Radiation detection system and radiation detection apparatus

Abstract

A radiation detection system (700), comprising a first ray scanning device (106) and a second ray scanning device (107). The first ray scanning device (106) comprises a first target point (1061), which emits rays for scanning a first area (1081) of an object (108). The second ray scanning device (107) comprises a second target point (1071), wherein the second target point (1071) is closer to the ground (701) than the first target point (1061), and the second target point (1071) emits rays for scanning a second area (1082) of the object (108), at least part of the second area (1082) being located out of the first area (1081), and at least part of the second area (1082) being located below the first area (1081) in a vertical direction. Further provided is a radiation detection apparatus (800), comprising a bearing device, which comprises a door-type structure which defines a detection channel (802), wherein the radiation detection system (700) is mounted on the bearing device and performs scanning on a stationary or moving object (108) in the detection channel (802).

Description

Radiation detection systems and radiation detection devices

[0001] This application claims priority to Chinese patent application No. 202311841468.9 filed on December 28, 2023, the contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of radiation detection, security inspection or other fields, and more particularly, to a radiation detection system and a radiation detection device. Background Art

[0003] Radiation imaging technology can be used to scan the object under inspection in a non-contact manner with the help of the penetrating ability of specific rays, and the different attenuation intensities of specific rays by different materials can be used to obtain a perspective image of the object under inspection.

[0004] In the related art, when a side view inspection system scans an object, it is necessary to ensure that the inspection system and the inspected object are within a certain distance range to ensure a certain radiation intensity. Therefore, there will be a considerable area under the inspected object that cannot be scanned by the side view inspection system, resulting in a scanning blind spot and the inability to fully scan the target area on the inspected object. Missed detection may occur, resulting in unsatisfactory scanning results. Summary of the Invention

[0005] The present disclosure provides a radiation detection system and a radiation detection device.

[0006] One aspect of an embodiment of the present disclosure provides a radiation detection system, comprising: a first ray scanning device, comprising a first target point, the first target point emitting rays for scanning a first area of ​​an object; a second ray scanning device, comprising a second target point, the second target point being closer to the ground than the first target point, the rays emitted by the second target point being used to scan a second area of ​​the object; wherein at least a portion of the second area is located outside the first area, and the at least portion of the area is located below the first area in a vertical direction.

[0007] According to an embodiment of the present disclosure, the first ray scanning device includes an X-ray accelerator, and the second ray scanning device includes an X-ray light machine.

[0008] According to an embodiment of the present disclosure, the first ray scanning device further includes a first detector configured to receive rays emitted by the first target point; and the second ray scanning device further includes a second detector configured to receive rays emitted by the second target point.

[0009] According to an embodiment of the present disclosure, it further includes: a third detector configured to receive rays emitted by the first target point and the second target point.

[0010] According to an embodiment of the present disclosure, both the first target point and the second target point emit radiation in a pulsed beam manner, and when one of them emits radiation within a scanning cycle, the other does not emit radiation.

[0011] According to an embodiment of the present disclosure, the second target point is closer to the object than the first target point.

[0012] According to an embodiment of the present disclosure, the second ray scanning device is placed between the first ray scanning device and the object.

[0013] According to an embodiment of the present disclosure, the second ray scanning device is placed obliquely below the first ray scanning device.

[0014] According to an embodiment of the present disclosure, the first area and the second area are located on the same side of the object.

[0015] According to an embodiment of the present disclosure, the distance between the first target point and the ground is dynamically adjustable; and / or the distance between the second target point and the ground is dynamically adjustable.

[0016] Another aspect of an embodiment of the present disclosure provides a radiation detection device, comprising: a carrying device, comprising a portal structure, the portal structure defining a detection channel; a radiation detection system as described in any of the above items, installed on the carrying device, the radiation detection system being configured to scan stationary or moving objects in the detection channel.

[0017] According to an embodiment of the present disclosure, the portal structure includes a horizontal arm and a vertical arm, and one end of the horizontal arm is connected to one end of the vertical arm; wherein, at least part of the first detector of the first ray scanning device in the radiation detection system is installed on the horizontal arm, and the rest is installed on the vertical arm, and the second detector of the second ray scanning device in the radiation detection system is installed on the vertical arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0019] FIG1 schematically shows an application scenario of a radiation detection method according to an embodiment of the present disclosure;

[0020] FIG2 schematically shows a flow chart of a radiation detection method according to an embodiment of the present disclosure;

[0021] FIG3 schematically shows a flow chart of an asynchronous control mode under a dual-source dual-detection structure according to an embodiment of the present disclosure;

[0022] FIG4 schematically shows a flow chart of a synchronous control mode under a dual-source dual-detection structure according to an embodiment of the present disclosure;

[0023] FIG5 schematically shows a flow chart of a separate control mode under a dual-source dual-detection structure according to an embodiment of the present disclosure;

[0024] FIG6 schematically shows a structural block diagram of a radiation detection device according to an embodiment of the present disclosure;

[0025] FIG7 schematically shows an example diagram of a radiation detection system according to an embodiment of the present disclosure;

[0026] FIG8 schematically shows an example diagram of a vehicle-mounted radiation detection system according to an embodiment of the present disclosure;

[0027] FIG9 schematically shows a flow chart of mobile scanning according to an embodiment of the present disclosure;

[0028] FIG10 schematically shows a block diagram of an electronic device suitable for implementing a radiation detection method according to an embodiment of the present disclosure.

[0029] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of the overall / local structures or overall / local areas may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0031] In the technical solution disclosed herein, the human body information (including but not limited to human body image information, human-carried device information, object information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in radiation detection are all information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data comply with the relevant laws, regulations and standards of relevant countries and regions, take necessary confidentiality measures, do not violate public order and good customs, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0032] Figure 1 schematically illustrates an application scenario of a radiation detection method according to an embodiment of the present disclosure. It should be noted that Figure 1 is merely an example of an application of the present disclosure to help those skilled in the art understand the technical content of the present disclosure, and does not imply that the present disclosure cannot be applied to other devices, systems, environments, or scenarios.

[0033] As shown in FIG1 , an application scenario 100 according to this embodiment may include terminal devices 101, 102, and 103, a network 104, a server 105, a first ray scanning device 106, a second ray scanning device 107, and an object 108. The network 104 is a medium for providing a communication link between the terminal devices 101, 102, and 103, the server 105, the first ray scanning device 106, and the second ray scanning device 107. The network 104 may include various connection types, such as wired or wireless communication links or fiber optic cables.

[0034] In some embodiments, for example, the first ray scanning device 106 and the second ray scanning device 107 are locally configured with the terminal devices 101, 102, and 103. Alternatively, in other embodiments, the terminal devices 101, 102, and 103 and the server 105 are remotely connected to the first ray scanning device 106 and the second ray scanning device 107. For example, the data collected by the first ray scanning device 106 and the second ray scanning device 107 are transmitted to the terminal devices 101, 102, and 103 and / or the server 105 via the network 104.

[0035] The terminal devices 101 , 102 , and 103 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, laptop computers, and desktop computers.

[0036] The server 105 may be a server that provides various services, such as a background management server (for example only) that supports data transmitted by users using the terminal devices 101, 102, and 103. The background management server may analyze and process received data such as user requests, and feed back the processing results (such as web pages, information, or data obtained or generated according to user requests) to the terminal device, for example, generating a radiation scan image upon receiving a signal from a detector.

[0037] The server 105 may be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud computing, network services, and middleware services.

[0038] It should be noted that the radiation detection method provided in the embodiment of the present disclosure can be executed by the terminal device 101, 102, 103 or the server 105. Accordingly, the radiation detection device provided in the embodiment of the present disclosure can generally be set in the terminal device 101, 102, 103 or the server 105.

[0039] The radiation detection method of an embodiment of the present disclosure will be described in detail below based on the scenario described in FIG1 .

[0040] FIG2 schematically shows a flow chart of a radiation detection method according to an embodiment of the present disclosure.

[0041] As shown in FIG2 , the radiation detection method of this embodiment includes:

[0042] In operation S210 , the first ray scanning device 106 is controlled to scan a first region of the object 108 to obtain a first image.

[0043] In operation S220 , the second ray scanning device 107 is controlled to scan a second area of ​​the object 108 to obtain a second image, wherein at least a portion of the second area is outside the first area and vertically below the first area.

[0044] It is understood that "outside the first area" can be considered a scanning blind zone of the first ray scanning device 106. The second area covers at least a portion of the scanning blind zone. Specifically, the scanning blind zone refers to the area of ​​the entire to-be-scanned area of ​​the object 108 that exceeds the maximum scanning range of the first ray scanning device 106 and cannot be scanned. Preferably, the second area covers the entire scanning blind zone of the first ray scanning device 106 outside the first area. That is, the first and second areas cover the entire to-be-scanned area of ​​the object 108. Preferably, the second area is equal to the scanning blind zone.

[0045] As shown in Figure 1 , a first ray scanning device 106 and a second ray scanning device 107 can be manually or automatically controlled by terminal devices 101, 102, 103 or server 105 to scan an object 108. The first ray scanning device 106 and the second ray scanning device 107 can have the same or different structures, radiation doses, sizes, models, target locations, scanning ranges, and other parameters. At least one of the first ray scanning device 106 and the second ray scanning device 107 can use multi-energy or mono-energy radiation for scanning.

[0046] Objects 108 may include objects, such as vehicles, containers, luggage, or other items in security inspection scenarios, or various materials in material analysis scenarios. Objects 108 may also include human bodies, such as people passing through security inspection channels at stations, airports, or other public places.

[0047] In some embodiments, the first area is located above the object, the scanning blind area is located below the first area, and at least part of the second area is located below the first area. Therefore, when the first ray scanning device 106 has a scanning blind area below the object 108 due to reasons such as ground clearance and departure angle, the second ray scanning device 108 can cooperate with it to scan the scanning blind area.

[0048] In some embodiments, the first ray scanning device 106 and the second ray scanning device 107 may be controlled to scan the same side of the object 108. The first area includes an upper area of ​​the side of the object 108, and the second area includes a lower area of ​​the side of the object 108. The lower area may include part or all of the area of ​​the side below the upper area.

[0049] In some embodiments, at least a portion of the second region is located outside the first region, which includes: the second region intersecting with the first region, or the second region and the first region being independent of each other.

[0050] For example, if there is an intersection between the second area and the first area, "at least a portion of the area in the second area" refers to a portion or all of the area in the second area excluding the intersection. Alternatively, if there is no intersection between the second area and the first area, "at least a portion of the area in the second area" refers to the entire second area. To elaborate, when there is an intersection between the second area and the first area, the portion of the second area outside the first area covers part of the scanning blind area, that is, does not cover the entire scanning blind area; or, when there is an intersection between the second area and the first area, the portion of the second area outside the first area covers the entire scanning blind area. When there is no intersection between the second area and the first area, the entire second area is in the scanning blind area, which can cover part or all of the scanning blind area.

[0051] In some embodiments of the present disclosure, it may be preferable to have the second area cover the entire scanning blind area. Preferably, the second area does not intersect with the first area, and the second area covers the entire scanning blind area. In this case, the first image and the second image can be directly spliced. Preferably, the second area intersects with the first area, and the portion of the second area outside the first area covers the entire scanning blind area. In this case, the same content in the first and second images can be cropped or directly merged.

[0052] In some embodiments, a passive scanning mode may be employed during the radiation detection process, for example, the object 108 moves during the scanning process (e.g., moves on its own or is driven by a conveyor), thereby ensuring that every portion within the first and second regions of the object 108 passes through the radiation detection region. In other embodiments, an active scanning mode may be employed during the radiation detection process, wherein the first and second radiation scanning devices 106 and 107 move automatically or are driven by a mobile device such as a vehicle, while the object 108 remains stationary, thereby ensuring that every portion within the first and second regions of the object 108 passes through the radiation detection region.

[0053] For example, a scan result of the object can be obtained based on the first and second images. The first and second images can be analyzed and processed separately, or the first and second images can be fused into a single image for analysis and processing. The analyzed and processed scan result can be used to achieve security inspection or object composition analysis, etc.

[0054] According to an embodiment of the present disclosure, the first radiation scanning device 106 and the second radiation scanning device 107 are used in conjunction to scan a first area and a second area of ​​an object 108. Because at least a portion of the second area is located outside the first area, it covers at least a portion of the scanning blind spot of the first radiation scanning device 106 outside the first area. This improves the scanning coverage rate, thereby enabling the scanning of the entire target area on the object 108, avoiding situations such as missing dangerous objects from the scan, and achieving an ideal scanning effect.

[0055] In some embodiments, the first radiation scanning device 106 includes an X-ray accelerator, and the second radiation scanning device 107 includes an X-ray machine. In some embodiments, the first radiation scanning device 106 also includes a first detector configured to operate simultaneously with the X-ray accelerator to receive radiation emitted therefrom, and the second radiation scanning device 107 also includes a second detector configured to operate simultaneously with the X-ray machine to receive radiation emitted therefrom.

[0056] For example, an X-ray accelerator includes an accelerating tube, a target, and a collimator. The target is located at the front end of the accelerating tube. The collimator has a collimating slit extending in the front-to-back direction, and the front end of the accelerating tube is connected to the rear end of the collimator. After being accelerated in the accelerating tube, charged particles form an X-ray beam by colliding with the target. For example, an X-ray machine can irradiate an object 108 with an X-ray beam generated by a ray tube, so that the rays pass through the object 108 and are received by a detector. The detector converts the X-rays into signals, which are amplified and processed, and then a corresponding image is displayed on a display screen. The X-ray accelerator and / or the X-ray machine can emit X-rays in the form of a cone beam, a fan beam, or a flying spot.

[0057] X-ray accelerators require a certain amount of space to accelerate charged particles. For example, the accelerating tube usually has a long track, which requires a sufficient distance to accelerate the charged particles. In addition, a certain amount of space is also required to set up the target, collimator or other accelerating components. This results in the overall size of the X-ray accelerator being larger and the target position being higher from the ground, which causes the scanning boundary of the X-rays emitted from the target position to be a certain distance from the ground. For example, it is impossible to scan the chassis and tires of the vehicle, resulting in the existence of a scanning blind spot. Some embodiments of the present disclosure propose that an X-ray machine with a smaller volume than the X-ray accelerator can be configured. For example, the target of the X-ray machine is located below the target of the X-ray accelerator and closer to the ground, so that the X-rays emitted by the X-ray machine cover at least part of the scanning blind spot of the X-ray accelerator.

[0058] According to an embodiment of the present disclosure, a smaller X-ray machine is configured so that its target is located below the target of the X-ray accelerator and closer to the ground. On the one hand, this solves the problem of blind spots in X-ray accelerator scanning. On the other hand, due to the smaller size of the X-ray machine, it can be more flexibly placed in existing space, reducing the space occupied by the equipment. This can save costs, obtain more comprehensive scanning results, and improve detection accuracy. On the other hand, the smaller size of the X-ray machine makes it easier to move and adjust its position to accommodate different scanning needs. This flexibility makes the X-ray machine more convenient in practical applications and can be applied to different scenarios and environments.

[0059] In a dual-source, dual-detector configuration (hereinafter referred to as dual-source, dual-detector) comprising an X-ray accelerator and a first detector, and an X-ray machine and a second detector, both sources and detectors can be controlled simultaneously by sending a single activation signal, or independently by sending activation signals to each source and detector. Under simultaneous or independent control, a synchronous control mode for the dual-source, dual-detector configuration can be achieved. Under independent control, the dual-source, dual-detector configuration can be controlled asynchronously, synchronously, or independently. Each control mode is further described below.

[0060] FIG3 schematically shows a flow chart of an asynchronous control mode in a dual-source dual-detection structure according to an embodiment of the present disclosure.

[0061] As shown in FIG3 , this embodiment includes:

[0062] In operation S310, an X-ray accelerator and an X-ray optical machine are controlled to emit rays asynchronously to sequentially scan an object.

[0063] In operation S320 , the first detector and the second detector are controlled to asynchronously receive radiation.

[0064] The X-ray accelerator and the first detector are started and enter the working state at the same time, and the X-ray machine and the second detector are also started and enter the working state at the same time. Asynchronous means that the first ray scanning device 106 and the second ray scanning device 107 send rays to scan the object 108 in sequence.

[0065] In some embodiments, controlling the first detector and the second detector to asynchronously receive radiation includes controlling one of the first detector and the second detector to start receiving radiation first. After the first detector starts receiving radiation, controlling the first detector to send a start signal to the other detector to control the other detector to start receiving radiation later.

[0066] For example, when one of the first detector and the second detector is started first, the radiation source (X-ray accelerator or X-ray machine) corresponding to the first detector is also started to emit radiation at the same time.

[0067] In some embodiments, controlling the first detector and the second detector to asynchronously receive radiation includes controlling the first detector to start first to receive radiation emitted by the X-ray accelerator. After the first detector finishes receiving radiation, controlling the first detector to send a start signal to the second detector to control the second detector to receive radiation emitted by the X-ray machine.

[0068] For example, if the object is a truck, when the truck enters the scanning area, the X-ray machine scans continuously because only the lower area of ​​the truck is scanned, so there is no need to consider the cab avoidance. In an exemplary embodiment, after the cab passes through the scanning area, the X-ray accelerator is turned on (to achieve the front avoidance of the X-ray accelerator) and the X-ray machine is turned off. The X-ray accelerator and the X-ray machine scan the upper area and the lower area of ​​the truck asynchronously. The first detector and the second detector are started and stopped synchronously with the X-ray accelerator and the X-ray machine. In another exemplary embodiment, after the cab passes through the scanning area, the X-ray accelerator and the X-ray machine scan the upper area and the lower area of ​​the truck synchronously, and the first detector works alternately with the second detector to asynchronously receive rays, for example, the first detector is started first and the second detector is started later.

[0069] In other embodiments, the second detector may be controlled to start first to receive the radiation emitted by the X-ray machine. After the second detector finishes receiving the radiation, the second detector is controlled to send a start signal to the first detector to control the first detector to receive the radiation emitted by the X-ray accelerator.

[0070] For example, if the object is a truck, when the truck enters the scanning area, the X-ray machine continuously scans. Because only the lower area of ​​the truck is scanned, there is no need to consider the cab's avoidance. In one exemplary embodiment, after the cab passes through the scanning area, the X-ray machine remains active and scans first, and then the accelerator restarts scanning. In another exemplary embodiment, after the cab passes through the scanning area, the X-ray accelerator and the X-ray machine scan the upper and lower areas of the truck synchronously, while, for example, the second detector is activated first and the first detector is activated later, so that they receive radiation asynchronously at intervals.

[0071] It should be noted that when the X-ray accelerator and the X-ray machine asynchronously scan the upper and lower areas of the truck, the truck can pass through the scanning area twice, with the X-ray accelerator scanning the vehicle body outside the cab once, and the X-ray machine continuously scanning the truck again. In this way, the X-ray machine not only scans the X-ray accelerator's blind spot (the lower part of the truck body) but also scans the lower part of the truck cab. Compared to traditional radiation detection systems that use a single X-ray accelerator to scan the truck, this can further improve the truck's scanning detection range. Alternatively, the truck can pass through the scanning area once, with one of the X-ray accelerator and the X-ray machine first emitting radiation to scan the corresponding area, and then the other emitting radiation to scan the corresponding area. For example, the X-ray accelerator first scans the vehicle body area outside the cab, and the X-ray machine then scans the area below that vehicle body area.

[0072] For example, in this embodiment, one of the first detector and the second detector sends a start signal to the other, so that the other detector and its corresponding ray source can be started synchronously.

[0073] In other embodiments, the accelerator source detector and the optical source detector can be controlled separately. For example, a controller (e.g., terminal devices 101, 102, or 103) can first send a first activation signal to the X-ray accelerator and first detector to activate the accelerator source detector and put it into operation. After the accelerator source detector completes its scan, for example, when the first detector stops receiving radiation, the controller then sends a second activation signal to the X-ray optical machine and second detector to instruct the optical source detector to continue scanning until the scan is complete.

[0074] In related art, using a first detector and a second detector to receive radiation simultaneously can cause interference, affecting imaging quality. According to embodiments of the present disclosure, by asynchronously receiving radiation, the first and second detectors can each receive radiation without interfering with each other. In other words, by having the detector that activates first send a start signal to the other detector, the first and second detectors can receive radiation in a predetermined order, avoiding interference and thus improving detection accuracy and reliability.

[0075] In some embodiments, the synchronous control mode may include, for example, the first ray scanning device 106 and the second ray scanning device 107 being two pulsed ray sources. Within a scanning cycle, the first ray scanning device 106 first emits a pulse beam. After a certain interval, the second ray scanning device 107 then emits a pulse beam. After another certain interval, the first ray scanning device 106 then emits another pulse beam, and so on. When the first ray scanning device 106 emits a beam, the first detector collects image information, and when the second ray scanning device 107 emits a beam, the second detector collects image information. For example, in this mode, both the accelerator source detector and the optical machine source detector can be controlled simultaneously. This is further explained below with reference to FIG4 .

[0076] FIG4 schematically shows a flow chart of a synchronous control mode in a dual-source dual-detection structure according to an embodiment of the present disclosure.

[0077] As shown in FIG4 , this embodiment includes:

[0078] In operation S410, the X-ray accelerator and the X-ray machine are controlled to emit X-rays synchronously to scan the object simultaneously. The synchronous emission of X-rays includes the above-mentioned method of pulsing the X-rays in one scanning cycle.

[0079] In operation S420 , the first detector and the second detector are controlled to synchronously receive radiation.

[0080] During the scanning process, the X-ray accelerator, the first detector, the X-ray machine and the second detector work simultaneously to achieve simultaneous scanning of the object 108. The two sources and detectors can work at the same time, reducing the scanning time and improving the scanning speed and efficiency.

[0081] In some embodiments, if the first image and the second image have the same image content, the following steps may be performed:

[0082] cutting out the same image content in either the first image or the second image, and splicing the cut image with the other image to obtain a first scan result image; or

[0083] Overlaying one of the first image and the second image on the other to obtain a second scan result image, where the coverage range is the range of the same image content; or

[0084] The same image contents between the first image and the second image are fused and stitched together to obtain a third scan result image. The fusion includes screening and retaining parameters of pixels at the same position in the same image contents according to preset scanning requirements.

[0085] Stitching combines two images to create a single image with more content. Fusion combines the identical portions of two images while pre-selecting and preserving pixel parameters based on pre-set scanning requirements. Pre-set scanning requirements can be used to set pixel parameters such as color, contrast, brightness, and chroma, retaining the optimal parameters of the two images. This ensures that the resulting fused scan has a better presentation, improving detection accuracy and efficiency.

[0086] FIG5 schematically shows a flow chart of a separate control mode in a dual-source dual-detection structure according to an embodiment of the present disclosure.

[0087] The target point of the second ray scanning device is located below the target point of the first ray scanning device. As shown in FIG5 , this embodiment includes:

[0088] In operation S510, size information of an object is recognized.

[0089] In some embodiments, image recognition technology can be used to obtain vehicle model information, such as size and model. Image recognition technology can include template matching based on vehicle features or vehicle model classification based on machine learning models. In other embodiments, a laser ranging device can be used to scan object 108 with a laser beam to obtain dimensional information about object 108.

[0090] In operation S520, when the scanning area of ​​the second ray scanning device is greater than or equal to the range of the area to be scanned on the object, only the second ray scanning device is controlled to scan the object.

[0091] For example, the first ray scanning device 106 and the second ray scanning device 107 can be independently controlled to scan the object 108. The area to be scanned on the object 108 may include part or all of the area on the scanned side of the object 108, and can be flexibly determined based on the type and size of the object 108 and the detection requirements. The scanning area of ​​the second ray scanning device 107 refers to the range that the rays emitted by the second ray scanning device 107 can scan in active scanning mode or passive scanning mode.

[0092] For example, if the height of the object 108 is small enough to be covered by the scanning area of ​​the second ray scanning device 107, only the second ray scanning device 107 is used for scanning. For example, if the object 108 is a small car, the vertical distance of the scanning area of ​​the X-ray machine can be greater than or equal to the height of the car. Therefore, only the second ray scanning device 107 can be used to scan the entire scanning area of ​​the small car.

[0093] In related technologies, since X-rays have high radiation, if protective measures are not taken, they will cause unnecessary harm to the human body.

[0094] According to an embodiment of the present disclosure, when the second radiation scanning device 107 is capable of scanning the object 108, only the second radiation scanning device 107 can be controlled to perform scanning. This can save the cost of activating the first radiation scanning device 106. Furthermore, since the first radiation scanning device 106 does not emit radiation, the radiation dose leaked can be reduced, thereby reducing the radiation protection area.

[0095] It should be noted that after controlling the second ray scanning device 107 to perform scanning, the first ray scanning device 106 may be controlled to scan the object again as needed.

[0096] Based on the above radiation detection method, the present disclosure further provides a radiation detection device, which will be described in detail below in conjunction with FIG6 .

[0097] FIG6 schematically shows a structural block diagram of a radiation detection device according to an embodiment of the present disclosure.

[0098] As shown in FIG. 6 , the radiation detection device 600 of this embodiment includes a first control module 610 and a second control module 620 .

[0099] The first control module 610 may perform operation S210 to control the first ray scanning device to scan a first area of ​​the object to obtain a first image.

[0100] The second control module 620 can perform operation S220 to control the second ray scanning device to scan a second area of ​​the object to obtain a second image, wherein at least a portion of the second area is located outside the first area and the at least portion of the area is located below the first area in a vertical direction.

[0101] In some embodiments, the first control module 610 and the second control module 620 are used to respectively control the X-ray accelerator and the X-ray machine to asynchronously emit rays to scan the object in sequence, and respectively control the first detector and the second detector to asynchronously receive rays.

[0102] In some embodiments, one of the first control module 610 and the second control module 620 is used to control one of the first detector and the second detector to start first to receive radiation. After the detector that starts first finishes receiving radiation, the detector that starts first is controlled to send a start signal to the other detector. The other control module responds to the start signal to control the other of the first detector and the second detector to start later to receive radiation.

[0103] In some embodiments, the first control module 610 is configured to control the first detector to initially activate to receive radiation from the X-ray accelerator. After the first detector finishes receiving radiation, the first detector is controlled to send a start signal to the second detector. In response to the start signal, the second control module 620 controls the second detector to receive radiation from the X-ray machine.

[0104] In some embodiments, the first control module 610 and the second control module 620 are used to respectively control the X-ray accelerator and the X-ray machine to synchronously emit radiation to simultaneously scan the object, and respectively control the first detector and the second detector to synchronously receive radiation.

[0105] In some embodiments, the radiation detection device 600 may further include a scanning result module (not shown), which may be configured to obtain a scanning result of the object based on the first image and the second image.

[0106] In some embodiments, the radiation detection device 600 may also include an image processing module. When the first image and the second image have the same image content, the module is used to obtain a scanning result of the object based on the first image and the second image, including: cutting the same image content in any one of the first image and the second image, and splicing the cut image with the other image to obtain a first scanning result image; or covering one of the first image and the second image with the other, and splicing to obtain a second scanning result image, where the covered range is the range of the same image content; or fusing the same image content between the first image and the second image, and splicing to obtain a third scanning result image, where the fusion includes screening and retaining the parameters of pixels at the same position in the same image content according to preset scanning requirements.

[0107] In some embodiments, the first control module 610 and the second control module 620 are configured to respectively control the first ray scanning device and the second ray scanning device to scan the same side of the object.

[0108] In some embodiments, the radiation detection device 600 also includes a size recognition module, which is used to identify the size information of the object. The second control module 620 is communicated with the size recognition module and is used to only control the second ray scanning device to scan the object when the scanning area of ​​the second ray scanning device is greater than or equal to the range of the area to be scanned on the object.

[0109] It should be noted that the radiation detection device 600 includes modules for executing each step of any of the method embodiments described in Figures 2 to 5 above. The implementation methods, technical problems solved, functions implemented, and technical effects achieved of each module / unit / subunit in the device embodiments are the same or similar to the implementation methods, technical problems solved, functions implemented, and technical effects achieved of each corresponding step in the method embodiments, and are not further described here.

[0110] According to an embodiment of the present disclosure, any multiple modules among the first control module 610, the second control module 620, and the scan result module can be combined into a single module, or any one of these modules can be split into multiple modules. Alternatively, at least part of the functionality of one or more of these modules can be combined with at least part of the functionality of other modules and implemented in a single module.

[0111] According to an embodiment of the present disclosure, at least one of the first control module 610, the second control module 620, and the scan result module can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application-specific integrated circuit (ASIC), or can be implemented by hardware or firmware in any other reasonable manner of integrating or packaging the circuit, or implemented in any one of the three implementation methods of software, hardware, and firmware, or in an appropriate combination of any of them. Alternatively, at least one of the first control module 610, the second control module 620, and the scan result module can be at least partially implemented as a computer program module, which can perform the corresponding function when executed.

[0112] The present disclosure also provides a radiation detection system, in which the above-mentioned radiation detection method can be used. The radiation detection system is described in detail below.

[0113] Figure 7 schematically illustrates an example diagram of a radiation detection system according to an embodiment of the present disclosure. It should be noted that Figure 7 is merely an example of an application of the present disclosure to help those skilled in the art understand the technical content of the present disclosure. It does not imply that the present disclosure cannot have other sizes, models, positional relationships, or scanning ranges, nor does it imply that the present disclosure cannot be used in other devices, systems, environments, or scenarios.

[0114] 7 , radiation detection system 700 includes a first radiation scanning device 106 and a second radiation scanning device 107. First radiation scanning device 106 includes a first target point 1061, which emits radiation to scan a first region 1081 of an object 108. Second radiation scanning device 107 includes a second target point 1071, which is closer to the ground 701 than first target point 1061. Radiation emitted by second target point 1071 is used to scan a second region 1082 of the object 108. At least a portion of second region 1082 is located outside first region 1081 and vertically below first region 1081, thereby covering at least a portion of the scanning blind spot of first radiation scanning device 106 outside first region 1081.

[0115] For ease of understanding, the rays emitted by the first target point 1061 and the rays emitted by the second target point 1071 are represented in FIG. 7 using lines of different styles.

[0116] As shown in FIG7 , the distance between first target point 1061 and ground 701 is H1, and the distance between second target point 1071 and ground 701 is H2. H1 is greater than H2, and second target point 1071 is closer to ground 701 than first target point 1061. In other words, first target point 1061 is vertically higher than second target point 1071.

[0117] In some embodiments, both first target 1061 and second target 1071 emit radiation in a pulsed manner, and within a scanning cycle, when one emits radiation, the other does not. The first target 1061 and second target 1071 emit radiation in a pulsed manner within a scanning cycle, thereby achieving a synchronous control mode for first radiation scanning device 106 and second radiation scanning device 107. A scanning cycle includes the time between two consecutive radiation emissions from first target 1061 and second target 1071.

[0118] In addition to the dual-source dual-detector structure described above, in other embodiments, the radiation detection system also includes a dual-source single-detector structure. For example, the radiation detection system includes a first radiation scanning device 106, a second radiation scanning device 107, and a third detector (not shown). The third detector is configured to receive radiation emitted by the first target 1061 and the second target 1071.

[0119] In some embodiments, the third detector can be configured to distinguish between the radiation emitted by the first target 1061 and the second target 1071 by radiation dose. The radiation dose of the first target 1061 and the radiation dose of the second target 1071 may be the same or different. For example, the radiation dose of the first target 1061 may be greater than the radiation dose of the second target 1071. For example, the radiation dose of an X-ray accelerator is generally greater than the radiation dose of an X-ray machine. For another example, if the radiation dose of the first target 1061 is equal to the radiation dose of the second target 1071, the third detector can be configured to distinguish between the radiation emitted by the first target 1061 and the second target 1071 by their beam emission times.

[0120] For example, regardless of whether the first target 1061 and the second target 1071 emit radiation synchronously or asynchronously, the third detector can determine who sent the radiation by receiving the radiation dose, thereby accurately identifying the radiation scanning device and obtaining the corresponding scan image.

[0121] According to an embodiment of the present disclosure, a first radiation scanning device 106 and a second radiation scanning device 107 are used in conjunction with each other, with the first target point 1061 of the first device and the second target point 1071 of the second device being at different distances from the ground 701, with the second target point 1071 being closer to the ground 701 than the first target point 1061. This allows for scanning of different areas on the object 108, such as a first area 1081 and a second area 1082. Because at least a portion of the second area 1082 lies outside the first area 1081, it covers at least a portion of the scanning blind spot of the first radiation scanning device 106 outside the first area 1081. This improves scanning coverage, enabling scanning of the entire target area on the object 108, avoiding situations such as missing dangerous objects and failing to scan them, and achieving an ideal scanning effect.

[0122] In some embodiments, the first ray scanning device 106 includes an X-ray accelerator, and the second ray scanning device 107 includes an X-ray machine.

[0123] In some embodiments, the volume of the first radiation scanning device 106 is larger than that of the second radiation scanning device 107. Due to the smaller size of the second radiation scanning device 107, the footprint of the overall radiation detection system 700 can be reduced. For example, if the volume of an X-ray accelerator is larger than that of an X-ray machine, the height of the second target 1071 can be lowered, bringing it closer to the ground 701, effectively covering the X-ray accelerator's scanning blind spot. It should be noted that the volume of the first radiation scanning device 106 can also be equal to or smaller than that of the second radiation scanning device 107. Coverage of the first radiation scanning device 106's scanning blind spot can be achieved by adjusting the distance between the second target 1071 and the first target 1061 and the ground 701.

[0124] 7 , second target point 1071 is closer to object 108 than first target point 1061. This allows for proper coordination to successfully scan object 108, taking into account the volume difference between first and second ray scanning devices 106 and 107, as well as the distance difference between first and second targets 106 and 107 and ground 701.

[0125] 7 , the second ray scanning device 107 is placed between the first ray scanning device 106 and the object 108. This prevents the larger first ray scanning device 106 from blocking the rays emitted by the second target point 1071, thereby allowing the first target point 1061 and the second target point 1071, which are at different distances from the ground 701, to properly cooperate to successfully scan the object 108.

[0126] 7 , the first area 1081 and the second area 1082 are located on the same side of the object 108. This overcomes the problem of a blind spot when the first ray scanning device 106 or the second ray scanning device 107 scans the side.

[0127] In some embodiments, referring to FIG. 7 , the distance between the first target point 1061 and the ground 701 is dynamically adjustable; and / or the distance between the second target point 1071 and the ground 701 is dynamically adjustable. For example, at least one of the first radiation scanning device 106 and the second radiation scanning device 107 can be moved in the up-down direction shown in FIG. 7 to adjust H1 and H2, thereby changing the first area 1081 and the second area 1082 on the object 108 being scanned. As previously mentioned, even if the first radiation scanning device 106 can be moved in the up-down direction shown in FIG. 7 , it is still possible that the first radiation scanning device 106 may not scan the entire area of ​​the object 108 due to factors such as ground clearance and departure angle.

[0128] In some embodiments, some embodiments of the present disclosure further provide a radiation detection apparatus comprising a carrier and a radiation detection system as described in any of the above embodiments. The carrier includes a portal structure that defines a detection channel. The radiation detection system is mounted on the carrier and configured to scan stationary or moving objects in the detection channel. This is schematically illustrated below with reference to FIG8 .

[0129] FIG8 schematically shows an exemplary diagram of a vehicle-mounted radiation detection system 800 according to an embodiment of the present disclosure. The radiation detection apparatus includes the vehicle-mounted radiation detection system shown in FIG8 .

[0130] In some embodiments, referring to FIG8 , a vehicle-mounted radiation detection system 800 includes a vehicle 810 (i.e., a carrier) and a radiation detection system 700. Vehicle 810 includes a vehicle body 805 and a cantilever structure 801. The cantilever structure 801 and the vehicle body 805 together define a door-like structure having a detection channel 802 therein. Radiation detection system 700 is mounted on vehicle body 805 and is configured to scan stationary or moving objects 108 within detection channel 802.

[0131] For example, cantilever structure 801 can be deployed or retracted. When cantilever structure 801 is retracted, vehicle 810 is in a non-detection state and can perform operations such as site transfer. When cantilever structure 801 is deployed as shown in FIG8 , detection channel 802 is formed, and security inspection operations can begin. For example, during the security inspection process, detection channel 802 allows object 108 to be scanned in either active or passive scanning mode.

[0132] 8 , in some embodiments, the first radiation scanning device 106 of the radiation detection system 700 includes a first detector 803 configured to receive radiation emitted from a first target 1061. The second radiation scanning device 107 of the radiation detection system 700 includes a second detector 804 configured to receive radiation emitted from a second target 1071. The first detector 803 and the second detector 804 are mounted on a cantilever structure 801.

[0133] In some embodiments, referring to FIG8 , a portal structure includes a horizontal arm 8011 and a vertical arm 8012 on a cantilever structure 801. One end of the horizontal arm 8011 is connected to one end of the vertical arm 8012. A vehicle body 805, the horizontal arm 8011, and the vertical arm 8012 define a detection channel 802. At least a portion of a first detector 803 is mounted on the horizontal arm 8011, while the remaining portion is mounted on the vertical arm 8012. A second detector 804 is mounted on the vertical arm 8012.

[0134] As shown in Figure 8, radiation emitted by first target 1061 can be received by first detector 803 located on horizontal arm 8011 and vertical arm 8012. First detector 803 includes multiple detector modules forming a detector array. Radiation emitted by second target 1071 can be received by second detector 804 located on vertical arm 8012. Second detector 804 includes multiple detector modules forming a detector array.

[0135] 8 , the vehicle may further include a carrying platform 806, on which a first support column 807 and a second support column 808 are mounted. The cantilever structure 801 is connected to the first support column 807 and the second support column 808. For example, FIG8 currently shows the deployed state of the cantilever structure 801, with the horizontal arm 8011 perpendicular to the direction of movement of the vehicle. The carrying platform 806 can rotate to drive the horizontal arm 8011 and the vertical arm 8012 to rotate to a position parallel to the direction of movement of the vehicle until the cantilever structure 801 reaches the retracted state. In some embodiments, the X-ray accelerator and the optical machine rotate simultaneously with the cantilever structure 801, so that the first target and the second target always maintain the same relative positional relationship with their respective detectors, thereby improving the efficiency of ray scanning and the effect of radiation detection.

[0136] In some embodiments, referring to FIG8 , when a dual-source, dual-detector structure is employed, at least a portion of the first detector 803 mounted on the vertical arm 8012 is positioned above the second detector 804. This allows the first detector 803 to better receive radiation emitted by the first target 1061, while the second detector 804 to better receive radiation emitted by the second target 1071, and reduces the cost of deploying the first detector 803. In other embodiments, the first detector 803 mounted on the vertical arm 8012 can be installed entirely within the vertical arm 8012. In other words, not only can a portion of the first detector 803 be positioned above the second detector 804, but portions of the first detector 803 and the second detector 804 can also be positioned at the same height within the vertical arm 8012. While this increases the cost of deploying the first detector 803, it can expand the scanning range of the first target 1061. In this case, the detection surfaces of the first and second detectors 803, 804, can be located on different vertical planes.

[0137] In other embodiments, a dual-source, single-detector architecture can be employed, where the X-ray accelerator and the X-ray machine share a single detector (e.g., a third detector). In this case, the X-ray accelerator and the X-ray machine can be controlled to emit radiation asynchronously or synchronously, while the detector operates during both the X-ray accelerator and the X-ray machine, for example, determining which radiation source received the radiation based on the time or dose of the radiation received. In this case, the beam exit surfaces of the accelerator and the machine can be coplanar, sharing a single accelerator, with both sources and detectors coplanar.

[0138] Continuing with reference to Figure 8 , assuming that the ray 10611 emitted by the first target point 1061 and located at the bottom of Figure 8 is the lowest position ray emitted by it, there is usually a scanning blind area below this ray, and the ray emitted by the second target point 1071 can cover the scanning blind area and scan the lower area of ​​the object 108 in the detection channel 802.

[0139] In some embodiments, the second detector 804 is installed in the air conditioning return duct within the vertical arm 8012. This allows the second detector 804 to be installed in the space defined by the original structure of the vertical arm 8012, avoiding the need to redesign and produce the vertical arm 8012, thereby reducing costs.

[0140] In some embodiments, as shown in cross-sectional area A1 of FIG8 , the radiation detection system 700 is mounted on a vehicle body 805, and the first radiation scanning device 106 and the second radiation scanning device 107 of the radiation detection system 700 are mounted on the bottom of the vehicle body 805. For example, the tops of the first radiation scanning device 106 and the second radiation scanning device 107 are connected to the bottom of the vehicle body 805, or a carrying box is provided at the bottom of the vehicle body 805, and the first radiation scanning device 106 and the second radiation scanning device 107 are placed in the carrying box.

[0141] In some embodiments, a fourth detector may be provided below the detection channel 802. For example, the fourth detector may be located on the ground or below the ground, and may detect rays passing through the bottom of the object 108, or rays emitted by the first target 1061 or the second target 1071 and propagating to the ground.

[0142] It should be noted that the vehicle-mounted radiation detection system 800 is only one embodiment of the radiation detection device provided by this disclosure. For example, the shape and structure of the supporting device are not limited. For example, the accelerator and optical engine can be mounted on a gantry, which can be movable or fixed. Both the vehicle-mounted and gantry systems are examples, and this disclosure is not limited to either vehicle-mounted or gantry systems, nor to the objects being detected.

[0143] FIG9 schematically shows a flow chart of mobile scanning according to an embodiment of the present disclosure.

[0144] As shown in FIG9 , referring to FIG8 , this embodiment includes:

[0145] In operation S910 , the vehicle 810 is controlled to unfold the cantilever structure 801 to form a detection channel 802 .

[0146] In operation S920 , the vehicle 810 is controlled to move so that the object 108 is located within the detection channel 802 .

[0147] In operation S930 , while the vehicle 810 is moving, operations of controlling the first ray scanning device 106 to scan the first area 1081 of the object 108 and controlling the second ray scanning device 107 to scan the second area 1082 of the object 108 are performed.

[0148] FIG10 schematically shows a block diagram of an electronic device suitable for implementing a radiation detection method according to an embodiment of the present disclosure. Referring to FIG8 , the electronic device may be installed on a vehicle 810 .

[0149] As shown in Figure 10, the electronic device 1000 according to an embodiment of the present disclosure includes a processor 1001, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage part 1008 into a random access memory (RAM) 1003. The processor 1001 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 1001 may also include an onboard memory for caching purposes. The processor 1001 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present disclosure.

[0150] Various programs and data required for the operation of the electronic device 1000 are stored in the RAM 1003. The processor 1001, the ROM 1002, and the RAM 1003 are connected to each other via a bus 1004. The processor 1001 executes the various operations of the method flow according to the embodiment of the present disclosure by executing the programs in the ROM 1002 and / or the RAM 1003. It should be noted that the programs may also be stored in one or more memories other than the ROM 1002 and the RAM 1003. The processor 1001 may also execute the various operations of the method flow according to the embodiment of the present disclosure by executing the programs stored in the one or more memories.

[0151] According to an embodiment of the present disclosure, the electronic device 1000 may further include an input / output (I / O) interface 1005, which is also connected to the bus 1004. The electronic device 1000 may further include one or more of the following components connected to the I / O interface 1005: an input portion 1006 including a keyboard, a mouse, etc.; an output portion 1007 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage portion 1008 including a hard disk, etc.; and a communication portion 1009 including a network interface card such as a LAN card, a modem, etc. The communication portion 1009 performs communication processing via a network such as the Internet. A drive 1010 is also connected to the I / O interface 1005 as needed. A removable medium 1011, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed in the drive 1010 as needed so that a computer program read therefrom can be installed into the storage portion 1008 as needed.

[0152] The present disclosure also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments. Alternatively, the computer-readable storage medium may exist independently, without being incorporated into the device / apparatus / system. The computer-readable storage medium carries one or more programs, which, when executed, implement the methods according to the embodiments of the present disclosure.

[0153] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, it may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, apparatus, or device. For example, according to an embodiment of the present disclosure, a computer-readable storage medium may include the ROM 1002 and / or RAM 1003 described above and / or one or more memories other than ROM 1002 and RAM 1003.

[0154] The embodiments of the present disclosure also include a computer program product, which includes a computer program containing program code for executing the method shown in the flowchart. When the computer program product is run in a computer system, the program code is used to enable the computer system to implement the method provided by the embodiments of the present disclosure.

[0155] The computer program executes the above functions defined in the system / device of the embodiment of the present disclosure when the processor 1001 executes the computer program. According to the embodiment of the present disclosure, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0156] In one embodiment, the computer program may be stored on a tangible storage medium such as an optical storage device or a magnetic storage device. In another embodiment, the computer program may be transmitted and distributed in the form of a signal on a network medium, downloaded and installed via the communication portion 1009, and / or installed from the removable medium 1011. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0157] In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 1009, and / or installed from the removable medium 1011. When the computer program is executed by the processor 1001, the above-described functions defined in the system of the embodiment of the present disclosure are performed. According to the embodiment of the present disclosure, the systems, devices, means, modules, units, etc. described above can be implemented by computer program modules.

[0158] According to an embodiment of the present disclosure, the program code for executing the computer program provided by the embodiment of the present disclosure can be written in any combination of one or more programming languages. Specifically, these computer programs can be implemented using high-level procedural and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, languages ​​such as Java, C++, python, "C" or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (for example, using an Internet service provider to connect via the Internet).

[0159] One or more of the above-mentioned embodiments have the following beneficial effects: by using a first ray scanning device and a second ray scanning device in conjunction, and with the first target point of the former and the second target point of the latter being at different distances from the ground, with the second target point being closer to the ground than the first target point, different areas on the object, such as the first area and the second area, can be scanned. Since at least part of the second area is located outside the first area, so as to cover at least part of the scanning blind area of ​​the first ray scanning device outside the first area, the radiation detection system of the present disclosure can improve the scanning coverage rate, achieve scanning of all target areas on the object, and achieve an ideal scanning effect. For example, in the case where the first ray scanning device is an accelerator, an X-ray machine with a lower target point can be added as the second ray scanning device without changing the original structure of the accelerator, thereby effectively reducing or eliminating the scanning blind area caused by the high target point of the accelerator.

[0160] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0161] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways, even if such combinations and / or couplings are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or couplings are intended to fall within the scope of this disclosure.

[0162] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A radiation detection system, comprising: A first ray scanning device, including a first target point, and the first target point emits rays for scanning a first area of an object; A second ray scanning device, including a second target point, and the second target point is closer to the ground than the first target point, and the rays emitted by the second target point are used to scan a second area of the object; Wherein, at least part of the second area is located outside the first area, and the at least part of the area is located below the first area in the vertical direction.

2. The system according to claim 1, wherein, The first ray scanning device includes an X-ray accelerator, and the second ray scanning device includes an X-ray machine.

3. The system according to claim 1 or 2, wherein, The first ray scanning device further includes a first detector, and the first detector is configured to receive the rays emitted by the first target point; and The second ray scanning device further includes a second detector, and the second detector is configured to receive the rays emitted by the second target point.

4. The system according to claim 1 or 2, further comprising: A third detector, configured to receive the rays emitted by the first target point and the second target point.

5. The system according to claim 1 or 2, wherein, Both the first target point and the second target point emit rays in a pulsed beam output manner, and when one of them emits rays within one scanning cycle, the other does not emit rays.

6. The system according to claim 1 or 2, wherein, The second target point is closer to the object than the first target point.

7. The system according to claim 1 or 2, wherein The second ray scanning device is disposed between the first ray scanning device and the object.

8. The system according to claim 7, wherein, The second ray scanning device is disposed obliquely below the first ray scanning device.

9. The system according to claim 1 or 2, wherein The first area and the second area are located on the same side of the object.

10. The system according to claim 1 or 2, wherein The distance of the first target point relative to the ground is dynamically adjustable; and / or, the distance of the second target point relative to the ground is dynamically adjustable.

11. A radiation detection device, comprising: A carrying device, including a gantry structure, and the gantry structure defines a detection channel; The radiation detection system according to any one of claims 1 to 10, installed on the carrying device, and the radiation detection system is configured to scan a stationary or moving object in the detection channel.

12. The device according to claim 11, wherein, The gantry structure includes a horizontal arm and a vertical arm, and one end of the horizontal arm is connected to one end of the vertical arm; Wherein, at least part of the first detector in the first ray scanning device of the radiation detection system is installed on the horizontal arm, and the remaining part is installed on the vertical arm, and the second detector of the second ray scanning device in the radiation detection system is installed on the vertical arm.

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