Magnetic resonance receiving device
By designing a magnetic resonance receiving device that is adapted to the head contour of a goat, the problem of poor magnetic resonance imaging results in large animals has been solved, and efficient and accurate optic nerve imaging has been achieved.
Patent Information
- Application Number
- CN202610582766.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-03
AI Technical Summary
The lack of existing magnetic resonance imaging (MRI) receivers suitable for large animals such as goats results in poor MRI imaging quality.
A magnetic resonance receiving device was designed with a shell adapted to the contour of a goat's head. It contains multiple receiving coils and receiving circuits, and can directly receive radio frequency signals from the goat's optic nerve, improving image accuracy and efficiency.
It improves the accuracy and efficiency of external devices in acquiring images of goat optic nerves, enhances the signal-to-noise ratio and spatial resolution of the images, and reduces the probability of uneven image brightness.
Smart Images
Figure CN122330783A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of magnetic resonance technology, and more specifically, to a magnetic resonance receiving device. Background Technology
[0002] Magnetic resonance imaging (MRI) is a non-invasive imaging technique widely used in medical and biological research. Its image quality is highly dependent on the performance of the radio frequency (RF) receiving coil. In recent years, the development of high-channel-count receiving coils has significantly improved the signal-to-noise ratio and spatial resolution of MRI, and it has been successfully applied, especially in neuroscience research on small animals (such as rodents and rabbits).
[0003] In the relevant technical field, although there are magnetic resonance imaging receivers developed for small animals, there is still a lack of magnetic resonance imaging receivers that are compatible with large animals, such as goats. If magnetic resonance imaging receivers for small animals are used to perform magnetic resonance imaging on the optic nerve of large animals, the magnetic resonance imaging effect will be poor due to the low matching degree. Summary of the Invention
[0004] This application provides a magnetic resonance receiving device, which is designed for use with goats. The device can cover the goat's head with a housing. Since the housing can be adapted to the contour of the goat's head, multiple receiving coils can also be adapted to the contour of the goat's head. This allows the device to directly receive the radio frequency signals of the goat's optic nerve, thereby improving the accuracy of the goat's optic nerve images acquired by external devices.
[0005] This application provides a magnetic resonance receiving device suitable for imaging the optic nerve of a goat. The magnetic resonance receiving device includes a housing, multiple receiving coils, and a receiving circuit. The housing has a receiving cavity for accommodating the goat's head, and the housing is adaptable to the contour of the goat's head. Multiple receiving coils are disposed within the housing. The receiving circuit is disposed within the housing and electrically connected to each receiving coil, and is used to connect to an external device. When the housing is placed over the goat's head, the multiple receiving coils are used to receive radio frequency signals from the goat's optic nerve, so that the external device can acquire images of the goat's optic nerve.
[0006] Based on the above embodiments, the magnetic resonance receiving device designed for goats can cover the goat's head with a housing. Since the housing can be adapted to the contour of the goat's head, multiple receiving coils can also be adapted to the contour of the goat's head. This allows the receiving coils to directly receive the goat's optic nerve radio frequency signals, improving the accuracy of the goat's optic nerve images acquired by the external device. Furthermore, since multiple receiving coils can be adapted to the goat's head contour, the efficiency of each receiving coil in receiving radio frequency signals can also be improved, thereby increasing the efficiency of the external device in acquiring the goat's optic nerve images through the magnetic resonance receiving device.
[0007] In some embodiments, the housing has a first wiring area and a second wiring area, and a plurality of receiving coils at least cover the first wiring area and the second wiring area; wherein, when the housing is placed over the head of a goat, the first wiring area is configured to correspond to the face of the goat, such that the receiving coil in the first wiring area can at least receive the radio frequency signal of the optic nerve corresponding to the face of the goat; the second wiring area is configured to correspond to the top of the goat's skull, such that the receiving coil in the second wiring area can at least receive the radio frequency signal of the optic nerve corresponding to the top of the goat's skull.
[0008] Based on the above embodiments, when the outer shell is placed over the head of a goat, the first wiring area corresponds to the goat's face, so that the receiving coil in the first wiring area can at least receive the radio frequency signal of the optic nerve corresponding to the goat's face; the second wiring area corresponds to the top of the goat's skull, so that the receiving coil in the second wiring area can at least receive the radio frequency signal of the optic nerve corresponding to the top of the goat's skull. Thus, the key areas of the goat's optic nerve can be imaged using the receiving coils disposed in the first and second wiring areas. For example, the key areas of the goat's optic nerve can be the area from the goat's eyeball to the optic chiasm. The receiving coil in the first wiring area can at least acquire radio frequency signals of some physiological structures such as the retinal ganglion cell layer, optic disc, and intraorbital segment of the optic nerve. The receiving coil in the second wiring area can at least acquire radio frequency signals of some physiological structures such as the optic canal, intracranial segment of the optic nerve, optic chiasm, and pituitary gland. Thus, the external device can acquire images of the key areas of the goat's optic nerve.
[0009] In some embodiments, the magnetic resonance receiving device includes at least four coil rows arranged sequentially, with partial overlap between adjacent coil rows, each coil row including at least two receiving coils, and adjacent receiving coils within each coil row partially overlapping; a first wiring area is covered by at least two coil rows; and a second wiring area is covered by at least two coil rows.
[0010] Based on the above embodiments, by partially overlapping between two adjacent coil rows and partially overlapping between two adjacent receiving coils within each coil row, the signal-to-noise ratio of the received radio frequency signal can be improved by utilizing the overlapping receiving coils, thereby improving the spatial resolution of the received radio frequency signal and enhancing the clarity of the optic nerve in the optic nerve image of the goat acquired by the external device, thus making it easier for the user to quickly distinguish the optic nerve from the image.
[0011] The first wiring area is covered by at least two coil rows; the second wiring area is covered by at least two coil rows, so that both the first and second wiring areas have a sufficient number of receiving coils to improve the efficiency of the receiving coils in receiving radio frequency signals, thereby improving the efficiency of external devices in acquiring optic nerve images of goats through magnetic resonance receiving devices.
[0012] In some embodiments, each coil bar is arranged symmetrically with respect to the sagittal plane of the housing.
[0013] Based on the above embodiments, each coil array is symmetrically arranged along the sagittal plane of the outer shell. This ensures that when the outer shell is placed over the goat's head, the sagittal plane of the outer shell coincides with the sagittal plane of the goat's head. This allows each coil array to be symmetrically arranged along the sagittal plane of the goat's head, resulting in uniform sensitivity of the multiple receiving coils to radio frequency signals and reducing the probability of uneven image brightness in the goat's optic nerve image. Furthermore, because the multiple receiving coils are symmetrically arranged along the sagittal plane of the goat's head, common-mode noise can be canceled, improving the clarity of the optic nerve in the goat's optic nerve image acquired by external devices.
[0014] In some embodiments, the magnetic resonance receiving device includes sixteen receiving coils; the magnetic resonance receiving device includes four coil rows, the four coil rows including a first coil row, a second coil row, a third coil row and a fourth coil row, the first coil row and the second coil row at least covering a first wiring area, the third coil row and the fourth coil row at least covering a second wiring area; wherein, the first coil row includes four receiving coils, the second coil row includes five receiving coils, the third coil row includes five receiving coils, and the fourth coil row includes two receiving coils.
[0015] Based on the above embodiments, by setting sixteen receiving coils, with the first coil row including four receiving coils, the second coil row including five receiving coils, the third coil row including five receiving coils, and the fourth coil row including two receiving coils, the magnetic resonance receiving device can have enough receiving coils to receive radio frequency signals, thereby improving the efficiency of external devices in obtaining optic nerve images of goats through the magnetic resonance receiving device.
[0016] In some embodiments, the diameter of each receiving coil is D, where D satisfies: 6cm ≤ D ≤ 7cm.
[0017] Based on the above embodiments, the diameter of each receiving coil is D, where D satisfies 6cm≤D≤7cm. This ensures that each receiving coil has a suitable detection depth, resulting in a high signal-to-noise ratio for the radio frequency signals acquired by the receiving coil in the optic nerve region of the goat's head. Furthermore, since the diameter D of each receiving coil satisfies 6cm≤D≤7cm, sixteen receiving coils can be set in the optic nerve region of the goat's head, which matches the number of acquisition channels in common magnetic resonance imaging systems and is beneficial for accelerating magnetic resonance sequence acquisition and imaging.
[0018] If D < 6cm, the diameter of the receiving coil is small, resulting in a shallow detection depth for each receiving coil, which cannot cover the deep area of the optic nerve. In addition, due to the small diameter of each receiving coil, the area covered by each receiving coil is small, requiring more receiving coils to cover the area of the optic nerve in the goat's head. This leads to a higher overall manufacturing cost of the magnetic resonance receiving device, and the large number of receiving coils also results in lower debugging efficiency.
[0019] If D > 7cm, the diameter of the receiving coil is larger. Each receiving coil suffers increased tissue loss due to the increased detection depth, resulting in a lower signal-to-noise ratio of the received radio frequency signal, lower spatial resolution, and poorer imaging clarity. In addition, the larger diameter of the receiving coil results in a smaller number of receiving coils, leading to a smaller number of acquisition channels and failing to leverage the sequence acceleration advantage brought by the increased number of acquisition channels in common magnetic resonance imaging systems.
[0020] In some embodiments, two adjacent receiving coils partially overlap along the outline of the housing, and the length of the outline between the geometric centers of two adjacent receiving coils is L, where L satisfies: 0.7D≤L≤0.8D.
[0021] Based on the above embodiments, L satisfies 0.7D≤L≤0.8D, which enables the radio frequency signal to transition smoothly in the overlapping area of two adjacent receiving coils, thereby resulting in better imaging uniformity and a high signal-to-noise ratio, which can significantly improve the imaging clarity of the goat's optic nerve; and it can also reduce the mutual inductance between two adjacent receiving coils, which can reduce the interference between two adjacent receiving coils through the receiving circuit, so that each coil receives independently and does not crosstalk to each other.
[0022] In some embodiments, the outer casing includes a first housing and a second housing, the second housing being connected to the first housing and forming a receiving cavity with the first housing, and a plurality of receiving coils being disposed in the first housing and the second housing; wherein, when the outer casing is placed over the head of the goat, the first housing is placed over the face of the goat, and the second housing extends from the first housing toward the neck of the goat; and at least the second housing is capable of deformation.
[0023] Based on the above embodiments, by covering the goat's face with the first housing and allowing at least the second housing to deform so that the outer shell can conform to the goat's head contour, the efficiency of each receiving coil receiving radio frequency signals can be improved, thereby improving the efficiency of external devices acquiring optic nerve images of the goat through the magnetic resonance receiving device.
[0024] In other embodiments, both the first and second housings are deformable so that they conform to the head contour of the goat after plastic deformation, thereby improving the efficiency of each receiving coil in receiving radio frequency signals.
[0025] In some embodiments, the first housing includes a first sub-housing and a second sub-housing, the first sub-housing being connected to the second housing, the first sub-housing having a debugging cavity, and an opening communicating with the debugging cavity on the side of the first sub-housing away from the second housing, at least a portion of the receiving circuit and the receiving coil being disposed at the bottom of the debugging cavity; the second sub-housing is movably connected to the side of the first sub-housing away from the second housing for opening and closing the opening; wherein the movable connection between the second sub-housing and the first sub-housing includes at least one of screw connection, snap connection and rotatable connection.
[0026] Based on the above embodiments, the movable connection between the second sub-shell and the first sub-shell allows the second sub-shell to be opened directly when maintenance of the receiving circuit and receiving coil is required, so that the user can perform maintenance on the receiving circuit and receiving coil inside the debugging cavity through the opening, thereby improving the maintenance efficiency of the receiving circuit and receiving coil.
[0027] In some embodiments, the second sub-shell has a cable outlet on the side away from the first sub-shell, the cable outlet being connected to the debugging cavity, and the receiving circuit being used to connect to an external device through the cable outlet.
[0028] Based on the above embodiments, by directly setting the cable outlet on the side of the second sub-shell away from the first sub-shell, the receiving circuit can be connected to external devices through the cable outlet, which is convenient and quick.
[0029] According to this application, a magnetic resonance receiving device is designed for goats. The outer casing can be placed over the goat's head. Because the casing adapts to the contour of the goat's head, multiple receiving coils can also adapt to the contour of the goat's head, allowing direct reception of radio frequency signals from the goat's optic nerve. This improves the accuracy of the goat's optic nerve images acquired by external devices. Furthermore, because multiple receiving coils adapt to the goat's head contour, the efficiency of each receiving coil in receiving radio frequency signals is also improved, thereby increasing the efficiency of external devices acquiring goat optic nerve images through the magnetic resonance receiving device. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of the structure of a magnetic resonance receiving device in one embodiment of this application; Figure 2This is a perspective view of the distribution of the receiving coil on the head of a goat in one embodiment of this application; Figure 3 This is a diagram showing the distribution of the receiving coil on the goat's head from another perspective in one embodiment of this application; Figure 4 For the purpose of this application, a tiled view of the receiving coil in one embodiment is provided; Figure 5 This is an exploded structural diagram of a magnetic resonance receiving device in one embodiment of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Magnetic resonance receiver; 11. Outer shell; 11A. First wiring area; 11B. Second wiring area; 111. First housing; 111A. Debugging cavity; 111B. Opening; 1111. First sub-shell; 1112. Second sub-shell; 1112A. Outlet; 112. Second housing; 12. Receiving coil; 121. Coil array; 122. First coil array; 123. Second coil array; 124. Third coil array; 125. Fourth coil array. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0034] Please refer to Figure 1-4 This application provides a magnetic resonance receiving device 1, which is suitable for imaging the optic nerve of goats. The magnetic resonance receiving device 1 includes a housing 11, a plurality of receiving coils 12 and a receiving circuit.
[0035] The outer casing 11 has a receiving cavity for accommodating the head of a goat, so that the outer casing 11 can be placed around the head of the goat, thereby enabling external devices to image the optic nerve of the goat through the magnetic resonance receiving device 1. Multiple receiving coils 12 and receiving circuits are all disposed inside the outer casing 11, thereby protecting the multiple receiving coils 12 and receiving circuits by the outer casing 11, reducing the probability of damage to the receiving coils 12 and receiving circuits, and thus enabling the receiving coils 12 and receiving circuits to have a longer service life, so that the magnetic resonance receiving device 1 can have a longer service life.
[0036] Multiple receiving coils 12 are disposed within the housing 11 for receiving radio frequency signals. It is understood that the receiving coils 12 do not contain ferromagnetic materials such as iron, steel, nickel, or ferrite, to prevent the receiving coils 12 from being attracted by a strong magnetic field, reducing the probability of the receiving coils 12 overheating severely under radio frequency conditions and reducing the probability of producing severe image artifacts. For example, the receiving coils 12 can be at least one of oxygen-free copper coils, Litz wire coils, silver coils, and superconducting coils.
[0037] The receiving circuit is housed within the casing 11 and electrically connected to each receiving coil 12, and is used to connect to external devices. When the receiving coil 12 receives a radio frequency signal, it converts the radio frequency signal into an electrical signal. The receiving circuit filters and amplifies the electrical signal, and then transmits the filtered and amplified electrical signal to the external device, enabling the external device to acquire a clear image of the goat's optic nerve. In this embodiment, the specific form of the receiving circuit is not limited.
[0038] Please refer to Figure 1-4 Furthermore, the outer shell 11 can be adapted to the head contour of a goat, so that the receiving coil 12 fits the head of the goat as closely as possible. This allows the receiving coil 12 to directly receive the radio frequency signals of the goat's optic nerve, improving the accuracy of the goat's optic nerve images acquired by the external device. Also, since multiple receiving coils 12 can be adapted to the head contour of the goat, the efficiency of each receiving coil 12 in receiving radio frequency signals can be improved, thereby increasing the efficiency of the external device in acquiring the goat's optic nerve images through the magnetic resonance receiving device 1, which facilitates the study of the goat's optic nerve model.
[0039] Compared to studying small animals (such as rodents and rabbits), the optic nerve model of goats has at least the following advantages for users: 1. The eye anatomy of goats is highly similar to that of humans: (1) Optic nerve size: The diameter of the optic nerve in goats (3-4 mm) is close to that of the human optic nerve (4-5 mm), which is much larger than that of rodents (the diameter of the optic nerve in mice is 0.5 mm), making it more suitable for simulating the pathological mechanisms of human optic nerve diseases (such as glaucoma and optic neuritis). (2) Optic chiasm structure: Goats have an incompletely crossed optic chiasm similar to that of humans (about 60% fiber crossing), while rodents have nearly 100% crossing. Therefore, the optic nerve model of goats is more clinically relevant in visual pathway research.
[0040] 2. Stable intraocular pressure and glaucoma research: (1) Goats can establish a chronic high intraocular pressure model by injecting microspheres into the anterior chamber or by laser induction. The trend of intraocular pressure (IOP) changes in goats is consistent with that in human glaucoma, making it an ideal model for studying optic ganglion cell apoptosis and axonal damage. (2) Compared with the size of the eyeball, the eyeball of goats is larger than that of rodents, making it easier to implant sensors or perform surgical operations.
[0041] 3. Suitable for long-term dynamic observation: (1) Goats have a long average lifespan (10-15 years), allowing for longitudinal studies (such as the long-term repair process after optic nerve injury), while mice have a short average lifespan (2-3 years), so goats can be used to carry out long-term longitudinal studies. (2) Goats have a moderate head size (goat brain capacity 90-100cm³), which can accommodate high-resolution magnetic resonance imaging (MRI) coils, and are easier to conduct ethical approval and husbandry management compared to primates (such as macaques).
[0042] Therefore, the magnetic resonance receiving device 1 in this application can more conveniently acquire the optic nerve model of goats, so as to facilitate scientific research using the optic nerve model of goats (such as optic nerve injury, glaucoma model), thereby providing a high-precision imaging tool for the study of the mechanism of diseases such as glaucoma and optic nerve trauma.
[0043] It is understood that the material of the outer shell 11 can be at least one of rigid plastic and flexible plastic. For example, when the material of the outer shell 11 is rigid plastic, the receiving coil 12 and the receiving circuit can be disposed in the injection mold so that the receiving coil 12, the receiving circuit and the outer shell 11 can be formed into one piece by the injection molding process, so that the outer shell 11 can be adapted to the contour of the goat's head and the receiving coil 12 can fit the goat's head as closely as possible.
[0044] Please refer to Figure 1-4In one embodiment, the housing 11 has a first wiring area 11A and a second wiring area 11B, and a plurality of receiving coils 12 at least cover the first wiring area 11A and the second wiring area 11B; wherein, when the housing 11 is placed over the head of a goat, the first wiring area 11A is configured to correspond to the goat's face, such that the receiving coils 12 in the first wiring area 11A can at least receive the radio frequency signal of the optic nerve corresponding to the goat's face; the second wiring area 11B is configured to correspond to the top of the goat's skull, such that the receiving coils 12 in the second wiring area 11B can at least receive the radio frequency signal of the optic nerve corresponding to the top of the goat's skull, thereby enabling the use of the device The receiving coil 12, placed in the first wiring area 11A and the second wiring area 11B, images the key areas of the optic nerve of a goat. For example, the key areas of the optic nerve of a goat can be the area from the goat's eyeball to the optic chiasm. The receiving coil 12 in the first wiring area 11A can at least acquire radio frequency signals of some physiological structures such as the retinal ganglion cell layer, optic disc, and intraorbital segment of the optic nerve. The receiving coil 12 in the second wiring area 11B can at least acquire radio frequency signals of some physiological structures such as the optic canal, intracranial segment of the optic nerve, optic chiasm, and pituitary gland of a goat, thereby enabling external devices to acquire images of the key areas of the optic nerve of a goat.
[0045] Please refer to Figure 1-4 In one embodiment, the magnetic resonance receiving device 1 includes at least four coil rows 121 arranged sequentially, with adjacent coil rows 121 partially overlapping. Each coil row 121 includes at least two receiving coils 12, with adjacent receiving coils 12 within each coil row 121 partially overlapping. A first wiring area 11A is covered by at least two coil rows 121, and a second wiring area 11B is covered by at least two coil rows 121. The overlapping receiving coils 12 can be used to improve the signal-to-noise ratio of the received radio frequency signal and the spatial resolution of the received radio frequency signal, thereby improving the clarity of the optic nerve in the image of the optic nerve of a goat acquired by an external device, and thus making it easier for the user to quickly distinguish the optic nerve from the image.
[0046] The first wiring area 11A is covered by at least two coil rows 121; the second wiring area 11B is covered by at least two coil rows 121, so that both the first wiring area 11A and the second wiring area 11B have a sufficient number of receiving coils 12 to improve the efficiency of the receiving coils 12 in receiving radio frequency signals, thereby improving the efficiency of external devices in acquiring optic nerve images of goats through the magnetic resonance receiving device 1.
[0047] Please refer to Figure 1-4In one embodiment, each coil row 121 is symmetrically arranged with respect to the sagittal plane of the housing 11, so that when the housing 11 is placed over the goat's head, the sagittal plane of the housing 11 coincides with the sagittal plane of the goat's head. This ensures that each coil row 121 is symmetrically arranged with respect to the sagittal plane of the goat's head, resulting in uniform sensitivity of the multiple receiving coils 12 to radio frequency signals and reducing the probability of uneven image brightness in the goat's optic nerve image. Furthermore, since the multiple receiving coils 12 are symmetrically arranged along the sagittal plane of the goat's head, common-mode noise can be canceled, thereby improving the clarity of the optic nerve in the goat's optic nerve image acquired by external devices.
[0048] Please refer to Figure 1-4 Specifically, in this embodiment, the magnetic resonance receiving device 1 may include sixteen receiving coils 12; the magnetic resonance receiving device 1 includes four coil rows 121, the four coil rows 121 including a first coil row 122, a second coil row 123, a third coil row 124 and a fourth coil row 125, the first coil row 122 and the second coil row 123 at least cover the first wiring area 11A, the third coil row 124 and the fourth coil row 125 at least cover the second wiring area 11B; wherein, the first coil row 122 includes four receiving coils 12, the second coil row 123 includes five receiving coils 12, the third coil row 124 includes five receiving coils 12, and the fourth coil row 125 includes two receiving coils 12, so that the magnetic resonance receiving device 1 can have enough receiving coils 12 to receive radio frequency signals, thereby improving the efficiency of external devices in acquiring optic nerve images of goats through the magnetic resonance receiving device 1.
[0049] In other embodiments, the first coil row 122 may include three receiving coils 12, the second coil row 123 may include five receiving coils 12, the third coil row 124 may include five receiving coils 12, and the fourth coil row 125 may include three receiving coils 12. Of course, the first coil row 122 may also include three receiving coils 12, the second coil row 123 may also include four receiving coils 12, the third coil row 124 may also include five receiving coils 12, and the fourth coil row 125 may also include four receiving coils 12. In other embodiments, the number of receiving coils 12 in the first coil row 122, the second coil row 123, the third coil row 124, and the fourth coil row 125 may also be other numbers, all of which enable an external device to acquire optic nerve images of a goat through the magnetic resonance receiving device 1. Further details are omitted in this embodiment.
[0050] Please refer to Figure 1-4In one embodiment, the diameter of each receiving coil 12 is D, where D satisfies: 6cm≤D≤7cm. This allows each receiving coil 12 to have a suitable detection depth, resulting in a high signal-to-noise ratio of the radio frequency signal acquired by the receiving coil 12 in the optic nerve region of the goat's head. Furthermore, since the diameter D of each receiving coil 12 satisfies 6cm≤D≤7cm, sixteen receiving coils 12 can be set in the optic nerve region of the goat's head, which can match the number of acquisition channels in common magnetic resonance systems, thus facilitating accelerated imaging of magnetic resonance sequence acquisition.
[0051] If D < 6cm, the diameter of the receiving coil 12 is small, resulting in a shallow detection depth for each receiving coil 12, which cannot cover the deep region of the optic nerve. In addition, due to the small diameter of each receiving coil 12, the area covered by each receiving coil 12 is small, requiring more receiving coils 12 to cover the region of the optic nerve in the goat's head. This leads to a higher overall manufacturing cost of the magnetic resonance receiving device 1, and the large number of receiving coils 12 also results in lower debugging efficiency.
[0052] If D > 7cm, the diameter of the receiving coil 12 will be larger. Due to the increased tissue loss caused by the increased detection depth, the signal-to-noise ratio of the received radio frequency signal will be lower, resulting in lower spatial resolution and poorer imaging clarity. In addition, the larger diameter of the receiving coil 12 will result in a smaller number of receiving coils, which will reduce the number of acquisition channels and prevent the use of the sequence acceleration advantage brought by the number of acquisition channels in common magnetic resonance imaging systems.
[0053] Please refer to Figure 1-4 In one embodiment, along the outline of the outer shell 11, two adjacent receiving coils 12 partially overlap, and the length of the outline between the geometric centers of the two adjacent receiving coils 12 is L, where L satisfies: 0.7D≤L≤0.8D. This allows the radio frequency signal to transition smoothly in the overlapping area of the two adjacent receiving coils 12, resulting in better imaging uniformity and a higher signal-to-noise ratio, which can significantly improve the imaging clarity of the goat's optic nerve. Furthermore, it reduces the mutual inductance between the two adjacent receiving coils 12, thereby reducing interference between the two adjacent receiving coils 12 through the receiving circuit, allowing each receiving coil 12 to receive independently without crosstalk.
[0054] It is understood that in the embodiments of this application, since two adjacent receiving coils 12 partially overlap, the net magnetic flux between the two adjacent overlapping receiving coils 12 cancels out and the mutual inductance is almost 0, thereby reducing the interference between the two adjacent receiving coils 12, so that each receiving coil 12 receives independently and does not crosstalk to each other.
[0055] In other embodiments, interference between two adjacent receiving coils 12 can also be eliminated in the receiving circuit through capacitive and inductive decoupling. This will not be elaborated upon further in the embodiments of this application.
[0056] It is understandable that when at least one of the following is changed: the diameter of the receiving coil 12, the distance between two adjacent receiving coils 12, or the arrangement of the receiving coils 12, the component parameters in the receiving circuit connected to the receiving coil 12 can be adaptively adjusted to ensure that the receiving circuit can be adapted to the receiving coil 12, thereby ensuring that the external device can acquire a clear image of the goat's optic nerve.
[0057] Please refer to Figure 1-4 In one embodiment, the outer shell 11 includes a first shell 111 and a second shell 112. The second shell 112 is connected to the first shell 111 and forms a receiving cavity with the first shell 111. A plurality of receiving coils 12 are disposed on the first shell 111 and the second shell 112. When the outer shell 11 is placed over the head of the goat, the first shell 111 covers the face of the goat, and the second shell 112 extends from the first shell 111 toward the neck of the goat. By placing the first shell 111 over the face of the goat, and at least the second shell 112 being deformable, the outer shell 11 can conform to the head contour of the goat, thereby improving the efficiency of each receiving coil 12 in receiving radio frequency signals, and thus improving the efficiency of external devices in acquiring optic nerve images of the goat through the magnetic resonance receiving device 1.
[0058] In other embodiments, both the first housing 111 and the second housing 112 are capable of deformation, so that both the first housing 111 and the second housing 112 can conform to the head contour of the goat after deformation, thereby improving the efficiency of each receiving coil 12 in receiving radio frequency signals.
[0059] It is understandable that the way the first shell 111 and the second shell 112 conform to the head contour of the goat after deformation can be achieved by deforming the first shell 111 and the second shell 112 themselves and maintaining the deformed state, or by using an external fastening device to maintain the deformed state of the first shell 111 and the second shell 112 after deformation, both of which can ensure conforming to the head contour of the goat.
[0060] Exemplary examples include cable ties, clamping structures, etc. In other embodiments, the external fastening device may also take other forms. In the embodiments of this application, the specific form of the external fastening device is not limited.
[0061] Please refer to Figure 1-5In one embodiment, the first housing 111 includes a first sub-housing 1111 and a second sub-housing 1112. The first sub-housing 1111 is connected to the second housing 112. The first sub-housing 1111 has a debugging cavity 111A, and the side of the first sub-housing 1111 away from the second housing 112 has an opening 111B communicating with the debugging cavity 111A. At least a portion of the receiving circuit and the receiving coil 12 are disposed at the bottom of the debugging cavity 111A. The second sub-housing 1112 is movably connected to the side of the first sub-housing 1111 away from the second housing 112 for opening and closing the opening 111B. The movable connection between the second sub-housing 1112 and the first sub-housing 1111 includes at least one of screw connection, snap connection, and rotatable connection.
[0062] The movable connection between the second sub-shell 1112 and the first sub-shell 1111 allows the second sub-shell 1112 to be opened directly when maintenance of the receiving circuit and the receiving coil 12 is required. This enables the user to maintain the receiving circuit and the receiving coil 12 in the debugging cavity 111A through the opening 111B, thereby improving the maintenance efficiency of the receiving circuit and the receiving coil 12.
[0063] Please refer to Figure 1-4 In one embodiment, the second sub-shell 1112 has a cable outlet 1112A on the side of the second sub-shell 1111 away from the first sub-shell 1111. The cable outlet 1112A connects to the debugging cavity 111A, and the receiving circuit connects to an external device through the cable outlet 1112A. By directly providing the cable outlet 1112A on the side of the second sub-shell 1112 away from the first sub-shell 1111, the receiving circuit can easily and quickly connect to the external device through the cable outlet 1112A.
[0064] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0066] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0067] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A magnetic resonance receiving device, characterized by Suitable for imaging the optic nerve of goats, the magnetic resonance receiving device includes: The outer shell has a receiving cavity for receiving the head of a goat, and the outer shell is adaptable to the contour of the goat's head; Multiple receiving coils are all disposed within the housing; and A receiving circuit is disposed within the housing and electrically connected to each of the receiving coils, and is used to connect to external devices; When the outer shell is placed over the head of the goat, the plurality of receiving coils are used to receive radio frequency signals from the goat's optic nerve, so that the external device can acquire images of the goat's optic nerve.
2. The magnetic resonance receiving device as claimed in claim 1, characterized in that The housing has a first wiring area and a second wiring area, and the plurality of receiving coils at least cover the first wiring area and the second wiring area; When the outer casing is placed over the head of the goat, the first wiring area is configured to correspond to the face of the goat, so that the receiving coil in the first wiring area can at least receive the radio frequency signal of the optic nerve corresponding to the face of the goat; the second wiring area is configured to correspond to the top of the goat's skull, so that the receiving coil in the second wiring area can at least receive the radio frequency signal of the optic nerve corresponding to the top of the goat's skull.
3. The magnetic resonance receiving device as described in claim 2, characterized in that, The magnetic resonance receiving device includes at least four coil rows arranged sequentially, with partial overlap between adjacent coil rows. Each coil row includes at least two receiving coils, with partial overlap between adjacent receiving coils within each coil row. The first wiring area is covered by at least two of the coil rows; the second wiring area is covered by at least two of the coil rows.
4. The magnetic resonance receiving device as claimed in claim 3, characterized in that Each of the coil rows is arranged symmetrically with respect to the sagittal plane of the housing.
5. The magnetic resonance receiving device as described in claim 3, characterized in that, The magnetic resonance receiving device includes sixteen receiving coils; The magnetic resonance receiving device includes four coil rows, namely a first coil row, a second coil row, a third coil row, and a fourth coil row. The first coil row and the second coil row at least cover the first wiring area, and the third coil row and the fourth coil row at least cover the second wiring area. The first coil row includes four receiving coils, the second coil row includes five receiving coils, the third coil row includes five receiving coils, and the fourth coil row includes two receiving coils.
6. The magnetic resonance receiving device as claimed in claim 1, characterized in that, The diameter of each receiving coil is D, and D satisfies: 6cm≤D≤7cm.
7. The magnetic resonance receiving device as claimed in claim 6, characterized in that Along the outline of the outer shell, two adjacent receiving coils partially overlap, and the length of the outline between the geometric centers of two adjacent receiving coils is L, wherein L satisfies: 0.7D≤L≤0.8D.
8. The magnetic resonance receiving device of any one of claims 1 to 7, characterized in that The outer casing includes: First shell; and A second housing is connected to the first housing and forms the receiving cavity with the first housing; a plurality of receiving coils are disposed in the first housing and the second housing. When the outer shell is placed over the head of the goat, the first shell covers the face of the goat, and the second shell extends from the first shell toward the neck of the goat; and at least the second shell is capable of deformation.
9. The magnetic resonance receiving device as claimed in claim 8, characterized in that The first housing includes: A first sub-shell, connected to the second shell, has a debugging cavity, and an opening communicating with the debugging cavity is located on the side of the first sub-shell away from the second shell. At least a portion of the receiving circuit and the receiving coil are disposed at the bottom of the debugging cavity. The second sub-shell is movably connected to the side of the first sub-shell away from the second shell, and is used to open and close the opening; The second sub-shell is movably connected to the first sub-shell by at least one of screw connection, snap connection, and rotatable connection.
10. The magnetic resonance receiving device as claimed in claim 9, characterized in that, The second sub-shell has a cable outlet on the side away from the first sub-shell. The cable outlet is connected to the debugging cavity, and the receiving circuit is connected to an external device through the cable outlet.