Control method and device of medical scanning system and medical scanning system

Abstract

The invention relates to the technical field of medical scanning, and provides a control method and device of a medical scanning system and the medical scanning system. The method can be used for carrying out physiological movement suppression imaging on a scanned object, a respiratory movement suppression component is placed on the surface of the scanned object, and the method comprises the steps that respiratory movement of the scanned object is monitored, and a current respiratory movement monitoring result is obtained; in response to the condition that the current respiratory movement monitoring result meets the trigger condition, controlling a respiratory movement suppression component to apply compression to the surface of the scanned object to suppress respiratory movement, and controlling the medical scanning system to execute a scanning sequence; and determining a waiting period according to the scanning sequence, and removing the compression of the respiratory movement suppression component on the surface of the scanning object in the waiting period, so that the scanning object is in a free breathing state.

Description

Technical Field

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

[0002] Medical images of the scanned object can be obtained by performing medical scans on the scanned object based on magnetic resonance technology. In order to ensure image quality and reduce image artifacts, some medical scanning scenarios (such as coronary artery imaging, cardiac 4DFlow imaging, cardiac 3DPSIR imaging, and thoracic and abdominal great vessel imaging) can perform medical scans when the scanned object is breathing steadily. This type of medical scanning scenario belongs to a medical scanning scenario based on respiratory triggering. In the current processing method, the scanned object is generally informed to maintain steady breathing. Whether the scanned object is in a steady breathing state during the medical scan is more dependent on the autonomy of the scanned object, and it is difficult to guarantee the success rate of the medical scan. Summary of the invention

[0003] Based on this, it is necessary to provide a control method and device for a medical scanning system, a medical scanning system, a storage medium and a computer program product to address the above technical issues.

[0004] The present application provides a control method of a medical scanning system for performing physiological motion suppression imaging on a scanned object, wherein a respiratory motion suppression component is placed on the surface of the scanned object, and the method comprises:

[0005] Monitoring the respiratory motion of the scanned object and obtaining a current respiratory motion monitoring result;

[0006] In response to the current respiratory motion monitoring result satisfying a trigger condition, controlling the respiratory motion suppression component to apply pressure to the surface of the scanned object to suppress the respiratory motion, and controlling the medical scanning system to execute a scanning sequence;

[0007] A waiting period is determined according to the scanning sequence, and during the waiting period, the pressure of the respiratory motion suppression component on the surface of the scanned object is removed, so that the scanned object is in a free breathing state.

[0008] In one embodiment, controlling the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress the respiratory movement includes: controlling the filling of filler into the filling material receiving cavity of the respiratory movement suppression component at a set filling speed so that the internal pressure of the respiratory movement suppression component increases to a preset value within a set time period.

[0009] In one embodiment, before controlling the filling material to fill the filling material holding chamber of the respiratory movement suppression component at a set filling speed so that the internal pressure of the respiratory movement suppression component increases to a preset value within a set time, the method further includes: obtaining a set time according to the time between a first moment and a second moment; the first moment is the moment when the current respiratory movement monitoring result is monitored to meet the trigger condition, and the second moment is the moment when the scanning sequence is executed; obtaining the pressure difference between the current value of the internal pressure of the respiratory movement suppression component and the preset value; and determining the set filling speed according to the set time and the pressure difference.

[0010] In one embodiment, determining the set charging speed according to the set time and the pressure difference includes: obtaining a theoretical charging speed according to a ratio between the pressure difference and the set time; when the theoretical charging speed is less than or equal to the safe charging speed, using the theoretical charging speed as the set charging speed; when the theoretical charging speed is greater than the safe charging speed, using the safe charging speed as the set charging speed.

[0011] In one embodiment, removing the pressure of the respiratory movement suppression component on the surface of the scanned object during the waiting period includes: when the theoretical filling speed is less than or equal to the safe filling speed, controlling the internal pressure of the respiratory movement suppression component to be reduced to a first value during the waiting period; when the theoretical filling speed is greater than the safe filling speed, controlling the internal pressure of the respiratory movement suppression component to be reduced to a second value during the waiting period; the second value is greater than the first value.

[0012] In one embodiment, before controlling the medical scanning system to execute a scanning sequence, the method further includes: determining whether the current pressure on the surface of the scanned object is within a safe range; if not within the safe range, issuing a pressure adjustment reminder.

[0013] The present application provides a control device for a medical scanning system, which is used for performing physiological motion suppression imaging on a scanned object, wherein a respiratory motion suppression component is placed on the surface of the scanned object, and the device comprises:

[0014] A respiratory monitoring module, used to monitor the respiratory movement of the scanned object and obtain current respiratory movement monitoring results;

[0015] a pressure adjustment module, for controlling the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress the respiratory movement in response to the current respiratory movement monitoring result satisfying a trigger condition, and controlling the medical scanning system to execute a scanning sequence;

[0016] The pressure adjustment module is further used to determine a waiting period according to the scanning sequence, and remove the pressure of the respiratory movement suppression component on the surface of the scanned object during the waiting period, so that the scanned object is in a free breathing state.

[0017] The present application provides a medical scanning system, comprising:

[0018] A scanner, which forms a receiving cavity, comprises a main magnet, a gradient coil and a body transmitting coil which are sequentially distributed from outside to inside along the radial direction of the receiving cavity, wherein the main magnet is used to generate a main magnetic field, the gradient coil is used to generate a gradient field, and the body transmitting coil can generate a radio frequency field;

[0019] A respiratory motion suppression component placed on the surface of the scanned object;

[0020] A controller is used to obtain a current respiratory movement monitoring result of the scanned object, and in response to the current respiratory movement monitoring result satisfying a trigger condition, control the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress the respiratory movement, and control the gradient coil to generate gradient pulses and control the body transmitting coil to generate radio frequency pulses according to a scan sequence; and determine a waiting period according to the scan sequence, and control the respiratory movement suppression component to stop applying pressure to the surface of the scanned object during the waiting period.

[0021] In one embodiment, the respiratory motion suppression component is an elastic component, an inflatable component, or a mobile compression component.

[0022] In one embodiment, when the respiratory movement suppressing component is the elastic component or the inflatable component, the stretchability of the respiratory movement suppressing component on a side close to the surface of the scanned object is greater than the stretchability on a side away from the surface of the scanned object.

[0023] The present application provides a computer device, including a memory and a controller, wherein the memory stores a computer program, and the controller implements the steps in the above-mentioned various method embodiments when executing the computer program.

[0024] The present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a controller to execute the above method.

[0025] The present application provides a computer program product, on which a computer program is stored, and the computer program is executed by a controller to execute the above method.

[0026] The method provided in the present application can be used to perform physiological motion suppression imaging on a scanned object. After a respiratory movement suppression component is placed on the surface of the scanned object, the respiratory movement of the scanned object can be monitored to obtain a current respiratory movement monitoring result; in response to the current respiratory movement monitoring result satisfying a trigger condition, the respiratory movement suppression component is controlled to apply pressure to the surface of the scanned object to suppress the respiratory movement, and the medical scanning system is controlled to execute a scanning sequence to ensure that the scanned object is in a stable breathing state during the medical scanning process, turning passivity into activeness and ensuring the success rate of the medical scanning; a waiting period is determined according to the scanning sequence, and the pressure of the respiratory movement suppression component on the surface of the scanned object is removed during the waiting period to put the scanned object in a free breathing state. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of an application environment of a medical scanning system in an embodiment;

[0028] Figure 2 is a schematic diagram of an application environment of a medical scanning system in another embodiment;

[0029] Figure 3 is a flow chart of a control method of a medical scanning system in one embodiment;

[0030] Figure 4 is a schematic diagram of a layer interleaved acquisition mode in one embodiment;

[0031] Figure 5 A schematic diagram of phases involved in movie imaging in one embodiment;

[0032] Figure 6 is a structural block diagram of a control device of a medical scanning system in one embodiment;

[0033] Figure 7 FIG. 4 is a diagram showing the internal structure of a medical scanning system in one embodiment. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0036] The present application provides a medical scanning system, which includes: a scanner, a respiratory motion suppression component and a controller.

[0037] The scanner forms a receiving cavity, and includes a main magnet, a gradient coil and a body transmitting coil which are distributed in sequence from outside to inside along the radial direction of the receiving cavity. The main magnet is used to generate a main magnetic field, the gradient coil is used to generate a gradient field, and the body transmitting coil can generate a radio frequency field.

[0038] The scanned object may lie on a hospital bed. The respiratory motion suppression component may be placed on the surface of the scanned object. When the chest cavity is the part that the scanned object relies on for breathing, the respiratory motion suppression component may be placed on the chest cavity surface or the abdominal surface of the scanned object.

[0039] In one embodiment, the respiratory motion suppression component can be an elastic component, an inflatable component, or a mobile compression component, wherein the mobile compression component is made of a hard material and can compress the surface of the scanned object similar to a massager.

[0040] When the respiratory motion suppression component is an inflatable component, the specific construction method can be various.

[0041] One of the construction methods is that the inflatable component includes a fluid containing cavity (a filling material containing cavity), gas or liquid can be filled into the fluid containing cavity, and gas or liquid can be discharged from the fluid containing cavity. The fluid containing cavity can be formed by a flexible and stretchable material. By filling the fluid containing cavity with gas, pressure can be applied to the surface of the scanned object; specifically, refer to Figure 1 The bed and the inflatable component are placed in a fixed bracket, which can be made of hard material. When the fluid receiving chamber of the inflatable component is filled with gas, the inflatable component will exert pressure on the surface of the scanned object due to the restriction of the fixed bracket. The pressure exerted on the surface of the scanned object can be removed by exhausting gas from the fluid receiving chamber.

[0042] Reference Figure 1 When filling gas into the fluid containing chamber, the gas filling and exhausting device can fill gas into the fluid containing chamber through the conduit, and when exhausting gas from the fluid containing chamber, the gas filling and exhausting device can suck out the gas from the fluid containing chamber through the conduit.

[0043] Another construction method: the inflatable component includes an integrated flexible coil, referring to Figure 2 The coil may include a coil air layer and a coil electronic layer. The coil electronic layer is the electronic unit of the coil for signal reception, and the coil air layer is the module layer for inflating and pressurizing, in which an inflatable flexible liner (a filling material accommodating chamber) is placed. Fixed binding is used to fix the coil position, and its length can be adjusted to suit different body shapes.

[0044] Reference Figure 2 When filling gas into the inflatable flexible liner, the gas filling and exhausting device can fill gas into the inflatable flexible liner through the conduit, and when exhausting gas from the inflatable flexible liner, the gas filling and exhausting device can suck out the gas from the inflatable flexible liner through the conduit.

[0045] Furthermore, when the respiratory movement suppression component is an elastic component or an inflatable component, the stretchability of the respiratory movement suppression component on a side close to the surface of the scanned object is greater than the stretchability of the side away from the surface of the scanned object.

[0046] The controller is used to obtain the current respiratory movement monitoring result of the scanned object, and in response to the current respiratory movement monitoring result satisfying the trigger condition, control the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress the respiratory movement, and control the gradient coil to generate gradient pulses according to the scanning sequence, and control the body transmitting coil to generate radio frequency pulses; and determine the waiting period according to the scanning sequence, and control the respiratory movement suppression component to stop applying pressure to the surface of the scanned object during the waiting period.

[0047] Specifically, the controller can obtain the current respiratory movement monitoring result of the scanned object through the respiratory monitoring device. When the current respiratory movement monitoring result meets the trigger condition, it indicates that the respiratory trigger acquisition moment has arrived. At this time, the respiratory movement suppression component can be controlled to apply pressure to the surface of the scanned object to suppress the respiratory movement, and the medical scanning system can be controlled to execute the scanning sequence to collect data to obtain the required data lines, so as to perform medical scanning when the respiratory movement of the scanned object is relatively stable. When controlling the medical scanning system to execute the scanning sequence, it can specifically control the gradient coil to generate gradient pulses according to the scanning sequence, and control the body transmitting coil to generate radio frequency pulses.

[0048] Among them, the controller can control the medical scanning system to execute the scanning sequence through the magnetic resonance spectrometer (which can be simply referred to as the spectrometer). Specifically, when the controller determines that the respiratory trigger acquisition time has arrived, it can generate a data acquisition trigger signal and send it to the nuclear magnetic resonance spectrometer to trigger the medical scanning system to execute the scanning sequence.

[0049] Take the respiratory movement suppression component as an inflatable component as an example: when the nuclear magnetic resonance spectrometer and the gas filling and exhaust device are connected through a synchronization trigger line, the data acquisition trigger signal can be transmitted from the nuclear magnetic resonance spectrometer to the gas filling and exhaust device through the synchronization trigger line, thereby controlling the gas filling and exhaust device to fill gas into the inflatable component, thereby applying pressure to the surface of the scanned object to suppress the respiratory movement of the scanned object.

[0050] The controller can obtain the data acquisition window of the medical scan according to the scanning sequence. The end time of the data acquisition window is the start time of the waiting period. When the data acquisition window ends, the waiting period begins. During the waiting period, the respiratory movement suppression component can be controlled to stop applying pressure to the surface of the scanned object, and the pressure on the surface of the scanned object can be further removed.

[0051] The controller can continue to obtain the respiratory movement monitoring results of the scanned object, waiting for the arrival of the next respiratory trigger acquisition moment, until all data lines are acquired.

[0052] In the above embodiment, in response to the current respiratory movement monitoring result of the scanned object satisfying the trigger condition, the respiratory movement suppression component is controlled to apply pressure to the surface of the scanned object to suppress the respiratory movement, and the gradient coil is controlled to generate gradient pulses according to the scanning sequence, and the body transmitting coil is controlled to generate radio frequency pulses, so as to ensure that the scanned object is in a stable breathing state during the medical scanning process, turning passive into active, and ensuring the success rate of the medical scanning; during the waiting period, the respiratory movement suppression component is controlled to stop applying pressure to the surface of the scanned object to avoid continuing to restrict the respiratory movement of the scanned object.

[0053] The above controller can execute each step in the control method of the medical scanning system provided in the present application, which is described in detail below.

[0054] The present application provides a control method for a medical scanning system, which can be used to perform physiological motion suppression imaging on a scanned object, wherein a respiratory motion suppression component is placed on the surface of the scanned object. The steps of the method can be executed by the above controller, including: Figure 3 The steps shown are:

[0055] Step S301 , monitoring the respiratory movement of the scanned object and obtaining the current respiratory movement monitoring result.

[0056] The controller can obtain the current respiratory movement monitoring result of the scanned object through the respiratory monitoring device, and determine whether the current respiratory movement monitoring result meets the trigger condition.

[0057] Step S302 : in response to the current respiratory motion monitoring result satisfying the trigger condition, controlling the respiratory motion suppression component to apply pressure to the surface of the scanned object to suppress the respiratory motion, and controlling the medical scanning system to execute a scanning sequence.

[0058] When the current respiratory movement monitoring result meets the trigger condition, it indicates that the respiratory trigger acquisition moment has arrived. At this time, the respiratory movement suppression component can be controlled to apply pressure to the surface of the scanned object to suppress the respiratory movement, and the medical scanning system can be controlled to execute the scanning sequence to collect data to obtain the required data lines.

[0059] Step S303: determining a waiting period according to the scanning sequence, and removing the pressure of the respiratory motion suppression component on the surface of the scanned object during the waiting period, so that the scanned object is in a free breathing state.

[0060] The controller can obtain the data acquisition window of the medical scan according to the scanning sequence. The end time of the data acquisition window is the start time of the waiting period. When the data acquisition window ends, the waiting period begins. During the waiting period, the controller can remove the pressure of the respiratory movement suppression component on the surface of the scanned object to make the scanned object in a free breathing state.

[0061] The controller can continue to obtain the respiratory movement monitoring results of the scanned object, waiting for the arrival of the next respiratory trigger acquisition moment, until all data lines are acquired.

[0062] The control method of the above-mentioned medical scanning system can be used to perform physiological motion suppression imaging on the scanned object. After a respiratory movement suppression component is placed on the surface of the scanned object, the respiratory movement of the scanned object can be monitored to obtain the current respiratory movement monitoring result; in response to the current respiratory movement monitoring result satisfying the trigger condition, the respiratory movement suppression component is controlled to apply pressure to the surface of the scanned object to suppress the respiratory movement, and the medical scanning system is controlled to execute the scanning sequence to ensure that the scanned object is in a stable breathing state during the medical scanning process, turning passive into active, and ensuring the success rate of the medical scanning; the waiting period is determined according to the scanning sequence, and the pressure of the respiratory movement suppression component on the surface of the scanned object is removed during the waiting period, so that the scanned object is in a free breathing state.

[0063] Considering that the patient may not be able to cooperate with regular breathing or calm breathing, optionally, the acquisition of the scanning sequence in step S302 may be performed in a combination of a line mode and an interlaced scanning mode.

[0064] Multiple layers are collected within a repetition time (TR). In order to gradually reduce the crosstalk caused by the successive excitation of adjacent layers, an interlaced scanning mode is adopted. This interlaced scanning mode belongs to the layer interlaced acquisition method, such as Figure 4, in each TR, layer 1, layer 3, layer 5 and layer 2N-1 are collected in an interlaced manner, where N can be an integer such as 4, 5, 6, etc.; further, in each of the above TRs, after collecting one or more data lines of one layer, one or more data lines of another layer are collected (the collection mode is a line mode), and the data lines can adopt radial sampling data lines.

[0065] The combination of line mode and interlaced scanning mode can avoid inter-layer crosstalk; moreover, combined with the aforementioned external active respiratory suppression scheme, it can avoid erroneous excitation caused by layer position changes caused by respiratory movement.

[0066] In one embodiment, the entire scanning period can be divided into a plurality of physiological cycles, and each physiological cycle can be divided into different phases, such as Figure 5 P1 to P8 are shown, and each phase corresponds to a frame in the movie imaging, and signal acquisition is performed in each phase. Figure 5 As shown, the physiological cycle is divided into eight phases, and only partial data lines of the same phase are collected in each physiological movement cycle. Exemplarily, in the first physiological movement cycle, 3 data lines of P1 to P8 are collected respectively, and in the second physiological movement cycle, another 3 data lines of P1 to P8 are collected respectively. Thus, according to the partial data lines of the same phase collected in multiple physiological cycles, the complete data lines of the phase are obtained, and the image of the phase is reconstructed according to the complete data lines of the phase. In this way, the images of P1 to P8 can be obtained respectively, and the movie image can be obtained.

[0067] Among them, each data line can be constructed according to K-space data. Optionally, the K-space data of different phases can be determined by sliding window interpolation. In one embodiment, the sliding window is set to a fixed window, and moving the fixed window according to the set step size can obtain multiple window data (such as P1, P3, P5, P7, etc. in the above figure); each window data can correspond to a time period, and the data of adjacent time periods can be shared in proportion to form interpolation window data. In the figure, each part of P1 and P3 can be used as part of the data of P2, thereby obtaining the data line of P2; each part of P3 and P5 in the figure can be used as part of the data of P5, thereby obtaining the data line of P5. In this way, using the aforementioned complete K-space data lines and interpolation window data, a movie image with improved temporal resolution can be obtained.

[0068] The embodiment of the present application can reduce the requirements for time resolution during data acquisition and improve the data reconstruction speed during dynamic abdominal imaging by sharing data between different phases.

[0069] In one embodiment, before controlling the medical scanning system to execute the scanning sequence in step S302, the method provided by the present application further includes: determining whether the current pressure on the surface of the scanned object is within a safe range; if not within the safe range, issuing a pressure adjustment reminder.

[0070] Reference Figure 1 or Figure 2 A pressure sensor can be set on the catheter to monitor the current pressure on the surface of the scanned object. When the controller detects that the current pressure on the surface of the scanned object is not within a safe range, a pressure adjustment reminder can be issued to ensure the safety of the scanned object.

[0071] In one embodiment, controlling the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress respiratory movement in step S302 includes: controlling the filling material to be filled into the filling material receiving cavity of the respiratory movement suppression component at a set filling speed so that the internal pressure of the respiratory movement suppression component increases to a preset value within a set time period.

[0072] The filler may be a fluid such as gas or liquid, and the filler receiving cavity may be used to receive a fluid such as gas or liquid. During medical scanning, the pressure inside the respiratory motion suppression component generally needs to reach a certain value (which may be referred to as a preset value) to achieve a good suppression effect on the respiratory motion of the scanned object.

[0073] In this embodiment, the controller can control the filling of the filler into the filler holding cavity according to the set filling speed, so that the pressure inside the respiratory movement suppression component can increase to a preset value within a set time period, thereby forming a better suppression effect on the respiratory movement of the scanned object and ensuring the success rate of the medical scan.

[0074] In one embodiment, the method provided in the present application also includes: obtaining a set duration based on the duration between the first moment and the second moment; obtaining the pressure difference between the current value of the internal pressure of the respiratory movement inhibition component and the preset value; and determining a set filling speed based on the set duration and the pressure difference.

[0075] The first moment is the moment when the current respiratory movement monitoring result meets the trigger condition, and the second moment is the moment when the scanning sequence is executed.

[0076] For example, the controller can use the moment when the current respiratory motion monitoring result meets the trigger condition as the first moment, and the moment when the scanning sequence is executed as the second moment; obtain the difference between the first moment and the second moment, and obtain the set time length t based on the difference. The controller can also obtain the current value of the internal pressure of the respiratory motion suppression component, and obtain the pressure difference between the current value and the preset value. △ P; then, the pressure difference △P is divided by the set time t to obtain the pressure value that needs to be increased per unit time. Based on the pressure value that needs to be increased per unit time, the set filling speed is determined to ensure that the internal pressure of the respiratory movement suppression component can be increased to the preset value when or before executing the scanning sequence, so as to form a better suppression effect on the respiratory movement of the scanned object and ensure the success rate of the medical scan.

[0077] In one embodiment, the above-mentioned determination of the set charging speed based on the set time and the pressure difference may specifically include: obtaining a theoretical charging speed based on the ratio between the pressure difference and the set time; when the theoretical charging speed is less than or equal to the safe charging speed, using the theoretical charging speed as the set charging speed; when the theoretical charging speed is greater than the safe charging speed, using the safe charging speed as the set charging speed.

[0078] The controller can adjust the pressure difference △ P is divided by the set time t to obtain the ratio, which is the pressure value that needs to be increased per unit time. The charging speed obtained based on the pressure value that needs to be increased per unit time can be called the theoretical charging speed.

[0079] In order to ensure the safety of the scanned object and avoid a large pressure on the scanned object per unit time, the theoretical filling speed can be compared with the safe filling speed. If the theoretical filling speed is less than or equal to the safe filling speed, when the filler is controlled to be filled into the filler receiving cavity according to the theoretical filling speed, it should not cause a large pressure on the scanned object per unit time. Therefore, the theoretical filling speed can be used as the set filling speed. If the theoretical filling speed is greater than the safe filling speed, when the filler is controlled to be filled into the filler receiving cavity according to the theoretical filling speed, it may cause a large pressure on the scanned object per unit time. Therefore, the safe filling speed can be used as the set filling speed.

[0080] In one embodiment, the step S303 of removing the pressure of the respiratory movement suppression component on the surface of the scanned object during the waiting period includes: when the theoretical filling speed is less than or equal to the safe filling speed, controlling the internal pressure of the respiratory movement suppression component to be reduced to a first value during the waiting period; when the theoretical filling speed is greater than the safe filling speed, controlling the internal pressure of the respiratory movement suppression component to be reduced to a second value during the waiting period; the second value is greater than the first value.

[0081] When the theoretical filling speed is greater than the safe filling speed, the set filling speed used is the safe filling speed. When the set filling speed used is less than the theoretical filling speed, the respiratory motion suppression component is difficult to reach the set value within the set time t. In the current data acquisition window, the suppression effect on the respiratory motion of the scanned object is not as expected. The possible reason why the respiratory motion suppression component is difficult to reach the set value within the set time t is the pressure difference. △ P is larger.

[0082] Therefore, when the theoretical charging speed is greater than the safe charging speed, compared with the case where the theoretical charging speed is less than or equal to the safe charging speed, the internal pressure of the respiratory movement inhibition component is controlled to not decrease too much during the waiting period (embodied in: when the theoretical charging speed is greater than the safe charging speed, the internal pressure of the respiratory movement inhibition component is controlled to decrease to the second value during the waiting period; when the theoretical charging speed is less than or equal to the safe charging speed, the internal pressure of the respiratory movement inhibition component is controlled to decrease to a first value less than the second value during the waiting period). When the next respiratory trigger collection moment arrives, the determined pressure difference △ P will not be too large, so as to ensure as much as possible that the expected suppression effect on the respiratory motion of the scanned object is achieved within the next data acquisition window.

[0083] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0084] In one embodiment, Figure 6 As shown, a control device of a medical scanning system is provided, which can be used to perform physiological motion suppression imaging on a scanned object, wherein a respiratory motion suppression component is placed on the surface of the scanned object, and the device comprises:

[0085] A respiratory monitoring module 601 is used to monitor the respiratory movement of the scanned object and obtain the current respiratory movement monitoring result;

[0086] A pressure adjustment module 602, for controlling the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress the respiratory movement in response to the current respiratory movement monitoring result satisfying a trigger condition, and controlling the medical scanning system to execute a scanning sequence;

[0087] The pressure adjustment module 602 is further configured to determine a waiting period according to the scanning sequence, and remove the pressure of the respiratory motion suppression component on the surface of the scanned object during the waiting period, so that the scanned object is in a free breathing state.

[0088] In one embodiment, the pressure adjustment module 602 is further used to control the filling of the filler into the filler receiving cavity of the respiratory movement suppression component at a set filling speed, so that the internal pressure of the respiratory movement suppression component increases to a preset value within a set time period.

[0089] In one embodiment, the device also includes a filling speed acquisition module, which is used to obtain a set duration based on the duration between a first moment and a second moment; the first moment is the moment when the current respiratory movement monitoring result is monitored to meet the trigger condition, and the second moment is the moment when the scanning sequence is executed; obtain the pressure difference between the current value of the internal pressure of the respiratory movement inhibition component and the preset value; determine the set filling speed based on the set duration and the pressure difference.

[0090] In one embodiment, the charging speed acquisition module is also used to obtain a theoretical charging speed based on the ratio between the pressure difference and the set time length; when the theoretical charging speed is less than or equal to the safe charging speed, the theoretical charging speed is used as the set charging speed; when the theoretical charging speed is greater than the safe charging speed, the safe charging speed is used as the set charging speed.

[0091] In one embodiment, the pressure adjustment module 602 is also used to control the internal pressure of the respiratory movement suppression component to be reduced to a first value during the waiting period when the theoretical filling speed is less than or equal to the safe filling speed; when the theoretical filling speed is greater than the safe filling speed, control the internal pressure of the respiratory movement suppression component to be reduced to a second value during the waiting period; the second value is greater than the first value.

[0092] In one embodiment, the device further comprises a pressure adjustment reminder module, which is used to determine whether the current pressure on the surface of the scanned object is within a safe range; if it is not within the safe range, a pressure adjustment reminder is issued.

[0093] The specific definition of the control device of the medical scanning system can be found in the definition of the control method of the medical scanning system mentioned above, and will not be repeated here. Each module in the control device of the medical scanning system can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in or independent of the controller in the medical scanning system in the form of hardware, or can be stored in the memory of the medical scanning system in the form of software, so that the controller can call and execute the operations corresponding to each of the above modules.

[0094] In one embodiment, a computer device is provided, whose internal structure diagram can be as follows: Figure 7As shown. The computer device includes a controller, a memory and a network interface connected through a system bus. Among them, the controller of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store control data of the computer device. The network interface of the computer device is used to communicate with an external terminal through a network connection. The computer device also includes an input and output interface, which is a connection circuit for exchanging information between the controller and the external device. They are connected to the controller through a bus, referred to as an I / O interface. When the computer program is executed by the controller, a control method of a computer device is implemented.

[0095] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0096] In one embodiment, a computer device is provided, including a memory and a controller, wherein the memory stores a computer program, and the controller implements the steps in the above-mentioned various method embodiments when executing the computer program.

[0097] 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 controller, the steps in the above-mentioned method embodiments are implemented.

[0098] In one embodiment, a computer program product is provided, on which a computer program is stored, and the computer program is used by a controller to execute the steps in the above-mentioned various method embodiments.

[0099] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the above-mentioned 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 at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0100] The technical features of the above embodiments may be arbitrarily combined. 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.

[0101] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A control method of a medical scanning system, for performing physiological motion suppression imaging on a scanned object, wherein a respiratory motion suppression component is placed on the surface of the scanned object, characterized in that: The method comprises: Monitoring the respiratory motion of the scanned object and obtaining a current respiratory motion monitoring result; In response to the current respiratory motion monitoring result satisfying a trigger condition, controlling the respiratory motion suppression component to apply pressure to the surface of the scanned object to suppress the respiratory motion, and controlling the medical scanning system to execute a scanning sequence; A waiting period is determined according to the scanning sequence, and during the waiting period, the pressure exerted by the respiratory motion suppression component on the surface of the scanned object is removed, so that the scanned object is in a free breathing state.

2. The method according to claim 1, characterized in that The controlling the respiratory motion suppressing component to apply pressure to the surface of the scanned object to suppress the respiratory motion comprises: According to the set filling speed, the filler is controlled to be filled into the filler accommodating chamber of the respiratory movement suppression component, so that the internal pressure of the respiratory movement suppression component increases to a preset value within a set time.

3. The method according to claim 2, characterized in that Before controlling the filling material to be filled into the filling material receiving cavity of the respiratory movement suppression component at a set filling speed so that the internal pressure of the respiratory movement suppression component increases to a preset value within a set time period, the method further includes: The set duration is obtained according to the duration between the first moment and the second moment; the first moment is the moment when the current respiratory movement monitoring result meets the trigger condition, and the second moment is the moment when the scanning sequence is executed; Acquire a pressure difference between a current value and a preset value of the internal pressure of the respiratory movement suppression component; The set charging speed is determined according to the set time length and the pressure difference.

4. The method according to claim 3, characterized in that The step of determining the set charging speed according to the set time and the pressure difference includes: Obtaining a theoretical charging speed according to a ratio between the pressure difference and the set time length; When the theoretical charging speed is less than or equal to the safe charging speed, the theoretical charging speed is used as the set charging speed; When the theoretical charging speed is greater than the safe charging speed, the safe charging speed is used as the set charging speed.

5. The method according to claim 4, characterized in that The step of removing the pressure of the respiratory movement suppression component on the surface of the scanned object during the waiting period includes: When the theoretical filling speed is less than or equal to the safe filling speed, controlling the internal pressure of the respiratory movement suppression component to decrease to a first value during the waiting period; When the theoretical filling speed is greater than the safe filling speed, the internal pressure of the respiratory movement suppression component is controlled to decrease to a second value during the waiting period; the second value is greater than the first value.

6. The method according to any one of claims 1 to 5, characterized in that: Before controlling the medical scanning system to perform a scanning sequence, the method further includes: Determining whether the current pressure on the surface of the scanned object is within a safe range; If it is not within the safe range, a pressure adjustment reminder will be issued.

7. A control device for a medical scanning system, used for performing physiological motion suppression imaging on a scanned object, wherein a respiratory motion suppression component is placed on the surface of the scanned object, characterized in that: The device comprises: A respiratory monitoring module, used to monitor the respiratory movement of the scanned object and obtain current respiratory movement monitoring results; a pressure adjustment module, for controlling the respiratory movement suppression component to apply pressure to the surface of the scanned object to suppress the respiratory movement in response to the current respiratory movement monitoring result satisfying a trigger condition, and controlling the medical scanning system to execute a scanning sequence; The pressure adjustment module is further used to determine a waiting period according to the scanning sequence, and remove the pressure of the respiratory movement suppression component on the surface of the scanned object during the waiting period, so that the scanned object is in a free breathing state.

8. A medical scanning system, characterized in that: include: A scanner, which forms a receiving cavity, comprises a main magnet, a gradient coil and a body transmitting coil which are sequentially distributed from outside to inside along the radial direction of the receiving cavity, wherein the main magnet is used to generate a main magnetic field, the gradient coil is used to generate a gradient field, and the body transmitting coil can generate a radio frequency field; A respiratory motion suppression component placed on the surface of the scanned object; a controller, configured to obtain a current respiratory motion monitoring result of the scanned object, and in response to the current respiratory motion monitoring result satisfying a trigger condition, control the respiratory motion suppression component to apply pressure to the surface of the scanned object to suppress the respiratory motion, and control the gradient coil to generate a gradient pulse according to a scan sequence, and control the body transmitting coil to generate a radio frequency pulse; And, a waiting period is determined according to the scanning sequence, and during the waiting period, the respiratory motion suppression component is controlled to stop applying pressure to the surface of the scanned object.

9. The medical scanning system according to claim 8, characterized in that: The respiratory movement suppression component is an elastic component, an inflatable component, or a moving compression component.

10. The medical scanning system according to claim 9, characterized in that: When the respiratory movement suppressing component is the elastic component or the inflatable component, the stretchability of the respiratory movement suppressing component on a side close to the surface of the scanned object is greater than the stretchability of the side away from the surface of the scanned object.

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