Exposure parameter setting method of DR imaging system and DR imaging system

Abstract

An exposure parameter setting method of a DR imaging system and the DR imaging system, the system comprising an X-ray generator, a flat panel detector and a camera, the method comprising: acquiring a patient image of a patient to be imaged collected by the camera; determining a body thickness value of the patient to be imaged based on the patient image; acquiring a predetermined functional relationship between a tube voltage and the body thickness value, and determining the tube voltage corresponding to the body thickness value according to the functional relationship; acquiring a predetermined target human body exit dose, and determining a target human body entrance dose according to the target human body exit dose, the body thickness value and the tube voltage; determining a current-time product according to the target human body entrance dose; controlling the X-ray generator to emit X-rays based on the current-time product and the tube voltage, and controlling the flat panel detector to receive the X-rays after passing through the patient to be imaged and generate an electrical signal; and generating a DR image based on the electrical signal. The method can automatically set the exposure parameters according to the body thickness value, and can improve the accuracy of the exposure parameters.

Description

Technical Field

[0001] This invention relates to the field of medical imaging technology, and more specifically to a method for setting exposure parameters for a DR imaging system and a DR imaging system. Background Technology

[0002] Digital radiography (DR) images, a common type of medical digital imaging, are widely used in physical examinations and routine medical imaging diagnosis. DR imaging systems use a flat-panel detector to convert X-rays passing through the human body into electrical signals, forming DR images. The X-ray dose received by the flat-panel detector has a significant impact on image quality. Therefore, to ensure image quality, it is necessary to set appropriate exposure parameters to ensure that the X-ray dose reaching the flat-panel detector surface is consistent across different body types and tissues, thus avoiding overexposure or underexposure and ensuring the signal remains within a reasonable range. Even with a consistent X-ray dose, different combinations of exposure parameters can affect the imaging effect; therefore, it is also necessary to coordinate different exposure parameters to ensure image quality.

[0003] Currently, a mainstream approach to determining exposure parameters is to provide three body types: "fat," "medium," and "thin." Each body type has a set of default recommended exposure parameters, which are then recommended based on the body type selected by the user before imaging. However, each body type corresponds to a range of body thicknesses, resulting in relatively low accuracy. Users still need to manually fine-tune the parameters according to the patient's actual condition.

[0004] Another mainstream approach is to use an automatic exposure control (AEC) system, which ensures the flat panel detector receives an appropriate dose. However, AEC can only control the current-time product (mAs), and the choice of tube voltage (kV) affects penetration, thus impacting image quality. Furthermore, AEC has limitations in its application scenarios; it is only effective if human tissue can completely cover the ionization chamber. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] One embodiment of the present invention provides a method for setting exposure parameters of a DR imaging system, the DR imaging system including an X-ray generator, a flat panel detector, and a camera, the method comprising:

[0007] Acquire the patient image of the patient to be imaged captured by the camera;

[0008] The body thickness value of the patient to be imaged is determined based on the patient image;

[0009] Obtain a predetermined functional relationship between tube voltage and body thickness, and determine the tube voltage corresponding to the body thickness based on the functional relationship;

[0010] Obtain a predetermined target human body emission dose, and determine the target human body incident dose based on the target human body emission dose, the body thickness value, and the tube voltage;

[0011] The current-time product is determined based on the incident dose to the target human body.

[0012] The X-ray generator is controlled to emit X-rays based on the current-time product and the tube voltage, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged and generate an electrical signal.

[0013] A DR image is generated based on the electrical signal.

[0014] In one embodiment, the tube voltage is linearly proportional to the body thickness.

[0015] In one embodiment, determining the functional relationship includes:

[0016] Obtain recommended exposure parameters corresponding to at least two different body thickness values, wherein the recommended exposure parameters include at least a recommended tube voltage;

[0017] The functional relationship is determined based on the at least two different body thickness values ​​and their corresponding recommended tube voltages.

[0018] In one embodiment, the target human body emission dose is exponentially related to the body thickness.

[0019] In one embodiment, the incident dose to the target human body is proportional to the current-time product.

[0020] In one embodiment, obtaining the predetermined target human body emission dose includes:

[0021] Obtain recommended exposure parameters corresponding to at least two different body thickness values, wherein the recommended exposure parameters include at least a recommended tube voltage and a recommended current-time product;

[0022] The target human body emission dose is determined based on the at least two different body thickness values ​​and their corresponding recommended tube voltage and recommended current-time product.

[0023] In one embodiment, obtaining recommended exposure parameters corresponding to at least two different body thickness values ​​includes:

[0024] Obtain recommended exposure parameters for at least two different body types, as well as typical body thickness values ​​for the at least two different body types.

[0025] In one embodiment, the method further includes:

[0026] Provides automatic parameter setting options and / or manual parameter setting options;

[0027] When a selection operation for the automatic parameter setting option is received, the tube voltage corresponding to the body thickness value is determined according to the functional relationship, and the current-time product is determined according to the incident dose to the target human body.

[0028] When a selection operation for the manual parameter setting option is received, body type options corresponding to the at least two different body types are provided, and a recommended exposure parameter corresponding to the target body type option is determined based on the selection operation for the target body type option among the body type options.

[0029] In one embodiment, the method further includes:

[0030] Determine the current usage status of the filter grid, which includes whether the filter grid is present or absent;

[0031] Select the recommended exposure parameters corresponding to the usage of the filter grid.

[0032] In one embodiment, the method further includes:

[0033] Determine the current imaging position and select the recommended exposure parameters corresponding to the current imaging position.

[0034] Another aspect of this invention provides a method for setting exposure parameters in a DR imaging system, the DR imaging system including an X-ray generator, a flat panel detector, and a body thickness determination device, the method comprising:

[0035] The body thickness value of the patient to be imaged is determined based on the body thickness determination device.

[0036] Determine the current usage status of the filter grid, which includes whether the filter grid is present or absent;

[0037] Obtain the body thickness-exposure parameter model corresponding to the usage of the filter grid; different body thickness-exposure parameter models correspond to the same target human body emission dose.

[0038] Input the volume thickness value into the volume thickness-exposure parameter model to obtain the exposure parameters corresponding to the volume thickness value;

[0039] The X-ray generator is controlled to emit X-rays according to the exposure parameters, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged and generate an electrical signal. The X-rays received by the flat panel detector have the target human body emission dose.

[0040] A DR image is generated based on the electrical signal.

[0041] In one embodiment, the exposure parameters include at least one of the following: tube voltage, tube current, exposure time, and current-time product.

[0042] In one embodiment, the method further includes:

[0043] Provides automatic parameter setting options and / or manual parameter setting options;

[0044] When a selection operation for the automatic parameter setting option is received, the exposure parameters are determined according to the body thickness-exposure parameter model;

[0045] When a selection operation for the manual parameter setting option is received, body type options corresponding to at least two different body types are provided, and the exposure parameters corresponding to the target body type option are determined based on the selection operation for the target body type option among the body type options.

[0046] In one embodiment, the method further includes:

[0047] Determine the current imaging position and select the thickness-exposure parameter model corresponding to the current imaging position.

[0048] In one embodiment, the exposure parameters corresponding to the bulk thickness value include at least the tube voltage, and the method further includes:

[0049] Exposure time is determined based on the ionization chamber during the process of controlling the X-ray generator to emit X-rays and controlling the flat panel detector to receive X-rays after they have passed through the patient to be imaged.

[0050] Another aspect of this invention provides a method for setting exposure parameters in a DR imaging system. The DR imaging system includes an X-ray generator, a flat panel detector, a camera, and a display device. The camera is used to acquire a patient image of a patient to be imaged, so as to determine the body thickness value of the patient to be imaged based on the patient image. The display device is used to output a display interface. The method includes:

[0051] The display interface shows body position options and automatic parameter setting options;

[0052] Receive a selection operation for the position option to determine the imaging position of the patient to be imaged;

[0053] When a selection operation for the automatic parameter setting option is received, the exposure parameters corresponding to the imaging position are automatically determined based on the obtained body thickness value of the patient to be imaged, and the exposure parameters corresponding to the imaging position are displayed on the display interface.

[0054] Based on determined exposure parameters, the X-ray generator is controlled to emit X-rays, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged, and to generate an electrical signal.

[0055] A DR image is generated based on the electrical signal.

[0056] In one embodiment, the method further includes:

[0057] The display interface shows the manual parameter setting option;

[0058] When a selection operation for the manual parameter setting option is received, at least two body type options corresponding to different body types are provided, and the exposure parameters corresponding to the imaging position are determined according to the selection operation of the target body type option among the body type options, and the exposure parameters corresponding to the imaging position are displayed on the display interface.

[0059] In one embodiment, the method further includes:

[0060] The exposure parameters are automatically determined based on the user's modification operation or are determined based on the selection operation of the target body shape option in the body shape options.

[0061] In one embodiment, the exposure parameters include at least one of the following: tube voltage, tube current, exposure time, and current-time product.

[0062] In one embodiment, the method further includes:

[0063] The display interface shows options for using the grid, including an option with a grid and an option without a grid.

[0064] Receive a selection operation for the option with a filter grid or the option without a filter grid;

[0065] When a selection operation for the option with a grid is received, the exposure parameter is the exposure parameter corresponding to the option with a grid; when a selection operation for the option without a grid is received, the exposure parameter is the exposure parameter corresponding to the option without a grid.

[0066] This invention also provides a DR imaging system, which includes: an X-ray generator, a flat panel detector, a display, a body thickness determination device, and a processor, wherein:

[0067] The X-ray generator is used to emit X-rays toward the patient to be imaged;

[0068] The flat panel detector is used to receive X-rays after they pass through the patient to be imaged and to generate electrical signals;

[0069] The body thickness determination device is used to obtain the body thickness value of the patient to be imaged.

[0070] The processor is used to process the electrical signal to obtain a DR image, and the processor is also used to perform the method described above;

[0071] The display is used to output a display interface under the control of the processor.

[0072] The exposure parameter setting method of the DR imaging system and the automatic setting of exposure parameters based on the body thickness value in the embodiments of the present invention enable the expected X-ray dose to be obtained when imaging for different body thickness values, thereby improving the accuracy of exposure parameters and ensuring imaging quality. Attached Figure Description

[0073] The above and other objects, features, and advantages of the present invention will become more apparent from the more detailed description of the embodiments of the invention in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same parts or steps.

[0074] Figure 1 A schematic block diagram of a DR imaging system according to an embodiment of the present invention is shown;

[0075] Figure 2 A schematic flowchart illustrating an exposure parameter setting method for a DR imaging system according to an embodiment of the present invention is shown.

[0076] Figure 3 This diagram illustrates the relationship between tube current and body thickness according to an embodiment of the present invention.

[0077] Figure 4 This diagram illustrates the relationship between the target human body emission dose and body thickness according to an embodiment of the present invention.

[0078] Figure 5 A schematic diagram showing a display interface according to an embodiment of the present invention is provided.

[0079] Figure 6 A schematic flowchart illustrating an exposure parameter setting method for a DR imaging system according to another embodiment of the present invention is shown.

[0080] Figure 7A schematic diagram showing a display interface according to another embodiment of the present invention;

[0081] Figure 8 A schematic flowchart illustrating an exposure parameter setting method for a DR imaging system according to another embodiment of the present invention is shown. Detailed Implementation

[0082] To make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of the present invention.

[0083] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0084] It should be understood that the invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0085] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0086] To fully understand this invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by this invention. Optional embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0087] Below, first refer to Figure 1 A DR imaging system 100 according to an embodiment of the present invention is described. See also Figure 1The DR imaging system 100 includes an X-ray generator 110, a flat panel detector 120, a display 130, a body thickness determination device 140, and a processor 150. The processor 150 is communicatively connected to the X-ray generator 110, the flat panel detector 120, the body thickness determination device 140, and the display 130. The X-ray generator 110 emits X-rays towards the patient to be imaged; the flat panel detector 120 receives the X-rays after they pass through the patient and generates an electrical signal; the body thickness determination device 140 acquires the body thickness value of the patient; the processor 150 processes the electrical signal to obtain a DR image, and also executes the exposure parameter setting method described below. The display 130 outputs a display interface under the control of the processor 150.

[0088] The DR imaging system 100 may include a column-type DR imaging system or a suspended DR imaging system. In a column-type DR imaging system, the X-ray generator 110 is mounted on a vertically movable column, and the flat panel detector 120 is fixed below the examination table or mounted on another column. In a suspended DR imaging system, the X-ray generator 110 is mounted on a robotic arm, which can rotate and move at multiple angles. Optionally, the DR imaging system may also include a movable DR imaging system.

[0089] Exemplarily, the X-ray generator 110 includes a x-ray tube for emitting X-rays; the flat panel detector 120 includes an upper X-ray conversion medium and a lower detection unit array. The X-ray conversion medium converts X-rays into electronic signals, generating positive and negative charges. These charges move along the electric field in the form of current under the action of a bias voltage, are collected by the detection unit array, and converted into electrical signals. The flat panel detector 120 includes, but is not limited to, amorphous silicon, amorphous selenium, CCD, etc. When using the DR imaging system 100 for image acquisition, the positions of the X-ray generator 110 and the flat panel detector 120 need to be fixed in a specified manner so that the X-rays emitted by the X-ray generator 110, after passing through the target tissue of the patient to be imaged, can irradiate the flat panel detector 120, thereby enabling the flat panel detector 120 to collect the X-rays after passing through the target tissue to obtain a DR image.

[0090] The DR imaging system of this embodiment of the invention also includes a body thickness determination device 140. Exemplarily, the body thickness determination device 140 may be a camera used to acquire patient images of the patient to be imaged, so as to measure the body thickness value of the patient. The body thickness determination device 140 may also include measuring devices such as a laser or millimeter-wave radar.

[0091] The display 130 is used to output the display interface. The display 130 can be a host computer display installed in the inspection room or a mid-level computer display installed in the shielded room. The mid-level computer display can be installed on a column or a rocker arm. This display is usually a touch screen display.

[0092] The processor 150 is used to process the electrical signal output by the flat panel detector 120 to obtain a DR image. The processor 150 is also used to execute the steps of the exposure parameter setting method of the embodiments of the present invention, as detailed below.

[0093] Below, refer to Figure 2 A method 200 for setting exposure parameters in a DR imaging system according to an embodiment of the present invention is described. For example... Figure 2 As shown, the exposure parameter setting method 200 of the DR imaging system may include the following steps:

[0094] In step S210, the patient image of the patient to be imaged is acquired by the camera;

[0095] In step S220, the body thickness value of the patient to be imaged is determined based on the patient image;

[0096] In step S230, a predetermined functional relationship between tube voltage and body thickness is obtained, and the tube voltage corresponding to the body thickness is determined according to the functional relationship.

[0097] In step S240, the predetermined target human body emission dose is obtained, and the target human body incident dose is determined based on the target human body emission dose, the body thickness value, and the tube voltage.

[0098] In step S250, the current-time product is determined based on the incident dose to the target human body;

[0099] In step S260, the X-ray generator is controlled to emit X-rays based on the current-time product and the tube voltage, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged and generate an electrical signal.

[0100] In step S270, a DR image is generated based on the electrical signal.

[0101] The exposure parameter setting method 200 of the DR imaging system of the present invention accurately measures the body thickness of the patient to be imaged by the camera, determines the tube voltage and current-time product based on the body thickness, and coordinates the ratio of tube voltage and current-time product while ensuring that the emitted dose of the target human body is obtained, thereby achieving better imaging quality.

[0102] For example, the camera can be mounted on a column or cantilever of the DR imaging system to ensure that its shooting range covers the area of ​​the patient to be imaged. The camera can be a depth camera, which can directly obtain the three-dimensional coordinates of various points on the patient's body surface, and then calculate the thickness information between the upper and lower surfaces of the body, i.e., the body thickness value. Specifically, the depth camera can include a binocular stereo camera, a structured light camera, or a ToF (Time of Flight) camera. A binocular stereo camera mainly uses a stereo matching algorithm to calculate the parallax of corresponding points in the left and right cameras, and then calculates the image depth using triangulation. A structured light camera has a built-in infrared laser or projector that projects a specific optical pattern onto the patient. The shape of the human body surface will distort the projected optical pattern. By capturing the distorted pattern with the camera and combining it with triangulation, the depth of various points on the human body surface can be calculated. A ToF camera calculates the depth of various points on the human body surface by measuring the time of flight of the light pulse between the sensor and the human body surface. Alternatively, the camera can be a conventional planar camera. In this case, the body thickness of the patient to be imaged can be determined by combining a reference object of known size, or by using at least two cameras and triangulation to determine the body thickness of the patient to be imaged, or by predicting the body thickness based on a deep learning algorithm, etc.

[0103] After obtaining the body thickness of the patient to be imaged, the tube voltage corresponding to the body thickness is first determined based on a pre-defined functional relationship between the tube voltage and the body thickness. Specifically, the X-ray generator of the DR imaging system mainly includes a high-voltage generator and an X-ray tube. The high-voltage generator provides a tube voltage to the X-ray tube, causing electrons generated by the filament in the X-ray tube to be accelerated under the action of the tube voltage and bombard the target material to generate X-rays. The electrons received by the target material form a tube current. Generally speaking, the tube voltage controls the energy and quality of the X-ray beam generated by the X-ray tube, which in turn determines the penetrating power of the X-rays. The strength of the penetrating power determines the amount of X-rays irradiating the flat panel detector, thereby determining the contrast of the DR image. The higher the body thickness, the stronger the required penetrating power, and the higher the corresponding tube voltage. Compared with determining the tube voltage based on body shape or by looking up a table to determine the tube voltage corresponding to the body thickness, the embodiment of the present invention determines the tube voltage based on a pre-defined functional relationship, which allows for continuous adjustment of the tube voltage and eliminates discretization errors. It is particularly suitable for scenarios where the body thickness varies slightly, and has higher accuracy.

[0104] For example, the functional relationship between tube voltage and body thickness is a linear functional relationship, meaning that tube voltage and body thickness are linearly proportional. Further, the functional relationship between tube voltage and body thickness can be expressed as:

[0105] V = 2T + C (Formula 1)

[0106] Where V represents the tube voltage, T represents the body thickness, and C is a constant. The relationship between tube voltage and body thickness can be found in [reference needed]. Figure 3 After determining the body thickness, the corresponding tube voltage can be determined based on the above functional relationship.

[0107] To determine the aforementioned linear functional relationship, specifically the constant C within it, recommended exposure parameters corresponding to at least two different body thickness values ​​can be obtained. These recommended exposure parameters include at least a recommended tube voltage. The linear functional relationship is then determined based on these at least two different body thickness values ​​and their corresponding recommended tube voltages. Obtaining the recommended exposure parameters for at least two different body thickness values ​​can include recommended exposure parameters for different body types, as well as typical body thickness values ​​for at least two different body types. For example, recommended exposure parameters for three body types—fat, medium, and thin—and typical body thickness values ​​for each type can be obtained for calculating the aforementioned linear functional relationship. This ensures that the tube voltage determined based on the functional relationship is substantially matched to the tube voltage recommended based on body type, improving imaging consistency.

[0108] After determining the tube voltage, the current-time product (mAs) is determined based on the tube voltage and body thickness. The current-time product is the product of the tube current (mA) and the exposure time (ms). The tube current controls the amount of X-rays, which determines the upper limit of the amount of X-rays that can reach the flat panel detector during DR imaging, thus determining the density of the DR image. The exposure time is the duration of the exposure process, which begins when the high-voltage generator produces high voltage to drive the X-ray tube and generate X-rays. During this process, the flat panel detector receives the X-rays and converts them into electrical signals. The exposure time determines the amount of X-ray dose. Patients with larger body thicknesses experience greater X-ray attenuation, thus requiring a higher current-time product to increase the X-ray dose received by the flat panel detector.

[0109] During parameter setting, the tube voltage is determined first, followed by the tube current based on the tube voltage and body thickness. This is because the tube voltage determines the X-ray penetration capability; a higher tube voltage results in higher average X-ray photon energy and stronger penetration of thick tissue. Increasing the body thickness primarily hinders X-ray penetration. Directly increasing the current-time product would still result in low-energy photons being completely absorbed by the thick tissue, leading to insufficient signal from the flat panel detector and a generally dark image. Therefore, increasing the tube voltage is prioritized to ensure X-rays can penetrate human tissue and reach the flat panel detector. After determining the tube voltage, the tube current still needs to be adjusted to ensure a consistent X-ray dose reaching the flat panel detector surface under different body types and positions. At this point, the current-time product is determined by the tube voltage, body thickness, and a pre-determined target human body emission dose. The target human body emission dose is the target dose of X-rays that penetrate the thickness of the patient being imaged, which is also the target dose of X-rays incident on the flat panel detector. While ensuring the emission dose to the target human body, if the tube voltage is high, the current-time product is reduced to avoid an excessively strong signal; if the tube voltage is low, the current-time product is increased to avoid an excessively weak signal. Compared with determining the current-time product solely based on the body thickness, a more ideal exposure parameter ratio can be obtained.

[0110] Specifically, after obtaining the predetermined target human body emission dose, the target human body incident dose, i.e. the target dose of X-rays incident on the patient to be imaged, is determined based on the target human body emission dose, body thickness, and tube voltage; then, the current-time product is determined based on the target human body incident dose.

[0111] For example, the emitted dose to the target human body is exponentially related to the body thickness, such as... Figure 4 As shown, the relationship between the target human body's emitted dose, the target human body's incident dose, and the body thickness is as follows:

[0112] I out =I in ·e -μT (Formula 2)

[0113] Among them, I in For the target human body incident dose, I out Let I be the target human body emission dose, T be the body thickness, μ be the linear attenuation coefficient related to tube voltage, and e be the natural logarithm base. out I can be obtained from μ and T. in .

[0114] At the same time, the incident dose to the target human body is directly proportional to the product of current and time, that is:

[0115] I in =α·mAs (Formula 3)

[0116] Based on Formula 3, the incident dose I of the target human body is calculated.in Then, based on the target human body incident dose I in Calculate the current-time product mAs. Since the same target human body emission dose is used when calculating the current-time product corresponding to different body thicknesses, the consistency of the imaging dose can be ensured.

[0117] For example, when calculating the emitted dose to a target human body, recommended exposure parameters corresponding to at least two different body thickness values ​​can be obtained. These recommended exposure parameters include at least a recommended tube voltage and a recommended current-time product. The emitted dose to the target human body is determined based on the at least two different body thickness values ​​and their corresponding recommended tube voltage and recommended current-time product. For example, the incident dose to the target human body can be calculated using at least two different body thickness values ​​and their corresponding recommended tube current, combined with Formula 3. Then, the emitted dose to the target human body can be calculated using the incident dose to the target human body, the recommended tube voltage, and the body thickness value, combined with Formula 2.

[0118] Similar to the method for determining the functional relationship between tube voltage and volume thickness, obtaining recommended exposure parameters corresponding to at least two different volume thickness values ​​may include obtaining recommended exposure parameters corresponding to at least two different body shapes, as well as typical volume thickness values ​​corresponding to at least two different body shapes. This ensures that the tube current determined based on the functional relationship is basically matched with the tube current recommended based on the body shape, thereby improving the consistency of imaging.

[0119] For example, after determining the current-time product, the tube current and exposure time can also be determined based on the current-time product, and the automatically determined exposure parameters can be displayed on the display interface. Users can further adjust the automatically determined tube voltage, current-time product, tube current, and exposure time.

[0120] In some embodiments, automatic parameter setting options and manual parameter setting options may also be provided; when a selection operation for the automatic parameter setting option is received, the tube voltage and tube current are determined according to the above method, that is, the tube voltage corresponding to the body thickness value is determined according to the functional relationship, and the current-time product is determined according to the incident dose of the target human body; when a selection operation for the manual parameter setting option is received, body type options corresponding to at least two different body types are provided, and the recommended exposure parameters corresponding to the target body type option are determined according to the selection operation for the target body type option among the body type options.

[0121] like Figure 5 As shown, automatic parameter setting options and / or manual parameter setting options can be displayed in the parameter setting mode selection area 510 of the display interface, where "Manual" refers to the manual parameter setting option and "Auto" refers to the automatic parameter setting option. At least two different body type options are displayed in the body type selection area 520, where different human figures represent the three different body type options: fat, medium, and thin. The user selects the target body type option (…). Figure 5After selecting "Medium body type," the exposure parameters corresponding to the medium body type will be automatically displayed in the exposure parameter display area 530, and the user can adjust the recommended exposure parameters.

[0122] When the user selects the automatic parameter setting option, the exposure parameters are automatically determined based on the method described above and displayed in the exposure parameter display area 530. The user can adjust the automatically determined exposure parameters.

[0123] In one embodiment, before determining the exposure parameters, the current grid usage (i.e., with or without a grid) can be determined. During the determination of the exposure parameters, a functional relationship corresponding to the grid usage can be selected. Specifically, recommended exposure parameters corresponding to the grid usage can be selected to determine the functional relationship between tube voltage and bulk thickness.

[0124] The X-ray grid, a component in a DR imaging system, is used to reduce scattered radiation and improve image quality. It is positioned between the patient and the flat panel detector and typically consists of alternating lead strips and a light-transmitting spacer. Scattered radiation refers to the scattered photons produced after an X-ray image passes through the human body. The grid absorbs these scattered photons, allowing only the effective X-rays traveling straight through to the flat panel detector. Because the lead strips of the grid absorb some of the effective X-rays, reducing the number of photons reaching the detector, the presence of a grid necessitates increasing the current-time product and appropriately raising the tube voltage. Selecting an appropriate functional relationship based on the grid's application can prevent insufficient X-ray dose with a grid or excessive X-ray dose without one.

[0125] In one embodiment, before determining the exposure parameters, the current imaging position can also be determined, and a functional relationship corresponding to the current imaging position can be selected. Specifically, recommended exposure parameters corresponding to the current imaging position can be selected to determine the functional relationship between tube voltage and body thickness, as well as the emission dose from the target human body.

[0126] like Figure 5 As shown, the imaging position can be selected in the imaging position selection area 540 of the display interface. The imaging position includes several aspects such as the X-ray incident direction, patient posture, and imaging site. The main factor affecting the exposure parameters is the imaging site. Different imaging sites have different tissue compositions and different absorption capacities for X-rays. Therefore, it is necessary to adjust the exposure parameters to ensure image quality. For example, for high-density tissues such as limbs, a higher tube voltage is recommended to increase penetration because they absorb a large amount of X-rays, but the recommended current-time product may be lower to avoid overexposure. For low-density tissues such as lungs, a lower recommended tube voltage is needed to improve contrast, but a higher recommended current-time product is needed to ensure the signal-to-noise ratio.

[0127] After determining the exposure parameters, imaging can be performed based on these parameters according to user operation. Specifically, the X-ray generator is controlled to emit X-rays; a flat panel detector is controlled to receive the X-rays after they pass through the patient to be imaged, and an electrical signal is generated; the electrical signal is processed to obtain a DR image. The X-rays emitted by the X-ray generator are attenuated to varying degrees after passing through the human body and are received by the flat panel detector. The upper layer of the flat panel detector is an X-ray conversion medium with photoconductivity, which converts X-rays into electronic signals, generating positive and negative charges. These charges move along the electric field in the form of current under the action of a bias voltage and are collected by the detector's array of detection units, with each detection unit corresponding to one pixel in the DR image. The DR image is obtained by amplifying and converting the electrical signal from analog to digital.

[0128] Based on the above description, the exposure parameter setting method 200 of the DR imaging system according to the embodiment of the present invention automatically sets exposure parameters such as tube voltage and current-time product according to the volume thickness value and a predetermined functional relationship, which can improve the accuracy of exposure parameters.

[0129] Below, refer to Figure 6 A method 600 for setting exposure parameters of a DR imaging system according to an embodiment of the present invention is described. For example... Figure 6 As shown, the exposure parameter setting method 600 of the DR imaging system may include the following steps:

[0130] In step S610, the body thickness value of the patient to be imaged is determined based on the measurement results of the body thickness measuring device;

[0131] In step S620, the current usage status of the filter grid is determined, including whether there is a filter grid or no filter grid.

[0132] In step S630, a body thickness-exposure parameter model corresponding to the use of the filter grid is obtained. Different body thickness-exposure parameter models correspond to the same target human body emission dose.

[0133] In step S640, the body thickness value is input into the body thickness-exposure parameter model to obtain the exposure parameters corresponding to the body thickness value;

[0134] In step S650, the X-ray generator is controlled to emit X-rays according to the exposure parameters, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged and generate an electrical signal. The X-rays received by the flat panel detector have the target human body emission dose.

[0135] In step S660, a DR image is generated based on the electrical signal.

[0136] In the exposure parameter setting method 600 of this embodiment of the invention, the thickness measuring device can be the camera described above, or it can be a laser, millimeter-wave radar, or other measuring device. Optionally, the thickness determining device can also be a display, where the user can manually input the thickness value.

[0137] For example, determining the use of a filter grid may include: displaying filter grid usage options on a display interface, including a filter grid option and a no-filter grid option; when a selection operation for the filter grid option is received, selecting the volume thickness-exposure parameter model corresponding to the filter grid option; when a selection operation for the no-filter grid option is received, selecting the volume thickness-exposure parameter model corresponding to the filter grid option. Optionally, the use of a filter grid may also be detected automatically.

[0138] The volume thickness-exposure parameter model corresponding to the use of the filter grid can include the functional relationship described above. Alternatively, the volume thickness-exposure parameter model corresponding to the use of the filter grid can be other functional relationships or machine learning models, etc. The exposure parameters obtained based on the volume thickness-exposure parameter model include at least the tube voltage; the larger the volume thickness value, the larger the tube voltage, and the two are positively correlated. The exposure parameters obtained based on the volume thickness-exposure parameter model may also include at least one of tube current, exposure time, and current-time product.

[0139] Different body thickness-exposure parameter models correspond to the same target human body emission dose. That is, different body thickness-exposure parameter models are established based on the same target human body emission dose, and the exposure parameters obtained using different body thickness-exposure parameter models can all yield the same target human body emission dose. For example, a grid corresponds to the first body thickness-exposure parameter model, based on which the first exposure parameter can be obtained. When using the first exposure parameter for exposure, the target human body emission dose can be obtained. A gridless model corresponds to the second body thickness-exposure parameter model, based on which the second exposure parameter can be obtained. When using the second exposure parameter for exposure, the same target human body emission dose can also be obtained.

[0140] For example, the current imaging position can also be determined, and the thickness-exposure parameter model corresponding to the current imaging position can be selected, that is, the thickness-exposure parameter model can be selected by comprehensively considering the use of the grid and the imaging position.

[0141] For example, an automatic parameter setting option and a manual parameter setting option can be provided on the display interface; when a selection operation for the automatic parameter setting option is received, the exposure parameter is determined according to the body thickness-exposure parameter model; when a selection operation for the manual parameter setting option is received, body type options corresponding to at least two different body types are provided, and the exposure parameter corresponding to the target body type option is determined according to the selection operation for the target body type option among the body type options.

[0142] For example, the automatic exposure parameter setting method based on the body thickness-exposure parameter model can also be combined with automatic exposure based on the ionization chamber. Specifically, the exposure parameters corresponding to the body thickness value include at least the tube voltage. After automatically setting the tube voltage based on the body thickness value, exposure begins, and the exposure time is determined based on the ionization chamber during the process of controlling the X-ray generator to emit X-rays and controlling the flat panel detector to receive the X-rays after passing through the patient to be imaged.

[0143] Specifically, an ionization chamber is positioned between a flat panel detector and the patient to be imaged, used to detect the X-ray dose reaching the detector. Exemplarily, the ionization chamber mainly consists of a collecting electrode and a high-voltage electrode, with the space between them filled with a gas such as argon or helium. When the ionization chamber is irradiated by X-rays, the X-rays interact with molecules in the gas, producing ion pairs consisting of an electron and a positive ion. When a DC polarization voltage is applied to the collecting electrode and the high-voltage electrode, creating an electric field, the electron and positive ion are attracted to the positive and negative electrodes respectively and collected, forming an output electrical signal in the external circuit. This electrical signal is proportional to the number of ion pairs, and therefore proportional to the X-ray intensity. When the voltage signal output by the ionization chamber reaches a reference voltage, it triggers the termination of exposure, i.e., automatically controlling the exposure time based on the ionization chamber.

[0144] For example, see Figure 7 The display interface shows the ionization chamber exposure option 710. When a selection operation for the ionization chamber option 710 is received, the tube voltage and tube current are first automatically determined based on the thickness-exposure parameter model and displayed in the exposure parameter display area 720. Then, exposure begins, and the exposure cutoff time is determined based on the ionization chamber, i.e., the exposure time is determined. Then, the current-time product is obtained based on the exposure time and tube current. The plate attitude display area 730 displays three plate attitudes: free-state plate, plate on a column, and plate under a bed. Usually, the ionization chamber exposure option 710 can be selected in the plate on a column and plate under a bed attitudes, but it can also be selected in all plate attitudes.

[0145] The exposure parameter setting method 600 of the DR imaging system according to the present invention automatically sets the exposure parameters according to the volume thickness value and selects the corresponding volume thickness-exposure parameter model according to the use of the filter grid, which can improve the accuracy of the exposure parameters.

[0146] Below, refer to Figure 8 A method 800 for setting exposure parameters of a DR imaging system according to an embodiment of the present invention is described. For example... Figure 8 As shown, the exposure parameter setting method 800 of the DR imaging system may include the following steps:

[0147] In step S810, the body position options and automatic parameter setting options are displayed on the display interface;

[0148] In step S820, a selection operation for the position option is received to determine the imaging position of the patient to be imaged;

[0149] In step S830, when a selection operation for the automatic parameter setting option is received, the exposure parameters corresponding to the imaging position are automatically determined based on the obtained body thickness value of the patient to be imaged, and the exposure parameters corresponding to the imaging position are displayed on the display interface.

[0150] In step S840, the X-ray generator is controlled to emit X-rays based on the determined exposure parameters, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged, and generate an electrical signal.

[0151] In step S850, a DR image is generated based on the electrical signal.

[0152] Furthermore, manual parameter setting options can be displayed on the screen. When a selection operation for the manual parameter setting option is received, at least two different body type options can be provided. The exposure parameters corresponding to the imaging position are determined based on the selection operation of the target body type option, and displayed on the screen. The body type options can include three different body types: fat, medium, and thin. Each body type is configured with multiple sets of exposure parameters corresponding to different imaging positions. Both automatic and manual exposure parameter settings can be modified by the user. When a modification operation is received for the exposure parameters displayed on the screen, the displayed exposure parameters can be modified.

[0153] Re-reference Figure 5 Automatic and manual parameter setting options can be displayed in the parameter setting mode selection area 510 of the display interface, where "Manual" refers to the manual parameter setting option and "Auto" refers to the automatic parameter setting option. Position options can be displayed in the imaging position selection area 540 of the display interface. Users can select a position first and then choose automatic or manual parameter settings, or they can select the parameter setting method first and then select the position. Figure 5 The current imaging position shown is the posteroanterior view of the chest (standing).

[0154] When the user selects the automatic parameter setting option, the exposure parameters corresponding to the chest anterior-posterior position (standing position) can be automatically determined based on the method described above and displayed in the exposure parameter display area 530. The user can adjust the automatically determined exposure parameters. The exposure parameters include at least one of tube voltage, tube current, exposure time, and current-time product.

[0155] When a selection operation for manual parameter settings is received, at least two different body type options can be displayed in the body type selection area 520. Specifically, different human figures can be used to represent the three different body type options: fat, medium, and thin. The user selects the target body type option (...). Figure 5 After selecting a medium-sized body type, the exposure parameters corresponding to the medium-sized body type and the chest rear-anterior position (standing position) will be automatically displayed in the exposure parameter display area 530. Users can adjust the recommended exposure parameters.

[0156] In one embodiment, a grid usage option can also be displayed on the interface, including a grid option and a no-grid option; a selection operation for the grid option or the no-grid option is received; when a selection operation for the grid option is received, the exposure parameters set automatically or manually are the exposure parameters corresponding to the grid option; when a selection operation for the no-grid option is received, the exposure parameters set automatically or manually are the exposure parameters corresponding to the no-grid option.

[0157] The exposure parameter setting method 800 of the DR imaging system according to an embodiment of the present invention allows users to freely choose to set exposure parameters automatically or manually, and to set the imaging position. When the user selects to set exposure parameters automatically, the exposure parameters corresponding to the current imaging position are automatically determined based on the body thickness value of the patient to be imaged. When the user selects to set exposure parameters manually, the exposure parameters corresponding to the imaging position are determined according to the selection operation of the target body shape option, thereby improving the flexibility and accuracy of exposure parameter setting.

[0158] Furthermore, according to embodiments of the present invention, a computer storage medium is also provided, on which program instructions are stored, which, when executed by a computer or processor, are used to perform corresponding steps of the methods of any embodiment of the present invention. In some embodiments, the computer storage medium is a non-volatile computer-readable storage medium, which may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required for at least one function; the data storage area may store data created during the execution of the program instructions, etc. Furthermore, the non-volatile computer-readable storage medium may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the non-volatile computer-readable storage medium may optionally include memory remotely disposed relative to the processor.

[0159] For example, the computer storage medium may include a hard drive of a personal computer, a storage component of a tablet computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disc read-only memory (CD-ROM), a USB memory, a memory card of a smartphone, or any combination of the above storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0160] Furthermore, according to embodiments of the present invention, a computer program is also provided, which can be stored on a cloud or local storage medium. When this computer program is run by a computer or processor, it is used to perform the corresponding steps of the exposure parameter setting method for the DR imaging system according to embodiments of the present invention.

[0161] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of the invention. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as claimed in the appended claims.

[0162] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0163] In the several embodiments provided by this invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0164] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0165] Similarly, it should be understood that, in order to streamline the invention and aid in understanding one or more of the various aspects of the invention, features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the invention. However, this approach should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its inventive point lies in solving the corresponding technical problem with fewer features than all of those in a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0166] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus so disclosed can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0167] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0168] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some modules in the article analysis device according to embodiments of the present invention. The present invention can also be implemented as an apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0169] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0170] The above description is merely a specific embodiment of the present invention or an explanation of that embodiment. The scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for setting exposure parameters in a DR imaging system, characterized in that, The DR imaging system includes an X-ray generator, a flat panel detector, and a camera; the method includes: Acquire the patient image of the patient to be imaged captured by the camera; The body thickness value of the patient to be imaged is determined based on the patient image; Obtain a predetermined functional relationship between tube voltage and body thickness, and determine the tube voltage corresponding to the body thickness based on the functional relationship; Obtain a predetermined target human body emission dose, and determine the target human body incident dose based on the target human body emission dose, the body thickness value, and the tube voltage; The current-time product is determined based on the incident dose to the target human body. The X-ray generator is controlled to emit X-rays based on the current-time product and the tube voltage, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged and generate an electrical signal. A DR image is generated based on the electrical signal.

2. The method as described in claim 1, characterized in that, The tube voltage is linearly proportional to the body thickness.

3. The method as described in claim 1 or 2, characterized in that, Determining the functional relationship includes: Obtain recommended exposure parameters corresponding to at least two different body thickness values, wherein the recommended exposure parameters include at least a recommended tube voltage; The functional relationship is determined based on the at least two different body thickness values ​​and their corresponding recommended tube voltages.

4. The method as described in claim 1, characterized in that, The radiation dose emitted from the target human body is exponentially related to the body thickness.

5. The method as described in claim 1 or 4, characterized in that, The incident dose to the target human body is directly proportional to the product of the current and time.

6. The method as described in claim 1, characterized in that, The process of obtaining a predetermined target human body emission dose includes: Obtain recommended exposure parameters corresponding to at least two different body thickness values, wherein the recommended exposure parameters include at least a recommended tube voltage and a recommended current-time product; The target human body emission dose is determined based on the at least two different body thickness values ​​and their corresponding recommended tube voltage and recommended current-time product.

7. The method as described in claim 3 or 6, characterized in that, The process of obtaining recommended exposure parameters corresponding to at least two different body thickness values ​​includes: Obtain recommended exposure parameters for at least two different body types, as well as typical body thickness values ​​for the at least two different body types.

8. The method as described in claim 7, characterized in that, The method further includes: Provides automatic parameter setting options and / or manual parameter setting options; When a selection operation for the automatic parameter setting option is received, the tube voltage corresponding to the body thickness value is determined according to the functional relationship, and the current-time product is determined according to the incident dose to the target human body. When a selection operation for the manual parameter setting option is received, body type options corresponding to the at least two different body types are provided, and a recommended exposure parameter corresponding to the target body type option is determined based on the selection operation for the target body type option among the body type options.

9. The method as described in claim 3 or 6, characterized in that, Also includes: Determine the current usage status of the filter grid, which includes whether the filter grid is present or absent; Select the recommended exposure parameters corresponding to the usage of the filter grid.

10. The method as described in claim 3 or 6, characterized in that, The method further includes: Determine the current imaging position and select the recommended exposure parameters corresponding to the current imaging position.

11. A method for setting exposure parameters in a DR imaging system, characterized in that, The DR imaging system includes an X-ray generator, a flat panel detector, and a body thickness determination device; the method includes: The body thickness value of the patient to be imaged is determined based on the body thickness determination device. Determine the current usage status of the filter grid, which includes whether the filter grid is present or absent; Obtain the body thickness-exposure parameter model corresponding to the usage of the filter grid; different body thickness-exposure parameter models correspond to the same target human body emission dose. Input the volume thickness value into the volume thickness-exposure parameter model to obtain the exposure parameters corresponding to the volume thickness value; The X-ray generator is controlled to emit X-rays according to the exposure parameters, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged and generate an electrical signal. The X-rays received by the flat panel detector have the target human body emission dose. A DR image is generated based on the electrical signal.

12. The method as described in claim 11, characterized in that, The exposure parameters include at least one of the following: tube voltage, tube current, exposure time, and current-time product.

13. The method as described in claim 11, characterized in that, The method further includes: Provides automatic parameter setting options and / or manual parameter setting options; When a selection operation for the automatic parameter setting option is received, the exposure parameters are determined according to the body thickness-exposure parameter model; When a selection operation for the manual parameter setting option is received, body type options corresponding to at least two different body types are provided, and the exposure parameters corresponding to the target body type option are determined based on the selection operation for the target body type option among the body type options.

14. The method as described in claim 11, characterized in that, The method further includes: Determine the current imaging position and select the thickness-exposure parameter model corresponding to the current imaging position.

15. The method as described in claim 11, characterized in that, The exposure parameters corresponding to the volume thickness value include at least the tube voltage, and the method further includes: Exposure time is determined based on the ionization chamber during the process of controlling the X-ray generator to emit X-rays and controlling the flat panel detector to receive X-rays after they have passed through the patient to be imaged.

16. A method for setting exposure parameters in a DR imaging system, characterized in that, The DR imaging system includes an X-ray generator, a flat panel detector, a camera, and a display device. The camera is used to acquire patient images of the patient to be imaged, so as to determine the body thickness value of the patient to be imaged based on the patient images. The display device is used to output a display interface. The method includes: The display interface shows body position options and automatic parameter setting options; Receive a selection operation for the position option to determine the imaging position of the patient to be imaged; When a selection operation for the automatic parameter setting option is received, the exposure parameters corresponding to the imaging position are automatically determined based on the obtained body thickness value of the patient to be imaged, and the exposure parameters corresponding to the imaging position are displayed on the display interface. Based on determined exposure parameters, the X-ray generator is controlled to emit X-rays, and the flat panel detector is controlled to receive the X-rays after passing through the patient to be imaged, and to generate an electrical signal. A DR image is generated based on the electrical signal.

17. The method as described in claim 16, characterized in that, The method further includes: The display interface shows the manual parameter setting option; When a selection operation for the manual parameter setting option is received, at least two body type options corresponding to different body types are provided, and the exposure parameters corresponding to the imaging position are determined according to the selection operation of the target body type option among the body type options, and the exposure parameters corresponding to the imaging position are displayed on the display interface.

18. The method as described in claim 17, characterized in that, The method further includes: The exposure parameters are automatically determined based on the user's modification operation or are determined based on the selection operation of the target body shape option in the body shape options.

19. The method as described in claim 16, characterized in that, The exposure parameters include at least one of the following: tube voltage, tube current, exposure time, and current-time product.

20. The method as described in claim 16, characterized in that, The method further includes: The display interface shows options for using the grid, including an option with a grid and an option without a grid. Receive a selection operation for the option with a filter grid or the option without a filter grid; When a selection operation for the option with a grid is received, the exposure parameter is the exposure parameter corresponding to the option with a grid; when a selection operation for the option without a grid is received, the exposure parameter is the exposure parameter corresponding to the option without a grid.

21. A DR imaging system, characterized in that, The DR imaging system includes: an X-ray generator, a flat panel detector, a display, a body thickness determination device, and a processor, wherein: The X-ray generator is used to emit X-rays toward the patient to be imaged; The flat panel detector is used to receive X-rays after they pass through the patient to be imaged and to generate electrical signals; The body thickness determining device is used to determine the body thickness value of the patient to be imaged. The processor is used to process the electrical signal to obtain a DR image, and the processor is also used to perform the method according to any one of claims 1-20; The display is used to output a display interface under the control of the processor.

Images