away from the detector substrate, of the positioning blocks are provided with first positioning parts, the support is provided with second positioning parts, and the first positioning parts and the second positioning parts are in positioning fit. According to the invention, accurate positioning of the detection units can be ensured, and the splicing expansion requirements of the detection units in the X-axis direction and the Z-axis direction can be met.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on December 12, 2024, with application number 202423076137.3 and utility model name “Detector and Computed Tomography Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of medical devices, and more specifically, to a detector and a computer tomography device. Background Art

[0003] Computed Tomography (CT) technology uses X-ray beams to scan a layer of a certain thickness in a certain part of the human body. The detector receives the X-rays that pass through the layer, converts them into visible light, and then converts them into electrical signals through photoelectric conversion. Then, they are converted into digital signals through an analog / digital converter. After being reconstructed by a computer, a cross-sectional or three-dimensional image of the examined part of the human body is generated, thereby discovering potential small lesions in the body.

[0004] The detector is one of the core components of the computed tomography equipment. The detector generally includes a bracket and a detection unit. In order to achieve precise positioning of the detection unit on the bracket, a pin hole alignment structure is generally set on the Z-axis edge of the detector substrate. However, the above structural design limits the splicing and expansion of the detection unit along the Z-axis direction. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a detector and a computer tomography device to solve the technical problem in the prior art that the pin hole alignment structure on the detector substrate limits the expansion of the detection unit along the Z-axis direction.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a detector is provided, including a bracket and a plurality of detection units; the detection unit includes a detector substrate, a positioning block and a photosensitive element; each of the photosensitive elements is respectively welded to the front side of the detector substrate, and the positioning block is fixed to the back side of the detector substrate; the peripheral side walls of the positioning blocks are all located within the range of the peripheral side walls of the detector substrate, the positioning block has a first positioning portion on the side facing away from the detector substrate, the bracket has a second positioning portion, and the first positioning portion and the second positioning portion form a positioning fit.

[0007] In some embodiments, the first positioning portion is a positioning hole, and the second positioning portion is a positioning column;

[0008] Alternatively, the first positioning portion is a positioning column, and the second positioning portion is a positioning hole.

[0009] In some embodiments, the positioning block is made of heat-conductive material.

[0010] In some embodiments, the bracket is installed with a data acquisition board, and the detection unit also includes a flexible circuit board, the first end of the flexible circuit board is connected to the back side of the detector substrate, and the second end of the flexible circuit board is connected to the data acquisition board to form a communication connection between the detector substrate and the data acquisition board.

[0011] In some embodiments, the first end of the flexible circuit board is welded to the back side of the detector substrate;

[0012] Alternatively, a first connector is provided on the back side of the detector substrate, and the first end of the flexible circuit board is connected to the first connector.

[0013] In some embodiments, the second end of the flexible circuit board is welded to the data acquisition board;

[0014] Alternatively, the data acquisition board is provided with a second connector, and the second end of the flexible circuit board is connected to the second connector.

[0015] In some embodiments, the detection unit includes two flexible circuit boards respectively disposed on the back side of the detector substrate, and the two flexible circuit boards are located on opposite sides of the positioning block along the X-axis direction of the detector.

[0016] In some embodiments, the positioning block includes two mounting portions relatively arranged along the Z-axis direction of the detector and a connecting portion connecting the two mounting portions, and the connecting portion is respectively enclosed with the two mounting portions on opposite sides along the X-axis direction of the detector to form two accommodating grooves, and the first ends of the two flexible circuit boards are respectively connected to the detector substrate in the two accommodating grooves.

[0017] In some embodiments, the flexible circuit board includes a main body and a fitting portion, the first end is the end of the fitting portion away from the connecting portion, and the second end is the end of the main body away from the fitting portion; the fitting portion is installed in the accommodating groove, and the main body extends from the side of the fitting portion away from the center plane of the positioning block along the X-axis direction vertically in the direction away from the detector substrate to the data acquisition board.

[0018] In some embodiments, the detector substrate is an organic printed circuit board.

[0019] In some embodiments, the photosensitive element includes a light-emitting diode and an analog-to-digital conversion module electrically connected to the light-emitting diode. The analog-to-digital conversion module is electrically connected to the detector substrate, and is configured to convert an analog signal output after the light-emitting diode receives light into a digital signal for transmission to the detector substrate.

[0020] On the other hand, the present application also provides a computed tomography device, including a gantry, a computer, a radiation source, and the above-mentioned detector. The radiation source and the detector are respectively installed on the gantry and are arranged opposite to each other. The radiation source is configured to emit X-rays to the detector, and the detector is configured to receive the X-rays, process the light, and then feedback it to the computer.

[0021] The beneficial effects of the detector and the computed tomography device provided by the present application are as follows: By providing a positioning block on the back surface of the detector substrate, and respectively providing a first positioning portion and a second positioning portion on the positioning block and the bracket, the positioning of the detection unit and the bracket is achieved through the positioning cooperation between the first positioning portion and the second positioning portion, ensuring the precise positioning of the detection unit. At the same time, since the positioning block is provided on the back surface of the detector substrate, and the peripheral side walls of the positioning block are all within the range of the peripheral side walls of the detector substrate, the setting of the positioning block does not affect the splicing and expansion of the detector substrate in the Z-axis direction and the X-axis direction, that is, the structural design of the detection unit meets the splicing and expansion requirements in the X-axis direction and the Z-axis direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the detector provided by the embodiment of the present application;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the detection unit in the detector provided by the embodiment of the present application;

[0025] Figure 3 It is a front structural schematic diagram of the detection unit in the detector provided by the embodiment of the present application;

[0026] Figure 4 It is a structural schematic diagram of the back surface of the detection unit in the detector provided by the embodiment of the present application after removing the positioning block;

[0027] Figure 5Schematic diagram of the photosensitive element and the detector substrate in the detector provided by the embodiment of the present application.

[0028] Among them, the reference numerals in the figure are as follows:

[0029] 100, detection unit; 110, detector substrate; 120, photosensitive element; 121, light-emitting diode; 122, analog-to-digital conversion module; 130, positioning block; 131, mounting portion; 132, connecting portion; 133, accommodating groove; 134, positioning hole; 140, flexible circuit board; 141, first end; 142, second end; 143, main body portion; 144, fitting portion; 200, bracket; 300, data acquisition board; 400, second connector. Detailed implementation manners

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0034] The detector in the computed tomography equipment has a spatial resolution within the range of 0.5 mm - 0.6 mm at the international standardization center. Thus, the physical pixel size of the photosensitive device (usually a light-emitting diode) that constitutes the detector is within the range of 1 mm - 1.2 mm. To improve the spatial resolution, it is necessary to reduce the physical pixel size of the photosensitive device of the detector, such as reducing it to 0.5 mm - 0.6 mm, which significantly increases the number of channels of the detection unit. The detection unit needs to meet the requirement of two-dimensional expansion. However, as described in the background art, in order to achieve precise positioning of the detection unit, pin holes need to be set at both ends of the detection unit in the Z-axis direction. When the detection units are spliced and expanded in the Z-axis direction, the gap between adjacent detection units is too large, affecting the detection accuracy of the detector. Conversely, it also limits the expansion of the detection unit in the Z-axis direction.

[0035] It should be noted that for the sake of convenience in description, in this application, the length direction of the computed tomography equipment corresponding to the human body is referred to as the Z-axis direction of the detector (abbreviated as the Z-axis direction), and the scanning circumferential direction of the computed tomography equipment is referred to as the X-axis direction of the detector (abbreviated as the X-axis direction). In addition, the distribution direction of the detector and the radiation source is referred to as the Y-axis direction of the detector (abbreviated as the Y-axis direction), which is also the height direction of the detector. Specifically, it is the distribution direction of the front and back of the detector substrate 110.

[0036] To solve the above problems, the embodiment of this application provides a detector and a computed tomography equipment. By setting a positioning block 130 on the back surface of the detector substrate 110, a positioning fit is formed between the positioning block 130 and the bracket 200. It can not only achieve precise positioning of the detection unit 100, but also make the spliced detection units 100 fit closely, meeting the expansion requirements of the detection unit 100 along the Z-axis direction and the X-axis direction.

[0037] Please refer to Figure 1 and Figure 2 , and now a detailed description of the detector provided by the embodiment of this application will be given. This detector is used to receive X-rays. After converting the X-rays into visible light, it is converted into an electrical signal by photoelectric conversion, and then converted into a digital signal by an analog / digital converter, and finally the digital signal is transmitted to the computer of the computed tomography equipment.

[0038] The detector includes a bracket 200 and a plurality of detection units 100; the detection unit 100 includes a detector substrate 110, a positioning block 130, and a plurality of photosensitive elements 120; each photosensitive element 120 is respectively welded to the front surface of the detector substrate 110, and the positioning block 130 is fixed to the back surface of the detector substrate 110; the peripheral side walls of the positioning block 130 are all within the range of the peripheral side walls of the detector substrate 110, and one side of the positioning block 130 facing away from the detector substrate 110 has a first positioning portion, and the bracket 200 has a second positioning portion, and the first positioning portion and the second positioning portion form a positioning fit.

[0039] Among them, the bracket 200 is mainly used to support and install the detection unit 100, and to install the detector on the rack of the computed tomography equipment. The plurality of detection units 100 are sequentially installed on the bracket 200 along the Z-axis direction, and each detection unit 100 is closely attached to each other along the Z-axis direction in sequence.

[0040] It should be noted that the peripheral side walls of the positioning block 130 being all within the range of the peripheral side walls of the detector substrate 110 specifically means that, along the Y-axis direction, the projections of the peripheral side walls of the positioning block 130 are all within the range of the projections of the peripheral side walls of the detector substrate 110, and the peripheral side walls of the positioning block 130 along the X-axis direction and the peripheral side walls along the Z-axis direction will not extend outside the corresponding peripheral side walls of the detector substrate 110. Therefore, the existence of the positioning block 130 will not affect the splicing and expansion of the detector substrate 110 along the X-axis direction and the Z-axis direction.

[0041] In addition, it should be noted that the first positioning portion and the second positioning portion form a positioning fit, which can be a plug-in fit or a surface-to-surface abutting fit.

[0042] The detector provided by the embodiment of the present application realizes the positioning of the detection unit 100 and the bracket 200 through the positioning fit between the first positioning portion and the second positioning portion by arranging the positioning block 130 on the back surface of the detector substrate 110 and respectively arranging the first positioning portion and the second positioning portion on the positioning block 130 and the bracket 200, ensuring the accurate positioning of the detection unit 100. At the same time, since the positioning block 130 is arranged on the back surface of the detector substrate 110 and the peripheral side walls of the positioning block 130 are all within the range of the peripheral side walls of the detector substrate 110, the setting of the positioning block 130 will not affect the splicing and expansion of the detector substrate 110 along the Z-axis direction and the X-axis direction, that is, the structural design of the detection unit 100 meets the splicing and expansion requirements along the X-axis direction and the Z-axis direction.

[0043] In some embodiments, please refer to Figure 5, the photosensitive element 120 includes a light-emitting diode 121 and an analog-to-digital conversion module 122 electrically connected to the light-emitting diode 121. The analog-to-digital conversion module 122 is electrically connected to the detector substrate 110, and the analog-to-digital conversion module 122 is configured to convert the analog signal output after the light-emitting diode 121 receives light into a digital signal for transmission to the detector substrate 110.

[0044] Specifically, when the light-emitting diode 121 receives X-rays, it sends an analog signal to the analog-to-digital conversion module 122. The analog-to-digital conversion module 122 converts the analog signal into a digital signal and transmits it to the detector substrate 110, so that the signal output by the detector substrate 110 to the data acquisition board 300 is directly a digital signal, without the need to lead out a circuit at a position close to the light-emitting diode 121 as in the prior art. Specifically, it is not necessary to lead out a circuit on the back of the detector substrate 110 to connect an additional analog-to-digital conversion device, thereby reducing the design difficulty and design cost.

[0045] Specifically, the light-emitting diode 121 and the analog-to-digital conversion module 122 are integrated into one body. Specifically, they can be encapsulated into one body through packaging technology, that is, the light-emitting diode 121 and the analog-to-digital conversion module 122 can be made into a module, which is not only convenient for handling and assembly, but also beneficial for the manufacturer to design and use such photosensitive elements 120.

[0046] In some embodiments, please refer to Figure 2 , the first positioning portion is a positioning hole 134, the second positioning portion is a positioning post, and the positioning hole 134 is in plug-in fit with the positioning post. Among them, since both the positioning hole 134 and the positioning post are rotary structures and have the advantage of central positioning, the precise positioning of the detection unit 100 and the bracket 200 can be achieved. In addition, the positioning hole 134 is formed in the positioning block 130, so that the structure of the detection unit 100 can be simple and the surface can be neat. It can be understood that in other embodiments of the present application, the first positioning portion can also be set as a positioning post, and the second positioning portion can be set as the positioning hole 134, which can also achieve the precise positioning of the detection unit 100 and the bracket 200. In addition, the first positioning portion and the second positioning portion can be set as a slot and a plug respectively, or the first positioning portion and the second positioning portion can be set as two abutting positioning structures, which is not uniquely limited here.

[0047] Optionally, please refer to Figure 2, there are three positioning holes 134 formed on the positioning block 130. The positioning holes 134 are arranged at equal intervals in the Z-axis direction in sequence. The center lines of the positioning holes 134 are all located on the central plane of the positioning block 130 in the X-axis direction, and the positioning holes 134 are symmetrically arranged relative to the central plane of the positioning block 130 in the Z-axis direction. The above settings can ensure the positioning accuracy of the positioning block 130 and the bracket 200, and further ensure the positioning accuracy of the detection unit 100 and the bracket 200. It can be understood that in other embodiments of the present application, the number of the positioning holes 134 can also be one, two, four or more than four, and there is no unique limitation here.

[0048] In some embodiments, the positioning block 130 is made of a heat-conducting material. The above settings enable the positioning block 130 to not only have a positioning function but also a heat dissipation function. The heat generated by the detector substrate 110 and the photosensitive element 120 is transferred to the bracket 200 through the positioning block 130, and is dissipated outward through the bracket 200, so as to ensure the rapid heat dissipation of the detection unit, so that even if the number of channels of the detection unit 100 increases, its service life will not be affected and no large noise will be generated.

[0049] Optionally, the positioning block 130 is made of a material with high heat conduction efficiency such as aluminum, copper or silver.

[0050] Optionally, the positioning block 130 is fixed to the back surface of the detector substrate 110 by welding. In other embodiments, the positioning block 130 can also be bonded to the back surface of the detector substrate 110 by a heat-conducting adhesive.

[0051] In some embodiments, the bracket 200 is made of a heat-dissipating material, and heat sinks are provided on the bracket 200, so that it is convenient to quickly conduct the heat generated by the detection unit 100. Of course, in other embodiments, a radiator such as a fan can also be provided to assist the bracket 200 in heat dissipation, and there is no unique limitation here.

[0052] In some embodiments, please refer to Figure 1, the bracket 200 is installed with a data acquisition board 300, and the detection unit 100 also includes a flexible circuit board 140, the first end 141 of the flexible circuit board 140 is connected to the back of the detector substrate 110, and the second end 142 of the flexible circuit board 140 is connected to the data acquisition board 300 to form a communication connection between the detector substrate 110 and the data acquisition board 300. In this embodiment, the communication connection between the detection unit 100 and the data acquisition board 300 is realized through the flexible circuit board 140, which can reduce the cost of the entire detector; at the same time, the data of the detection unit 100 is directly transmitted to the data acquisition board 300 through the flexible circuit board 140 directly connected to the data acquisition board 300, and then the data is processed by the data acquisition board 300 and then sent to the computer, without binding the combination board at the second end 142 of the flexible circuit board 140, processing the data through the combination board, and then communicating with the data acquisition board 300 through the combination board, thereby reducing the combination board and electronic devices, and reducing the cost of the detection unit 100.

[0053] In some embodiments, see Figure 2 and Figure 4 , the first end 141 of the flexible circuit board 140 is welded to the back of the detector substrate 110. Specifically, circular pads of the same size are firstly provided on the back of the detector substrate 110 and the first end 141 of the flexible circuit board 140, and solder balls of a certain size are firstly welded to the circular pads on the back of the detector substrate 110, and then the detector substrate 110 as a whole is welded to the circular pads corresponding to the first end 141 of the flexible circuit board 140 as a component. The above design not only simplifies the connection process between the flexible circuit board 140 and the detector substrate 110, but also reduces the cost of other components.

[0054] For details, please refer to Figure 2 and Figure 4 , the first end 141 of the flexible circuit board 140 can be welded to the back of the detector substrate 110, and then bent vertically downward to extend the second end 142 of the flexible circuit board 140 to the data acquisition board 300. Specifically, the flexible circuit board 140 includes a main body 143 and a bonding portion 144, the first end 141 is located at the bonding portion 144, the bonding portion 144 is bonded to the back of the detector substrate 110, and the main body 143 extends vertically away from the detector substrate 110 from the side of the bonding portion 144 away from the central plane of the positioning block 130 along the X-axis direction until it is connected to the data acquisition board 300.

[0055] Optionally, the fitting portion 144 may be in a square, strip or polygonal shape. Optionally, the main body portion 143 may be in a strip or polygonal shape.

[0056] Optionally, the flexible circuit board 140 may be made by wrapping a copper circuit with a polyimide, polyester or polyether film.

[0057] In some embodiments, the second end 142 of the flexible circuit board 140 is soldered to the data acquisition board 300. Specifically, circular pads with the same size are first provided on both the data acquisition board 300 and the second end 142 of the flexible circuit board 140. First, solder balls of a certain size are soldered to the circular pads of the data acquisition board 300, and then the data acquisition board 300 as a whole is used as a component to be soldered to the corresponding circular pads of the flexible circuit board 140. The above design not only simplifies the connection process between the flexible circuit board 140 and the data acquisition board 300, but also reduces the cost of other components.

[0058] In some embodiments, please refer to Figure 1 、 Figure 2 and Figure 4 , the detection unit 100 includes two flexible circuit boards 140. The two flexible circuit boards 140 are respectively disposed on the back surface of the detector substrate 110, and the two flexible circuit boards 140 are located on opposite sides of the positioning block 130 along the X-axis direction of the detector. Among them, in order to improve the spatial resolution of the detection unit 100, it is necessary to increase the distribution density of the photosensitive elements 120 of the detection unit 100, so the number of data channels of the detection unit 100 will increase. In order to avoid the situation that a single flexible circuit board 140 needs to transmit a large amount of data, resulting in an excessive width of the flexible circuit board 140 and a large amount of heat generation of the flexible circuit board 140, in this embodiment, the data of the detector substrate 110 is transmitted by two flexible circuit boards 140 respectively, which can reduce the heat dissipation of the flexible circuit board 140 and reduce the width of the flexible circuit board 140, which is beneficial to the structural layout on the back surface of the detection unit 100.

[0059] In some embodiments, please refer to Figure 2 , the positioning block 130 includes two mounting portions 131 oppositely arranged along the Z-axis direction of the detector and a connecting portion 132 connecting the two mounting portions 131. Opposite sides of the connecting portion 132 along the X-axis direction of the detector respectively enclose two accommodating grooves 133 with the two mounting portions 131, and the first ends 141 of the two flexible circuit boards 140 are respectively connected to the detector substrate 110 in the two accommodating grooves 133. The above design makes the layout of the positioning block 130 and the flexible circuit board 140 compact on the back surface of the detector substrate 110, does not affect the expansion and splicing of the detector substrate 110, and at the same time makes the fitting area between the positioning block 130 and the detector substrate 110 large enough to ensure the heat dissipation effect.

[0060] Specifically, please refer to Figure 2 , the two mounting portions 131 and the connecting portion 132 are connected in an "I" shape, and the two accommodating grooves 133 both penetrate through the two sides of the positioning block 130 along the X-axis direction, so as to facilitate the flexible circuit board 140 to pass through the accommodating groove 133.

[0061] Optionally, in the X-axis direction, the center lines of the two mounting portions 131 and the connecting portion 132 coincide, and the three positioning holes 134 are respectively provided on the two mounting portions 131 and the connecting portion 132. The two mounting portions 131 are symmetrically arranged along the Z-axis direction with respect to the positioning block 130.

[0062] Optionally, the detector substrate 110 is a cuboid block structure, and the four peripheral side walls of the positioning block 130 are all within the four peripheral side walls of the detector substrate 110. Specifically, the dimension of the positioning block 130 in the X-axis direction is smaller than the dimension of the detector substrate 110 in the X-axis direction, and the dimension of the positioning block 130 in the Z-axis direction is smaller than the dimension of the detector substrate 110 in the Z-axis direction. The above design ensures that even if there are design or manufacturing errors, the peripheral side walls of the positioning block 130 will not extend beyond the peripheral side walls of the detector substrate 110. Of course, in other embodiments, when the design accuracy is very precise, the opposite sides of the positioning block 130 in the X-axis direction can be flush with the opposite sides of the detector substrate 110 in the X-axis direction, and at the same time, the opposite sides of the positioning block 130 in the Z-axis direction can be flush with the opposite sides of the detector substrate 110 in the Z-axis direction.

[0063] Optionally, in the X-axis direction, the central plane of the positioning block 130 coincides with the central plane of the detector substrate 110; in the Z-axis direction, the central plane of the positioning block 130 coincides with the central plane of the detector substrate 110.

[0064] Optionally, the bonding portions of the two flexible circuit boards 140 are respectively installed in the accommodating grooves 133.

[0065] In some embodiments, please refer to Figure 1 , in the X-axis direction, data acquisition boards 300 are installed on both opposite sides of the bracket 200. The detector substrate 110 is installed on the top side of the bracket 200 through the positioning block 130. The two flexible circuit boards 140 respectively extend vertically to the two data acquisition boards 300 and are respectively connected to the two data acquisition boards 300.

[0066] In some embodiments, the detector substrate 110 is an organic printed circuit board. Specifically, copper foil is etched to form copper wires, and then the copper wires are wrapped with an organic resin polyimide to form the detector substrate 110. In this embodiment, the ceramic substrate is replaced by an organic printed circuit board with lower cost, thereby reducing the cost of the detector. It can be understood that in other embodiments of the present application, the above detector substrate 110 can also be a ceramic substrate, which is not limited uniquely here.

[0067] In some other embodiments of the present application, the first end 141 of the flexible circuit board 140 and the detector substrate 110 may also be connected through a first connector. Specifically, a first connector is provided on the back of the detector substrate 110, and the first end 141 of the flexible circuit board 140 is connected to the first connector. Among them, the first connector may be an FPC connector, that is, the gold fingers at the first end 141 of the flexible circuit board 140 are inserted into the first connector to form an electrical connection between the first end 141 of the flexible circuit board 140 and the detector substrate 110; alternatively, the first connector may also be a board-to-board connector. In this case, board-to-board connectors need to be provided on the back of the detector substrate 110 and the first end 141 of the flexible circuit board 140 respectively, and then the two board-to-board connectors are plugged in opposite to each other to form an electrical connection between the first end 141 of the flexible circuit board 140 and the detector substrate 110.

[0068] In some other embodiments of the present application, the second end 142 of the flexible circuit board 140 and the data acquisition board 300 may also be connected through a second connector 400. Specifically, a second connector 400 is provided on the data acquisition board 300, and the second end 142 of the flexible circuit board 140 is connected to the second connector 400. Among them, the second connector 400 may be an FPC connector, that is, the gold fingers at the second end 142 of the flexible circuit board 140 are inserted into the second connector 400 to form an electrical connection between the second end 142 of the flexible circuit board 140 and the data acquisition board 300; alternatively, the second connector 400 may also be a board-to-board connector. In this case, board-to-board connectors need to be provided on the data acquisition board 300 and the second end 142 of the flexible circuit board 140 respectively, and then the two board-to-board connectors are plugged in opposite to each other to form an electrical connection between the second end 142 of the flexible circuit board 140 and the data acquisition board 300.

[0069] On the other hand, the present application also provides a computed tomography device, including a frame, a computer, a radiation source, and a detector. The radiation source and the detector are respectively installed on the frame and are arranged opposite to each other. The radiation source is used to emit X-rays to the detector, and the detector is used to receive the X-rays passing through the human body. After the detector processes the X-rays, it feeds them back to the computer. Specifically, after the detector converts the X-rays into visible light, it converts the photoelectric conversion into an electrical signal, and then converts it into a digital signal through an analog / digital converter. After being reconstructed by the computer, a cross-sectional or three-dimensional image of the examined part of the human body is generated, so as to discover potential small lesions in the body.

[0070] In the computed tomography device according to the embodiments of the present application, through the above-mentioned setting of the detector, the detection resolution of the computed tomography device is higher, the positioning of its detection unit is accurate, and the splicing and expansion requirements in the X-axis direction and the Z-axis direction are met.

[0071] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A detector, characterized in that, It includes a bracket (200) and a plurality of detection units (100); each detection unit (100) includes a detector substrate (110), a positioning block (130) and a plurality of photosensitive elements (120). Each photosensitive element (120) is respectively welded to the front surface of the detector substrate (110), and the positioning block (130) is fixed to the back surface of the detector substrate (110); the peripheral side walls of the positioning block (130) are all within the range of the peripheral side walls of the detector substrate (110). One side of the positioning block (130) facing away from the detector substrate (110) has a first positioning portion, and the bracket (200) has a second positioning portion, and the first positioning portion and the second positioning portion form a positioning fit.

2. The detector according to claim 1, characterized in that, The first positioning portion is a positioning hole (134), and the second positioning portion is a positioning post; Or, the first positioning portion is a positioning post, and the second positioning portion is a positioning hole (134).

3. The detector according to claim 1, characterized in that, The positioning block (130) is made of a heat-conducting material; And / or, the detector substrate (110) is an organic printed circuit board.

4. The detector according to any one of claims 1 to 3, characterized in that, The bracket (200) is installed with a data acquisition board (300). The detection unit (100) further includes a flexible circuit board (140). The first end (141) of the flexible circuit board (140) is connected to the back surface of the detector substrate (110), and the second end (142) of the flexible circuit board (140) is connected to the data acquisition board (300) to form a communication connection between the detector substrate (110) and the data acquisition board (300).

5. The detector according to claim 4, characterized in that, The first end (141) of the flexible circuit board (140) is welded to the back surface of the detector substrate (110); or, a first connector is provided on the back surface of the detector substrate (110), and the first end (141) of the flexible circuit board (140) is connected to the first connector; The second end (142) of the flexible circuit board (140) is welded to the data acquisition board (300); or, a second connector (400) is provided on the data acquisition board (300), and the second end (142) of the flexible circuit board (140) is connected to the second connector (400).

6. The detector according to claim 4, characterized in that The detection unit (100) includes two flexible circuit boards (140) respectively provided on the back surface of the detector substrate (110), and the two flexible circuit boards (140) are located on opposite sides of the positioning block (130) along the X-axis direction of the detector.

7. The detector according to claim 6, characterized in that, The positioning block (130) includes two mounting portions (131) oppositely arranged along the Z-axis direction of the detector and a connecting portion (132) connecting the two mounting portions (131). Opposite sides of the connecting portion (132) along the X-axis direction of the detector respectively enclose two accommodating grooves (133) with the two mounting portions (131), and the first ends (141) of the two flexible circuit boards (140) are respectively connected to the detector substrate (110) in the two accommodating grooves (133).

8. The detector according to claim 7, characterized in that, The flexible circuit board (140) comprises a main body (143) and a fitting portion (144), wherein the first end (141) is the end of the fitting portion (144) away from the connecting portion (143), and the second end (142) is the end of the main body (143) away from the fitting portion (144); the fitting portion (144) is installed in the receiving groove (133), and the main body (143) extends from the side of the fitting portion (144) away from the central plane of the positioning block (130) along the X-axis direction vertically in a direction away from the detector substrate (110) to the data acquisition board (300).

9. The detector according to any one of claims 1 to 3, characterized in that, The photosensitive element (120) comprises a light emitting diode (121) and an analog-to-digital conversion module (122) electrically connected to the light emitting diode (121); the analog-to-digital conversion module (122) is electrically connected to the detector substrate (100); the analog-to-digital conversion module (122) is used to convert an analog signal output by the light emitting diode (121) after receiving light into a digital signal for transmission to the detector substrate (100).

10. A computed tomography device, characterized in that, It comprises a frame, a computer, a radiation source and the detector according to any one of claims 1 to 9, wherein the radiation source and the detector are respectively mounted on the frame and arranged opposite to each other, the radiation source is used to emit X-rays to the detector, and the detector is used to receive the X-rays and feed back the processed light to the computer.

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