Medical scanning system, method and storage medium

Abstract

The present application relates to a medical scanning system, method and storage medium. The medical scanning system includes a CT scanning device, a radar device and a control device. The radar device is used to obtain a first respiratory signal of a subject to be tested that is within the scanning range of the CT scanning device; the control device is used to receive the first respiratory signal, and determine the current respiratory motion state of the subject to be tested based on the first respiratory signal, and control the CT scanning device to emit rays when the current respiratory motion state is a preset state. By using the radar device to realize real-time monitoring of the patient's respiratory motion during the entire examination process, the current respiratory motion state of the subject to be tested is judged by the first respiratory signal collected by the radar device, and when the current respiratory motion state is a preset state, CT data is collected and a CT image is obtained. CT scanning can be performed quickly and conveniently, solving the problem of cooperation between patients and technicians caused by traditional manual control of CT line laying.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to a medical scanning system, method and storage medium. Background Art

[0002] In the current PET (Positron Emission Tomography) / CT (Computed Tomography) scanning workflow, a CT scan is typically performed first to obtain a scout image, which is then used for subsequent PET image attenuation correction and registration fusion. However, due to the difference in scanning speed between CT and PET, the spatial position and phase of organs in the PET and CT images do not fully match, reducing the accuracy of the fused image. CT scanning typically involves training patients to hold their breath or take shallow breaths to reduce the impact of respiratory motion. Voice prompts are used to control breathing, and technicians manually control the timing of CT scan release.

[0003] During the implementation process, the respiratory training control method in traditional technology is more difficult to implement for seriously ill patients and patients who are difficult to cooperate. The image quality will be affected by human factors such as the technician's level. In addition, the need to set up additional related equipment further increases the cost and cumbersomeness of the scanning workflow. Summary of the Invention

[0004] Based on this, it is necessary to provide a medical scanning system, method and storage medium that can control the CT line-release moment to address the above technical problems, so as to avoid the influence of respiratory movement and human factors on image alignment, and further reduce detection costs and improve image quality.

[0005] To achieve the above objectives, in one aspect, an embodiment of the present invention provides a medical scanning system, comprising:

[0006] CT scanning equipment;

[0007] A radar device, configured to acquire a first respiratory signal of a subject within a scanning range of a CT scanner;

[0008] The control device is used to receive the first respiratory signal, determine the current respiratory motion state of the subject to be measured according to the first respiratory signal, and control the CT scanning device to emit rays in response to the current respiratory motion state being a preset state.

[0009] In one embodiment, a PET scanning device is further included, and the PET scanning device is coupled to one end of the CT scanning device. The radar device is also used to obtain a second respiratory signal of the object to be measured within the scanning range of the PET scanning device.

[0010] In one embodiment, the radar device is disposed at a coupling position between the PET scanning device and the CT scanning device.

[0011] In one embodiment, the radar device includes a radar board and a rotating connection structure for adjusting the orientation angle of the radar board; the radar board is disposed on an inner wall of the CT scanning device and / or the PET scanning device via the rotating connection structure.

[0012] In one embodiment, the device further includes a scanning bed that moves relative to the CT scanning device and / or the PET scanning device, and the control device is further used to adjust the rotation angle of the rotating connection structure according to the position of the scanning bed relative to the CT scanning device or the PET scanning device.

[0013] In one embodiment, the radar device includes a first radar device and a second radar device;

[0014] The first radar device is used to obtain a first respiratory signal of a subject to be measured within a scanning range of the CT scanning device;

[0015] The second radar device is used to acquire a second respiratory signal of the object to be measured within the scanning range of the PET scanning device.

[0016] In one aspect, an embodiment of the present invention further provides a medical scanning method, comprising the steps of:

[0017] receiving a first respiratory signal; wherein the first respiratory signal is obtained by scanning a subject to be measured within a scanning range of a CT scanning device using a radar device;

[0018] determining a current respiratory motion state of the subject to be measured according to the first respiratory signal;

[0019] In response to the current respiratory motion state being a preset state, the CT scanning device is controlled to emit rays.

[0020] In one embodiment, the steps are further included:

[0021] Acquire a CT image, which is reconstructed based on projection data generated after ray emission;

[0022] Acquiring PET data to obtain a first PET image;

[0023] The first PET image is registered with the CT image to generate a medical image of the object to be measured.

[0024] In one embodiment, the steps are further included:

[0025] Acquire a CT image, which is reconstructed based on projection data generated after ray emission;

[0026] Acquiring PET data to obtain a first PET image;

[0027] receiving a second respiratory signal; wherein the second respiratory signal is obtained by scanning the subject to be measured within the scanning range of the PET scanning device through a radar device;

[0028] performing respiratory artifact correction on the first PET image according to the second respiratory signal to obtain a second PET image;

[0029] The second PET image is registered with the CT image to generate a medical image of the object to be measured.

[0030] On the one hand, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above methods when the computer program is executed by a processor.

[0031] One of the above technical solutions has the following advantages and beneficial effects:

[0032] The above-mentioned medical scanning system uses radar equipment to monitor the patient's respiratory movements in real time throughout the examination process. The radar equipment collects a first respiratory signal to determine the subject's current respiratory state. If the current respiratory state is within a preset state, CT data is collected and a CT image is obtained. This enables fast and convenient CT scanning, avoiding the coordination difficulties between patients and technicians associated with traditional manual CT scans. Furthermore, the use of non-contact radar equipment to determine the current respiratory state effectively reduces costs, provides high monitoring accuracy, and is easy to use, allowing the patient to breathe freely throughout the entire scan process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of the preferred embodiments of the present application shown in the accompanying drawings. Like reference numerals indicate like parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual size, with the emphasis on illustrating the subject matter of the present application.

[0034] Figure 1 is a first schematic structural block diagram of a medical scanning system in one embodiment;

[0035] Figure 2 A schematic diagram of the orientation of a radar device when an object to be measured is within the scanning range of a CT scanner in one embodiment;

[0036] Figure 3 FIG1 is a schematic diagram of CT line release timing based on the first respiratory signal in one embodiment;

[0037] Figure 4is a second schematic structural block diagram of a medical scanning system in one embodiment;

[0038] Figure 5 A schematic diagram of the orientation of a radar device when an object to be measured is within the scanning range of a PET scanning device in one embodiment;

[0039] Figure 6 is a first schematic flow chart of a medical scanning method in one embodiment;

[0040] Figure 7 is a second schematic flow chart of a medical scanning method in one embodiment;

[0041] Figure 8 is a third schematic flow chart of a medical scanning method in one embodiment;

[0042] Figure 9 A schematic diagram of a workflow for medical scanning in one embodiment;

[0043] Figure 10 FIG. 4 is a structural block diagram of a medical scanning device in one embodiment. DETAILED DESCRIPTION

[0044] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0046] It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various signals, but these signals are not limited by these terms. These terms are only used to distinguish a first element from another element.

[0047] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intervening element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., if there is transmission of electrical signals or data between the connected objects.

[0048] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0049] Currently, in order to reduce respiratory artifacts, one technical approach is to train patients to hold their breath or take shallow breaths during CT scans to reduce the impact of respiratory movements. Voice prompts are used to control the patient's breathing, and the technician manually controls the CT line release time. However, the above-mentioned respiratory training control method is more difficult to implement for seriously ill patients and patients who are difficult to cooperate. At the same time, the image quality will be affected by human factors such as the technician's level.

[0050] Another technical approach involves incorporating respiratory gating technology into CT scanning. In this scanning mode, the patient breathes freely, and the CT image acquisition process covers multiple respiratory cycles. Respiratory signals are captured by external equipment (such as an optical camera). A specialized scanning program and processing algorithm divide the respiratory cycle into several time-phased images, which are then classified and organized. Based on this, the PET images are attenuated and fused. However, this technology significantly increases CT scanning time and the amount of image processing data, increasing the reconstruction hardware requirements and cost. Existing respiratory gating devices are generally divided into two categories: contact and non-contact. Contact gating devices include pressure sensors and real-time respiratory airflow tachometers, and typically require auxiliary devices such as straps and respiratory masks to achieve monitoring. However, the softness of human chest and abdominal tissue and the large individual differences among patients introduce uncertainty in the functionality of external auxiliary devices. Furthermore, these external auxiliary devices require additional time to install, increasing the technician's radiation exposure time and dose, and increasing patient discomfort. Non-contact gating technology primarily utilizes optical imaging principles, placing reflectors on the chest and abdomen of the human body and using optical cameras to collect chest and abdominal displacement information to identify respiratory movement. However, these optical cameras are typically fixed to one end of the scanning bed or hung on the ceiling above the bed, resulting in a limited monitoring range. Furthermore, an additional host computer is typically required for communication with them, making the transmission of respiratory signals to the PET / CT system more complex and increasing the complexity of the scanning workflow. Furthermore, third-party respiratory gating technology is also relatively expensive.

[0051] The medical scanning system provided in this application can effectively solve the above problems.

[0052] In one embodiment, Figure 1 As shown, a medical scanning system is provided, comprising:

[0053] CT scanning equipment;

[0054] A radar device, configured to acquire a first respiratory signal of a subject within a scanning range of a CT scanner;

[0055] The control device is used to receive the first respiratory signal, determine the current respiratory motion state of the subject to be measured according to the first respiratory signal, and control the CT scanning device to emit rays in response to the current respiratory motion state being a preset state.

[0056] The CT scanning device can be any type of CT scanning device in the art. The CT scanning device can be an orthogonal CT device, or a spiral CT or planar CT (PCT) type CT device. For example, in an orthogonal CT device, the rotation axis of the rotationally driven object (workpiece) is orthogonal to the irradiation axis (also called the "optical axis") connecting the center of the X-ray source (e.g., X-ray tube) and the X-ray detector. In a spiral CT, the rotation axis and the irradiation axis (optical axis) are not orthogonal, but intersect at an angle.

[0057] In one embodiment, the CT scanning device is a spiral CT, which includes a tube mounted on a gantry, a detector disposed within the gantry, and a scanning bed. When the gantry rotates, the scanning bed carrying the object to be measured moves linearly in a direction perpendicular to the gantry.

[0058] The scanning bed can move at variable speeds in a direction perpendicular to the gantry according to the first respiratory signal. In one embodiment, the control device controls the CT scanner to move at different speeds before and after the CT scanner emits radiation based on the current respiratory state of the subject. For example, when the subject is outside the scanning range of the CT scanner (moving from the CT scanner to the PET scanner, or from outside the CT scanner to the scanning range of the CT scanner), the CT scanner does not emit radiation and the scanning bed can move at a first speed. When the subject is within the scanning range of the CT scanner and the subject's respiratory state is not in a preset state, the CT scanner does not emit radiation and the scanning bed can remain stationary. In response to the subject's respiratory state being in a preset state, the CT scanner emits radiation and the scanning bed moves at a second speed, where the second speed is less than the first speed. In this embodiment of the present application, by controlling the scanning bed to move at variable speeds according to the first respiratory signal, moving at the first speed outside the scanning range of the CT scanner can shorten scanning time and improve the efficiency of the CT scanner. When the subject is within the scanning range of the CT scanner and the subject's respiratory state is in a preset state, the scanning bed moves at the lower second speed, thereby ensuring the accuracy of projection data acquisition and achieving fast and accurate spiral CT scanning.

[0059] In one embodiment, the second speed can be set according to the CT scanning protocol or the pitch of the CT spiral scan, and the movement speed of the scanning bed is equal in multiple preset states. In this embodiment of the present application, the corresponding scanning bed movement speed can be set according to the CT spiral pitch to achieve adaptive parameter setting of the CT scanning device.

[0060] In one embodiment, the CT or PET scanning protocol is controlled to ensure that the CT scanning range is larger than or equal to the PET scanning range in the direction of the table's movement, thereby ensuring that all PET scan data is attenuated and corrected based on the CT data. In the direction perpendicular to the table's movement, the CT scanning range may be smaller than the PET scanning range. Therefore, attenuation correction is not performed on the portion of the PET scan data that exceeds the CT scanning range. Because this portion is close to the body's periphery, its impact on clinical evaluation is negligible.

[0061] In some other embodiments, the ray emission source of the CT scanning device is dual-source or multi-source. For the dual-source or multi-source CT scanning device, the control mechanism of ray emission is the same as that of the single-source, both of which are triggered by the respiratory signal, and one or more ray sources in the dual or multi-source can be controlled to emit rays according to needs, that is: the control device determines the current respiratory movement state according to the first respiratory signal waveform, and then triggers one or more ray sources in the CT scanning device to emit rays.

[0062] The radar device can be any type of radar device in the art, for example, a millimeter wave radar. The radar detection method of respiratory movement can be: the radar emits millimeter waves along a specific angle, the millimeter waves reach the chest and abdomen of the human body and return, the radar board records the signal reflected back from the surface of the chest and abdomen of the human body, and extracts the periodic respiratory signal by comparing and screening the information. The type of control device is not limited and can be set according to the actual application situation. For example, it can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., as long as it can receive the first respiratory signal and determine the current respiratory movement state of the subject to be tested based on the first respiratory signal, and when the current respiratory movement state is a preset state, control the CT scanning device to emit rays.

[0063] Specifically, the radar device can be directly aimed at the scanning range of the CT scanning device. The object to be measured can be a person or other living things. Figure 2As shown, the radar device 10 obtains a first respiratory signal of the object to be measured. The radar device and the control device can be connected by wire or by wireless connection. The control device receives the first respiratory signal and determines the current respiratory motion state based on the first respiratory signal. When the current respiratory motion state is a preset state, the CT scanning device is controlled to collect CT data. Specifically, the control device can control the radiation source in the CT scanning device to emit radiation. For example, when the current respiratory motion state is a preset state, the control device transmits a trigger signal to the radiation source of the CT scanning device and starts CT scanning. Figure 3 Figure 1 is a schematic diagram of the CT scan time based on the first respiratory signal. It should be noted that the preset states can be the initial, mid-, and final respiratory stages, or they can be set time periods within the entire respiratory cycle. For example, if the set time period is the last 20% of the entire respiratory cycle, the CT scanner will perform scan time when the current respiratory motion state is within 80%-100% of the respiratory cycle.

[0064] Furthermore, the processing steps for obtaining a CT image based on the collected CT data can refer to any processing method in the art and are not described in detail here. It should be noted that if the duration of the end-respiratory phase is short and the quality of the resulting single CT image does not meet clinical requirements, the CT scanning device can be controlled to collect CT data for multiple respiratory cycles. CT images in a preset state during multiple respiratory cycles can be obtained and superimposed / fused to improve the accuracy of the CT image.

[0065] The above-mentioned medical scanning system uses radar equipment to monitor the patient's respiratory movements in real time throughout the examination. The radar device collects a first respiratory signal to determine the subject's current respiratory state. If the current respiratory state is within a preset state, CT data is collected and a CT image is obtained. This system enables fast and convenient CT scanning, avoiding the coordination challenges between patients and technicians associated with traditional manual CT scans. Furthermore, the use of non-contact radar equipment to determine the current respiratory state effectively reduces costs, provides high monitoring accuracy, and is easy to use, allowing the patient to breathe freely throughout the entire scan.

[0066] In one embodiment, the preset state is a terminal respiratory state.

[0067] The area near the peak and bottom values ​​of the respiratory signal waveform can be selected as the end-respiration stage, or the technician can manually select to determine the end-respiration state.

[0068] Specifically, in most existing clinical applications, respiratory status is not restricted. Due to differences in CT and PET scanning speeds, the spatial position and temporal phase of organs on PET and CT images do not fully match, reducing the accuracy of the fused image and introducing artifacts. In the case of the preset state of end-respiration, the position of internal organs in the human body is relatively normal and does not move upward due to inhalation. The CT images acquired at this time are easy to align with the PET images, which helps improve the image registration accuracy.

[0069] In one embodiment, Figure 4 As shown, a medical scanning system comprises:

[0070] CT scanning equipment;

[0071] A radar device, configured to acquire a first respiratory signal of a subject within a scanning range of a CT scanner;

[0072] The control device is used to receive the first respiratory signal, determine the current respiratory motion state of the subject to be measured according to the first respiratory signal, and control the CT scanning device to emit rays in response to the current respiratory motion state being a preset state.

[0073] It also includes a PET scanning device, which is coupled to one end of the CT scanning device. The radar device is also used to obtain a second respiratory signal of the object to be measured within the scanning range of the PET scanning device.

[0074] The PET scanning device may be any model of PET scanning device in the art, and may be placed adjacent to the CT scanning device so that the user can pass by the CT scanning device and the PET scanning device continuously, or may be set up independently.

[0075] Specifically, obtaining a first PET image based on the acquired PET data can adopt any method known in the art. In some embodiments, the PET data can be processed to generate a PET image. The PET data can be processed based on one or more algorithms, including, for example, a noise reduction algorithm, a reconstruction algorithm, a correction algorithm, and the like. In some embodiments, the reconstruction algorithm can include an iterative reconstruction algorithm (e.g., a maximum likelihood expectation maximization algorithm, an ordered subset expectation maximization algorithm), a filtered back projection algorithm, a 3D reconstruction algorithm, or a combination thereof. In some embodiments, the correction algorithm can include one or a combination thereof, including random correction, scatter correction, attenuation correction, dead time correction, and normalization correction.

[0076] Specifically, when the object to be measured is within the scanning range of the PET scanning device, Figure 5As shown, as the scanning bed moves from the CT scanner to the scanning range of the PET scanner, the radar device is used to acquire a first respiratory signal from the subject within the scanning range of the CT scanner, and a second respiratory signal from the subject within the scanning range of the PET scanner. In one specific example, there may be multiple radar devices, some of which are used to acquire the first respiratory signal, while others are used to acquire the second respiratory signal. In another specific example, the radar device can be steered based on the position of the scanning bed relative to the CT scanner or PET scanner. When acquiring the first respiratory signal, the radar device is oriented toward the scanning range of the CT scanner, and when acquiring the second respiratory signal, the radar device is oriented toward the scanning range of the PET scanner. For example, the radar device includes a radar panel and a rotatable connection structure for adjusting the orientation of the radar panel. The radar panel is mounted on the inner wall of the CT scanner and / or PET scanner via the rotatable connection structure. In one embodiment, the radar device is mounted at the coupling point between the PET scanner and the CT scanner.

[0077] In one embodiment, the medical scanning system further includes an image processing device, which is further configured to perform respiratory artifact correction on the first PET image based on the second respiratory signal to obtain a second PET image, and to perform image registration between the first PET image and the CT image to generate a medical image of the subject to be measured, or to perform image registration between the second PET image and the CT image to generate a medical scan image of the subject to be measured. Because the first PET image has not been corrected for respiratory artifacts, the registration error with the CT image is greater than that of the second PET image. Of course, during clinical use, technicians can flexibly choose whether to perform respiratory artifact correction on the PET image based on actual needs. Specifically, the radar detection signal includes a respiratory motion signal. The respiratory motion signal is divided into several motion phases according to the respiratory cycle, such as the inspiratory phase and the expiratory phase. The first PET image data corresponding to each phase, collected synchronously with the respiratory motion signal, is classified and analyzed, and the first PET image data in the same motion phase is registered and corrected. For example, the first PET data in the same motion phase of all respiratory cycles are binned and reconstructed to obtain the second PET image. This can significantly reduce respiratory artifacts in the images of each phase. Image registration is to determine the correspondence between PET images and CT images through registration experiments, and all subsequent clinical images are directly fused using this correspondence.

[0078] The above-mentioned medical scanning system can simultaneously improve the registration accuracy of CT and PET images. The integrated design of respiratory motion monitoring and image scanning can greatly improve data transmission efficiency and significantly optimize image reconstruction speed.

[0079] In one embodiment, the device further includes a scanning bed that moves relative to the CT scanning device and / or the PET scanning device, and the control device is further used to adjust the rotation angle of the rotating connection structure according to the position of the scanning bed relative to the CT scanning device or the PET scanning device.

[0080] Specifically, the scanning bed is used to carry the object to be measured. The control device adjusts the rotation angle of the rotating connection structure so that the radar board can obtain the first breathing signal or the second breathing signal of the object to be measured.

[0081] In one embodiment, the control device includes a CT acquisition circuit board, a PET acquisition circuit board, and a data processing device;

[0082] The CT acquisition circuit board is used to control the CT scanning device to acquire CT data when the current respiratory motion state is the end-respiratory phase; the PET acquisition circuit board is used to control the PET scanning device to acquire PET data throughout the entire respiratory cycle; and the data processing device is used to generate a fused image based on the PET data and the CT data. Furthermore, the data processing device includes a first processor, a second processor, and a third processor; the first processor is used to reconstruct and generate a CT image based on the CT data; the second processor is used to reconstruct and generate a first PET image based on the PET data; and the third processor is used to perform registration and fusion processing on the CT image and the first PET image to obtain a fused image. The second processor is also used to perform respiratory artifact correction processing on the first PET image based on the second respiratory signal to obtain a second PET image; and the third processor is used to perform registration and fusion processing on the CT image and the second PET image to obtain a fused image.

[0083] In one embodiment, the radar device includes a first radar device and a second radar device;

[0084] The first radar device is used to obtain a first respiratory signal of a subject to be measured within a scanning range of the CT scanning device;

[0085] The second radar device is used to acquire a second respiratory signal of the object to be measured within the scanning range of the PET scanning device.

[0086] Specifically, the first radar device and the second radar device can both be installed on the CT scanner, both on the PET scanner, or separately on the CT scanner and the PET scanner. It should be noted that the first radar device and the second radar device can also be installed in other locations, such as being installed separately or together in the scanning room or on the ceiling. As long as the first radar device can obtain the first respiratory signal of the subject under test within the scanning range of the CT scanner, and the second radar device can obtain the second respiratory signal of the subject under test within the scanning range of the PET scanner, it is sufficient.

[0087] In one embodiment, a radar device includes a radar board and a rotating connection structure for adjusting an orientation angle of the radar board;

[0088] The rotating connection structure is connected to the control device; when performing a CT scan, the control device controls the rotating connection structure to adjust the radar board toward the CT scanning area; when performing a PET scan, the control device controls the rotating connection structure to adjust the radar board toward the PET scanning area.

[0089] Specifically, the radar panel is arranged on the inner wall of the CT scanning device and / or the PET scanning device through a rotating connection structure.

[0090] In one embodiment, Figure 6 As shown, a medical scanning method is provided, comprising the steps of:

[0091] S610, receiving a first breathing signal; wherein the first breathing signal is obtained by scanning a subject within a scanning range of a CT scanner using a radar device;

[0092] S620, determining a current respiratory motion state of the subject to be measured according to the first respiratory signal;

[0093] Specifically, the radar device detects the chest fluctuations of the subject during breathing, and can obtain the following information: Figure 3 The respiratory signal shown. The current respiratory state of the subject can be determined based on the first respiratory signal waveform. Different respiratory time periods correspond to different waveform positions. For example, the area near the peak and bottom values ​​of the respiratory signal waveform can be selected as the end of respiratory state. The end of respiratory state can also be determined manually by the technician.

[0094] S630: In response to the current respiratory motion state being a preset state, control the CT scanning device to emit rays.

[0095] The preset state can be the initial respiratory stage, the mid-respiratory stage, or the final respiratory stage, or can be a set time period within the entire respiratory cycle. For example, if the set time period is the last 20% of the entire respiratory cycle, the CT scanner performs line placement when the current respiratory motion state is within 80%-100% of the respiratory cycle. The processing steps for obtaining a CT image based on the collected CT data can refer to any processing method in the art and are not described in detail here.

[0096] The above-mentioned medical scanning method uses radar equipment to collect a first respiratory signal to determine the subject's current respiratory state. If the current respiratory state is within a preset state, CT data is collected and a CT image is obtained. This method allows for quick and convenient CT scanning, avoiding the coordination challenges between patients and technicians associated with traditional manual CT scans. Furthermore, using radar equipment to determine the current respiratory state can effectively reduce costs.

[0097] In one embodiment, Figure 7 As shown, the steps include:

[0098] S640, acquiring a CT image, where the CT image is reconstructed based on projection data generated after the ray emission;

[0099] Specifically, a CT image can be obtained based on the principle of ray imaging, where the ray can be an X-ray.

[0100] S650, acquiring PET data to obtain a first PET image;

[0101] S660: Perform image registration on the first PET image and the CT image to generate a medical image of the object to be measured.

[0102] In one embodiment, Figure 8 As shown, the steps include:

[0103] S670, receiving a second respiratory signal; wherein the second respiratory signal is obtained by scanning the subject to be measured within the scanning range of the PET scanning device using a radar device;

[0104] S680, performing respiratory artifact correction on the first PET image according to the second respiratory signal to obtain a second PET image;

[0105] S690: Perform image registration on the second PET image and the CT image to generate a medical image of the object to be measured.

[0106] Specifically, the radar device can be used to obtain a first respiratory signal from a subject within the scanning range of a CT scanner, and a second respiratory signal from a subject within the scanning range of a PET scanner, respectively, based on the movement of the scanning bed. Respiratory artifact correction can be performed on the first PET image based on the second respiratory signal using any method known in the art to obtain a second PET image. Image registration of the second PET image with the CT image, and image registration of the first PET image with the CT image, can also be performed using commonly used techniques known in the art.

[0107] Considering that the CT scanning range may be smaller than the PET scanning range in the direction perpendicular to the scanning bed, and the CT image may be partially truncated, that is, the registration of the first PET image and the CT image is to register the CT image with a portion of the first PET image. The medical scanning method may further include:

[0108] First, based on the local registration results of the CT image and the first PET image, a partial truncation region of the object to be measured is determined. For example, a first registered image can be generated by partially registering the first PET image with the CT image. The first registered image and the first PET image are then silhouetted to determine the partial truncation region.

[0109] Next, the tissue type corresponding to the partially cut-off region is determined, which may be a fat region, a limb region, or the like.

[0110] Thirdly, according to the tissue type corresponding to the partially cut-off region, a CT value is assigned to the partially cut-off region to generate a simulated CT image. For example, the CT value can be assigned to the partially cut-off region based on prior knowledge.

[0111] Finally, the simulated CT image and the CT image are merged to generate a corrected CT image. This corrected CT image can be used for registration of the second PET image. In this embodiment of the present application, by restoring the partially truncated region of the CT image, the restored imaging region of the CT image remains consistent with the PET imaging region, thereby improving the accuracy of subsequent registration of the CT and PET images.

[0112] It should be understood that although Figure 6-8 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 6-8 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0113] In order to further illustrate the workflow of this application based on the medical scanning system, Figure 9 Provide further explanation.

[0114] The radar system (i.e., the radar device mentioned above) scans the patient to obtain a respiratory signal (the first respiratory signal mentioned above). The control circuit board guides the CT radiographic device to perform radiographic scanning based on the respiratory signal. The reconstruction PC (reconstruction computer) reconstructs the scan data obtained from the radiographic scanning to generate a CT image. The coincidence circuit board controls the PET scanning device to collect coincidence data with a respiratory phase (i.e., the PET data mentioned above), and generates a PET image from the coincidence data through the reconstruction PC (reconstruction computer). The PET image can be the first PET image mentioned above, or it can be a second PET image obtained by correcting the respiratory artifacts of the first PET image according to the second respiratory signal, or it can be an image obtained by attenuation correction of the first PET image or the second PET image based on the CT image. The host aligns the CT image and the PET image to obtain a PET / CT fusion image (i.e., the medical image of the object to be measured).

[0115] In one embodiment, Figure 10 As shown, a medical scanning device is provided, comprising:

[0116] a first respiratory signal acquisition module, configured to receive a first respiratory signal; wherein the first respiratory signal is obtained by scanning a subject within a scanning range of a CT scanner using a radar device;

[0117] a respiratory motion state determination module, configured to determine a current respiratory motion state of the subject to be measured according to the first respiratory signal;

[0118] The radiation emission module is used to control the CT scanning device to emit radiation in response to the current respiratory motion state being a preset state.

[0119] In one embodiment, the medical scanning device further comprises:

[0120] The image acquisition module is used to acquire a CT image, which is reconstructed based on the projection data generated after the ray emission; and is used to collect PET data to obtain a first PET image, perform image registration on the first PET image and the CT image, and generate a medical image of the object to be measured.

[0121] In one embodiment, the medical scanning device further comprises:

[0122] a correction module configured to receive a second respiratory signal obtained by scanning a subject within a scanning range of a PET scanner using a radar device; and to perform respiratory artifact correction on the first PET image based on the second respiratory signal to obtain a second PET image;

[0123] The fusion registration module is used to perform image registration on the second PET image and the CT image to generate a medical image of the object to be measured.

[0124] The specific definition of the medical scanning device can be found in the definition of the medical scanning method above and will not be repeated here. Each module in the aforementioned medical scanning device may be implemented in whole or in part via software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in the form of software in a memory in the computer device, allowing the processor to call and execute the corresponding operations of each module.

[0125] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0126] receiving a first respiratory signal; wherein the first respiratory signal is obtained by scanning a subject to be measured within a scanning range of a CT scanning device using a radar device;

[0127] determining a current respiratory motion state of the subject to be measured according to the first respiratory signal;

[0128] In response to the current respiratory motion state being a preset state, the CT scanning device is controlled to emit rays.

[0129] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0130] Acquire a CT image, which is reconstructed based on projection data generated after ray emission;

[0131] Acquiring PET data to obtain a first PET image;

[0132] The first PET image is registered with the CT image to generate a medical image of the object to be measured.

[0133] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0134] receiving a second respiratory signal; wherein the second respiratory signal is obtained by scanning the subject to be measured within the scanning range of the PET scanning device through a radar device;

[0135] performing respiratory artifact correction on the first PET image according to the second respiratory signal to obtain a second PET image;

[0136] The second PET image is registered with the CT image to generate a medical image of the object to be measured.

[0137] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus dynamic random access memory (Rambus DRAM, abbreviated as RDRAM), and interface dynamic random access memory (DRDRAM).

[0138] Throughout this specification, references to terms such as "some embodiments," "other embodiments," and "desired embodiments" indicate that a particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Although these terms are used interchangeably throughout this specification, they do not necessarily refer to the same embodiment or example.

[0139] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0140] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A medical scanning system, characterized in that: include: CT scanning equipment; A radar device, configured to acquire a first respiratory signal of a subject within a scanning range of the CT scanning device; a control device, configured to receive the first respiratory signal, determine a current respiratory motion state of the subject to be measured based on the first respiratory signal, and control the CT scanning device to emit radiation in response to the current respiratory motion state being a preset state; The CT scanning device includes a scanning bed; the scanning bed moves at a variable speed in a direction perpendicular to the frame according to a first respiratory signal; when the subject to be measured is outside the scanning range of the CT scanning device, the scanning bed moves at a first speed; when the subject to be measured is within the scanning range of the CT scanning device and the respiratory state is a preset state, the scanning bed moves at a second speed; the second speed is less than the first speed.

2. The medical scanning system according to claim 1, wherein: It also includes a PET scanning device, which is coupled to one end of the CT scanning device. The radar device is also used to obtain a second respiratory signal of the object to be measured within the scanning range of the PET scanning device.

3. The medical scanning system according to claim 2, wherein: The radar device is arranged at a coupling position between the PET scanning device and the CT scanning device.

4. The medical scanning system according to claim 2, wherein: The radar device includes a radar board and a rotating connection structure for adjusting the orientation angle of the radar board; the radar board is arranged on the inner wall of the CT scanning device and / or the PET scanning device through the rotating connection structure.

5. The medical scanning system according to claim 4, wherein: It also includes a scanning bed that moves relative to the CT scanning device and / or the PET scanning device, and the control device is further used to adjust the rotation angle of the rotating connection structure according to the position of the scanning bed relative to the CT scanning device or the PET scanning device.

6. The medical scanning system according to claim 2, wherein: The radar device includes a first radar device and a second radar device; The first radar device is used to obtain the first respiratory signal of the subject to be measured within the scanning range of the CT scanning device; The second radar device is used to acquire the second respiratory signal of the object to be measured within the scanning range of the PET scanning device.

7. A medical scanning method, characterized in that: Including steps: Receive a first respiratory signal; wherein the first respiratory signal is obtained by scanning a subject to be measured within a scanning range of a CT scanning device using a radar device; determining a current respiratory motion state of the subject to be measured according to the first respiratory signal; In response to the current respiratory motion state being a preset state, controlling the CT scanning device to emit radiation; The CT scanning device includes a scanning bed; the scanning bed moves at a variable speed in a direction perpendicular to the frame according to a first respiratory signal; when the subject to be measured is outside the scanning range of the CT scanning device, the scanning bed moves at a first speed; when the subject to be measured is within the scanning range of the CT scanning device and the respiratory state is a preset state, the scanning bed moves at a second speed; the second speed is less than the first speed.

8. The medical scanning method according to claim 7, characterized in that: Also includes the steps: Acquiring a CT image, where the CT image is reconstructed based on projection data generated after the ray emission; Acquiring PET data to obtain a first PET image; Perform image registration on the first PET image and the CT image to generate a medical image of the object to be measured.

9. The medical scanning method according to claim 7, wherein: Also includes the steps: Acquiring a CT image, where the CT image is reconstructed based on projection data generated after the ray emission; Acquiring PET data to obtain a first PET image; receiving a second respiratory signal; wherein the second respiratory signal is obtained by scanning a subject to be measured within a scanning range of a PET scanning device using a radar device; performing respiratory artifact correction on the first PET image according to the second respiratory signal to obtain a second PET image; Perform image registration on the second PET image and the CT image to generate a medical image of the object to be measured.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 9 are implemented.

Images