A vehicle-mounted ultra-low-field brain magnetic resonance imaging system specifically for stroke

Abstract

The present invention discloses a vehicle-mounted, ultra-low-field brain magnetic resonance imaging system specifically designed for stroke, which relates to the field of medical magnetic resonance imaging and includes a carriage body, a stretcher disposed within the carriage body, a wheel body connected to the bottom end of the stretcher, a magnetic resonance magnet unit disposed at one end within the carriage body, an equipment cabinet mounted above the magnetic resonance magnet unit, and two chutes disposed at the bottom end of the carriage body, spaced equidistant from the wheel body. The two chutes are parallel to each other, and both have internal locking structures for sliding against the wheel body. The present invention uses a dedicated ultra-low-field brain magnetic resonance imaging system to directly travel to the patient's residence for stroke diagnosis, thereby buying valuable time for the treatment of acute stroke. A clamping structure is designed within the ambulance to clamp the stretcher wheel, allowing the patient's head to enter the magnetic resonance magnet unit more smoothly and accurately as the stretcher continues to move forward.

Description

Technical Field

[0001] The present invention relates to the field of magnetic resonance imaging, and in particular to a vehicle-mounted ultra-low field brain magnetic resonance imaging system dedicated to stroke. Background Art

[0002] Stroke, commonly known as stroke, is one of the main causes of death and disability among adults in my country. It is characterized by high incidence, high recurrence rate, high mortality rate and high disability rate.

[0003] Stroke includes ischemic stroke (cerebral infarction) and hemorrhagic stroke (cerebral hemorrhage). Ischemic stroke accounts for approximately 80% of all strokes. The treatment of acute stroke is highly time-dependent. For example, the key to treating ischemic stroke is active intravenous thrombolysis within 3.0-4.5 hours of onset to achieve recanalization of the infarcted blood vessels. Therefore, 4.5 hours is also known as the golden window for stroke treatment.

[0004] The main challenge in achieving early thrombolysis is ruling out hemorrhagic stroke. If intravenous thrombolysis is misused in patients with hemorrhagic stroke, it can cause further hematoma expansion and worsen the patient's condition. However, the early symptoms and signs of both types of stroke are quite similar. Currently, clinical practice relies primarily on multimodal cranial imaging (such as plain CT scans, CTA, and CTP) to differentiate early stroke types, rule out hemorrhagic stroke, and achieve early, risk-free thrombolysis.

[0005] However, existing imaging equipment and radiation protection devices are relatively bulky and difficult to maneuver, often located within hospitals. Currently, the only pre-hospital diagnostic tool for stroke is a mobile CT vehicle, which is bulky and heavy, making it difficult to navigate residential areas and, therefore, hindering widespread use. Furthermore, the time consuming patient transport to the hospital can cause acute stroke patients to miss the optimal time window for thrombolysis.

[0006] After the patient is lifted onto the vehicle, the vehicle-mounted stretcher is mostly guided by two sets of parallel track structures to enable it to slide in a preset direction, thereby allowing the patient's head to remain in the center position of the magnetic resonance imaging device and enter the magnetic resonance imaging device to improve imaging quality. Since the inner wall of the existing track structure needs to maintain a certain gap with the wheels so that the wheels of the stretcher can slide well into the track, and during the driving of the ambulance, due to the existence of the above-mentioned gap, the stretcher is very likely to shake in a direction orthogonal to the sliding direction, and severe shaking can easily cause secondary injuries to the patient.

[0007] In summary, existing ambulances for stroke patients cannot seize the best rescue opportunity, and are not easy to perform smooth inspections during the process of transporting patients. Summary of the Invention

[0008] Based on this, the purpose of the present invention is to provide a vehicle-mounted ultra-low field brain magnetic resonance imaging system dedicated to stroke, so as to solve the technical problems that existing ambulances for stroke patients cannot seize the best rescue time and are difficult to conduct smooth examinations during the process of transporting patients.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a vehicle-mounted stroke-specific ultra-low-field cranial magnetic resonance imaging system, comprising a carriage body, a stretcher trolley is provided in the carriage body, the bottom end of the stretcher trolley is connected to a wheel body, a magnetic resonance magnet unit is provided at one end of the carriage body, an equipment cabinet is installed above the magnetic resonance magnet unit, the equipment cabinet is connected to a communication cabinet arranged on the outer wall of the carriage body through a signal line, two slide grooves with equal spacing from the wheel body are provided at the bottom end of the carriage body, the two slide grooves are parallel to each other, and both have a locking structure for the wheel body slidingly provided inside, the magnetic resonance magnet unit is provided with a vehicle-mounted magnetic resonance magnet, a gradient coil, a transmitting coil, and a receiving coil, the equipment cabinet includes a control unit for the vehicle-mounted magnetic resonance magnet, gradient coil, transmitting coil, and receiving coil, the communication cabinet includes 5GCPE and a 5G switch, and the function of the communication cabinet is to realize the remote transmission of magnetic resonance equipment scanning images and vital signs, as well as remote consultation and guidance by hospital doctors.

[0010] By adopting the above technical solution, a dedicated ultra-low-field cranial magnetic resonance imaging system can be driven directly to the residence of community patients for stroke diagnosis, which can effectively reduce the time of patient transportation, and can quickly and accurately identify whether the patient has intracranial hemorrhage or infarction, thereby buying precious time for the treatment of acute stroke. A clamping structure for clamping the stretcher wheels is designed in the ambulance, and the clamping structure is set in the sliding track. The clamping structure automatically locks the wheels of the stretcher after the stretcher wheels slide to the specified position, so that the patient's head can enter the magnetic resonance equipment more smoothly and accurately while continuing to push forward.

[0011] The present invention is further configured such that a guide platform with a Y-shaped structure is provided at one end of each of the two sliding grooves on the bottom surface of the carriage body.

[0012] By adopting the above technical solution, the stretcher can slide into the predetermined track more conveniently, thus gaining a lot of time when rescuing patients.

[0013] The present invention is further configured such that a fixed platform is slidingly provided in both of the sliding grooves, a fixed plate with a V-shaped structure is rotatably connected above one end of the fixed platform, a locking tongue structure is provided on one side of the fixed platform, and a locking tongue that cooperates with the locking tongue structure is provided on one side of the fixed plate.

[0014] By adopting the above technical solution, the wheel body continues to move due to inertia after rolling into the fixing plate, and at the same time the locking tongue structure cooperates with the latch tongue to lock the fixing plate.

[0015] The present invention is further configured such that both sides of the fixing plate are provided with outwardly inclined blocking strip structures.

[0016] By adopting the above technical solution, the barrier structure can prevent the wheel body from moving laterally in the fixing plate.

[0017] The present invention is further configured such that an inclined bearing platform is provided in the slide groove on a side close to the guide platform.

[0018] By adopting the above technical solution, the bearing platform is used to bear the tilted fixing plate, which facilitates the next use of the locking structure.

[0019] The present invention is further configured such that when the latch tongue cooperates with the locking tongue structure, the axis height of the wheel body on the fixing plate is the same as that on the inner bottom surface of the carriage body, and an unlocking structure for contacting the latch tongue and cooperating with the locking tongue structure is provided in the fixing platform. When the fixing platform slides toward the guide platform to the extreme position, the unlocking structure is triggered to unlock the cooperation between the latch tongue and the locking tongue structure, and after the fixing plate rotates, it contacts one end of the guide platform and at the same time contacts the top surface of the supporting platform.

[0020] By adopting the above technical solution, after the wheel body of the stretcher is locked by the locking structure in the slide groove, the stretcher can slide more smoothly and is less likely to tilt.

[0021] The present invention is further configured such that a telescopic headrest is provided at the front end of the stretcher.

[0022] By adopting the above technical solution, the patient's head can be extended to facilitate entry into the magnetic scanning area.

[0023] The present invention is further configured such that all six sides of the carriage body are paved with non-magnetic metal partitions.

[0024] By adopting the above technical solution, the non-magnetic conductive metal is used to shield external electromagnetic interference, so that the magnetic resonance equipment in the magnetic resonance magnet unit can better perform magnetic resonance examinations on patients.

[0025] The present invention is further configured such that a plurality of groups of high-definition cameras are installed in the carriage body at positions facing the stretcher.

[0026] By adopting the above technical solution, multiple sets of high-definition cameras are used in conjunction with the communication equipment in the equipment cabinet to report the patient's real-time condition to the hospital so that the hospital can prepare quickly.

[0027] The present invention is further configured such that the stretcher trolley is made of non-magnetic material, and the connecting parts on the trolley body are all made of non-magnetic material.

[0028] By adopting the above technical solution, it is avoided that the imaging quality of the magnetic resonance equipment is affected when the stretcher is extended into the magnetic resonance equipment.

[0029] In summary, the present invention mainly has the following beneficial effects:

[0030] 1. The present invention uses a dedicated ultra-low-field cranial magnetic resonance imaging system that can be driven directly to the homes of community patients for stroke diagnosis, effectively reducing patient transportation time and enabling rapid and accurate identification of intracranial hemorrhage or infarction, thereby buying valuable time for the treatment of acute stroke.

[0031] 2. The present invention designs a clamping structure for clamping the stretcher wheels in the ambulance, and sets the clamping structure in the sliding track. The clamping structure automatically locks the wheels of the stretcher after the stretcher wheels slide to a specified position, so that the patient's head can enter the magnetic resonance imaging device more smoothly and accurately during the stretcher's forward movement. At the same time, the stretcher can reduce shaking during the patient's transportation, thereby reducing the damage to the patient caused by shaking.

[0032] 3. The present invention provides a sliding groove structure embedded in the floor of the carriage body, and a wheel limiting structure is slidably provided in the sliding groove structure, so that the floor inside the carriage is smoother. Compared with the traditional stretcher guide rail, the present invention greatly improves the flatness of the floor inside the carriage while ensuring the stable guidance of the stretcher, which is conducive to the sliding transfer of other auxiliary treatment equipment in the carriage and also facilitates the movement of people in the carriage.

[0033] 4. By installing stroke examination equipment and communication equipment connected to the hospital in the ambulance, the present invention breaks the previous treatment model of first sending stroke patients to the hospital, then undergoing examination and thrombolysis. By using the vehicle-mounted stroke-specific ultra-low-field cranial magnetic resonance imaging system, the first aid steps for stroke are advanced to the pre-hospital stage. Scanning and diagnosis can be carried out in time before the patient arrives at the hospital, and emergency treatment can be taken in a timely manner, thus winning the golden time for treatment.

[0034] 5. The present invention adopts a remote consultation system, and in-hospital doctors provide guidance through voice and video remote consultation, synchronize patient information in real time, and prepare for the patient's surgery in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A top perspective view of the present invention;

[0036] Figure 2 is a rear perspective view of the present invention;

[0037] Figure 3A three-dimensional diagram of the fixing structure of the present invention;

[0038] Figure 4 For the present invention Figure 3 A magnified view of middle A;

[0039] Figure 5 This is a three-dimensional diagram of the fixed state of the fixing structure of the present invention;

[0040] Figure 6 For the present invention Figure 5 Enlarged view of middle B;

[0041] Figure 7 This is a three-dimensional diagram of the fixed state of the fixing platform of the present invention;

[0042] Figure 8 This is a front view of the interior of the fixing platform of the present invention;

[0043] Figure 9 This is a front view of the interior of the fixing platform of the present invention in the unlocked state;

[0044] Figure 10 is a diagram of the imaging information transmission system of the present invention;

[0045] Figure 11 This is a front view of the interior of the locking structure at the end of the chute of the present invention.

[0046] In the figure: 1. Carriage body; 2. Stretcher; 3. Magnetic resonance magnet unit; 4. Equipment cabinet; 5. Communication cabinet; 6. Bottom plate; 7. Slide; 8. Wheel body; 9. Guide platform; 10. Guide strip; 11. Fixing platform; 12. Fixing box; 13. Fixing plate; 14. Tongue; 15. Telescopic tongue; 16. Telescopic box; 17. Unlocking platform; 18. Carrying platform; 19. Foot switch; 20. Lever lock tongue; 21. Bayonet. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0048] The following describes an embodiment of the present invention based on its overall structure.

[0049] Example 1:

[0050] A vehicle-mounted ultra-low field brain magnetic resonance imaging system for stroke, such as Figure 1-10As shown, it includes a carriage body 1, a stretcher 2 is arranged in the carriage body 1, the bottom end of the stretcher 2 is connected to the wheel body 8, a magnetic resonance magnet unit 3 is arranged at one end of the carriage body 1, an equipment cabinet 4 is installed above the magnetic resonance magnet unit 3, the equipment cabinet 4 is connected to the communication cabinet 5 arranged on the outer wall of the carriage body 1 through a signal line, a bottom plate 6 is arranged at the bottom end of the carriage body 1, two slide grooves 7 with equal spacing from the wheel body 8 are arranged on the bottom plate 6, the two slide grooves 7 are parallel to each other, and a locking structure for the wheel body 8 is slidingly arranged inside, the magnetic resonance magnet unit 3 is provided with a vehicle-mounted magnetic resonance magnet, a gradient coil, a transmitting coil, and a receiving coil, the equipment cabinet 4 includes a control unit for the vehicle-mounted magnetic resonance magnet, gradient coil, transmitting coil, and receiving coil, the communication cabinet 5 includes 5GCPE and a 5G switch, and the function of the communication cabinet 5 is to realize the remote transmission of magnetic resonance equipment scanning images and vital signs, as well as remote consultation guidance by hospital doctors.

[0051] Patient images from the vehicle-mounted, ultra-low-field cranial magnetic resonance imaging system for stroke treatment, real-time images from the HD camera, and the patient's dynamic physiological parameters from other auxiliary medical equipment are transmitted via a 5G switch to the 5G CPE. The 5G CPE wirelessly connects to the base station, the base station connects to the wide area network, and the hospital network connects to the wide area network. The doctor's computer accesses the patient's dynamic physiological parameters, scanned images, and facial expressions through the hospital network. Expert doctors within the hospital can engage in video and voice conversations with the accompanying doctor to share patient information and provide remote guidance, while also preparing for surgery after admission.

[0052] On the basis of the above structure, in this embodiment, a Y-shaped guide platform 9 is provided at one end of the two slide grooves 7 on the bottom surface of the carriage body 1, so that the stretcher 2 can slide into the predetermined track more conveniently, thereby saving a lot of time when rescuing patients.

[0053] On the basis of the above structure, in this embodiment, a fixed platform 11 is slidably provided in each of the two slide grooves 7, and a guide bar 10 is also provided in the slide groove 7 to guide the fixed platform 11, so that the sliding of the fixed platform 11 is more stable, and a fixed plate 13 with a V-shaped structure is rotatably connected above one end of the fixed platform 11, and a locking tongue structure is provided on one side of the fixed platform 11, and a tongue 14 that cooperates with the locking tongue structure is provided on one side of the fixed plate 13, so that the wheel body 8 continues to move due to inertia after rolling into the fixed plate 13, and at the same time, the locking tongue structure can cooperate with the tongue 14 to lock the fixed plate 13.

[0054] Outwardly inclined blocking strips are provided on both sides of the fixing plate 13 , and the blocking strips can prevent the wheel body 8 from moving laterally within the fixing plate 13 .

[0055] On the basis of the above structure, in this embodiment, an inclined supporting platform 18 is provided in the slide groove 7 on one side close to the guide platform 9. The supporting platform 18 is used to support the inclined fixing plate 13 to facilitate the next use of the locking structure.

[0056] When the locking plate 11 is unlocked, the spring on the back of the unlocking plate 17 pushes it back to the original position, and the retractable tongue 15 slides down at the same time to complete the unlocking.

[0057] In order to prevent external electromagnetic interference, the six sides of the carriage body 1 are all paved with non-magnetic metal partitions. The non-magnetic metal is used to shield external electromagnetic interference, so that the magnetic resonance equipment in the magnetic resonance magnet unit 3 can better perform magnetic resonance examinations on patients.

[0058] On the basis of the above structure, in this embodiment, when the latch tongue 14 cooperates with the locking tongue structure, the axis height of the wheel body 8 on the fixed plate 13 is the same as that on the bottom surface of the carriage body 1, and an unlocking structure for contacting the latch tongue 14 and cooperating with the locking tongue structure is provided in the fixed platform 11. When the fixed platform 11 slides toward the guide platform 9 to the extreme position, the unlocking structure is triggered to unlock the cooperation between the latch tongue 14 and the locking tongue structure. After the fixed plate 13 rotates, it contacts one end of the guide platform 9 and at the same time contacts the top surface of the load-bearing platform 18, so that after the wheel body 8 of the stretcher trolley 2 is locked by the locking structure in the slide groove 7, the sliding process is more stable and less likely to tilt.

[0059] On the basis of the above structure, in this embodiment, the stretcher trolley 2 is made of non-magnetic material, and the connecting parts on the body are all made of non-magnetic material, so as to avoid affecting the imaging quality of the magnetic resonance equipment when the stretcher trolley 2 is extended into the magnetic resonance equipment.

[0060] This embodiment further provides a stretcher trolley 2 with a retractable headrest at the front end thereof, for extending the patient's head to facilitate entry into the magnetic scanning area.

[0061] Based on the above structure, in this embodiment, multiple sets of high-definition cameras are installed in the carriage body 1 facing the stretcher 2. Through the multiple sets of high-definition cameras and the communication equipment in the equipment cabinet 4, the patient's real-time condition is reported to the hospital so that the hospital can prepare quickly.

[0062] When providing first aid to a patient, the ambulance rushes to the scene after receiving the emergency call, uses the stretcher 2 to transfer the patient, adjusts the retractable headrest on the stretcher 2 according to the patient's height, pushes the stretcher 2 to align the patient's head with the center area of ​​the magnetic scanning, and performs an MRI scan. The in-hospital doctor conducts remote guidance diagnosis through the remote consultation system, or the accompanying doctor conducts on-site diagnosis. After the disease is confirmed, the corresponding treatment measures are taken in time. During the transfer process, the remote consultation system transmits the patient's vital signs information in real time, and the in-hospital doctor can prepare the connection treatment plan in advance.

[0063] Example 2:

[0064] A vehicle-mounted ultra-low field brain magnetic resonance imaging system for stroke, such as Figure 11 As shown, this embodiment is different from the first embodiment in that, further, a fixing structure for the fixing platform 11 is provided at the end of the slide groove 7 .

[0065] On the basis of the above structure, in this embodiment, specifically, the end of the slide groove 7 is provided with a pedal switch 19 for sliding up and down, and the top of the pedal switch 19 extends upward from the bottom plate 6. The slide groove 7 is also provided with a lever lock tongue 20 at the extreme position of the sliding of the fixed platform 11. The fixed platform 11 is provided with a bayonet 21 at one end facing the lever lock tongue 20. One end of the lever lock tongue 20 contacts the bottom of the pedal switch 19, and a return spring is connected below the end contacting the bottom of the pedal switch 19. The other end of the lever lock tongue 20 is provided with a card joint portion that matches the bayonet 21. By setting the above structure, when the fixed platform 11 slides to the end of the slide groove 7, the lever lock tongue 20 can lock the fixed platform 11 to prevent it from continuing to slide. When the fixed platform 11 needs to be unlocked, it is only necessary to step on the pedal switch 19.

[0066] The present invention creatively uses a vehicle-mounted magnetic resonance magnet, gradient coil, transmitting coil, and receiving coil, and at the same time designs a track structure that stably allows the stretcher to extend into the vehicle-mounted magnetic resonance magnet, gradient coil, transmitting coil, and receiving coil, thereby avoiding the shortcomings of existing ambulances for stroke patients that cannot seize the best rescue opportunity and are difficult to conduct smooth examinations during the process of transporting patients. In this solution, a dedicated ultra-low-field cranial magnetic resonance imaging system can be used to drive directly to the residence of community patients for stroke diagnosis, which can effectively reduce the patient transportation time and can quickly and accurately identify whether the patient has intracranial hemorrhage or infarction, thereby gaining precious time for the treatment of acute stroke. A clamping structure for clamping the stretcher wheels is designed in the ambulance, and the clamping structure is set in the sliding track. The clamping structure automatically locks the wheels of the stretcher after the stretcher wheels slide to the specified position, so that the patient's head can enter the magnetic resonance equipment more stably and accurately while continuing to push forward.

[0067] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A vehicle-mounted stroke-specific ultra-low field cranial magnetic resonance imaging system, comprising a carriage body (1), a stretcher (2) disposed within the carriage body (1), and a wheel body (8) connected to the bottom end of the stretcher (2), characterized in that: A magnetic resonance magnet unit (3) is provided at one end of the carriage body (1), and an equipment cabinet (4) is installed above the magnetic resonance magnet unit (3). The equipment cabinet (4) is connected to a communication cabinet (5) provided on the outer wall of the carriage body (1) through a signal line. Two slide grooves (7) with equal spacing to the wheel body (8) are provided at the bottom end of the carriage body (1). The two slide grooves (7) are parallel to each other, and both of them are provided with a locking structure for the wheel body (8) for sliding. The magnetic resonance magnet unit (3) is provided with a vehicle-mounted magnetic resonance magnet, a gradient coil, a transmitting coil, and a receiving coil. The equipment cabinet (4) includes a control unit for the vehicle-mounted magnetic resonance magnet, the gradient coil, the transmitting coil, and the receiving coil. The communication cabinet (5) includes a 5GCPE and a 5G switch. The function of the communication cabinet (5) is to realize the remote transmission of the scanning images and vital signs of the magnetic resonance equipment, as well as the remote consultation guidance of the hospital doctors. The two slide grooves (7) are both provided with a fixed structure for sliding. The fixing platform (11) is provided with a V-shaped fixing plate (13) rotatably connected to one end of the fixing platform (11), a locking tongue structure is provided on one side of the fixing platform (11), a latching tongue (14) cooperating with the locking tongue structure is provided on one side of the fixing plate (13), and both sides of the fixing plate (13) are provided with a blocking structure inclined outward, and an inclined bearing platform (18) is provided on the side of the sliding groove (7) close to the guide platform (9), and when the latching tongue (14) cooperates with the locking tongue structure, the fixing platform (11) is provided with a V-shaped fixing plate (13) rotatably connected to the upper side of the fixing platform (11), and a V-shaped fixing plate (13) is provided on one side of the fixing platform (11) The axis height of the wheel body (8) on the fixing plate (13) is the same as that on the inner bottom surface of the carriage body (1); an unlocking structure for cooperating with the contact tongue (14) and the lock tongue structure is provided in the fixing platform (11); when the fixing platform (11) slides toward the guide platform (9) to the extreme position, the unlocking structure is triggered to unlock the cooperation between the contact tongue (14) and the lock tongue structure; after the fixing plate (13) rotates, it contacts one end of the guide platform (9) and simultaneously contacts the top surface of the bearing platform (18).

2. The vehicle-mounted stroke-specific ultra-low-field cranial magnetic resonance imaging system according to claim 1 is characterized in that: The bottom surface of the carriage body (1) is provided with a guide platform (9) in a Y-shaped structure at one end of the two slide grooves (7).

3. The vehicle-mounted stroke-specific ultra-low field brain magnetic resonance imaging system according to claim 1, characterized in that: The front end of the stretcher trolley (2) is provided with a telescopic headrest.

4. The vehicle-mounted stroke-specific ultra-low field brain magnetic resonance imaging system according to claim 1, characterized in that: The six sides of the carriage body (1) are all paved with non-magnetic metal partitions.

5. The vehicle-mounted stroke-specific ultra-low field brain magnetic resonance imaging system according to claim 1, characterized in that: A plurality of groups of high-definition cameras are installed in the carriage body (1) at positions facing the stretcher vehicle (2).

6. The vehicle-mounted stroke-specific ultra-low field brain magnetic resonance imaging system according to claim 1, characterized in that: The stretcher (2) is made of non-magnetic material, and the connecting parts on the body are all made of non-magnetic material.

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