Method for determining tube electrical parameters, host and medical imaging system

Abstract

The application provides a method for determining tube electrical parameters, a host computer and a medical imaging system. The method for determining tube electrical parameters comprises the following steps: acquiring projection data of an imaging device for scanning a target object at a first scanning angle; acquiring target noise data of the target object; determining current noise data of the projection data according to the projection data; and determining tube electrical parameters of the imaging device for scanning the target object at a second scanning angle according to the target noise data and the current noise data. The method provided by the application can select appropriate tube electrical parameters directly from the noise data estimated from the projection data without establishing a knowledge base in advance, improve the quality of the reconstructed image, reduce the radiation dose received by the patient, and play an important role in low-dose imaging of the medical imaging device.

Description

Technical Field

[0001] This application mainly relates to the field of medical imaging technology, specifically to a method for determining the electrical parameters of an X-ray tube, a host computer, and a medical imaging system. Background Technology

[0002] Medical imaging, containing a wealth of information about the human body, can visually represent the internal structure, morphology, and function of organs. Therefore, medical imaging has become one of the most active fields in medical research and clinical diagnosis. Medical imaging technology, as a research direction within the field of medical imaging, is a product of the interpenetration of various high technologies, including physics, electronics, computer technology, engineering data, materials science, and precision machining.

[0003] Medical imaging technologies can be categorized into basic types based on their information carriers, such as X-ray imaging, magnetic resonance imaging, radionuclide imaging, and ultrasound imaging. In X-ray imaging systems, fixed X-ray tube voltage and current are typically set for specific patient areas (e.g., head, chest, abdomen) to achieve scanning and reconstruction of those areas.

[0004] However, different patients have different body shapes, and the angle and direction attenuation of different patient parts are also different. Therefore, a fixed tube voltage and tube current may easily lead to excessive radiation dose to the patient, which may harm the body, or lead to insufficient radiation dose to the patient, which may prevent accurate imaging of the patient part. Summary of the Invention

[0005] This application provides a method, a host computer, and a medical imaging system for determining the electrical parameters of an X-ray tube, which improves the quality of reconstructed images while reducing the radiation dose received by the patient.

[0006] In a first aspect, this application provides a method for determining the electrical parameters of an X-ray tube, the method comprising:

[0007] Acquire projection data of the target object scanned by the imaging device at the first scanning angle;

[0008] Obtain the preset target noise data of the target object;

[0009] Based on the projection data, determine the current noise data of the projection data;

[0010] Based on the target noise data and the current noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined.

[0011] In some embodiments of this application, the imaging device is a CBCT device.

[0012] In some embodiments of this application, acquiring the projection data of the target object scanned by the imaging device at a first scanning angle includes:

[0013] Acquire the initial projection data of the target object scanned by the imaging device at the first scanning angle;

[0014] The initial projection data is filtered to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0015] In some embodiments of this application, the step of filtering the initial projection data to obtain the projection data of the target object scanned by the imaging device at the first scanning angle includes:

[0016] Based on preset sliding window parameters, the initial projection data is filtered using a step-by-step sliding window method to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0017] In some embodiments of this application, determining the current noise data of the projection data based on the projection data includes:

[0018] Perform spatial transformation on the projection data to determine the noise component of the projection data;

[0019] Based on the noise components, noise estimation is performed on the projection data to obtain the current noise data of the projection data.

[0020] In some embodiments of this application, determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes:

[0021] Based on the target noise data, the current noise data, and the preset correspondence between noise data and X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

[0022] Based on the target X-ray tube electrical parameters, the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle are determined.

[0023] In some embodiments of this application, before determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and a preset correspondence between noise data and X-ray tube electrical parameters, the method further includes:

[0024] Establish a pre-defined correspondence between noise data and X-ray tube electrical parameters.

[0025] In some embodiments of this application, the preset correspondence between noise data and X-ray tube electrical parameters is a correspondence between noise data, equivalent size, and X-ray tube electrical parameters;

[0026] The establishment of the preset correspondence between noise data and X-ray tube electrical parameters includes:

[0027] Noise data were obtained under different equivalent dimensions and different X-ray tube electrical parameters, and the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data was obtained.

[0028] In some embodiments of this application, obtaining noise data under different equivalent dimensions and different X-ray tube electrical parameters, and obtaining the correspondence between equivalent dimensions, X-ray tube electrical parameters, and noise data, includes:

[0029] Obtain noise data under different equivalent sizes and different X-ray tube electrical parameters;

[0030] The noise data under different equivalent dimensions and different X-ray tube electrical parameters are subjected to data augmentation processing to obtain the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data.

[0031] In some embodiments of this application, determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and a preset correspondence between noise data and X-ray tube electrical parameters includes:

[0032] Obtain the current X-ray tube electrical parameters at the first scanning angle;

[0033] Based on the current noise data, the current X-ray tube electrical parameters, and the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, the equivalent size of the target object is determined.

[0034] Based on the equivalent size of the target object and the target noise data, the electrical parameters of the target X-ray tube used to scan the target object are determined.

[0035] In some embodiments of this application, determining the target X-ray tube electrical parameters for scanning the target object based on the equivalent size of the target object and the target noise data includes:

[0036] Based on the equivalent size of the target object and the target noise data, as well as the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, a set of X-ray tube electrical parameters matching the target noise data and the equivalent size of the target object is determined;

[0037] From the set of X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

[0038] In some embodiments of this application, determining the target X-ray tube electrical parameters for scanning the target object from the set of X-ray tube electrical parameters includes:

[0039] Determine the dose value corresponding to each X-ray tube electrical parameter in the X-ray tube electrical parameter set;

[0040] The X-ray tube electrical parameter with the smallest dose value in the set of X-ray tube electrical parameters is selected as the target X-ray tube electrical parameter for scanning the target object.

[0041] In some embodiments of this application, the X-ray tube electrical parameters include X-ray tube current and X-ray tube voltage.

[0042] In some embodiments of this application, the X-ray tube current is adjustable while the X-ray tube voltage remains constant. The step of determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes:

[0043] The current X-ray tube current of the imaging device scanning the target object at the first scanning angle is obtained;

[0044] Based on the target noise data, the current noise data, and the current X-ray tube current, the imaging device adjusts the X-ray tube current for scanning the target object at a second scanning angle.

[0045] In some embodiments of this application, determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes:

[0046] When it is determined that the current noise data exceeds the preset noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined based on the target noise data and the current noise data.

[0047] Secondly, this application also provides a method for determining the electrical parameters of an X-ray tube, the method comprising:

[0048] Obtain the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube;

[0049] Based on the correspondence, the X-ray tube electrical parameters of the first imaging device are determined as the corresponding X-ray tube electrical parameters at the corresponding scanning angle.

[0050] In some embodiments of this application, before obtaining the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube, the method further includes:

[0051] Establish a preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube.

[0052] In some embodiments of this application, establishing a preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube includes:

[0053] Acquire projection data of the target object scanned by the second imaging device at different scanning angles;

[0054] Obtain the preset target noise data of the target object;

[0055] Based on the projection data of the target object scanned at different scanning angles, noise data corresponding to the projection data at different scanning angles is determined.

[0056] Based on the noise data corresponding to the projection data at different scanning angles and the target noise data, the X-ray tube electrical parameters at different scanning angles are determined.

[0057] Based on the X-ray tube electrical parameters at different scanning angles, a correspondence between the target object's different scanning angles and the X-ray tube electrical parameters is established.

[0058] In some embodiments of this application, the second imaging device is a CT device.

[0059] Thirdly, this application provides a device for adjusting the electrical parameters of an X-ray tube, the device comprising:

[0060] The first acquisition unit is used to acquire projection data of the target object scanned by the imaging device at the first scanning angle;

[0061] The second acquisition unit is used to acquire preset target noise data of the target object;

[0062] A determining unit is configured to determine the current noise data of the projection data based on the projection data;

[0063] The adjustment unit is used to determine the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle, based on the target noise data and the current noise data.

[0064] In some embodiments of this application, the first acquisition unit is specifically used for:

[0065] Acquire the initial projection data of the target object scanned by the imaging device at the first scanning angle;

[0066] The initial projection data is filtered to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0067] In some embodiments of this application, the first acquisition unit is specifically used for:

[0068] Based on preset sliding window parameters, the initial projection data is filtered using a step-by-step sliding window method to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0069] In some embodiments of this application, the determining unit is specifically used for:

[0070] Perform spatial transformation on the projection data to determine the noise component of the projection data;

[0071] Based on the noise components, noise estimation is performed on the projection data to obtain the current noise data of the projection data.

[0072] In some embodiments of this application, the adjustment unit is specifically used for:

[0073] Based on the target noise data, the current noise data, and the preset correspondence between noise data and X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

[0074] Based on the target X-ray tube electrical parameters, the imaging device is adjusted to scan the target object at a second scanning angle using the X-ray tube electrical parameters.

[0075] In some embodiments of this application, the adjustment unit is specifically used for:

[0076] Obtain the current X-ray tube electrical parameters at the first scanning angle;

[0077] Based on the current noise data, the current X-ray tube electrical parameters, and the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, the equivalent size of the target object is determined.

[0078] Based on the equivalent size of the target object and the target noise data, the electrical parameters of the target X-ray tube used to scan the target object are determined.

[0079] In some embodiments of this application, the adjustment unit is specifically used for:

[0080] Based on the equivalent size of the target object and the target noise data, as well as the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, a set of X-ray tube electrical parameters matching the target noise data and the equivalent size of the target object is determined;

[0081] From the set of X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

[0082] In some embodiments of this application, the adjustment unit is specifically used for:

[0083] Determine the dose value corresponding to each X-ray tube electrical parameter in the X-ray tube electrical parameter set;

[0084] The X-ray tube electrical parameter with the smallest dose value in the set of X-ray tube electrical parameters is selected as the target X-ray tube electrical parameter for scanning the target object.

[0085] In some embodiments of this application, the X-ray tube current is adjustable while the X-ray tube voltage remains constant, and the adjustment unit is specifically used for:

[0086] The current X-ray tube current of the imaging device scanning the target object at the first scanning angle is obtained;

[0087] Based on the target noise data, the current noise data, and the current X-ray tube current, the imaging device adjusts the X-ray tube current for scanning the target object at a second scanning angle.

[0088] In some embodiments of this application, the adjustment unit is specifically used for:

[0089] When it is determined that the current noise data exceeds the preset noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined based on the target noise data and the current noise data.

[0090] Fourthly, this application provides an apparatus for determining the electrical parameters of an X-ray tube, the apparatus comprising:

[0091] The acquisition module is used to acquire the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube;

[0092] The determining module is used to determine the X-ray tube electrical parameters of the first imaging device as the corresponding X-ray tube electrical parameters at the corresponding scanning angle based on the correspondence relationship.

[0093] In some embodiments of this application, the apparatus further includes a setup module, the setup module being used for:

[0094] Before obtaining the preset correspondence between different scanning angles of the target object and the X-ray tube electrical parameters, a preset correspondence between different scanning angles of the target object and the X-ray tube electrical parameters is established.

[0095] In some embodiments of this application, the establishment module is specifically used for:

[0096] Acquire projection data of the target object scanned by the second imaging device at different scanning angles;

[0097] Obtain the preset target noise data of the target object;

[0098] Based on the projection data of the target object scanned at different scanning angles, noise data corresponding to the projection data at different scanning angles is determined.

[0099] Based on the noise data corresponding to the projection data at different scanning angles and the target noise data, the X-ray tube electrical parameters at different scanning angles are determined.

[0100] Based on the X-ray tube electrical parameters at different scanning angles, a correspondence between the target object's different scanning angles and the X-ray tube electrical parameters is established.

[0101] In some embodiments of this application, the second imaging device is a CT device.

[0102] Fourthly, this application provides a host computer, the host computer comprising:

[0103] One or more processors;

[0104] Memory; and

[0105] One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the method for determining the electrical parameters of the X-ray tube as described in any one of the first aspects, or the method for determining the electrical parameters of the X-ray tube as described in the second aspect.

[0106] Fifthly, this application provides a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in the method for determining the electrical parameters of an X-ray tube as described in any one of the first aspects, or the steps in the method for determining the electrical parameters of an X-ray tube as described in the second aspect.

[0107] In a sixth aspect, this application provides a medical imaging system, including a host and an imaging device, wherein the host and the imaging device are communicatively connected, and the host is the host described in the fourth aspect.

[0108] This application provides a method, host device, and medical imaging system for determining X-ray tube electrical parameters. The method involves acquiring projection data of a target object scanned by an imaging device at a first scanning angle, obtaining preset target noise data for the target object, determining current noise data based on the projection data, and then determining the X-ray tube electrical parameters for scanning the target object at a second scanning angle based on the target noise data and the current noise data. By directly selecting appropriate X-ray tube electrical parameters from the noise data estimated from the projection data without prior knowledge base establishment, the method improves the quality of reconstructed images while reducing the radiation dose received by the patient, playing a crucial role in low-dose imaging in medical imaging equipment. Attached Figure Description

[0109] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0110] Figure 1 This is a schematic diagram of a medical imaging system provided in an embodiment of this application;

[0111] Figure 2 This is a schematic flowchart of an embodiment of the method for determining the electrical parameters of an X-ray tube provided in this application.

[0112] Figure 3 This is a schematic flowchart of an embodiment of another method for determining the electrical parameters of a X-ray tube provided in this application;

[0113] Figure 4 This is a schematic diagram of an embodiment of the device for adjusting the electrical parameters of the X-ray tube provided in this application.

[0114] Figure 5 This is a schematic diagram of an embodiment of a device for adjusting the electrical parameters of an X-ray tube provided in this application.

[0115] Figure 6 This is a schematic diagram of an embodiment of the host provided in this application. Detailed Implementation

[0116] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0117] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0118] To enable any person skilled in the art to implement and use this application, the following description is provided. In this description, details are set forth for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0119] This application provides a method for determining the electrical parameters of an X-ray tube, a host computer, and a medical imaging system, which will be described in detail below.

[0120] Please see Figure 1 , Figure 1 This is a schematic diagram of a medical imaging system provided in an embodiment of this application. The medical imaging system may include an imaging device 100 and a host computer 200. The imaging device 100 and the host computer 200 are communicatively connected, and the imaging device 100 can transmit data to the host computer 200, such as... Figure 1 The imaging device 100 can acquire medical images of the human body and output them to the host 200, which integrates a device for adjusting the electrical parameters of the X-ray tube.

[0121] The medical imaging system can be either an imaging system or a radiotherapy system. If the medical imaging system is a radiotherapy system, the imaging equipment and the radiotherapy head are integrated on a rotating carrier, such as a rotating gantry.

[0122] In this embodiment, the imaging device 100 may be a cone-beam computed tomography (CBCT), or include a single flat panel and detector, or include orthogonally arranged flat panels and detectors, or it may be a computed tomography (CT) or other imaging device, etc., and the specifics are not limited here.

[0123] In this embodiment, the host 200 can be an independent server, a server network, or a server cluster. For example, the host 200 described in this embodiment includes, but is not limited to, a computer, a network host, a single network server, a set of multiple network servers, or a cloud server composed of multiple servers. The cloud server is composed of a large number of computers or network servers based on cloud computing.

[0124] In this embodiment, the host 200 can be a general-purpose computer device or a special-purpose computer device. In specific implementations, the host 200 can be a desktop computer, a portable computer, a network server, a PDA (Personal Digital Assistant), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, etc. This embodiment does not limit the type of host 200.

[0125] In the embodiments of this application, the imaging device 100 and the host 200 can communicate through any communication method, including but not limited to mobile communication based on the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE), and Worldwide Interoperability for Microwave Access (WiMAX), or computer network communication based on the TCP / IP Protocol Suite (TCP / IP) and User Datagram Protocol (UDP).

[0126] Those skilled in the art will understand that Figure 1 The application environment shown is merely one application scenario of the solution in this application and does not constitute a limitation on the application scenario of the solution in this application. Other application environments may include those that are more specific to this application. Figure 1 The number of computer devices shown is more or less, for example Figure 1 Only one computer device is shown in the diagram. It is understood that the medical imaging system may also include one or more other computer devices capable of processing data, which are not specifically limited here.

[0127] In addition, such as Figure 1 As shown, the medical imaging system may also include a memory 300 for storing data, such as different X-ray tube electrical parameter data at multiple scanning angles or projection data of the target object, etc.

[0128] It should be noted that, Figure 1 The schematic diagram of the medical imaging system shown is merely an example. The medical imaging system and scenario described in this application are intended to more clearly illustrate the technical solutions of this application and do not constitute a limitation on the technical solutions provided in this application. As those skilled in the art will know, with the evolution of medical imaging systems and the emergence of new business scenarios, the technical solutions provided in this application are also applicable to similar technical problems.

[0129] First, this application provides a method for determining the electrical parameters of an X-ray tube, comprising: acquiring projection data of a target object scanned by an imaging device at a first scanning angle; acquiring preset target noise data of the target object; determining current noise data of the projection data based on the projection data; and determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data.

[0130] like Figure 2 The diagram shown is a flowchart of an embodiment of the method for determining the electrical parameters of an X-ray tube in this application. The method for determining the electrical parameters of an X-ray tube includes the following steps 201 to 204:

[0131] 201. Acquire the projection data of the target object scanned by the imaging device at the first scanning angle.

[0132] The target object can be the patient's target point, target area, or other reference human body area.

[0133] The scanning angle is the angle formed between the imaging device and a preset reference object. The preset reference object can be a horizontal line on the ground, a tangent plane of the target object, or a horizontal plane of the object carrying the target object. The scanning angle can also be the angle of rotation of the rotating carrier carrying the imaging device. The specific angle is not limited here.

[0134] It is understood that in some embodiments of this application, the scanning angle can be a preset angle value, such as a specific value like 1 degree, 5 degrees or 10 degrees, or it can be an angle value selected in real time during the scanning process.

[0135] 202. Obtain the preset target noise data of the target object.

[0136] Obtaining the preset target noise data of the target object can be achieved by: reconstructing the projection data to obtain reconstructed projection data; determining the image quality requirements of the target object based on the reconstructed projection data; and determining the target noise data of the target object based on the image quality requirements.

[0137] The target noise data is used to assess whether the current noise data meets the noise level requirements for clinical diagnosis.

[0138] It is understandable that different target objects have different image quality requirements under different examination purposes. Therefore, the target noise data to achieve different image quality requirements will also be different. For example, if the target object is a patient's head, because the image quality requirements for the head are high, the target noise data value for the head is relatively lower than that for other parts such as the chest and abdomen.

[0139] 203. Based on the projection data, determine the current noise data of the projection data.

[0140] The current noise data is used to represent the noise level of the projection data at the current scanning angle.

[0141] Specifically, in some embodiments of this application, determining the current noise data of the projection data based on the projection data can be achieved by: performing noise estimation on the projection data to obtain the current noise data of the projection data. Methods for performing noise estimation on the projection data to obtain the current noise data can include: Fourier transform noise estimation methods for projection data, noise estimation methods based on uniform image regions, noise estimation methods based on image filtering, noise estimation methods based on transform extraction of high-frequency components, noise estimation methods based on patching, noise estimation methods based on establishing a noise model, etc., and are not specifically limited here.

[0142] 204. Based on the target noise data and the current noise data, determine the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle.

[0143] After determining the current noise data of the projection data in step 203, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined based on the target noise data and the current noise data.

[0144] Among them, the X-ray tube electrical parameters are the electrical performance data of the X-ray tube, which may include X-ray tube voltage, X-ray tube current, X-ray tube resistance, X-ray tube power and X-ray tube frequency, etc. Preferably, the X-ray tube electrical parameters include X-ray tube voltage and X-ray tube current, but may also include only X-ray tube current.

[0145] In some embodiments of this application, the imaging device is a CBCT device.

[0146] The method for determining X-ray tube electrical parameters provided in this application involves acquiring projection data of a target object scanned by an imaging device at a first scanning angle, acquiring preset target noise data of the target object, determining current noise data of the projection data based on the projection data, and determining the X-ray tube electrical parameters for scanning the target object at a second scanning angle based on the target noise data and the current noise data. Without prior knowledge base establishment, appropriate X-ray tube electrical parameters are selected directly from the noise data estimated from the projection data. This improves the quality of the reconstructed image while reducing the radiation dose received by the patient, playing a crucial role in low-dose imaging for medical imaging equipment.

[0147] In some embodiments of this application, the step of acquiring projection data of the target object scanned by the imaging device at a first scanning angle includes the following steps: acquiring initial projection data of the target object scanned by the imaging device at the first scanning angle; filtering the initial projection data to obtain projection data of the target object scanned by the imaging device at the first scanning angle.

[0148] The initial projection data is the original projection data of the target object scanned at the target scanning angle, which is directly collected by the imaging device.

[0149] After acquiring the initial projection data of the target object scanned by the imaging device at the first scanning angle, since the acquired initial projection data is relatively complex, in some embodiments of this application, the step of filtering the initial projection data to obtain the projection data of the target object scanned by the imaging device at the first scanning angle includes the following steps: filtering the initial projection data using a step-by-step sliding window method according to preset sliding window parameters to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0150] The preset sliding window parameters may include the step window width n, the step distance m, and the number of adjustments i, etc. The initial projection data is filtered by step sliding window according to the preset sliding window parameters. This can be done by filtering the initial projection data by step sliding window according to the preset sliding window parameters and the formula 1+m*(i-1)~n+m*(i-1), where i is a positive integer.

[0151] After obtaining the projection data, in order to determine the current noise data of the projection data, in some embodiments of this application, determining the current noise data of the projection data includes the following steps: performing a spatial transformation on the projection data to determine the noise components of the projection data; and performing noise estimation on the projection data based on the noise components to obtain the current noise data of the projection data.

[0152] Specifically, performing a spatial transformation on the projection data to determine the noise component of the projection data can be achieved by: performing a Fourier spatial transformation on the projection data to obtain the three-dimensional Fourier space of the projection data; and decoupling and separating the noise component and signal component of the projection data based on the three-dimensional Fourier space to obtain the noise component of the projection data.

[0153] The method for determining the electrical parameters of an X-ray tube provided in this application improves the accuracy of adjusting the X-ray tube electrical parameters by filtering the initial projection data to obtain projection data suitable for adjusting the X-ray tube electrical parameters, and then determining the current noise data of the projection data based on the noise component of the projection data.

[0154] In some embodiments of this application, determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes the following steps: determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and a preset correspondence between noise data and X-ray tube electrical parameters; and determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target X-ray tube electrical parameters.

[0155] In some embodiments of this application, before determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and a preset correspondence between noise data and X-ray tube electrical parameters, the method further includes the following step: establishing a preset correspondence between noise data and X-ray tube electrical parameters.

[0156] The preset correspondence between noise data and X-ray tube electrical parameters is the correspondence between noise data, equivalent size, and X-ray tube electrical parameters; the equivalent size is the size of the equivalent material of the target object used to simulate the scanning process.

[0157] The equivalent size is the equivalent attenuation path length of the scanned object at a certain angle. For example, the equivalent material can be water with a density very close to that of the human body. For the human body, the equivalent size is: ∫u 人体 (z)dz=u 水 *Equivalent size, u is the linear attenuation coefficient of the material (such as water or human body), and z is the X-ray attenuation path.

[0158] Furthermore, establishing the preset correspondence between noise data and X-ray tube electrical parameters includes the following steps: obtaining noise data under different equivalent dimensions and different X-ray tube electrical parameters, and obtaining the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data.

[0159] Furthermore, the step of obtaining noise data under different equivalent dimensions and different X-ray tube electrical parameters, and obtaining the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data, includes the following steps: obtaining noise data under different equivalent dimensions and different X-ray tube electrical parameters; performing data augmentation processing on the noise data under different equivalent dimensions and different X-ray tube electrical parameters to obtain the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data.

[0160] The data augmentation process can be interpolation, fitting, or other data augmentation methods, and no specific method is limited here.

[0161] It should be noted that the target object has an equivalent size corresponding to each scanning angle, and the equivalent size of each scanning angle is the equivalent attenuation path length of each scanning angle.

[0162] After establishing a preset correspondence between noise data and X-ray tube electrical parameters, in some embodiments of this application, determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and the preset correspondence between noise data and X-ray tube electrical parameters includes the following steps: obtaining the current X-ray tube electrical parameters at the first scanning angle; determining the equivalent size of the target object based on the current noise data, the current X-ray tube electrical parameters, and the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters; and determining the target X-ray tube electrical parameters for scanning the target object based on the equivalent size of the target object and the target noise data.

[0163] Furthermore, in some embodiments of this application, determining the target X-ray tube electrical parameters for scanning the target object based on the equivalent size of the target object and the target noise data includes the following steps: determining a set of X-ray tube electrical parameters that match the target noise data and the equivalent size of the target object based on the equivalent size of the target object and the target noise data, as well as the correspondence between the noise data, the equivalent size, and the X-ray tube electrical parameters; and determining the target X-ray tube electrical parameters for scanning the target object from the set of X-ray tube electrical parameters.

[0164] Furthermore, in some embodiments of this application, determining the target X-ray tube electrical parameters for scanning the target object from the X-ray tube electrical parameter set includes the following steps: determining the dose value corresponding to each X-ray tube electrical parameter in the X-ray tube electrical parameter set; selecting the X-ray tube electrical parameter with the smallest dose value in the X-ray tube electrical parameter set as the target X-ray tube electrical parameter for scanning the target object.

[0165] The equivalent dimension is d, the X-ray tube electrical parameters include the X-ray tube voltage U and the X-ray tube current I, and the noise data is σ. 2 For example, the correspondence between noise data and X-ray tube electrical parameters is shown in Table 1.

[0166] Assuming the current X-ray tube voltage U is 80, the current X-ray tube current I is 100, and the current noise data σ is... 2 It is 20 and the target noise data σ 2 The value is 10. According to Table 1, the equivalent size d of the target object is 300. Based on the equivalent size d of the target object and the target noise data σ... 2 Determine the target noise data σ from Table 1. 2It is a set of X-ray tube electrical parameters matched by 10, which consists of two sets: one set has X-ray tube voltage U of 100 and X-ray tube current I of 70, and the other set has X-ray tube voltage U of 120 and X-ray tube current I of 50. From the above two sets of X-ray tube electrical parameters, the target X-ray tube electrical parameters corresponding to the target noise data are determined.

[0167] Table 1

[0168] Equivalent size d (mm) X-ray tube voltage U (kV) X-ray tube current I (mA) <![CDATA[Noise data σ 2 > 300 80 100 20 300 100 70 10 300 120 50 10

[0169] It is understood that Table 1 above is merely an example. In other embodiments of this application, there may be more equivalent dimensions and noise data of the target object, as well as more electrical parameters of the X-ray tube. Specific details are not limited here.

[0170] The method for determining X-ray tube electrical parameters provided in this application establishes a preset correspondence between noise data and X-ray tube electrical parameters. From the preset correspondence between noise data and X-ray tube electrical parameters, the target X-ray tube electrical parameters corresponding to the target noise data are determined. The above method provides the correspondence between the target object at different scanning angles, different X-ray tube electrical parameters, and different noise data. It can provide the optimal X-ray tube electrical parameter adjustment method based on noise data, thereby reducing the radiation dose received by the patient during the scanning process.

[0171] In addition to determining the target X-ray tube electrical parameters for scanning the target object at the second scanning angle based on the target noise data and the current noise data, other methods may be used to determine the target X-ray tube electrical parameters corresponding to the target noise data from the preset correspondence between noise data and X-ray tube electrical parameters, and to adjust the X-ray tube electrical parameters for scanning the target object at the second scanning angle based on the target X-ray tube electrical parameters.

[0172] Specifically, in some embodiments of this application, the X-ray tube electrical parameters include X-ray tube current and X-ray tube voltage. The X-ray tube current is adjustable while the X-ray tube voltage remains constant. Determining the X-ray tube electrical parameters for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes the following steps: obtaining the current X-ray tube current of the imaging device scanning the target object at the first scanning angle; adjusting the X-ray tube current of the imaging device for scanning the target object at the second scanning angle based on the target noise data, the current noise data, and the current X-ray tube current.

[0173] Specifically, obtaining the current X-ray tube current of the imaging device scanning the target object at the first scanning angle can be achieved by directly obtaining the current X-ray tube current of the imaging device scanning the target object at the first scanning angle when the X-ray tube voltage remains constant at a fixed value.

[0174] Furthermore, adjusting the X-ray tube current of the imaging device for scanning the target object at the second scanning angle based on the target noise data, the current noise data, and the current X-ray tube current can be achieved by: calculating the noise ratio at the first scanning angle based on the target noise data and the current noise data; and adjusting the X-ray tube current of the imaging device for scanning the target object at the second scanning angle based on the noise ratio and the current X-ray tube current.

[0175] In one specific embodiment, the target noise data is And the current noise data is For example, the noise ratio of the first scanning angle is Assuming the current of the X-ray tube is I, then the X-ray tube current used to scan the target object at the second scanning angle is... That is, when the X-ray tube voltage is a fixed value, the X-ray tube current used for scanning the target object at the second scanning angle can be directly adjusted according to the ratio of the target noise data and the current noise data.

[0176] The method for determining X-ray tube electrical parameters provided in this application embodiment offers a way to adjust only the X-ray tube current when the X-ray tube voltage is a fixed value. Based on the ratio of target noise data to current noise data, the X-ray tube current for scanning the target object at the next angle can be directly and quickly adjusted. This provides a variety of methods for determining X-ray tube electrical parameters while ensuring image imaging quality and scanning accuracy.

[0177] In some embodiments of this application, the X-ray tube electrical parameters include X-ray tube current and X-ray tube voltage. The X-ray tube current is adjustable while the X-ray tube voltage remains constant. Determining the X-ray tube electrical parameters for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes: acquiring the current X-ray tube current of the imaging device scanning the target object at the first scanning angle; and adjusting the X-ray tube current of the imaging device for scanning the target object at the second scanning angle based on the target noise data, the current noise data, and the current X-ray tube current.

[0178] In some embodiments of this application, determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data includes the following steps: when it is determined that the current noise data exceeds a preset noise data, determining the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data.

[0179] The preset noise data can be target noise data or other preset noise values, such as 10dB, 15dB, 20dB, etc.

[0180] In some embodiments of this application, for certain clinical scenarios, a diagnostic CT scan is required before performing a CBCT scan. The method for determining the X-ray tube electrical parameters can be as follows: acquiring projection data of the target object scanned by the imaging device at a first scanning angle; determining the planned angle of the target object based on the projection data; performing noise estimation based on the projection data corresponding to the planned angle to obtain angular noise data of the target object; simulating the projection data of the target object scanned by the imaging device at the first scanning angle to obtain simulated projection data of the target object; establishing a correspondence between noise data and X-ray tube electrical parameters based on the simulated projection data; and determining the X-ray tube electrical parameters of the imaging device used to scan the target object at a second scanning angle based on the angular noise data and the correspondence between the noise data and the X-ray tube electrical parameters.

[0181] In the method for determining X-ray tube electrical parameters provided in this application embodiment, the noise of the complete scan data is estimated in advance, and the changes in X-ray tube electrical parameters during the scanning process are determined in advance, reducing the uncertainty of adjusting the X-ray tube electrical parameters and ensuring the quality of medical imaging.

[0182] In certain clinical scenarios, a diagnostic scan can be performed before a medical device scan (such as a CBCT). Alternatively, based on the complete projection data of the diagnostic CT scan, the scanning angle can be divided into m scanning angle ranges (m is a positive integer), and the noise level of the projection data within each scanning angle range can be estimated. Then, the dose level can be planned based on the pre-scan dose level. This method allows for the estimation of the noise level of the complete scan data in advance and the determination of the changes in the X-ray tube electrical parameters before the scan operation.

[0183] like Figure 3 The diagram shown is a flowchart illustrating another embodiment of a method for determining the electrical parameters of an X-ray tube according to this application. This method includes the following steps 301-302:

[0184] 301. Obtain the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube.

[0185] The target object can be the patient's target point, target area, or other reference human body area.

[0186] The scanning angle is the angle formed between the imaging device and a preset reference object. The preset reference object can be a horizontal line on the ground, a tangent plane of the target object, or a horizontal plane of the object carrying the target object. The specific reference object is not limited here.

[0187] It is understood that in some embodiments of this application, the scanning angle can be a preset angle value, such as a specific value like 1 degree, 5 degrees or 10 degrees, or it can be an angle value selected in real time during the scanning process.

[0188] 302. Based on the correspondence, the X-ray tube electrical parameters of the first imaging device are determined as the corresponding X-ray tube electrical parameters at the corresponding scanning angle.

[0189] After obtaining the preset correspondence between different scanning angles and X-ray tube electrical parameters for the target object in step 301, the X-ray tube electrical parameters of the first imaging device are determined as the corresponding X-ray tube electrical parameters at the corresponding scanning angle according to the correspondence.

[0190] In some embodiments of this application, before obtaining the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube, the method further includes the following step: establishing the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube.

[0191] Furthermore, establishing a preset correspondence between different scanning angles of the target object and the X-ray tube electrical parameters includes the following steps: acquiring projection data of the target object scanned by the second imaging device at different scanning angles; acquiring preset target noise data of the target object; determining the noise data corresponding to the projection data at different scanning angles based on the projection data of the target object scanned at different scanning angles; determining the X-ray tube electrical parameters at different scanning angles based on the noise data corresponding to the projection data at different scanning angles and the target noise data; and establishing a correspondence between different scanning angles of the target object and the X-ray tube electrical parameters based on the X-ray tube electrical parameters at different scanning angles.

[0192] Furthermore, the first imaging device can be a CBCT device, and the second imaging device can be a CT device. The second imaging device scans the projection data of the target object at different scanning angles, which can be the second imaging device acquiring complete projection data of the target object during a single diagnostic procedure. For example, a CT device acquires complete projection data of the target object during a single diagnostic procedure.

[0193] To better implement the method for determining the electrical parameters of the X-ray tube in the embodiments of this application, based on the method for determining the electrical parameters of the X-ray tube, the embodiments of this application also provide a device for adjusting the electrical parameters of the X-ray tube, such as... Figure 4 As shown, the device 400 for adjusting the electrical parameters of the X-ray tube includes:

[0194] The first acquisition unit 401 is used to acquire projection data of the target object scanned by the imaging device at the first scanning angle;

[0195] The second acquisition unit 402 is used to acquire preset target noise data of the target object;

[0196] The determining unit 403 is used to determine the current noise data of the projection data based on the projection data;

[0197] The adjustment unit 404 is used to determine the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle based on the target noise data and the current noise data.

[0198] In some embodiments of this application, the first acquisition unit 401 is specifically used for:

[0199] Acquire the initial projection data of the target object scanned by the imaging device at the first scanning angle;

[0200] The initial projection data is filtered to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0201] In some embodiments of this application, the first acquisition unit 401 is specifically used for:

[0202] Based on preset sliding window parameters, the initial projection data is filtered using a step-by-step sliding window method to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

[0203] In some embodiments of this application, the determining unit 403 is specifically used for:

[0204] Perform spatial transformation on the projection data to determine the noise component of the projection data;

[0205] Based on the noise components, noise estimation is performed on the projection data to obtain the current noise data of the projection data.

[0206] In some embodiments of this application, the adjustment unit 404 is specifically used for:

[0207] Based on the target noise data, the current noise data, and the preset correspondence between noise data and X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

[0208] Based on the target X-ray tube electrical parameters, the imaging device is adjusted to scan the target object at a second scanning angle using the X-ray tube electrical parameters.

[0209] In some embodiments of this application, the adjustment unit 404 is specifically used for:

[0210] Obtain the current X-ray tube electrical parameters at the first scanning angle;

[0211] Based on the current noise data, the current X-ray tube electrical parameters, and the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, the equivalent size of the target object is determined.

[0212] Based on the equivalent size of the target object and the target noise data, the electrical parameters of the target X-ray tube used to scan the target object are determined.

[0213] In some embodiments of this application, the adjustment unit 404 is specifically used for:

[0214] Based on the equivalent size of the target object and the target noise data, as well as the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, a set of X-ray tube electrical parameters matching the target noise data and the equivalent size of the target object is determined;

[0215] From the set of X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

[0216] In some embodiments of this application, the adjustment unit 404 is specifically used for:

[0217] Determine the dose value corresponding to each X-ray tube electrical parameter in the X-ray tube electrical parameter set;

[0218] The X-ray tube electrical parameter with the smallest dose value in the set of X-ray tube electrical parameters is selected as the target X-ray tube electrical parameter for scanning the target object.

[0219] In some embodiments of this application, the X-ray tube current is adjustable while the X-ray tube voltage remains constant. The adjustment unit 404 is specifically used for:

[0220] The current X-ray tube current of the imaging device scanning the target object at the first scanning angle is obtained;

[0221] Based on the target noise data, the current noise data, and the current X-ray tube current, the imaging device adjusts the X-ray tube current for scanning the target object at a second scanning angle.

[0222] In some embodiments of this application, the adjustment unit 404 is specifically used for:

[0223] When it is determined that the current noise data exceeds the preset noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined based on the target noise data and the current noise data.

[0224] The device for adjusting X-ray tube electrical parameters provided in this application acquires projection data of a target object scanned by an imaging device at a first scanning angle, acquires preset target noise data of the target object, determines current noise data of the projection data based on the projection data, and determines the X-ray tube electrical parameters for scanning the target object at a second scanning angle based on the target noise data and the current noise data. Without prior knowledge base establishment, it directly selects appropriate X-ray tube electrical parameters from the noise data estimated from the projection data, improving the quality of the reconstructed image while reducing the radiation dose received by the patient, playing a crucial role in low-dose imaging of medical imaging equipment.

[0225] To better implement another method for determining the electrical parameters of an X-ray tube in the embodiments of this application, based on the method for determining the electrical parameters of an X-ray tube, the embodiments of this application also provide a device for adjusting the electrical parameters of an X-ray tube, such as... Figure 5 As shown, the device 500 for adjusting the electrical parameters of the X-ray tube includes:

[0226] The acquisition module 501 is used to acquire the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube;

[0227] The determining module 502 is used to determine the X-ray tube electrical parameters of the first imaging device as the corresponding X-ray tube electrical parameters at the corresponding scanning angle according to the correspondence relationship.

[0228] The device for adjusting X-ray tube electrical parameters provided in this application acquires projection data of a target object scanned by an imaging device at a first scanning angle, acquires preset target noise data of the target object, determines current noise data of the projection data based on the projection data, and determines the X-ray tube electrical parameters for scanning the target object at a second scanning angle based on the target noise data and the current noise data. Without prior knowledge base establishment, it directly selects appropriate X-ray tube electrical parameters from the noise data estimated from the projection data, improving the quality of the reconstructed image while reducing the radiation dose received by the patient, playing a crucial role in low-dose imaging of medical imaging equipment.

[0229] In some embodiments of this application, the apparatus further includes a setup module, the setup module being used for:

[0230] Before obtaining the preset correspondence between different scanning angles of the target object and the X-ray tube electrical parameters, a preset correspondence between different scanning angles of the target object and the X-ray tube electrical parameters is established.

[0231] In some embodiments of this application, the establishment module is specifically used for:

[0232] Acquire projection data of the target object scanned by the second imaging device at different scanning angles;

[0233] Obtain the preset target noise data of the target object;

[0234] Based on the projection data of the target object scanned at different scanning angles, noise data corresponding to the projection data at different scanning angles is determined.

[0235] Based on the noise data corresponding to the projection data at different scanning angles and the target noise data, the X-ray tube electrical parameters at different scanning angles are determined.

[0236] Based on the X-ray tube electrical parameters at different scanning angles, a correspondence between the target object's different scanning angles and the X-ray tube electrical parameters is established.

[0237] In some embodiments of this application, the second imaging device is a CT device.

[0238] This application embodiment also provides a host computer that integrates any of the devices for adjusting the electrical parameters of an X-ray tube provided in this application embodiment. The host computer includes:

[0239] One or more processors;

[0240] Memory; and

[0241] One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor in the steps of the method for determining X-ray tube electrical parameters as described in any of the above embodiments of the method for determining X-ray tube electrical parameters, or in the steps of the method for scanning target objects as described in any of the above embodiments of the method for scanning target objects.

[0242] like Figure 6 As shown, it illustrates a schematic diagram of the host structure involved in an embodiment of this application. Specifically:

[0243] The host may include components such as a processor 601 with one or more processing cores, a memory 602 with one or more computer-readable storage media, a power supply 603, and an input unit 604. Those skilled in the art will understand that... Figure 6 The host structure shown does not constitute a limitation on the host and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0244] Processor 601 is the control center of the host, connecting various parts of the host through various interfaces and lines. It performs various functions and processes data by running or executing software programs and / or modules stored in memory 602, and by calling data stored in memory 602, thereby providing overall monitoring of the host. Optionally, processor 601 may include one or more processing cores; processor 601 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. Preferably, processor 601 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the aforementioned modem processor may not be integrated into processor 601.

[0245] The memory 602 can be used to store software programs and modules. The processor 601 executes various functional applications and data processing by running the software programs and modules stored in the memory 602. The memory 602 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the host. In addition, the memory 602 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 volatile solid-state storage device. Accordingly, the memory 602 may also include a memory controller to provide the processor 601 with access to the memory 602.

[0246] The host also includes a power supply 603 that supplies power to the various components. Preferably, the power supply 603 can be logically connected to the processor 601 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 603 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0247] The host may also include an input unit 604, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0248] Although not shown, the host may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 601 in the host loads the executable files corresponding to the processes of one or more applications into the memory 602 according to the following instructions, and the processor 601 runs the applications stored in the memory 602 to realize various functions, as follows:

[0249] Acquire projection data of the target object scanned by the imaging device at the first scanning angle;

[0250] Obtain the preset target noise data of the target object;

[0251] Based on the projection data, determine the current noise data of the projection data;

[0252] Based on the target noise data and the current noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined.

[0253] In some embodiments of this application, a medical imaging system is also provided, including a host and an imaging device, wherein the host and the imaging device are communicatively connected, the host being the host described in the above embodiments of this application, and the imaging device being the imaging device described in other embodiments of this application.

[0254] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0255] Therefore, embodiments of this application provide a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk, etc. A computer program is stored thereon, which is loaded by a processor to execute steps in any of the methods for determining X-ray tube electrical parameters provided in embodiments of this application, or steps in any of the methods for scanning a target object. For example, the computer program loaded by the processor can execute the following steps:

[0256] Acquire projection data of the target object scanned by the imaging device at the first scanning angle;

[0257] Obtain the preset target noise data of the target object;

[0258] Based on the projection data, determine the current noise data of the projection data;

[0259] Based on the target noise data and the current noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined.

[0260] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0261] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0262] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0263] The above provides a detailed description of a method, host, and medical imaging system for determining X-ray tube electrical parameters provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for determining the electrical parameters of a X-ray tube, characterized in that, The method includes: Acquire projection data of the target object scanned by the imaging device at the first scanning angle; Obtain preset target noise data for the target object; the target noise data is used to assess whether the current noise data meets the noise level requirements for clinical diagnosis. Based on the projection data, determine the current noise data of the projection data, wherein the current noise data represents the noise level of the projection data at the current scanning angle; the determination of the current noise data of the projection data includes: Perform spatial transformation on the projection data to determine the noise component of the projection data; Based on the noise components, noise estimation is performed on the projection data to obtain the current noise data of the projection data; Based on the target noise data and the current noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined.

2. The method for determining the electrical parameters of a X-ray tube according to claim 1, characterized in that, The imaging device is a CBCT device.

3. The method for determining the electrical parameters of a X-ray tube according to claim 1, characterized in that, The acquisition of projection data of the target object scanned by the imaging device at the first scanning angle includes: Acquire the initial projection data of the target object scanned by the imaging device at the first scanning angle; The initial projection data is filtered to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

4. The method for determining the electrical parameters of a X-ray tube according to claim 3, characterized in that, The step of filtering the initial projection data to obtain the projection data of the target object scanned by the imaging device at the first scanning angle includes: Based on preset sliding window parameters, the initial projection data is filtered using a step-by-step sliding window method to obtain the projection data of the target object scanned by the imaging device at the first scanning angle.

5. The method for determining the electrical parameters of a X-ray tube according to claim 1, characterized in that, The step of determining the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle based on the target noise data and the current noise data includes: Based on the target noise data, the current noise data, and the preset correspondence between noise data and X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined. Based on the target X-ray tube electrical parameters, the X-ray tube electrical parameters of the imaging device for scanning the target object at a second scanning angle are determined.

6. The method for determining the electrical parameters of a X-ray tube according to claim 5, characterized in that, Before determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and the preset correspondence between noise data and X-ray tube electrical parameters, the method further includes: Establish a pre-defined correspondence between noise data and X-ray tube electrical parameters.

7. The method for determining the electrical parameters of a X-ray tube according to claim 6, characterized in that, The preset correspondence between noise data and X-ray tube electrical parameters is the correspondence between noise data, equivalent size, and X-ray tube electrical parameters. The establishment of the preset correspondence between noise data and X-ray tube electrical parameters includes: Noise data were obtained under different equivalent dimensions and different X-ray tube electrical parameters, and the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data was obtained.

8. The method for determining the electrical parameters of a X-ray tube according to claim 7, characterized in that, The process of acquiring noise data under different equivalent sizes and different X-ray tube electrical parameters, and obtaining the correspondence between equivalent size, X-ray tube electrical parameters, and noise data, includes: Obtain noise data under different equivalent sizes and different X-ray tube electrical parameters; The noise data under different equivalent dimensions and different X-ray tube electrical parameters are subjected to data augmentation processing to obtain the correspondence between equivalent dimensions, X-ray tube electrical parameters and noise data.

9. The method for determining the electrical parameters of a X-ray tube according to claim 5, characterized in that, The step of determining the target X-ray tube electrical parameters for scanning the target object based on the target noise data, the current noise data, and a preset correspondence between noise data and X-ray tube electrical parameters includes: Obtain the current X-ray tube electrical parameters at the first scanning angle; Based on the current noise data, the current X-ray tube electrical parameters, and the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, the equivalent size of the target object is determined. Based on the equivalent size of the target object and the target noise data, the electrical parameters of the target X-ray tube used to scan the target object are determined.

10. The method for determining the electrical parameters of a X-ray tube according to claim 9, characterized in that, The step of determining the target X-ray tube electrical parameters for scanning the target object based on the equivalent size of the target object and the target noise data includes: Based on the equivalent size of the target object and the target noise data, as well as the correspondence between the noise data, equivalent size, and X-ray tube electrical parameters, a set of X-ray tube electrical parameters matching the target noise data and the equivalent size of the target object is determined; From the set of X-ray tube electrical parameters, the target X-ray tube electrical parameters for scanning the target object are determined.

11. The method for determining the electrical parameters of a X-ray tube according to claim 10, characterized in that, Determining the target X-ray tube electrical parameters for scanning the target object from the set of X-ray tube electrical parameters includes: Determine the dose value corresponding to each X-ray tube electrical parameter in the X-ray tube electrical parameter set; The X-ray tube electrical parameter with the smallest dose value in the set of X-ray tube electrical parameters is selected as the target X-ray tube electrical parameter for scanning the target object.

12. The method for determining the electrical parameters of a X-ray tube according to claim 1, characterized in that, The electrical parameters of the X-ray tube include the X-ray tube current and the X-ray tube voltage.

13. The method for determining the electrical parameters of a X-ray tube according to claim 12, characterized in that, The X-ray tube current is adjustable while the X-ray tube voltage remains constant. The step of determining the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle based on the target noise data and the current noise data includes: The current X-ray tube current of the imaging device scanning the target object at the first scanning angle is obtained; Based on the target noise data, the current noise data, and the current X-ray tube current, the imaging device adjusts the X-ray tube current for scanning the target object at a second scanning angle.

14. The method for determining the electrical parameters of a X-ray tube according to claim 1, characterized in that, The step of determining the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle based on the target noise data and the current noise data includes: When it is determined that the current noise data exceeds the preset noise data, the X-ray tube electrical parameters of the imaging device for scanning the target object at the second scanning angle are determined based on the target noise data and the current noise data.

15. A method for determining the electrical parameters of a X-ray tube, characterized in that, The method includes: Obtain the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube; Based on the correspondence, the X-ray tube electrical parameters of the first imaging device are determined as the corresponding X-ray tube electrical parameters at the corresponding scanning angle; Before obtaining the preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube, the method further includes: Establish a preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube; The establishment of a preset correspondence between different scanning angles of the target object and the electrical parameters of the X-ray tube includes: Acquire projection data of the target object scanned by the second imaging device at different scanning angles; Obtain the preset target noise data of the target object; Based on the projection data of the target object scanned at different scanning angles, noise data corresponding to the projection data at different scanning angles is determined. Based on the noise data corresponding to the projection data at different scanning angles and the target noise data, the X-ray tube electrical parameters at different scanning angles are determined. Based on the X-ray tube electrical parameters at different scanning angles, a correspondence between the target object's different scanning angles and the X-ray tube electrical parameters is established.

16. The method for determining the electrical parameters of a X-ray tube according to claim 15, characterized in that, The second imaging device is a CT scanner.

17. A host computer, characterized in that, The host includes: One or more processors; Memory; and One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the method for determining the electrical parameters of an X-ray tube as claimed in any one of claims 1 to 14, or the method for determining the electrical parameters of an X-ray tube as claimed in any one of claims 15 to 16.

18. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to perform the steps in the method for determining the electrical parameters of an X-ray tube as described in any one of claims 1 to 14, or the steps in the method for determining the electrical parameters of an X-ray tube as described in any one of claims 15 to 16.

19. A medical system, characterized in that, It includes a host and an imaging device, the host and the imaging device being communicatively connected, and the host being the host as described in claim 17.

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