Magnetic resonance coil, coil assembly and magnetic resonance equipment

Abstract

The invention relates to a magnetic resonance coil, a coil assembly and magnetic resonance equipment. The magnetic resonance coil is used for receiving a magnetic resonance signal of a to-be-detected object, and comprises a first coil group arranged in a first direction; a second coil group arranged in a second direction; the second coil group comprises at least two coils, and a first interval is formed between every two adjacent coils at the imaging center. By adopting the magnetic resonance coil, the imaging efficiency can be improved when the animal body is scanned and imaged.

Description

Technical Field

[0001] The present application relates to the field of magnetic resonance technology, and in particular to a magnetic resonance coil, a coil assembly and a magnetic resonance device. Background Art

[0002] Magnetic resonance imaging equipment has been gradually used in a variety of examinations on animals due to its advantages such as safe scanning and clear imaging.

[0003] Typically, a magnetic resonance device includes a coil. When using the magnetic resonance device to scan and image an animal, the coil is generally used to perform magnetic resonance scanning on the animal in various directions to obtain scanning signals, wherein the various directions include front-to-back, left-to-right, and head-to-feet directions. Finally, the signal obtained by the scanning is used to reconstruct an image to obtain a magnetic resonance image.

[0004] However, the imaging efficiency of the above technology is low when performing scanning imaging on an animal body. Summary of the invention

[0005] Based on this, it is necessary to provide a magnetic resonance coil, a coil assembly and a magnetic resonance device that can improve the imaging efficiency when scanning an animal body in order to solve the above technical problems.

[0006] In a first aspect, the present application provides a magnetic resonance coil for receiving a magnetic resonance signal of an object to be measured, wherein the magnetic resonance coil comprises:

[0007] A first coil group arranged in a first direction;

[0008] A second coil group is arranged in a second direction; the second coil group includes at least two coils, and a first interval is provided between each two adjacent coils at the imaging center.

[0009] In one embodiment, the first coil group and the second coil group are overlapped along a third direction, and the third direction is perpendicular to both the first direction and the second direction.

[0010] In one embodiment, the first coil group includes a first annular coil and a second annular coil, and the first annular coil and the second annular coil have a first overlapping area; the first overlapping area is symmetrically arranged along a symmetry axis, and the symmetry axis is parallel to the first direction.

[0011] In one embodiment, the first overlapping region includes at least four angles, and the at least four angles are all oblique angles.

[0012] In one embodiment, the second coil group includes a third annular coil and a fourth annular coil, and the third annular coil and the fourth annular coil are connected via electronic components;

[0013] The current flowing from the third annular coil to the fourth annular coil via the electronic components and the current flowing from the fourth annular coil to the third annular coil via the electronic components are opposite in direction and equal in magnitude.

[0014] In one embodiment, the electronic components at least include capacitors.

[0015] In one embodiment, the second coil group includes a third annular coil and a fourth annular coil, a second overlapping region is provided between the third annular coil and the fourth annular coil, and the second overlapping region is symmetrically arranged along a symmetry axis, and the symmetry axis is parallel to the first direction.

[0016] In one embodiment, the second overlapping region includes a second overlapping region 1 and a second overlapping region 2, the area of ​​the second overlapping region 1 is equal to the area of ​​the second overlapping region 2, and the second overlapping region 1 and the second overlapping region 2 are both far away from the imaging center.

[0017] In one embodiment, the first annular coil and the third annular coil form a third overlapping region, the first annular coil and the fourth annular coil form a fourth overlapping region, and the area of ​​the third overlapping region is equal to the area of ​​the fourth overlapping region.

[0018] In one embodiment, the second annular coil and the third annular coil form a fifth overlapping region, the second annular coil and the fourth annular coil form a sixth overlapping region, and the area of ​​the fifth overlapping region is equal to the area of ​​the sixth overlapping region.

[0019] In a second aspect, the present application further provides a coil assembly, comprising the magnetic resonance coil, a housing and a substrate according to the first aspect;

[0020] At least a portion of the magnetic resonance coil is printed on a substrate, the substrate is disposed on a housing, and the substrate is a flexible substrate.

[0021] In one embodiment, the shape of the shell includes any one of a cylindrical shape, a semi-cylindrical shape and a flat plate shape, and the substrate is fixed in the shell.

[0022] In a third aspect, the present application further provides a magnetic resonance device, comprising the coil assembly of the second aspect.

[0023] The magnetic resonance coil, coil assembly and magnetic resonance device described above, the magnetic resonance coil is used to receive the magnetic resonance signal of the object to be measured, the magnetic resonance coil includes a first coil group arranged in a first direction, a second coil group arranged in a second direction, the second coil group includes at least two coils, and there is a first interval between each two adjacent coils at the imaging center. Since the magnetic resonance coil has coil groups arranged in both directions, the number of coil groups arranged in this way is large, so the more magnetic resonance signals of the object to be measured are received, and the more received signals are, the faster the magnetic resonance imaging speed corresponding to them is, that is, the efficiency of magnetic resonance imaging can be improved; at the same time, since there is a certain interval between each two adjacent coils in the second direction at the imaging center, the decoupling between the coils in the second direction can be realized more simply, so that the magnetic resonance signal received by the magnetic resonance coil is more accurate, thereby improving the accuracy of magnetic resonance imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A possible structural example diagram of a magnetic resonance coil provided in an embodiment;

[0025] Figure 2 A diagram showing various possible structural examples of a first coil assembly provided in another embodiment;

[0026] Figure 3 A diagram showing various possible structural examples of a second coil assembly provided in another embodiment;

[0027] Figure 4 A structural example diagram of the connection between the third annular coil and the fourth annular coil provided in another embodiment;

[0028] Figure 5 is another possible structural example diagram of a magnetic resonance coil provided in another embodiment;

[0029] Figure 6 is another possible structural example diagram of a second coil assembly provided in another embodiment;

[0030] Figure 7 is another possible structural example diagram of a second coil assembly provided in another embodiment;

[0031] Figure 8 is another possible structural example diagram of a magnetic resonance coil provided in another embodiment;

[0032] Fig. 9 A simplified example diagram of another possible structure of a magnetic resonance coil provided in another embodiment;

[0033] Description of reference numerals:

[0034] First coil group: 10;

[0035] Second coil group: 20;

[0036] The first toroidal coil: 101;

[0037] Second toroidal coil: 102;

[0038] The third toroidal coil: 201;

[0039] Fourth toroidal coil: 202;

[0040] Electronic components: 203;

[0041] First overlap area: 100;

[0042] Second overlapping area: 200;

[0043] Second overlapping region 1: 2001;

[0044] Second overlapping region 2: 2002;

[0045] Third overlapping area: 300;

[0046] Fourth overlapping area: 400;

[0047] Fifth overlapping area: 500;

[0048] Sixth overlapping area: 600. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] At present, when performing magnetic resonance scanning on an object to be measured, the prior art mostly uses the magnetic resonance coil of the magnetic resonance device to scan the object to be measured in all directions, obtains the scanned magnetic resonance signals, and reconstructs the scanned magnetic resonance signals to obtain a reconstructed magnetic resonance image. However, this technology has a low imaging efficiency when scanning and imaging an animal body. Based on this, the embodiments of the present application provide a magnetic resonance coil, a coil assembly, and a magnetic resonance device, which can solve the above technical problems.

[0053] Figure 1 A possible structural example diagram of a magnetic resonance coil provided in an embodiment is shown in FIG. Figure 1 As shown, the magnetic resonance coil is used to receive magnetic resonance signals of an object to be measured, and the magnetic resonance coil includes: a first coil group 10 arranged in a first direction; a second coil group 20 arranged in a second direction; the second coil group 20 includes at least two coils, and there is a first interval between each two adjacent coils at the imaging center.

[0054] In this embodiment, the magnetic resonance coil is a receiving coil, which is mainly used to receive the magnetic resonance signal of the object to be measured during the magnetic resonance scanning of the object to be measured. The object to be measured is mainly an animal body, and of course the object to be measured can also be a human body. In an optional embodiment, the animal body can be a smaller animal body, such as an experimental mouse, an experimental rabbit, etc. Of course, the actual required animal body can also be selected according to the actual situation.

[0055] See also Figure 1 As shown, the first coil group 10 is arranged in the first direction X. The first coil group 10 may include one or more coils. If multiple coils are included, each adjacent two coils in the multiple coils may be arranged in an overlapping manner, or may be arranged in an interval but not overlapping manner, or other manners. When the first coil group 10 includes multiple coils, the decoupling method between the coils may be through overlapping decoupling or through other decoupling methods. In short, decoupling between the multiple coils can be achieved.

[0056] The type of coil in the first coil group 10 may be, for example, a ring coil, a planar coil, a surface coil, etc. When the first coil group 10 includes multiple coils, the types of the coils may be the same, partially the same and partially different, or all different.

[0057] The size or area of ​​the coils in the first coil group 10 can be set according to actual conditions. In the case where the first coil group 10 includes multiple coils, the sizes or areas of the coils can be equal or unequal.

[0058] Continue to see Figure 1 As shown, a second coil group 20 is arranged in the second direction Y, and the second coil includes at least two coils, for example, two, three, etc. The coils can be arranged in sequence along the second direction Y, and there is a certain interval between each two adjacent coils at the imaging center. In other words, each two adjacent coils do not overlap at the imaging center, and may or may not overlap in other areas or positions; in this way, by not overlapping the two adjacent coils at the imaging center, but decoupling in other areas or positions or other ways, decoupling between each two adjacent coils can be achieved relatively simply, so that the magnetic resonance signal received by the second coil group 20 is more accurate.

[0059] In addition, the intervals between every two adjacent coils in the second coil group 20 may be completely the same, partially the same and partially different, or completely different.

[0060] Further, for the above-mentioned first direction X and second direction Y, the first direction X and second direction Y may be two directions perpendicular to each other. For example, the first direction X may be the up-down HF direction, and the second direction Y may be the left-right RL direction. For example, for the first direction X, it may be set according to the actual magnetic resonance scanning scene. For example, when the subject to be measured is lying flat on the bed, the first direction X may be a direction parallel to the axial direction of the scanning cavity; for another example, when the subject to be measured is standing, the first direction X may be a direction parallel to the body of the subject to be measured. For the second direction Y, for example, when the subject to be measured is lying flat on the bed, the second direction Y may be a direction perpendicular to the axial direction of the scanning cavity and parallel to the subject to be measured; for another example, when the subject to be measured is standing, the second direction Y may be a direction from the left side to the right side of the subject to be measured and parallel to the body of the subject to be measured.

[0061] As for the arrangement between the first coil group 10 and the second coil group 20, the first coil group 10 and the second coil group 20 can be arranged in sequence in a certain direction, or other arrangements can be adopted. Of course, the first coil group 10 and the second coil group 20 can also be decoupled, and the decoupling method can be, for example, overlapping decoupling, specifically, decoupling can be performed by utilizing the overlapping area between the two coil groups. Of course, other methods can also be used for decoupling. In short, decoupling between the first coil group 10 and the second coil group 20 can be achieved, so that the accuracy of the magnetic resonance signal received by the entire magnetic resonance coil can be improved.

[0062] The magnetic resonance coil is used to receive the magnetic resonance signal of the object to be measured. The magnetic resonance coil includes a first coil group 10 arranged in a first direction and a second coil group 20 arranged in a second direction. The second coil group 20 includes at least two coils, and there is a first interval between each two adjacent coils at the imaging center. Since the magnetic resonance coil has coil groups arranged in both directions, the number of coil groups arranged in this way is large, so the more magnetic resonance signals of the object to be measured are received, and the more received signals are, the faster the magnetic resonance imaging speed corresponding to them is, that is, the efficiency of magnetic resonance imaging can be improved; at the same time, since there is a certain interval between each two adjacent coils in the second direction at the imaging center, the decoupling between the coils in the second direction can be realized relatively simply, so that the magnetic resonance signal received by the magnetic resonance coil is more accurate, thereby improving the accuracy of magnetic resonance imaging.

[0063] The above embodiment briefly mentions the arrangement of the first coil assembly 10 and the second coil assembly 20 . The following embodiment will describe in detail the specific arrangement of the first coil assembly 10 and the second coil assembly 20 .

[0064] Please continue to see Figure 1 The first coil group 10 and the second coil group 20 are overlapped along a third direction, and the third direction is perpendicular to both the first direction and the second direction.

[0065] Specifically, the first coil group 10 and the second coil group 20 can be arranged in an overlapping manner along the third direction Z, and the third direction Z can be, for example, the front-back AP direction, which is perpendicular to the first direction X and the second direction Y. For example, the third direction Z can be set according to the actual magnetic resonance scanning scene, for example, when the subject to be measured is lying flat on the bed, the third direction Z can be a direction perpendicular to the axis direction of the scanning cavity and perpendicular to the subject to be measured; for another example, when the subject to be measured is standing, the third direction Z can be a direction perpendicular to the body of the subject to be measured.

[0066] When the first coil group 10 and the second coil group 20 are overlapped in the third direction Z, the relative position between the two can be set according to actual conditions. For example, the first coil group 10 can be set at a position far away from the origin in the third direction Z, and the second coil group 20 can be set above the first coil group 10, that is, at a position close to the origin in the third direction Z. Of course, the two can also be set in reverse, which can be set according to actual conditions.

[0067] The overlap size between the first coil group 10 and the second coil group 20 can also be set according to the decoupling conditions between the first coil group 10 and the second coil group 20. In the overlap area between the first coil group 10 and the second coil group 20, the currents flowing into each other are just opposite, so the directions of the magnetic fields are also opposite, and thus they can cancel each other out, thereby achieving overlap decoupling between the first coil group 10 and the second coil group 20.

[0068] In this embodiment, the first coil group 10 and the second coil group 20 are overlapped along the third direction, and the third direction is perpendicular to both the first direction and the second direction. In this way, decoupling between the two coil groups can be easily achieved through overlapping, thereby ensuring the accuracy of the magnetic resonance signal finally received by the magnetic resonance coil.

[0069] In the above embodiment, several types of coils in the first coil group 10 are mentioned. In the following embodiment, one type is specifically described assuming that the first coil group 10 includes two coils.

[0070] Figure 2 FIG. 1 is a diagram showing various possible structural examples of the first coil assembly 10 provided in another embodiment, see Figure 2 As shown, the first coil group 10 includes a first annular coil 101 and a second annular coil 102, and the first annular coil 101 and the second annular coil 102 have a first overlapping area 100; the first overlapping area 100 is symmetrically arranged along a symmetry axis, and the symmetry axis is parallel to the first direction.

[0071] See also Figure 2 As shown, two annular coils are arranged adjacent to each other along a first direction X, and are respectively recorded as a first annular coil 101 and a second annular coil 102, wherein the first annular coil 101 and the second annular coil 102 have the same shape and size, and the same area. The first annular coil 101 and the second annular coil 102 may be arranged overlappingly along the first direction on the substrate where the magnetic resonance coil is located. Figure 2The various shapes of the first annular coil 101 and the shapes of the second annular coil 102 shown in the figure are only examples, and can be designed as other annular shapes according to actual conditions, for example, both are designed as circular ring shapes, etc. In addition, the first annular coil 101 and the second annular coil 102 can be arranged on the same plane, and the two can be overlapped, and the overlap between the two can be recorded as the first overlapping area 100. The size of the first overlapping area 100 is related to the decoupling size between the first annular coil 101 and the second annular coil 102; decoupling refers to the removal of electromagnetic interference between coils. In the first overlapping area 100, the magnetic field direction of the first annular coil 101 entering the second annular coil 102 and the magnetic field direction of the second annular coil 102 entering the first annular coil 101 are opposite, so that the magnetic fields generated by the first annular coil 101 and the second annular coil 102 in the first overlapping area 100 can just offset each other, thereby achieving decoupling between the first annular coil 101 and the second annular coil 102.

[0072] In addition, the above-mentioned first overlapping area 100 is the overlapping area of ​​the first annular coil 101 and the second annular coil 102. The first overlapping area 100 is symmetrical along a symmetry axis parallel to the first direction X, so that the first overlapping area 100 is evenly distributed on both sides of the symmetry axis along the symmetry axis, thereby achieving decoupling between the coils on both sides of the symmetry axis.

[0073] Furthermore, since the signal-to-noise ratio of the imaging center area or the field of view center (FOV center) area is generally lower than the signal-to-noise ratio of other non-imaging center areas or non-field of view center areas during the current magnetic resonance imaging process using a magnetic resonance coil, in order to improve the signal-to-noise ratio of the imaging center area or the field of view center area, as an optional embodiment, the first overlapping area 100 may include at least four angles, and all of the at least four angles are oblique angles.

[0074] Here you can continue to see Figure 2 The first coil group 10 shown, wherein the first annular coil 101 and the second annular coil 102 have a first overlapping area 100, the first overlapping area 100 is a quadrilateral, the quadrilateral includes four internal angles, the four internal angles are all oblique angles, that is, all are right angles other than 90 degrees, such an arrangement can ensure that the magnetic field direction of the first annular coil 101 entering the second annular coil 102 and the magnetic field direction of the second annular coil 102 entering the first annular coil 101 are not perpendicular to the four sides of the first overlapping area 100, thereby reducing the noise in the imaging center area or the visual field center area, and improving the signal-to-noise ratio of the imaging center area or the visual field center area.

[0075] In this embodiment, the first coil group 10 includes a first annular coil 101 and a second annular coil 102 with a first overlapping region 100 therebetween, and the first overlapping region 100 is symmetrically arranged along a symmetry axis and the symmetry axis is parallel to the first direction, so that decoupling between the two annular coils can be simply achieved through the first overlapping region 100, and decoupling between the coils on both sides of the symmetry axis can be achieved through a symmetrical arrangement, thereby ensuring the decoupling effect of the entire first coil group 10.

[0076] In the above embodiment, several types of coils in the second coil group 20 are mentioned. In the following embodiment, the second coil group 20 includes two coils, and one type is specifically described.

[0077] Figure 3 FIG. 2 is a diagram showing various possible structural examples of the second coil assembly 20 provided in another embodiment. Figure 3 As shown, the second coil group 20 includes a third annular coil 201 and a fourth annular coil 202, and the third annular coil 201 and the fourth annular coil 202 are connected via an electronic component 203; the current flowing from the third annular coil 201 to the fourth annular coil 202 via the electronic component 203 and the current flowing from the fourth annular coil 202 to the third annular coil 201 via the electronic component 203 are opposite in direction and equal in magnitude.

[0078] See also Figure 3 As shown, two annular coils in the second coil group 20 are adjacently arranged along the second direction Y, and are respectively recorded as the third annular coil 201 and the fourth annular coil 202, wherein the third annular coil 201 and the fourth annular coil 202 have the same shape and size, and the same area. The shape of the third annular coil 201 and the shape of the fourth annular coil 202 are generally the same, for example, they can be set to Figure 3 The rectangle, annular shape (such as circle or ellipse), irregular shape, etc. shown can of course be set to other shapes.

[0079] In addition, the third annular coil 201 and the fourth annular coil 202 may be arranged on the same plane, and the two may be connected via an electronic component 203. As an optional embodiment, the electronic component 203 at least includes a capacitor, and of course may also include other electronic components 203. The third annular coil 201 and the fourth annular coil 202 may be connected via an electronic component 203, or may be connected via a plurality of electronic components 203.

[0080] For example, the third toroidal coil 201 and the fourth toroidal coil 202 are both circular toroidal coils, and the third toroidal coil 201 and the fourth toroidal coil 202 are connected via two electronic components 203. Figure 4 The structural example diagram of the connection between the third toroidal coil 201 and the fourth toroidal coil 202 shown in FIG. Figure 5 As shown in another possible structural example of the magnetic resonance coil, the third annular coil 201 and the fourth annular coil 202 may be connected on both sides away from the imaging center through an electronic component 203 (such as a capacitor shown in the figure).

[0081] After the third annular coil 201 and the fourth annular coil 202 are connected via the electronic component 203, for each of the third annular coil 201 and the fourth annular coil 202 connected by the electronic component 203, the current flowing from the third annular coil 201 to the fourth annular coil 202 via the electronic component 203 and the current flowing from the fourth annular coil 202 to the third annular coil 201 via the electronic component 203 are in opposite directions and are equal in magnitude, so that the two currents can be offset by the Hough's law of current, that is, the magnetic fields generated by the two currents can also offset each other, thereby achieving decoupling between the third annular coil 201 and the fourth annular coil 202.

[0082] In this embodiment, the second coil group 20 includes a third annular coil 201 and a fourth annular coil 202, and the two annular coils are connected by an electronic component 203, and the currents flowing to each other through the electronic component 203 are opposite in direction and equal in magnitude. In this way, through the connection of the electronic component 203, the decoupling between the two annular coils can be realized more simply, reducing the cost of decoupling; at the same time, this can also make the two annular coils retain a gap at the imaging center, so that the magnetic resonance signals at the imaging center and the edge are better analyzed, thereby further improving the efficiency of magnetic resonance imaging. In addition, the electronic component 203 connecting the third annular coil 201 and the fourth annular coil 202 includes at least a capacitor, so that the capacitor can simplify the difficulty of decoupling the two annular coils on the one hand, and on the other hand, it can also reduce the cost of decoupling.

[0083] The above embodiment describes how the two coils in the second coil group 20 can be decoupled by the connected electronic components 203 . The following embodiment describes how the two coils in the second coil group 20 can be decoupled by overlapping.

[0084] Figure 6 FIG. 2 is another possible structural example diagram of the second coil assembly 20 provided in another embodiment, see Figure 6As shown, the second coil group 20 includes a third annular coil 201 and a fourth annular coil 202, and a second overlapping area 200 is provided between the third annular coil 201 and the fourth annular coil 202, and the second overlapping area 200 is symmetrically arranged along a symmetry axis, and the symmetry axis is parallel to the first direction.

[0085] See also Figure 6 As shown, two annular coils in the second coil group 20 are arranged adjacently along the second direction Y, and are respectively recorded as the third annular coil 201 and the fourth annular coil 202, wherein the third annular coil 201 and the fourth annular coil 202 have the same shape and size, and the same area. In addition, the third annular coil 201 and the fourth annular coil 202 can be arranged on the same plane, and the two can be overlapped, and the overlap between the two can be recorded as the second overlapping area 200. The size of the second overlapping area 200 is related to the decoupling size between the third annular coil 201 and the fourth annular coil 202; in the second overlapping area 200, the magnetic field direction of the third annular coil 201 entering the fourth annular coil 202 and the magnetic field direction of the fourth annular coil 202 entering the third annular coil 201 are opposite, so that the magnetic fields generated by the third annular coil 201 and the fourth annular coil 202 in the second overlapping area 200 can be offset, thereby achieving decoupling between the third annular coil 201 and the fourth annular coil 202.

[0086] In addition, the above-mentioned second overlapping area 200 is the overlapping area of ​​the third annular coil 201 and the fourth annular coil 202. The second overlapping area 200 is symmetrical along a symmetry axis parallel to the first direction X, so that the second overlapping area 200 is evenly distributed on both sides of the symmetry axis along the symmetry axis, thereby achieving decoupling between the coils on both sides of the symmetry axis.

[0087] Further, in order to avoid affecting the signal-to-noise ratio of the imaging center, two overlapping regions may be provided for the third annular coil 201 and the fourth annular coil 202. That is, as an optional embodiment, see Figure 7 Another possible structural example diagram of the second coil group 20 is shown, the above-mentioned second overlapping area 200 includes a second overlapping area 1 2001 and a second overlapping area 2 2002, the area of ​​the second overlapping area 1 2001 is equal to the area of ​​the second overlapping area 2002, and the above-mentioned second overlapping area 1 2001 and the second overlapping area 2 2002 are both far away from the imaging center, that is, the second overlapping area 1 2001 and the second overlapping area 2 2002 are respectively arranged between two annular coils far away from the imaging center, so that the signal-to-noise ratio of the imaging center can be guaranteed.

[0088] In this embodiment, the second coil group 20 includes a third annular coil 201 and a fourth annular coil 202 with a second overlapping region 200 therebetween, and the second overlapping region 200 is symmetrically arranged along the symmetry axis and the symmetry axis is parallel to the first direction, so that the decoupling between the two annular coils can be simply achieved through the second overlapping region 200, and the decoupling between the coils on both sides of the symmetry axis can be achieved through the symmetrical arrangement, thereby ensuring the decoupling effect of the entire second coil group 20. Further, the second overlapping region 200 includes two overlapping regions of equal area and far away from the imaging center, so that the decoupling between the third annular coil 201 and the fourth annular coil 202 can be achieved more accurately, the accuracy of the received signal between the third annular coil 201 and the fourth annular coil 202 can be improved, and the signal-to-noise ratio of the imaging center can be improved, thereby improving the accuracy of magnetic resonance imaging.

[0089] In the above embodiment, it is mentioned that the first coil group 10 and the second coil group 20 also need to be decoupled. The following embodiment describes how to implement decoupling between the first coil group 10 and the second coil group 20 when the first coil group 10 includes two annular coils and the second coil group 20 includes two annular coils.

[0090] Figure 8 In another embodiment, based on the above Figure 6 and Figure 7 Another possible structural example diagram of the magnetic resonance coil provided by the second coil assembly 20 is shown in FIG. Fig. 9 FIG. 1 is a simplified example diagram of another possible structure of a magnetic resonance coil provided in another embodiment. Figure 8 and Fig. 9 As shown, the first annular coil 101 and the third annular coil 201 form a third overlapping region 300 , the first annular coil 101 and the fourth annular coil 202 form a fourth overlapping region 400 , and the area of ​​the third overlapping region 300 is equal to the area of ​​the fourth overlapping region 400 .

[0091] Among them, a third overlapping area 300 is formed between the first annular coil 101 and the third annular coil 201, and a fourth overlapping area 400 is formed between the first annular coil 101 and the fourth annular coil 202. The areas of the third overlapping area 300 and the fourth overlapping area 400 are equal, so that the magnetic fields of the overlapping parts between the first annular coil 101 and the third annular coil 201 and the fourth annular coil 202 are equal in magnitude, and the magnetic fields between the two annular coils are in opposite directions. In this way, the magnetic fields of the two overlapping areas (i.e., the third overlapping area 300 and the fourth overlapping area 400) are opposite and can offset each other, thereby achieving decoupling between the first annular coil 101 and the third annular coil 201 and the fourth annular coil 202.

[0092] In addition, for the second annular coil 102 , the second annular coil 102 and the third annular coil 201 form a fifth overlapping region 500 , and the second annular coil 102 and the fourth annular coil 202 form a sixth overlapping region 600 , and the area of ​​the fifth overlapping region 500 is equal to the area of ​​the sixth overlapping region 600 .

[0093] Among them, a fifth overlapping area 500 is formed between the second annular coil 102 and the third annular coil 201, and a sixth overlapping area 600 is formed between the second annular coil 102 and the fourth annular coil 202. The areas of the fifth overlapping area 500 and the sixth overlapping area 600 are equal, so that the magnetic fields of the overlapping parts between the second annular coil 102 and the third annular coil 201 and the fourth annular coil 202 are equal in magnitude, and the magnetic fields between the two annular coils are in opposite directions. In this way, the magnetic fields of the two overlapping areas (i.e., the fifth overlapping area 500 and the sixth overlapping area 600) are opposite and can offset each other, thereby achieving decoupling between the second annular coil 102 and the third annular coil 201 and the fourth annular coil 202.

[0094] In this embodiment, the overlapping areas of the first loop coil 101, the third loop coil 201 and the fourth loop coil 202 are equal in area, so that the decoupling between the first loop coil 101 and the third loop coil 201 and the fourth loop coil 202 can be achieved more accurately, and the accuracy of receiving signals between the first loop coil 101 and the third loop coil 201 and the fourth loop coil 202 is improved. At the same time, the overlapping areas of the second loop coil 102, the third loop coil 201 and the fourth loop coil 202 are equal in area, so that the decoupling between the second loop coil 102 and the third loop coil 201 and the fourth loop coil 202 can be achieved more accurately, and the accuracy of receiving signals between the second loop coil 102 and the third loop coil 201 and the fourth loop coil 202 is improved.

[0095] Based on the same inventive concept, the present application also provides a coil assembly, including the above Figure 1-9 A magnetic resonance coil, a shell and a substrate; at least a part of the magnetic resonance coil is printed on the substrate, the substrate is arranged on the shell, and the substrate is a flexible substrate.

[0096] As an optional embodiment, the shape of the shell includes any one of a cylindrical shape, a semi-cylindrical shape and a flat plate shape, and the substrate is fixed in the shell.

[0097] The shell and the object to be measured can be fixed on the bed. When the object to be measured is scanned using the magnetic resonance coil in the shell, the shell can be covered on the part to be measured of the object to be measured by adjusting the relative position between the shell and the object to be measured.

[0098] The object to be tested here can be an animal body, and the part to be tested can be the head, chest, etc. of the animal body. In some embodiments, the animal body can be an experimental mouse. The first annular coil 101, the second annular coil 102, the third annular coil 201, and the fourth annular coil 202 in the magnetic resonance coil can be printed in whole or in part on a flexible substrate, and the flexible substrate is arranged inside the shell by gluing or the like to obtain a coil assembly for scanning the object to be tested.

[0099] Here, by setting shells of different shapes, it is possible to adapt to different scanning scene requirements. By replacing different coil assemblies, the magnetic resonance coil set inside the shell can be fixed to the part to be measured of the object to be measured through the shell during subsequent scanning, thereby avoiding the problem of affecting signal reception due to the movement of the part to be measured by the object to be measured, thereby improving the accuracy and effectiveness of the received signal and ensuring the accuracy of subsequent imaging.

[0100] In this embodiment, since the coil assembly includes a magnetic resonance coil, the magnetic resonance coil is used to receive the magnetic resonance signal of the object to be measured, and the magnetic resonance coil includes a first coil group 10 arranged in a first direction, and a second coil group 20 arranged in a second direction, the second coil group 20 includes at least two coils, and there is a first interval between each two adjacent coils at the imaging center. Since the magnetic resonance coil has coil groups arranged in both directions, the number of coil groups arranged in this way is large, so the more magnetic resonance signals of the object to be measured are received, and the more received signals are, the faster the magnetic resonance imaging speed corresponding to it is, that is, the efficiency of magnetic resonance imaging can be improved; at the same time, since there is a certain interval between each two adjacent coils in the second direction at the imaging center, it is relatively simple to achieve decoupling between the coils in the second direction, so that the magnetic resonance signal received by the magnetic resonance coil is more accurate, thereby improving the accuracy of magnetic resonance imaging.

[0101] Based on the same inventive concept, the embodiment of the present application further provides a magnetic resonance device, including the above coil assembly. Of course, the magnetic resonance device may also include other components.

[0102] In this embodiment, since the magnetic resonance device includes a coil assembly, and the coil assembly includes a magnetic resonance coil, the magnetic resonance coil is used to receive the magnetic resonance signal of the object to be measured, and the magnetic resonance coil includes a first coil group 10 arranged in a first direction, and a second coil group 20 arranged in a second direction, the second coil group 20 includes at least two coils, and there is a first interval between each two adjacent coils at the imaging center. Since the magnetic resonance coil has coil groups arranged in both directions, the number of coil groups arranged in this way is large, so the more magnetic resonance signals of the object to be measured are received, and the more received signals are, the faster the magnetic resonance imaging speed corresponding to it is, that is, the efficiency of magnetic resonance imaging can be improved; at the same time, since there is a certain interval between each two adjacent coils in the second direction at the imaging center, it is relatively simple to achieve decoupling between the coils in the second direction, so that the magnetic resonance signal received by the magnetic resonance coil is more accurate, thereby improving the accuracy of magnetic resonance imaging.

[0103] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A magnetic resonance coil for receiving a magnetic resonance signal of an object to be measured, characterized in that: The magnetic resonance coil comprises: A first coil group arranged in a first direction; A second coil group is arranged in a second direction; the second coil group includes at least two coils, and a first interval is provided between each two adjacent coils at an imaging center.

2. The magnetic resonance coil according to claim 1, characterized in that The first coil group and the second coil group are overlapped along a third direction, and the third direction is perpendicular to both the first direction and the second direction.

3. The magnetic resonance coil according to claim 1, characterized in that: The first coil group includes a first annular coil and a second annular coil, wherein the first annular coil and the second annular coil have a first overlapping region; the first overlapping region is symmetrically arranged along a symmetry axis, and the symmetry axis is parallel to the first direction.

4. The magnetic resonance coil according to claim 3, characterized in that: The first overlapping area includes at least four angles, and the at least four angles are all oblique angles.

5. The magnetic resonance coil according to claim 3, characterized in that: The second coil group includes a third annular coil and a fourth annular coil, and the third annular coil and the fourth annular coil are connected via electronic components; The current flowing from the third toroidal coil to the fourth toroidal coil via the electronic components and the current flowing from the fourth toroidal coil to the third toroidal coil via the electronic components are opposite in direction and equal in magnitude.

6. The magnetic resonance coil according to claim 5, characterized in that: The electronic components at least include capacitors.

7. The magnetic resonance coil according to claim 3, characterized in that: The second coil group includes a third annular coil and a fourth annular coil, a second overlapping region is defined between the third annular coil and the fourth annular coil, and the second overlapping region is symmetrically arranged along a symmetry axis, and the symmetry axis is parallel to the first direction.

8. The magnetic resonance coil according to claim 7, characterized in that: The second overlapping region includes a second overlapping region 1 and a second overlapping region 2, the area of ​​the second overlapping region 1 is equal to the area of ​​the second overlapping region 2, and the second overlapping region 1 and the second overlapping region 2 are both far away from the imaging center.

9. The magnetic resonance coil according to claim 5 or 7, characterized in that: The first annular coil and the third annular coil form a third overlapping region, the first annular coil and the fourth annular coil form a fourth overlapping region, and an area of ​​the third overlapping region is equal to an area of ​​the fourth overlapping region.

10. The magnetic resonance coil according to claim 5 or 7, characterized in that: The second loop coil and the third loop coil form a fifth overlapping region, the second loop coil and the fourth loop coil form a sixth overlapping region, and an area of ​​the fifth overlapping region is equal to an area of ​​the sixth overlapping region.

11. A coil assembly, characterized in that: A magnetic resonance coil, a shell and a substrate comprising any one of claims 1 to 10; At least a portion of the magnetic resonance coil is printed on the substrate, the substrate is disposed on the housing, and the substrate is a flexible substrate.

12. The coil assembly according to claim 11, characterized in that: The shell has a shape of any one of a cylindrical shape, a semi-cylindrical shape and a flat plate shape, and the substrate is fixed in the shell.

13. A magnetic resonance device, characterized in that: The coil assembly comprises the coil assembly described in any one of claims 11-12.

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