Imaging system and method, radiotherapy system and electronic equipment

Abstract

The invention provides an imaging system and method, a radiotherapy system and electronic equipment, and relates to the technical field of medical treatment, in particular to the technical field of target region imaging. The imaging system is used for imaging a target object, and comprises a ray source used for emitting a beam to the target object; the detector is arranged opposite to the radiation source; the diagnosis and treatment bed is located between the radiation source and the detector, is fixed relative to the detector in position and is used for bearing and driving a target object to move; in the moving process of the diagnosis and treatment bed, the beam emitted by the radiation source is partially or completely coincided with the target area of the target object all the time, and the beam penetrating through the target area of the target object can be received by the detector. According to the imaging system disclosed by the invention, the equipment complexity can be reduced, the image of the target region of the target object in the moving process can be quickly and accurately obtained, and the position of the target region of the target object can be monitored in real time at multiple angles.

Description

Technical Field

[0001] The present disclosure relates to the medical field, in particular to the field of target imaging technology, and specifically to an imaging system and method, a radiotherapy system and electronic equipment. Background Art

[0002] With the rapid development of computer and imaging technology, image-guided therapy technology has played an increasingly important role in improving the accuracy of radiotherapy. These technologies have improved the local control rate of tumors and reduced the radiation dose to surrounding normal tissues, thereby reducing damage to normal tissues.

[0003] In order to overcome the positioning errors caused by organ movement (such as breathing) and changes in the position of the target object, and to accurately find the tumor tissue, real-time or near real-time imaging technology is used to locate the tumor during the treatment process, thereby reducing damage to healthy tissue and improving the treatment effect.

[0004] The existing image-guided imaging technologies mainly include cone beam CT imaging, dual-plate orthogonal imaging and magnetic resonance imaging. Among them, dual-plate orthogonal imaging is quasi-three-dimensional imaging with low imaging dose and fast imaging speed. However, the existing dual-plate orthogonal system requires two detectors located on both sides of the target object and two radiation sources arranged opposite to the two detectors, which increases the complexity of the equipment and occupies more space; in terms of angle, the angle of the existing dual-plate orthogonal imaging system is fixed, which not only limits the imaging angle, but also makes it difficult to obtain multi-perspective information in complex anatomical structures, and the field of view is limited, resulting in the inability to fully observe a large range of lesions or anatomical areas, and it is easy to miss important peripheral information, thereby affecting the accuracy of diagnosis; in addition, since the angle of the existing dual-plate orthogonal imaging system is not adjustable, it lacks multi-angle real-time imaging support and cannot cope with certain rapidly changing diagnostic needs; and when using the existing dual-plate orthogonal imaging system for imaging, the target object needs to maintain a specific posture more accurately, and the position requirements of the target object are high. Summary of the invention

[0005] The present disclosure provides an imaging system and method, a radiotherapy system and an electronic device. The imaging system of the present disclosure can reduce the complexity of the equipment, and can quickly and accurately obtain an image of a target area of ​​a target object in motion, and can realize real-time, multi-angle monitoring of the position of the target area of ​​the target object.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present disclosure provides an imaging system for imaging a target object, comprising:

[0008] A ray source, used to emit a beam to a target object;

[0009] A detector, arranged opposite to the radiation source;

[0010] A diagnostic bed, located between the radiation source and the detector, fixed relative to the detector, and used to carry and drive the target object to move;

[0011] During the movement of the diagnosis and treatment bed, the beam emitted by the ray source always partially or completely overlaps with the target area of ​​the target object, and the beam passing through the target area of ​​the target object can be received by the detector.

[0012] In some embodiments, the number of the ray sources may be multiple.

[0013] Preferably, central axes of beams from the plurality of ray sources intersect at an imaging point.

[0014] Preferably, the angle formed between the central axes of the beams of the multiple ray sources, the installation positions, arrangement directions and excitation sequences of the multiple ray sources can all be adjusted.

[0015] Preferably, the plurality of ray sources are arranged along the head-to-foot direction of the target object.

[0016] In some embodiments, the linear distance between the detector and the radiation source is adjustable.

[0017] In some embodiments, the diagnostic and treatment bed includes a bed board and a bed base, the bed board is fixed on the bed base, and the positions of the bed board and the detector are relatively fixed.

[0018] Preferably, the detector is arranged on the bed board.

[0019] In some embodiments, the bed board and the detector can reciprocate along the X-axis, Y-axis and Z-axis in the IEC coordinate system respectively.

[0020] In some embodiments, the imaging system may further include: an imaging control processing device, which can control the imaging system as described above to perform imaging based on an imaging mode selected by a user.

[0021] Preferably, the imaging method may include tomography, KV imaging or CBCT imaging.

[0022] In some embodiments, the size of the detector can be selected according to actual conditions. Preferably, the size of the detector is sufficient to cover the target area of ​​the target object.

[0023] In a second aspect, the present disclosure provides a radiotherapy system, which includes: an imaging system as described above; and radiotherapy equipment.

[0024] In some embodiments, the area where the beam emitted by the radiation source overlaps with the target area of ​​the target object and the treatment area of ​​the radiotherapy device always partially or completely overlap.

[0025] In some embodiments, during the movement of the diagnosis and treatment bed from the positioning reference point of the radiotherapy device to the radiotherapy isocenter, the imaging system monitors the position of the target area of ​​the target object, and the imaging point of the imaging system moves along the line connecting the positioning reference point and the radiotherapy isocenter;

[0026] Wherein, a line connecting the positioning reference point and the radiotherapy isocenter is parallel to the X-axis, Y-axis or Z-axis in the IEC coordinate system of the radiotherapy equipment.

[0027] In a third aspect, the present disclosure provides an imaging method, which is applied to the imaging system as described above, and the method includes: adjusting the radiation source so that during the movement of the diagnostic and treatment bed, the beam emitted by the radiation source always partially or completely overlaps with the target area of ​​the target object, and the beam passing through the target area of ​​the target object can be received by the detector to generate image data.

[0028] In some embodiments, the number of the radiation sources is multiple, and the adjustment may include one or more of the following:

[0029] adjusting the number of the radiation sources;

[0030] Adjusting the installation position of the radiation source;

[0031] Adjusting the arrangement direction of the ray sources;

[0032] adjusting the excitation sequence of the ray sources;

[0033] The angle formed between the central axes of the beams of the plurality of ray sources is adjusted.

[0034] In a fourth aspect, the present disclosure provides an electronic device, the electronic device comprising: a processor; a memory configured to store instructions executable by the processor;

[0035] The processor is configured to execute the instructions to implement the imaging method as described above.

[0036] In the imaging system provided by the present invention, the positions of the detector and the diagnosis and treatment bed are relatively fixed, which can achieve the purpose of reducing the complexity of the equipment, saving space and reducing the difficulty of operation. In addition, during the movement of the diagnosis and treatment bed, the beam emitted by the radiation source always partially or completely overlaps with the target area of ​​the target object, and the beam passing through the target area of ​​the target object can be received by the detector. This can eliminate the problem of frequent movement or angle adjustment of the detector in the traditional double-plate orthogonal system, simplify the imaging operation and reduce the imaging time, and can quickly and accurately obtain the image of the target area of ​​the target object in motion, and can realize real-time and multi-angle monitoring of the position of the target area of ​​the target object.

[0037] On this basis, the radiation sources can be arranged along the head and feet direction of the target object, which can effectively reduce the imaging blind area, improve the comprehensiveness of imaging, and reduce the requirements for the target object's body position; when there are multiple radiation sources, multi-ray source tomographic imaging can be achieved by adjusting the angle formed between the central axes of the beams of multiple radiation sources, the installation positions, arrangement directions and excitation sequences of multiple radiation sources. Tomographic imaging can image the target area of ​​the target object from different angles and improve the accuracy and detail display of three-dimensional images; further, during the treatment process, the detector and the radiation source can cooperate with each other to adjust the angle formed by the central axes of the multiple radiation sources, the installation positions and arrangement directions of the multiple radiation sources in real time according to the changes in the straight-line distance between the detector and the radiation source, so as to realize real-time, multi-angle monitoring of the position of the target area of ​​the target object and ensure the accuracy of treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0039] Figure 1 A schematic diagram of a scene of an imaging system provided in an embodiment of the present disclosure.

[0040] Figure 2 A schematic diagram of a radiotherapy system provided in an embodiment of the present disclosure.

[0041] Figure 3 A schematic diagram of the structure of a radiotherapy system provided in an embodiment of the present disclosure.

[0042] Figure 4 A schematic diagram of a real-time imaging scene provided by an embodiment of the present disclosure.

[0043] Figure 5 A schematic block diagram of an electronic device provided in accordance with an embodiment of the present disclosure. DETAILED DESCRIPTION

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

[0045] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0046] In the description herein, it should be understood that the terms "center", "length", "width", "upper", "lower", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present disclosure. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] In the description of the present disclosure, the word "exemplary" is used to mean "used as an example, illustration, or illustration". Any embodiment described in the present disclosure as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present disclosure. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present disclosure can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present disclosure with unnecessary details. Therefore, the present disclosure is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present disclosure.

[0048] It should be noted that since the method of the embodiment of the present disclosure is executed in an imaging control processing device, the processing objects of each imaging control processing device exist in the form of data or information. For example, time is actually time information. It can be understood that if size, quantity, position, etc. are mentioned in subsequent embodiments, the corresponding data exist so that the imaging control processing device can process them. The details will not be repeated here.

[0049] With the rapid development of computer and imaging technology, image-guided therapy technology has played an increasingly important role in improving the accuracy of radiotherapy. These technologies improve the local control rate of tumors and reduce the radiation dose of surrounding normal tissues, thereby reducing the damage to normal tissues.

[0050] In order to overcome positioning errors caused by organ movement (such as breathing) and changes in the position of the target object, and to accurately find tumor tissue, real-time or near-real-time imaging technology is used to locate the tumor during treatment, thereby reducing damage to healthy tissue and improving treatment outcomes.

[0051] The existing image-guided imaging technologies mainly include cone beam CT imaging, dual-plate orthogonal imaging and magnetic resonance imaging. Among them, dual-plate orthogonal imaging is quasi-three-dimensional imaging with low imaging dose and fast imaging speed. However, the existing dual-plate orthogonal system requires two detectors located on both sides of the target object and two radiation sources arranged opposite to the two detectors, which increases the complexity of the equipment and occupies more space; in terms of angle, the angle of the existing dual-plate orthogonal imaging system is fixed, which not only limits the imaging angle, but also makes it difficult to obtain multi-perspective information in complex anatomical structures, and the field of view is limited, resulting in the inability to fully observe a large range of lesions or anatomical areas, and it is easy to miss important peripheral information, thereby affecting the accuracy of diagnosis; in addition, since the angle of the existing dual-plate orthogonal imaging system is not adjustable, it lacks multi-angle real-time imaging support and cannot cope with certain rapidly changing diagnostic needs; and when using the existing dual-plate orthogonal imaging system for imaging, the target object needs to maintain a specific posture more accurately, and the position requirements of the target object are high.

[0052] Based on the above technical problems, the present disclosure provides an imaging system. Figure 1 A scene schematic diagram of an imaging system provided in an embodiment of the present disclosure, which is used to image a target object 1, includes: a ray source 2, which is used to emit a beam 201 to the target object 1; a detector 3, which is arranged relative to the ray source 2; a treatment bed 5, which is located between the ray source 2 and the detector 3 and is relatively fixed in position to the detector 3, and is used to carry and drive the target object 1 to move; during the movement of the treatment bed 5, the beam 201 emitted by the ray source 2 always partially or completely overlaps with the target area of ​​the target object 1, and the beam 201 that passes through the target area of ​​the target object 1 can be received by the detector 3.

[0053] It should be noted that the movement process of the diagnosis and treatment bed 5 refers to the movement process of the diagnosis and treatment bed 5 from the positioning reference point to the center point of radiotherapy.

[0054] It should be noted that by relatively fixing the positions of the diagnosis and treatment bed 5 and the detector 3 and reducing the complexity of the equipment, the imaging operation can be simplified and the imaging time can be reduced. The image of the target area of ​​the target object 1 in motion can be obtained quickly and accurately, and the position of the target area of ​​the target object 1 can be monitored in real time and from multiple angles.

[0055] In some embodiments, the movement modes of the diagnosis and treatment bed 5 and the detector 3 are not limited. The diagnosis and treatment bed 5 and the detector 3 may move simultaneously or separately, so as to ensure that the positions of the diagnosis and treatment bed 5 and the detector 3 are relatively fixed.

[0056] In some embodiments, the radiation emitted by the radiation source 2 may be a beam 201 (eg, X-rays), and the beam 21 passes through a target area of ​​the target object 1 and is received by the detector 3 .

[0057] In some embodiments, the radiation source 2 is a conventional device in the art capable of emitting a radiation beam 201, such as a tube.

[0058] In some embodiments, there are multiple ray sources 2 , preferably, there are two ray sources 2 .

[0059] In some optional embodiments, there are multiple ray sources 2 , and central axes of beams 201 of the multiple ray sources 2 intersect at the imaging point 4 .

[0060] Preferably, the imaging point 4 coincides with the center point of the target area of ​​the target object 1 .

[0061] In some optional embodiments, there are multiple ray sources 2, and the angle formed between the central axes of the beams 201 of the multiple ray sources 2, the installation positions, arrangement directions and excitation sequences of the multiple ray sources 2 can be adjusted. The purpose of the above adjustment is to ensure that during the movement of the diagnosis and treatment bed 5, the beam 201 emitted by the ray source 2 always partially or completely overlaps with the target area of ​​the target object 1, and the beam 201 passing through the target area of ​​the target object 1 can be received by the detector 3.

[0062] In some embodiments, the imaging system includes an adjustment device, which can adjust one or more of the beam exit angle, installation position, and arrangement direction of the ray source 2. For example, the adjustment device can adjust the angle formed between the central axes of the beams 201 of the ray source 2 by adjusting the beam exit angle of the ray source 2.

[0063] In some embodiments, the ray sources 2 are distributed along the head and feet direction or the sides of the arms of the target object 1. Preferably, the ray sources 2 are arranged along the head and feet direction of the target object 1. In this embodiment, the ray sources 2 along the head and feet direction of the target object 1 can effectively reduce the imaging blind area, improve the comprehensiveness of the imaging, and reduce the requirements for the body position of the target object.

[0064] In some embodiments, the imaging system includes: a plurality of ray sources 2 and a detector 3 disposed opposite to the plurality of ray sources 2. In this embodiment, the rays from the plurality of ray sources 2 can be received by the same detector 3.

[0065] In some optional embodiments, the number of ray sources 2 is two, and the two ray sources 2 are arranged along the head and feet direction of the target object 1 .

[0066] The central axes of the beams 201 of the two ray sources 2 intersect at the imaging point 4.

[0067] Preferably, the imaging point 4 coincides with the center point of the target area of ​​the target object 1. When the imaging point 4 coincides with the center point of the target area of ​​the target object 1, the imaging accuracy is higher.

[0068] In some embodiments, the linear distance between the detector 3 and the radiation source 2 is adjustable. By adjusting the linear distance between the detector 3 and the radiation source 2, the relative position of the detector 3 and the diagnosis and treatment bed 5 can be fixed during the movement of the diagnosis and treatment bed 5.

[0069] In some embodiments, a side surface of the detector 3 that receives the beam 201 may be a plane or a curved surface, for example, a plane.

[0070] In some embodiments, the size of the detector 3 is not restricted, and preferably, it only needs to cover the target area of ​​the target object 1 .

[0071] In some embodiments, the length of the detector 3 can be selected according to actual conditions, for example, 48 inches, ie, 121.92 cm.

[0072] In some embodiments, the width of the detector 3 can be selected according to actual conditions, for example, 17 inches, that is, 43.18 cm.

[0073] In some embodiments, the model of the detector 3 includes Mercu 1748V flat panel detector or Venu 1748V flat panel detector.

[0074] In some embodiments, the pixel size of the detector 3 can be selected according to actual conditions, for example, 139 μm.

[0075] In some embodiments, the number of detectors 3 can be selected according to actual conditions, for example, 1.

[0076] In an optional embodiment, the imaging system includes: two radiation sources 2, used to emit a beam 201 to a target object 1; a detector 3, arranged opposite to the radiation source 2; a treatment bed 5, located between the radiation source 2 and the detector 3, and fixed relative to the detector 3, for carrying and driving the target object 1 to move; during the movement of the treatment bed 5, the beam 201 emitted by the radiation source 2 always partially or completely overlaps with the target area of ​​the target object 1, and the beam 201 passing through the target area of ​​the target object 1 can be received by the detector 3.

[0077] In the above embodiment, one detector 3 is used to replace the original double detector structure, which can achieve the effects of reducing equipment complexity, saving space and lowering operation difficulty.

[0078] In the above optional embodiment, the two ray sources 2 can be arranged along the head and foot direction of the target object 1. When the ray sources 2 are arranged in the head and foot direction of the target object 1 and are aligned with the same detector 3, longitudinal image acquisition can be achieved. Furthermore, two-dimensional image data at multiple angles can be obtained by alternately exciting the head and tail ray sources 2.

[0079] In the above optional embodiment, the central axes of the beams 201 of the two ray sources 2 intersect at the imaging point 4 .

[0080] Preferably, the imaging point 4 coincides with the center point of the target area of ​​the target object 1 .

[0081] In the above specific embodiment, the model of the detector 3 may be a Mercu 1748V flat panel detector or a Venu 1748V flat panel detector.

[0082] In some embodiments, the diagnosis and treatment bed 5 includes a bed board 501 and a bed base 502 , the bed board 501 is fixed on the bed base 502 , and the positions of the bed board 501 and the detector 3 are relatively fixed.

[0083] In some optional embodiments, the detector 3 is disposed on the bed board 501 . Preferably, the detector 3 is fixed on the surface of the bed board 501 or the detector 3 is embedded in the bed board 501 .

[0084] There is no limitation on the fixing method, for example, fixing by fitting is adopted.

[0085] In the above optional embodiment, the detector 3 is arranged on the bed board 501 so that during the movement of the diagnosis and treatment bed 5 , the relative position of the detector 3 and the diagnosis and treatment bed 5 is always fixed, and the detector 3 can move with the movement of the diagnosis and treatment bed 5 .

[0086] In some embodiments, the bed board 501 and the detector 3 can reciprocate along the X-axis, Y-axis and Z-axis in the IEC coordinate system, respectively. The X-axis in the IEC coordinate system is parallel to the width direction of the diagnosis and treatment bed 5, the Y-axis is parallel to the length direction of the diagnosis and treatment bed 5, and the Z-axis is parallel to the height direction of the diagnosis and treatment bed 5.

[0087] The bed plate 501 of the diagnosis and treatment bed 5 disclosed in the present invention can reciprocate along the X-axis, Y-axis and Z-axis to move the target area of ​​the target object 1 into the imaging area of ​​the imaging system during imaging, and the detector 3 can reciprocate along the X-axis, Y-axis and Z-axis to be relatively fixed in position with the bed plate 501.

[0088] In the above embodiment, the angle formed between the central axes of the beams 201 of the ray sources 2 of the imaging system, the installation positions, arrangement directions and excitation sequences of the multiple ray sources 2 can be adjusted to achieve that during the movement of the diagnostic bed 5, the beams 201 emitted by the ray sources 2 always partially or completely overlap with the target area of ​​the target object 1, and the beams 201 passing through the target area of ​​the target object 1 can be received by the detector 3. It can achieve real-time, multi-angle monitoring of the position of the target area of ​​the target object during the movement of the diagnostic bed.

[0089] In some embodiments, the imaging system may further include: an imaging control processing device, which can control the imaging system to perform imaging based on an imaging mode selected by a user.

[0090] In some optional embodiments, the imaging method of the imaging system includes tomography, KV imaging or CBCT imaging.

[0091] The tomographic imaging is performed on the target area of ​​the target object 1 in different directions.

[0092] The CBCT imaging is aimed at the target area of ​​the target object 1 and is performed in different directions.

[0093] In some embodiments, the imaging control processing device may run a computer system, wherein the computer system includes a processor, and the processor is used to implement the imaging method implemented by the imaging control processing device.

[0094] In some embodiments, the imaging control processing device is a computer device with a graphical user interface (GUI), and the computer device includes: one or more processors, a memory, and one or more applications. For example, the imaging control processing device may include an imaging system application, and the processor of the imaging control processing device executes the imaging system application to achieve: reconstructing multiple sub-projection images in the projection image corresponding to each group of focus light source groups to obtain a three-dimensional image of the target soft tissue.

[0095] In the embodiment of the present disclosure, the entity of the imaging control processing device may be a terminal or a server, which is not limited in the embodiment of the present application.

[0096] Optionally, the terminal may be at least one of a smart phone, a smart watch, a desktop computer, a laptop computer, a virtual reality terminal, an augmented reality terminal, a wireless terminal, a laptop computer and the like.

[0097] Optionally, the above-mentioned server can be an independent physical server, or a server cluster or distributed file system composed of multiple physical servers, or at least one of the cloud servers that provide basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks, and big data or artificial intelligence platforms, etc., which is not limited in the embodiments of the present disclosure. In some embodiments, the number of the above-mentioned servers can be more or less, which is not limited in the embodiments of the present disclosure. Of course, the server can also include other functions to provide more comprehensive and diversified services.

[0098] According to an embodiment of the present disclosure, the present disclosure also provides a radiotherapy system, which includes: the aforementioned imaging system; and radiotherapy equipment.

[0099] Figure 2 A schematic diagram of a radiotherapy system provided in an embodiment of the present disclosure is shown below. Figure 2 The radiotherapy system of the present disclosure is described.

[0100] In some embodiments, the area where the beam 201 emitted by the ray source 2 of the imaging system overlaps with the target area of ​​the target object 1 and the treatment area of ​​the radiotherapy device 6 always partially or completely overlaps.

[0101] In some embodiments, during the movement of the diagnosis and treatment bed 5 from the positioning reference point of the radiotherapy device 6 to the radiotherapy isocenter 601, the imaging system monitors the position of the target area of ​​the target object 1, and the imaging point 4 of the imaging system moves along the line connecting the positioning reference point and the radiotherapy isocenter 601;

[0102] The line connecting the positioning reference point and the radiotherapy isocenter 601 is parallel to the X-axis, Y-axis or Z-axis in the IEC coordinate system of the radiotherapy device 6 .

[0103] It should be noted that during the movement of the diagnosis and treatment bed 5, the imaging system monitors the position of the target area of ​​the target object 1 by performing multiple imaging of the target area of ​​the target object 1 at a certain frequency. Each imaging has a corresponding imaging point 4. During the movement of the diagnosis and treatment bed 5, the imaging point 4 moves along the line connecting the positioning reference point and the radiotherapy isocenter point 601.

[0104] The X-axis in the IEC coordinate system is parallel to the width direction of the diagnosis and treatment bed 5 , the Y-axis is parallel to the length direction of the diagnosis and treatment bed 5 , and the Z-axis is parallel to the height direction of the diagnosis and treatment bed 5 .

[0105] In some embodiments, when the radiotherapy device 6 is a gamma knife device, the radiotherapy isocenter 601 of the radiotherapy device 6 coincides with the nuclear physics center point, and the imaging point 4 of the imaging system moves along the line connecting the positioning reference point and the nuclear physics center point. The nuclear physics center refers to the center point of the focusing area of ​​the radiation of the radiotherapy device 6 during the treatment process.

[0106] In the present disclosure, the radiotherapy device 6 may be a conventional device in the art that can be equipped with the aforementioned imaging system, and the specific type is not described in detail herein.

[0107] In some embodiments, the radiation source 2 in the imaging system is installed on the fixed part or the rotating part of the radiotherapy equipment 6. Preferably, the radiation source 2 is installed on the fixed part, for example, on the fixed part of the rack or equipment frame of the radiotherapy equipment 6.

[0108] For example, Figure 3 A structural schematic diagram of a radiotherapy system provided in an embodiment of the present disclosure, the radiotherapy system comprises: an imaging system; a radiotherapy device 6;

[0109] The radiotherapy device 6 includes a frame 603 and a radiotherapy host 602 disposed on the frame 603 .

[0110] Optionally, the rack 603 is a frame structure, and the radiotherapy mainframe 602 is supported and fixed by the rack 603 .

[0111] Optionally, the ray source 2 of the imaging system is fixed on the frame 603 , and the ray source 2 is arranged along the head and feet direction of the target object 1 .

[0112] Optionally, the diagnosis and treatment bed 5 includes a bed board 501 and a bed base 502, the bed board 501 is fixed on the bed base 502, and the positions of the detector 3 and the bed board 501 are relatively fixed. Preferably, the detector 3 is arranged on the bed board 501, and more preferably, the detector 3 is fixed on the bed board 501.

[0113] Optionally, the detector of the imaging system is a flat panel detector.

[0114] Optionally, the bed plate 501 of the diagnosis and treatment bed 5 and the detector 3 can reciprocate along the X-axis, Y-axis and Z-axis in the IEC coordinate system respectively.

[0115] Optionally, during the movement of the diagnosis and treatment bed 5 from the positioning reference point of the radiotherapy device 6 to the radiotherapy isocenter 601, the imaging system monitors the position of the target area of ​​the target object 1, and the imaging point 4 of the imaging system moves along the line connecting the positioning reference point and the radiotherapy isocenter 601;

[0116] The line connecting the positioning reference point and the radiotherapy isocenter 601 is parallel to the X-axis, Y-axis or Z-axis in the IEC coordinate system of the radiotherapy device 6 .

[0117] According to an embodiment of the present disclosure, the present disclosure further provides an imaging method, which is applied to the aforementioned imaging system, and the method includes:

[0118] The radiation source 2 is adjusted so that during the movement of the diagnosis and treatment bed 5, the beam 201 emitted by the radiation source 2 always partially or completely overlaps with the target area of ​​the target object 1, and the beam 201 passing through the target area of ​​the target object 1 can be received by the detector 3 to generate image data.

[0119] The imaging method provided by the embodiment of the present disclosure can be applied to Figure 1 Imaging systems in Figure 2 and Figure 3 The following is based on Figure 1 The imaging system shown, Figure 2 and Figure 3 The radiotherapy system shown introduces the imaging method provided by the embodiment of the present disclosure.

[0120] In the disclosed embodiment, the straight-line distance between the flat panel detector 3 and the radiation source 2 can be adjusted by the reciprocating motion of the diagnosis and treatment bed 5 .

[0121] In some embodiments, the adjustment of the radiation source 2 may include one or more of the following: adjusting the number of radiation sources 2, adjusting the installation position of the radiation source 2, adjusting the arrangement direction of the radiation source 2, adjusting the excitation order of the radiation source 2, and adjusting the angle formed between the central axes of the beams 201 of multiple radiation sources 2. Since the relative position of the diagnosis and treatment bed 5 and the detector 3 are fixed, by adjusting the position of the diagnosis and treatment bed 5, it can be achieved that during the movement of the diagnosis and treatment bed 5, the beam 201 emitted by the radiation source 2 always partially or completely overlaps with the target area of ​​the target object 1, and the beam 201 passing through the target area of ​​the target object 1 can be received by the detector 3 to generate image data. In this case, the acquired image data is reconstructed to obtain a three-dimensional image of the target area of ​​the target object.

[0122] In some embodiments, the imaging method of the present disclosure can be applied to a radiotherapy system to monitor the position of the target area of ​​the target object 1 in real time during radiotherapy, such as Figure 4 As shown, Figure 4 A schematic diagram of a real-time imaging scene provided by an embodiment of the present disclosure, the imaging method includes:

[0123] The diagnosis and treatment bed 5 carries and drives the bed plate 501 of the target object 1 to move upward until the target area of ​​the target object 1 partially or completely overlaps with the treatment area of ​​the radiotherapy equipment 6; during the movement of the bed plate 501, the radiation source 2 is synchronously adjusted so that during the movement of the diagnosis and treatment bed 5, the beam 201 emitted by the radiation source 2 always partially or completely overlaps with the target area of ​​the target object 1.

[0124] Optionally, the imaging point 4 of the imaging system coincides with the center of the target area of ​​the target object 1 .

[0125] Preferably, during the movement of the diagnosis and treatment bed 5 from the positioning reference point of the radiotherapy device 6 to the radiotherapy isocenter 601, the imaging system monitors the position of the target area of ​​the target object 1, and the imaging point 4 of the imaging system moves along the line connecting the positioning reference point and the radiotherapy isocenter 601;

[0126] The line connecting the positioning reference point and the radiotherapy isocenter 601 is parallel to the X-axis, Y-axis or Z-axis in the IEC coordinate system of the radiotherapy device 6 .

[0127] In the above embodiment, by setting up multiple ray sources 2, image data from multiple angles are collected, and the detector 3 and the ray source 2 cooperate with each other, the angle, installation position and arrangement order of the central axis of the beam 201 of the ray source 2 are adjusted in real time according to the height change of the detector 3, so that the position of the target area of ​​the target object 1 can be monitored to ensure the treatment accuracy.

[0128] Furthermore, by sequentially or simultaneously exciting the ray source 2 in different directions (angles), image data in multiple directions (angles) can be obtained, and a tomographic image can be obtained after tomographic reconstruction. Tomographic imaging can image the in vivo tissues of the target object 1 from different levels, thereby improving the accuracy and detail display of the three-dimensional image.

[0129] Optionally, the image data acquired from the detector 3 may also include a process of preprocessing the image data (such as image correction) before reconstruction to obtain noise-reduced image data.

[0130] In some embodiments, the imaging method of the present disclosure can also be applied to a radiotherapy system to position the target object 1. The imaging method includes: adjusting the position of the target object 1 so that the beam 201 emitted by the radiation source 2 partially or completely overlaps with the target area of ​​the target object 1, exciting the radiation source 2 to emit the beam 201, and the detector 3 detecting the beam passing through the target area of ​​the target object 1 to generate image data.

[0131] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the imaging method provided by the present disclosure.

[0132] Figure 5 A schematic block diagram of an example electronic device 7 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein. In some embodiments, the electronic device can be the aforementioned imaging control processing device.

[0133] like Figure 5 As shown, the electronic device 7 includes a computing unit 701, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory 702 or a computer program loaded from a storage unit 708 to a random access memory 703. In the random access memory (Random Access Memory, RAM) 703, various programs and data required for the operation of the electronic device 7 can also be stored. The computing unit 701, the read-only memory (Read-Only Memory, ROM) 702 and the RAM 703 are connected to each other through a bus 704. An input / output (Input / Output, I / O) interface 705 is also connected to the bus 704.

[0134] A number of components in the electronic device 7 are connected to the input / output interface 705, including: an input unit 706, such as a keyboard, a mouse, etc.; an output unit 707, such as various types of displays, speakers, etc.; a storage unit 708, such as a disk, an optical disk, etc.; and a communication unit 709, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 709 allows the electronic device 7 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0135] The computing unit 701 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 701 include, but are not limited to, a central processing unit, a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital signal processors, and any appropriate processors, controllers, microcontrollers, etc. The computing unit 701 performs the various methods and processes described above, such as a data matching method. For example, in one embodiment, the data matching method may be implemented as a computer software program, which is tangibly included in a machine-readable medium, such as a storage unit 708.

[0136] According to an embodiment of the present disclosure, the present disclosure further provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable an electronic device to execute the imaging method provided by the present disclosure.

[0137] According to an embodiment of the present disclosure, the present disclosure further provides a computer program product, including a computer program, which implements the imaging method provided by the present disclosure when being executed by a processor.

[0138] In one embodiment, part or all of the computer program may be loaded and / or installed on the electronic device 7 via the ROM 702 and / or the communication unit 709. When the computer program is loaded into the RAM 703 and executed by the computing unit 701, one or more steps of the data matching method described above may be performed. Alternatively, in other embodiments, the computing unit 701 may be configured to perform the data matching method in any other appropriate manner (e.g., by means of firmware).

[0139] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays, application specific integrated circuits, application specific standard parts (ASSP), system on chip systems (System On Chip, SOC), complex programmable logic devices (Complex Programmable Logic Device, CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs, which can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor, which can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0140] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0141] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, optical fibers, portable compact disk read-only memories, optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0142] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user, such as a cathode ray tube (CRT) or a liquid crystal display (LCD) monitor; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0143] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: Local Area Networks (LANs), Wide Area Networks (WANs), and the Internet.

[0144] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, a server of a distributed system, or a server combined with a blockchain.

[0145] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of this disclosure can be achieved, and this document is not limited here.

[0146] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An imaging system, characterized in that: Used to image target objects, including: A ray source, used to emit a beam to a target object; A detector, arranged opposite to the radiation source; A diagnostic bed, located between the radiation source and the detector, fixed relative to the detector, and used to carry and drive the target object to move; During the movement of the diagnosis and treatment bed, the beam emitted by the ray source always partially or completely overlaps with the target area of ​​the target object, and the beam passing through the target area of ​​the target object can be received by the detector.

2. The imaging system according to claim 1, characterized in that The number of the ray sources is multiple.

3. The imaging system according to claim 2, characterized in that The central axes of the beams of the multiple ray sources intersect at the imaging point.

4. The imaging system according to claim 2, characterized in that: The angle formed between the central axes of the beams of the multiple ray sources, the installation positions, arrangement directions and excitation sequences of the multiple ray sources can all be adjusted.

5. The imaging system according to claim 2, characterized in that: The plurality of ray sources are arranged along the head-foot direction of the target object.

6. The imaging system according to claim 1, characterized in that: The straight-line distance between the detector and the ray source is adjustable.

7. The imaging system according to claim 1, characterized in that: The diagnosis and treatment bed comprises a bed board and a bed base, wherein the bed board is fixed on the bed base, and the positions of the bed board and the detector are relatively fixed.

8. The imaging system according to claim 7, characterized in that: The detector is arranged on the bed board.

9. The imaging system according to claim 7, characterized in that: The bed plate and the detector can reciprocate along the X-axis, Y-axis and Z-axis in the IEC coordinate system respectively.

10. The imaging system according to claim 1, characterized in that include: An imaging control processing device, wherein the imaging control processing device can control the imaging system according to any one of claims 1 to 9 to perform imaging based on an imaging mode selected by a user.

11. The imaging system according to claim 10, characterized in that: The imaging method includes tomography, KV imaging or CBCT imaging.

12. The imaging system according to claim 1, characterized in that The size of the detector can cover the target area of ​​the target object.

13. A radiotherapy system, characterized in that: It includes: The imaging system as claimed in any one of claims 1 to 12; Radiation therapy equipment.

14. The radiotherapy system according to claim 13, characterized in that: The area where the beam emitted by the radiation source overlaps with the target area of ​​the target object and the treatment area of ​​the radiotherapy device always partially or completely overlap.

15. The radiotherapy system according to claim 13, characterized in that: During the movement of the diagnosis and treatment bed from the positioning reference point of the radiotherapy device to the radiotherapy isocenter, the imaging system monitors the position of the target area of ​​the target object, and the imaging point of the imaging system moves along the line connecting the positioning reference point and the radiotherapy isocenter; Wherein, a line connecting the positioning reference point and the radiotherapy isocenter is parallel to the X-axis, Y-axis or Z-axis in the IEC coordinate system of the radiotherapy equipment.

16. An imaging method, characterized in that: The method is applied to the imaging system according to any one of claims 1 to 12, and the method comprises: The radiation source is adjusted so that during the movement of the diagnostic bed, the beam emitted by the radiation source always partially or completely overlaps with the target area of ​​the target object, and the beam passing through the target area of ​​the target object can be received by the detector to generate image data.

17. The imaging method according to claim 16, characterized in that: The number of the ray sources is multiple, and the adjustment includes one or more of the following: adjusting the number of the radiation sources; Adjusting the installation position of the radiation source; Adjusting the arrangement direction of the ray sources; adjusting the excitation sequence of the ray sources; The angle formed between the central axes of the beams of the plurality of ray sources is adjusted.

18. An electronic device, characterized in that: The electronic device comprises: processor; a memory configured to store instructions executable by the processor; The processor is configured to execute the instructions to implement the imaging method as claimed in claim 16 or 17.

Images