CN114114110A

CN114114110A - Magnetic resonance coil device for imaging temporomandibular joint and cochlear

Info

Publication number: CN114114110A
Application number: CN202111589395.XA
Authority: CN
Inventors: 曹代荣; 郭伟; 王硕; 陈潭辉; 黄楠; 黄宏杰; 王峰; 王海涛
Original assignee: SUZHOU MEDCOIL HEALTHCARE CO LTD
Current assignee: SUZHOU MEDCOIL HEALTHCARE CO LTD
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-03-01

Abstract

The present application relates to a magnetic resonance coil device for temporomandibular joint and cochlear imaging, the device comprising: a bottom shell having a recessed head recess adapted to receive a subject's head; the first flexible sheath and the second flexible sheath are respectively connected to the left side and the right side of the head recess, and both the first flexible sheath and the second flexible sheath can be bent and deformed around the head and neck direction of a subject; and the coil units are arranged in the bottom shell, the first flexible sheath and the second flexible sheath. The device has wide applicability and high imaging quality.

Description

Magnetic resonance coil device for imaging temporomandibular joint and cochlear

Technical Field

The application relates to a magnetic resonance coil device for imaging temporomandibular joint and cochlear, belonging to the field of magnetic resonance imaging.

Background

A magnetic resonance system is a medical imaging apparatus in which a Radio Frequency (RF) receive coil is a very important component of the magnetic resonance system. The effect of the radio frequency receive coil in this is comparable to that of the adult eye, with the resulting sharpness of the image being directly proportional to its signal-to-noise ratio (sensitivity). To improve the image clarity (or signal-to-noise ratio, or sensitivity), the primary starting point for a typical coil design is to determine the shape and lumen size of the coil, which cannot be too small or too small. Because if the coil size is too large, the distance between the coil unit and the human body part is relatively far, thereby reducing the definition of the magnetic resonance image; and too small, there may be a significant proportion of the specific part of the patient that cannot be placed inside the coil. The primary principle of coil design is to make the coil as close as possible to the scanning site or object, while meeting the size of the scanning site or object. For example, a head coil is designed with dimensions that allow the head of most patients (e.g., over 95% of patients) to be placed within the coil.

The radio frequency receive coils may be named according to the name of the scanning site or subject, and are various. When scanning different parts of the human body, special coils are generally needed to obtain the best image effect, for example, the coil for scanning the head is called a head coil, the coil for scanning the knee joint is called a knee joint coil, and the coil for scanning the hand is called a hand coil or a wrist coil. The magnetic resonance scanning adopts a special coil, which is beneficial to greatly improving the performance of clinical images.

Both the temporomandibular joint and the cochlea are located on the human head, and therefore, in current hospital clinical examinations, the head coil is commonly selected for the examination. However, the standard head coil does not have a specific professional design according to the particularity of the 2 parts because the design considers the universality of the whole head imaging, and as the requirement of clinical examination on the image quality is higher, the temporomandibular joint and cochlear images acquired by the standard head coil are difficult to meet the higher quality requirement in the industry at present.

Disclosure of Invention

The technical problem that this application was solved is: the magnetic resonance coil device for imaging the temporomandibular joint and the cochlear is provided, and the device is wide in applicability and high in imaging quality.

The technical scheme of the application is as follows:

a magnetic resonance coil apparatus for temporomandibular joint and cochlear imaging comprising:

a bottom shell having a recessed head recess adapted to receive a subject's head;

a first flexible sheath and a second flexible sheath that are respectively connected to left and right sides of the head recess, and both of which are capable of bending deformation around the head and neck direction of the subject; and

a plurality of coil units disposed within the bottom shell, the first flexible jacket, and the second flexible jacket.

In an alternative design, the outer side of the first flexible sheath is provided with a first connecting element, and the outer side of the second flexible sheath is provided with a second connecting element;

the magnetic resonance coil device further comprises a U-shaped elastic clamping arm, and a third connecting element and a fourth connecting element which are suitable for being detachably connected with the first connecting element and the second connecting element are respectively arranged at two ends of the elastic clamping arm;

the first connecting element, the second connecting element, the third connecting element and the fourth connecting element are all clamping elements.

In an alternative design, the middle portion of the elastic clip arm is rotatably connected to a first portion of the bottom shell around the axis of the subject in the left-right direction, the first portion being on a side of the head recess away from the neck of the subject.

In an alternative embodiment, the middle section of the spring clip arm can only be pivoted about the axis relative to the first section.

In an alternative design, the bottom shell includes a bottom shell body and a projection projecting upward from the bottom shell body, the projection has a curved surface adapted to the vertex of the subject on one side in the head-neck direction, and the vertex block has the first portion.

In an alternative design, the bottom shell further has a recessed neck recess adapted to receive the neck of the subject, and the neck recess and the first portion are respectively disposed on opposite sides of the head recess in the head-neck direction.

In an alternative design, the plurality of coil units includes a first coil group, a second coil group, and a third coil group arranged in order along the head-neck direction from the head recess to the neck recess;

the first coil group comprises a plurality of first coil units which are sequentially arranged in the first flexible sheath, the bottom shell and the second flexible sheath, any two adjacent first coil units are partially overlapped, and the first coil units positioned in the bottom shell are arranged below the head recess and correspond to the head recess in shape;

the second coil group comprises a plurality of second coil units which are sequentially arranged in the first flexible sheath, the bottom shell and the second flexible sheath, any two adjacent second coil units are partially overlapped, each first coil unit is partially overlapped with the two adjacent second coil units, and the second coil units positioned in the bottom shell are arranged below the head recess and correspond to the shape of the head recess;

the third coil group comprises at least one third coil unit, the at least one third coil unit is completely arranged in the bottom shell and positioned below the neck recess, and each third coil unit is respectively arranged with two adjacent second coil units in a partially overlapped mode.

In an alternative design, the number of the first coil units is 7, the number of the second coil units is 8, the number of the neck coils is 1, and the first coil units, and the third coils are the same in size.

In an optional design, the first flexible sheath is provided with three first linear folding grooves which penetrate through the first flexible sheath along the head and neck direction and are arranged in parallel in a direction perpendicular to the head and neck direction, and the second flexible sheath is provided with three second linear folding grooves which penetrate through the second flexible sheath along the head and neck direction and are arranged in parallel in a direction perpendicular to the head and neck direction;

each of the first coil units has a first non-overlapping region that does not overlap with the rest of the first coil units, and each of the second coil units has a second non-overlapping region that does not overlap with the rest of the second coil units;

each first straight-line folding groove transversely spans a corresponding first non-overlapping area and a corresponding second non-overlapping area in the head and neck direction, and each second straight-line folding groove transversely spans a corresponding first non-overlapping area and a corresponding second non-overlapping area in the head and neck direction.

In an alternative design, the plurality of coil units includes a first coil group and a second coil group arranged along the head-neck direction from the head recess to the neck recess;

the first coil group comprises a plurality of first coil units which are sequentially arranged in the first flexible sheath, the bottom shell and the second flexible sheath, any two adjacent first coil units are partially overlapped, each first coil unit is provided with a first non-overlapping area which is not overlapped with the rest first coil units, and the first coil unit positioned in the bottom shell is arranged below the head recess;

the second coil group comprises a plurality of second coil units which are sequentially arranged in the first flexible sheath, the bottom shell and the second flexible sheath, any two adjacent second coil units are partially overlapped, each second coil unit is provided with a second non-overlapping area which is not overlapped with the rest second coil units, and the second coil units positioned in the bottom shell are arranged below the head recess;

the first flexible sheath is provided with a plurality of first linear folding grooves which penetrate through the first flexible sheath along the head and neck direction and are arranged in parallel in the direction perpendicular to the head and neck direction, and the second flexible sheath is provided with a plurality of second linear folding grooves which penetrate through the second flexible sheath along the head and neck direction and are arranged in parallel in the direction perpendicular to the head and neck direction;

The application has at least the following beneficial effects:

the flexible protective sleeve is characterized in that the bottom shell is provided with a head recess for accommodating the head of an examinee, the flexible protective sleeve capable of being bent and deformed is connected to two sides of the head recess respectively, and the bottom shell and the flexible protective sleeve are internally provided with coil units for acquiring magnetic resonance signals. When the flexible coil is used, the flexible sheaths with the two bendable sides capable of deforming can adapt to the size of the head of each examined person, and the coil units in the bottom shell and the two flexible sheaths can be close to the heads of all the examined persons as far as possible, so that the operation convenience of doctors and the comfort of patients are improved, and the signal-to-noise ratio of the coil and the quality of clinical images are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.

Fig. 1 is a perspective view of a magnetic resonance coil apparatus according to an embodiment of the present application in a non-use state.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a perspective view of the magnetic resonance coil device of fig. 1 in a use state.

Fig. 4 is a side view of fig. 3.

Fig. 5 is a schematic diagram of the arrangement of the coil units in the magnetic resonance coil apparatus of fig. 1.

Fig. 6 is a schematic view of fig. 5 after flattening.

Figure 7 is a partial schematic view of a magnetic resonance coil apparatus according to another embodiment of the present application.

Figure 8 is a schematic diagram of the flattened arrangement of the coil units of the magnetic resonance coil arrangement of figure 7.

Description of reference numerals:

1-a first flexible sheath, 2-a second flexible sheath, 3-a bottom shell, 4-a first coil unit, 5-a second coil unit, 6-a third coil unit and 7-an elastic clamping arm;

101-a first rectilinear folded slot, 102-a first connection element;

201-a second straight folding groove, 202-a second connecting element;

301-head depression, 302-neck depression, 303-bump;

401-a first non-overlapping region, 501-a second non-overlapping region;

701-third connecting element, 702-fourth connecting element.

Detailed Description

In order to make the objects, 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 drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present application and claims, the terms "first," "second," and the like, if any, are used solely to distinguish one from another as between described objects and not necessarily in any sequential or technical sense. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two.

In the description of the present application and claims, the terms "connected," "secured," "housed," and the like are used broadly unless otherwise indicated. For example, "connected" may be a separate connection or may be integrally connected; can be directly connected or indirectly connected through an intermediate medium; may be non-detachably connected or may be detachably connected. For example, "accommodated" does not necessarily mean that the entire body is completely accommodated, and the concept also includes a partial accommodation case in which a part protrudes outward. The specific meaning of the foregoing terms in the present application can be understood by those skilled in the art as appropriate.

In the description of the present application and in the claims, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc. based on the orientation or positional relationship shown in the drawings, it is only for the convenience of clearly and simply describing the present application, and it is not indicated or implied that the elements referred to must have a specific direction, be constructed and operated in a specific orientation, and these directional terms are relative concepts for the sake of description and clarification and may be changed accordingly according to the change of orientation in which the elements in the drawings are placed. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements.

Embodiments of the present application will now be described with reference to the accompanying drawings.

Fig. 1 to 6 show a specific embodiment of the magnetic resonance coil apparatus of the present application for magnetic resonance imaging examination of the temporomandibular joint and cochlea of a subject. The magnetic resonance coil device includes a bottom case 3, a first flexible sheath 1, a second flexible sheath 2, and a plurality of coil units.

The bottom shell 3 has a recessed head recess 301, the head recess 301 being adapted to receive the head of a subject. The first flexible sheath 1 and the second flexible sheath 2 are connected to the left and right sides of the head recess 301, respectively, and both the first flexible sheath 1 and the second flexible sheath 2 are capable of bending deformation around the head and neck direction of the subject. For example, in fig. 1 to 4, the first flexible sheath 1 and the second flexible sheath 2 may be respectively bent and deformed along the straight folding groove provided thereon. A plurality of coil units are disposed inside the bottom case 3, the first flexible sheathing 1, and the second flexible sheathing 2. The head-neck direction refers to a direction from the head to the neck of the subject or a direction from the neck to the head of the subject.

In this embodiment, a downward head recess 301 is formed in the bottom case 3, the first flexible sheath 1 and the second flexible sheath 2 capable of bending and deforming are respectively connected to the left and right sides of the head recess 301, and a coil unit is disposed in the bottom case 3 and the two flexible sheaths. In use, the head recess 301 of the bottom shell 3 provides good head support for the subject, and the first and second

flexible sheaths

1, 2 may be flexed inwardly to lie against the sides of the subject's head. When the medical coil is used, the first flexible sheath 1 and the second flexible sheath 2 which can be bent and deformed at two sides can adapt to the size of the head of each examined person, and the coil units in the bottom shell 3, the first flexible sheath 1 and the second flexible sheath 2 can be close to the heads of all the examined persons as far as possible, so that the operation convenience of doctors and the comfort of patients are improved, and the signal-to-noise ratio of the coil and the quality of clinical images are improved.

Referring to fig. 1 to 4, in order to fixedly attach the first flexible sheath 1 and the second flexible sheath 2 after bending to both sides of the head of the subject and prevent the two flexible sheaths from scattering, in the embodiment, a first connecting element 102 is disposed on the outer side of the first flexible sheath 1, and a second connecting element 202 is disposed on the outer side of the second flexible sheath 2. Furthermore, the magnetic resonance coil apparatus further comprises a U-shaped elastic clamping arm 7, and both ends of the elastic clamping arm 7 are respectively provided with a third connecting element 701 adapted to be detachably connected with the first connecting element 102 and a fourth connecting element 702 adapted to be detachably connected with the second connecting element 202.

In use, after the head of the examinee enters the head recess 301 and is placed in a correct position, the third connecting elements 701 and the fourth connecting elements 702 at the two ends of the elastic clip arms 7 can be respectively connected with the first connecting elements 102 of the first flexible sheath 1 and the second connecting elements 202 of the second flexible sheath 2, so that the first flexible sheath 1 and the second flexible sheath 2 are respectively clamped and attached to the two sides of the head of the examinee by the elastic clamping force of the elastic clip arms 7.

Referring to fig. 1 to 4 again, in the present embodiment, the first connecting element 102, the second connecting element 202, the third connecting element 701 and the fourth connecting element 702 are all clamping elements. Specifically, the first connecting element 102 and the second connecting element 202 are clamping posts, and the third connecting element 701 and the fourth connecting element 702 are snap rings capable of detachably snap-fitting over the clamping posts.

To improve the structural integrity and convenience of use of the device, the present embodiment connects the middle portion of the elastic clip arm 7 to the first portion of the bottom case 3, which is on the side of the head recess 301 away from the neck of the subject, rotatably around the axis line of the subject in the left-right direction. Therefore, in a non-use state, the elastic clamping arm 7 can still be stably connected to the bottom shell 3 and is not easy to lose; when the connecting device is used, after the elastic clamping arm 7 is rotated to a proper position, the third connecting element 701 and the fourth connecting element 702 at the two ends of the elastic clamping arm 7 are aligned with the first connecting element 102 and the second connecting element 202 respectively by means of deformation of the elastic clamping arm 7 and then are connected in a buckling manner, which is particularly convenient.

Further, the middle portion of the elastic clip arm 7 is rotatable only about the axis with respect to the first portion. That is, the middle portion of the elastic clip arm 7 can only rotate in the direction around the axis line with respect to the first portion of the bottom case 3, and cannot move in other directions (e.g., left and right directions). This arrangement is advantageous: when using, this elasticity arm lock 7 is pressed close to the coil to the person's head of being examined, can also borrow this fixed person's head of being examined, can not produce motion artifact when making it examined, kills two birds with one stone.

Further, the bottom case 3 includes a bottom case 3 body and a projection 303 projecting upward from the bottom case 3 body, the projection 303 has a curved surface adapted to the vertex of the subject on one side in the head-neck direction, and the vertex block has the above-described first portion, that is, the above-described first portion is specifically on the vertex block. The projection 303 can prevent the head of the examinee from being too far back on the device, and the height of the middle switching part of the elastic clamping arm 7 is raised, so that the size of the elastic clamping arm 7 is reduced.

In another embodiment, the lower end of the projection 303 is rotatably connected (rotation angle lockable) to the bottom case 3 body about the axis line of the subject in the left-right direction. Therefore, the position of the middle part of the elastic clamping arm 7 can be adjusted, and the head size of the examinee can be better adapted.

In addition, referring to fig. 1 and 3 again, the bottom shell 3 further has a recessed neck recess 302 adapted to receive the neck of the subject, and the neck recess 302 and the first portion are respectively disposed on two opposite sides of the head recess 301 along the head and neck direction.

Referring to fig. 5 and 6, the plurality of coil units include a first coil group, a second coil group, and a third coil group sequentially arranged in a head-neck direction from a head recess 301 to a neck recess 302.

The first coil group includes a plurality of first coil units 4 arranged in sequence within the first flexible sheath 1, the bottom case 3, and the second flexible sheath 2. Any adjacent two first coil units 4 are partially overlapped to be decoupled. The first coil unit 4 located inside the bottom case 3 is disposed below the head recess 301 and corresponds to the shape of the head recess 301.

The second coil group includes a plurality of second coil units 5 arranged in sequence within the first flexible sheath 1, the bottom case 3, and the second flexible sheath 2. Any adjacent two second coil units 5 are partially overlapped to be decoupled. Each of the first coil units 4 is partially overlapped with two adjacent second coil units 5, respectively, for decoupling. The second coil unit 5 located inside the bottom case 3 is disposed below the head recess 301 and corresponds to the shape of the head recess 301.

The third coil group includes only one third coil unit 6, the third coil unit 6 is disposed in the bottom case 3 below the neck recess 302, and the third coil units 6 are respectively disposed to partially overlap with the adjacent two second coil units 5. In another embodiment, the third coil group includes only a plurality of third coil units 6, the plurality of third coil units 6 are all disposed in the bottom case 3 and located below the neck recess 302, and each third coil unit 6 is respectively disposed to partially overlap with two adjacent second coil units 5.

Specifically, the number of the first coil units 4 is 7, the number of the second coil units 5 is 8, and the first coil units 4, and the third coils are the same in size.

The first flexible sheath 1 is provided with three first linear folding grooves 101 penetrating the first flexible sheath 1 in the head-neck direction, and the three first linear folding grooves 101 are arranged in parallel in a direction perpendicular to the head-neck direction. The second flexible sheath 2 is provided with three second linear folding grooves 201 penetrating the second flexible sheath 2 along the neck direction, and the three second linear folding grooves 201 are arranged in parallel in a direction perpendicular to the neck direction. In practical use, the flexible sheath can be easily bent at the position of the linear folding groove, and the flexible sheath at the position of the non-linear folding groove is basically kept stable and is not deformed. In this way, the flexible sheath can be bent and deformed substantially only at a set position (e.g., a portion where damage to the internal components is small during deformation), while remaining in a fixed shape (e.g., a portion where damage to the internal components is large during deformation).

As mentioned above, any two adjacent first coil units 4 are partially overlapped, and any two adjacent second coil units 5 are partially overlapped. However, the area of each first coil unit 4 or second coil unit 5 is not entirely overlapped by one or more coil units adjacent thereto. Referring to fig. 6, in the present embodiment, each first coil unit 4 has a first non-overlapping region 401 that is not overlapped with the other first coil units 4, and each second coil unit 5 has a second non-overlapping region 501 that is not overlapped with the other second coil units 5.

Referring to fig. 7 and 8, in a specific embodiment, each first linear folding groove 101 spans a corresponding first non-overlapping region 401 and a corresponding second non-overlapping region 501 in the head and neck direction, and each second linear folding groove 201 spans a corresponding first non-overlapping region 401 and a corresponding second non-overlapping region 501 in the head and neck direction. In a colloquial way, each first straight folding groove 101 is arranged at a corresponding one of the first non-overlapping areas 401 and one of the second non-overlapping areas 501, and each second straight folding groove 201 is arranged at a corresponding one of the first non-overlapping areas 401 and one of the second non-overlapping areas 501.

The inventor finds that, for two adjacent first coil units 4 (and two adjacent second coil units 5), if bending deformation occurs around the head and neck direction in the overlapping area of the two first coil units 4, not only a large bending resistance exists, but also the two first coil units 4 are easily caused to generate obvious deformation and relative displacement which are difficult to restore, and even the two first coil units 4 generate obvious friction and drag in the bending process. These aforementioned phenomena not only make it difficult for the coil unit to have a stable shape and position, thereby affecting the quality of a magnetic resonance image (e.g., stability of the image), but also shorten the life of the coil unit. In this regard, the inventors have considered that the straight folding grooves are not suitable for being provided in the overlapping regions of the adjacent coil units in the same group, and thus in the embodiment shown in fig. 7 and 8, the respective straight folding grooves are all arranged in the non-overlapping regions of the adjacent coils in the same group, thereby avoiding the aforementioned problem. Although a part of the straight folding groove is located in the overlapping area of the first coil unit 4 and the second coil unit 5 in fig. 7 and 8, the aforementioned problem is not highlighted because the first coil unit 4 and the second coil unit 5 are arranged in the head-neck direction and the folding is performed in a direction around the head-neck direction and the folding axis is located closer to the middle of the two coil units.

In another embodiment, the third coil unit 6 is not provided, and only the first coil group and the second coil group are provided in the head-neck direction.

In another embodiment, only two first linear folding grooves 101 are provided on the first flexible sheath 1, and only two second linear folding grooves 201 are provided on the second flexible sheath 2.

The above are exemplary embodiments of the present application only, and are not intended to limit the scope of the present application, which is defined by the appended claims.

Claims

1. A magnetic resonance coil apparatus for temporomandibular joint and cochlear imaging, comprising:

2. The magnetic resonance coil device according to claim 1, wherein the first flexible sheath is provided with a first connecting element on an outer side thereof, and the second flexible sheath is provided with a second connecting element on an outer side thereof;

3. The magnetic resonance coil apparatus according to claim 2, wherein the middle portion of the elastic clip arm is rotatably connected to a first portion of the bottom case around an axis line of the subject in a left-right direction, the first portion being on a side of the head recess away from the neck of the subject.

4. A magnetic resonance coil apparatus according to claim 3, wherein the middle portions of the resilient clip arms are only rotatable about the axis relative to the first portion.

5. The magnetic resonance coil device according to claim 3, wherein the bottom case includes a bottom case body and a projection projecting upward from the bottom case body, the projection having a curved surface that fits the crown of the subject on one side in the head-neck direction, the crown stopper having the first portion.

6. The magnetic resonance coil apparatus according to claim 3, wherein the bottom shell further has a recessed neck recess adapted to receive the neck of the subject, the neck recess and the first portion being respectively disposed on opposite sides of the head recess in the head-neck direction.

7. The magnetic resonance coil apparatus according to claim 6, wherein the plurality of coil units include a first coil group, a second coil group, and a third coil group arranged in this order along the head-neck direction from the head recess to the neck recess;

8. The magnetic resonance coil device according to claim 7, wherein the first coil units are provided in total in 7, the second coil units are provided in total in 8, the neck coils are provided in total in 1, and the first coil units, and the third coils are the same in size.

9. The magnetic resonance coil apparatus according to claim 7 or 8,

the first flexible sheath is provided with three first linear folding grooves which penetrate through the first flexible sheath along the head and neck direction and are arranged in parallel in the direction perpendicular to the head and neck direction, and the second flexible sheath is provided with three second linear folding grooves which penetrate through the second flexible sheath along the head and neck direction and are arranged in parallel in the direction perpendicular to the head and neck direction;

10. The magnetic resonance coil device according to claim 1, wherein the plurality of coil units include a first coil group and a second coil group that are arranged along the head-neck direction from the head recess to the neck recess;