Radioactive ray imaging method and device

Abstract

The invention discloses a radioactive ray imaging method and equipment. The method comprises the following steps: acquiring a positioning attention item on an image based on a positioning image; wherein the positioning attention item comprises a region of interest of the detected person, an imaging surface region of the detector and an irradiation field region of the detected person irradiated by the ray source; and acquiring range information and / or position information of the region of interest, the imaging surface region and the irradiation field region based on the positioning attention item, wherein the range information and / or the position information are / is used for performing positioning quality control. The invention provides a scheme for quantitatively or qualitatively assisting a user in positioning quality control.

Description

Technical Field

[0001] The present invention relates to the field of radioactive ray imaging, and in particular to a method and device for radioactive ray imaging. Background Art

[0002] Radioactive ray imaging equipment is a common imaging system in medical digital imaging and is widely used in the field of physical examination and conventional medical imaging diagnosis. Radioactive ray imaging equipment is a device that uses radioactive rays (such as X-rays) to penetrate the subject to form an image.

[0003] Take digital radiography (DR) as an example. Due to its advantages of fast imaging speed, low radiation dose, clear and delicate images, and the ability to examine the entire body, it is widely used in clinical examinations and has become one of the main auxiliary means for doctors to diagnose diseases. Positioning is an important part of the technician's examination process. There are many requirements for positioning. For example, the subject's shooting area needs to be placed on the imaging surface and within the irradiation field and meet the requirements to prevent incomplete coverage of the diagnosis area or excessive radiation hazards; for another example, the subject's overall or partial posture needs to be adjusted to meet the shooting requirements.

[0004] In actual situations, radiological technicians mainly rely on their own subjective experience for the pre-exposure operation process and lack objective evaluation and measurement tools. In addition, there are a large number of body positions, so ensuring that all matters related to the positioning of the subject meet the positioning standards has become a problem that troubles technicians. Summary of the invention

[0005] In view of the above problems, the present invention proposes a method and device for radioactive ray imaging, which are described in detail below.

[0006] According to the first aspect, an embodiment provides a method for radioactive ray imaging, comprising:

[0007] Acquire a positioning image, wherein the positioning image is an image of the subject at a shooting position between the radiation source and the detector;

[0008] Acquire positioning focus items on the image based on the positioning image; wherein the positioning focus items include the area of ​​interest of the subject, the imaging surface area of ​​the detector, and the irradiation field area of ​​the radiation source irradiating the subject;

[0009] Based on the positioning focus item, range information and / or position information of the region of interest, the imaging surface area and the irradiation field area are acquired, and the range information and / or the position information are used for positioning quality control.

[0010] In one embodiment, the range information and / or the position information are used for positioning quality control, including: calculating the position matching degree based on the range information and / or the position information, the position matching degree including: the position matching degree between the region of interest and the imaging surface area, and the position matching degree between the region of interest and the irradiation field area; positioning quality control is performed by displaying the position matching degree.

[0011] In one embodiment, the positioning focus items also include one or more of the detection field area of ​​the dose estimation unit, the body position of the subject presented by the positioning image, the positioning requirements, the current posture information of the subject associated with the positioning requirements, and foreign matter that affects imaging.

[0012] In one embodiment, the method further comprises: performing positioning quality control by displaying one or more of the positioning focus items.

[0013] In one embodiment, the displaying of one or more of the positioning concern items includes: generating and displaying a positioning quality control image, the positioning quality control image including an auxiliary image, the positioning quality control image also including one or more of the positioning concern items; the auxiliary image is the positioning image or a schematic image obtained based on the positioning image.

[0014] In one embodiment, the positioning quality control image displays the region of interest, the imaging surface area and the irradiation field area by superimposing a schematic diagram on the auxiliary image contained therein; preferably, the schematic diagram includes an area defined by lines;

[0015] and / or, displaying the region of interest, the imaging surface area and the irradiation field area in the positioning quality control image in the form of text and coordinates;

[0016] And / or, the position matching degree is displayed in the positioning quality control image in the form of text and coordinates.

[0017] In one embodiment, the position matching degree is displayed on the positioning quality control image by marking the deviation size of the area defined by the lines, and the deviation size includes one or more of the deviation size of the boundary, the deviation size of the corner point and the deviation size of the center.

[0018] In one embodiment, acquiring a positioning focus item on an image based on the positioning image includes: displaying the positioning image, and receiving a region selection instruction from a user on the positioning image to determine the region of interest; or, identifying an anatomical structure associated with the body position to be photographed of the subject from the positioning image, and generating the region of interest based on the anatomical structure.

[0019] In one embodiment, obtaining a positioning focus item on an image based on the positioning image includes:

[0020] Acquiring a positioning requirement associated with the body position to be photographed of the subject;

[0021] Identifying, from the positioning image, an anatomical structure associated with the body position to be photographed of the subject;

[0022] Based on the positioning requirement and the identified anatomical structure, current posture information of the subject associated with the positioning requirement is determined.

[0023] In one embodiment, the method further includes: acquiring a positioning image after the positioning is completed, determining whether the subject is moving based on the positioning image after the positioning is completed and the positioning image acquired thereafter, and if moving, generating prompt information for indicating the movement status.

[0024] In one embodiment, displaying the positioning focus item includes: displaying by projection, wherein:

[0025] Displaying the region of interest by projecting onto the subject, wherein the region of interest displayed by projection is consistent with the position of the actual region of interest of the subject; and / or,

[0026] Displaying the imaging surface area by projecting onto the subject, wherein the imaging surface area displayed by projection is consistent with the position of the actual imaging surface area of ​​the detector; and / or,

[0027] Displaying the irradiation field area by projecting onto the subject, wherein the irradiation field area displayed by the projection is consistent with the position of the actual irradiation field of the radiation source; and / or,

[0028] Displaying the detection field area by projecting it onto the subject, wherein the detection field area displayed by the projection is consistent with the position of the actual detection field area of ​​the dose estimation unit; and / or,

[0029] The position matching degree is displayed by projecting onto the detected person.

[0030] In one embodiment, the positioning image is an image acquired in real time, and when the positioning image changes, the positioning focus item is updated in real time.

[0031] In one embodiment, the range information and / or the position information are used to perform positioning quality control, including: performing quality control based on the range information and / or the position information to obtain quality control result items, the quality control result items including imaging surface quality control result items and irradiation field quality control result items, the imaging surface quality control result items are used to indicate whether the range and / or position of the region of interest and the imaging surface area meet the required quality control results, and the irradiation field quality control result items are used to indicate whether the range and / or position of the region of interest and the irradiation field area meet the required quality control results; positioning quality control is performed by displaying the imaging surface quality control result items and the irradiation field quality control result items.

[0032] In one embodiment, the method further includes: performing quality control based on the positioning focus item to obtain a quality control result item, the quality control result item further includes: one or more of a detection field quality control result item, a body position quality control result item, a posture quality control result item and a foreign matter quality control result item; wherein the body position quality control result item is used to indicate whether the body position of the subject presented by the positioning image meets the required quality control result, the posture quality control result item is used to indicate whether the current posture information of the subject associated with the positioning requirement meets the required quality control result, the detection field quality control result item is used to indicate whether the detection field area is within the region of interest and / or whether the detection field area is a quality control result of the detection field area that should be selected to be turned on, and the foreign matter quality control result item is used to indicate whether there is a foreign body and / or whether a foreign body exists in the region of interest;

[0033] Display one or more of the detection field quality control result items, the body position quality control result items, the posture quality control result items and the foreign matter quality control result items.

[0034] In one embodiment:

[0035] The imaging surface quality control result item is used to indicate: whether the center of the region of interest and the imaging surface area is within a preset deviation; and / or whether the boundary of the region of interest and the imaging surface area is within a preset deviation; and / or,

[0036] The irradiation field quality control result item is used to indicate: whether the center of the region of interest and the irradiation field area is within a preset deviation; and / or whether the boundary of the region of interest and the irradiation field area is within a preset deviation; and / or,

[0037] The body position quality control result item is used to indicate whether the body position of the subject presented by the positioning image is the body position of the subject to be photographed; and / or,

[0038] The posture quality control result item is used to indicate whether the posture information of the anatomical structure associated with the body position to be photographed of the subject in the current posture information of the subject associated with the positioning requirement meets the posture required by the positioning requirement associated with the body position to be photographed of the subject.

[0039] In one embodiment, the method further comprises: obtaining a prompt item based on the quality control result item, the prompt item being used to indicate a result caused when the quality control result item does not meet the requirement;

[0040] The prompt item is output.

[0041] In one embodiment, the method further includes: acquiring a guidance item based on the quality control result item, the guidance item being used to indicate an execution action guided when the quality control result item does not meet the requirement;

[0042] outputting the boot item; and / or controlling the device to execute an action based on the boot item.

[0043] In one embodiment, the guide item includes at least one of the following:

[0044] Guidance prompts for the position and / or angle of the detector;

[0045] Guidance prompts for the position and / or angle of the ray source;

[0046] Guidance prompts for the size of the irradiation field area;

[0047] A guidance prompt for selecting the detection field area;

[0048] Guiding the subject to move so that the imaging surface quality control result item and / or the irradiation field quality control result item meet the required prompt;

[0049] Guiding the subject to position his / her posture so that the body position quality control result item and / or posture quality control result item meet the required prompts.

[0050] In one embodiment, the method further includes: displaying the photographable body positions of the subject on a human-computer interaction interface; and determining the body position of the subject to be photographed from the photographable body positions in response to a selection instruction for the photographable body positions.

[0051] According to the second aspect, an embodiment provides a radioactive ray imaging device, comprising:

[0052] A radiation source, used for emitting radioactive rays to the person being tested;

[0053] a detector for receiving radioactive rays transmitted through the subject; and

[0054] A processor is used to execute the method described in any embodiment of the present invention.

[0055] According to the radioactive ray imaging method and device of some of the above embodiments, by acquiring a positioning image and acquiring a positioning focus item based on the positioning image, further acquiring range information and / or position information of the region of interest, the imaging surface area and the irradiation field area, and performing positioning quality control based on the range information and / or the position information, a solution for quantitatively or qualitatively assisting a user in performing positioning quality control is proposed;

[0056] According to the radioactive ray imaging method and device of some embodiments described above, by acquiring a positioning image and obtaining a positioning concern item based on the positioning image, and further calculating the position matching degree, and displaying relevant information for the user to view, the user can determine whether the positioning needs to be readjusted and how to adjust the positioning according to the above-identified positioning concern items, which is very convenient;

[0057] According to the radioactive ray imaging method and equipment of some of the above embodiments, the positioning image is acquired and the positioning focus items are acquired based on the positioning image. Then, the quality control result items are automatically obtained based on the positioning focus items, and the quality control result items are displayed on a component with a display function for technicians to view. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic diagram of the structure of a radioactive ray imaging device according to an embodiment;

[0059] Figure 2 is a schematic structural diagram of a ray source according to an embodiment;

[0060] Figure 3 is a schematic structural diagram of a ray source according to an embodiment;

[0061] Figure 4 A schematic diagram of the structure of a detector according to an embodiment;

[0062] Figure 5 A schematic diagram of the structure of a radioactive ray imaging device according to an embodiment;

[0063] Figure 6 A schematic diagram of the structure of a radioactive ray imaging device according to an embodiment;

[0064] Figure 7 A schematic diagram of the structure of a radioactive ray imaging device according to an embodiment;

[0065] Figure 8 A schematic diagram of the structure of a radioactive ray imaging device according to an embodiment;

[0066] Fig. 9A schematic diagram of the structure of a radioactive ray imaging device according to an embodiment;

[0067] Fig.10 A flowchart of a method for radioactive ray imaging according to an embodiment;

[0068] Fig.11 A flowchart of a method for radioactive ray imaging according to an embodiment;

[0069] Fig.12 A flowchart of a method for radioactive ray imaging according to an embodiment;

[0070] Fig.13 A flowchart of a method for radioactive ray imaging according to an embodiment;

[0071] Fig.14 A flowchart of a method for radioactive ray imaging according to an embodiment;

[0072] FIG15(a) is an example diagram of a setup image according to an embodiment; FIG15(b) is an example diagram of a setup quality control image according to an embodiment; FIG15(c) is an example diagram of a setup quality control image according to an embodiment; FIG15(d) is an example diagram of a setup quality control image according to an embodiment; FIG15(e) is an example diagram of a setup quality control image according to an embodiment;

[0073] Fig.16 An example diagram showing a focus item for positioning according to an embodiment;

[0074] Fig.17 An example diagram showing positioning requirements of an embodiment;

[0075] Fig.18 An example diagram of displaying a focus item of a positioning by means of projection in one embodiment;

[0076] FIG. 19( a ) is an example diagram showing quality control result items according to an embodiment; FIG. 19( b ) is an example diagram showing quality control result items according to an embodiment;

[0077] FIG. 20( a ) is an example diagram showing a guide item according to an embodiment; FIG. 20( b ) is an example diagram showing a guide item according to an embodiment;

[0078] FIG. 21( a ) is an example diagram of motion detection and display after positioning according to an embodiment; FIG. 21( b ) is an example diagram of motion detection and display after positioning according to an embodiment. DETAILED DESCRIPTION

[0079] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0080] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0081] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0082] Please refer to Figure 1 In some embodiments, a radioactive ray imaging device is provided, the device comprising a ray source 10, a detector 20 and a processor 30; the ray source 10 is used to emit radioactive rays such as X-rays to a subject; the detector 20 is used to receive the radioactive rays that pass through the subject to perform imaging. The following is a detailed description.

[0083] In some embodiments, please refer to Figure 2 The radiation source 10 may include a high voltage generator 11 and a radiation emitter 12; the high voltage generator 11 is electrically connected to the radiation emitter 12, and the high voltage generator 11 is used to provide a high voltage signal, such as a hundred volt or a thousand volt high voltage, to the radiation emitter 12; the radiation emitter 12 is used to bombard the target surface with electrons under the high voltage signal to generate radioactive radiation, such as X-rays, and the radiation emitter 12 may be, for example, a tube. The detector 20 is used to receive the radioactive radiation for imaging.

[0084] In some embodiments, please refer to Figure 3, the ray source 10 may further include a beam limiter 13. In some embodiments, the beam limiter 13 is used to determine or simulate the projection area of ​​the ray source 10 or the ray emitter 12, and the area irradiated by the beam limiter 13 may be referred to as an irradiation field or an irradiation field area. In addition, the ray source 10 is used to emit radioactive rays, and the detector 20 is used to receive radioactive rays; in this process, the beam limiter 13 can also be used to limit the irradiation field of the radioactive rays emitted by the ray emitter 12; therefore, in some examples, the beam limiter 13 can also play a role in constraining the radioactive rays and shielding the scattered radioactive rays.

[0085] The detector 20 is a core component of the radioactive ray imaging device, which has an important impact on the imaging quality. In some embodiments, the detector 20 is used to receive radioactive rays such as X-rays and finally convert them into electrical signals to complete the image information acquisition. Figure 4 In one embodiment, the detector 20 includes a ray conversion layer 21 and a TFT matrix layer 22. The ray conversion layer 21 is used to convert radioactive rays such as X-rays into visible light; the ray conversion 21 generally includes a scintillating layer or a fluorescent layer for converting the rays into visible light. Taking the scintillating layer as an example, it can generally be made of a scintillating material, typically, such as cesium iodide (CsI) or gadolinium oxysulfide (GOS). The TFT matrix layer 22 is used to sense the visible light converted by the ray conversion layer 21, and convert the visible light into an electrical signal for image information acquisition. In some embodiments, the detector 20 can be a flat-panel detector.

[0086] In some embodiments, please refer to Figure 5 The radioactive ray imaging device may also include one or more dose estimation units 23, which are used to estimate the dose of the ray during the ray imaging process so that the processor 30 or the ray source 10 can determine the timing of receiving the emitted ray, that is, to control the exposure cutoff.

[0087] In some embodiments, please refer to Figure 6 The radioactive ray imaging device may further include a camera 40, or the radioactive ray imaging device may further be connected to a camera 40; the camera 40 may be capable of performing image acquisition, such as real-time image acquisition. In one example, when the subject is located at a shooting position between the ray source 10 and the detector 20, the camera 40 may acquire an image to obtain an image of the subject at the shooting position between the ray source and the detector.

[0088] In some embodiments, please refer to Figure 7The radioactive ray imaging device further includes an output component, such as a display screen 50 or a voice playing component 51. In some embodiments, the display screen 50 may be integrated with a voice playing function. In some embodiments, the radioactive ray imaging device includes a supporting structure for supporting the ray source 10 and / or the detector 20. The display screen 50 and / or the voice playing component 51 may be arranged on the supporting structure.

[0089] Figure 8 It is an example of a mobile radioactive ray imaging device. In the figure, the support structure includes a movable body 210, a mechanical arm 211 disposed on the body 210, and a radiation source 10, and the mechanical arm 211 may be provided with the radiation source 10. In some embodiments, the radiation source 10 may have a shell structure for supporting and storing. In some embodiments, the radiation source 10 is used to support the radiation emitter 12, for example, the radiation emitter 12 is disposed in the radiation source 10. In some embodiments, the radiation source 10 is used to support the high-voltage generator 11, for example, the high-voltage generator 11 is disposed in the radiation source 10. In some embodiments, the beam limiter 13 is disposed in the radiation source 10. The detector 20 may be a flat-panel detector, which can be conveniently stored in the body 210 when not in use. Since the body 210 of the device is movable, it can be moved to a desired location for use, such as being pushed to an operating room, an emergency room, an ICU ward, a neonatal department, and an isolation area for critically ill patients. The movable body 210 is usually provided with a motion mechanism, which can be manually actuated or electrically driven to enable the movement of the device. The radiation source 10 can be suspended and movably arranged on the body 210, and can be moved in two or three dimensions in space through the mechanical arm 211. The detector 20 configured for the device can be wired or wireless: the wired flat panel detector 20 is generally connected to the body 210 through a cable to complete functions such as charging and data transmission; the wireless flat panel detector 20 can be mechanically separated from the body 210 for use, for example, the technician takes out the wireless flat panel detector 20 from the body 210 where the wireless flat panel detector 20 is stored for use. Generally, mobile radioactive ray imaging devices are equipped with wireless flat panel detectors. After receiving the exposure request, the processor 30 controls the radiation source 10 to expose, that is, to emit radioactive rays such as X-rays to the subject, and controls the wireless flat panel detector 20 to work in conjunction with the radiation source 10 to receive radioactive rays such as X-rays that pass through the subject for imaging. The imaged data may then be further transmitted to the processor 30 for image processing and subsequent control for display.

[0090] Fig. 9An example of a fixed radioactive ray imaging device. In the figure, the support structure may include a column 220, a slide rail 221 arranged on the column 220, and a ray source 10 arranged on the slide rail 221, and the ray source 10 can be moved in two or three dimensions in space through the slide rail 221. In some embodiments, the ray source 10 may have a shell structure for supporting and storing. In some embodiments, the ray source 10 is used to support the ray emitter 12, for example, the ray emitter 12 is arranged in the ray source 10. In some embodiments, the beam limiter 13 is arranged in the head 10. The device may also include a bed board 261 and a bed support structure 263 for supporting the bed board 261; the bed board 261 can be used to support the subject, for example, for the subject to lie flat. It should be noted that the fixed radioactive ray imaging device can be equipped with a vertically arranged detector 20 and a horizontally arranged detector 20, and both detectors 20 can be wired. It should be noted that some fixed radioactive ray imaging devices may be equipped with only one vertically arranged detector 20 or one horizontally arranged detector 20, or both detectors 20. Some other fixed radioactive ray imaging devices may also be equipped with wireless detectors 20, for example, a fixed X-ray imaging device may be equipped with a wireless flat panel detector 20, or may be equipped with both a wireless flat panel detector 20 and a wired flat panel detector 20. Whether it is a wired detector 20 or a wireless detector 20, both are used to receive X-rays for imaging.

[0091] In some embodiments, the radioactive ray imaging device is located in a shielded room, and a technician can operate the radioactive ray imaging device through a computer outside the shielded room. The computer outside the shielded room includes a host and a display.

[0092] Therefore, the component with display function in this article can be the display screen 50 or the display included in the computer.

[0093] In some embodiments, the radioactive ray imaging device may be a digital X-ray imaging device (Digital Radiography, DR).

[0094] The above are some descriptions of the equipment for radioactive ray imaging.

[0095] In some embodiments, the processor 30 is capable of executing the method of radiographic imaging disclosed herein or one or more steps thereof.

[0096] Please refer to Fig.10 The method of radiographic imaging may include the following steps:

[0097] Step S100: Acquire a positioning image, which is an image of the subject at a shooting position between the radiation source 10 and the detector 20.

[0098] For example, the camera 40 is used to capture images, such as a single frame or multiple frames of images, to obtain positioning images.

[0099] Step S110: acquiring a positioning focus item on the image based on the positioning image.

[0100] The inventor conducted research on clinical positioning-related issues and proposed positioning focus items, which are used to assist technicians in positioning the subject.

[0101] In some embodiments, the positioning focus items include the subject's area of ​​interest, the imaging surface area of ​​the detector 20, the irradiation field area of ​​the radiation source 10 on the subject, the detection field area of ​​the dose estimation unit 23, the subject's position presented in the positioning image, the positioning requirements, the subject's current posture information associated with the positioning requirements, and one or more of foreign objects that affect imaging.

[0102] The following is a description of each positioning concern.

[0103] The area of ​​interest of the subject: refers to the area of ​​the subject that needs to be included in the image obtained based on radiographic imaging, that is, the area of ​​the subject to be diagnosed. The doctor makes a diagnosis by viewing the radiographic image of this area; generally, the area of ​​interest of the subject is associated with the body position of the subject to be photographed.

[0104] In some embodiments, step S110 displays the positioning image, and receives a region selection instruction from a user (e.g., a technician) on the positioning image to determine the region of interest. For example, the positioning image is displayed on the display function component, and the technician specifies the region of interest by inputting a region selection instruction on the positioning image (e.g., performing a box selection operation on the positioning image using a tool such as a mouse).

[0105] In some embodiments, step S110 identifies the anatomical structure associated with the subject's position to be photographed from the positioning image, and generates a region of interest based on the anatomical structure. The recognition algorithm of step S110 may be based on methods such as machine learning.

[0106] Taking the chest posteroanterior position as an example, the anatomical structures associated with the body position to be photographed include the sixth thoracic vertebra, the apex of the lung, the posterior costophrenic angle, and the bony thorax and soft tissues on both sides; therefore, these anatomical structures are identified from the positioning image, and the sixth thoracic vertebra is taken as the center of the region of interest. The range of the region of interest includes the apex of the lung to the posterior costophrenic angle, and the bony thorax and soft tissues on both sides, so that the region of interest is generated based on the center and range of the region of interest.

[0107] Taking the shoulder joint anterior-posterior position as an example, the anatomical structures associated with the body position include the coracoid process, the proximal humerus, the clavicle and the scapula; therefore, these anatomical structures are identified from the positioning image, and then 2.5 cm below the coracoid process is taken as the center of the region of interest. The range of the region of interest includes the proximal humerus, the outer 2 / 3 of the clavicle and the upper part of the scapula, so that the region of interest is generated based on the center and range of the region of interest.

[0108] The imaging surface area of ​​the detector 20 refers to the area where the detector 20 can receive and sense radiation.

[0109] In some embodiments, step S110 displays the setup image, and receives a region selection instruction from a user (e.g., a technician) on the setup image to determine the imaging surface region of the controller 20. For example, the setup image is displayed on the display function component, and the technician specifies the imaging surface region of the detector 20 by inputting a region selection instruction on the setup image (e.g., performing a box selection operation on the setup image using a tool such as a mouse).

[0110] In some embodiments, step S110 identifies the detector 20 from the positioning image, and generates an imaging surface area of ​​the detector 20 based on the identified detector 20. Since the positioning image is an image of the subject at the shooting position between the radiation source 10 and the detector 20, the positioning image may also include an image of the detector 20. Therefore, the detector 20 can be identified from the image, for example, by determining its four corners through the identified controller 20, thereby positioning the detector 20 and generating its imaging surface area. The identification of the detector 20 from the positioning image may be based on methods such as machine learning.

[0111] In some embodiments, step S110 can also obtain the spatial position of the actual imaging surface area of ​​the detector 20 based on a sensor that can be positioned, that is, the position of the actual imaging surface area of ​​the detector 20 in the world coordinate system, and then obtain the position information of the imaging surface area of ​​the detector 20 in the positioning image based on the position transformation relationship between the positioning image and the world coordinate system.

[0112] The irradiation field area of ​​the subject irradiated by the radiation source 10 (hereinafter referred to as the irradiation field area of ​​the radiation source 10) refers to the position and / or range irradiated by the radiation emitted by the radiation source 10. Before taking a radiographic image, the technician can simulate the projection area of ​​the radiation source 10 or the radiation emitter 12 by means of the beam limiter 13, and the beam limiter 13 will irradiate a cone of light on the subject.

[0113] In some embodiments, step S110 displays the positioning image, and receives a region selection instruction from a user (e.g., a technician) on the positioning image to determine the irradiation field region of the subject irradiated by the radiation source 10. For example, the positioning image is displayed on the display function component, and the technician specifies the irradiation field region of the radiation source 10 by inputting a region selection instruction on the positioning image (e.g., performing a box selection operation on the positioning image using a tool such as a mouse).

[0114] Since the beam limiter 13 irradiates a conical light beam onto the subject to simulate the irradiation field area of ​​the radiation source 10, step S110 can also identify the irradiation field area of ​​the radiation source 10 from the positioning image based on the image formed by irradiating the conical light beam onto the subject.

[0115] In some embodiments, step S110 can also obtain the spatial position of the actual irradiation field area of ​​the ray source 10 based on a sensor that can be positioned, that is, the position of the actual irradiation field area of ​​the ray source 10 in the world coordinate system, and then obtain the position information of the irradiation field area of ​​the ray source 10 in the positioning image based on the position transformation relationship between the positioning image and the world coordinate system.

[0116] The detection field area of ​​the dose estimation unit 23 refers to the area where the dose estimation unit 23 can receive and sense radiation. In some embodiments, the dose estimation unit 23 can be turned on or off. When the dose estimation unit 23 is turned on, the detector area of ​​the dose estimation unit 23 is also turned on or effective.

[0117] In some embodiments, step S110 displays the setup image, and receives a region selection instruction from a user (e.g., a technician) on the setup image to determine the detection field region of the dose estimation unit 23. For example, the setup image is displayed on the display function component, and the technician specifies the detection field region of the dose estimation unit 23 by inputting a region selection instruction on the setup image (e.g., performing a box selection operation on the setup image using a tool such as a mouse).

[0118] In some embodiments, the dose estimation unit 23 is generally disposed on the detector 20 and its position is relatively fixed, so step S110 may also identify the detector 20 from the positioning image and determine the detection field area of ​​the dose estimation unit 23 based on the identified detector 20 .

[0119] In some embodiments, the processor 30 is capable of obtaining information on whether the dose estimation unit 23 is turned on or off; therefore, the detector area of ​​the dose estimation unit 23 obtained in step S110 can be to first determine which dose estimation units 23 are turned on, and then determine the detection field area of ​​each of these turned-on dose estimation units 23.

[0120] The body position of the subject presented in the positioning image refers to what the subject in the positioning image looks like / what shooting position the subject is in.

[0121] In some embodiments, step S110 identifies the subject from the positioning image, and determines the body position of the subject presented in the positioning image based on the identified subject. Identifying the subject from the positioning image and determining the body position may be based on machine learning or other methods.

[0122] In some embodiments, after identifying the subject from the positioning image, step S110 further identifies the anatomical structure of the subject within the imaging plane of the detector 20 and then the controller 20, thereby determining the body position of the subject presented by the positioning image.

[0123] Positioning requirements refer to the posture of the subject to be photographed.

[0124] Taking the chest posterior-anterior position as an example, the positioning requirements of this position include the subject placing the backs of his hands on the hips or hugging the imaging surface, bending his elbows as far forward as possible, and turning his shoulders inward and keeping them flat.

[0125] Taking the lateral knee joint position as an example, the position requirement for this position includes the subject's knee flexion at 120 to 130 degrees.

[0126] The current posture information of the subject associated with the positioning requirement refers to: the positioning requirement associated with the body position to be photographed, which anatomical structures are required to have corresponding postures, and what postures of the subject these anatomical structures present in the positioning image.

[0127] Taking the chest posterior-anterior position as an example, the positioning requirements of this position include that the subject places the backs of his hands on the hips or hugs the imaging surface, bends his elbows, and moves forward as much as possible, and turns his shoulders inward and keeps them flat; then the subject's current posture information associated with the positioning requirements includes: the posture information of the subject's hands and shoulders in the positioning image, etc.

[0128] Taking the lateral knee joint position as an example, the positioning requirement of this position includes the subject's knee flexion 120 to 130 degrees; then the subject's current posture information associated with the positioning requirement includes: the posture information of the subject's knees in the positioning image.

[0129] In some embodiments, step S110 obtains a positioning requirement associated with the subject's body position to be photographed, identifies an anatomical structure associated with the subject's body position to be photographed (or an anatomical structure associated with the positioning requirement) from a positioning image, and determines current posture information of the subject associated with the positioning requirement based on the positioning requirement and the identified anatomical structure.

[0130] Foreign matter that affects imaging refers to whether there is foreign matter that affects imaging on the subject or in the region of interest in the positioning image; affecting imaging means that it affects the detector 20 from receiving radiation.

[0131] For example, the person being tested wears a necklace or other metal object.

[0132] In some embodiments, step S110 displays the positioning image, receives a foreign body selection instruction from a user (e.g., a technician) on the positioning image, and determines the foreign body that affects the imaging in the image. For example, the positioning image is displayed on the display function component, and the technician determines the foreign body on the positioning image by inputting an area selection instruction on the positioning image (e.g., clicking on the positioning image using a tool such as a mouse).

[0133] In some embodiments, step S110 automatically identifies foreign matter that affects imaging from the positioning image based on algorithms such as machine learning.

[0134] The above are some explanations of the positioning focus items.

[0135] Step S120: Perform positioning quality control.

[0136] For example, step S120 obtains range information and / or position information of the region of interest, the imaging surface region, and the irradiation field region based on the positioning focus item, and the range information and / or the position information are used for positioning quality control.

[0137] The range information here includes the area size of the region, and the position information here includes the position of the region, such as the position of the center of the region, the positions of the four corners of the region (when the region is a rectangle), etc.

[0138] In some embodiments, step S120, when performing positioning quality control based on range information and / or position information, may be: calculating the position matching degree based on the above range information and / or position information, the position matching degree including: the position matching degree between the region of interest and the imaging surface area, and the position matching degree between the region of interest and the irradiation field area; step S120 performs positioning quality control by displaying the position matching degree.

[0139] The position matching degree between the region of interest and the imaging surface area may include: the position difference between the centers of the region of interest and the imaging surface area; and / or the degree of overlap between the ranges of the region of interest and the imaging surface area, such as the distance value between the corresponding boundaries of the two.

[0140] The position matching degree between the region of interest and the irradiation field area may include: the position difference between the centers of the region of interest and the irradiation field area; and / or the degree of overlap between the ranges of the region of interest and the irradiation field area, such as the distance value between their corresponding boundaries.

[0141] In some embodiments, step S120 displays at least one of the positioning concern items and the position matching degree. For example, at least one of the positioning concern items and the position matching degree is displayed by displaying a functional component. In some embodiments, step S120 performs positioning quality control by displaying one or more of the positioning concern items.

[0142] For example, step S120 displays the area of ​​interest, the imaging surface area, the irradiation field area, the position matching degree, the body position of the subject presented by the positioning image, the body position of the subject to be photographed, the detection field area, the positioning requirements associated with the body position of the subject to be photographed, the current posture information of the subject associated with the positioning requirements, and one or more of foreign objects through the display screen 50.

[0143] For example, step S120 displays the area of ​​interest, the imaging surface area, the irradiation field area, the position matching degree, the body position of the subject presented by the positioning image, the body position of the subject to be photographed, the detection field area, the positioning requirements associated with the body position of the subject to be photographed, the current posture information of the subject associated with the positioning requirements, and one or more of foreign objects through the computer display.

[0144] In some embodiments, the region of interest may be displayed by displaying a schematic diagram, such as an area defined by lines. In some embodiments, the region of interest may be displayed in the form of text and coordinates; for example, the coordinates of the position of the center of the region of interest, the coordinates of the four corners of the region of interest (when the region of interest is a rectangle) are displayed.

[0145] In some embodiments, the imaging surface area can be displayed by displaying a schematic diagram, such as an area defined by lines. In some embodiments, the imaging surface area can be displayed in the form of text and coordinates; for example, the coordinates of the position of the center of the imaging surface area and the coordinates of the four corners of the imaging surface area are displayed.

[0146] In some embodiments, the irradiation field area can be displayed by displaying a schematic diagram, such as an area defined by lines. In some embodiments, the irradiation field area can be displayed in the form of text and coordinates; for example, the coordinates of the position of the center of the irradiation field area and the coordinates of the four corners of the irradiation field area are displayed.

[0147] It can be understood that when coordinates are used to display areas such as areas of interest, imaging surface areas, and irradiation field areas, the origin of the coordinate system is the same. For example, these areas can be displayed in the same image, and then a coordinate system can be established with the center of the image, or a point in the lower left corner of the image, or a point in the upper left corner of the image as the origin.

[0148] In some embodiments, the area defined by the lines may be marked with deviation dimensions to display the position matching degree; the deviation dimensions include one or more of the deviation dimensions of the boundary, the deviation dimensions of the corner points, and the deviation dimensions of the center.

[0149] For example, in the case where the region of interest and the imaging surface area are displayed by the area defined by lines, the position matching degree of the region of interest and the imaging surface area is displayed by marking the deviation size of the area defined by the lines, and the deviation size includes one or more of the deviation size of the corresponding boundaries of the region of interest and the imaging surface area, the deviation size of the corresponding corner points of the region of interest and the imaging surface area, and the deviation size of the center of the region of interest and the imaging surface area.

[0150] For another example, in the case where the region of interest and the irradiation field area are displayed by areas defined by lines, the position matching degree of the region of interest and the irradiation field area is displayed by marking the deviation size of the area defined by the lines, and the deviation size includes one or more of the deviation size of the corresponding boundaries of the region of interest and the irradiation field area, the deviation size of the corresponding corner points of the region of interest and the irradiation field area, and the deviation size of the center of the region of interest and the irradiation field area.

[0151] For another example, in the case where the imaging surface area and the irradiation field area are displayed by the area defined by lines, the position matching degree of the imaging surface area and the irradiation field area is displayed by marking the deviation size of the area defined by the lines, and the deviation size includes one or more of the deviation size of the corresponding boundaries of the imaging surface area and the irradiation field area, the deviation size of the corresponding corner points of the imaging surface area and the irradiation field area, and the deviation size of the center of the imaging surface area and the irradiation field area.

[0152] In some embodiments, the position matching degree can be displayed in the form of text and coordinates. For example, for the position matching degree of the region of interest and the imaging surface area, the coordinates of the centers of the two are obtained, and the position difference of the centers of the two is calculated to form a new coordinate; for example, the coordinates of the center of the region of interest are (x1, y1), and the coordinates of the center of the imaging surface area are (x2, y2), then the position difference of the centers of the two is calculated to form a new coordinate (x1-x2, y1-y2), and the difference in the coordinates of the corresponding angles of the region of interest and the imaging surface area can also be calculated to form a new coordinate to represent the position matching degree of the two; the position matching degree of the region of interest and the irradiation field area, and the position matching degree of the imaging surface area and the irradiation field area are similar, and will not be repeated here.

[0153] In some embodiments, the body position of the subject presented by the positioning image may be displayed by text.

[0154] In some embodiments, the body position of the subject to be photographed may be displayed by text.

[0155] In some embodiments, the detection field area can be displayed by displaying a schematic diagram, such as an area defined by lines. In some embodiments, the detection field area can be displayed in the form of text and coordinates; for example, the coordinates of the center of the detection field area and the coordinates of the four corners of the detection field area are displayed.

[0156] In some embodiments, the positioning requirements associated with the subject's body position to be photographed may be displayed via graphics and / or text.

[0157] In some embodiments, the current posture information of the subject associated with the positioning requirement may be displayed in text.

[0158] In some embodiments, foreign matter that affects the imaging may be displayed by text or graphics. It is understandable that the foreign matter is displayed only when there is a foreign matter.

[0159] In some embodiments, step S120 generates and displays a positioning quality control image, and the positioning quality control image includes an auxiliary image. The auxiliary image can be a positioning image or a schematic image obtained based on the positioning image. The schematic image obtained based on the positioning image can be, for example, obtaining the contours of the subject and the detector on the basis of the positioning image, and then displaying an image with the contours of the subject and the detector as the above-mentioned schematic image. In some embodiments, the positioning quality control image includes one or more of the positioning focus items. In some embodiments, the positioning quality control image includes a position matching degree. In some embodiments, the positioning quality control image includes the subject's body position to be photographed.

[0160] For example, one or more of the region of interest, the imaging surface region, the irradiation field region, and the detection field region are displayed by superimposing a schematic graphic on the auxiliary image; in some embodiments, the schematic graphic includes a region defined by lines. In order to distinguish different regions (e.g., the region of interest, the imaging surface region, and the irradiation field region, etc.), different regions can be defined by lines of different types and / or different colors. The type of line refers to a solid line, a dotted line, and the like.

[0161] Furthermore, the position matching degree can be displayed on the positioning quality control image by marking the deviation size of the area defined by the lines.

[0162] In some embodiments, when there is a foreign object that affects the imaging, the foreign object can be displayed by drawing or circling the foreign object on the auxiliary image included in the positioning quality control image.

[0163] In some embodiments, step S120 displays at least one of the positioning concern item and the position matching degree by projection. For example, step S120 displays the region of interest by projection onto the subject, wherein the region of interest displayed by projection is consistent with the position of the actual region of interest of the subject. For example, step S120 displays the imaging surface area by projection onto the subject, wherein the imaging surface area displayed by projection is consistent with the position of the actual imaging surface area of ​​the detector. For example, step S120 displays the irradiation field area by projection onto the subject, wherein the irradiation field area displayed by projection is consistent with the position of the actual irradiation field area of ​​the radiation source. For example, step S120 displays the detection field area by projection onto the subject, wherein the detection field area displayed by projection is consistent with the position of the actual detection field area of ​​the dose estimation unit. For example, step S120 displays the position matching degree by projection onto the subject.

[0164] In the example of displaying some positioning focus items by projection, it can be understood that the processor 30 can send the projection information to the projection device connected to the device, or the device itself can include the projection device.

[0165] In some embodiments, step S120, when performing positioning quality control based on range information and / or position information, may be: performing quality control based on range information and / or position information of the region of interest, the imaging surface region, and the irradiation field region to obtain quality control result items, the quality control result items including imaging surface quality control result items and irradiation field quality control result items, and step S120 performs positioning quality control by displaying the imaging surface quality control result items and the irradiation field quality control result items.

[0166] In some embodiments, step S120 can perform quality control based on the positioning focus items to obtain quality control result items, and the quality control result items also include: one or more of the detection field quality control result items, the body position quality control result items, the posture quality control result items and the foreign matter quality control result items; step S120 detects one or more of the field quality control result items, the body position quality control result items, the posture quality control result items and the foreign matter quality control result items.

[0167] Each quality control result item is described below.

[0168] The imaging surface quality control result item is used to indicate whether the range and / or position of the region of interest and the imaging surface area meet the required quality control results. Whether the range of the region of interest and the imaging surface area meets the requirements may refer to the degree of overlap between the two, such as the distance value of the corresponding boundaries of the two. Whether the position of the region of interest and the imaging surface area meets the requirements may refer to the position difference of the centers of the two.

[0169] In some embodiments, the imaging surface quality control result item is used to indicate whether the center of the region of interest and the imaging surface area are within a preset deviation. In some embodiments, the imaging surface quality control result item is used to indicate whether the boundary of the region of interest and the imaging surface area is within a preset deviation.

[0170] For example, if the centers of the region of interest and the imaging surface area are within a preset deviation, it means that the positions of the region of interest and the imaging surface area meet the requirements. For another example, if the boundaries of the region of interest and the imaging surface area (referring to all corresponding boundaries) are within a preset deviation, it means that the range of the region of interest and the imaging surface area meets the requirements.

[0171] The irradiation field quality control result item is used to indicate whether the range and / or position of the region of interest and the irradiation field area meet the required quality control results. Whether the range of the region of interest and the irradiation field area meets the requirements may refer to the degree of overlap between the two, such as the distance value of the corresponding boundaries of the two. Whether the position of the region of interest and the irradiation field area meets the requirements may refer to the position difference of the centers of the two.

[0172] In some embodiments, the irradiation field quality control result item is used to indicate whether the center of the region of interest and the irradiation field area are within a preset deviation. In some embodiments, the irradiation field quality control result item is used to indicate whether the boundary of the region of interest and the irradiation field area are within a preset deviation.

[0173] For example, if the centers of the region of interest and the irradiation field area are within a preset deviation, it means that the positions of the region of interest and the irradiation field area meet the requirements. For another example, if the boundaries of the region of interest and the irradiation field area (referring to all corresponding boundaries) are within a preset deviation, it means that the ranges of the region of interest and the irradiation field area meet the requirements.

[0174] The body position quality control result item is used to indicate whether the body position of the subject presented in the positioning image meets the required quality control result. In some embodiments, the body position quality control result item is used to indicate whether the body position of the subject presented in the positioning image is the body position to be photographed of the subject.

[0175] For example, if the body position of the subject to be photographed is the chest posterior-anterior position, and the body position of the subject presented in the positioning image is also the chest posterior-anterior position, then it means that the body position of the subject presented in the positioning image meets the requirements and the quality control passes; otherwise, it does not meet the requirements and the quality control fails.

[0176] The posture quality control result item is used to indicate whether the current posture information of the subject associated with the positioning requirement satisfies the required quality control result. In some embodiments, the posture quality control result item is used to indicate whether the posture information of the anatomical structure involved in (associated with) the positioning requirement associated with the subject's to-be-photographed body position in the current posture information of the subject associated with the positioning requirement meets the posture required by the positioning requirement associated with the subject's to-be-photographed body position.

[0177] Taking the chest posterior-anterior position as an example, the positioning requirements of the body position to be photographed include that the backs of the hands of the subject are placed on the hips or hugging the imaging surface, the elbows are bent and as forward as possible, and the shoulders are inwardly rotated and flat; therefore, the posture information of the anatomical structures involved in (associated with) the positioning requirements associated with the body position to be photographed of the subject is obtained, such as the posture information of the hands, the posture information of the elbows, the posture information of the shoulders, etc., to calculate the height difference between the bilateral acromion peaks, the angle of the elbows, etc., to determine whether the posture information of these anatomical structures meets the posture required by the positioning requirements.

[0178] Taking the lateral knee joint position as an example, the positioning requirement includes flexing the knee to 120 to 130 degrees. Therefore, the anatomical structures associated with the positioning requirement are identified, such as identifying and calculating the knee flexion angle, to determine whether the posture information of these anatomical structures meets the posture required by the positioning requirement.

[0179] The detection field quality control result item is used to indicate whether the detection field area is within the region of interest and / or whether the detection field area is a quality control result of the detection field area that should be selected and enabled.

[0180] The foreign matter control result item is used to indicate the quality control result of whether foreign matter exists and / or whether foreign matter exists in the region of interest.

[0181] In some embodiments, step S120 generates and displays a positioning quality control image, and the positioning quality control image includes an auxiliary image. The auxiliary image can be a positioning image or a schematic image obtained based on the positioning image. The schematic image obtained based on the positioning image can be, for example, obtaining the contours of the subject and the detector based on the positioning image, and then displaying an image with the contours of the subject and the detector as the above-mentioned schematic image. In some embodiments, the positioning quality control image includes one or more of the quality control result items.

[0182] In some embodiments, the technician can select the body position of the subject to be photographed on the human-computer interaction interface. Fig.11 In some embodiments, the radioactive ray imaging method further includes step S180: displaying the subject's photographable body positions on the human-computer interaction interface; and step S190: determining the subject's to-be-photographed body position from the photographable body positions in response to an instruction to select the photographable body positions.

[0183] Please refer to Fig.12 In some embodiments, the radioactive ray imaging method may further include step S140: motion detection after positioning. Step S130: obtaining a positioning image after positioning is completed, determining whether the subject is moving based on the positioning image after positioning is completed and the positioning image obtained thereafter, and if moving, generating prompt information for indicating the motion state.

[0184] For example, step S130 identifies the positions of features (such as contours and key points, etc.) in the image based on the positioning images of different frames, and compares their position changes in the positioning images of different frames, so as to obtain the moving distance and moving speed, and then form a moving trajectory, etc.; it is also possible to determine the difference between the matching pixel points in a certain area of ​​the image in a time period, and then obtain the moving distance and speed, etc.

[0185] Please refer to Fig.13 In some embodiments, the radioactive ray imaging method may further include step S140, obtaining and outputting a prompt item. For example, step S140 obtains a prompt item based on a quality control result item, and the prompt item is used to indicate the result caused when the quality control result item does not meet the requirements; and outputs the prompt item. The prompt item may be output by display and / or voice playback.

[0186] When the quality control result item does not meet the requirements, a prompt item is generated and output to prompt the result caused when the quality control result item does not meet the requirements, which helps inexperienced technicians to better perform subsequent positioning operations. For example, when the imaging surface quality control result item does not meet the requirements, the prompt items include radiological image center offset and anatomical truncation; when the irradiation field quality control result item does not meet the requirements, the prompt items include radiological image center offset, anatomical truncation, and excessive irradiation (radiation) area; when the detection field quality control result item does not meet the requirements, the prompt items include insufficient image dose; when the foreign matter quality control result item does not meet the requirements, that is, there are foreign matter and / or foreign matter in the area of ​​interest, the prompt items include possible occlusion of the diagnostic area; when the body position quality control result item does not meet the requirements, the prompt items include body position shooting errors; when the posture quality control result item does not meet the requirements, the prompt items include non-standard positioning posture, etc.

[0187] Please refer to Fig.14 In some embodiments, the method of radioactive ray imaging may further include step S150: generating a guidance item, outputting a guidance item, and / or controlling the device to perform an action based on the guidance item; for example, step S150 obtains a guidance item based on a quality control result item, and the guidance item is used to indicate the execution action guided when the quality control result item does not meet the requirements.

[0188] In some embodiments, the guidance items include at least one of the following: guidance prompts for the position and / or angle of the detector; guidance prompts for the position and / or angle of the radiation source; guidance prompts for the size of the irradiation field area; guidance prompts for the selection of the detection field area; prompts for guiding the subject to move so that the imaging surface quality control result item and / or the irradiation field quality control result item meet the requirements; prompts for guiding the subject's positioning posture so that the body position quality control result item and / or the posture quality control result item meet the requirements.

[0189] The guidance item may be outputted by display and / or voice playback.

[0190] In some embodiments, the guidance items may include two categories of guidance items, such as first-category guidance items and second-category guidance items. The first-category guidance items are used to be output, such as by display and / or voice playback, to guide the person being tested or the technician. The second-category guidance items can be acquired by the processor 30 to control the corresponding components of the equipment to perform corresponding actions so that the quality control result items are restored to meet the requirements.

[0191] If the technician's positioning is not standard, the processor 30 can guide the position and angle of the detector 20, the processor 30 can guide the position and range of the irradiation field area of ​​the radiation source 10, the processor 30 can guide the position and angle of the radiation source 10, and the processor 30 guides the selection (activation) of the dose estimation unit 23.

[0192] Technicians can make manual modifications based on the boot items.

[0193] In some embodiments, the positioning image is an image acquired in real time, and when the positioning image changes, the positioning focus item is updated in real time. In some embodiments, the position matching degree is also updated in real time.

[0194] In some embodiments, the positioning image is an image acquired in real time, and when the positioning image changes, the quality control result item is updated in real time. In some embodiments, the prompt item and / or the guide item are also updated in real time.

[0195] Here are some examples.

[0196] Please refer to FIG. 15( a ), which is a schematic diagram of a positioning image. The chest of the subject is close to the detector 20 and is located at the shooting position between the detector 20 and the radiation source 10 (not shown in the figure).

[0197] FIG15( b) is an example of a positioning quality control image 100, which includes an auxiliary image, which is a positioning image or a schematic diagram thereof; the region of interest, imaging surface area, irradiation field area and detection field area are superimposed on the auxiliary image, wherein the region 01 defined by the solid line frame represents the region of interest, the region 02 defined by the dotted dashed line frame represents the imaging surface area of ​​the detector 20, the region 03 defined by the linear dashed line frame represents the irradiation field area of ​​the radiation source 10, and the gray-filled rectangular region 04 represents the detection field area of ​​the dose estimation unit 23, and the figure shows three detection field areas of the dose estimation units 23; in the positioning quality control image Image 100 also displays the body position of the subject presented in the positioning image, the body position to be photographed of the subject, the position matching degree, the positioning requirements and the current posture information of the subject associated with the positioning requirements; wherein the item "body position in the image" refers to the body position of the subject presented in the positioning image, and the item "body position to be photographed" refers to the body position of the subject that actually needs to be tested, for example, the body position to be photographed selected by the technician for the subject through the human-computer interaction interface; in the positioning quality control image 100, the "center difference (120,30)" between the region of interest and the imaging surface area refers to the difference in coordinates between the center of the region of interest and the imaging surface area. The coordinate difference of the X-axis is 120, and the coordinate difference of the Y-axis is 30, both in millimeters. The "edge gap (54, 60, 184, 20)" between the region of interest and the imaging surface area refers to the distance between the corresponding boundaries of the region of interest and the imaging surface area. Since the two are rectangular in the figure, there are four corresponding boundaries: top, bottom, left, and right. Therefore, the edge / boundary gaps are 54, 60, 184, and 20, respectively, and the units are all millimeters. Similarly, in the positioning quality control image 100, the "center gap (120, 30)" between the region of interest and the irradiation field area refers to the difference in coordinates of the centers of the region of interest and the irradiation field area. The coordinate difference of the X-axis is 120, and the coordinate difference of the Y-axis is 30, both in millimeters; the "edge gap (54, 60, 184, 10)" between the region of interest and the irradiation field area refers to the distance between the corresponding boundaries of the region of interest and the irradiation field area. Since the two are rectangular in the figure, there are four corresponding boundaries: top, bottom, left, and right, so the edge / boundary gaps are 80, 30, 133, and 10, respectively, and the units are all in millimeters; it should be noted that these values ​​in the figure are only used for schematic examples; in the positioning quality control image 100, the "current positioning posture" item refers to the current posture information of the subject associated with the positioning requirement.

[0198] FIG15( c ) is an example of a positioning quality control image 100 , which includes an auxiliary image, which is a positioning image or a schematic diagram thereof; the quality control result items displayed in the positioning quality control image 100 , wherein a check mark after the quality control result item indicates that the corresponding quality control result item meets the requirements, and a cross after the quality control result item indicates that the corresponding quality control result item does not meet the requirements. In addition, the region of interest, the imaging surface area, the irradiation field area and the detection field area can be superimposed on the auxiliary image, wherein the region 01 defined by the solid line frame indicates the region of interest, the region 02 defined by the dotted dashed line frame indicates the imaging surface area of ​​the detector 20, the region 03 defined by the line dashed line frame indicates the irradiation field area of ​​the radiation source 10, and the gray-filled rectangular region 04 indicates the detection field area of ​​the dose estimation unit 23 , and the figure shows three detection field areas of the dose estimation units 23 .

[0199] FIG15( d ) is an example of a positioning quality control image 100 . Prompt items are also displayed on the positioning quality control image 100 . In the figure, the imaging surface quality control result item and the irradiation field quality control result item do not meet the requirements, so the corresponding prompt items of the two are displayed.

[0200] FIG15( e) is an example of a positioning quality control image 100, on which more positioning focus items are displayed. The item “Position in the image” refers to the body position of the subject as presented in the positioning image, and the item “Position to be photographed” refers to the body position of the subject that actually needs to be examined, for example, the body position to be photographed selected by the technician for the subject through the human-computer interaction interface.

[0201] Fig.16 Another example of the positioning quality control image 100 is shown. On the positioning image included in the positioning quality control image 100, the region of interest, the imaging surface region and the irradiation field region are displayed by the region defined by the lines, and the position matching degree is displayed by marking the deviation size of the region defined by the lines. It can be seen in the figure that the person being tested stands directly in front of the detector 20. There are two upper dotted boxes in the figure. The small dotted box represents the irradiation field region, the large dotted box represents the imaging surface region, and the solid box represents the region of interest. It can be seen in the figure that the center positions of the irradiation field region and the imaging surface region coincide, and the center position of the region of interest is 120 mm away from the center positions of the two, the left boundary of the region of interest is 54 mm away from the left boundary of the imaging surface region, and the left boundary of the region of interest is 104 mm away from the left boundary of the irradiation field region.

[0202] Fig.17 This is an example of displaying positioning requirements. The positioning requirements can be explained by displaying a standard positioning diagram and providing text descriptions.

[0203] Fig.18 This is an example of displaying the positioning focus item by projection. In the figure, the region of interest is directly projected onto the subject, and the region of interest displayed by the projection is consistent with the position of the actual region of interest of the subject.

[0204] FIG. 19( a ) is an example of a positioning quality control image 100 , in which the quality control items represent the quality control result items in this article, “imaging surface center and range” represents the imaging surface quality control result item, “irradiation field center and range” represents the irradiation field quality control result item, “ionization chamber selection” represents the detection field quality control result item, “no non-medical foreign matter” represents the foreign matter quality control result item, “current body position is consistent with the selected body position” represents the body position quality control result item, and “body position specific positioning requirements are correct” represents the posture quality control result item; different background colors can be used to indicate whether the corresponding quality control result item meets or does not meet the requirements, for example, if the background color of the quality control result item is red, it means that the requirements are not met, and if it is green, it means that the requirements are met. FIG. 19( b ) is an example of a positioning quality control image 100 , a quality control result item with a check mark indicates that the corresponding quality control result item meets the requirements, and a quality control result item with a cross indicates that the corresponding quality control result item does not meet the requirements.

[0205] FIG20(a) is an example of a guide item, which is used to illustrate the guide items corresponding to the imaging surface quality control result items and the guide items corresponding to the irradiation field quality control result items. In FIG20(a), the left area shows a schematic diagram of a subject, in which the display form of the subject is associated with the body position to be photographed. Since the figure shows that the subject needs to take a chest X-ray, the subject is displayed from the front. In the schematic diagram of the subject, three positioning focus items are displayed, as shown in the three dotted boxes selected on the subject. The three dotted boxes are, from top to bottom, the region of interest, the imaging surface region, and the irradiation field region. It can be seen that the region of interest The center of the region is far away from the centers of the other two in the vertical direction of the figure, which is detected by the quality control through the imaging surface quality control result item and the irradiation field quality control result item. Then, the corresponding guidance item is generated, prompting the detector 20 (such as a flat plate) to move n centimeters upward, and the radiation source 10 also needs to move so that its irradiation field area also moves n centimeters upward, and the predicted new positions of the region of interest, the imaging surface area and the irradiation field area after the move are displayed on the right side of the figure; the detector 20 and the radiation source 10 can be manually controlled by the technician to move, or the device can automatically control the movement of the detector 20 and / or the radiation source 10 based on the guidance item. Figure 20 (b) is an example of a guidance item, which is used to illustrate the guidance item corresponding to the detection field quality control result item. In FIG. 20( b ), the left area shows a schematic diagram of a subject, and the region of interest and the imaging surface area are shown on the subject, and the imaging surface quality control result item meets the requirements; the detection field areas of three estimation units are also shown on the subject on the left, and the estimation unit in the figure is illustrated as an ionization chamber. Among the three detection field areas in the figure, the gray-filled ones represent the detection field areas that are turned on, and the ones that are not filled with gray represent the detection field areas that are turned off. Therefore, on the subject on the left, the upper two detection field areas are turned on, and the lower one is turned off. Since the current position of the subject to be photographed requires that the lower one is turned on and located in the region of interest, the detection field quality control result item indicates that it does not meet the requirements, and a guide item is generated and it is prompted in the figure that the lower one needs to be selected to be turned on. This can be manually controlled by the technician to turn on and off the detection field area of ​​the estimation unit, or the device can automatically control the opening and closing of the detection field area of ​​the corresponding estimation unit based on the guide item; the subject on the right in the figure shows a schematic diagram corrected based on the guide item.

[0206] Figures 21(a) and 21(b) are two examples of motion detection after positioning in step S130. In Figure 21(a), an image of the correct posture after positioning is completed is obtained and displayed, and then the real-time positioning image can be displayed separately or simultaneously, and motion detection is performed, and the corresponding motion information is displayed next to the real-time positioning image, including displacement and / or speed, such as the horizontal displacement and vertical displacement of the subject (the unit can be millimeters), and the motion speed of the subject, such as the horizontal speed and vertical speed of the subject. Figure 21(b) is similar to Figure 21(a). In addition to displaying the motion information such as the displacement and speed of the subject next to the real-time positioning image, this information can also be displayed on the subject, for example, the direction of displacement and speed is indicated by arrows on the subject, and the corresponding speed and displacement information is marked.

[0207] This document is described with reference to various exemplary embodiments. However, those skilled in the art will recognize that changes and modifications may be made to the exemplary embodiments without departing from the scope of this document. For example, various operating steps and components for performing the operating steps may be implemented in different ways (e.g., one or more steps may be deleted, modified, or incorporated into other steps) depending on the specific application or considering any number of cost functions associated with the operation of the system.

[0208] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. In addition, as understood by those skilled in the art, the principles of this article can be reflected in a computer program product on a computer-readable storage medium, which is pre-installed with a computer-readable program code. Any tangible, non-temporary computer-readable storage medium can be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD to ROM, DVD, Blu Ray disks, etc.), flash memory and / or the like. These computer program instructions can be loaded onto a general-purpose computer, a special-purpose computer or other programmable data processing device to form a machine, so that these instructions executed on a computer or other programmable data processing device can generate a device that implements a specified function. These computer program instructions can also be stored in a computer-readable memory, which can instruct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory can form a manufactured product, including an implementation device that implements a specified function. Computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on a computer or other programmable device to generate a computer-implemented process, so that the instructions executed on a computer or other programmable device can provide steps for implementing a specified function.

[0209] Although the principles of this invention have been shown in various embodiments, many modifications of structures, arrangements, proportions, elements, materials and components particularly suitable for specific environments and operational requirements can be used without departing from the principles and scope of this invention. The above modifications and other changes or amendments will be included in the scope of this invention.

[0210] The foregoing specific description has been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of the present disclosure. Therefore, the consideration of the present disclosure will be illustrative rather than restrictive, and all these modifications will be included in its scope. Similarly, the advantages, other advantages and solutions to the problems of various embodiments have been described above. However, the benefits, advantages, solutions to the problems and any elements that can produce these, or make them more clear, should not be interpreted as critical, necessary or necessary. The term "include" and any other variants used in this article are all non-exclusive inclusions, so that the process, method, article or device including the list of elements not only includes these elements, but also includes other elements that are not explicitly listed or do not belong to the process, method, system, article or device. In addition, the term "coupled" and any other variants used in this article refer to physical connections, electrical connections, magnetic connections, optical connections, communication connections, functional connections and / or any other connections.

[0211] Those skilled in the art will appreciate that many changes may be made to the details of the above-described embodiments without departing from the basic principles of the invention. Therefore, the scope of the present invention should be determined solely by the claims.

Claims

1. A method for radioactive ray imaging, characterized in that: include: Acquire a positioning image, wherein the positioning image is an image of the subject at a shooting position between the radiation source and the detector; Acquire positioning focus items on the image based on the positioning image; wherein the positioning focus items include the area of ​​interest of the subject, the imaging surface area of ​​the detector, and the irradiation field area of ​​the radiation source irradiating the subject; Based on the positioning focus item, range information and / or position information of the region of interest, the imaging surface area and the irradiation field area are acquired, and the range information and / or the position information are used for positioning quality control.

2. The method according to claim 1, characterized in that The range information and / or the position information are used for positioning quality control, including: calculating the position matching degree based on the range information and / or the position information, the position matching degree including: the position matching degree between the region of interest and the imaging surface area, and the position matching degree between the region of interest and the irradiation field area; positioning quality control is performed by displaying the position matching degree.

3. The method according to claim 1, characterized in that The positioning focus items also include one or more of the detection field area of ​​the dose estimation unit, the body position of the subject presented by the positioning image, the positioning requirements, the current posture information of the subject associated with the positioning requirements, and foreign matter that affects imaging.

4. The method according to any one of claims 1 to 3, characterized in that The method further includes: performing positioning quality control by displaying one or more of the positioning focus items.

5. The method according to claim 4, characterized in that The displaying of one or more of the positioning concern items includes: generating and displaying a positioning quality control image, the positioning quality control image including an auxiliary image, the positioning quality control image also including one or more of the positioning concern items; the auxiliary image is the positioning image or a schematic image obtained based on the positioning image.

6. The method according to claim 5, characterized in that The positioning quality control image displays the region of interest, the imaging surface area and the irradiation field area by superimposing a schematic diagram on the auxiliary image contained therein; preferably, the schematic diagram includes an area defined by lines; and / or, displaying the region of interest, the imaging surface area and the irradiation field area in the positioning quality control image in the form of text and coordinates; And / or, the position matching degree is displayed in the positioning quality control image in the form of text and coordinates.

7. The method according to claim 6, characterized in that The position matching degree is displayed on the positioning quality control image by marking the deviation size of the area defined by the lines, and the deviation size includes one or more of the deviation size of the boundary, the deviation size of the corner point and the deviation size of the center.

8. The method according to claim 3, characterized in that The acquiring of the positioning focus items on the image based on the positioning image includes: displaying the positioning image, and receiving a region selection instruction from a user on the positioning image to determine the region of interest; or, identifying an anatomical structure associated with the body position to be photographed of the subject from the positioning image, and generating the region of interest based on the anatomical structure.

9. The method according to claim 3, characterized in that The acquiring the positioning focus item on the image based on the positioning image includes: Acquiring a positioning requirement associated with the body position to be photographed of the subject; Identifying, from the positioning image, an anatomical structure associated with the body position to be photographed of the subject; Based on the positioning requirement and the identified anatomical structure, current posture information of the subject associated with the positioning requirement is determined.

10. The method according to claim 1, characterized in that The method further includes: acquiring a positioning image after the positioning is completed, determining whether the subject is moving based on the positioning image after the positioning is completed and a positioning image acquired thereafter, and if moving, generating prompt information for indicating the moving state.

11. The method according to claim 4, characterized in that The displaying of the positioning focus item includes: displaying by projection, wherein: Displaying the region of interest by projecting onto the subject, wherein the region of interest displayed by projection is consistent with the position of the actual region of interest of the subject; and / or, Displaying the imaging surface area by projecting onto the subject, wherein the imaging surface area displayed by projection is consistent with the position of the actual imaging surface area of ​​the detector; and / or, Displaying the irradiation field area by projecting onto the subject, wherein the irradiation field area displayed by the projection is consistent with the position of the actual irradiation field of the radiation source; and / or, Displaying the detection field area by projecting it onto the subject, wherein the detection field area displayed by the projection is consistent with the position of the actual detection field area of ​​the dose estimation unit; and / or, The position matching degree is displayed by projecting onto the detected person.

12. The method according to claim 1 or 3, characterized in that: The positioning image is an image acquired in real time, and when the positioning image changes, the positioning focus item is updated in real time.

13. The method according to claim 1 or 3, characterized in that: The range information and / or the position information are used for positioning quality control, including: performing quality control based on the range information and / or the position information to obtain quality control result items, the quality control result items including imaging surface quality control result items and irradiation field quality control result items, the imaging surface quality control result items are used to indicate whether the range and / or position of the region of interest and the imaging surface area meet the required quality control results, and the irradiation field quality control result items are used to indicate whether the range and / or position of the region of interest and the irradiation field area meet the required quality control results; positioning quality control is performed by displaying the imaging surface quality control result items and the irradiation field quality control result items.

14. The method according to claim 3 or 13, characterized in that The method further includes: performing quality control based on the positioning focus item to obtain a quality control result item, the quality control result item further includes: one or more of a detection field quality control result item, a body position quality control result item, a posture quality control result item and a foreign matter quality control result item; wherein the body position quality control result item is used to indicate whether the body position of the subject presented by the positioning image meets the required quality control result, the posture quality control result item is used to indicate whether the current posture information of the subject associated with the positioning requirement meets the required quality control result, the detection field quality control result item is used to indicate whether the detection field area is within the region of interest and / or whether the detection field area is a quality control result of the detection field area that should be selected to be turned on, and the foreign matter quality control result item is used to indicate whether there is a foreign body and / or whether a foreign body exists in the region of interest; Display one or more of the detection field quality control result items, the body position quality control result items, the posture quality control result items and the foreign matter quality control result items.

15. The method according to claim 13 or 14, characterized in that: The imaging surface quality control result item is used to indicate: whether the center of the region of interest and the imaging surface area is within a preset deviation; and / or whether the boundary of the region of interest and the imaging surface area is within a preset deviation; and / or, The irradiation field quality control result item is used to indicate: whether the center of the region of interest and the irradiation field area is within a preset deviation; and / or whether the boundary of the region of interest and the irradiation field area is within a preset deviation; and / or, The body position quality control result item is used to indicate whether the body position of the subject presented by the positioning image is the body position to be photographed of the subject; and / or, The posture quality control result item is used to indicate whether the posture information of the anatomical structure associated with the body position to be photographed of the subject in the current posture information of the subject associated with the positioning requirement meets the posture required by the positioning requirement associated with the body position to be photographed of the subject.

16. The method according to claim 13 or 14, characterized in that The method further includes: obtaining a prompt item based on the quality control result item, the prompt item being used to indicate a result caused when the quality control result item does not meet the requirement; The prompt item is output.

17. The method according to claim 13 or 14, characterized in that The method further includes: acquiring a guidance item based on the quality control result item, the guidance item being used to indicate a guided execution action when the quality control result item does not meet the requirement; outputting the boot item; and / or controlling the device to execute an action based on the boot item.

18. The method according to claim 17, characterized in that The guide item includes at least one of the following: Guidance prompts for the position and / or angle of the detector; Guidance prompts for the position and / or angle of the ray source; Guidance prompts for the size of the irradiation field area; A guidance prompt for selecting the detection field area; Guiding the subject to move so that the imaging surface quality control result item and / or the irradiation field quality control result item meet the required prompt; Guiding the subject to position his / her posture so that the body position quality control result item and / or posture quality control result item meet the required prompts.

19. The method of claim 1, wherein: The method further includes: displaying the photographable body positions of the detected person on a human-computer interaction interface; and determining the body position of the detected person to be photographed from the photographable body positions in response to a selection instruction for the photographable body positions.

20. A radioactive ray imaging device, characterized in that: include: A radiation source, used for emitting radioactive rays to the person being tested; A detector for receiving radioactive rays transmitted through the subject; as well as, A processor, configured to execute the method according to any one of claims 1 to 19.

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