Alternating dual-energy oral cavity scanning method, device, equipment, medium and program

Abstract

The invention relates to the technical field of medical imaging, and provides an alternate dual-energy oral cavity scanning method, device, equipment, medium and program, and the method comprises the steps: generating an energy ray beam for a to-be-scanned object according to a preset ray generator; performing conversion control on the voltage of the energy ray beam according to a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam; alternately irradiating the high-voltage energy ray beam and the low-voltage energy ray beam according to a preset movement track at intervals, and acquiring attenuation signal data of the high-voltage energy ray beam and the low-voltage energy ray beam in real time; performing substance decomposition on the attenuation signal data to obtain scanning imaging data of the to-be-scanned object; by performing substance decomposition on the attenuation signal data, artifacts in traditional X-ray imaging can be effectively eliminated, the image contrast can be enhanced, tissue attenuation information under specific energy can be provided, and the imaging quality can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of medical imaging technology, and particularly to an alternating dual-energy oral scanning method, device, equipment, medium and program. Background Art

[0002] Cone-beam Computed Tomography (CBCT for short) is a medical imaging technology widely used in oral and maxillofacial imaging examinations. CBCT has the advantages of high resolution and low radiation dose, and can provide three-dimensional anatomical structure information to help doctors make more accurate diagnoses and treatment plans.

[0003] However, traditional CBCT systems usually use X-ray beams with mixed multi-color energies for scanning. After such a beam passes through the scanned object, the low-energy part is easily absorbed to varying degrees, resulting in relatively low accuracy of the attenuation coefficients obtained by tomographic imaging, and usually accompanied by problems such as severe beam hardening artifacts or metal artifacts. These artifacts will affect the image quality and thus cause certain troubles to doctors' clinical examinations and diagnoses.

[0004] Dual-energy CT can effectively reduce beam hardening artifacts and improve the accuracy of imaging by obtaining X-ray information of two different energies. At present, dual-energy CT technology has been widely applied to spiral CT equipment, and can achieve scanning of two-energy rays through instantaneous and rapid switching of kilovolts by a single tube. However, there are still some problems in the actual application of existing dual-energy CT technology in the oral field. For example, when existing dual-energy CT systems quickly switch between two energies, due to the relatively long switching time of tube current, the dose difference between the two energies is relatively large, which affects the quality of dual-energy imaging, and is usually accompanied by severe beam hardening artifacts or metal artifacts. Summary of the Invention

[0005] In view of the above problems, embodiments of the present invention provide an alternating dual-energy oral scanning method, device, equipment, medium and program to solve the technical problems of relatively large dose difference between two energies, affecting the quality of dual-energy imaging, beam hardening artifacts or metal artifacts.

[0006] In a first aspect, an embodiment of the present invention provides an alternating dual-energy oral scanning method, including:

[0007] Generating an energy ray beam towards an object to be scanned according to a preset ray generator;

[0008] Controlling the conversion of the voltage of the energy ray beam at a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam;

[0009] Utilize the high-voltage energy ray beam and the low-voltage energy ray beam to perform alternating interval irradiation along a preset movement trajectory, and collect the attenuation signal data of the high-voltage energy ray beam and the low-voltage energy ray beam in real time;

[0010] Perform material decomposition on the attenuation signal data to obtain the scanning imaging data of the object to be scanned.

[0011] According to an embodiment of the present invention, the conversion control of the voltage of the energy ray beam at a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam includes:

[0012] Calculate the high-voltage irradiation time and the low-voltage irradiation time according to a preset high voltage value, a low voltage value, and a preset fluctuation compensation constant;

[0013] Perform output conversion control on the preset ray generator according to the preset high voltage value and the high-voltage irradiation time to obtain a high-voltage energy ray beam;

[0014] Perform output conversion control on the preset ray generator according to the preset low voltage value and the low-voltage irradiation time to obtain a low-voltage energy ray beam.

[0015] According to an embodiment of the present invention, the utilization of the high-voltage energy ray beam and the low-voltage energy ray beam to perform alternating interval irradiation along a preset movement trajectory includes:

[0016] Calculate the ray beam interval time according to the high voltage value of the high-voltage energy ray beam and the low voltage value of the low-voltage energy ray beam;

[0017] Perform alternating interval irradiation on the high-voltage energy ray beam and the low-voltage energy ray beam along a preset movement trajectory according to the ray beam interval time.

[0018] According to an embodiment of the present invention, the material decomposition of the attenuation signal data includes:

[0019] Utilize back-projection operation to convert the attenuation signal data of the high-voltage energy ray beam and the low-voltage energy ray beam into three-dimensional attenuation image data to obtain high-voltage volume attenuation image data and low-voltage volume attenuation image data;

[0020] Perform data decomposition on the high-voltage volume attenuation image data and the low-voltage volume attenuation image data according to a preset base substance water and a base substance bone to obtain water decomposition coefficient image data and bone decomposition coefficient image data;

[0021] Calculate virtual monoenergetic image data at a preset energy level according to the decomposition coefficient image, and use the virtual monoenergetic image data as the scanning imaging data of the object to be scanned.

[0022] According to an embodiment of the present invention, the data decomposition of the high-pressure volume attenuation image data and the low-pressure volume attenuation image data based on the preset base substance water and base substance bone to obtain the decomposition coefficient image data of water and the decomposition coefficient image data of bone includes:

[0023] Decompose the high-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under high-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under high-pressure conditions and the decomposition coefficient image data of bone;

[0024] Use the following formula to decompose the high-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under high-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under high-pressure conditions and the decomposition coefficient image data of bone:

[0025]

[0026] where μ h and μ l respectively represent the high-pressure volume attenuation image data and the low-pressure volume attenuation image data, μ ah and μ bh respectively represent the attenuation coefficient of water under high-pressure conditions and the attenuation coefficient of bone under high-pressure conditions, μ al and μ bl respectively represent the attenuation coefficient of water under low-pressure conditions and the attenuation coefficient of bone under low-pressure conditions, and A and B respectively represent the decomposition coefficient image data of water and the decomposition coefficient image data of bone;

[0027] Decompose the low-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under low-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under low-pressure conditions and the decomposition coefficient image data of bone;

[0028] Calculate the decomposition coefficient image data of water and the decomposition coefficient image data of bone respectively according to the attenuation coefficient of water under high-pressure conditions, the attenuation coefficient of bone under high-pressure conditions, the attenuation coefficient of water under low-pressure conditions, the attenuation coefficient of bone under low-pressure conditions, the high-pressure volume attenuation image data and the low-pressure volume attenuation image data;

[0029] Use the following formula to calculate the decomposition coefficient image data of water and the decomposition coefficient image data of bone:

[0030]

[0031] where A and B respectively represent the decomposition coefficient image data of water and the decomposition coefficient image data of bone, μ h and μ lrespectively represent high-pressure volume attenuation image data and low-pressure volume attenuation image data, μ ah and μ bh respectively represent the attenuation coefficient of water under high-pressure conditions and the attenuation coefficient of bone under high-pressure conditions, μ al and μ bl respectively represent the attenuation coefficient of water under low-pressure conditions and the attenuation coefficient of bone under low-pressure conditions.

[0032] According to an embodiment of the present invention, calculating the virtual monoenergetic image data at a preset energy level based on the decomposition coefficient image includes:

[0033] Measuring the attenuation coefficient of water at the preset energy level and the attenuation coefficient of bone at the preset energy level respectively;

[0034] Calculating the virtual monoenergetic image data at the preset energy level by adding the product of the attenuation coefficient of water at the preset energy level and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone at the preset energy level and the decomposition coefficient image data of bone.

[0035] In a second aspect, an embodiment of the present invention provides an alternating dual-energy oral scanning device, including:

[0036] A ray generation module for generating an energy ray beam according to a preset ray generator;

[0037] A ray conversion module for controlling the conversion of the voltage of the energy ray beam at a preset time interval to obtain a high-pressure energy ray beam and a low-pressure energy ray beam;

[0038] An irradiation acquisition module for alternately irradiating at intervals along a preset movement trajectory using the high-pressure energy ray beam and the low-pressure energy ray beam, and collecting the attenuation signal data of the high-pressure energy ray beam and the low-pressure energy ray beam in real time;

[0039] A data decomposition module for decomposing the attenuation signal data to obtain the scanning imaging data of the object to be scanned.

[0040] In a third aspect, an embodiment of the present invention provides a computer device, including a memory, a processor, and a computer program stored on the memory, and the processor executes the computer program to implement the steps of the alternating dual-energy oral scanning method described in the above aspect.

[0041] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the alternating dual-energy oral scanning method described in the above aspect are implemented.

[0042] Fifth aspect, an embodiment of the present invention provides a computer program product, including a computer program which, when executed by a processor, implements the steps of the alternating dual-energy oral scanning method.

[0043] Compared with the prior art, the above technical solution of the present invention has the following beneficial effects:

[0044] Generating an energy ray beam through a preset ray generator can improve imaging accuracy and resolution, and can clearly distinguish different tissue structures and lesion areas in the oral cavity; by controlling the conversion of the voltage of the energy ray beam at a preset time interval to generate high-voltage and low-voltage energy ray beams, it can significantly improve imaging accuracy, optimize scanning efficiency, reduce radiation dose, and enhance the ability to distinguish substances; by alternately irradiating at intervals along a preset movement trajectory using the high-voltage energy ray beam and the low-voltage energy ray beam, it can ensure that after each energy switch, the system has enough time to reach a stable state, ensuring the accuracy and reliability of the collected high- and low-energy data, thereby improving the accuracy of subsequent material decomposition and the quality of the final image; by performing material decomposition on the attenuation signal data, it can effectively eliminate artifacts in traditional X-ray imaging, enhance image contrast, and provide tissue attenuation information at a specific energy, improving the accuracy and reliability of oral disease diagnosis; by performing data decomposition on the high-voltage volume attenuation image data and the low-voltage volume attenuation image data, it can extract the decomposition coefficient image data of water and the decomposition coefficient image data of bone reflecting the distribution of oral tissue components from the dual-energy CT data, providing more accurate information for subsequent tissue analysis and diagnosis, effectively separating and quantifying the contributions of different substances, and improving imaging quality and diagnosis accuracy; by calculating the virtual monoenergetic image data at a preset energy level, a virtual monoenergetic oral image at a specific energy can be synthesized, which has good contrast and clarity, highlighting the attenuation differences of different tissues, helping doctors to make more accurate diagnoses, and improving the quality of imaging. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0046] Figure 1 Shows the flowchart of the alternating dual-energy oral scanning method according to Embodiment 1 of the present invention;

[0047] Figure 2 Shows the functional module diagram of the alternating dual-energy oral scanning device according to Embodiment 2 of the present invention;

[0048] Figure 3 Shows a schematic diagram of the composition structure of an electronic device for implementing the alternating dual - energy oral scanning method according to the third embodiment of the present invention. Detailed implementation manners

[0049] The following further describes the present disclosure with reference to the embodiments shown in the drawings.

[0050] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0051] Embodiment 1

[0052] As Figure 1 shown, an alternating dual - energy oral scanning method provided by an embodiment of the present disclosure includes the following steps:

[0053] S1. Generate an energy ray beam towards an object to be scanned according to a preset ray generator.

[0054] In the embodiment of the present invention, the ray generator uses an X - ray tube, whose function is to generate an energy ray beam (X - ray) to penetrate the oral tissue to be scanned, and to obtain the internal structure information of the oral cavity by detecting the attenuation signal of the ray. Among them, the core principle of dual - energy scanning is to utilize the different attenuation characteristics of ray beams with different energies (such as high - voltage and low - voltage) for substances, so as to achieve the differentiation and imaging of different substances (such as water and bone).

[0055] Further, in dual - energy scanning, the ray generator generates ray beams with different energies by adjusting the voltage. The high - voltage ray beam has a higher penetration ability and is suitable for detecting high - density tissues, while the low - voltage ray beam is more suitable for detecting low - density tissues. By alternately generating high - voltage and low - voltage ray beams and combining the processing of attenuation signals, precise imaging of the internal structure of the oral cavity can be achieved. Among them, generating an energy ray beam towards the object to be scanned can perform tomographic CT scanning on the skull including the oral cavity part.

[0056] Specifically, in the embodiment of the present invention, step S1 can be implemented by a program of initializing the ray generator, setting initial parameters, aligning the X - ray tube with the object to be scanned, starting the X - ray tube irradiation, and the detector receiving the attenuation signal after the X - ray beam passes through the scanned object.

[0057] In the embodiment of the present invention, generating an energy ray beam through a preset ray generator can improve the imaging accuracy and resolution, and can clearly distinguish different tissue structures and lesion areas in the oral cavity.

[0058] S2. Perform conversion control on the voltage of the energy ray beam at a preset time interval to obtain a high - voltage energy ray beam and a low - voltage energy ray beam.

[0059] In an embodiment of the present invention, an alternating dual-energy scan is adopted. The voltage of the X-ray tube is rapidly switched between a high voltage (generating high-energy X-rays) and a low voltage (generating low-energy X-rays) at a preset time interval by a control circuit. For example, the high voltage of 120 kV is set to irradiate for 5 milliseconds, and then switched to the low voltage of 60 kV to irradiate for 5 milliseconds, and so on in a cycle, thereby generating alternating high- and low-energy ray beams. This alternating dual-energy scan can effectively utilize the differences in absorption of high- and low-energy X-rays in different tissues, achieve material decomposition, improve image quality, reduce artifacts, optimize radiation dose, and reduce the equipment cost and complexity compared with the dual X-ray tube design.

[0060] In an embodiment of the present invention, the voltage of the energy ray beam is converted and controlled at a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam, including:

[0061] Calculating the high-voltage irradiation time and the low-voltage irradiation time according to a preset high-voltage value, a low-voltage value, and a preset fluctuation compensation constant;

[0062] Performing output conversion control on the preset ray generator according to the preset high-voltage value and the high-voltage irradiation time to obtain a high-voltage energy ray beam;

[0063] Performing output conversion control on the preset ray generator according to the preset low-voltage value and the low-voltage irradiation time to obtain a low-voltage energy ray beam.

[0064] In an embodiment of the present invention, the fluctuation compensation constants (voltage rise compensation constant C_up and voltage drop compensation constant C_down) are time parameters used to correct the delay and fluctuation that occur during the switching of the X-ray tube voltage, and are respectively used for adjustment based on the high-voltage and low-voltage irradiation times to ensure that the actually generated X-ray energy and intensity are as consistent as possible with the preset target values, thereby improving the material decomposition accuracy and image quality of the alternating dual-energy oral scan.

[0065] In an embodiment of the present invention, the high-voltage irradiation time and the low-voltage irradiation time can be calculated using the following formula:

[0066]

[0067] where U l and U h respectively represent the voltage values set for low energy and high energy, and α represents the fluctuation compensation constant, which is set to 1 in this embodiment.

[0068] Specifically, based on the preset high and low voltage values and the fluctuation compensation constant, calculate the compensated high and low voltage irradiation times respectively; then, use the calculated high voltage value and high voltage irradiation time to control the ray generator to output a high voltage energy ray beam; similarly, use the low voltage value and low voltage irradiation time to control the ray generator to output a low voltage energy ray beam, so as to realize the alternating emission of high and low energy ray beams.

[0069] In the embodiment of the present invention, by controlling the conversion of the voltage of the energy ray beam at a preset time interval to generate high and low voltage energy ray beams, the imaging accuracy can be significantly improved, the scanning efficiency can be optimized, the radiation dose can be reduced, and the material discrimination ability can be enhanced.

[0070] S3. Use the high voltage energy ray beam and the low voltage energy ray beam to perform alternating interval irradiation along a preset motion trajectory, and collect the attenuation signal data of the high voltage energy ray beam and the low voltage energy ray beam in real time.

[0071] In the embodiment of the present invention, the high-energy and low-energy X-ray beams are rotated and scanned around the patient's oral cavity along a preset motion trajectory, for example, and the object to be scanned is irradiated alternately at intervals. After each high-energy or low-energy ray beam irradiation, the detector placed on the opposite side of the oral cavity collects the attenuation signal data of the X-ray penetrating the oral tissue in real time. In this way, the attenuation information of the oral tissue at two high and low energies can be obtained, providing basic data for subsequent material decomposition. At the same time, the rotational scanning can cover the entire oral cavity, realizing three-dimensional imaging and ensuring that the scanning data has sufficient integrity, thereby improving the scanning coverage and the accuracy of material decomposition.

[0072] In the embodiment of the present invention, the use of the high voltage energy ray beam and the low voltage energy ray beam to perform alternating interval irradiation along a preset motion trajectory includes:

[0073] Calculate the ray beam interval time according to the high voltage value of the high voltage energy ray beam and the low voltage value of the low voltage energy ray beam;

[0074] According to the ray beam interval time, perform alternating interval irradiation on the high voltage energy ray beam and the low voltage energy ray beam along a preset motion trajectory.

[0075] In the embodiment of the present invention, the following formula can be used to calculate the ray beam interval time:

[0076] t i =max(t↑(U l ,U h ),t↓(U h ,U l ),t d )*s

[0077] where t↑(U l ,U h ) is the maximum stable time for the voltage to switch from U l to U h , and t↓(U h ,U l ) is the maximum stable time for the voltage to switch from U h to U l . t d is the longest response time of the detector, and s is the safety factor (S>1).

[0078] Specifically, according to the high and low voltage values, combined with the switching characteristics of the X-ray tube and the detector response time, a suitable beam interval time is calculated using a formula to ensure stable voltage switching and complete data acquisition. According to the calculated beam interval time, high-voltage and low-voltage energy beams are alternately emitted on a preset scanning trajectory; after each emission, wait for an interval time and then switch to the other energy beam for irradiation, and so on in a cycle to complete the scanning of the entire oral cavity.

[0079] In the embodiment of the present invention, by alternately irradiating at intervals with the high-voltage energy beam and the low-voltage energy beam on a preset movement trajectory, it can be ensured that after each energy switch, the system has enough time to reach a stable state, ensuring that the collected high and low energy data is accurate and reliable, thereby improving the accuracy of subsequent material decomposition and the quality of the final image.

[0080] S4. Perform material decomposition on the attenuation signal data to obtain the scanning imaging data of the object to be scanned.

[0081] In the embodiment of the present invention, the high-energy and low-energy X-ray attenuation signal data collected by the detector is converted into three-dimensional attenuation images at high and low energies through back-projection operation. Based on preset basis materials (such as water and bone), material decomposition is performed on these attenuation images to obtain water decomposition coefficient image data and bone decomposition coefficient image data. Finally, through the decomposition coefficient image, a virtual monoenergetic image at a preset energy level is calculated, and this virtual monoenergetic image is the final scanning imaging data for oral diagnosis and analysis.

[0082] In the embodiment of the present invention, the performing material decomposition on the attenuation signal data includes:

[0083] Converting the attenuation signal data of the high-voltage energy beam and the low-voltage energy beam into three-dimensional attenuation image data through back-projection operation to obtain high-voltage volumetric attenuation image data and low-voltage volumetric attenuation image data;

[0084] Decompose the high-pressure volume attenuation image data and the low-pressure volume attenuation image data according to the preset base substance water and base substance bone to obtain the decomposition coefficient image data of water and the decomposition coefficient image data of bone;

[0085] Calculate the virtual monoenergetic image data at a preset energy level according to the decomposition coefficient image, and use the virtual monoenergetic image data as the scanning imaging data of the object to be scanned.

[0086] In an embodiment of the present invention, by using back-projection operation, the two-dimensional attenuation signal data collected by the detector, which respectively correspond to the high-energy and low-energy X-ray beams penetrating the oral tissue, are reconstructed into three-dimensional attenuation image data at high energy and low energy. This process simulates the inverse process of the X-ray penetration path, superimposes the projection data at different angles, and finally restores the three-dimensional spatial distribution information of the oral tissue structure, thereby realizing the conversion from projection data to three-dimensional images.

[0087] In an embodiment of the present invention, the high-pressure and low-pressure volume attenuation image data are respectively regarded as being linearly combined by the preset base substance water and base substance bone. By solving the linear equations, the decomposition coefficient image data of water and the decomposition coefficient image data of bone are calculated, which reflect the content distribution of the base substance water and base substance bone in the oral tissue. Using the obtained decomposition coefficient image data of water and the decomposition coefficient image data of bone, as well as the mass attenuation coefficients of these two base substances at a preset energy level, the attenuation coefficient of each voxel at this preset energy level is calculated by weighted summation, thereby synthesizing a virtual monoenergetic image taken at this energy level. This image reflects the attenuation characteristics of the oral tissue at this specific energy and can be used as the final scanning imaging data for diagnosis.

[0088] Specifically, through the back-projection algorithm, the two-dimensional attenuation signals collected after the high- and low-energy X-rays penetrate the oral cavity are converted into corresponding three-dimensional volume attenuation images, and the high-pressure and low-pressure volume attenuation image data are respectively obtained; then, based on the preset base substance water and base substance bone, these attenuation images are decomposed into substances to obtain the decomposition coefficient image data of water and the decomposition coefficient image data of bone, which reflect the distribution of these two substances in the oral tissue; finally, using these decomposition coefficients, the virtual monoenergetic image data at a preset energy level is synthesized and used as the final scanning imaging data.

[0089] In an embodiment of the present invention, by decomposing the attenuation signal data into substances, the artifacts in traditional X-ray imaging can be effectively eliminated, the image contrast can be enhanced, and the tissue attenuation information at a specific energy can be provided, improving the accuracy and reliability of oral disease diagnosis.

[0090] In an embodiment of the present invention, decomposing the high-pressure volume attenuation image data and the low-pressure volume attenuation image data according to the preset base substance water and base substance bone to obtain the decomposition coefficient image data of water and the decomposition coefficient image data of bone includes:

[0091] Decompose the high-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under high-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under high-pressure conditions and the decomposition coefficient image data of bone;

[0092] Decompose the low-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under low-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under low-pressure conditions and the decomposition coefficient image data of bone;

[0093] Calculate the decomposition coefficient image data of water and the decomposition coefficient image data of bone respectively according to the attenuation coefficient of water under high-pressure conditions, the attenuation coefficient of bone under high-pressure conditions, the attenuation coefficient of water under low-pressure conditions, the attenuation coefficient of bone under low-pressure conditions, the high-pressure volume attenuation image data, and the low-pressure volume attenuation image data.

[0094] In an embodiment of the present invention, the following formula can be used to decompose the high-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under high-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under high-pressure conditions and the decomposition coefficient image data of bone;

[0095] Decompose the low-pressure volume attenuation image data into the sum of the product of the attenuation coefficient of water under low-pressure conditions and the decomposition coefficient image data of water and the product of the attenuation coefficient of bone under low-pressure conditions and the decomposition coefficient image data of bone:

[0096]

[0097] where μ h and μ l respectively represent the high-pressure volume attenuation image data and the low-pressure volume attenuation image data, μ ah and μ bh respectively represent the attenuation coefficient of water under high-pressure conditions and the attenuation coefficient of bone under high-pressure conditions, μ al and μ bl respectively represent the attenuation coefficient of water under low-pressure conditions and the attenuation coefficient of bone under low-pressure conditions, and A and B respectively represent the decomposition coefficient image data of water and the decomposition coefficient image data of bone;

[0098] Solving the formula can obtain the formula:

[0099]

[0100] Therefore, the image data of the decomposition coefficient of water and the image data of the decomposition coefficient of bone can be obtained.

[0101] Specifically, the high-pressure and low-pressure volume attenuation image data are respectively deconstructed into the form of the sum of the product of the attenuation coefficient of water and the attenuation coefficient of bone and the corresponding decomposition coefficient image data, and a linear equation set describing the relationship between the image and the basis substances is established; then, by using the attenuation coefficient of water, the attenuation coefficient of bone, and the high- and low-pressure volume attenuation image data, the image data of the decomposition coefficient of water and the image data of the decomposition coefficient of bone are calculated by solving the linear equation set.

[0102] In the embodiment of the present invention, by performing data decomposition on the high-pressure volume attenuation image data and the low-pressure volume attenuation image data, the image data of the decomposition coefficient of water and the image data of the decomposition coefficient of bone reflecting the distribution of oral tissue components can be extracted from the dual-energy CT data, providing more accurate information for subsequent tissue analysis and diagnosis, effectively separating and quantifying the contributions of different substances, and improving the imaging quality and diagnostic accuracy.

[0103] In the embodiment of the present invention, calculating the virtual monoenergetic image data at a preset energy level according to the decomposition coefficient image includes:

[0104] Measuring the attenuation coefficient of water at the preset energy level and the attenuation coefficient of bone at the preset energy level respectively;

[0105] Calculating the virtual monoenergetic image data at the preset energy level according to the sum of the product of the attenuation coefficient of water at the preset energy level and the image data of the decomposition coefficient of water and the product of the attenuation coefficient of bone at the preset energy level and the image data of the decomposition coefficient of bone.

[0106] In the embodiment of the present invention, the attenuation coefficient of water at the preset energy level and the attenuation coefficient of bone at the preset energy level refer to the degree to which a substance absorbs or scatters X-rays at a specific energy, and are important parameters for weighted calculation when synthesizing the virtual monoenergetic image, ensuring that the synthesized virtual monoenergetic image can accurately reflect the attenuation characteristics of oral tissues at this energy.

[0107] In the embodiment of the present invention, the following formula can be used to calculate the virtual monoenergetic image data at the preset energy level according to the sum of the product of the attenuation coefficient of water at the preset energy level and the image data of the decomposition coefficient of water and the product of the attenuation coefficient of bone at the preset energy level and the image data of the decomposition coefficient of bone:

[0108] μ E =μ a_E A+μ b_E B

[0109] Wherein, A and B respectively represent the image data of the decomposition coefficient of water and the image data of the decomposition coefficient of bone, μ a_E and μ b_Erespectively represent the attenuation coefficient of water and bone at a preset energy level and the attenuation coefficient of bone at the preset energy level.

[0110] In the embodiments of the present invention, by calculating the virtual monoenergetic image data at a preset energy level, an oral virtual monoenergetic image at a specific energy can be synthesized. This image has good contrast and clarity, highlighting the attenuation differences of different tissues, which helps doctors make more accurate diagnoses and improve the quality of imaging.

[0111] Embodiment Two

[0112] As Figure 2 shown, this embodiment also provides a functional module diagram of an alternating dual-energy oral scanning device.

[0113] The alternating dual-energy oral scanning device 100 described in this embodiment can be installed in an electronic device. According to the functions achieved, the alternating dual-energy oral scanning device 100 may include a ray generation module 101, a ray conversion module 102, an irradiation acquisition module 103, and a data decomposition module 104. The modules in the present invention can also be referred to as units, which refer to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, and are stored in the memory of the electronic device.

[0114] In this embodiment, the functions of each module / unit are as follows:

[0115] The ray generation module 101 is used to generate an energy ray beam towards the object to be scanned according to a preset ray generator;

[0116] The ray conversion module 102 is used to control the conversion of the voltage of the energy ray beam at a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam;

[0117] The irradiation acquisition module 103 is used to alternately irradiate at intervals on a preset movement trajectory by using the high-voltage energy ray beam and the low-voltage energy ray beam, and to collect the attenuation signal data of the high-voltage energy ray beam and the low-voltage energy ray beam in real time;

[0118] The data decomposition module 104 is used to decompose the attenuation signal data to obtain the scanning imaging data of the object to be scanned.

[0119] Specifically, in the alternating dual-energy oral scanning device 100 described in the embodiments of the present invention, each module uses the same technical means as the alternating dual-energy oral scanning method described in Embodiment One when in use, and can produce the same technical effects, which will not be elaborated here.

[0120] Embodiment Three

[0121] As shown Figure 3 in the figure, this embodiment also provides a computer electronic device, which may include a processor 10, a memory 11, a communication bus 12, and a communication interface 13. It may also include a computer program stored in the memory 11 and executable on the processor 10, such as an alternating dual-energy oral scanning program.

[0122] Among them, the processor 10 may be composed of integrated circuits in some embodiments. For example, it may be composed of a single packaged integrated circuit, or may be composed of multiple integrated circuits with the same or different functions, including a combination of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control core (Control Unit) of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. By running or executing programs or modules stored in the memory 11 (such as executing the alternating dual-energy oral scanning program, etc.), and by calling data stored in the memory 11, it can perform various functions of the electronic device and process data.

[0123] The memory 11 includes at least one type of readable storage medium, which includes flash memory, mobile hard disks, multimedia cards, card-type memories (such as SD or DX memories, etc.), magnetic memories, magnetic disks, optical disks, etc. The memory 11 may be an internal storage unit of the electronic device in some embodiments, such as the mobile hard disk of the electronic device. The memory 11 may also be an external storage device of the electronic device in other embodiments, such as a plug-in mobile hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device. Further, the memory 11 may also include both an internal storage unit and an external storage device of the electronic device. The memory 11 can not only be used to store application software installed on the electronic device and various types of data, such as the code of the alternating dual-energy oral scanning program, etc., but can also be used to temporarily store data that has been output or will be output.

[0124] The communication bus 12 can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. This bus can be divided into an address bus, a data bus, a control bus, etc. The bus is configured to enable connection communication between the memory 11 and at least one processor 10, etc.

[0125] The communication interface 13 is used for communication between the above-mentioned electronic device and other devices, including a network interface and a user interface. Optionally, the network interface can include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), and is generally used to establish a communication connection between this electronic device and other electronic devices. The user interface can be a display, an input unit (such as a keyboard), and optionally, the user interface can also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display can be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. Among them, the display can also be appropriately referred to as a display screen or a display unit, and is used to display the information processed in the electronic device and to display a visual user interface.

[0126] Only the electronic device with components is shown in the figure. Those skilled in the art can understand that the structure shown in the figure does not constitute a limitation on the electronic device, and it can include fewer or more components than shown in the figure, or combine some components, or have a different component layout.

[0127] For example, although not shown, the electronic device can also include a power source (such as a battery) for powering each component. Preferably, the power source can be logically connected to the at least one processor 10 through a power management device, so as to implement functions such as charge management, discharge management, and power consumption management through the power management device. The power source can also include any components such as one or more DC or AC power sources, a recharge device, a power failure detection circuit, a power converter or an inverter, and a power status indicator. The electronic device can also include various sensors, a Bluetooth module, a Wi-Fi module, etc., which will not be elaborated here.

[0128] It should be understood that the above embodiments are only for illustrative purposes and are not limited by this structure in the scope of the patent application.

[0129] The alternating dual-energy oral scanning program stored in the memory 11 of the electronic device is a combination of multiple instructions, and when running in the processor 10, it can achieve:

[0130] Generating an energy ray beam towards the object to be scanned according to a preset ray generator;

[0131] Converting and controlling the voltage of the energy ray beam at a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam;

[0132] Using the high-voltage energy ray beam and the low-voltage energy ray beam to alternately irradiate at intervals along a preset movement trajectory, and collecting attenuation signal data of the high-voltage energy ray beam and the low-voltage energy ray beam in real time;

[0133] Decomposing the attenuation signal data to obtain scanning imaging data of the object to be scanned.

[0134] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to the description of the relevant steps in the corresponding embodiments of the attached drawings, which will not be elaborated here.

[0135] Furthermore, if the integrated module / unit of the electronic device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disc, a computer memory, a read-only memory (ROM, Read-Only Memory).

[0136] Embodiment 4

[0137] This embodiment provides a storage medium storing a computer program, and when the computer program is executed by a processor, it realizes the steps of the alternating dual-energy oral scanning method as described above.

[0138] These program codes can also be loaded onto a computer or other programmable data processing devices, so that a series of operation steps are executed on the computer or other programmable devices to generate computer-implemented processing, and thus the instructions executed on the computer or other programmable devices provide steps for realizing the functions specified in one process Figure 1 or multiple processes.

[0139] A storage medium includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of storage media can include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassette tapes, disk storage, or other magnetic storage devices, or any other non-transitory medium that can be used to store information that can be accessed by a computing device.

[0140] In several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there can be other division methods in actual implementation.

[0141] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0142] In addition, in each embodiment of the present invention, the functional modules can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of a combination of hardware and software functional modules.

[0143] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms.

[0144] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is not limited only by the above description. Therefore, it is intended to include all changes within the meaning and scope of equivalent elements that fall within the scope of protection of the present invention.

[0145] The embodiments of the present application can acquire and process relevant data based on artificial intelligence technology. Among them, artificial intelligence (AI) is a theory, method, technology, and application system that uses a digital computer or a machine controlled by a digital computer to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use the knowledge to obtain the best results.

[0146] In addition, it is obvious that the term "including" does not exclude other units or steps, and the singular does not exclude the plural. The multiple units or devices stated in the system claims can also be implemented by one unit or device through software or hardware. The terms such as first and second are used to represent names and do not represent any specific order.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An alternating dual-energy oral scanning method, characterized in that: The method comprises: Generate an energy ray beam toward the object to be scanned according to a preset ray generator; Controlling the voltage of the energy ray beam by switching at preset time intervals to obtain a high-voltage energy ray beam and a low-voltage energy ray beam; Using the high-pressure energy ray beam and the low-pressure energy ray beam to alternately irradiate at intervals along a preset motion trajectory, and collecting attenuation signal data of the high-pressure energy ray beam and the low-pressure energy ray beam in real time; The attenuation signal data is subjected to material decomposition to obtain scanning imaging data of the object to be scanned.

2. The alternating dual-energy oral scanning method according to claim 1, characterized in that: The voltage of the energy ray beam is converted and controlled at a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam, including: Calculate the high voltage irradiation time and the low voltage irradiation time according to the preset high voltage value, the low voltage value and the preset fluctuation compensation constant; Performing output conversion control on the preset ray generator according to the preset high voltage value and the high voltage irradiation time to obtain a high voltage energy ray beam; The preset ray generator is controlled to output conversion according to the preset low voltage value and the low voltage irradiation time to obtain a low-voltage energy ray beam.

3. The alternating dual-energy oral scanning method according to claim 1, characterized in that: The method of using the high-pressure energy ray beam and the low-pressure energy ray beam to perform irradiation alternately and at intervals along a preset motion trajectory includes: Calculating the beam interval time according to the high voltage value of the high-voltage energy beam and the low voltage value of the low-voltage energy beam; According to the beam interval time, the high-pressure energy beam and the low-pressure energy beam are alternately irradiated along a preset motion trajectory.

4. The alternating dual-energy oral scanning method according to claim 1, characterized in that: The performing material decomposition on the attenuation signal data comprises: The attenuation signal data of the high-pressure energy ray beam and the low-pressure energy ray beam are converted into three-dimensional attenuation image data by back-projection operation to obtain high-pressure volume attenuation image data and low-pressure volume attenuation image data; Decomposing the high-pressure volume attenuation image data and the low-pressure volume attenuation image data according to preset base material water and base material bone to obtain water decomposition coefficient image data and bone decomposition coefficient image data; Virtual monoenergetic image data at a preset energy level is calculated according to the decomposition coefficient image, and the virtual monoenergetic image data is used as scanning imaging data of the object to be scanned.

5. The alternating dual-energy oral scanning method according to claim 4, characterized in that: The step of performing data decomposition on the high pressure volume attenuation image data and the low pressure volume attenuation image data according to the preset base material water and the base material bone to obtain the water decomposition coefficient image data and the bone decomposition coefficient image data includes: Decomposing the high-pressure volume attenuation image data into a product of an attenuation coefficient of water under high-pressure conditions and image data of a decomposition coefficient of water and a product of an attenuation coefficient of bone under high-pressure conditions and image data of a decomposition coefficient of bone, and adding the products; The high-pressure volume attenuation image data is decomposed into the product of the attenuation coefficient of water under high-pressure conditions and the image data of the decomposition coefficient of water and the product of the attenuation coefficient of bone under high-pressure conditions and the image data of the decomposition coefficient of bone using the following formula: Among them, μ h and μ l Respectively represent high pressure volume attenuation image data and low pressure volume attenuation image data, μ ah and μ bh represent the attenuation coefficient of water under high pressure and the attenuation coefficient of bone under high pressure, μ al and μ bl denote the attenuation coefficient of water under low pressure and the attenuation coefficient of bone under low pressure, respectively; A and B denote the decomposition coefficient image data of water and the decomposition coefficient image data of bone, respectively; Decomposing the low-pressure volume attenuation image data into a product of an attenuation coefficient of water under low-pressure conditions and image data of a decomposition coefficient of water and a product of an attenuation coefficient of bone under low-pressure conditions and image data of a decomposition coefficient of bone, and adding the products; Calculating water decomposition coefficient image data and bone decomposition coefficient image data respectively according to the attenuation coefficient of water under high pressure, the attenuation coefficient of bone under high pressure, the attenuation coefficient of water under low pressure, the attenuation coefficient of bone under low pressure, the high pressure volume attenuation image data and the low pressure volume attenuation image data; The water decomposition coefficient image data and the bone decomposition coefficient image data are calculated using the following formula: Among them, A and B represent the decomposition coefficient image data of water and bone respectively, μ h and μ l Respectively represent high pressure volume attenuation image data and low pressure volume attenuation image data, μ ah and μ bh represent the attenuation coefficient of water under high pressure and the attenuation coefficient of bone under high pressure, μ al and μ bl They represent the attenuation coefficient of water under low pressure and the attenuation coefficient of bone under low pressure respectively.

6. The alternating dual-energy oral scanning method according to claim 4, characterized in that: The step of calculating virtual monoenergetic image data at a preset energy level according to the decomposition coefficient image comprises: respectively measuring the attenuation coefficient of water at a preset energy level and the attenuation coefficient of bone at a preset energy level; The virtual monoenergetic image data at the preset energy level is calculated by adding the product of the attenuation coefficient of water at the preset energy level and the image data of the decomposition coefficient of water to the product of the attenuation coefficient of bone at the preset energy level and the image data of the decomposition coefficient of bone.

7. An alternating dual-energy oral scanning device, characterized in that: The device comprises: A ray generation module, used to generate an energy ray beam toward the object to be scanned according to a preset ray generator; A ray conversion module, used to control the conversion of the voltage of the energy ray beam according to a preset time interval to obtain a high-voltage energy ray beam and a low-voltage energy ray beam; An irradiation collection module, used to use the high-pressure energy ray beam and the low-pressure energy ray beam to perform alternate irradiation at intervals along a preset motion trajectory, and to collect attenuation signal data of the high-pressure energy ray beam and the low-pressure energy ray beam in real time; The data decomposition module is used to perform material decomposition on the attenuation signal data to obtain scanning imaging data of the object to be scanned.

8. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the alternating dual-energy oral scanning method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the alternating dual-energy oral scanning method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the alternating dual-energy oral scanning method according to any one of claims 1 to 6 are implemented.

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