Ray scanning system

Abstract

The invention provides a ray scanning system. The ray scanning system comprises M distributed ray sources; a detector; the M distributed ray sources are connected to the lifting mechanism, and the lifting mechanism is used for driving the M distributed ray sources to move in the first direction; the imaging bracket is used for supporting a scanning object, and at least one part of the imaging bracket is configured to be capable of moving in the first direction; the detector support is used for supporting the detector, the detector support is connected to the imaging bracket, and the M distributed ray sources and the detector can form a scanning space surrounding at least one part of a scanning object under the driving of the lifting mechanism so as to carry out scanning imaging on the scanning object which can be in at least two different states; and the radiation device is used for transmitting a preset dose of radiation to the target area according to the projection data under the condition that the scanning object is not moved.

Description

Technical Field

[0001] The present disclosure relates to the field of radiation scanning technology, and more particularly, to a ray scanning system. Background Art

[0002] With the continuous advancement of medical imaging technology, CT (computed tomography) imaging devices are increasingly used in clinical diagnosis. While traditional supine CT imaging devices excel in many areas, they have limitations in diagnosing certain conditions. For example, for conditions such as lumbar disc herniation and uterine prolapse, where symptoms are pronounced when weight-bearing or in an upright position, supine CT devices cannot provide a true assessment of the lesion. Furthermore, when examining areas such as the head, chest, lungs, and abdomen, supine CT devices require patients to spend considerable time adjusting their body position, compromising examination efficiency.

[0003] To address these issues, research has led to the development of standing or sitting CT imaging systems. By allowing patients to undergo scans while standing naturally, these systems enable more realistic and accurate assessment of lesions. These systems not only save patient positioning time and improve examination efficiency, but also effectively reduce floor space usage by eliminating the need for a scanning bed, freeing up space in the medical office for physicians' activities and other equipment.

[0004] However, existing standing or sitting CT imaging devices still have several shortcomings. First, they rely on the single-source slip-ring rotary scanning method used in recumbent CT imaging devices. This involves a ring-shaped mainframe containing the source, detector, and slip rings, which is horizontally fixed to the device frame. This approach is limited by the mechanical bottleneck of the slip ring's high-speed rotation, resulting in the temporal resolution of standing CT imaging devices reaching its limit, making it difficult to meet the growing clinical demand for rapid scanning imaging.

[0005] Secondly, existing standing or sitting CT imaging devices do not adopt a suspended structure design, which fails to fully utilize the top space of the medical clinic and reduce the floor space occupied.

[0006] It should be noted that the above information disclosed in this section is only for understanding the background of the inventive concept of the present disclosure and therefore, the above information may contain information that does not constitute the prior art. Summary of the Invention

[0007] In view of at least one aspect of the above technical problems, the present disclosure provides a ray scanning system, the ray scanning system comprising: M distributed ray sources, wherein at least one distributed ray source comprises q target points, the q target points being configured to be activated in a predetermined order to emit rays, M being a positive integer, and q being a positive integer greater than or equal to 2; a detector, the detector being used to detect rays emitted from the M distributed ray sources and passing through a scanned object; a lifting structure, the M distributed ray sources being connected to the lifting mechanism, the lifting mechanism being used to drive the M distributed ray sources to move along a first direction; an imaging bracket, the imaging bracket being used to support the scanned object ... At least a portion of the bracket is configured to be movable along a first direction; a detector bracket for supporting the detector, the detector bracket being connected to the imaging bracket, wherein the M distributed ray sources and the detector, driven by the lifting mechanism, can form a scanning space surrounding at least a portion of the scanning object, so as to perform scanning imaging on the scanning object that can be in at least two different states, wherein, during the scanning imaging process, the M distributed ray sources and the detector are arranged relative to each other in the radial direction of the scanning space; and a radiation device, wherein the radiation device is used to deliver a predetermined dose of radiation to the target area according to the projection data when the scanning object is stationary.

[0008] According to some exemplary embodiments, the at least two different states include a standing state and a sitting state.

[0009] According to some exemplary embodiments, the imaging bracket includes an object supporting platform and a lifting platform, wherein the lifting platform supports the object supporting platform to move along a first direction and is used to adjust the height of the object supporting platform in the first direction.

[0010] According to some exemplary embodiments, the lifting mechanism includes: a lifting end, which is configured to be able to move along a first direction; a fixed end, which is fixedly connected to a first fixed structure; and a first tray, which is connected to the lifting end and is used to carry the M distributed radiation sources.

[0011] According to some exemplary embodiments, the detector bracket includes a second tray, and the detector is connected to the second tray.

[0012] According to some exemplary embodiments, a first limiting device is provided on the first tray, and a second limiting device is provided on the second tray. The first limiting device and the second limiting device are configured to cooperate with each other to limit the M radiation sources and the detector.

[0013] According to some exemplary embodiments, the radiation device includes a radiation head and a fixed pillar, the fixed pillar includes a first end and a second end arranged opposite to each other along a first direction, the second end is connected to a second fixed structure, the second end is set to be spaced a preset distance from the imaging bracket in a second direction, and the second direction is perpendicular to the first direction; the radiation head is fixedly connected to the first end, and a collimation system is provided at the outlet of the radiation head, and the collimation system is used to collimate the radiation beam emitted by the radiation head to the target area.

[0014] According to some exemplary embodiments, the first tray includes a first side and a second side arranged opposite to each other in the first direction, the first side is upstream of the second side, the second tray includes a third side and a fourth side arranged opposite to each other in the first direction, the third side is upstream of the fourth side; and the M distributed ray sources are arranged on the second side, and the detector is arranged on the fourth side.

[0015] According to some exemplary embodiments, multiple target points of the distributed radiation source and at least a portion of the detector are located in the same imaging plane, and the imaging plane is tilted at a target tilt angle relative to a reference plane perpendicular to the first direction, wherein the target tilt angle is determined based on the range of the radiation beam emitted by the radiation head.

[0016] According to some exemplary embodiments, the imaging system further includes: a first pivot structure for pivotally connecting the first tray to the lifting device; and a second pivot structure for pivotally connecting the second tray to the imaging bracket.

[0017] According to some exemplary embodiments, the system according to claim 9 is characterized in that the diameter of the imaging plane is greater than or equal to 0.8 m.

[0018] According to some exemplary embodiments, the first limiting device includes N positioning pins, and the second limiting device includes N positioning holes. The positioning pins and the positioning holes correspond one to one in terms of their projected positions in the first direction, and N is a positive integer greater than or equal to 2.

[0019] According to some exemplary embodiments, the ray receiving angle coverage range of the detector is greater than the ray angle coverage range of the M distributed ray sources, and the detector units of the detector are spliced ​​and arranged based on a preset interval, wherein the preset interval between the detector units is determined according to the size of the ray cone angle of q target points.

[0020] In the imaging system according to the embodiment of the present disclosure, a configuration of distributed radiation sources and multiple targets is adopted, combined with a lifting structure and an imaging bracket, which can realize rapid scanning and imaging of the scanned object in different states; at the same time, the design of the lifting structure effectively reduces the floor space occupied and optimizes the space utilization of the medical clinic; in addition, the system also supports precise radiation projection when the scanned object is not moving, further providing a more comprehensive and precise projection position, and expanding its scope and flexibility in clinical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above 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:

[0022] Figure 1 is a schematic structural diagram of a slip-ring type ray scanning imaging system according to some exemplary embodiments of the present disclosure;

[0023] Figure 2 is a schematic structural diagram of a distributed radiation source of a radiation scanning imaging system according to some exemplary embodiments of the present disclosure;

[0024] Figure 3 A perspective schematic diagram of an imaging system according to some exemplary embodiments of the present disclosure is shown;

[0025] Figure 4 According to some exemplary embodiments of the present disclosure, Figure 3 A cross-sectional view of an imaging space in an imaging system;

[0026] Figure 5A Some exemplary embodiments of the present disclosure are based on Figure 3 A front view of the imaging system;

[0027] Figure 5B Some exemplary embodiments of the present disclosure are based on Figure 3 A side view of an imaging system;

[0028] Figure 6A Schematic diagram showing a linear arrangement of q target points according to some exemplary embodiments of the present disclosure;

[0029] Figure 6B Schematic diagram showing a matrix arrangement of q target points according to some exemplary embodiments of the present disclosure;

[0030] Figure 7A Schematic diagram showing a plurality of distributed radiation sources arranged in a plurality of straight arc segments on a first tray according to some exemplary embodiments of the present disclosure;

[0031] Figure 7BSchematic diagram showing a plurality of distributed radiation sources arranged in a plurality of straight arc segments on a first tray according to other exemplary embodiments of the present disclosure;

[0032] Figure 7C Schematic diagram showing a plurality of distributed radiation sources arranged in an arc shape on a first tray according to some exemplary embodiments of the present disclosure;

[0033] Figure 7D Schematic diagram showing a plurality of distributed radiation sources arranged in an arc shape on a first tray according to some other exemplary embodiments of the present disclosure;

[0034] Figure 8A A schematic diagram showing the positional relationship between a distributed radiation source and a first tray according to some exemplary embodiments of the present disclosure is shown;

[0035] Figure 8B A schematic diagram showing the positional relationship between a distributed radiation source and a first tray according to some other exemplary embodiments of the present disclosure;

[0036] Figure 9 A schematic diagram showing a plurality of targets and detectors in a same imaging plane tilted relative to a reference plane according to some exemplary embodiments of the present disclosure is shown;

[0037] Figure 10A is a side view of a ray scanning system according to some exemplary embodiments of the present disclosure, wherein a first limiting device and a second limiting device cooperate to limit position;

[0038] Figure 10B is a side view of a radiation scanning system according to some exemplary embodiments of the present disclosure, wherein the first limiting device and the second limiting device are out of position;

[0039] Figure 11 A block diagram of an electronic device suitable for implementing the above-described method according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0040] 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.

[0041] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0042] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0043] When expressions such as "at least one of A, B, and C, etc." are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0044] It should be noted that in this article, computed tomography (also known as CT) imaging refers to the use of radiation to perform tomographic scanning on the object to be imaged, and the analog signal received by the detector is converted into a digital signal. The attenuation coefficient of each pixel is calculated by an electronic computer, and the image is reconstructed, thereby displaying the tomographic structure of each part of the object to be imaged.

[0045] Below, the background technology of the embodiments of the present disclosure is described in detail by taking a slip-ring CT system in the prior art as an example.

[0046] Figure 1 FIG. 1 is a schematic structural diagram of a slip-ring type ray scanning imaging system according to some exemplary embodiments of the prior art. Figure 1As shown, the slip-ring CT imaging system includes a gantry 40, a central imaging aperture 116, an imaging axis 114, support columns 31 and 33, a vertical rail 118, connecting mechanisms 201 and 203, a base 102, a horizontal guide rail 110, a first drive mechanism, a second drive mechanism, a table column 50, and a controller. The gantry 40 defines a central imaging aperture 116 and an imaging axis 114 extending through the central imaging aperture 116. The gantry 40 includes a housing and an interior cavity. The X-ray source and X-ray detector components are disposed within the housing and are rotatable about the housing of the gantry 40. The central imaging aperture 116 is the central portion of the gantry 40 and is used to accommodate the object to be imaged. The imaging axis 114 runs through the central imaging aperture 116 and defines the imaging direction. Support columns 31 and 33 are located on one side of the gantry 40 to support the gantry 40. Each support column is provided with at least one vertical rail 118 for vertical movement of the gantry 40. The support columns 31 and 33 can be connected to the gantry 40 through the connecting mechanisms 201 and 203. The vertical rail 118 is arranged along the length direction of the support columns 31 and 33 for the vertical movement of the gantry 40. The mating components on the connecting mechanisms 201 and 203 cooperate with the vertical rail 118 to achieve smooth movement of the gantry 40. The connecting mechanisms 201 and 203 are respectively installed on both sides of the gantry 40 and cooperate with the vertical rail 118 on the support columns 31 and 33 to achieve vertical movement of the gantry 40. The connecting mechanisms 201 and 203 allow the gantry 40 to tilt and rotate in different directions through the bearing assembly. Specifically, during the imaging process, the X-ray source component and the X-ray detector component rotate around the outer shell of the gantry 40 in the inner cavity of the gantry 40 to perform multi-angle scanning. At the same time, the gantry 40 can move in the vertical direction to achieve spiral scanning or layered scanning. For complex imaging requirements, the gantry 40 can also be tilted to a specific angle to perform tilt axis scanning. The collected imaging data is transmitted to the image processing unit via the data transmission system and processed to generate high-quality two-dimensional or three-dimensional images. After imaging is completed, the stage 40 returns to its original position and, if necessary, can be moved to a base or a chamber in the floor for safe storage.

[0047] In this embodiment, a first drive mechanism is used to drive the frame 40 in a vertical direction relative to the support columns 31 and 33. This mechanism may include a traction drive, a gear system, a belt drive, a pulley, a drive wheel, etc. The first drive mechanism is controlled by a controller that receives position feedback signals (such as those provided by a linear encoder) to precisely control the displacement of the frame 40.

[0048] Furthermore, a second drive mechanism is used to drive support columns 31 and 33 to move along the horizontal guide rails on base 102. This mechanism may include a traction drive, a gear system, a belt drive, a pulley, a drive wheel, etc. The second drive mechanism is controlled by a controller, which receives position feedback signals to accurately control the displacement of support columns 31 and 33.

[0049] The controller is used to control the operation of the first drive mechanism and the second drive mechanism, thereby accurately controlling the vertical and horizontal displacements of the frame 40. The controller receives position feedback signals from sensors such as linear encoders to ensure accurate movement of the frame 40.

[0050] The applicant's research has revealed that the imaging process of traditional slip-ring computed tomography (CT) devices suffers from significant efficiency and accuracy bottlenecks. The core of this bottleneck lies in the mechanism for acquiring projection data: the structure relies on physically rotating the radiation source (X-ray tube) and detector array to obtain comprehensive, multi-angle projection data around the scanned object. However, the speed of this physical rotation process is limited by the mechanical structure's motion capabilities. Specifically, before acquiring projection data at each angle, the radiation source and detector must be precisely moved to a preset position and stabilized, which consumes considerable time and results in relatively slow imaging speeds for slip-ring CT devices.

[0051] This speed limitation becomes a serious constraint in many application scenarios. For example, in clinical diagnosis in the emergency room and when dealing with life-threatening emergencies such as multiple injuries, acute stroke or myocardial infarction, fast imaging is crucial for rescuing patients, but the imaging speed of slip-ring CT devices may not be able to meet the time-sensitive emergency medical needs. For example, for pediatric patients or patients who cannot remain still for long periods of time, longer scanning times may cause motion artifacts, affecting image quality and diagnostic accuracy. For example, in cardiac imaging, traditional CT may have difficulty capturing accurate images of the rapid movement of the heart, limiting its application in the diagnosis of coronary artery disease. Due to its inherent mechanical limitations, slip-ring CT devices have long imaging times, which may delay treatment in emergency situations and increase the risk to patients.

[0052] To further complicate matters, the slip ring structure is inevitably affected by mechanical vibration and speed fluctuations during rotation. This not only leads to inconsistent data acquisition during scanning, but can also cause image blur and reduced resolution. High-resolution images are crucial for accurate diagnosis and meticulous industrial inspections, and the image quality degradation caused by mechanical vibration can lead to inaccurate inspection results, or even missed or false detections.

[0053] Furthermore, slip ring-based devices experience increased mechanical wear and maintenance requirements over long periods of operation, potentially negatively impacting their reliability and service life. This further increases operating costs, especially in high-use environments. As complex mechanical components, slip rings require precise engineering and high-quality materials to ensure long-term, stable operation. However, even with the most advanced technology, slip rings still face the inevitable wear and tear. Over time, the contact surfaces of slip rings may develop minute irregularities or damage, potentially leading to image quality degradation and system failure, increasing downtime and repair frequency. Furthermore, slip ring maintenance and replacement typically require specialized technicians, increasing not only direct maintenance costs but also the potential for additional opportunity costs due to device downtime. In remote or resource-limited medical facilities, obtaining timely repair services can be even more challenging, further limiting device availability.

[0054] To overcome these issues, researchers have begun exploring new imaging solutions using multiple distributed radiation sources. By sequentially exposing the image, mechanical motion is completely avoided, increasing imaging speed without sacrificing image quality.

[0055] Figure 2The following is a schematic diagram of the structure of a distributed X-ray source for a X-ray scanning imaging system according to some exemplary embodiments of the present disclosure. A distributed X-ray source includes multiple targets (also called focal points) and utilizes carbon nanotube (CNT) cathode technology. Compared to traditional single X-ray sources, this allows for the placement of multiple independent X-ray emission points at different locations within a single X-ray tube. These targets can each independently and controllably generate X-rays. For example, the distributed X-ray source developed by the applicant can integrate several, dozens, or even hundreds of X-ray targets within a single X-ray tube, each of which can be independently controlled and rapidly switched as needed. For example, the emission from each target can be precisely controlled, including parameters such as radiation intensity and emission time. This allows for flexible adjustment of radiation output during CT scans based on factors such as the scan area and object density, resulting in higher-quality images. For example, by controlling the radiation intensity at different targets, the intensity distribution of the X-ray beam can be modulated to suit the imaging requirements of different objects. For another example, the use of a multi-target distributed X-ray source can achieve rapid scanning and imaging capabilities. Because multiple radiation targets are set up, the distributed radiation source can scan the target object simultaneously or quickly in sequence from multiple different positions, greatly improving the scanning speed. Compared with traditional CT scanning methods, the distributed radiation source can obtain complete image information of the object in a shorter time, which is of great significance for scenarios that require rapid imaging, such as medical emergency and security inspection. For example, high-quality imaging effects can be achieved. The coordinated work of multiple targets and precise control capabilities enable the distributed radiation source to provide higher resolution and lower noise images. When imaging complex objects or tiny structures, the internal structure and details of the object can be presented more clearly, providing more accurate information for doctors' diagnosis or other application scenarios.

[0056] It should be noted that the distributed ray source is described here using an X-ray generating tube using a cold cathode carbon nanotube as an example, but the embodiments of the present disclosure are not limited to this form of X-ray generator, and distributed ray sources of other suitable structures can be applied to the imaging system provided by the embodiments of the present disclosure.

[0057] The applicant has also found through research that due to the fixed nature of the slip ring structure, it has limitations in applications that require complex scanning in a limited space. For example, Figure 1 The CT imaging device shown has a complex mechanical structure. The integration and coordinated operation of these components require a large amount of space, which increases the size and weight of the device and limits its application in small spaces, such as mobile CT, operating rooms and other space-constrained environments.

[0058] Furthermore, existing scanning solutions using distributed light sources still have limitations in operational flexibility and applicability, making it difficult to adapt to scanning objects in different positions or states. For example, in the field of medical device technology, it is necessary to support patients in both weight-bearing and non-weight-bearing positions to perform multi-state scanning of lesions. Distributed light source scanning solutions proposed in related technologies still use a fixed scanning bed and preset scanning parameters, making them unable to flexibly adapt to these two different positions.

[0059] In addition, how to combine the distributed light source scanning solution with specific application scenarios to effectively improve the system's space utilization, for example, saving ground space in a smaller space and achieving more flexible scanning operations, is also a technical challenge that needs to be solved urgently.

[0060] Based on this, an embodiment of the present disclosure proposes an imaging system, comprising: M distributed ray sources, wherein at least one distributed ray source includes q target points, and the q target points are configured to be activated in a predetermined order to emit rays, where M is a positive integer and q is a positive integer greater than or equal to 2; a detector, the detector being used to detect rays emitted from the M distributed ray sources and passing through a scanned object; a lifting structure, wherein the M distributed ray sources are connected to the lifting mechanism, and the lifting mechanism is used to drive the M distributed ray sources to move along a first direction; an imaging bracket, the imaging bracket being used to support the scanned object; and a detector bracket being used to support the detector, the detector bracket being connected to the imaging bracket. Driven by the lifting mechanism, the M distributed ray sources can form a scanning space with the detector surrounding at least a portion of the scanned object to scan and image the scanned object, and during the scanning and imaging process, the M distributed ray sources and the detector are arranged relative to each other in the radial direction of the scanning space.

[0061] In this embodiment, a configuration of distributed radiation sources and multiple targets, combined with a lifting structure and an imaging bracket, can achieve rapid scanning and imaging of the scanned object in different states; at the same time, the design of the lifting structure effectively reduces the floor space occupied and optimizes the space utilization of the medical clinic; in addition, the system also supports precise radiation projection when the scanned object is not moving, further providing a more comprehensive and precise projection position, and expanding its scope and flexibility in clinical applications.

[0062] The following describes the embodiments of the present disclosure in detail using a medical device application scenario where the scanning object is a patient. It should be understood that the imaging system described below for use in a medical device application scenario where a patient is scanned is merely an exemplary imaging system structure for ease of illustration. Those skilled in the art should understand that the embodiments of the present disclosure are not limited to medical device applications and are applicable to a variety of scanning and imaging scenarios.

[0063] Figure 3 A schematic perspective view of an imaging system according to some exemplary embodiments of the present disclosure is shown. Figure 4 According to some exemplary embodiments of the present disclosure, Figure 3 Cross-sectional view of the imaging space in the imaging system. Figure 5A Some exemplary embodiments of the present disclosure are based on Figure 3 Front view of the imaging system. Figure 5B Some exemplary embodiments of the present disclosure are based on Figure 3 Side view of the imaging system. Figure 6A Schematic diagram showing a linear arrangement of q target points according to some exemplary embodiments of the present disclosure; Figure 6B A schematic diagram showing a matrix arrangement of q target points according to some exemplary embodiments of the present disclosure is shown.

[0064] Reference Figure 3 In some exemplary embodiments, the imaging system 200 may include: M distributed ray sources 210, wherein at least one distributed ray source 210 includes q targets, and the q targets are configured to be activated in a predetermined order to emit rays, where M is a positive integer and q is a positive integer greater than or equal to 2; a detector 220, the detector 220 is used to detect rays emitted from the M distributed ray sources 210 and passing through the scanning object 250; a lifting structure 230, the M distributed ray sources 210 are connected to the lifting mechanism 230, and the lifting mechanism 230 is used to drive M distributed ray sources 210 to move along a first direction; an imaging bracket 240, the imaging bracket 240 is used to support a scanning object 250; and a detector bracket 260, is used to support a detector 220, the detector bracket 260 is connected to the imaging bracket 240, wherein the M distributed ray sources 210, driven by the lifting mechanism 230, can form a scanning space around at least a portion of the scanning object 250 with the detector 220 to scan and image the scanning object 250, wherein, during the scanning imaging process, the M distributed ray sources 210 and the detector 220 are arranged relative to each other in the radial direction of the scanning space.

[0065] Combined with reference Figure 6A and Figure 6B In the same distributed radiation source, q targets can be arranged along a first straight line or in a first matrix. Different arrangements affect the radiation distribution and imaging quality.

[0066] It should be noted that the "interval" here refers to the distance or relative position between the elements in the first straight line or the first matrix. The q target points are arranged in the order of the elements in the first straight line or the first matrix.

[0067] Continue to refer to Figure 6A, the targets arranged in a straight line, the distribution of their rays in space is along a straight line or a fan-shaped area. The targets arranged in a straight line have a simple structure, are easy to manufacture and control, and are suitable for scenarios where the scanning angle coverage range is not demanding. The entire ray source can be moved by a linear drive mechanism (such as a lead screw, a slide rail, etc.), or the emission angle of each target can be adjusted individually. Furthermore, the targets arranged in a straight line can be evenly spaced, that is, q targets are evenly distributed on a straight line, which can provide uniform angular coverage. Alternatively, the targets arranged in a straight line can also be non-uniformly spaced, that is, q targets are non-uniformly distributed on a straight line, which can provide higher angular resolution within a specific angle range according to scanning requirements.

[0068] Continue to refer to Figure 6B , the targets arranged in a matrix provide a larger scanning angle coverage and higher angular resolution, which is suitable for scanning objects with complex shapes or large sizes. It can be controlled based on a two-dimensional drive mechanism to control the position or angle of each target in the row and column directions respectively. Furthermore, the targets arranged in a matrix can be arranged in a regular matrix, that is, q targets are arranged in regular rows and columns, such as a rectangular or square matrix. Alternatively, the targets arranged in a matrix can also be arranged in an irregular matrix, that is, q targets are arranged in an irregular shape, which can be customized according to scanning requirements. Among them, the number of rows (n) and columns (m) of the first matrix can be determined based on the specific application of the distributed ray source, and the position of the target can be represented by the index of the matrix. For example, the position of target i can be expressed as (r i , c i ), where r i ∈{0,1,…,n-1},c i ∈{0,1,…,m-1}.

[0069] It should be noted that the linear and matrix target arrangements described herein are merely examples for describing a distributed radiation source. However, the embodiments of the present disclosure are not limited to these target arrangements. Other suitable arrangements, such as circular and spiral arrangements, can also be applied to the imaging system provided by the embodiments of the present disclosure. Those skilled in the art will appreciate that the specific target arrangement selected depends on the requirements of the imaging task, such as the shape and size of the scanned object, and the required imaging resolution.

[0070] Continue to refer to Figure 3 and Figure 5A 、 Figure 5B The lifting mechanism 230 includes a lifting end 2310, a fixed end 2320, a transmission system and a driving device (not shown in the figure). The lifting end 2310 is configured to be able to move along a first direction, for example, Figure 35 shows vertical movement. Those skilled in the art will appreciate that the first direction is not limited to the vertical direction, and can also be adjusted according to actual application requirements, such as an inclined direction or other directions.

[0071] In this embodiment, the fixed end 2320 is fixedly connected to the first fixed structure. For example, the fixed end 2320 can be fixed to the first fixed structure by bolts, welding, or other connection methods to ensure that it is firmly connected to the first fixed structure and provides stable support. The drive device is used to provide the power required to drive the lifting end to move. For example, the drive device can be a motor (such as a DC motor, AC motor, stepper motor, or servo motor), a hydraulic cylinder, an air cylinder, or other suitable power source. The transmission mechanism is used to transmit the power of the drive device to the lifting end to convert the rotational motion into linear motion. For example, this can be achieved through screw drive, gear drive, belt drive, etc.

[0072] In some exemplary embodiments, the first fixed structure can be a building ceiling, suspended ceiling, beam, or any other structure that can provide sufficient support and stability and guide the vertical linear motion of the lifting end 2310. The selection of the first fixed structure should be determined based on the actual application scenario and installation conditions, and ensure that it can withstand the weight of the lifting mechanism 230 and its connected components and the forces generated during movement.

[0073] Continue to refer to Figure 3 、 Figure 5A and Figure 5B According to the embodiment of the present disclosure, the lifting mechanism 230 further includes a first tray 2330. The first tray 2330 is connected to the lifting end 2310, and is used to carry M distributed radiation sources 210. The first tray 2330 may include a full-ring tray and a partial-ring tray. Among them, the full-ring tray includes a tray area of ​​the entire circumference, which can carry as many distributed radiation sources as possible, so that the scanned object can be imaged evenly throughout the entire circumference. The partial-ring tray includes a tray area of ​​a partial circumference, which can improve imaging efficiency and reduce costs for scanned objects of specific shapes or sizes. For example, if the scanned object is a long strip or an object with a non-circular cross-section, the use of a partial-ring tray can avoid redundant imaging of unnecessary areas, thereby reducing scanning time and resource consumption. At the same time, the partial-ring tray is also more suitable for use in space-constrained environments.

[0074] Those skilled in the art should understand that the selection of a full-ring or partial-ring tray depends on the characteristics of the scanned object and the requirements of the imaging task, and factors such as imaging coverage, efficiency, and cost need to be weighed to make the optimal choice.

[0075] In some exemplary embodiments of the present disclosure, the detector bracket 260 includes a second tray 2610 for carrying the detector 220, and the detector 220 is connected to the second tray 2610. The second tray 2610 can be a fixed or adjustable bracket for fixing the X-ray detector in a specific position. The second tray 2610 can be a single bracket or a multi-layer bracket for supporting single / multiple and / or single-layer / multi-layer detectors. The second tray 2610 can be equipped with an adjustable mechanism, such as a rotation axis, a tilt adjustment device or a lifting structure, so that the angle and position of the detector 220 can be precisely adjusted according to actual needs to meet the detection requirements in different environments.

[0076] To ensure that the detector 220 is securely mounted on the second tray 2610, the second tray 2610 may be equipped with a variety of connection devices. In some exemplary embodiments of the present disclosure, bolt connections, screw fixations, or snap-fit ​​connections may be used to ensure that the detector 220 remains stable during operation and prevent positional displacement due to vibration or external impact.

[0077] In some exemplary embodiments of the present disclosure, the connection between the detector 220 and the second tray 2610 may also adopt a standardized interface, such as a guide rail connection, a slot installation, or a threaded connection, etc. The standardized interface facilitates the rapid installation and removal of the detector 220 and improves the maintenance efficiency of the equipment.

[0078] Continue to refer to Figure 5A and Figure 5B To achieve precise alignment between the detector 220 and the radiation source 210, a first stopper 2331 is provided on the first tray 2330, and a second stopper 2611 is provided on the second tray 2610. The second stopper provides mechanical support, ensuring the stability of the scanning device during operation and preventing vibration and displacement from affecting the scanning results.

[0079] Continue to refer to Figure 3 Driven by the driving device, the first limiting device 2331 can move downward with the lifting end 2310 to cooperate with the second limiting device 2611, thereby limiting the M ray sources 210 and detectors 220.

[0080] The first limiting device 2331 and the second limiting device 2611 can be various types of limiting devices. In one exemplary embodiment, the first limiting device 2331 can include N positioning pins, and the second limiting device 2611 can include N positioning holes. The positioning pins and the positioning holes correspond one-to-one in their projected positions in the first direction. This ensures alignment between the first limiting device 2331 and the second limiting device 2611 during the movement of the M distributed radiation sources 210 driven by the lifting mechanism 230, thereby providing sufficient limiting stability and accuracy. N is a positive integer greater than or equal to 2.

[0081] In another exemplary embodiment, the first limiting device 2331 and the second limiting device 2611 can adopt a magnetic attraction structure. For example, magnetic elements are provided on the first tray 2330 and the second tray 2610 respectively, and the two are aligned and fixed by magnetic attraction. This method has the advantages of easy installation and no mechanical contact.

[0082] According to an embodiment of the present disclosure, when the first limiting device 2331 and the second limiting device 2611 are aligned, the M distributed ray sources and detectors can form a scanning space surrounding at least a portion of the scanned object 250. It should be noted that the scanning space refers to a spatial region enclosed by the ray sources and detectors in a specific geometric arrangement. Within this region, the rays emitted by the ray sources can penetrate the scanned object 250 and be received by the detectors, thereby acquiring projection data of the scanned object 250. The range of the scanning space is determined by the alignment position of the first limiting device 2331 and the second limiting device 2611 and the distribution range of the M distributed ray sources and detectors. The scanning space can cover the entire scanned object 250 or only a portion of the scanned object 250.

[0083] For example, the M distributed radiation sources and detectors can form an annular or arc-shaped scanning space surrounding the scanned object 250. Alternatively, a polygonal scanning space, such as a square or hexagon, can be formed to provide more flexible scanning angles. Those skilled in the art will appreciate that the number and positions of radiation sources and detectors can be adjusted according to specific needs to accommodate imaging objects of varying sizes and shapes.

[0084] In this embodiment, the scanning space includes an imaging plane. The imaging plane can be a specific cross-section within the scanning space and can be understood as a two-dimensional projection of the scanning space in a specific direction. It is a geometric concept. The imaging plane can be used to determine the relative position and angle between the radiation source and detector, thereby controlling the emission direction and reception path of the radiation. For example, the imaging plane can be parallel to or at a certain angle to the fixed structure.

[0085] It should be noted that, in conjunction with the reference Figure 3 and Figure 4 In order to conveniently describe the spatial relationship and movement direction between the various components in the embodiment of the present disclosure, a first direction z, a second direction x, a third direction y, a circumferential direction c and a radial direction r are set. Among them, the first direction z is represented as perpendicular to Figure 3 The direction of the fixed structure in Figure 4 The second direction x and the third direction y intersect, and the first direction z is perpendicular to both the second direction x and the third direction y. The circumferential direction c is denoted as the circumferential direction of the scanning plane, the radial direction r is denoted as the radial direction of the scanning plane, and the first direction z is perpendicular to both the circumferential direction c and the radial direction r.

[0086] Continue to refer to Figure 3 The imaging bracket 240 is used to stably support the scanned object 250, allowing it to remain stationary or move along a predetermined trajectory during the scanning process. The imaging bracket 240 may include a fixed frame that provides a stable support structure, and a positioning device that secures the scanned object in a specific position to prevent it from moving during the scanning process.

[0087] Continue to refer to Figure 3 、 Figure 4 and Figure 5A 、 Figure 5B For M distributed ray sources 210, M may be greater than 1, and the M distributed ray sources 210 are arranged in multiple straight arcs on the first tray 2330. The multiple arc arrangement can effectively expand the ray angle coverage, thereby achieving comprehensive imaging of the scan object 250.

[0088] Figure 7A The figure schematically shows a plurality of distributed ray sources arranged in a plurality of straight line arcs on a first tray according to some exemplary embodiments of the present disclosure. Figure 7B Schematic diagrams showing that a plurality of distributed ray sources are arranged in a plurality of straight line arcs on a first tray according to some other exemplary embodiments of the present disclosure are shown. Figure 7C The figure schematically shows a plurality of distributed ray sources arranged in an arc shape on a first tray according to some exemplary embodiments of the present disclosure. Figure 7D Schematic diagrams showing that a plurality of distributed ray sources are arranged in an arc shape on a first tray according to some other exemplary embodiments of the present disclosure are schematically shown.

[0089] In an exemplary embodiment, the M ray sources can be divided into several segments, each segment contains several ray sources, and each segment of ray sources is arranged along a straight line, but as a whole, these straight line segments are distributed in an arc shape in the circumferential direction c. For example, referring to Figure 7A, 6 ray sources are set up and arranged in three sections. Among them, each section of ray sources is arranged along a straight line, and the 6 ray sources are distributed in an arc shape along the circumferential direction c. Specifically, the first section contains 2 ray sources; the second section contains 2 ray sources; and the third section contains 2 ray sources. For example, refer to Figure 7B , the M ray sources can be divided into K segments, and the number of ray sources contained in each segment is m1, m2, ..., mK, where m1 + m2 + ... + mK = M.

[0090] In an exemplary embodiment, the ray sources may be evenly distributed along an arc, that is, the angular intervals between each ray source are equal. Figure 7C , 6 radiation sources are provided, and the 6 radiation sources are evenly distributed on the portion of the first tray 2330 along the circumferential direction c. For example, referring to Figure 7D , M radiation sources are evenly distributed on the portion of the first tray 2330 along the circumferential direction c. Specifically, the setting position of each radiation source can be calculated based on the radiation source length, the arc radius of the first tray 2330 and the total angle range required to be covered in the actual application scenario.

[0091] Continue to refer Figure 4 , you can define the start and end angles of each arc segment to cover the required ray angle range. For example, Figure 4 The dashed line in FIG represents the angular coverage of the M distributed radiation sources 210. In this embodiment, the angular coverage is greater than 180°. In other words, the imaging system can now cover most or all of the surrounding area of ​​the scanned object 260, thereby obtaining more complete and comprehensive information.

[0092] In some embodiments of the present disclosure, M can be equal to 1. In this case, the M distributed radiation sources 210 can be simplified to a single arc-shaped radiation source. A single arc-shaped radiation source is suitable for applications requiring a smaller coverage area or a simpler system structure. For example, for scanning objects of certain shapes or applications requiring rapid imaging, a single arc-shaped radiation source can meet the requirements and simplify system design.

[0093] In some embodiments of the present disclosure, the ray angle coverage of the M distributed ray sources 210 may be less than 180°. A coverage of less than 180° allows for the concentration of imaging resources on a specific area, which is suitable for applications requiring high-resolution imaging of a specific area, thereby improving the imaging accuracy of that area. For example, if a portion of the scanned object requires higher resolution, a ray angle coverage of less than 180° may be selected.

[0094] Continue to refer to Figure 4, the ray receiving angle coverage of the detector 220 is greater than the ray angle coverage. In other words, the detector 220 can receive rays within a wider range of angles than the rays emitted by the ray source, thereby ensuring that all rays emitted by the ray source and passing through the scanned object are detected, thereby obtaining a complete and comprehensive image as much as possible.

[0095] In embodiments of the present disclosure, the detectors can be arranged in an arc shape. Specifically, corresponding to the segmented linear arrangement of the radiation sources, the detectors can also be divided into corresponding segments, with each segment arranged along a straight line, forming a point-to-point or area-covering detection path with the corresponding radiation source segment. Corresponding to the uniform arc distribution of the radiation sources, the detectors can be evenly distributed along an arc, forming a point-to-point or area-covering detection path with the radiation sources. The detectors can be a linear array detector composed of one-dimensional detectors, a multi-layer detector composed of multiple rows of detector units, or a surface detector.

[0096] Furthermore, the detectors can be optimally arranged according to the shape and position of the scanning space, for example, more detectors can be set near the center of the scanning space, or the density of the detectors can be adjusted according to the shape of the scanning space.

[0097] It should be noted that the "center position" herein refers to the geometric center of the arc formed by the radiation source and detector and / or the area radially extended outward by a predetermined distance from the area containing the geometric center. To ensure that the radiation uniformly covers the region of interest of the object to be imaged and avoid loss of edge data, the scanned object or its region of interest can be set to be at this center position.

[0098] Figure 8A A schematic diagram illustrating the positional relationship between a distributed radiation source and a first tray according to some exemplary embodiments of the present disclosure is shown. Figure 8B Schematic diagrams showing the positional relationship between a distributed radiation source and a first tray according to some other exemplary embodiments of the present disclosure.

[0099] Combined with reference Figure 8A and Figure 8B The first pallet 2330 includes a first side and a second side arranged opposite to each other in the first direction z, and the first side is on the side away from the second pallet 2610; the second pallet 2610 includes a third side and a fourth side arranged opposite to each other in the first direction z, and the fourth side is on the side away from the first pallet 2330.

[0100] Continue to refer to Figure 8AM distributed radiation sources 210 are arranged on the first side, and detectors 220 are arranged on the fourth side. In this case, the radiation source and detector components have a certain axial offset or angular difference in the first direction z, that is, the radiation sources and detectors are arranged in staggered layers. An inclination of the imaging plane with respect to the fixed structure provides greater 3D scanning capabilities and allows for the acquisition of projection data from a wider range of angles, facilitating 3D reconstruction. To ensure that the radiation accurately reaches and is effectively received by the detector, the radiation source angle must be adjusted.

[0101] Adjusting the source angle requires considering the geometric relationships in three-dimensional space to ensure that the rays can accurately pass through the scanned object and be effectively received by the detector. For example, the source's tilt angle can be dynamically adjusted based on the offset position between the source and the detector and the cone angle of the beam emitted from the source's focal point to ensure that the cone angle of rays emitted from each focal point of the source completely covers the height of the detector along the first direction z. The cone angle of the beam emitted from the source's focal point refers to the divergence angle of the X-ray beam emitted from the source.

[0102] Specifically, a collimator can be set at the target outlet of each of the q target points, and the collimator can be used to control the shape and size of the beam of rays emitted by each target point based on the first angle, so that the propagation path of the ray in three-dimensional space can be accurately controlled so that it can pass through the scanned object and reach the detector; alternatively, the M distributed ray sources can be tilted as a whole according to the first angle so that the ray beam can intersect with the detector.

[0103] Continue to refer to Figure 8B , M distributed radiation sources are arranged on the second side, and the detectors are arranged on the fourth side. In this case, the multiple targets of the distributed radiation sources and at least a portion of the detectors are located in the same imaging plane, which is parallel to the fixed structure. This "coplanar" design can reduce geometric distortion caused by ray path deviation and improve the geometric accuracy of the image. Because the ray path is relatively direct, it can reduce radiation attenuation and scattering, improving the signal-to-noise ratio of the image. However, its 3D scanning capability is limited and requires high alignment accuracy.

[0104] It should be noted that, in this article, unless otherwise specified, expressions such as "coplanar", "located in the same imaging plane" and other similar expressions not only include two components (such as a ray source and a detector) being located in the same plane in a geometric sense, but also include two components (such as a ray source and a detector) being located in the same plane in an engineering sense. For example, the plane in which the two components are located may have a certain thickness, and the thickness of the plane may be determined by the size of the components, for example, it may be determined by the size of the target point of the ray source along the first direction z, or it may be determined by the size of the detector along the first direction z.

[0105] Furthermore, in order to obtain oblique images at specific positions or facilitate subsequent operations and processing, the embodiments of the present disclosure also provide a solution in which multiple targets and detectors are located in the same imaging plane and are tilted as a whole relative to the reference plane.

[0106] It should be noted that the "reference plane" here can be understood as a reference plane that serves as a reference for measuring the angle of the tilted imaging plane. It is pre-set and associated with the coordinate system of the device or system. In the embodiments of the present disclosure, the reference plane can be defined as a plane perpendicular to the first direction z or the direction of gravity, that is, a horizontal plane.

[0107] Figure 9 A schematic diagram showing a case where the same imaging plane in which multiple targets and detectors are located is tilted relative to a reference plane according to some exemplary embodiments of the present disclosure.

[0108] refer to Figure 9 The imaging plane is tilted relative to a reference plane perpendicular to the first direction. In other words, there is an angle between the position of the imaging plane in space and the reference plane.

[0109] The tilted imaging plane allows scanning data to be acquired at non-orthogonal angles, thereby achieving oblique scanning of the scanned object. For example, in the field of medical imaging, especially when it is necessary to bypass certain anatomical structures to reduce overlap, oblique images can be used to better observe and evaluate the structure of joints, bones or blood vessels. Specifically, in cardiovascular imaging, oblique angles can help doctors observe specific parts of the coronary arteries, which may be blocked by other tissues at conventional angles. For example, in industrial inspection applications, oblique imaging can provide more information than orthogonal viewing angles for irregularly shaped workpieces or tiny defects that can only be seen at specific angles. For example, for the inspection of aircraft engine blades, oblique imaging may help reveal tiny cracks on the edges or joints of the blades.

[0110] In addition to medicine and industry, tilted imaging planes can also be used in security inspections, archaeology, construction engineering, and geological exploration. In these applications, oblique scanning helps observe and analyze objects from different angles, providing more multidimensional information to assist decision-making and research.

[0111] Furthermore, when there are spatial limitations in the first direction, a tilted imaging plane can expand the imageable area. The physical tilt of the imaging plane can be achieved by adjusting the position of the target and the detector through a mechanical structure.

[0112] Specifically, the tilting of the imaging plane can be achieved by the pivot structure 400. Specifically, the pivot structure includes: a first pivot structure 410 and a second pivot structure 420. The first pivot structure 410 is used to pivotally connect the first tray 2330 to the lifting mechanism 230, and enable the first tray 2330 to rotate around the axis of the first pivot structure 410, thereby changing the incident angle of the radiation source. Specifically, the rotation method can be single-axis rotation, for example, using a hinge or bearing to achieve rotation around a single axis; or the rotation method can be multi-axis rotation, for example, using a spherical joint or a universal joint to achieve rotation around multiple axes, providing greater degrees of freedom.

[0113] Similar to the first pivot structure 410, the second pivot structure 420 is pivotally connected to the second tray 2610 and enables the second tray 2610 to rotate about the axis of the second pivot structure 420, thereby changing the receiving angle of the detector. Accordingly, the rotation can be achieved using a single-axis rotation mechanism or a multi-axis rotation mechanism.

[0114] In the embodiments of the present disclosure, an electronic control system can be used to control the first pivot structure 410 and the second pivot structure 420 to rotate the first tray 2330 and the second tray 2610 to a predetermined angle, respectively, to achieve tilt control of the imaging plane and support more flexible scanning modes. The two pivot structures can be controlled synchronously or independently to achieve precise adjustment of the ray projection and reception angles.

[0115] Furthermore, if multiple targets and detectors are located in the same imaging plane and the detector's radiation reception angle coverage is larger than the radiation source's radiation angle coverage, the detector module will inevitably block some of the radiation emitted by the radiation source, thereby affecting imaging quality. To prevent the detector from blocking the radiation source, a "detector gap-jointed arrangement" can be adopted. In other words, the detector units are not arranged closely together, but rather have a certain gap. These gaps allow radiation to pass through and reach the scanned object, thus avoiding image defects caused by blockage.

[0116] The slit width, or the spacing between detector elements, is not arbitrarily set but is determined by the X-ray cone angle. The slit width needs to be large enough to ensure that all X-rays within the cone angle can pass through and reach the scanned object, while also being small enough to maximize detector coverage and imaging resolution.

[0117] Figure 10A 1 is a side view of a ray scanning system according to some exemplary embodiments of the present disclosure, wherein the first limiting device and the second limiting device cooperate to limit the position. Figure 10B is a side view of a ray scanning system according to some exemplary embodiments of the present disclosure, wherein the first limiting device and the second limiting device are out of position.

[0118] It should be noted that, in the absence of conflict, the contents and features described above can be combined with the various embodiments described below. In order to save space, the various embodiments below will not be described repeatedly.

[0119] The embodiment of the present disclosure further provides a ray scanning system 300, comprising: M distributed ray sources 310, wherein at least one distributed ray source includes q target points, and the q target points are configured to be activated in a predetermined order to emit rays, where M is a positive integer and q is a positive integer greater than or equal to 2; a detector 320, configured to detect rays emitted from the M distributed ray sources 310 and passing through a scanned object, and to generate projection data based on the detected rays; a lifting structure 330, wherein the M distributed ray sources 310 are connected to the lifting mechanism 330, and the lifting mechanism 330 is configured to drive the M distributed ray sources 310 to move along a first direction; an imaging bracket 340, wherein the imaging bracket 340 is configured to support the scanned object 350, and the imaging bracket 340 is configured to support the scanned object 350. 0 is configured to be movable along a first direction; a detector bracket 360 for supporting the detector 320, the detector bracket 360 being connected to the imaging bracket 340, wherein the M distributed ray sources 310 and the detector 320 are driven by the lifting mechanism to form a scanning space around at least a portion of the scanning object 350, so as to perform scanning imaging on the scanning object 350 that can be in at least two different states, wherein, during the scanning imaging process, the M distributed ray sources 310 and the detector 320 are relatively arranged in a radial direction of the scanning space; and a radiation device 370, the radiation device 370 is used to deliver a predetermined dose of radiation to the target area according to the projection data when the scanning object 350 is stationary.

[0120] In this embodiment, the imaging bracket 340 can be designed as a multifunctional platform, such as a medical chair. The adjustment mechanism can include an electric or mechanical lift system to vertically adjust the seat cushion height of the medical chair. Furthermore, the imaging bracket 340 can also be configured to include a tilt function to accommodate different imaging postures and angles (e.g., weight-bearing and non-weight-bearing postures). Specifically, the adjustment mechanism can be equipped with precision sensors and control systems to ensure smooth adjustment and accurate positioning, which is particularly important for imaging requiring specific postures (e.g., spinal imaging under weight-bearing conditions).

[0121] Specifically, the imaging bracket 340 may include a platform 3411 and a lifting platform 3412. The lifting platform 3412 supports the platform 3411 to move along the first direction z, and is used to adjust the height of the platform 3411 in the first direction z. The platform 3411 is a plane that is in direct contact with the patient or the scanned object, and is designed to safely and comfortably support patients of various sizes. Its surface can be made of special materials to ensure the comfort of the patient without interfering with the X-ray imaging. The lifting platform 3412 allows the operator to accurately adjust the height of the platform 3411 in the vertical direction to accommodate patients of different heights or meet specific imaging needs. The lifting platform 3412 can use an electric hydraulic system or a precise mechanical transmission device to ensure that the movement process is smooth and precise, and to avoid any vibration that may affect the image quality.

[0122] In an embodiment of the present disclosure, the object support table 3411 and the lifting table 3412 can enhance the flexibility and applicability of the system. For example, when performing a standing weight-bearing scan, the object support table 3411 can be adjusted to a lower position to facilitate the patient to stand; and when performing a sitting weight-bearing scan, the object support table 3411 can be adjusted to a higher position to facilitate the patient to sit down. In addition, the imaging bracket 340 can also optimize the distance between the radiation source and detector and the patient to obtain the best image quality. In some cases, this adjustment capability can reduce unnecessary radiation dose while maintaining image quality.

[0123] Continue to refer Figure 10A and Figure 10B , the radiation device 370 is relatively independent of the imaging bracket 340 and the lifting structure 330, that is, the movement of the imaging bracket 340 will not affect the stability of the imaging bracket 340 and the lifting structure 330. The radiation device 370 may include a radiation head 3710 and a fixed support 3720. Specifically, the fixed support 3710 has an extended structure, including a first end 3711 and a second end 3712 arranged opposite to each other along a first direction z, the second end 3712 is connected to the second fixed structure, and the second end 3712 is set to be spaced a preset distance from the imaging bracket 340 in the second direction x. The length of the fixed support 3711 extending in the first direction z is set according to the specific application scenario to ensure that the radiation head and the imaging bracket maintain a suitable distance and relative position, which not only facilitates the conduct of radiotherapy but also does not interfere with CT scanning.

[0124] In the disclosed embodiment, the second fixing structure provides a stable support for the fixing pillar, and can be the ground or a base of the radiation device 370. The base can be fixed to the ground or other stable structure to ensure the overall stability of the radiation device and avoid any shaking or displacement that may affect the treatment accuracy.

[0125] In this embodiment, the radiation head 3710 is fixedly connected to the first end 3711, and a collimation system is provided at the outlet of the radiation head 3710. The collimation system is used to collimate the radiation beam emitted by the radiation head to the target area. The radiation head 3710 is a component that generates and emits radiation, and contains a device that generates radiation, such as a radioisotope source or a small linear accelerator. The main function of the collimation system is to limit the shape and size of the radiation beam so that it can accurately irradiate the target area while minimizing radiation to surrounding healthy tissues. It is usually composed of a series of lead blades or other high-density materials, and the shape and size of the radiation beam can be adjusted according to treatment needs.

[0126] Continue to refer Figure 10A and Figure 10B Based on whether direct radiotherapy is required, the imaging and scanning method of the ray scanning system may include a vertical scanning mode (S111-S115) and an oblique scanning mode (S121-S126).

[0127] Among them, the vertical scanning mode may include: in operation S111, in response to the scan object standing or sitting on the scanning chair, the lifting end can be moved along the first direction so that the first limit device set on the ring tray is aligned with the second limit device set on the detector bracket to form a detection space around the scan object.

[0128] In operation S112, q target points in at least one distributed ray source among the M distributed ray sources are activated to emit rays in a predetermined order.

[0129] In operation S113 , a detector array is used to detect rays emitted from the M distributed ray sources and passing through the scan object, and projection data is generated according to the detected rays.

[0130] In operation S114 , the lifting end is moved along a first direction so that a first limiting device provided on the annular tray is separated from a second limiting device provided on the detector bracket.

[0131] In operation S115 , based on the projection data, the radiation device is controlled to deliver a predetermined dose of radiation to the target area.

[0132] The tilt scanning mode may include: in operation S121, in response to the scan object standing or sitting on the scanning chair, determining the target tilt angle of the annular tray and the detector bracket, wherein the target tilt angle is determined based on the range of the radiation beam emitted by the radiation head without blocking the annular tray and the detector bracket.

[0133] In operation S122 , the annular tray and the detector bracket are tilted to the target tilt angle relative to a reference plane perpendicular to the first direction.

[0134] In operation S123, the lifting end is moved along a first direction so that a first limiting device provided on the annular tray is aligned with a second limiting device provided on the detector bracket, thereby forming a detection space surrounding the scan object.

[0135] In operation S124 , q target points in at least one distributed ray source among the M distributed ray sources are activated to emit rays in a predetermined order.

[0136] In operation S125 , the detector array is used to detect rays emitted from the M distributed ray sources and passing through the scan object, and projection data is generated according to the detected rays.

[0137] In operation S126 , based on the projection data, the radiation device is controlled to deliver a predetermined dose of radiation to the target area.

[0138] As can be seen, the tilted scanning mode (S121-S126) adds the step of adjusting the tilt angle of the ring tray and detector holder compared to the vertical scanning mode (S111-S115). This pre-adjustment prevents the scanning device from blocking the radiotherapy beam, thus achieving a seamless transition between scanning and treatment, improving efficiency and adapting it to a wider range of clinical scenarios.

[0139] Figure 11 A block diagram of an electronic device suitable for implementing the above-described method according to an embodiment of the present disclosure is schematically shown. Figure 11 The electronic device shown is only an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0140] like Figure 11 As shown, the electronic device 1100 according to an embodiment of the present disclosure includes a processor 1101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1102 or a program loaded from a storage portion 1108 into a random access memory (RAM) 1103. The processor 1101 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 1101 may also include onboard memory for caching purposes. The processor 1101 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.

[0141] Various programs and data required for the operation of the electronic device 1100 are stored in the RAM 1103. The processor 1101, the ROM 1102, and the RAM 1103 are connected to each other via a bus 1104. The processor 1101 performs various operations of the method flow according to the embodiment of the present disclosure by executing the programs in the ROM 1102 and / or the RAM 1103. It should be noted that the programs may also be stored in one or more memories other than the ROM 1102 and the RAM 1103. The processor 1101 may also perform 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.

[0142] According to an embodiment of the present disclosure, electronic device 1100 may further include an input / output (I / O) interface 1105, which is also connected to bus 1104. Electronic device 1100 may also include one or more of the following components connected to I / O interface 1105: an input section 1106 including a keyboard, mouse, etc.; an output section 1107 including devices such as a cathode ray tube (CRT), liquid crystal display (LCD), and speakers; a storage section 1108 including a hard disk; and a communication section 1109 including a network interface card such as a LAN card or modem. Communication section 1109 performs communication processing via a network such as the Internet. A drive 1110 is also connected to I / O interface 1105 as needed. Removable media 1111, such as a magnetic disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed in drive 1110 as needed, so that computer programs read from the removable media can be installed into storage section 1108 as needed.

[0143] According to an embodiment of the present disclosure, the method flow according to an embodiment of the present disclosure can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 1109, and / or installed from the removable medium 1111. When the computer program is executed by the processor 1101, the above-mentioned functions defined in the system of the embodiment of the present disclosure are executed. According to an embodiment of the present disclosure, the system, equipment, device, module, unit, etc. described above can be implemented by a computer program module.

[0144] The present disclosure also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments, or may exist independently and not be incorporated into the device / apparatus / system. The computer-readable storage medium carries one or more programs, and when executed, implements the method according to the embodiments of the present disclosure.

[0145] According to embodiments of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium. Examples include, but are not limited to, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EEPROM 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 conjunction with an instruction execution system, apparatus, or device.

[0146] For example, according to an embodiment of the present disclosure, the computer-readable storage medium may include the ROM 1102 and / or the RAM 1103 described above and / or one or more memories other than the ROM 1102 and the RAM 1103 .

[0147] An embodiment of the present disclosure also includes a computer program product, which includes a computer program, and the computer program contains program code for executing the method provided by the embodiment of the present disclosure. When the computer program product runs on an electronic device, the program code is used to enable the electronic device to implement the method provided by the embodiment of the present disclosure.

[0148] When the computer program is executed by the processor 1101, the above functions defined in the system / device of the embodiment of the present disclosure are performed. According to the embodiment of the present disclosure, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0149] 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 1109, and / or installed from removable media 1111. 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.

[0150] 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, Java, C++, qython, "C" language, 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).

[0151] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, 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 part of the code, which contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the accompanying drawings. For example, two boxes shown 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, as well as the combination of boxes in the block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified functions or operations, or can be implemented using a combination of dedicated hardware and computer instructions. It will be understood by those skilled in the art that the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or coupled in various ways, and all of these combinations and / or couplings fall within the scope of the present disclosure.

[0152] The above describes the embodiments of the present disclosure. 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 advantageously used in combination. 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 ray scanning system, characterized in that: The ray scanning system comprises: M distributed ray sources, wherein at least one distributed ray source includes q target points, and the q target points are configured to be activated in a predetermined order to emit rays, M is a positive integer, and q is a positive integer greater than or equal to 2; a detector, configured to detect rays emitted from the M distributed ray sources and passing through the scanned object, and generate projection data based on the detected rays; A lifting structure, wherein the M distributed ray sources are connected to the lifting mechanism, and the lifting mechanism is used to drive the M distributed ray sources to move along a first direction; an imaging bracket, the imaging bracket being used to support the scan object, at least a portion of the imaging bracket being configured to be movable along a first direction; a detector bracket, configured to support the detector, the detector bracket being connected to the imaging bracket, wherein the M distributed radiation sources and the detector, driven by the lifting mechanism, can form a scanning space surrounding at least a portion of a scanned object, so as to perform scanning imaging on the scanned object that can be in at least two different states, wherein during the scanning imaging process, the M distributed radiation sources and the detector are arranged relative to each other in a radial direction of the scanning space; and A radiation device is used to deliver a predetermined dose of radiation to a target area according to the projection data when the scanned object is stationary.

2. The system according to claim 1, wherein: The at least two different states include a standing state and a sitting state.

3. The system according to claim 2, characterized in that The imaging bracket includes an object supporting platform and a lifting platform. The lifting platform supports the object supporting platform to move along a first direction and is used to adjust the height of the object supporting platform in the first direction.

4. The system according to claim 2 or 3, characterized in that The lifting mechanism comprises: a lifting end, the lifting end being configured to be movable along a first direction; a fixed end, the fixed end being fixedly connected to the first fixed structure; and A first tray is connected to the lifting end and is used to carry the M distributed ray sources.

5. The system according to claim 4, characterized in that The detector bracket includes a second tray, and the detector is connected to the second tray.

6. The system according to claim 5, characterized in that The first tray is provided with a first limiting device, and the second tray is provided with a second limiting device. The first limiting device and the second limiting device are configured to cooperate with each other to limit the M radiation sources and the detector.

7. The system according to claim 1 or 2, characterized in that The radiation device includes a radiation head and a fixed support. The fixing support comprises a first end and a second end oppositely disposed along a first direction, the second end being connected to a second fixing structure, and the second end being spaced apart from the imaging bracket by a predetermined distance in a second direction, the second direction being perpendicular to the first direction; The radiation head is fixedly connected to the first end, and a collimation system is provided at an outlet of the radiation head. The collimation system is used to collimate the radiation beam emitted by the radiation head to the target area.

8. The system according to claim 5 or 6, characterized in that The first tray includes a first side and a second side disposed opposite to each other in the first direction, the first side being upstream of the second side, and the second tray includes a third side and a fourth side disposed opposite to each other in the first direction, the third side being upstream of the fourth side; as well as The M distributed ray sources are arranged on the second side, and the detector is arranged on the fourth side.

9. The system according to claim 8, characterized in that The multiple target points of the distributed ray source and at least a portion of the detector are located in the same imaging plane, and the imaging plane is tilted at a target tilt angle relative to a reference plane perpendicular to the first direction, wherein the target tilt angle is determined based on the range of the ray beam emitted by the radiation head.

10. The system according to claim 9, characterized in that The imaging system further comprises: a first pivot structure for pivotally connecting the first tray to the lifting device; and A second pivot structure is provided for pivotally connecting the second tray to the imaging bracket.

11. The system according to claim 9, wherein: The diameter of the imaging plane is greater than or equal to 0.8 m.

12. The system according to any one of claims 1 to 3, 5 to 6, and 9 to 11, characterized in that: The first limiting device includes N positioning pins, and the second limiting device includes N positioning holes. The positioning pins and the positioning holes correspond one to one in terms of projection positions in the first direction, and N is a positive integer greater than or equal to 2.

13. The system according to any one of claims 1 to 3, 5 to 6, and 9 to 11, characterized in that: The ray receiving angle coverage range of the detector is greater than the ray angle coverage range of the M distributed ray sources, and the detector units of the detector are spliced ​​and arranged based on a preset interval, wherein the preset interval between the detector units is determined according to the ray cone angle size of q target points.

Images