A coil arrangement

Abstract

The present application relates to a kind of coil device, for the magnetic resonance imaging of human body part.This coil device includes first arc coil, second arc coil and screw joint mechanism.The screw joint mechanism is correspondingly arranged between the first arc coil and the second arc coil, to connect the second arc coil rotatably on the first arc coil by the screw joint mechanism, wherein when the second arc coil is rotated to spin close to the first arc coil, the first arc coil and the second arc coil form closed loop structure for surrounding the human body part;And when the second arc coil is rotated to spin away from the first arc coil, the first arc coil and the second arc coil form open loop structure for taking and placing the human body part, so that in the process of the magnetic resonance imaging of human body part, reduce workflow, free the hands of medical staff or physician.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic resonance imaging, and in particular to a coil device. BACKGROUND

[0002] Magnetic resonance imaging (MRI) is a kind of imaging device for medical examination, which is currently commonly used in clinic, safe and free of ionizing radiation. It mainly uses the principle of magnetic resonance. As an important component in the magnetic resonance imaging system, the radio frequency (RF) receiving coil can be compared to the eyes of a person, and the final clarity of the image is directly proportional to the coil signal-to-noise ratio / sensitivity. Generally, the farther the distance between the coil and the part of the human body to be scanned, the lower the signal-to-noise ratio / sensitivity of the coil, and correspondingly, the worse the clarity of the image. Therefore, the market requires that the inner wall of the coil should be as close as possible to the human body to ensure high signal-to-noise ratio.

[0003] For example, the current magnetic resonance system usually uses a split coil composed of an upper half and a lower half for imaging of special parts such as knees, knee joints, elbow joints or necks, and the upper half and the lower half of the split coil are electrically connected through a detachable connector. In this way, since the upper half and the lower half of the split coil can be separated, the part of the human body to be scanned can be directly placed between the separated upper half and lower half, so that the aperture size of the split coil can be reduced, which helps to reduce the distance between the coil and the part to be scanned, thereby reducing the signal-to-noise ratio decay and obtaining a clear magnetic resonance image.

[0004] However, when using the split coil to scan the knee of a patient, the medical staff or the physician needs to hold the upper half of the split coil and, after the patient's knee is positioned and fixed, accurately connect and fix the upper half to the lower half with both hands, and finally start the magnetic resonance scan. It can be easily seen that the use of the split coil not only has a complex workflow and requires multiple steps of operation, but also requires two-handed operation, which cannot free the hands of the medical staff or the physician. At the same time, the upper half and the lower half of the split coil need to have a guiding and positioning structure when they are combined, or the medical staff or the physician needs to judge the locking position well in order to achieve correct operation. In addition, the upper half of the split coil has a risk of falling off during hand holding and is easy to be damaged. SUMMARY

[0005] An advantage of the present application is to provide a coil device which can realize magnetic resonance imaging of special parts of the human body such as knees, knee joints, elbow joints or necks while reducing the workflow and saving time.

[0006] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can be held without the coil during the whole use process, so as to reduce the risk of the coil falling off during the holding process and improve the reliability of the coil device.

[0007] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can be opened and closed by one hand of a medical staff or a doctor, so as to simplify the opening and closing operation and facilitate the use.

[0008] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can automatically and accurately align the second arc-shaped coil and the first arc-shaped coil without the judgment of a medical staff or a doctor.

[0009] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can open and close the second arc-shaped coil relative to the first arc-shaped coil, so as to more conveniently and simply operate the coil device.

[0010] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can omit the connectors between the coils, so as to not only save the cost, but also improve the safety of the electrical appliance.

[0011] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can realize the electrical connection between the first arc-shaped coil and the second arc-shaped coil by the jumper mode, without using the expensive connectors.

[0012] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the coil device can increase the insertion allowance of the cable through the runway-type hole, so as to avoid the abrasion of the cable during the opening and closing operation and protect the cable.

[0013] Another advantage of the present application is to provide a coil device, wherein in an embodiment of the present application, the screwing mechanism of the coil device can not only realize the rotatable connection between the first arc-shaped coil and the second arc-shaped coil, but also cover the cable, so as to maximize the protection of the cable.

[0014] Another advantage of the present application is to provide a coil device, wherein in order to achieve the above advantages or purposes, the present application does not need to use expensive materials or complex structures. Therefore, the present application successfully and effectively provides a solution, not only provides a simple coil device, but also increases the practicability and reliability of the coil device.

[0015] To achieve at least one of the above-mentioned advantages or other advantages and objects of the present application, the present application provides a coil device for magnetic resonance imaging of a human body part, wherein the coil device comprises:

[0016] a first arc-shaped coil;

[0017] a second arc-shaped coil; and

[0018] a screwing mechanism, wherein the screwing mechanism is correspondingly arranged between the first arc-shaped coil and the second arc-shaped coil, so as to rotatably connect the second arc-shaped coil to the first arc-shaped coil through the screwing mechanism, wherein when the second arc-shaped coil is rotated to screw close to the first arc-shaped coil, the first arc-shaped coil and the second arc-shaped coil form a closed loop structure for surrounding the human body part, and when the second arc-shaped coil is rotated to screw away from the first arc-shaped coil, the first arc-shaped coil and the second arc-shaped coil form an open loop structure for taking and placing the human body part.

[0019] According to an embodiment of the present application, the screwing mechanism comprises a rotating shaft of the first arc-shaped coil and a connecting member extending radially from the rotating shaft, wherein the rotating shaft extends along an axial direction of the coil device, and the connecting member is fixedly connected to the second arc-shaped coil.

[0020] According to an embodiment of the present application, the rotating shaft of the screwing mechanism is fixedly arranged in the connecting member, and the rotating shaft is rotatably connected to the first arc-shaped coil.

[0021] According to an embodiment of the present application, the first arc-shaped coil is provided with a pivoting groove matched with the rotating shaft, and the second arc-shaped coil is provided with a fixed groove matched with the connecting member, wherein the pivoting groove of the first arc-shaped coil corresponds to the fixed groove of the second arc-shaped coil, and the screwing mechanism is accommodated in the pivoting groove and the fixed groove.

[0022] According to an embodiment of the present application, the first arc-shaped coil comprises a first hard shell and a first soft lining arranged inside the first hard shell, and the second arc-shaped coil comprises a second hard shell and a second soft lining arranged inside the second hard shell, wherein the first soft lining and the second soft lining are both wrapped with a radio frequency antenna, and the rotating shaft and the connecting member of the screwing mechanism are correspondingly connected to the first hard shell and the second hard shell, respectively.

[0023] According to an embodiment of the present application, the coil device further comprises a cable, wherein one end of the cable is connected to the first arc-shaped coil, and the other end of the cable is connected to the second arc-shaped coil.

[0024] According to one embodiment of the present application, the first hard shell of the first arc-shaped coil is provided with a first wire hole for the cable to pass through, and the second hard shell of the second arc-shaped coil is provided with a second wire hole for the cable to pass through.

[0025] According to one embodiment of the present application, the first wire hole of the first hard shell is in the pivot slot of the first arc-shaped coil, and the second wire hole of the second hard shell is in the pivot slot of the second arc-shaped coil.

[0026] According to one embodiment of the present application, the connecting member of the screwing mechanism is provided with a wire slot corresponding to the first wire hole and the second wire hole, for accommodating the cable passing out from the first wire hole and the second wire hole.

[0027] According to one embodiment of the present application, the coil device is formed by one first arc-shaped coil and two second arc-shaped coils to form a complete ring structure, so as to switch between the closed loop structure and the open loop structure in a side opening and closing manner.

[0028] According to one embodiment of the present application, the coil device further comprises a lock mechanism arranged between the second arc-shaped coils, so as to releasably lock one second arc-shaped coil to another second arc-shaped coil through the lock mechanism.

[0029] According to one embodiment of the present application, the screwing mechanism further comprises an elastic element arranged between the first arc-shaped coil and the second arc-shaped coil, wherein the elastic element is used to apply a torsional force to the second arc-shaped coil, so that the second arc-shaped coil is automatically rotated relative to the first arc-shaped coil to automatically switch to the open loop structure.

[0030] According to one embodiment of the present application, the elastic element is a torsion spring.

[0031] In summary, compared with the split coil existing in the market, the coil device provided by the present application can switch between the open loop state and the closed loop state, and is convenient for placing human body parts such as knees, knee joints, elbow joints or necks into it, so as to reduce the work flow and free the hands of medical staff or doctors during the process of magnetic resonance imaging of the human body parts. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A schematic view of a closed loop structure of a coil device according to one embodiment of the present application;

[0033] Figure 2A schematic diagram of the open loop structure of the coil device according to the above embodiment of the present application is shown;

[0034] Figure 3 A schematic diagram of the coil device according to the above embodiment of the present application is shown;

[0035] Figure 4 A schematic diagram of the coil device according to the above embodiment of the present application is shown;

[0036] Main component symbol explanation: 1, coil device; 101, closed loop structure; 102, open loop structure; 10, first arc-shaped coil; 11, first hard shell; 110, pivot slot; 111, first wire hole; 12, first soft lining; 20, second arc-shaped coil; 21, second hard shell; 210, fixed slot; 211, second wire hole; 22, second soft lining; 30, rotating mechanism; 31, rotating shaft; 32, connecting piece; 320, wire slot; 33, elastic element; 330, torsion spring; 40, wire cable; 50, lock mechanism; 51, locking structure; 52, release structure.

[0037] The above main component symbol explanation is further explained in detail in combination with the drawings and the specific embodiments. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] It should be noted that when a component is referred to as "being disposed on" or "being mounted on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "being disposed on" another component, it can be directly disposed on the other component or there can be a middle component. When a component is referred to as "being fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] Reference is made to the accompanying drawings that form a part of this disclosure Figures 1 to 4As shown, an embodiment of the present application provides a coil device 1 which is capable of switching back and forth between an open loop state and a closed loop state, facilitating the placement of a human body part into it, so as to reduce the workflow and free the hands of medical staff or doctors during the process of using the coil device 1 to perform magnetic resonance imaging on the human body part. It can be understood that in the above-mentioned embodiments of the present application, the human body part mentioned in the present application can be implemented as a human knee, but in other examples of the present application, the human body part can also be implemented as other special parts such as a knee joint, an elbow joint or a neck, and the present application will not be repeated here.

[0042] Specifically, as shown in Figure 1 and Figure 2 The coil device 1 can include a first arc-shaped coil 10, a second arc-shaped coil 20, and a screwing mechanism 30, wherein the screwing mechanism 30 is correspondingly arranged between the first arc-shaped coil 10 and the second arc-shaped coil 20, so as to rotatably connect the second arc-shaped coil 20 to the first arc-shaped coil 10 through the screwing mechanism 30, wherein when the second arc-shaped coil 20 is rotated to rotate close to the first arc-shaped coil 10, the first arc-shaped coil 10 and the second arc-shaped coil 20 form a closed loop structure 101 for surrounding the human body part, and when the second arc-shaped coil 20 is rotated to rotate away from the first arc-shaped coil 10, the first arc-shaped coil 10 and the second arc-shaped coil 20 form an open loop structure 102 for taking and placing the human body part.

[0043] It is worth noting that since the screwing mechanism 30 of the present application not only can rotatably connect the first arc-shaped coil 10 and the second arc-shaped coil 20 together to form the coil device 1 with an integrated structure, but also can make the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 for facilitating the magnetic resonance imaging of the human body part and the open loop structure 102 for facilitating the taking and placing of the human body part, when the second arc-shaped coil 20 is rotated to form the open loop structure 102 with the first arc-shaped coil 10, the second arc-shaped coil 20 is still physically connected to the first arc-shaped coil 10, without the need for medical staff or doctors to hold the second arc-shaped coil 20, not only reducing the risk of falling during holding and improving the reliability of the coil device, but also helping to free the hands of medical staff or doctors, facilitating operation.

[0044] More specifically, as shown in Figures 1 to 3As shown, the screwing mechanism 30 of the coil device 1 can include a rotating shaft 31 arranged at the first arc-shaped coil 10 and a connecting member 32 extending radially from the rotating shaft 31, wherein the rotating shaft 31 of the screwing mechanism 30 extends along the axial direction of the coil device 1, and the connecting member 32 is fixedly connected to the second arc-shaped coil 20, wherein when the connecting member 32 rotates around the rotating shaft 31, the second arc-shaped coil 20 is driven by the connecting member 32 to rotate relative to the first arc-shaped coil 10 about the rotating shaft 31, so that the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 or the open loop structure 102. It can be understood that the axial direction of the coil device 1 mentioned in the present application refers to the front-rear direction as shown, that is, the second arc-shaped coil 20 can be flipped in the left-right direction relative to the first arc-shaped coil 10 to form the closed loop structure 101 or the open loop structure 102 as needed. Figure 1 As shown, the screwing mechanism 30 of the coil device 1 can include a rotating shaft 31 arranged at the first arc-shaped coil 10 and a connecting member 32 extending radially from the rotating shaft 31, wherein the rotating shaft 31 of the screwing mechanism 30 extends along the axial direction of the coil device 1, and the connecting member 32 is fixedly connected to the second arc-shaped coil 20, wherein when the connecting member 32 rotates around the rotating shaft 31, the second arc-shaped coil 20 is driven by the connecting member 32 to rotate relative to the first arc-shaped coil 10 about the rotating shaft 31, so that the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 or the open loop structure 102. It can be understood that the axial direction of the coil device 1 mentioned in the present application refers to the front-rear direction as shown, that is, the second arc-shaped coil 20 can be flipped in the left-right direction relative to the first arc-shaped coil 10 to form the closed loop structure 101 or the open loop structure 102 as needed.

[0045] As shown, the screwing mechanism 30 of the coil device 1 can include a rotating shaft 31 arranged at the first arc-shaped coil 10 and a connecting member 32 extending radially from the rotating shaft 31, wherein the rotating shaft 31 of the screwing mechanism 30 extends along the axial direction of the coil device 1, and the connecting member 32 is fixedly connected to the second arc-shaped coil 20, wherein when the connecting member 32 rotates around the rotating shaft 31, the second arc-shaped coil 20 is driven by the connecting member 32 to rotate relative to the first arc-shaped coil 10 about the rotating shaft 31, so that the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 or the open loop structure 102. It can be understood that the axial direction of the coil device 1 mentioned in the present application refers to the front-rear direction as shown, that is, the second arc-shaped coil 20 can be flipped in the left-right direction relative to the first arc-shaped coil 10 to form the closed loop structure 101 or the open loop structure 102 as needed. Figure 1 Figure 3 As shown, the screwing mechanism 30 of the coil device 1 can include a rotating shaft 31 arranged at the first arc-shaped coil 10 and a connecting member 32 extending radially from the rotating shaft 31, wherein the rotating shaft 31 of the screwing mechanism 30 extends along the axial direction of the coil device 1, and the connecting member 32 is fixedly connected to the second arc-shaped coil 20, wherein when the connecting member 32 rotates around the rotating shaft 31, the second arc-shaped coil 20 is driven by the connecting member 32 to rotate relative to the first arc-shaped coil 10 about the rotating shaft 31, so that the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 or the open loop structure 102. It can be understood that the axial direction of the coil device 1 mentioned in the present application refers to the front-rear direction as shown, that is, the second arc-shaped coil 20 can be flipped in the left-right direction relative to the first arc-shaped coil 10 to form the closed loop structure 101 or the open loop structure 102 as needed.

[0046] As shown, the screwing mechanism 30 of the coil device 1 can include a rotating shaft 31 arranged at the first arc-shaped coil 10 and a connecting member 32 extending radially from the rotating shaft 31, wherein the rotating shaft 31 of the screwing mechanism 30 extends along the axial direction of the coil device 1, and the connecting member 32 is fixedly connected to the second arc-shaped coil 20, wherein when the connecting member 32 rotates around the rotating shaft 31, the second arc-shaped coil 20 is driven by the connecting member 32 to rotate relative to the first arc-shaped coil 10 about the rotating shaft 31, so that the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 or the open loop structure 102. It can be understood that the axial direction of the coil device 1 mentioned in the present application refers to the front-rear direction as shown, that is, the second arc-shaped coil 20 can be flipped in the left-right direction relative to the first arc-shaped coil 10 to form the closed loop structure 101 or the open loop structure 102 as needed.

[0047] As shown, the screwing mechanism 30 of the coil device 1 can include a rotating shaft 31 arranged at the first arc-shaped coil 10 and a connecting member 32 extending radially from the rotating shaft 31, wherein the rotating shaft 31 of the screwing mechanism 30 extends along the axial direction of the coil device 1, and the connecting member 32 is fixedly connected to the second arc-shaped coil 20, wherein when the connecting member 32 rotates around the rotating shaft 31, the second arc-shaped coil 20 is driven by the connecting member 32 to rotate relative to the first arc-shaped coil 10 about the rotating shaft 31, so that the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101 or the open loop structure 102. It can be understood that the axial direction of the coil device 1 mentioned in the present application refers to the front-rear direction as shown, that is, the second arc-shaped coil 20 can be flipped in the left-right direction relative to the first arc-shaped coil 10 to form the closed loop structure 101 or the open loop structure 102 as needed.

[0048] ​More preferably, as shown in Figure 1 , Figure 3 and Figure 4 , the first arc-shaped coil 10 is provided with a pivoting groove 110 matched with the rotating shaft 31 of the screwing mechanism 30, and the second arc-shaped coil 20 is provided with a fixing groove 210 matched with the connecting piece 32 of the screwing mechanism 30, wherein the pivoting groove 110 of the first arc-shaped coil 10 and the fixing groove 210 of the second arc-shaped coil 20 correspond to each other, and the screwing mechanism 30 is accommodated in the pivoting groove 110 and the fixing groove 210. In this way, when the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101, the screwing mechanism 30 can be accommodated in the pivoting groove 110 and the fixing groove 210 to ensure the aesthetics of the coil device 1; and when the first arc-shaped coil 10 and the second arc-shaped coil 20 form the open loop structure 102, the connecting piece 32 of the screwing mechanism 30 can be limited by the side wall of the pivoting groove 110 to support the connecting piece 32, so that the second arc-shaped coil 20 can still be stably held to the side of the first arc-shaped coil 10, avoiding the risk of accidental falling or collision with the ground, which helps to improve the overall reliability of the coil device.

[0049] According to the above embodiments of the present application, the first arc-shaped coil 10 can be made of a hard material wrapped around a radio frequency antenna, so as to be fixed on an object such as a hospital bed or a chair and support the pressure applied by the part of the patient to be scanned (such as the knee or the neck) while forming the closed loop structure 101 or the open loop structure 102 with the second arc-shaped coil 20, thereby ensuring the stability of the overall structure. It can be understood that the hard material mentioned in the present application can be implemented by, but is not limited to, hard plastic, polymer material or metal material, and the present application will not be repeated here.

[0050] Correspondingly, the second arc-shaped coil 20 can also be made of a hard material wrapped around a radio frequency antenna, but is not limited to. It is worth noting that in other examples of the present application, the first arc-shaped coil 10 and / or the second arc-shaped coil 20 can also be made of a flexible material wrapped around a radio frequency antenna. It can be understood that the flexible material mentioned in the present application can be implemented by, but is not limited to, foamed material EVA, artificial leather or PU leather, which helps to simplify the manufacturing process and reduce the manufacturing cost. In other words, the first arc-shaped coil 10 and / or the second arc-shaped coil 20 not only have a certain flexibility to adjust the shape according to the shape and size of the human body part during use, but also have a certain toughness or tension, so that the first arc-shaped coil 10 and / or the second arc-shaped coil 20 can maintain its ergonomic structure, such as the arc shape, so as to take and place the human body part to be scanned.

[0051] In addition, the radio frequency antennas of the first arc-shaped coil 10 and the second arc-shaped coil 20 are mainly used to contribute to the radio frequency signals for imaging the human body part. In other words, the radio frequency antennas are provided with some distributed capacitances for resonance at a specific frequency to contribute to the radio frequency signals for imaging the human body part. It can be understood that the radio frequency antennas can be but not limited to be implemented as closed loops made of conductive materials such as copper substrates, liquid metals, coaxial lines or conductive silver paste, etc.

[0052] In particular, as shown in Figure 3 The first arc-shaped coil 10 can include a first hard shell 11 and a first soft lining 12 wrapped with a radio frequency antenna, and the first soft lining 12 is correspondingly arranged on the inner side of the first hard shell 11, so as to better fit the human body part to be scanned while supporting the human body part to be scanned, and reduce the signal-to-noise ratio attenuation. Correspondingly, the second arc-shaped coil 20 can also include a second hard shell 21 and a second soft lining 22 wrapped with a radio frequency antenna, and the second soft lining 22 is correspondingly arranged on the inner side of the second hard shell 21. It can be understood that the first hard shell 11 and the second hard shell 21 can be made of the above-mentioned hard materials, and the first soft lining 12 and the second soft lining 22 can be made of the above-mentioned flexible materials wrapped with radio frequency antennas.

[0053] Preferably, the rotating shaft 31 and the connecting piece 32 of the rotating mechanism 30 are connected to the first hard shell 11 of the first arc-shaped coil 10 and the second hard shell 21 of the second arc-shaped coil 20 respectively, to form a stable and reliable overall structure. That is, the pivoting groove 110 of the first arc-shaped coil 10 is located on the first hard shell 11 of the first arc-shaped coil 10, and the fixed groove 210 of the second arc-shaped coil 20 is located on the second hard shell 21 of the second arc-shaped coil 20, so as to realize stable and reliable pivoting and fixing, so that the coil device 1 has a stable and integrated structure.

[0054] More preferably, the end of the first soft lining 12 of the first arc-shaped coil 10 and the end of the second soft lining 22 of the second arc-shaped coil 20 have a matching nesting structure, so that when the first arc-shaped coil 10 and the second arc-shaped coil 20 form the closed loop structure 101, the end of the first soft lining 12 and the end of the second soft lining 22 are matched and embedded to form a complete annular structure, which facilitates complete wrapping around the human body part and helps to obtain a complete magnetic resonance image.

[0055] It is worth noting that when the coil device 1 is used for magnetic resonance imaging, the radio frequency antennas in the first arc-shaped coil 10 and the second arc-shaped coil 20 need to be powered, and since the parts of the coil device 1 of the present application are an integral whole and are not separated from each other, the first arc-shaped coil 10 and the second arc-shaped coil 20 do not need to be electrically connected by using expensive connectors, but can be electrically connected between the two by means of a jumper, thereby enabling the first arc-shaped coil 10 and the second arc-shaped coil 20 to be powered simultaneously by using only one power supply port.

[0056] Specifically, as shown in Figure 4 The coil device 1 can further include a cable 40, wherein one end of the cable 40 is connected to the first arc-shaped coil 10, and the other end of the cable 40 is connected to the second arc-shaped coil 20, so as to electrically connect the first arc-shaped coil 10 and the second arc-shaped coil 20 by means of a jumper.

[0057] Preferably, as shown in Figure 3 and Figure 4 The first hard shell 11 of the first arc-shaped coil 10 is provided with a first wire hole 111 for the cable 40 to pass through, and the second hard shell 21 of the second arc-shaped coil 20 is provided with a second wire hole 211 for the cable 40 to pass through, so that the cable 40 electrically connected to the second soft lining 22 of the second arc-shaped coil 20 passes through the second wire hole 211 and the first wire hole 111 in sequence, and then is electrically connected to the power supply port of the first arc-shaped coil 10.

[0058] More preferably, the first wire hole 111 and the second wire hole 211 both have a racetrack type structure, so as to better avoid wear and tear of the cable 40 during opening and closing of the coil device 1, and to help ensure that the opening and closing life of the coil device 1 reaches more than sixty thousand times. It can be understood that since the cable 40 will be twisted during rotation of the second arc-shaped coil 20 relative to the first arc-shaped coil 10, the cable 40 of the present application can be designed to have sufficient slack when passing through the first wire hole 111 and the second wire hole 211, i.e. the length of the cable 40 can be as long as possible, which helps to ensure that the cable 40 is well protected when twisted.

[0059] Most preferably, the first wire hole 111 of the first hard shell 11 is located within the pivoting groove 110 of the first arc-shaped coil 10, and the second wire hole 211 of the second hard shell 21 is located within the fixed groove 210 of the second arc-shaped coil 20, so that the wire 40 is shielded by the screwing mechanism 30 installed within the pivoting groove 110 and the fixed groove 210, which helps to maximize the protection of the wire 40 from being damaged due to being exposed.

[0060] Optionally, the connecting piece 32 of the screwing mechanism 30 is provided with a wire groove 320 corresponding to the first wire hole 111 and the second wire hole 211, for accommodating the wire 40 passing out of the first wire hole 111 and the second wire hole 211, so as to allow the wire 40 to have sufficient length allowance while avoiding being exposed, thereby better protecting the wire 40.

[0061] It is worth noting that, as shown in Figure 1 and Figure 2 , the coil device 1 of the present application can be formed by one first arc-shaped coil 10 and two second arc-shaped coils 20 to form a complete ring structure, so as to switch between the closed loop structure 101 and the open loop structure 102 through the double-sided opening and closing mode; of course, the coil device 1 can also only include one first arc-shaped coil 10 and one second arc-shaped coil 20 to switch between the closed loop structure 101 and the open loop structure 102 through the single-sided opening and closing mode, at this time the first arc-shaped coil 10 and the second arc-shaped coil 20 can both have a semi-ring structure to form a complete ring structure. In addition, in other examples of the present application, the number of second arc-shaped coils 20 can also exceed two, and the plurality of second arc-shaped coils 20 are connected in sequence through the screwing mechanism 30, as long as the switching between the closed loop structure 101 and the open loop structure 102 can be realized, and the present application will not be repeated here.

[0062] Exemplarily, as shown in Figures 1 to 3As shown, according to the above-mentioned embodiments of the present application, the coil device 1 can include one first arc-shaped coil 10, two second arc-shaped coils 20 and at least two screwing mechanisms 30, wherein the two second arc-shaped coils 20 are respectively rotatably connected to the left and right ends of the first arc-shaped coil 10 through the at least two screwing mechanisms 30, so that the two second arc-shaped coils 20 are respectively turned left and right apart from the first arc-shaped coil 10 to form the open-loop structure 102. Of course, when the two second arc-shaped coils 20 are respectively turned left and right together with the first arc-shaped coil 10, the closed-loop structure 101 will be formed. It can be understood that in this example, the first arc-shaped coil 10 can have a half-loop structure, and the two second arc-shaped coils 20 can have a ¼ loop structure, so as to be sequentially connected end to end to form a complete loop structure.

[0063] Preferably, in order to improve the stability of the connection between the second arc-shaped coil 20 and the first arc-shaped coil 10, the present application can rotatably connect each second arc-shaped coil 20 with the first arc-shaped coil 10 through multiple coaxially arranged screwing mechanisms 30. For example, in the above-mentioned example of the present application, each second arc-shaped coil 20 is connected with the first arc-shaped coil 10 through three coaxially arranged screwing mechanisms 30, so as to improve the stability of the overall structure.

[0064] It is worth noting that, as Figures 1 to 3 As shown, in order to ensure that the coil device 1 can be stably maintained in the closed-loop structure 101 so as to perform magnetic resonance imaging on the human body part placed therein, the coil device 1 of the present application can further include a locking mechanism 50 arranged on the second arc-shaped coil 20, so as to releasably lock one second arc-shaped coil 20 with another second arc-shaped coil 20 through the locking mechanism 50.

[0065] Exemplarily, as Figure 1 and Figure 3As shown, the locking mechanism 50 can include a locking structure 51 arranged between the ends of the two second arc-shaped coils 20 and a releasing structure 52 for opening the locking structure 51, wherein when the two second arc-shaped coils 20 are turned to abut each other relative to the first arc-shaped coil 10 to contact each other, the locking structure 51 of the locking mechanism 50 is triggered to be locked, so that the ends of the two second arc-shaped coils 20 are locked together to form the stable closed loop structure 101 together with the first arc-shaped coil 10; and when the releasing structure 52 of the locking mechanism 50 is triggered to open the locking structure 51, the ends of the two second arc-shaped coils 20 are released, so that the two second arc-shaped coils 20 can be turned to open relative to the first arc-shaped coil 10 to form the open loop structure 102 together with the first arc-shaped coil 10.

[0066] It can be understood that the locking structure 51 of the locking mechanism 50 can be locked by means of insertion, hooking or clamping, etc., but is not limited thereto; correspondingly, the releasing structure 52 of the locking mechanism 50 can be implemented as a structure such as a button or a lever, etc., as long as it can open the locked locking structure 51, and details are not described herein again.

[0067] In addition, when the coil device 1 only includes one second arc-shaped coil 20, the locking mechanism 50 is arranged between the first arc-shaped coil 10 and the second arc-shaped coil 20, that is, the rotating and connecting mechanism 30 and the locking mechanism 50 are respectively arranged between the left and right ends of the first arc-shaped coil 10 and the left and right ends of the second arc-shaped coil 20, so that one end of the first arc-shaped coil 10 serves as a rotating and connecting end and the other end serves as a locking end, ensuring that the coil device 1 can form the closed loop structure 101 and the open loop structure 102.

[0068] It is worth mentioning that, as shown, Figure 3 The rotating and connecting mechanism 30 of the present application can further include an elastic element 33 arranged between the first arc-shaped coil 10 and the second arc-shaped coil 20, wherein the elastic element 33 is used to apply a torsional force to the second arc-shaped coil 20, so that the second arc-shaped coil 20 can be automatically turned relative to the first arc-shaped coil 10 to automatically switch from the closed loop structure 101 to the open loop structure 102. In other words, when the locking structure 51 of the locking mechanism 50 is opened, the second arc-shaped coil 20 is automatically turned under the action of the torsional force applied by the elastic element 33 to automatically form the open loop structure 102 with the first arc-shaped coil 10, facilitating the taking and placing of a human body part.

[0069] It can be understood that, in the use of the coil device 1, the user only needs to press the release structure 52 of the lock mechanism 50 with one hand to open the locking structure 51, at this time, the two second arc-shaped coils 20 will be automatically opened relative to the first arc-shaped coil 10 under the action of the elastic element 33, to form the open-loop structure 102, facilitating the taking and placing of the human body part for magnetic resonance scanning.

[0070] Optionally, the elastic element 33 can be but is not limited to being implemented as a torsion spring 330, wherein the torsion spring 330 is correspondingly arranged on the rotating shaft 31 of the rotating mechanism 30, so as to apply a required torsional force to the rotating shaft 31, so that the connecting piece 32 automatically synchronously rotates with the rotating shaft 31, so as to automatically form the open-loop structure 102 between the second arc-shaped coil 20 and the first arc-shaped coil 10. Of course, in other examples of the present application, the torsion spring 330 can also be correspondingly arranged on the connecting piece 32 of the rotating mechanism 30, so as to apply a required torsional force to the connecting piece 32, so that the connecting piece 32 automatically rotates around the rotating shaft 31, and still can automatically form the open-loop structure 102 between the second arc-shaped coil 20 and the first arc-shaped coil 10.

[0071] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0072] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A coil arrangement for magnetic resonance imaging of a human body part, characterized by The coil device comprises: a first arc-shaped coil (10); a second arc-shaped coil (20); and a screwing mechanism (30), wherein the screwing mechanism (30) is correspondingly arranged between the first arc-shaped coil (10) and the second arc-shaped coil (20) to rotatably connect the second arc-shaped coil (20) to the first arc-shaped coil (10) through the screwing mechanism (30), wherein when the second arc-shaped coil (20) is rotated to screw close to the first arc-shaped coil (10), the first arc-shaped coil (10) and the second arc-shaped coil (20) form a closed loop structure (101) for surrounding the human body part, and when the second arc-shaped coil (20) is rotated to screw away from the first arc-shaped coil (10), the first arc-shaped coil (10) and the second arc-shaped coil (20) form an open loop structure (102) for taking and placing the human body part. The coil device is formed by one first arc-shaped coil (10) and two second arc-shaped coils (20) to form a complete ring structure, so as to switch between the closed loop structure (101) and the open loop structure (102) in a bilateral opening and closing manner, and the two second arc-shaped coils (20) are rotatably connected to the left and right ends of the first arc-shaped coil (10) through at least two screwing mechanisms (30), so that the two second arc-shaped coils (20) are rotated left and right respectively and are opened and closed left and right relative to the first arc-shaped coil (10).

2. The coil arrangement of claim 1, wherein, The screwing mechanism (30) comprises a rotating shaft (31) arranged on the first arc-shaped coil (10) and a connecting piece (32) extending radially from the rotating shaft (31), wherein the rotating shaft (31) extends along the axial direction of the coil device, and the connecting piece (32) is fixed to the second arc-shaped coil (20).

3. The coil arrangement of claim 2, wherein, The first arc-shaped coil (10) is provided with a pivoting groove (110) matched with the rotating shaft (31), and the second arc-shaped coil (20) is provided with a fixed groove (210) matched with the connecting piece (32), wherein the pivoting groove (110) of the first arc-shaped coil (10) corresponds to the fixed groove (210) of the second arc-shaped coil (20), and the screwing mechanism (30) is accommodated in the pivoting groove (110) and the fixed groove (210).

4. The coil arrangement of claim 3, wherein, The first arc-shaped coil (10) comprises a first hard shell (11) and a first soft lining (12) arranged inside the first hard shell (11), and the second arc-shaped coil (20) comprises a second hard shell (21) and a second soft lining (22) arranged inside the second hard shell (21), wherein the first soft lining (12) and the second soft lining (22) are wrapped with radio frequency antennas, and the rotating shaft (31) and the connecting piece (32) of the screwing mechanism (30) are correspondingly connected to the first hard shell (11) and the second hard shell (21), respectively.

5. The coil arrangement of claim 4, wherein, The coil device further comprises a cable (40), wherein one end of the cable (40) is connected to the first arc-shaped coil (10), and the other end of the cable (40) is connected to the second arc-shaped coil (20).

6. The coil arrangement of claim 5, wherein, The first hard shell (11) of the first arc-shaped coil (10) is provided with a first wire hole (111) for the cable (40) to pass through, and the second hard shell (21) of the second arc-shaped coil (20) is provided with a second wire hole (211) for the cable (40) to pass through.

7. The coil arrangement of claim 6, wherein The first wire hole (111) of the first hard shell (11) is in the pivot slot (110) of the first arc-shaped coil (10), and the second wire hole (211) of the second hard shell (21) is in the pivot slot (110) of the second arc-shaped coil (20).

8. The coil arrangement of claim 7, wherein, The connecting piece (32) of the screwing mechanism (30) is provided with a wire slot (320) corresponding to the first wire hole (111) and the second wire hole (211), for accommodating the cable (40) passing out of the first wire hole (111) and the second wire hole (211).

9. The coil arrangement of any one of claims 1 to 8, characterized in that The coil device further comprises a locking mechanism (50) arranged between the second arc-shaped coils (20), so as to releasably lock one of the second arc-shaped coils (20) to another of the second arc-shaped coils (20) through the locking mechanism (50).

10. The coil arrangement of claim 9, wherein, The screwing mechanism (30) further comprises an elastic element (33) arranged between the first arc-shaped coil (10) and the second arc-shaped coil (20), wherein the elastic element (33) is used to apply a torsional force to the second arc-shaped coil (20), so that the second arc-shaped coil (20) is automatically rotated relative to the first arc-shaped coil (10) to automatically switch to the open-loop structure (102).

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