Scanning dose and image quality balance control method and related equipment

Abstract

The invention provides a scanning dose and image quality balance control method and related equipment, and relates to the technical field of medical imaging. The scanning task type information and the patient feature information are obtained, the optimal combination is selected from the preset scanning parameter combination library based on the information, and finally SPECT / CT scanning is executed according to the selected scanning parameter combination, so that the problem that the image quality is substandard or the radiation dose is too high due to the fact that parameters are manually set in the prior art is effectively solved, and the SPECT / CT scanning efficiency is improved. The balance control of the scanning dose and the image quality is realized, and the accuracy and the safety of diagnosis are improved.

Description

Technical Field

[0001] This application relates to the field of medical imaging technology, and more specifically, to a method and related equipment for balancing scanning dose and image quality. Background Technology

[0002] In SPECT / CT imaging systems, patients receive an injection of a radioactive tracer, followed by CT anatomical imaging and SPECT functional metabolic imaging. Due to individual patient differences (such as body size, scan site, and physical condition) and the diversity of scan types (such as cardiac, brain, and whole-body scans), it is difficult to achieve a good balance between image quality and radiation dose using uniform scan dose and image acquisition parameters. Currently, operators typically manually set parameters such as tube voltage, tube current, and exposure time of the CT module, as well as rotation angle and acquisition time of the SPECT module, based on experience. This method is highly subjective and can easily lead to substandard image quality or excessive radiation dose.

[0003] This issue is particularly prominent in scans of radiation-sensitive populations such as children and pregnant women, requiring dose reduction as much as possible while ensuring diagnostic image quality. However, directly reducing the dose may lead to a decrease in the signal-to-noise ratio and an increase in artifacts in CT images, thereby affecting the attenuation correction effect of SPECT images and ultimately reducing the quality of fused images. In tasks with high image quality requirements, such as tumor localization and cardiac function assessment, substandard image quality may lead to misdiagnosis or missed diagnosis. Current techniques that use dose strategies based on body weight or body thickness ignore individual anatomical differences and cannot achieve a precise match between dose and image quality.

[0004] There is currently no effective technical solution to the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a method and related equipment for balancing scan dose and image quality, which aims to ensure that the image quality meets diagnostic requirements while minimizing radiation dose. This effectively solves the problems of substandard image quality or excessive radiation dose caused by traditional manual parameter setting, achieves balanced control of scan dose and image quality, and improves the accuracy and safety of diagnosis.

[0006] In a first aspect, this application provides a method for balancing scan dose and image quality, applied to a SPECT / CT imaging system, which includes a CT module and a SPECT module; the method for balancing scan dose and image quality includes the following steps: A1. Obtain scanning task type information and patient characteristic information; A2. Based on the scanning task type information and patient characteristic information, select a scanning parameter combination from the preset scanning parameter combination library. The scanning parameter combination includes the scanning parameters of the CT module and the scanning parameters of the SPECT module. The preset scanning parameter combination library is constructed and optimized based on historical scanning data and clinical diagnostic standards to ensure that the image quality meets the diagnostic requirements and minimizes the radiation dose. A3. Perform a SPECT / CT scan based on the selected combination of scanning parameters.

[0007] Through the above scheme, this application can intelligently select the optimal combination of scanning parameters according to the specific scanning task type and patient characteristics, thereby minimizing the radiation dose while ensuring that the image quality meets the diagnostic requirements.

[0008] Optionally, the preset scan parameter combination library is obtained through the following steps: Based on historical scan data and clinical diagnostic criteria, diagnostic thresholds for image quality evaluation indicators and radiation dose evaluation indicators were set. Based on historical scan data and clinical diagnostic criteria, the weights of image quality evaluation indicators and radiation dose evaluation indicators were determined. For different scanning task types and patient characteristics, multiple candidate scanning parameter combinations can be obtained; For each candidate scan parameter combination, calculate the image quality evaluation index value and radiation dose evaluation index value of the candidate scan parameter combination; The comprehensive performance of candidate scanning parameter combinations is evaluated based on image quality evaluation index values, radiation dose evaluation index values, diagnostic thresholds of image quality evaluation indexes, diagnostic thresholds of radiation dose evaluation indexes, weights of image quality evaluation indexes, and weights of radiation dose evaluation indexes. For each combination of scanning task type and patient characteristics, the scanning parameter combination with the best overall performance is selected and added to the preset scanning parameter combination library.

[0009] Through this technical solution, this application can ensure, through a systematic evaluation process, that the selected combination of scanning parameters achieves the best balance between image quality and radiation dose while meeting diagnostic requirements, thereby improving the scientific rigor and objectivity of parameter selection.

[0010] Optionally, the step of evaluating the comprehensive performance of candidate scanning parameter combinations based on image quality evaluation index values, radiation dose evaluation index values, diagnostic thresholds for image quality evaluation indexes, diagnostic thresholds for radiation dose evaluation indexes, weights of image quality evaluation indexes, and weights of radiation dose evaluation indexes includes: The image quality evaluation index value of the candidate scanning parameter combination is compared with the diagnostic threshold of the image quality evaluation index, and the radiation dose evaluation index value of the candidate scanning parameter combination is compared with the diagnostic threshold of the radiation dose evaluation index to obtain the comparison results. Based on the comparison results, determine whether the candidate scanning parameter combinations meet the diagnostic requirements, and obtain the judgment result; The image quality evaluation index value is obtained by multiplying the image quality evaluation index value by the weight of the image quality evaluation index value, and the radiation dose evaluation index value is obtained by multiplying the radiation dose evaluation index value by the weight of the radiation dose evaluation index value. The weighted image quality evaluation index value and the weighted radiation dose evaluation index value are summed to obtain the comprehensive score; The judgment result and the overall score are used as the overall performance.

[0011] By using a weighted summation method, the contribution of different evaluation indicators to the overall performance can be more accurately reflected, thereby selecting a scanning parameter combination that better meets actual needs.

[0012] Optionally, the steps for obtaining candidate scan parameter combinations include: Set the scanning parameter range and scanning parameter step size for the CT module; Set the scan parameter range and scan parameter step size for the SPECT module; Based on the scanning parameter range and scanning parameter step size of the CT module, sample within the scanning parameter range of the CT module to obtain candidate scanning parameters of the CT module; Based on the scanning parameter range and scanning parameter step size of the SPECT module, samples are taken within the scanning parameter range of the SPECT module to obtain the candidate scanning parameters of the SPECT module; The candidate scan parameters from the CT module and the SPECT module are combined to generate a candidate scan parameter combination.

[0013] Optionally, each scan parameter combination in the preset scan parameter combination library has corresponding applicable conditions, including task type restrictions and patient characteristic restrictions. The steps for selecting a scan parameter combination from a pre-set scan parameter combination library based on scan task type information and patient characteristic information include: Based on the preset matching rules, the scanning task type information is compared with the task type limit, and the patient feature information is compared with the patient feature limit to obtain the comparison result; Based on the comparison results, scan parameter combinations that meet the applicable conditions are identified from the preset scan parameter combination library; From the identified combinations of scanning parameters, select the combination that has the highest matching degree with the scanning task type information and patient characteristic information.

[0014] Optionally, step A1 includes: The system receives scan task type information input by the operator through the user interface. The user interface receives patient characteristic information input by the operator.

[0015] Optionally, step A3 includes: Configure the scan parameters of the CT module in the selected scan parameter combination to the CT module; Configure the scan parameters of the SPECT module in the selected scan parameter combination to the SPECT module; Start the SPECT / CT scan sequence so that the CT module and SPECT module can acquire data according to their respective configured scan parameters.

[0016] Secondly, this application also provides a scanning dose and image quality balance control device, comprising: The acquisition module is used to acquire scanning task type information and patient characteristic information; The processing module is used to select a scanning parameter combination from a preset scanning parameter combination library based on scanning task type information and patient characteristic information. The scanning parameter combination includes scanning parameters from the CT module and scanning parameters from the SPECT module. The preset scanning parameter combination library is constructed and optimized based on historical scanning data and clinical diagnostic criteria to ensure that the image quality meets diagnostic requirements and minimizes radiation dose. The execution module is used to perform SPECT / CT scans based on the selected combination of scanning parameters.

[0017] Thirdly, this application provides an electronic device including a processor and a memory, the memory storing computer-readable instructions, which, when executed by the processor, perform the steps of the scanning dose and image quality balance control method provided in the first aspect above.

[0018] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the scanning dose and image quality balance control method provided in the first aspect above.

[0019] As described above, the scanning dose and image quality balance control method and related equipment provided in this application guide SPECT / CT scanning by acquiring scanning task type information and patient characteristic information, and selecting an optimal combination from a preset scanning parameter combination library based on this information. This preset scanning parameter combination library is constructed and optimized based on a large amount of historical scanning data and clinical diagnostic standards, aiming to ensure that image quality meets diagnostic requirements while minimizing radiation dose. This effectively solves the problems of substandard image quality or excessive radiation dose caused by traditional manual parameter settings, achieving a balance between scanning dose and image quality control, and improving the accuracy and safety of diagnosis.

[0020] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a flowchart of a scanning dose and image quality balance control method provided in an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the scanning dose and image quality balance control device provided in the embodiments of this application.

[0023] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0024] Labeling Explanation: 21. Acquisition Module; 22. Processing Module; 23. Execution Module; 13. Electronic Device; 1301. Processor; 1302. Memory; 1303. Communication Bus. Detailed Implementation

[0025] 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 a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Please refer to Figure 1 , Figure 1 This is a flowchart of a scanning dose and image quality balance control method in some embodiments of this application. It aims to ensure that image quality meets diagnostic requirements while minimizing radiation dose, thereby effectively solving the problems of substandard image quality or excessive radiation dose caused by traditional manual parameter settings. This achieves a balance control between scanning dose and image quality, improving the accuracy and safety of diagnosis.

[0028] In a first aspect, this application provides a method for balancing scan dose and image quality, applied to a SPECT / CT imaging system, the SPECT / CT imaging system including a CT module and a SPECT module; the method for balancing scan dose and image quality includes the following steps: A1. Obtain scanning task type information and patient characteristic information; A2. Based on the scanning task type information and patient characteristic information, select a scanning parameter combination from the preset scanning parameter combination library. The scanning parameter combination includes the scanning parameters of the CT module and the scanning parameters of the SPECT module. The preset scanning parameter combination library is constructed and optimized based on historical scanning data and clinical diagnostic standards to ensure that the image quality meets the diagnostic requirements and minimizes the radiation dose. A3. Perform a SPECT / CT scan based on the selected combination of scanning parameters.

[0029] A SPECT / CT imaging system is a medical imaging device that combines single-photon emission computed tomography (SPECT) and computed tomography (CT). The CT module primarily provides anatomical information, while the SPECT module provides functional metabolic information. Scan parameter combinations refer to the set of operating parameters required by both the CT and SPECT modules during a SPECT / CT scan. For example, CT module parameters include tube voltage, tube current, and exposure time, which directly affect CT image quality and the radiation dose received by the patient. SPECT module parameters include rotation angle, acquisition time, and detector distance, which affect the signal-to-noise ratio and spatial resolution of the SPECT image. A pre-built library of scan parameter combinations is a set of parameters that has been pre-constructed and optimized to ensure that the radiation dose received by the patient is minimized while meeting clinical diagnostic requirements.

[0030] The core of the scanning dose and image quality balance control method of this application lies in intelligently selecting a suitable combination of scanning parameters to achieve the best balance between image quality and radiation dose.

[0031] In step A1, it is necessary to obtain scan task type information and patient characteristic information. Scan task type information can be manually entered by the operator through the user interface; for example, the operator can select a preset task type such as "cardiac scan," "brain scan," or "whole body scan" on the system interface. Alternatively, it can be automatically obtained through an interface with a Hospital Information System (HIS) or Radiology Information System (RIS). When a doctor issues a scan order, the system automatically parses the task type in the order. Patient characteristic information can also be manually entered by the operator through the user interface; for example, the operator can enter the patient's age, gender, weight, height, and scan site. Alternatively, patient characteristic information can also be automatically extracted from the patient's electronic medical record through integration with the HIS / RIS system.

[0032] In step A2, a scan parameter combination is selected from a pre-set scan parameter combination library based on scan task type information and patient characteristic information. This library is constructed and optimized based on historical scan data and clinical diagnostic criteria to ensure image quality meets diagnostic requirements and minimizes radiation dose. For example, applicable conditions can be set for each pre-set scan parameter combination library, including task type limitations and patient characteristic limitations. When selecting a scan parameter combination, the currently acquired scan task type information is compared with the task type limitations, and the patient characteristic information is compared with the patient characteristic limitations, according to pre-set matching rules, thus obtaining comparison results. Based on the comparison results, scan parameter combinations that meet the applicable conditions can be identified from the pre-set scan parameter combination library. Finally, the scan parameter combination with the highest matching degree with the current scan task type information and patient characteristic information is selected from the identified scan parameter combinations. For example, if the patient is a child and the scan task is cardiac, low-dose, high-image-quality parameter combinations specifically optimized for pediatric cardiac scans are preferentially selected.

[0033] In step A3, a SPECT / CT scan is performed based on the selected combination of scanning parameters. Specifically, the scanning parameters of the CT module in the selected combination are configured in the CT module, such as setting the CT tube voltage, tube current, and exposure time. Simultaneously, the scanning parameters of the SPECT module in the selected combination are configured in the SPECT module, such as setting the SPECT rotation angle and acquisition time. After configuration, the SPECT / CT scan sequence is started, allowing both the CT and SPECT modules to acquire data according to their respective configured scanning parameters. Thus, the entire scanning process is performed according to preset optimized parameters, thereby minimizing the patient's radiation dose while ensuring image quality.

[0034] The scanning dose and image quality balance control method of this application effectively solves many problems caused by manually setting parameters in traditional SPECT / CT imaging by introducing an intelligent parameter selection mechanism. First, this method fully considers individual patient differences and the diversity of scanning tasks by acquiring scanning task type information and patient characteristic information. For example, for special populations such as children or pregnant women, it can automatically select low-dose, high-safety scanning parameters; for tasks with high image quality requirements, such as tumor localization or cardiac function assessment, it can ensure that the selected parameter combination provides image quality that meets diagnostic criteria.

[0035] Secondly, the core of this application lies in the fact that the pre-defined library of scanning parameter combinations is constructed and optimized based on a large amount of historical scanning data and clinical diagnostic criteria. This means that each parameter combination has undergone rigorous verification, ensuring that radiation dose is minimized while meeting diagnostic requirements.

[0036] Furthermore, this application achieves overall coordinated control of the multimodal imaging system by precisely configuring the selected scan parameter combination to the CT and SPECT modules and initiating the scan sequence. This solves the problem in some existing systems that only consider the noise level of CT images when adjusting the dose, while ignoring the acquisition requirements of the SPECT module, thus ensuring the overall quality and fusion effect of CT and SPECT images.

[0037] In some implementations, the preset scan parameter combination library is obtained through the following steps: Based on historical scan data and clinical diagnostic criteria, diagnostic thresholds for image quality evaluation indicators and radiation dose evaluation indicators were set. Based on historical scan data and clinical diagnostic criteria, the weights of image quality evaluation indicators and radiation dose evaluation indicators were determined. For different scanning task types and patient characteristics, multiple candidate scanning parameter combinations can be obtained; For each candidate scan parameter combination, calculate the image quality evaluation index value and radiation dose evaluation index value of the candidate scan parameter combination; The comprehensive performance of candidate scanning parameter combinations is evaluated based on image quality evaluation index values, radiation dose evaluation index values, diagnostic thresholds of image quality evaluation indexes, diagnostic thresholds of radiation dose evaluation indexes, weights of image quality evaluation indexes, and weights of radiation dose evaluation indexes. For each combination of scanning task type and patient characteristics, select the scanning parameter combination with the best overall performance and add it to the preset scanning parameter combination library.

[0038] Among them, setting the diagnostic thresholds for image quality evaluation indicators and radiation dose evaluation indicators refers to determining the minimum acceptable level or the maximum permissible level of image quality (such as signal-to-noise ratio, contrast, spatial resolution, etc.) and radiation dose (such as effective dose, organ dose, etc.) based on a large amount of historical scanning data and clinical diagnostic standards.

[0039] Determining the weights of image quality evaluation indicators and radiation dose evaluation indicators refers to quantifying the relative importance of image quality and radiation dose under different scanning tasks and patient characteristics based on historical scanning data and clinical diagnostic criteria.

[0040] Obtaining multiple candidate scanning parameter combinations refers to generating a series of potential CT and SPECT scanning parameter configurations for specific scanning task types (e.g., cardiac scans, brain scans, whole-body bone scans, etc.) and patient characteristics (e.g., age, weight, gender, lesion location, etc.). This can be achieved using parameter grid search, random sampling, or model-based generation methods. For example, for a cardiac SPECT / CT scan of a 70kg adult patient, different combinations of CT tube voltage (e.g., 80kV, 100kV, 120kV), tube current (e.g., 50mA, 80mA, 120mA), exposure time (e.g., 0.5s, 1s, 1.5s), SPECT acquisition time (e.g., 15s / frame, 20s / frame, 25s / frame), and rotation angle (e.g., 180 degrees, 360 degrees) can be generated. These candidate combinations aim to cover a variety of possible scanning strategies, providing rich options for subsequent performance evaluation.

[0041] The calculation of image quality and radiation dose evaluation indices for candidate scanning parameter combinations refers to quantifying the performance of each generated candidate scanning parameter combination in terms of image quality and radiation dose through simulation, experimentation, or analysis of actual scanning data. This can be achieved through Monte Carlo simulation, phantom experiments, or retrospective clinical data analysis. For example, simulation software can be used to simulate the signal-to-noise ratio and effective dose of CT images under different parameter combinations, or actual scans can be performed on a phantom to measure image quality indices and dosimeter readings.

[0042] Specifically, this solution aims to address how to systematically construct and optimize a pre-defined library of scanning parameter combinations to ensure the optimal balance between image quality and radiation dose in SPECT / CT imaging. In SPECT / CT imaging systems, patients receive an injection of a radioactive tracer, followed by CT anatomical imaging and SPECT functional metabolic imaging. Due to individual patient differences and the diversity of scanning tasks, it is difficult to achieve a good balance between image quality and radiation dose using uniform scanning dose and image acquisition parameters. Currently, operators typically set parameters manually based on experience, which is highly subjective and prone to leading to substandard image quality or excessive radiation dose. This problem is particularly prominent in scanning radiation-sensitive populations such as children and pregnant women, requiring dose reduction as much as possible while ensuring diagnostic image quality. However, directly reducing the dose may lead to a decrease in the signal-to-noise ratio and an increase in artifacts in CT images, thereby affecting the attenuation correction effect of SPECT images and ultimately reducing the quality of fused images. In tasks with high image quality requirements, such as tumor localization and cardiac function assessment, substandard image quality may lead to misdiagnosis or missed diagnosis. In existing technologies, dosage strategies based on body weight or thickness ignore individual anatomical differences, failing to achieve precise matching between dosage and image quality. This solution addresses these issues by systematically constructing and optimizing a pre-defined library of scanning parameter combinations. First, by setting diagnostic thresholds for image quality and radiation dose, objective standards are provided for evaluation, avoiding the limitations of subjective experience. Next, by determining the weights of image quality and radiation dose, the system can be personalized for different clinical needs, solving the "one-size-fits-all" problem. Then, by acquiring multiple candidate scanning parameter combinations, the comprehensiveness and diversity of the solutions are ensured, enabling the system to handle complex clinical situations. Quantitative evaluation is achieved by calculating the image quality and radiation dose evaluation index values ​​for each candidate combination. Based on this, a comprehensive evaluation of the performance of candidate combinations avoids the limitations of single-index evaluation, ensuring a balance between image quality and radiation dose. Finally, by selecting the optimal combination and adding it to the parameter library, the system can intelligently choose the best solution, significantly improving the intelligence and personalization of SPECT / CT imaging. This effectively solves the problems of substandard image quality or excessive radiation dose in existing technologies, especially in special populations and demanding tasks.

[0043] In some implementations, the step of evaluating the overall performance of candidate scanning parameter combinations based on image quality evaluation index values, radiation dose evaluation index values, diagnostic thresholds for image quality evaluation indexes, diagnostic thresholds for radiation dose evaluation indexes, weights of image quality evaluation indexes, and weights of radiation dose evaluation indexes includes: The image quality evaluation index value of the candidate scanning parameter combination is compared with the diagnostic threshold of the image quality evaluation index, and the radiation dose evaluation index value of the candidate scanning parameter combination is compared with the diagnostic threshold of the radiation dose evaluation index to obtain the comparison results. Based on the comparison results, determine whether the candidate scanning parameter combinations meet the diagnostic requirements, and obtain the judgment result; The image quality evaluation index value is obtained by multiplying the image quality evaluation index value by the weight of the image quality evaluation index value, and the radiation dose evaluation index value is obtained by multiplying the radiation dose evaluation index value by the weight of the radiation dose evaluation index value. The weighted image quality evaluation index value and the weighted radiation dose evaluation index value are summed to obtain the comprehensive score; The judgment result and the overall score are used as the overall performance.

[0044] Specifically, when constructing a pre-defined library of scanning parameter combinations, it is first necessary to set diagnostic thresholds for image quality evaluation indicators and radiation dose evaluation indicators based on a large amount of historical scanning data and authoritative clinical diagnostic standards. Historical scanning data can include actual scan results for different patients and different scanning task types, as well as corresponding image quality assessment reports and radiation dose records. Clinical diagnostic standards are determined by medical experts or industry guidelines and are used to guide the acceptable range of image quality and radiation dose. Image quality evaluation indicators can include signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), spatial resolution, image uniformity, etc., and their diagnostic thresholds refer to the minimum acceptable image quality level set to meet specific diagnostic needs. Radiation dose evaluation indicators can include effective dose, organ dose, etc., and their diagnostic thresholds refer to the maximum radiation dose a patient can tolerate while ensuring diagnostic information.

[0045] Furthermore, based on historical scan data and clinical diagnostic criteria, it is necessary to determine the weights of image quality evaluation indicators and radiation dose evaluation indicators. These weights reflect the importance or priority of image quality and radiation dose when comprehensively evaluating the combination of scan parameters. For example, in some diagnostic tasks requiring extremely high image detail, the weight of image quality may be set higher; while in scans of radiation-sensitive patient groups (such as children), the weight of radiation dose may be set higher. These weights can be learned from historical data through expert experience, clinical feedback, or machine learning algorithms.

[0046] Subsequently, a series of candidate scan parameter combinations are obtained. These candidate combinations can cover various possible configurations of the CT and SPECT modules within their respective scan parameter ranges. For each candidate scan parameter combination, its corresponding image quality evaluation index and radiation dose evaluation index need to be calculated. These values ​​can be obtained through simulation, phantom experiments, or analysis of historical scan data. For example, image quality evaluation index values ​​can be obtained by performing scans on a standard phantom and measuring image characteristics, while radiation dose evaluation index values ​​can be obtained through dosimeter or Monte Carlo simulations.

[0047] Based on this, the overall performance of candidate scanning parameter combinations is evaluated. This evaluation process is based on the obtained image quality evaluation index values, radiation dose evaluation index values, and pre-set diagnostic thresholds for the image quality evaluation index and radiation dose evaluation index, as well as the weights of the image quality evaluation index and radiation dose evaluation index. By comparing the actual performance of the candidate combination with the diagnostic thresholds, it can be determined whether the combination meets the basic diagnostic requirements. Simultaneously, by summing the weighted image quality evaluation index values ​​and the weighted radiation dose evaluation index values, a comprehensive score is obtained, which quantifies the overall merits of the combination while meeting the diagnostic requirements.

[0048] Finally, the scanning parameter combination with the best overall performance is selected from all candidate combinations and used as the preset scanning parameter combination library. "Best overall performance" means that this scanning parameter combination not only meets all the set diagnostic requirements (i.e., image quality and radiation dose are both within acceptable ranges), but also has the highest overall score among all combinations that meet the diagnostic requirements. This means that this combination minimizes radiation dose while ensuring diagnostic accuracy, or maximizes image quality while keeping radiation dose under control.

[0049] This application's solution, by setting clear diagnostic thresholds, ensures that all selected scanning parameter combinations meet basic clinical diagnostic requirements, avoiding situations where image quality is sacrificed for low doses, or excessive radiation doses are incurred for high image quality. Simultaneously, by introducing a weighting mechanism and comprehensive scoring, it allows for flexible prioritization of image quality and radiation dose based on actual needs (such as patient characteristics and scanning task type), while meeting basic requirements, thereby selecting the truly optimal combination.

[0050] The above technical solution ensures that the generated preset scanning parameter combinations are rigorously screened and optimized, resulting in higher reliability and clinical applicability. This not only improves the adaptability of the SPECT / CT imaging system to different scanning tasks and patient conditions but also significantly enhances the automation and intelligence of the scanning process, reducing the complexity and potential errors of manual parameter adjustments by operators. Consequently, it achieves the goal of minimizing patient radiation dose while ensuring diagnostic image quality, thereby improving medical safety and optimizing clinical workflows.

[0051] In some preferred embodiments, a specific example is given below. Suppose a pre-defined library of scanning parameter combinations needs to be built for cardiac perfusion imaging. First, based on a large amount of historical cardiac perfusion scanning data and cardiology clinical diagnostic criteria, the diagnostic threshold for image quality evaluation indicators (e.g., signal-to-noise ratio (SNR) in the myocardial region) is set to be no less than 10, and the diagnostic threshold for radiation dose evaluation indicators (e.g., effective dose) is set to be no more than 10 mSv. Simultaneously, considering the high image quality requirements of cardiac perfusion imaging, the weight of the image quality evaluation indicator is set to 0.7, and the weight of the radiation dose evaluation indicator is set to 0.3. Next, a series of candidate scanning parameter combinations are generated, for example, the tube voltage (kVp) of the CT module ranges from 80 kV to 120 kV, and the tube current-time product (mAs) ranges from 50 mAs to 200 mAs; the acquisition time of the SPECT module ranges from 15 seconds / frame to 30 seconds / frame, and the number of projection angles ranges from 60 to 120. For each candidate combination, the corresponding SNR and effective dose values ​​are calculated by performing simulated scans on a cardiac phantom or analyzing historical data. For example, candidate combination A has an SNR of 12 and an effective dose of 8 mSv; another candidate combination B has an SNR of 9 and an effective dose of 6 mSv. When evaluating the overall performance, combination A's SNR (12) is higher than the diagnostic threshold (10), and its effective dose (8 mSv) is lower than the diagnostic threshold (10 mSv), thus meeting the diagnostic requirements. The overall score of combination A is 12 * 0.7 + 8 * 0.3 = 8.4 + 2.4 = 10.8. However, combination B's SNR (9) is lower than the diagnostic threshold (10), failing to meet the diagnostic requirements, and therefore is not considered the optimal combination. By performing similar calculations and comparisons on all candidate combinations that meet the diagnostic requirements, the combination with the highest overall score is finally selected as the preset scan parameter combination library.

[0052] In some implementations, the step of obtaining candidate scan parameter combinations includes: Set the scanning parameter range and scanning parameter step size for the CT module; Set the scan parameter range and scan parameter step size for the SPECT module; Based on the scanning parameter range and scanning parameter step size of the CT module, sample within the scanning parameter range of the CT module to obtain candidate scanning parameters of the CT module; Based on the scanning parameter range and scanning parameter step size of the SPECT module, samples are taken within the scanning parameter range of the SPECT module to obtain the candidate scanning parameters of the SPECT module; The candidate scan parameters from the CT module and the SPECT module are combined to generate a candidate scan parameter combination.

[0053] Specifically, the scanning parameter range of a CT module can be understood as the value range of various parameters that the CT module may use during the actual scanning process, such as the minimum and maximum values ​​of parameters like tube voltage, tube current, scanning time, and pitch. The scanning parameter step size of a CT module refers to the increment or interval of each parameter when sampling within the above parameter range. For example, if the tube voltage can range from 80kV to 140kV, and the step size is 10kV, then the candidate values ​​include 80kV, 90kV, ..., 140kV. Similarly, the scanning parameter range of a SPECT module refers to the value range of various parameters of the SPECT module (such as acquisition time, number of detectors, rotation angle, etc.), while the scanning parameter step size of the SPECT module is the sampling increment of these parameters.

[0054] Specifically, sampling within the CT module's scanning parameter range and step size to obtain candidate scanning parameters means generating a series of discrete parameter values ​​within the allowable range of each scanning parameter of the CT module, according to a set step size, using a preset sampling strategy. These parameter values ​​constitute the candidate scanning parameter set of the CT module. Similarly, sampling within the SPECT module's scanning parameter range and step size to obtain candidate scanning parameters means generating the SPECT module's candidate scanning parameter set in a similar manner.

[0055] Furthermore, combining candidate scan parameters from the CT module and the SPECT module to generate candidate scan parameter combinations involves pairing each candidate scan parameter from the CT module with each candidate scan parameter from the SPECT module to form a complete SPECT / CT scan parameter combination. For example, if the CT module has M candidate parameters and the SPECT module has N candidate parameters, then M*N candidate scan parameter combinations can be generated. These combinations form the basis for subsequent evaluations.

[0056] The proposed solution, by setting the scanning parameter ranges and step sizes for both the CT and SPECT modules and then performing systematic sampling, comprehensively and systematically generates a large number of candidate scanning parameter combinations. This method ensures that when constructing a pre-defined library of scanning parameter combinations, all possible configurations of the CT and SPECT module parameters can be fully explored, thus providing a broad and representative set of parameters for subsequent comprehensive performance evaluation. This avoids overlooking optimal or suboptimal scanning schemes due to inappropriate parameter selection, laying a solid foundation for achieving the goal of meeting diagnostic image quality requirements while minimizing radiation dose.

[0057] The above technical solution enables the generation of candidate scanning parameter combinations in a structured and systematic manner, ensuring sufficient coverage of the parameter space and thus increasing the likelihood of finding the optimal scanning parameter combination. This method makes the construction of the pre-set scanning parameter combination library more scientific and efficient, helping to more accurately identify optimization schemes that effectively balance scanning dose and image quality under different scanning task types and patient characteristics in subsequent evaluations.

[0058] In some implementations, each scan parameter combination in the preset scan parameter combination library has corresponding applicable conditions, including task type restrictions and patient characteristic restrictions. The steps for selecting a scan parameter combination from a pre-set scan parameter combination library based on scan task type information and patient characteristic information include: Based on the preset matching rules, the scanning task type information is compared with the task type limit, and the patient feature information is compared with the patient feature limit to obtain the comparison result; Based on the comparison results, scan parameter combinations that meet the applicable conditions are identified from the preset scan parameter combination library; From the identified combinations of scanning parameters, select the combination that has the highest matching degree with the scanning task type information and patient characteristic information.

[0059] Specifically, "applicability conditions" refer to the set of conditions set for each preset scan parameter combination library to indicate its applicable scope. These conditions are designed to ensure that the selected scan parameter combination is highly compatible with the current scanning task and the patient's physiological characteristics. "Task type limitations" may include, but are not limited to, specific imaging purposes (e.g., cardiac perfusion imaging, bone scan, cerebral blood flow imaging, etc.), target organs, or specific diagnostic needs. "Patient characteristic limitations" may include, but are not limited to, the patient's age range (e.g., children, adults, elderly), weight range, height range, body mass index (BMI), gender, and the presence of specific diseases or physiological conditions (e.g., renal insufficiency, history of heart disease, etc.). These limitations together constitute a multi-dimensional screening criterion to guide the precise selection of scan parameter combinations.

[0060] The "preset matching rules" can be understood as a set of algorithms or logic used to evaluate the similarity or conformity between scan task type information and task type constraints, and between patient characteristic information and patient characteristic constraints. For example, matching rules may include exact matching, range matching, fuzzy matching, or weight-based matching. In exact matching, the input information must be completely consistent with the constraints; in range matching, the input information must fall within the numerical range defined by the constraints; in fuzzy matching, a certain degree of deviation is allowed; and weight-based matching can assign different levels of importance to different constraints to calculate a comprehensive matching score. The "comparison result" is the output obtained after comparing the input information and constraints according to these matching rules, indicating the degree of conformity between each preset scan parameter combination and the current scan task and patient characteristics.

[0061] In practical applications, "identifying scanning parameter combinations that meet the applicable conditions" means, based on the comparison results, selecting those scanning parameter combinations whose applicable conditions match the current scanning task type information and patient characteristic information. For example, if the comparison results show that all the constraints of a certain scanning parameter combination are met, or that a preset minimum compliance threshold is met, then the combination is considered to meet the applicable conditions. "Selecting the scanning parameter combination with the highest matching degree with the scanning task type information and patient characteristic information" means, among all scanning parameter combinations that meet the applicable conditions, further evaluating their matching degree with the current input information, and selecting the one with the highest matching degree. The matching degree can be quantified by calculating a comprehensive score, which can be a weighted sum based on the matching degree of each constraint and its weight.

[0062] The solution proposed in this application configures detailed applicable conditions for each preset library of scanning parameter combinations and introduces a refined matching and selection mechanism. This enables the system to identify the scanning parameter combination that best suits the current clinical scenario from numerous preset combinations based on real-time scanning task type information and patient characteristic information. This avoids the inaccuracies that may result from universal selection and ensures that the selected parameter combination can maximize the balance between radiation dose and image quality, thereby providing patients with a personalized and optimal scanning plan.

[0063] The aforementioned technical solution significantly improves the accuracy and relevance of scanning parameter selection. This not only helps minimize radiation dose while ensuring diagnostic image quality, thus enhancing patient safety, but also optimizes imaging results, providing clinicians with more diagnostically valuable images. Furthermore, this solution reduces the complexity of manual parameter adjustments, improves work efficiency, and lowers the risk of inappropriate parameter selection due to human error.

[0064] As a specific implementation method, a concrete example is given below. Suppose a cardiac SPECT / CT scan needs to be performed on a child patient weighing 25 kg. First, the system obtains the scan task type information as "pediatric cardiac SPECT / CT" and the patient characteristic information as "weight 25 kg, age 8 years". Next, it traverses a preset scan parameter combination library. For example, scan parameter combination A in one preset scan parameter combination library may be defined as "task type: cardiac SPECT / CT, patient characteristics: adult, weight 60-80 kg", while scan parameter combination B in another preset scan parameter combination library may be defined as "task type: cardiac SPECT / CT, patient characteristics: child, weight 20-30 kg". According to preset matching rules, the scan task type information "pediatric cardiac SPECT / CT" is compared with the task type definition, and the patient characteristic information "weight 25 kg, age 8 years" is compared with the patient characteristic definition. The comparison results show that combination A does not meet the patient characteristic definition, while combination B fully meets both the task type definition and the patient characteristic definition. Therefore, the system identifies combination B as a suitable combination of scanning parameters. If multiple suitable combinations exist, the system will further calculate their matching degree and select the combination with the highest matching degree. Finally, the system will select the scanning parameters of the CT module and the SPECT module included in combination B and configure them into the corresponding modules to perform a cardiac SPECT / CT scan for the pediatric patient.

[0065] In some implementations, step A1 includes: The system receives scan task type information input by the operator through the user interface. The system receives patient characteristic information input by the operator through a user interface.

[0066] The user interface (GUI) can be understood as a medium for human-computer interaction, designed to provide an intuitive and easy-to-use platform for operators to conveniently input the required information. This GUI can be a graphical user interface (GUI), such as a touchscreen or monitor displayed on the SPECT / CT imaging system console, or input devices like buttons and knobs on a physical control panel. Operators typically refer to medical technicians or clinicians responsible for performing SPECT / CT scans. Scan task type information refers to the specific task classification related to the purpose of the SPECT / CT scan, such as cardiac perfusion scan, bone imaging, or functional brain imaging. Patient characteristic information covers physiological and pathological data related to the individual patient, such as age, weight, sex, height, past medical history, allergies, and specific diagnostic needs. Receiving operator input means that the system captures and processes data submitted by the operator via keyboard, mouse, touchscreen, or other input devices through the user interface.

[0067] Through the above technical solution, this application can effectively improve the accuracy and flexibility of acquiring scanning task type information and patient characteristic information. Direct input from the operator ensures the real-time nature and relevance of the information, helping the system to more accurately match scanning parameter combinations, thereby optimizing image quality and minimizing radiation dose.

[0068] In some implementations, step A3 includes: Configure the scan parameters of the CT module in the selected scan parameter combination to the CT module; Configure the scan parameters of the SPECT module in the selected scan parameter combination to the SPECT module; Start the SPECT / CT scan sequence so that the CT module and SPECT module can acquire data according to their respective configured scan parameters.

[0069] Specifically, configuring the CT module's scanning parameters in the selected scanning parameter combination refers to transmitting the various scanning parameters of the CT module determined in step A2 based on the scanning task type information and patient characteristic information, such as tube voltage, tube current, exposure time, scanning field of view, and pitch, to the CT module's control unit via the system control interface. This preset parameter setting is used for subsequent CT data acquisition. The purpose is to ensure that the CT module strictly adheres to the pre-optimized dose-image quality balance strategy during the scanning process.

[0070] The above-mentioned configuration of the SPECT module's scanning parameters from the selected scanning parameter combination can be understood as transmitting the various scanning parameters of the SPECT module determined in step A2, such as the acquisition time for each projection, the number of projections, the detector trajectory, and the distance between the detector and the patient, to the SPECT module's control system via the corresponding communication protocol, thereby preparing for SPECT data acquisition. The purpose is to enable the SPECT module to operate according to predetermined parameters aimed at optimizing image quality and minimizing radiation dose.

[0071] In practical applications, initiating the SPECT / CT scan sequence refers to the process where the system's main controller issues a command to synchronously or asynchronously start the data acquisition process of the CT and SPECT modules. This sequence ensures that the two modules can work collaboratively, acquiring data according to their respective configured scanning parameters. Its purpose is to automate and precisely control the integrated SPECT / CT scanning process.

[0072] The solution in this application precisely configures the scanning parameters of the CT module and the SPECT module in the pre-selected scanning parameter combination to the corresponding CT and SPECT modules, respectively, and then starts the SPECT / CT scan sequence. This ensures that the CT and SPECT modules operate strictly according to the optimized and balanced parameters during the actual data acquisition process. This avoids errors that may be introduced by manual settings and guarantees that image quality and radiation dose remain in the expected balance throughout the entire SPECT / CT scan, thus effectively performing the task of performing the SPECT / CT scan according to the selected scanning parameter combination in step A3.

[0073] Through the above technical solution, this application ensures that the selected combination of scanning parameters is accurately applied during the SPECT / CT scanning process, thereby improving the accuracy and reliability of scanning parameter execution. This not only helps maintain the expected image quality and radiation dose balance, but also simplifies the operator's work and reduces operational complexity through automated configuration and startup processes, further improving the overall operating efficiency of the SPECT / CT imaging system and the consistency of scan results.

[0074] Secondly, please refer to Figure 2 This application also provides a scanning dose and image quality balance control device, comprising: The acquisition module 21 is used to acquire scanning task type information and patient characteristic information; The processing module 22 is used to select a scanning parameter combination from a preset scanning parameter combination library based on scanning task type information and patient characteristic information. The scanning parameter combination includes scanning parameters of the CT module and scanning parameters of the SPECT module. The preset scanning parameter combination library is constructed and optimized based on historical scanning data and clinical diagnostic standards to ensure that the image quality meets the diagnostic requirements and minimizes the radiation dose. Execution module 23 is used to perform SPECT / CT scans based on the selected combination of scanning parameters.

[0075] This device collects scan task type information and patient characteristic information through the acquisition module 21. Based on this information, the processing module 22 selects an optimal combination from a preset scan parameter combination library. Finally, the execution module 23 performs a SPECT / CT scan according to the selected scan parameter combination. Therefore, this device effectively solves the problems of substandard image quality or excessive radiation dose caused by traditional manual parameter settings, achieving a balance between scan dose and image quality, and improving diagnostic accuracy and safety.

[0076] The scanning dose and image quality balance control device provided in this embodiment is used to perform the steps in the scanning dose and image quality balance control method provided in the first aspect above. The principle of the scanning dose and image quality balance control device provided in this embodiment is the same as that of the scanning dose and image quality balance control method provided in the first aspect above, and will not be discussed in detail here.

[0077] Please refer to Figure 3 , Figure 3 This application provides a schematic diagram of the structure of an electronic device 13, comprising a processor 1301 and a memory 1302. The processor 1301 and the memory 1302 are interconnected and communicate with each other via a communication bus 1303 and / or other forms of connection mechanism (not shown). The memory 1302 stores computer-readable instructions executable by the processor 1301. When the electronic device is running, the processor 1301 executes the computer-readable instructions to perform the method in any optional implementation of the above embodiments, thereby achieving the following functions: acquiring scan task type information and patient characteristic information; selecting a scan parameter combination from a preset scan parameter combination library based on the scan task type information and patient characteristic information, the scan parameter combination including scan parameters of the CT module and scan parameters of the SPECT module, and the preset scan parameter combination library is constructed and optimized based on historical scan data and clinical diagnostic standards to ensure that the image quality meets diagnostic requirements and minimizes radiation dose; and performing SPECT / CT scanning according to the selected scan parameter combination.

[0078] This application provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it performs the method in any optional implementation of the above embodiments to achieve the following functions: acquiring scan task type information and patient characteristic information; selecting a scan parameter combination from a preset scan parameter combination library based on the scan task type information and patient characteristic information, the scan parameter combination including scan parameters of the CT module and scan parameters of the SPECT module, and the preset scan parameter combination library is constructed and optimized based on historical scan data and clinical diagnostic standards to ensure that the image quality meets diagnostic requirements and minimizes radiation dose; and performing a SPECT / CT scan according to the selected scan parameter combination. The computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0079] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0080] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0081] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0082] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0083] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for balancing scanning dose and image quality, applied to a SPECT / CT imaging system, the SPECT / CT imaging system comprising a CT module and a SPECT module; characterized in that, The method for balancing scan dose and image quality includes the following steps: A1. Obtain scanning task type information and patient characteristic information; A2. Based on the scanning task type information and patient characteristic information, select a scanning parameter combination from the preset scanning parameter combination library. The scanning parameter combination includes the scanning parameters of the CT module and the scanning parameters of the SPECT module. The preset scanning parameter combination library is constructed and optimized based on historical scanning data and clinical diagnostic standards to ensure that the image quality meets the diagnostic requirements and minimizes the radiation dose. A3. Perform a SPECT / CT scan based on the selected combination of scanning parameters.

2. The scanning dose and image quality balance control method according to claim 1, characterized in that, The preset scan parameter combination library is obtained through the following steps: Based on historical scan data and clinical diagnostic criteria, diagnostic thresholds for image quality evaluation indicators and radiation dose evaluation indicators were set. Based on historical scan data and clinical diagnostic criteria, the weights of image quality evaluation indicators and radiation dose evaluation indicators were determined. For different scanning task types and patient characteristics, multiple candidate scanning parameter combinations can be obtained; For each candidate scan parameter combination, calculate the image quality evaluation index value and radiation dose evaluation index value of the candidate scan parameter combination; The comprehensive performance of candidate scanning parameter combinations is evaluated based on image quality evaluation index values, radiation dose evaluation index values, diagnostic thresholds of image quality evaluation indexes, diagnostic thresholds of radiation dose evaluation indexes, weights of image quality evaluation indexes, and weights of radiation dose evaluation indexes. For each combination of scanning task type and patient characteristics, the scanning parameter combination with the best overall performance is selected and added to the preset scanning parameter combination library.

3. The scanning dose and image quality balance control method according to claim 2, characterized in that, The steps for evaluating the comprehensive performance of candidate scanning parameter combinations based on image quality evaluation index values, radiation dose evaluation index values, diagnostic thresholds for image quality evaluation indexes, diagnostic thresholds for radiation dose evaluation indexes, weights of image quality evaluation indexes, and weights of radiation dose evaluation indexes include: The image quality evaluation index value of the candidate scanning parameter combination is compared with the diagnostic threshold of the image quality evaluation index, and the radiation dose evaluation index value of the candidate scanning parameter combination is compared with the diagnostic threshold of the radiation dose evaluation index to obtain the comparison results. Based on the comparison results, determine whether the candidate scanning parameter combinations meet the diagnostic requirements, and obtain the judgment result; The image quality evaluation index value is obtained by multiplying the image quality evaluation index value by the weight of the image quality evaluation index value, and the radiation dose evaluation index value is obtained by multiplying the radiation dose evaluation index value by the weight of the radiation dose evaluation index value. The weighted image quality evaluation index value and the weighted radiation dose evaluation index value are summed to obtain the comprehensive score; The judgment result and the overall score are used as the overall performance.

4. The scanning dose and image quality balance control method according to claim 2, characterized in that, The steps to obtain candidate scan parameter combinations include: Set the scanning parameter range and scanning parameter step size for the CT module; Set the scan parameter range and scan parameter step size for the SPECT module; Based on the scanning parameter range and scanning parameter step size of the CT module, sample within the scanning parameter range of the CT module to obtain candidate scanning parameters of the CT module; Based on the scanning parameter range and scanning parameter step size of the SPECT module, samples are taken within the scanning parameter range of the SPECT module to obtain the candidate scanning parameters of the SPECT module; The candidate scan parameters from the CT module and the SPECT module are combined to generate a candidate scan parameter combination.

5. The scanning dose and image quality balance control method according to claim 1, characterized in that, Each scan parameter combination in the preset scan parameter combination library has corresponding applicable conditions, including task type restrictions and patient characteristic restrictions. The steps for selecting a scan parameter combination from a pre-set scan parameter combination library based on scan task type information and patient characteristic information include: Based on the preset matching rules, the scanning task type information is compared with the task type limit, and the patient feature information is compared with the patient feature limit to obtain the comparison result; Based on the comparison results, scan parameter combinations that meet the applicable conditions are identified from the preset scan parameter combination library; From the identified combinations of scanning parameters, select the combination that has the highest matching degree with the scanning task type information and patient characteristic information.

6. The scanning dose and image quality balance control method according to claim 1, characterized in that, Step A1 includes: The system receives scan task type information input by the operator through the user interface. The user interface receives patient characteristic information input by the operator.

7. The scanning dose and image quality balance control method according to claim 1, characterized in that, Step A3 includes: Configure the scan parameters of the CT module in the selected scan parameter combination to the CT module; Configure the scan parameters of the SPECT module in the selected scan parameter combination to the SPECT module; Start the SPECT / CT scan sequence so that the CT module and SPECT module can acquire data according to their respective configured scan parameters.

8. A scanning dose and image quality balance control device, characterized in that, include: The acquisition module is used to acquire scanning task type information and patient characteristic information; The processing module is used to select a scanning parameter combination from a preset scanning parameter combination library based on scanning task type information and patient characteristic information. The scanning parameter combination includes scanning parameters from the CT module and scanning parameters from the SPECT module. The preset scanning parameter combination library is constructed and optimized based on historical scanning data and clinical diagnostic criteria to ensure that the image quality meets diagnostic requirements and minimizes radiation dose. The execution module is used to perform SPECT / CT scans based on the selected combination of scanning parameters.

9. An electronic device, characterized in that, It includes a processor and a memory, the memory storing computer-readable instructions, which, when executed by the processor, perform the steps of a scan dose and image quality balance control method as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it performs the steps in the scan dose and image quality balance control method as described in any one of claims 1-7.

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