A cardiac magnetic resonance examination apparatus

Abstract

The present application relates to magnetic resonance examination device technical field, specifically to a kind of cardiac magnetic resonance examination device, including fixed plate and electrocardiogram control patch, fixed plate is equipped with chest coil;Fixed plate is detachably connected with detection plate, detection plate is equipped with breathing training component for exerting chest pressure, breathing training component is electrically connected with control panel;Control panel records and draws fluctuation curve based on the pressure data detected by breathing training component, then obtains the breathing interval of patient based on fluctuation curve, sends breath-holding reminding instruction to voice module according to breathing interval;Detection plate side away from fixed plate is equipped with several electrocardiogram monitoring electrode pieces for detecting the quality of heart beat signal strength, detection plate is equipped with driving mechanism for driving electrocardiogram monitoring electrode piece to move in range;The present application is used to assist patient breathing breath control, realize the accurate matching of patient breathing breath opportunity and imaging sequence, reduce the generation of breathing artifact, guarantee the progress of cardiac magnetic resonance.

Description

Technical Field

[0001] This invention relates to the field of magnetic resonance imaging (MRI) devices, and more specifically to a cardiac MRI device. Background Technology

[0002] Traditional cardiac examination techniques such as electrocardiography (ECG), echocardiography, coronary CTA, and interventional cardiac procedures are valuable in specific situations, but they are limited by imaging principles and equipment performance, making it difficult to comprehensively assess the complex pathological features of the heart. For example, ECG can only reflect abnormalities in cardiac electrical activity, echocardiography has limitations in displaying myocardial tissue characteristics, and while coronary CTA can observe vascular structure, it cannot directly assess myocardial activity. These techniques cannot achieve a comprehensive assessment of cardiac structure, function, blood perfusion, and tissue composition, resulting in blind spots in the diagnosis of some complex cardiac diseases.

[0003] With the advent of cardiac magnetic resonance imaging (MRI), it has become the gold standard for non-invasive assessment of cardiac structure and function. Cardiac MRI is based on the resonance phenomenon of hydrogen nuclei in human tissues within a strong magnetic field: when a patient enters the MRI machine, radiofrequency pulses excite the hydrogen nuclei to resonate; after the pulses stop, the hydrogen nuclei release energy, and the machine receives and processes these signals to generate high-resolution images. Compared to traditional cardiac examination techniques, it has the following advantages: 1. No ionizing radiation or dependence on iodine contrast agents, resulting in higher safety, especially suitable for children, pregnant women, and patients with renal insufficiency; 2. Excellent soft tissue contrast, clearly displaying subtle lesions in structures such as the myocardium, pericardium, and valves, such as myocardial fibrosis, edema, and fatty infiltration; 3. Multi-parameter, multi-sequence imaging capabilities, allowing simultaneous assessment of cardiac anatomy, motor function, myocardial perfusion, and tissue activity through techniques such as cine sequences, black-blood sequences, and delayed-enhancement imaging.

[0004] Since cardiac magnetic resonance imaging (MRI) synchronizes the differences in cardiac systolic and diastolic pulsations using ECG gating technology, combined with rapid imaging sequences to counteract the effects of cardiac pulsation and thus capture clear images, the hardware quality of ECG gating directly determines the cardiac MRI commands. Furthermore, the close proximity of the chest coil to the ECG electrodes means that radio frequency noise generated during coil operation may interfere with the ECG signal, leading to inaccurate gating trigger points. Therefore, a highly compatible chest coil is necessary to ensure the stability of ECG signal acquisition and the uniformity of the magnetic field.

[0005] In cardiac magnetic resonance imaging, in addition to the hardware support mentioned above, the patient's respiratory movements cause the heart to shift position, becoming out of sync with the scanning sequence. This leads to misaligned and superimposed signals, resulting in blurred images, ghosting, or striped artifacts, directly affecting the observation of cardiac structure and functional measurements. Therefore, existing technologies can guide the patient to hold their breath at the end of expiration (when respiratory movements cease and the heart position is stable) in conjunction with a rapid imaging sequence to complete data acquisition.

[0006] However, during breath-holding tests, each patient's breathing rate, depth, and rhythm differ. Some patients habitually breathe shallowly and rapidly, and may quickly feel short of breath during breath-holding; while patients accustomed to deep and slow breathing can hold their breath for a relatively longer time. Furthermore, patients such as children, those in postoperative recovery, those who are bedridden for extended periods, and those with respiratory diseases have insufficient cardiopulmonary reserve, making it difficult to maintain breath-holding for extended periods. Although breath-holding training can be used to control breathing before the examination, and prompts can guide the process during the test, short-term adjustments make it difficult to accurately match the patient's breath-holding timing with the imaging sequence, affecting image quality. Therefore, this invention provides a cardiac magnetic resonance imaging (MRI) device that assists in controlling the patient's breath-holding, achieving accurate matching between the patient's breath-holding timing and the imaging sequence, reducing respiratory artifacts, and ensuring the quality of cardiac MRI. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a cardiac magnetic resonance imaging (MRI) device to assist patients in controlling their breath-holding, achieving accurate matching between the timing of the patient's breath-holding and the imaging sequence, reducing the generation of respiratory artifacts, and ensuring the smooth conduct of cardiac MRI.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A cardiac magnetic resonance imaging (MRI) device includes a fixation plate placed on the patient's chest and an ECG-gated patch for adhering to the surface of the chest. The fixation plate is placed on an examination bed, and a chest coil is provided inside the fixation plate. A detection plate is detachably connected to the fixation plate, and a breathing training component for applying chest pressure is provided on the detection plate. The breathing training component includes an inflation bladder and a pressure sensor. The breathing training component is electrically connected to a control panel, and the control panel is electrically connected to a voice module. The pressure sensor is used to measure the pressure data generated by the patient's natural breathing. The control panel records and plots a fluctuation curve based on the pressure data, and then obtains the patient's breathing interval based on the fluctuation curve. A breath-holding reminder command is sent to the voice module according to the breathing interval.

[0009] The detection plate has several ECG monitoring electrodes on the side away from the fixed plate for detecting the strength of the heartbeat signal. The detection plate also has several moving blocks corresponding to the ECG monitoring electrodes on the side away from the fixed plate. The detection plate is equipped with a drive mechanism that moves the moving blocks within a range.

[0010] Furthermore, both sides of the fixing plate and the detection plate are curved.

[0011] Furthermore, the breathing training component includes an inflatable bladder fixedly connected to the detection plate. The inflatable bladder is located at one end of the detection plate that extends out of the fixed plate. The inflatable bladder is connected to a pneumatic component via a trachea. The pneumatic component is electrically connected to the control panel.

[0012] The pressure sensor is located on the side of the inflation bladder away from the detection plate. The control panel is used to calculate the time interval between the peaks and troughs in the reference curve when the fluctuation curve shows regular changes, and the time interval is used as the patient's breathing interval.

[0013] The breathing interval is then compared with the normal breathing interval of a healthy person. If the breathing interval is less than the normal breathing interval, a reminder command is sent to the outside world. At the same time, the breath-holding time is adjusted according to the ratio of the difference between the breathing interval and the normal breathing interval. Based on the adjusted breath-holding time, a corresponding breath-holding reminder command is generated and sent to the voice module. If the breathing interval is greater than or equal to the normal breathing interval, a pre-recorded breath-holding reminder command is sent to the voice module according to the normal breathing interval.

[0014] Furthermore, the breathing training component also includes a throat patch, on which a pressure sensor is located.

[0015] Furthermore, the driving mechanism includes a movable cavity opened on the detection plate, a number of push bladders slidingly fitted inside the movable cavity, a movable block located at the center of the movable cavity, and the push bladders arranged in a ring around the movable block, with one side of the push bladder fixedly connected to the movable block;

[0016] A pneumatic actuator is slidably fitted inside the moving block. The air inlet of the pneumatic actuator is connected to the pneumatic component through an air pipe, and the output end of the pneumatic actuator is detachably connected to the electrocardiogram monitoring electrode pads.

[0017] Furthermore, the control panel is also used to send a start command to the pneumatic components based on the breath-holding reminder command corresponding to the current breathing interval, obtain the pressure data after the breath-holding reminder command, compare the pressure data with the recorded value, if the pressure data is greater than the recorded value, obtain the breath-holding time recorded at the current time, and then compare the breath-holding time with the breathing interval. If the breath-holding time is greater than or equal to the breathing interval, a training normal command is sent to the outside; if the breath-holding time is less than the breathing interval, a training abnormal command is sent to the outside; if the pressure data is less than the recorded value, the breath-holding time is recorded.

[0018] Furthermore, the control panel is also used to record the number of training abnormalities when the breath-holding time is greater than or equal to the breathing interval. Within a set comparison time, the number of training abnormalities is compared with a set abnormal value. If the number of training abnormalities is greater than the abnormal value, an alert command is sent to the outside world; if the number of training abnormalities is less than the abnormal value, a standby command is sent to the outside world.

[0019] Furthermore, a marking cavity is opened inside the moving block, and a marking rod is slidably fitted inside the marking cavity. A piston is fixedly connected to one end of the marking rod, and the piston is slidably fitted with the marking cavity.

[0020] The marking chamber is connected to the pneumatic component via an air pipe, and a first solenoid valve is installed at the connection between the marking chamber and the air pipe. The first solenoid valve is electrically connected to the control panel.

[0021] When the piston on the marker rod is at the lowest point of the marker chamber, the marker rod is outside the moving block.

[0022] Furthermore, both the detection plate and the fixing plate have windows, and the windows are detachably connected to shielding plates.

[0023] Furthermore, the expansion bladder is divided into a partition, which divides the expansion bladder into a first chamber and a second chamber. The first chamber is located above the partition and is used to store disinfectant. The second chamber is used to store air. The expansion bladder corresponding to the first chamber is a fixed layer, and the expansion bladder corresponding to the second chamber is a deformable layer. A second solenoid valve and a one-way valve are connected on the partition.

[0024] The detection plate has several spray holes on both sides. The spray holes are connected to the first chamber of the expansion bladder through the air tube. A pressure valve is provided between the spray holes and the expansion bladder. An injection hole is connected to the expansion bladder and is connected to the first chamber. A plug is provided on the injection hole.

[0025] The above approach has the following beneficial effects:

[0026] 1. In this protocol, before cardiac MRI, the detection plate is mounted on a fixed plate equipped with a chest coil. This ensures that the breathing training component and ECG monitoring electrodes on the detection plate remain in constant contact with the chest skin. This allows for confirmation of the strength of ECG signals at different locations on the chest via the ECG monitoring electrodes, thereby improving the accuracy of subsequent ECG-gated patch detection. Simultaneously, the ECG monitoring electrodes simulate the pressure changes of the breathing training component during the acquisition process. These pressure changes allow patients to intuitively adjust their respiratory rate, facilitating accurate matching of the patient's breath-holding timing with the imaging sequence during subsequent cardiac MRI, and reducing respiratory artifacts.

[0027] 2. This solution uses ECG monitoring electrodes to obtain signal quality at different chest contact positions. A drive mechanism adjusts the position of the ECG monitoring electrodes on the moving block to adapt to the subtle differences in the chest cavity surface and the heart's position within the body of different patients. This ensures the accuracy of capturing the weak ECG signals generated by the heartbeat through ECG-gated patches and guarantees the successful completion of cardiac MRI.

[0028] 3. In this protocol, before cardiac MRI, the patient's breathing is guided by a breathing training component to train breath-holding skills, facilitating breath-holding control. Then, a voice module provides voice prompts for the patient to perform self-breathing and breath-holding. Based on the pressure data generated by the patient's self-breathing, the timing of breath-holding is determined to be accurate. This guided training method assists the patient in controlling breath-holding, achieving accurate matching between the patient's breath-holding timing and the imaging sequence, reducing respiratory artifacts, and ensuring the smooth progress of subsequent cardiac MRI.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] Figure 1 This is an isometric view of an embodiment of the cardiac magnetic resonance imaging device of the present invention;

[0031] Figure 2 This is a front view of an embodiment of the cardiac magnetic resonance imaging device of the present invention;

[0032] Figure 3 This is a bottom view of an embodiment of the cardiac magnetic resonance imaging device of the present invention;

[0033] Figure 4 for Figure 3 A cross-sectional view of the moving block.

[0034] The reference numerals in the accompanying drawings of the instruction manual include: 1. Fixing plate; 11. Window; 12. Shielding plate; 2. Detection plate; 21. Inflation bladder; 22. Pressure sensor; 23. Spray hole; 3. ECG monitoring electrode pad; 31. Push bladder; 32. Pneumatic push rod; 33. Moving block; 4. Marking rod. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The following detailed description illustrates the specific implementation method:

[0039] Example 1:

[0040] As attached Figures 1 to 4 The image shows a cardiac magnetic resonance imaging (MRI) device, comprising a fixation plate 1 placed on the patient's chest and an ECG-gated patch (not shown) for adhesion to the chest surface. The fixation plate 1 is placed on an examination bed, and a chest coil (not shown) is disposed within the fixation plate 1. The examination bed, fixation plate 1, ECG-gated patch, and chest coil are all prior art and will not be described in detail in this embodiment. A detection plate 2 is detachably connected to the fixation plate 1. The detection plate 2 is provided with a breathing training component for applying chest pressure. The breathing training component includes an inflatable bladder 21 and a pressure sensor 22. The breathing training component is electrically connected to a control panel (not shown), and the control panel is electrically connected to a voice module (not shown). In this embodiment, the voice module is a broadcast system of an existing examination room. The pressure sensor 22 is used to measure the pressure data generated by the patient's natural breathing. The control panel records and plots a fluctuation curve based on the pressure data, and then obtains the patient's breathing interval based on the fluctuation curve. A breath-holding reminder command is sent to the voice module according to the breathing interval. In this embodiment, the two sides of the fixing plate 1 and the detection plate 2 are arc-shaped. The arc-shaped fixing plate 1 and the detection plate 2 conform to the curve of the chest, which improves the stability of the fixing plate 1 and the detection plate 2 during installation, reduces the attenuation of the wireless signal received by the chest coil in the fixing plate 1, and thus improves the stability of the electrocardiogram signal.

[0041] The breathing training component includes an inflatable bladder 21 fixedly connected to the detection plate 2. The inflatable bladder 21 is located at the end of the detection plate 2 that extends out of the fixed plate 1. The inflatable bladder 21 is connected to a pneumatic component via a trachea. In this embodiment, the pneumatic component is an air compressor. The pneumatic component is electrically connected to the control panel, which is located inside the detection plate 2. The pressure sensor 22 is located on the side of the inflatable bladder 21 away from the detection plate 2. The control panel is used to use the fluctuation curve when the fluctuation curve shows regular changes as a reference curve, calculate the time interval between the peaks and troughs in the reference curve, and use the time interval as the patient's breathing interval.

[0042] Next, the breathing interval is compared with the normal breathing interval of a healthy person. If the breathing interval is less than the normal breathing interval, a reminder command is sent to the outside. At the same time, the breath-holding time is adjusted according to the difference between the breathing interval and the normal breathing interval. In this embodiment, the outside is the liquid crystal display panel or computer processor in the detection room. The reduction or increase of the breath-holding time based on the breathing interval and the normal breathing interval is existing technology and will not be described in detail in this embodiment. Then, a corresponding breath-holding reminder command is generated based on the adjusted breath-holding time and sent to the voice module. If the breathing interval is greater than or equal to the normal breathing interval, a pre-recorded breath-holding reminder command is sent to the voice module according to the normal breathing interval.

[0043] For example, while a normal person can maintain a breath-hold for 10-20 seconds with voice prompts, children, due to their limited cognitive development, may not be able to do so. For some patients accustomed to short, rapid breathing, prolonged breath-holding may be difficult to adjust in a short time, leading to discomfort during the process and potentially causing a mismatch between the breath-holding time and the imaging sequence during the examination. Therefore, active adjustment of the breath-holding time is necessary. Furthermore, for elderly patients or those with heart failure, the decline in respiratory function prevents them from holding their breath for extended periods. Therefore, appropriate reminders are provided to allow physicians to adjust their scanning strategies, proactively shorten the scanning time, and reduce motion artifacts.

[0044] The detection plate 2 has several electrocardiogram (ECG) monitoring electrode pads 3 on the side away from the fixed plate 1 for detecting the strength of the heartbeat signal. The ECG monitoring electrode pads 3 are connected to an ECG monitor via wires. The detection plate 2 also has several moving blocks 33 on the side away from the fixed plate 1 that correspond to the ECG monitoring electrode pads 3. The detection plate 2 is equipped with a drive mechanism that moves the moving blocks 33 within a range.

[0045] The driving mechanism includes a movable cavity opened on the detection plate 2. Several push bladders 31 are slidably fitted inside the movable cavity. The movable block 33 is located at the center of the movable cavity, and the push bladders 31 are arranged in a ring around the movable block 33. One side of the push bladder 31 is fixedly connected to the movable block 33.

[0046] A pneumatic actuator 32 is slidably fitted inside the movable block 33. The air inlet end of the pneumatic actuator 32 is connected to the pneumatic component through an air pipe. In this embodiment, the pneumatic component is an air compressor. The output end of the pneumatic actuator 32 is detachably connected to the electrocardiogram monitoring electrode 3.

[0047] The specific implementation process is as follows:

[0048] Before performing cardiac magnetic resonance imaging (MRI), the detection plate 2 is mounted on the fixed plate 1 equipped with a chest coil. This ensures that the breathing training component and ECG monitoring electrode 3 on the detection plate 2 remain in constant contact with the chest skin. This allows for confirmation of the strength of ECG signals at different locations on the chest via the ECG monitoring electrode 3, thereby improving the accuracy of subsequent ECG-gated patch detection. Simultaneously, the ECG monitoring electrode 3 simulates the pressure changes of the breathing training component during the acquisition process. This pressure change allows the patient to intuitively adjust their breathing rate, facilitating accurate matching of the patient's breath-holding timing with the imaging sequence during subsequent cardiac MRI, and reducing the occurrence of respiratory artifacts.

[0049] During use, disposable ECG monitoring electrode pads 3 are installed at the output end of the pneumatic push rod 32. The surface of the ECG monitoring electrode pads 3 is non-adhesive. During the movement of the ECG monitoring electrode pads 3, the extension and retraction of the pneumatic push rod 32 allows the ECG monitoring electrode pads 3 to be hidden inside the moving block 33. The circumferentially arranged push bag 31 pushes the moving block 33 to adjust the contact position between the pneumatic push rod 32 and the chest cavity surface. The pneumatic push rod 32 pushes the ECG monitoring electrode pads 3 to make close contact with the chest skin surface, thereby ensuring the accuracy of the data collected by the ECG monitoring electrode pads 3. The ECG monitoring electrode pads 3 are used to obtain signal quality at different chest contact positions. In this embodiment, the RA and LA electrode pads near the arms are measured by external fixation. The other electrode pads near the sternum (such as LL, RL, C or V electrode pads) are adjusted in position by a drive mechanism. The drive mechanism drives the ECG monitoring electrode pads 3 on the moving block 33 to adjust their position, thereby adapting to the subtle differences in the chest cavity surface and the position of the heart in the body of different patients. This ensures the accuracy of capturing the weak ECG signals generated by the heartbeat through the ECG gating patch and ensures the subsequent cardiac magnetic resonance imaging.

[0050] The respiratory training component guides the patient's breathing to train breath-holding, facilitating breath-holding control. A voice module then provides prompts for the patient to perform self-breathing and breath-holding. Based on the pressure data generated by the patient's self-breathing, the system determines the accuracy of the patient's breath-holding timing. This guided training assists the patient in controlling breath-holding, achieving accurate matching between the patient's breath-holding timing and the imaging sequence, reducing respiratory artifacts, and ensuring the smooth execution of subsequent cardiac MRI.

[0051] Example 2:

[0052] The difference from Embodiment 1 is that the breathing training component also includes a laryngeal patch, and the pressure sensor 22 is also located on the laryngeal patch.

[0053] The specific implementation process is as follows: The pressure sensor 22 on the laryngeal patch acquires the laryngeal movement during the patient's breathing process during inhalation or exhalation, so as to establish the fluctuation curve more quickly and accurately, thereby improving the detection efficiency.

[0054] Example 3:

[0055] The difference from Embodiment 2 is that the control panel is also used to send a start command to the pneumatic component based on the breath-holding reminder command corresponding to the current breathing interval, obtain the pressure data after the breath-holding reminder command, compare the pressure data with the recorded value, if the pressure data is greater than the recorded value, then obtain the breath-holding time recorded at the current time, and then compare the breath-holding time with the breathing interval. If the breath-holding time is greater than or equal to the breathing interval, then send a training normal command to the outside; if the breath-holding time is less than the breathing interval, then send a training abnormal command to the outside; if the pressure data is less than the recorded value, then record the breath-holding time.

[0056] For example, based on changes in the patient's respiratory rate, the inflation bag 21 is pressurized according to the respiratory interval to obtain pressure data, reminding the patient to maintain breath-holding. By recording the respiratory changes when the patient switches breath-holding states, the breath-holding time is recorded to determine whether the patient has met the breath-holding training effect. The physician is reminded to assist the patient in maintaining breath-holding training.

[0057] Example 4:

[0058] The difference from Embodiment 3 is that the control panel is also used to record the number of training abnormalities when the breath-holding time is greater than or equal to the breathing interval. Within a set comparison time, the number of training abnormalities is compared with a set abnormal value. If the number of training abnormalities is greater than the abnormal value, an alert command is sent to the outside world; if the number of training abnormalities is less than the abnormal value, a standby command is sent to the outside world.

[0059] For example, by recording the number of abnormal training sessions, it can be determined whether the current breath-holding time matches the patient's breath-holding status, thereby providing appropriate reminders and ensuring the effectiveness of the breath-holding training process. This helps patients control their breathing and breath-holding, while also adjusting the breath-holding time to facilitate accurate matching between the patient's breathing and breath-holding timing and the imaging sequence.

[0060] Example 5:

[0061] The difference from Embodiment 4 is that the moving block 33 has a marking cavity, and a marking rod 4 is slidably fitted inside the marking cavity. One end of the marking rod 4 is fixedly connected to a piston, and the piston is slidably fitted with the marking cavity. The marking cavity is connected to the pneumatic component through an air pipe, and a first solenoid valve is provided at the connection between the marking cavity and the air pipe. The normal state of the first solenoid valve is normally closed, and the first solenoid valve is electrically connected to the control panel.

[0062] When the piston on the marker rod 4 is at the lowest point of the marking chamber, the marker rod 4 is outside the moving block 33.

[0063] The specific implementation process is as follows: When the push bag 31 pushes the moving block 33 to a suitable ECG detection point, the control panel controls the connection of the first solenoid valve, so that the pneumatic component continuously delivers gas to the marking chamber through the air pipe. The increased air pressure in the marking chamber pushes the piston to extend the marking rod 4 out of the moving rod. The moving rod generates local pressure on the body surface, thereby forming a position mark, which facilitates the subsequent placement of the ECG gating patch.

[0064] Example 6:

[0065] The difference from Embodiment 5 is that both the detection plate 2 and the fixing plate 1 have windows 11, and a baffle plate 12 is detachably connected to the window 11. The expansion bladder 21 is divided into a partition (not shown in the figure) to divide the expansion bladder 21 into a first chamber and a second chamber. The first chamber is located above the partition and is used to store disinfectant. The second chamber is used to store air. The expansion bladder 21 corresponding to the first chamber is a fixed layer, and the expansion bladder 21 corresponding to the second chamber is a deformable layer. A second solenoid valve and a one-way valve are connected on the partition. The second solenoid valve is normally closed, and the one-way valve can only allow air in the second chamber to flow into the first chamber.

[0066] The detection plate 2 has several spray holes 23 on both sides. The spray holes 23 are connected to the first chamber of the expansion bladder 21 through the air tube. A pressure valve (not shown in the figure) is provided between the spray holes 23 and the expansion bladder 21. An injection hole (not shown in the figure) is connected to the expansion bladder 21. The injection hole is connected to the first chamber and is provided with a plug.

[0067] The specific implementation process is as follows: The shield 12 is removed and replaced at the window 11 to accommodate the needs of different patients, such as the extended placement of the breasts in women. This reduces the pressure on the breasts from the traditional flat fixing plate 1, thereby reducing the pressure on the heart and facilitating natural heart contraction, thus ensuring image quality.

[0068] The injection hole is opened by manually pulling or moving the plug, and the disinfectant is injected into the first chamber inside the expansion bladder 21 through a syringe or water pipe. After the disinfectant injection is completed, the plug is closed, and the connection or closure of the first chamber and the second chamber is controlled by the solenoid valve on the partition.

[0069] When the solenoid valve is activated, the gas inside the second chamber enters the first chamber due to the pressure difference, increasing the pressure inside the first chamber. Due to the one-way valve, the gas inside the second chamber is prevented from flowing back into the first chamber. The increased pressure in the second chamber overcomes the limitation of the pressure valve, allowing the gas to carry the disinfectant along the air tube to the spray hole 23. The disinfectant sprayed through the spray hole 23 disinfects the area around the detection plate 2 and the fixed plate 1, thereby reducing the bacterial content on the fixed plate 1 and the detection plate 2, thus reducing the risk of contact infection between different patients and facilitating continuous use of the device.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A cardiac magnetic resonance imaging (MRI) device, comprising a fixation plate (1) placed on a patient's chest and an ECG-gated patch for adhesion to the surface of the chest, the fixation plate (1) being placed on an examination bed, and a chest coil being disposed within the fixation plate (1); characterized in that, A detection plate (2) is detachably connected to the fixed plate (1). The detection plate (2) is equipped with a breathing training component for applying chest pressure. The breathing training component includes an inflatable bladder (21) and a pressure sensor (22). The breathing training component is electrically connected to a control panel, and the control panel is electrically connected to a voice module. The pressure sensor (22) is used to measure the pressure data generated by the patient's natural chest breathing. The control panel records and plots a fluctuation curve based on the pressure data, and then obtains the patient's breathing interval based on the fluctuation curve. The control panel sends a breath-holding reminder command to the voice module according to the breathing interval. The detection plate (2) is provided with several electrocardiogram monitoring electrode pads (3) on the side away from the fixed plate (1) for detecting the strength of the heartbeat signal. The detection plate (2) is provided with several moving blocks (33) corresponding to the electrocardiogram monitoring electrode pads (3) on the side away from the fixed plate (1). The detection plate (2) is provided with a drive mechanism that drives the moving blocks (33) to move within a range. The breathing training component includes an inflatable bladder (21) fixedly connected to the detection plate (2). The inflatable bladder (21) is located at one end of the detection plate (2) that extends out of the fixed plate (1). The inflatable bladder (21) is connected to a pneumatic component through a trachea. The pneumatic component is electrically connected to the control panel. The pressure sensor (22) is located on the side of the inflation bladder (21) away from the detection plate (2). The control panel is used to use the fluctuation curve when the fluctuation curve shows regular changes as the reference curve, calculate the time interval between the peak and the trough in the reference curve, and use the time interval as the patient's breathing interval. The breathing interval is then compared with the normal breathing interval of a normal person. If the breathing interval is less than the normal breathing interval, a reminder command is sent to the outside world. At the same time, the breath-holding time is adjusted according to the difference between the breathing interval and the normal breathing interval. Then, a corresponding breath-holding reminder command is generated based on the adjusted breath-holding time and sent to the voice module. If the breathing interval is greater than or equal to the normal breathing interval, a pre-recorded breath-holding reminder command is sent to the voice module according to the normal breathing interval. The control panel is also used to send a start command to the pneumatic components based on the breath-holding reminder command corresponding to the current breathing interval, obtain the pressure data after the breath-holding reminder command, compare the pressure data with the recorded value, if the pressure data is greater than the recorded value, obtain the breath-holding time recorded at the current time, and then compare the breath-holding time with the breathing interval. If the breath-holding time is greater than or equal to the breathing interval, a training normal command is sent to the outside; if the breath-holding time is less than the breathing interval, a training abnormal command is sent to the outside; if the pressure data is less than the recorded value, the breath-holding time is recorded.

2. The cardiac magnetic resonance imaging (MRI) device according to claim 1, characterized in that, The two sides of the fixing plate (1) and the detection plate (2) are arc-shaped.

3. The cardiac magnetic resonance imaging (MRI) device according to claim 2, characterized in that, The breathing training component also includes a laryngeal patch, on which a pressure sensor (22) is also located.

4. The cardiac magnetic resonance imaging (MRI) device according to claim 3, characterized in that, The driving mechanism includes a moving cavity opened on the detection plate (2), a number of push bladders (31) are slidably fitted in the moving cavity, the moving block (33) is located at the center of the moving cavity, and the push bladders (31) are arranged in a ring around the moving block (33), and one side of the push bladder (31) is fixedly connected to the moving block (33). A pneumatic actuator (32) is slidably fitted inside the movable block (33). The air inlet of the pneumatic actuator (32) is connected to the pneumatic component through an air pipe. The output end of the pneumatic actuator (32) is detachably connected to the electrocardiogram monitoring electrode (3).

5. The cardiac magnetic resonance imaging (MRI) device according to claim 4, characterized in that, The control panel is also used to record the number of training abnormalities when the breath-holding time is greater than or equal to the breathing interval. Within a set comparison time, the number of training abnormalities is compared with a set abnormal value. If the number of training abnormalities is greater than the abnormal value, an alert command is sent to the outside world; if the number of training abnormalities is less than the abnormal value, a standby command is sent to the outside world.

6. The cardiac magnetic resonance imaging (MRI) device according to claim 5, characterized in that, The movable block (33) has a marking cavity, and a marking rod (4) is slidably fitted inside the marking cavity. One end of the marking rod (4) is fixedly connected to a piston, and the piston is slidably fitted with the marking cavity. The marking chamber is connected to the pneumatic component via an air pipe, and a first solenoid valve is installed at the connection between the marking chamber and the air pipe. The first solenoid valve is electrically connected to the control panel. When the piston on the marker rod (4) is at the lowest point of the marker chamber, the marker rod (4) is outside the moving block (33).

7. The cardiac magnetic resonance imaging (MRI) device according to claim 6, characterized in that, Both the detection plate (2) and the fixing plate (1) have windows (11), and a shield (12) is detachably connected to the window (11).

8. The cardiac magnetic resonance imaging (MRI) device according to claim 7, characterized in that, The expansion bladder (21) is divided into a partition, which is used to divide the expansion bladder (21) into a first chamber and a second chamber. The first chamber is located above the partition and is used to store disinfectant. The second chamber is used to store air. The expansion bladder (21) corresponding to the first chamber is a fixed layer, and the expansion bladder (21) corresponding to the second chamber is a deformable layer. A second solenoid valve and a one-way valve are connected on the partition. The detection plate (2) has several spray holes (23) on both sides. The spray holes (23) are connected to the first chamber of the expansion bladder (21) through the air tube. A pressure valve is provided between the spray holes (23) and the expansion bladder (21). An injection hole is connected to the expansion bladder (21). The injection hole is connected to the first chamber. A plug is provided on the injection hole.

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