Magnetic resonance head coil device

Abstract

The invention relates to the technical field of magnetic resonance, in particular to a magnetic resonance head coil device. The apparatus includes: a first coil part configured to cover and support a head from a rear side of the head; a fourth coil component configured to be detachably joined to the first coil component, a portion of the fourth coil component covering a front side of the head when the fourth coil component is joined to the first coil component; and a third coil part connected to the first housing and having a deformable flexible structure, the third coil part being configured to deform by being pressed toward the top of the head by the fourth coil part when the fourth coil part is joined to the first coil part, and thereby cover the top of the head. According to the coil device provided by the invention, the magnetic resonance signal from the head of the subject can be well collected from the top side of the head, and the quality of magnetic resonance imaging of the head can be improved.

Description

Technical Field

[0001] This application relates to the field of nuclear magnetic resonance technology, and particularly to a magnetic resonance head coil device. Background Art

[0002] The magnetic resonance coil device mainly consists of a coil and a coil carrier, and is one of the important devices of the magnetic resonance system. It can be used to receive magnetic resonance signals from an examined part such as a human head, so that the magnetic resonance system can process the signal to reconstruct a magnetic resonance image corresponding to the examined part.

[0003] The patent document with the publication number CN114114110A (hereinafter referred to as Patent Document 1) discloses a magnetic resonance coil device for the head of an examinee, which can be used for magnetic resonance imaging of the temporomandibular joint and / or cochlea of the head.

[0004] However, in the above Patent Document 1, the two flexible coil components of the coil device cannot well cover the top of the examinee's head. Therefore, it is not suitable for application scenarios that require collecting head magnetic resonance signals from the top of the head, such as the application scenario of magnetic resonance imaging of the brain. Summary of the Invention

[0005] In order to solve at least one of the above technical problems, this application proposes a magnetic resonance head coil device.

[0006] The magnetic resonance head coil device proposed in this application includes:

[0007] A first coil component, configured to cover and support the head from the rear side of the head;

[0008] A fourth coil component, configured to be detachably joined to the first coil component, and when the fourth coil component is joined to the first coil component, a part of the fourth coil component covers the front side of the head;

[0009] A third coil component, connected to the first housing on the top of the head side of the head, and being a deformable flexible structure, and configured to be deformed by being pressed toward the top of the head by another part of the fourth coil component when the fourth coil component is joined to the first coil component, and thereby cover the top of the head.

[0010] In some possible implementation manners, the four-coil component is configured to be joined to the first coil component by moving toward the top of the head along the body length direction of the examinee, and to be separated from the first coil component by moving away from the top of the head along the body length direction.

[0011] In some possible embodiments, the four-coil component is configured to engage with the first coil component by moving from the front side of the head toward the head, and to separate from the first coil component by moving away from the head toward the front side of the head.

[0012] In some possible embodiments, a part of the fourth coil component has coils, and another part of the fourth coil component does not have coils.

[0013] In some possible embodiments, the first coil component includes:

[0014] A first housing having a head support surface for supporting the head;

[0015] A first coil received in the first housing;

[0016] The third coil component includes:

[0017] A third housing, which is a deformable flexible housing;

[0018] A third coil received in the third housing and configured to deform following the deformation of the third housing;

[0019] Wherein, a part of at least one of the third coils extends into the first housing and overlaps with a corresponding part of the first coil.

[0020] In some possible embodiments, the fourth coil component includes:

[0021] A fourth housing;

[0022] A fourth coil completely received in the fourth housing;

[0023] When the fourth coil component engages with the first coil component, a part of the fourth coil component covers the front side of the head at an interval.

[0024] A part of the fourth coil component has:

[0025] A first hole for exposing the eyes of the subject, and at least one of the fourth coils is arranged around the first hole;

[0026] A second hole for exposing the mouth of the subject, and at least one of the fourth coils is arranged around the second hole.

[0027] In some possible embodiments, it includes:

[0028] Two second coil components are respectively connected to the first coil component on the left and right sides of the head, and are deformable flexible structures. One of the two second coil components is configured to cover the left side of the head by deforming towards the other, and the other is configured to cover the right side of the head by deforming towards the one.

[0029] In some possible embodiments, the third coil portion has a first side portion and a second side portion that are oppositely arranged in the left-right direction of the subject, and the second coil component has a third side portion and a fourth side portion that are oppositely arranged in the body length direction of the subject;

[0030] When the fourth coil component is joined to the first coil component, the first side portion overlaps with the third side portion of one of the second coil components inside the one second coil component, the second side portion overlaps with the third side portion of the other second coil component inside the other second coil component, and the two third side portions respectively press the first side portion and the second side portion towards the head.

[0031] In some possible embodiments, the second coil component includes:

[0032] A second housing, which is a deformable flexible housing;

[0033] A second coil, which is housed in the third housing and is configured to deform following the deformation of the second housing;

[0034] Wherein, a part of at least one of the second coils extends into the first housing and overlaps with the corresponding first coil portion;

[0035] Based on the overlap between the first side portion and the third side portion of the one second coil component, at least one of the third coils and the corresponding second coil partially overlap with each other at the position where the first side portion and the third side portion overlap.

[0036] In some possible embodiments, the fourth coil component is configured to: after the two second coil components respectively cover the left and right sides of the head, be joined to the first coil component, and when the second coil component deforms away from the head under the action of its own elastic restoring force, inhibit the away deformation by blocking the second coil portion.

[0037] According to the magnetic resonance head coil device provided by the present application, it can well collect magnetic resonance signals from the head of the subject from the top of the head side, which helps to improve the quality of head magnetic resonance imaging. Description of the Drawings

[0038] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present application and do not limit the present application.

[0039] Figure 1 It is a schematic structural diagram of a magnetic resonance head coil device provided by the first embodiment of the present application.

[0040] Figure 2 is Figure 1 the front view of.

[0041] Figure 3 is Figure 1 the exploded schematic diagram of the magnetic resonance head coil device in.

[0042] Figure 4 is Figure 3 the schematic structural diagram of a part of.

[0043] Figure 5 is Figure 4 the schematic structural diagram after removing the meshing component and its mounting seat on one side in.

[0044] Figure 6 is Figure 5 the partial enlarged view of.

[0045] Figure 7 is Figure 4 the schematic structural diagram after removing a part of.

[0046] Figure 8 is Figure 7 the partial enlarged view of.

[0047] Figure 9 is Figure 4 the schematic structural diagram after removing the second coil component on one side in.

[0048] Figure 10 is Figure 9 the partial enlarged view of.

[0049] Figure 11 It is the RF coil layout schematic diagram of the first to third coil components provided by the embodiments of the present application.

[0050] Figure 12 It is a schematic structural diagram of a magnetic resonance head coil device provided by the second embodiment of the present application.

[0051] Figure 13 is Figure 12 the side view of.

[0052] Figure 14 is Figure 12 the exploded schematic diagram of the magnetic resonance head coil device in.

[0053] Figure 15 is Figure 14 a side view of

[0054] Explanation of reference numerals in the drawings:

[0055] DR1 - body length direction, DR2 - arrangement direction;

[0056] 1000 - magnetic resonance head coil device;

[0057] 100 - first coil component, 200 - second coil component, 300 - third coil component, 400 - fourth coil component, 500 - locking mechanism;

[0058] 101 - first housing, 102 - first coil, 103 - head support surface;

[0059] 201 - second housing, 202 - second coil, 200A - third side, 200B - fourth side, 201A - inner surface, 201B - outer surface;

[0060] 301 - third housing, 302 - third coil, 300A - first side, 300B - second side;

[0061] 401 - first hole, 402 - second hole;

[0062] 501 - toothed belt, 502 - engaging member, 503 - track, 504 - carriage, 505 - rotating shaft;

[0063] 51 - first cog, 51A - first side, 51B - second side;

[0064] 52 - second cog, 52A - third side, 52B - fourth side;

[0065] 53 - tooth gap;

[0066] 54 - first extension arm, 55 - second extension arm;

[0067] 1 - support, 2 - airbag. Detailed implementation mode

[0068] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present application without creative efforts fall within the scope of protection of the present application. It can be understood that, without conflict, some technical means described in the various embodiments herein may be replaced or combined with each other.

[0069] In the description of the present application, if there are terms such as "first" and "second", they are only used to distinguish the described objects and do not have any sequential or technical meanings. Thus, the objects defined with "first", "second", etc. may explicitly or implicitly include one or more such objects. Moreover, for example, the term "first element" itself does not imply the existence of a "second element", and the term "second element" itself does not imply the existence of a "first element". In addition, similar terms such as "one" or "a" do not indicate a quantity limitation but indicate the existence of at least one, and "a plurality" means not less than two.

[0070] Figures 1 to 11 There is shown a magnetic resonance head coil device 1000 (hereinafter, sometimes simply referred to as device 1000) provided according to a first embodiment of the present application, which is configured to receive magnetic resonance signals from the head of a subject and transmit the magnetic resonance signals to other devices of a magnetic resonance system, so that the magnetic resonance system obtains a magnetic resonance image of the subject's head based on the magnetic resonance signals by using an image reconstruction technique. The device 1000 mainly includes a first coil component 100, a second coil component 200, a third coil component 300, and a fourth coil component 400.

[0071] The first coil component 100 is configured to cover and support the head of the subject from the rear side of the subject's head. In practical applications, the device 1000 can be positioned on the examination bed of the magnetic resonance system, and the subject lies on the examination bed in a supine position, and the head of the subject is supported on the first coil component 100. Thus, the coils in the first coil component 100 can acquire magnetic resonance signals behind the head of the subject.

[0072] Specifically, the first coil component 100 includes a first housing 101 and a plurality of first coils 102 (such as a circular RF coil or a butterfly RF coil) received (e.g., fully received or partially received) within the first housing 101. During magnetic resonance examination, the first coils 102 are adjacent to the subject's head on the rear side to receive magnetic resonance signals from the subject's head with high quality. The first housing 101 has sufficient rigidity so as not to collapse due to the downward pressure of the subject's head during use. The first housing 101 has a head support surface 103 for supporting the subject's head. The head support surface 103 is a part of the outer surface of the first housing 101 and is formed as a concave surface complementary to the shape of the back of the subject's head. The aforementioned first coils 102 are arranged along the extending direction of the concave surface. The head support surface 103 can be a soft surface. In addition, the first housing 101 has a relatively large internal space. In addition to receiving the first coils 102, the internal space also receives a plurality of electrical components coupled to the first coils 102. The plurality of electrical components include, for example, a circuit board on which a capacitor and an inductor are mounted.

[0073] The second coil components 200 are flexible structures that can be deformed, and two of them are provided in total. The two second coil components 200 are arranged at intervals in the left - right direction of the subject, and are mechanically connected to the first coil component 100 on the left and right sides of the subject's head respectively. Among them, the second coil component 200 on the left is configured to cover the left side of the subject's head by deforming towards the second coil component 200 on the right, that is, by deforming closer to the subject's head, and the second coil component 200 on the right is configured to cover the right side of the subject's head by deforming towards the second coil component 200 on the left, that is, by deforming closer to the subject's head. Thus, the coils within the two second coil components 200 can respectively collect magnetic resonance signals from the subject's head on the left and right sides of the subject's head. In addition, the second coil component 200 has an inner side surface 201A facing the subject's head and an outer side surface 201B facing away from the subject's head.

[0074] Specifically, the second coil component 200 includes a deformable and flexible second housing 201 and a plurality of second coils 202 received within the second housing 201. The second coils 202 can deform following the deformation of the second housing 201. During magnetic resonance examination, the two second coil components 200 can respectively cover the left and right sides of the subject's head in a deformed state relatively well (e.g., substantially completely fitting), so that the second coils 202 within them are adjacent to the subject's head on the left and right sides respectively to receive magnetic resonance signals from the subject's head with high quality.

[0075] The third coil component 300 is also a deformable flexible structure and is mechanically connected to the first coil component 100 on the top side of the subject's head. In use, the third coil component 300 can cover the top of the subject's head to acquire magnetic resonance signals from the top side.

[0076] Specifically, the third coil component 300 includes a deformable flexible third housing 301 and a plurality of third coils 302 housed in the third housing 301. The third coils 302 can deform following the deformation of the third housing 301. During magnetic resonance examination, the third coil component 300 can preferably cover the top of the subject's head in a deformed state, so that the third coils 302 therein are adjacent to the subject's head on the top side to receive magnetic resonance signals from the subject's head with high quality.

[0077] The second housing 201 and the third housing 301 can be mainly formed of fabric, non-woven fabric or leather and can have a certain toughness.

[0078] The fourth coil component 400 is configured to: move toward the top of the subject's head along the body length direction DR1 of the subject to engage with the first coil component 100, and move away from the top along the body length direction DR1 to separate from the first coil component 100. Wherein, when the fourth coil component 400 engages with the first coil component 100, a part of the fourth coil component 400 (i.e., Figure 1 the top end part of the fourth coil component 400 in this case) covers the front side of the subject's head at an interval to acquire magnetic resonance signals from the subject's head on the front side (facial side) of the subject's head.

[0079] Specifically, the fourth coil component 400 includes a fourth housing with omitted markings and a plurality of fourth coils (not shown) completely housed in the fourth housing. And the top end part of the fourth coil component 400 is spaced from the first coil component 100 (more specifically, the head support surface 103 defined by the first housing 101) by a distance greater than the front-back dimension of a general head shape, so that the device 1000 can be adapted to as many subjects with different head shapes as possible. During magnetic resonance examination, by moving the fourth coil component 400 along the body length direction DR1 toward the top of the subject's head, the fourth coil component 400 and the first coil component 100 are engaged with each other (for example, snapped together). And in this engaged state, the flexible third coils 302 are pressed by the fourth coil component 400 toward the top of the subject's head and deformed, and thus preferably cover the top of the subject's head. In addition, the top end part of the fourth coil component 400 covers the front side of the subject's head at an interval to acquire magnetic resonance signals from the subject's head from the front side by using the fourth coils housed in the top end part.

[0080] Similar to the first housing 101, the fourth housing also has sufficient rigidity. On the one hand, the rigid fourth housing can apply sufficient pressing force to the flexible third coil component 300, so that the third coil component 300 is stably held at the top position of the subject's head, thereby ensuring the quality of magnetic resonance examination. On the other hand, the rigid fourth housing can firmly support the fourth coil therein without collapsing, so that during magnetic resonance examination, the position of the fourth coil relative to the subject's head remains stable, further ensuring the quality of magnetic resonance examination.

[0081] In the use state, the first coil component 100, the second coil component 200, the third coil component 300, and the fourth coil component 400 define a space for receiving the subject's head.

[0082] In some other embodiments, the fourth coil component 400 can be replaced by an element that does not have an RF coil (fourth coil) at all. This element has all other functions of the fourth coil component 400 except for the function of collecting magnetic resonance signals. For example, the fourth coil component 400 can be replaced by a simple fourth housing. In other words, the RF coil in the fourth coil component 400 can be completely omitted. However, in the case where the RF coil is completely omitted, it is not appropriate to call it the fourth coil component 400 anymore, and it can be called an element for pressing or holding the third coil component 300.

[0083] The first housing 101 and the fourth housing can be mainly formed of plastic.

[0084] A part of the fourth coil component 400 has two first holes 401 for the eyes of the subject to be exposed and a second hole 402 for the mouth of the subject to be exposed, so as to bring a better user experience to the subject. And two annular fourth coils are respectively arranged around the first hole 401, and another annular fourth coil is arranged around the fourth hole.

[0085] Please refer to Figure 11 , in some embodiments, each second coil component 200 has a total of four second coils 202, and a part of two of the second coils 202 extends into the first housing 101 and overlaps with the corresponding part of the first coil 102 to decouple. The third coil component 300 has a total of four third coils 302, and a part of two of the third coils 302 extends into the first housing 101 and overlaps with the corresponding part of the first coil 102 to decouple. Through such a design, the coils in the first coil component 100 and the second coil component 200, and the coils in the first coil component 100 and the third coil component 300 are well matched to form an RF coil array with excellent performance (for example, excellent decoupling performance), which further helps the device 1000 to obtain high-quality magnetic resonance signals.

[0086] The apparatus 1000 further includes two locking mechanisms 500 respectively corresponding to the two second coil members 200. Each locking mechanism 500 includes two toothed belts 501 and an engaging member 502. The toothed belts 501 are provided on the outer side surface 201B and extend along the body length direction DR1 of the subject. The engaging member 502 is connected to the first coil member 100 in a manner capable of rotating around the body length direction DR1, and the engaging member 502 is located on the outer side surface 201B side of the second coil member 200 and can be engaged with different parts (i.e., different first teeth 51) of the toothed belt 501 at multiple positions around the body length direction DR1. The locking mechanism 500 has a locked state and a released state. In the locked state, the engaging member 502 is engaged with the toothed belt 501, and the second coil member 200 covers the subject's head and is pressed by the engaging member 502 toward the subject's head. In the released state, the engaging member 502 is disengaged from the toothed belt 501, thereby allowing the second coil member 200 to leave the subject's head. With such a design, during use, the operator can conveniently hold the second coil member 200 in the position covering the subject's head by using the locking mechanism 500.

[0087] More specifically, the engaging member 502 is connected to the first housing 101 of the first coil member 100 via a pin (not shown), and the pin extends along the body length direction DR1 and defines the rotation axis 505 line of the engaging member 502. The toothed belt 501 includes a plurality of first teeth 51 arranged in sequence in the direction around the body length direction DR1. Each first tooth 51 has a first side surface 51A and a second side surface 51B oppositely arranged in the arrangement direction DR2 of the plurality of teeth, wherein the first side surface 51A is closer to the front side of the subject than the second side surface 51B. And, the first side surface 51A and the arrangement direction DR2 define a first acute angle (not shown), and the second side surface 51B and the arrangement direction DR2 define a second acute angle (not shown). The opening directions of the first acute angle and the second acute angle face the rear side of the subject. When the locking mechanism 500 is in the locked state, the engaging member 502 is engaged with the second side surface 51B of the first tooth 51.

[0088] With such a design, on the one hand, the operator only needs to rotate the engaging member 502 towards the subject's head. After the second coil member 200 abuts against the appropriate position of the subject's head, the engaging member 502 will automatically engage with the toothed belt 501 (more specifically, the first tooth 51 at the corresponding position on the toothed belt 501), and the reaction force of the subject's head on the second coil member 200 enables the engagement between the engaging member 502 and the toothed belt 501 to be stably maintained. On the other hand, when the locking mechanism 500 is in the locked state, the operator can press the second coil member 200 towards the subject's head, and then easily disengage the engagement between the engaging member 502 and the toothed belt 501, switching the locking mechanism 500 to the released state.

[0089] It can be understood that the locking mechanism 500 of this configuration can adapt to different head shapes, thus ensuring the versatility of the device 1000 for different subjects. During use, the engagement position between the engaging member 502 and the toothed belt 501 depends on the size of the subject's head.

[0090] Moreover, the first acute angle is smaller than the second acute angle. With such a design, it helps to increase the arrangement density of the first teeth 51 while ensuring the structural strength of each first tooth 51, and further increases the locking gears of the locking mechanism 500. For example, the first acute angle can be 45°, and the second acute angle can be 80°.

[0091] The engaging member 502 has second teeth 52, and the second teeth 52 have a third side and a fourth side. When the locking mechanism 500 is in the locked state, the third side and the fourth side are relatively arranged in the arrangement direction DR2, and the third side is closer to the front side of the subject than the fourth side. The third side and the arrangement direction DR2 define a third acute angle (not shown), and the second side 51B and the arrangement direction DR2 define a fourth acute angle (not shown). The opening directions of the third acute angle and the third acute angle face the front side of the subject.

[0092] Moreover, the third acute angle is greater than the fourth acute angle. With such a design, even when the size of the second teeth 52 (especially the size in the arrangement direction DR2) is set to be relatively small, it can ensure that the second teeth 52 have sufficient structural strength.

[0093] When the locking mechanism 500 is in the locked state, the third side of the engaging member 502 engages with the second side 51B of the first tooth 51.

[0094] The third acute angle is equal to the second acute angle, and the fourth acute angle is equal to the first acute angle. An inter-tooth gap 53 is formed between every two adjacent first teeth 51, and the inter-tooth gap 53 is defined by a first side surface 51A of one first tooth 51 and a second side surface 51B of another first tooth 51. In the arrangement direction DR2, the size of the inter-tooth gap 53 is smaller than the size of the second tooth 52. In this way, the second teeth 52 can be tightly engaged between two adjacent first teeth 51, which helps to improve the meshing stability between the meshing member 502 and the toothed belt 501.

[0095] The third coil member 300 has a first side portion 300A and a second side portion 300B that are oppositely arranged in the left-right direction of the subject, and the second coil member 200 has a third side portion 200A and a fourth side portion 200B that are oppositely arranged in the body length direction DR1 of the subject. When the apparatus 1000 is in the use state of performing a magnetic resonance examination on the subject's head, the first side portion 300A overlaps with the third side portion 200A of the left second coil member 200 on the inner side (i.e., the side of the second coil member 200 facing the subject's head), and the second side portion 300B overlaps with the third side portion 200A of the right second coil member 200 on the inner side. And under the action of the aforementioned locking mechanism 500, the two third side portions 200A press the first side portion 300A and the second side portion 300B toward the patient's head respectively. Through such a design, the attachment degree of the third coil member 300 to the patient's head can be enhanced, which helps to improve the quality of the magnetic resonance examination.

[0096] In some embodiments, when the apparatus 1000 is in the use state of performing a magnetic resonance examination on the subject's head, based on the overlap of the first side portion 300A of the third coil member 300 with the third side portion 200A of the left second coil member 200, and the overlap of the second side portion 300B of the third coil member 300 with the third side portion 200A of the left second coil member 200, it is such that: at least one third coil 302 and the corresponding second coil 202 partially overlap each other at the position where the first side portion 300A and the corresponding third side portion 200A overlap to decouple, and at least another third coil 302 and the corresponding second coil 202 overlap each other at the position where the second side portion 300B and the corresponding third side portion 200A overlap to decouple.

[0097] In addition, the locking mechanism 500 further includes a holding structure that connects the meshing member 502 and the toothed belt 501. This holding structure prevents the meshing member 502 from being completely separated from the toothed belt 501 and allows the meshing member 502 to move relative to the toothed belt 501 in the arrangement direction DR2.

[0098] The holding structure includes a rail 503 and a carriage 504. The rail 503 is provided on the side of the toothed belt 501, more specifically, between two toothed belts 501, and the rail 503 extends in the direction around the body length direction DR1 (which is also the arrangement direction DR2). The carriage 504 is provided on the side of the engaging member 502 and engages with the rail 503.

[0099] More specifically, both the two toothed belts 501 and the rail 503 are formed on a plate-like member (not shown), and the rail 503 is an elongated hole penetrating the plate-like member. The carriage 504 is formed in a T-shape with two extending arms perpendicular to each other. Among them, the first extending arm 54 extends from the engaging member 502 and is slidably inserted into the elongated hole. The middle part of the second extending arm 55 is connected to the protruding end of the first extending arm 54 on the side opposite to the engaging member 502 of the elongated hole. And, the first extending arm 54 has a length greater than the thickness of the plate member. Thus, depending on the length of the first extending arm 54, the elongated hole allows the carriage 504 and the further engaging member 502 to move within a specified range in the direction away from and towards the subject's head (perpendicular to the arrangement direction DR2) relative to the toothed belt 501. Thus, the engaging member 502 and the toothed belt 501 can be disengaged from the engaged state.

[0100] In some embodiments, the fourth coil component 400 can be configured as follows: on the one hand, after the two second coil components 200 are respectively covered on the left and right sides of the subject's head and the locking mechanisms 500 on both sides are operated and in the aforementioned locked state, it is joined to the first coil component 100 by moving towards the top of the subject's head along the body length direction DR1; on the other hand, when the locking mechanism 500 is accidentally unlocked (for example, due to an unexpected movement of the subject's head, causing one or both locking mechanisms 500 to be unintentionally unlocked), the second coil component 200 may deform away in the direction away from the subject's head under its own elastic restoring force, and the fourth coil component 400 can suppress such away deformation by blocking the second coil part 200. For example, please refer to Figure 1 and Figure 3 , the left and right sides of the fourth coil component 400 may not be respectively configured with downwardly extending flanges, so as to use the flanges to prevent the second coil part 200 from undergoing the aforementioned away deformation. In this way, even if the aforementioned accident occurs during use, since the away movement of the second coil component 200 is suppressed, the quality of the magnetic resonance image can still be guaranteed to a certain extent.

[0101] Next, please refer to Figures 12 to 15 , 12 to Figure 15Fig. 0 shows a magnetic resonance head coil device 1000 provided according to the second embodiment of the present application. It has a structure similar to that of the magnetic resonance head coil device 1000 in the first embodiment and can be understood with reference to the description of the first embodiment. For the sake of simplicity, the same or similar components are given the same or similar reference numerals, and the repetitive detailed description of their identical parts is omitted. Hereinafter, the differences between this embodiment and the first embodiment will be mainly described.

[0102] In this embodiment, the fourth coil component is configured to move from top to bottom, that is, from the front side (or the front side of the face) of the subject's head to the rear side, that is, towards the subject's head, and is installed on the first coil component via a fastening mechanism (not shown). And by unlocking the fastening mechanism, the fourth coil component is allowed to move from bottom to top (that is, move away from the head towards the front side of the head) and separate from the first coil component.

[0103] In this embodiment, the magnetic resonance head coil device 1000 further includes two supports 1 and two airbags 2 respectively supported by these two supports 1. The two supports 1 are respectively connected to the first coil component 100 on the left and right sides of the subject's head, and the two second coil components 200 are located between these two supports 1. In use, the airbag 2 expands by being inflated, so as to press the second coil component 200 towards the head and deform it.

[0104] In some embodiments, the support 1 can be formed in a plate shape and is integrally formed with the first coil housing 101.

[0105] The top contour of the support 1 is formed to correspond to the contours on both sides of the bottom of the fourth coil component 400, so that these two supports 1 can stably support the fourth coil component 400 on the left and right sides of the subject's head during use.

Claims

1. A magnetic resonance head coil device for receiving magnetic resonance signals from a subject's head, characterized in that: The coil comprises: a first coil component configured to cover and support the head from the rear side of the head; a fourth coil component configured to be detachably joined to the first coil component, and a portion of the fourth coil component covers the front side of the head when the fourth coil component is joined to the first coil component; The third coil component is connected to the first shell on the top side of the head and is a deformable flexible structure. It is configured to be pressed toward the top of the head by another part of the fourth coil component when the fourth coil component is joined to the first coil component, thereby covering the top of the head.

2. The coil device according to claim 1, characterized in that The four-coil unit is configured to be joined to the first coil unit by moving toward the top of the head along the body length direction of the subject, and to be separated from the first coil unit by moving away from the top of the head along the body length direction.

3. The coil device according to claim 1, characterized in that The four-coil component is configured to be joined to the first coil component by moving toward the head from the front side of the head, and to be separated from the first coil component by moving away from the head toward the front side of the head.

4. The coil device according to claim 1, characterized in that The part of the fourth coil component has a coil, and the other part of the fourth coil component has no coil.

5. The coil device according to claim 1, characterized in that The first coil component comprises: A first shell having a head support surface for supporting the head; A first coil is housed in the first housing; The third coil component comprises: The third shell is a deformable flexible shell; a third coil housed in the third housing and configured to deform along with the deformation of the third housing; A portion of at least one of the third coils extends into the first shell and overlaps with a portion of the corresponding first coil.

6. The coil device according to claim 5, characterized in that The fourth coil component comprises: a fourth shell; a fourth coil, completely housed in the fourth housing; When the fourth coil component is joined to the first coil component, the portion of the fourth coil component covers the front side of the head at intervals; The portion of the fourth coil component has: a first hole for exposing the eye of the subject, and at least one fourth coil is arranged around the first hole; The second hole is used to expose the mouth of the subject, and at least one fourth coil is arranged around the second hole.

7. The coil device according to any one of claims 1 to 6, characterized in that include: Two second coil components are connected to the first coil component on the left and right sides of the head, respectively, and are deformable flexible structures. One of the two second coil components is configured to cover the left side of the head by deforming toward the other, and the other is configured to cover the right side of the head by deforming toward the one.

8. The coil device according to claim 7, characterized in that The third coil part has a first side portion and a second side portion disposed opposite to each other in the left-right direction of the subject, and the second coil part has a third side portion and a fourth side portion disposed opposite to each other in the length direction of the subject; When the fourth coil component is joined to the first coil component, the first side portion overlaps with the third side portion of one of the second coil components on the inner side of the second coil component, the second side portion overlaps with the third side portion of the other second coil component on the inner side of the other second coil component, and the two third sides press the first side portion and the second side portion toward the head, respectively.

9. The coil device according to claim 8, characterized in that The second coil component comprises: The second shell is a deformable flexible shell; a second coil housed in the third housing and configured to deform in accordance with the deformation of the second housing; wherein a portion of at least one of the second coils extends into the first housing and overlaps with a portion of the corresponding first coil; Based on the overlap of the first side portion with the third side portion of one of the second coil components, at least one of the third coils and the corresponding second coil partially overlap each other at a position where the first side portion overlaps the third side portion.

10. The coil device according to claim 7, characterized in that The fourth coil component is configured to be joined to the first coil component after the two second coil components respectively cover the left and right sides of the head, and when the second coil component is deformed away from the head under the action of its own elastic restoring force, the deformation is suppressed by blocking the second coil part.

Images