A PET imaging system and imaging method based on double-detector rotation

Abstract

The application relates to the technical field of PET imaging, and relates to a PET imaging system based on double-detector rotation, which comprises a rotating table, two detector modules arranged on the two sides of the rotating table, a motor in driving connection with the rotating table and used for driving the rotating table to rotate, a controller in electric connection with the motor and used for controlling the rotation of the rotating table, and a measurement process, in which the controller controls the rotating table to rotate through the motor, so that the two detector modules can comprehensively collect data of all angles during scanning; through the combined design of the double-detector module and the rotating table, efficient data collection in the PET imaging process is realized; the rotating table can stably rotate under the driving of the motor, so that the two detector modules can comprehensively collect data of all angles during scanning; the combined design of the double-detector module and the rotating table not only reduces the hardware cost, but also simplifies the complexity of a signal processing circuit, and further reduces the system cost and maintenance difficulty.

Description

Technical Field

[0001] This invention relates to the field of PET imaging technology, and specifically to a PET imaging system and method based on dual-detector rotation. Background Technology

[0002] Positron emission tomography (PET), a key molecular imaging technology, plays a crucial role in medical diagnostics and scientific research. It is widely used in early diagnosis and staging of tumors, functional assessment of cardiovascular diseases, precise diagnosis of neurological diseases, and molecular tracing in new drug development. However, the design of traditional PET systems has, to some extent, limited its wider application.

[0003] Traditional PET systems mostly employ a full-ring detector design, with detectors arranged in a ring or polygonal pattern. While this design enables relatively comprehensive data acquisition, it has several drawbacks. First, the use of numerous detector modules leads to high system costs, and the complexity of the signal processing circuitry further increases these costs. Second, system maintenance and replacement costs are equally high, placing a significant financial burden on medical institutions. Furthermore, issues such as difficulty in ensuring detector consistency, long system dead time, and uneven sampling caused by detector gaps all affect the quality and accuracy of PET imaging.

[0004] Although some existing systems have attempted to adopt single-ring imaging in an effort to reduce system cost and complexity, they still cannot completely escape the constraints of traditional PET system design methods. While these systems have a relatively smaller number of detectors, they still require multiple detector modules, resulting in relatively high costs.

[0005] In summary, traditional PET systems, which employ a ring-shaped design with one or more detector modules, suffer from high system cost, high complexity, stringent detector consistency requirements, and significant system integration challenges. These issues not only limit the widespread adoption and application of PET equipment but also cause considerable inconvenience to medical institutions and researchers. Therefore, a novel PET imaging system is urgently needed to address these problems associated with traditional systems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a PET imaging system based on dual-detector rotation, aiming to solve the problems of multiple detector modules, high system complexity, and high cost in existing technologies.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A PET imaging system based on dual detector rotation includes: a rotating stage, two detector modules arranged on both sides of the rotating stage, a motor connected to the rotating stage drive for driving the rotating stage to rotate, and a controller electrically connected to the motor for controlling the rotation of the rotating stage. During measurement, the controller controls the rotation of the rotating stage through the motor so that the two detector modules can comprehensively acquire data from all angles during scanning.

[0009] Furthermore, the rotary table is coaxially connected to the motor output shaft, and the controller controls the rotation angle, speed, and time of the rotary table through the motor.

[0010] Furthermore, the two detector modules are positioned opposite each other, with an angle of 180 degrees between them.

[0011] Furthermore, the controller includes a microcontroller and a computer, with the motor electrically connected to the microcontroller and the microcontroller electrically connected to the computer.

[0012] A PET imaging method based on dual detector rotation is also provided, including the following steps:

[0013] S01: Start the computer, load the PET imaging software, and after the microcontroller receives the start command from the computer, initialize the status of the motor and the turntable.

[0014] S02: Set an appropriate rotation sampling strategy on the computer according to the scanning requirements;

[0015] S03: The computer sends a rotation command to the microcontroller, which controls the motor to start the rotary table, and the two detector modules begin to collect data during the rotation.

[0016] S04: The detector module transmits the acquired data to the computer for processing, and the computer generates PET images according to a preset algorithm.

[0017] Furthermore, the rotation sampling strategy includes continuous rotation sampling. In continuous rotation sampling mode, the turntable rotates at a fixed angular velocity, and the two detector modules collect data from all angles during the rotation process.

[0018] Furthermore, the rotation sampling strategy also includes adaptive rotation sampling. In adaptive rotation sampling mode, the controller automatically adjusts the rotation speed of the turntable according to the scanning time to ensure that data from all angles can be acquired during the scanning process.

[0019] Furthermore, the rotation sampling strategy also includes multi-angle combination sampling. In the multi-angle combination sampling mode, the controller presets multiple rotation angles, which can be selected as 60 degrees or 45 degrees. When collecting data, the controller controls the turntable to rotate according to the rotation angle. When it rotates to the target angle, it checks whether it needs to move to the next sampling position. If it needs to move, the motor is started to rotate. While rotating, it checks whether it has reached the target position. After reaching the target position, data collection begins.

[0020] The PET imaging system based on dual-detector rotation described in this invention offers the following advantages: By combining dual-detector modules with a rotating stage, highly efficient data acquisition is achieved during the PET imaging process. The rotating stage, driven by a motor, rotates smoothly, ensuring that both detector modules can comprehensively acquire data from all angles during scanning. This combination of dual-detector modules and the rotating stage not only reduces hardware costs but also simplifies the complexity of the signal processing circuitry, further lowering system costs and maintenance difficulty. The reduced number of detector modules also lowers the system integration complexity, making the system easier to install and debug. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a multi-angle rotation sampling method rotating 60 degrees according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of multi-angle rotation sampling rotated 40 degrees according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached diagram: 1. Motor; 2. Rotary stage; 3. Detector module. Detailed Implementation

[0026] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0027] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] To further illustrate the principles and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] like Figure 1-4 As shown, this embodiment of the invention provides a PET imaging system based on dual-detector rotation, including: a rotating stage 2, detector modules 3, a motor 1, and a controller. The rotating stage 2 is used to support the detector modules 3. The rotating stage 2 can be a cylindrical structure that can rotate around its own axis. The detector modules 3 are installed on both sides of the rotating stage 2. The motor 1 is driven by the rotating stage 2 and is used to provide power for the rotation of the rotating stage 2. The controller is electrically connected to the motor 1 and controls the rotation of the rotating stage 2 through the motor 1. During measurement, the rotation of the rotating stage 2 enables the two detector modules 3 to comprehensively acquire data from all angles during scanning.

[0030] Specifically, this system uses two detector modules 3 arranged opposite to each other, which are installed on both sides of the rotating stage 2, with an angle of 180 degrees between them.

[0031] Furthermore, the aforementioned rotary stage 2 is coaxially connected to the output shaft of motor 1. During PET imaging, it is necessary to ensure that the detector module 3 can accurately align with and scan the target area. When the rotary stage 2 is coaxially connected to the output shaft of motor 1, the vibration and sway caused by different axes can be minimized, thereby improving the stability and accuracy of rotation, and thus improving the clarity and accuracy of imaging.

[0032] Furthermore, the aforementioned controller can control the rotation angle, speed, and time of the rotary table 2. The controller consists of two parts: a microcontroller and a computer. The microcontroller is electrically connected to the motor 1 and is responsible for receiving instructions from the computer and controlling the rotation of the motor 1. The computer serves as the user interface, used to set the rotation sampling strategy, monitor the rotation status, and process the collected data.

[0033] This system provides a variety of rotation sampling strategies to adapt to different scanning requirements:

[0034] 1. Continuous Rotation Sampling: In this mode, the rotary table 2 rotates at a fixed angular velocity, and the two detector modules 3 continuously collect data during the rotation. This strategy is suitable for scenarios requiring comprehensive and continuous data acquisition.

[0035] 2. Adaptive Rotation Sampling: The rotation speed of the rotary stage 2 is automatically adjusted according to the scan time. For example, in the early stages of scanning, the rotation speed can be increased to cover more angles as quickly as possible; as the scan progresses, the rotation speed is gradually reduced to ensure that data from each angle is fully acquired. This strategy optimizes the scan time while ensuring the integrity of data acquisition.

[0036] 3. Multi-angle combined sampling: Multiple rotation angles are preset, such as 60 degrees, 45 degrees, etc. The rotating stage 2 rotates and stops according to the preset angles, so that the detector module 3 can collect data from specific angles more accurately. This strategy is suitable for scenarios with higher data acquisition requirements for specific areas or angles.

[0037] The following are the specific implementation steps of a PET imaging system based on dual-detector rotation:

[0038] 1. System initialization: Start the computer and load the PET imaging software; after receiving the start command from the computer, the microcontroller initializes the state of motor 1 and rotary table 2.

[0039] 2. Set rotation sampling strategy: According to the scanning requirements, set an appropriate rotation sampling strategy on the computer (such as continuous rotation sampling, adaptive rotation sampling, or multi-angle combination sampling).

[0040] 3. Start Scanning: The computer sends a rotation command to the microcontroller, which controls motor 1 to start the rotary table 2. The two detector modules 3 begin collecting data during the rotation.

[0041] 4. Data Acquisition and Processing: Detector module 3 transmits the acquired data to the computer for processing. The computer generates PET images according to a preset algorithm.

[0042] 5. Monitoring and Adjustment: During the scanning process, the computer monitors the status of the rotary table 2 and the data acquisition in real time. Adjustments to the rotation sampling strategy or termination of the scan can be made via the computer.

[0043] 6. End Scan: After all preset angle data has been collected and processed, the computer sends a stop command to the microcontroller, which then controls motor 1 to stop the rotary table 2. The scan is complete.

[0044] This invention also provides a PET imaging method based on dual-detector rotation, comprising the following steps:

[0045] S01: Start the computer, load the PET imaging software, and after the microcontroller receives the start command from the computer, initialize the state of motor 1 and rotary table 2.

[0046] S02: Based on the scanning requirements, set an appropriate rotation sampling strategy on the computer. The rotation sampling measurement can be selected from the continuous rotation sampling, adaptive rotation sampling, and multi-angle combination sampling mentioned above.

[0047] S03: The computer sends a rotation command to the microcontroller, which controls motor 1 to start the rotary table 2, and the two detector modules 3 begin to collect data during the rotation.

[0048] S04: Detector module 3 transmits the acquired data to the computer for processing, and the computer generates PET images according to a preset algorithm.

[0049] This system achieves efficient data acquisition during PET imaging by combining a dual detector module 3 with a rotating stage 2. Driven by motor 1, the rotating stage 2 rotates smoothly, ensuring that both detector modules 3 can comprehensively acquire data from all angles during scanning. This combination of dual detector modules 3 and rotating stage 2 not only reduces hardware costs but also simplifies the complexity of signal processing circuitry, further lowering system costs and maintenance difficulty. The reduced number of detector modules 3 also lowers the system integration difficulty, making the system easier to install and debug.

[0050] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A PET imaging system based on dual-detector rotation, characterized in that, include: The rotary table has two detector modules on each side. A motor connected to the rotary table drive is used to drive the rotary table to rotate. A controller connected to the motor is used to control the rotation of the rotary table. During measurement, the controller controls the rotation of the rotary table through the motor so that the two detector modules can fully collect data from all angles during the scanning process.

2. The PET imaging system based on dual-detector rotation according to claim 1, characterized in that, The rotary table is coaxially connected to the motor output shaft, and the controller controls the rotation angle, speed and time of the rotary table through the motor.

3. The PET imaging system based on dual-detector rotation according to claim 2, characterized in that, The two detector modules are positioned opposite each other, with an angle of 180 degrees between them.

4. The PET imaging system based on dual-detector rotation according to claim 3, characterized in that, The controller includes a microcontroller and a computer. The motor is electrically connected to the microcontroller, and the microcontroller is electrically connected to the computer.

5. A PET imaging method based on dual-detector rotation, applicable to the PET imaging system based on dual-detector rotation according to any one of claims 1-4, characterized in that, Includes the following steps: S01: Start the computer, load the PET imaging software, and after the microcontroller receives the start command from the computer, initialize the status of the motor and the turntable. S02: Set an appropriate rotation sampling strategy on the computer according to the scanning requirements; S03: The computer sends a rotation command to the microcontroller, which controls the motor to start the rotary table, and the two detector modules begin to collect data during the rotation. S04: The detector module transmits the acquired data to the computer for processing, and the computer generates PET images according to a preset algorithm.

6. The PET imaging method based on dual detector rotation according to claim 5, characterized in that, The rotation sampling strategy includes continuous rotation sampling. In continuous rotation sampling mode, the turntable rotates at a fixed angular velocity, and the two detector modules collect data from all angles during the rotation.

7. The PET imaging method based on dual-detector rotation according to claim 6, characterized in that, The rotation sampling strategy also includes adaptive rotation sampling. In adaptive rotation sampling mode, the controller automatically adjusts the rotation speed of the turntable according to the scanning time to ensure that data from all angles can be acquired during the scanning process.

8. The PET imaging method based on dual detector rotation according to claim 7, characterized in that, The rotation sampling strategy also includes multi-angle combination sampling. In the multi-angle combination sampling mode, the controller presets multiple rotation angles, which can be selected as 60 degrees or 45 degrees. When collecting data, the controller controls the turntable to rotate according to the rotation angle. When it rotates to the target angle, it checks whether it needs to move to the next sampling position. If it needs to move, the motor is started to rotate. While rotating, it checks whether it has reached the target position. After reaching the target position, data collection begins.

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