Magnetic resonance coil assembly

Abstract

The utility model relates to a magnetic resonance coil assembly. The magnetic resonance coil assembly comprises a sleeve body which is enclosed to form a first space; the first coil group is arranged on the sleeve body; the second coil assembly is arranged on the sleeve body, and the second coil assembly and the first coil assembly are located on the two sides of the first space and surround the first space; the belt body is connected to one end of the sleeve body in the extending direction of the first space, and the unfolded shape of the belt body is bent back to the first space; the belt body comprises a first ring section and a second ring section, the second ring section is a flexible section, the second ring section and the first ring section can define a second space communicating with the first space, and the second ring section can be unfolded; and the third coil group is arranged on the belt body and can surround the second space. The magnetic resonance coil assembly can well detect a complex structure and can adapt to detected objects of different sizes.

Description

Technical Field

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

[0002] Magnetic resonance testing is a method of detecting the internal state of the object being tested by forming an image through magnetic resonance signals. Magnetic resonance testing is increasingly widely used in medical examinations. In order to achieve magnetic resonance testing, a coil is often used. The coil should be close to the object being tested when in use. Common coils include ultra-flexible coils and hard shell coils.

[0003] Universal superflexible coils are small-sized, low-channel coils that wrap around or against the object being measured, such as a patient's limbs. Universal superflexible coils have a large coverage / imaging range and are more adaptable to the size and posture of the limbs. However, the imaging effect of universal superflexible coils is poor, especially when the wrapping overlaps too much or is folded in half, resulting in overlapping coil units.

[0004] For some limbs, such as the wrist, a dedicated hard shell structure coil can be designed. A common structure is the sleeve type. When in use, the patient inserts his hand from the opening on one side, and the hard shell can be fixed on the bracket for scanning. The sleeve structure has the advantage of simple and easy-to-use workflow, but because the structure size is fixed, large-sized palms are not easy to insert, and small-sized palms are far away from the coil unit. In addition, the fixed hard shell is not friendly to patients with diseases and swelling in the hands. Another common structure is the opening and closing type, which is usually an opening and closing structure of the upper and lower hard shells in the positive and negative directions of the palm. Compared with the sleeve type, the adaptability to different palms is slightly improved. However, due to the two-piece structure, the side units are discontinuous or lack coverage.

[0005] When it comes to complex-shaped limbs such as the palm and wrist, the common hard-shell magnetic resonance coil is difficult to use flexibly. Utility Model Content

[0006] Based on this, it is necessary to provide a magnetic resonance coil assembly to address the problem that it is difficult to perform magnetic resonance detection on the palm-wrist structure.

[0007] The present disclosure provides a magnetic resonance coil assembly, which includes: a sleeve, which is arranged to form a first space; a first coil group, which is arranged on the sleeve; a second coil group, which is arranged on the sleeve, and the second coil group and the first coil group surround the first space; a belt body, which is connected to one end of the sleeve body along the extension direction of the first space, and the unfolded shape of the belt body is bent away from the first space; the belt body includes a first ring segment and a second ring segment, the second ring segment is a flexible segment, and the second ring segment can be arranged with the first ring segment to form a second space connected to the first space and can be unfolded; and a third coil group, which is arranged on the belt body and can surround the second space.

[0008] The magnetic resonance coil assembly of the disclosed embodiment can use the sleeve to wrap a part of the object to be measured, such as the palm, and use the flexible section of the belt to surround another part of the object to be measured, such as the wrist. The sleeve and the belt can achieve good adhesion to the measured parts of different shapes; furthermore, the palm can be detected by the first coil group and the second coil group, and the wrist can be detected by the third coil group. The magnetic resonance coil assembly can achieve good detection of complex palm-wrist structures and can adapt to objects of different sizes. The magnetic resonance coil assembly is easy and quick to use.

[0009] In some embodiments, the belt body further includes a third ring segment, the third ring segment is a flexible segment, and the first ring segment is connected between the second ring segment and the third ring segment.

[0010] In this way, the belt body is used by using the cooperation of the second ring segment and the third ring segment, and the second ring segment and the third ring segment each have a small operation range, so the belt body can be easily wound around the object to be tested. When using the magnetic resonance coil assembly, it is possible to avoid turning over the object to be tested.

[0011] In some embodiments, the sleeve includes a first sheet and a second sheet, which can be combined and opened, and the first sheet and the second sheet in the combined state are used to enclose and form a first space; the first coil group is arranged on the first sheet, and the second coil group is arranged on the second sheet.

[0012] Such an arrangement can ensure the use function of the sleeve and facilitate the placement of the object to be measured into the magnetic resonance coil assembly.

[0013] In some embodiments, the third coil group partially overlaps with the first coil group, and the third coil group partially overlaps with the second coil group; and the coils in the first coil group and the coils in the second coil group are interlaced in projection.

[0014] Such an arrangement helps to improve image quality and ensure the use effect of the magnetic resonance coil assembly.

[0015] In some embodiments, the first coil group, the second coil group, and the third coil group respectively include three rows of coils arranged and overlapped along the extension direction, and two adjacent coils in each row of coils overlap.

[0016] With such configuration, the magnetic resonance coil assembly can achieve a sufficient number of channels and channel density to ensure image quality.

[0017] Exemplarily, in the coils of the first coil group and the second coil group, two adjacent rows of coils are aligned; and in the third coil group, two adjacent rows of coils are staggered.

[0018] Such an arrangement can ensure that the first coil group and the second coil group completely cover the first space; and can also ensure that the third coil group flexibly and effectively surrounds the second space.

[0019] In some embodiments, each coil of the first coil group, the second coil group, and the third coil group is a double-layer structure coil, which includes an inner ring and an outer ring, and the two ends of the inner ring at the inner ring opening are alternately connected with the two ends of the outer ring at the outer ring opening to achieve electrical connection.

[0020] With such a configuration, the magnetic resonance coil assembly supports high-power acceleration; when the magnetic resonance coil assembly is used, the scanning time can be reduced without sacrificing image quality.

[0021] In some embodiments, the belt body is detachably connected to the sleeve body.

[0022] With this arrangement, the magnetic resonance coil assembly can be flexibly worn and adjusted.

[0023] In some embodiments, the magnetic resonance coil assembly further includes a bracket, and the sleeve and the first ring segment are connected to the bracket.

[0024] Such an arrangement can stably and reliably support the object to be measured and is easier to position. In addition, the magnetic resonance coil assembly can be operated in a relatively standardized manner, which is conducive to ensuring the accuracy of the wearing action.

[0025] In some embodiments, at least one of the first coil assembly, the second coil assembly, and the third coil assembly is connected to a circuit element, and the circuit element is located in the bracket.

[0026] Such an arrangement can help reduce the effect of heat generated by circuit elements during operation on the temperature of the sleeve or the belt; in addition, it is helpful to reduce the size of the coil and achieve the effects of a high number of channels and a high channel density.

[0027] The disclosed embodiments also provide a magnetic resonance coil assembly suitable for limb scanning or ankle scanning, characterized in that it includes: a flexible carrier, including a combination of one or more of fabric, fur or memory foam materials, the flexible carrier being an integrated structure or a multi-piece structure; a first coil group, arranged in a rear area of ​​the flexible carrier; a second coil group, arranged in a front area of ​​the flexible carrier, and the second coil group is arranged opposite to the first coil group, and the first coil group and the second coil group surround to form a first space for accommodating a detection object; a third coil group, arranged in the rear area of ​​the flexible carrier, and the third coil group can be folded around the second space.

[0028] The magnetic resonance coil assembly of the disclosed embodiment can perform fit detection on parts with complex structures such as limbs or ankles, and can adapt to objects of different sizes, provide good comfort for the person being detected, and improve the patient experience.

[0029] In some embodiments, the magnetic resonance coil assembly further comprises a support block, the flexible carrier is disposed on the support block; at least one of the first coil group, the second coil group and the third coil group is connected to a circuit element, and the circuit element is located in the support block.

[0030] Such a setting is conducive to keeping the limbs in a more comfortable posture during detection; it helps to reduce the impact of heat generated by circuit elements during operation on the temperature of the flexible carrier; in addition, it is conducive to reducing the size of the coil and achieving the effect of a high number of channels and a high channel density. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural schematic diagram of a magnetic resonance coil assembly in an expanded state according to an embodiment of the present disclosure;

[0032] Figure 2 It is a schematic diagram of the structure of the magnetic resonance coil assembly during use according to an embodiment of the present disclosure;

[0033] Figure 3 It is a schematic diagram of the structure of the magnetic resonance coil assembly during use according to an embodiment of the present disclosure;

[0034] Figure 4 It is a structural schematic diagram of the magnetic resonance coil assembly in a wrapped state according to an embodiment of the present disclosure;

[0035] Figure 5 is a schematic structural diagram of a magnetic resonance coil assembly according to an embodiment of the present disclosure;

[0036] Figure 6 is a schematic structural diagram of a magnetic resonance coil assembly according to an embodiment of the present disclosure;

[0037] Figure 7 It is a schematic diagram of the structure of the coil in the embodiment of the present disclosure;

[0038] Figure 8 It is a schematic diagram of the structure of the coil in the embodiment of the present disclosure;

[0039] Fig. 9 is a signal-to-noise ratio curve diagram of various coils in the embodiments of the present disclosure;

[0040] Fig.10 This is the acceleration model diagram of the single-layer coil;

[0041] Fig.11 This is the acceleration model diagram of the double-layer structure coil;

[0042] Fig.12 This is the acceleration effect diagram of the single-layer coil;

[0043] Fig.13 This is the acceleration effect diagram of the double-layer structure coil;

[0044] Fig.14 is a schematic structural diagram of a magnetic resonance coil assembly according to an embodiment of the present disclosure;

[0045] Fig.15 is a schematic structural diagram of a magnetic resonance coil assembly according to an embodiment of the present disclosure;

[0046] Fig.16 is a schematic structural diagram of a magnetic resonance coil assembly according to an embodiment of the present disclosure;

[0047] Fig.17 This is a structural schematic diagram of a magnetic resonance coil assembly according to an embodiment of the present disclosure installed on a bed;

[0048] Fig.18 It is a structural block diagram of a magnetic resonance detection system according to an embodiment of the present disclosure.

[0049] Description of reference numerals: 1, sleeve; 101, first space; 11, first sheet; 12, second sheet; 2, belt; 201, second space; 21, first ring segment; 22, second ring segment; 23, third ring segment;

[0050] 3. Coil group; 30. Coil; 301. Inner coil; 3011. First wire end; 3012. Second wire end; 302. Outer coil; 3021. Third wire end; 3022. Fourth wire end; 303. First connecting section; 304. Second connecting section; 31. First coil group; 32. Second coil group; 33. Third coil group; 4. Support block;

[0051] 100. Magnetic resonance coil assembly; 200. Bed; 300. Signal processor; 400. Magnetic resonance detection system. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present disclosure more obvious and understandable, the specific implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present disclosure. However, the embodiments of the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the embodiments of the present disclosure, so the embodiments of the present disclosure are not limited by the specific examples of the embodiments disclosed below.

[0053] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.

[0054] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. Exemplarily, the second ring segment may also be referred to as the third ring segment, and the third ring segment may also be referred to as the second ring segment. In the description of the embodiments of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a flexible connection, or a rigid connection along at least one direction; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or directly connected with the presence of an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. The terms "installed", "set", "fixed", etc. can be broadly understood as connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0057] As used herein, the terms "layer" and "region" refer to a portion of a material including an area having a certain thickness. A layer can extend horizontally, vertically and / or along a tapered surface. A layer can be an area of ​​a uniform or non-uniform continuous structure, and its thickness perpendicular to the extension direction may not be greater than the thickness of the continuous structure. A layer can include multiple layers. The shapes of various areas and layers in the drawings and their relative sizes and positional relationships are only exemplary, and may actually deviate due to manufacturing tolerances or technical limitations, and the design can be adjusted according to actual needs.

[0058] See also Figure 1 , Figure 1 The magnetic resonance coil assembly of the embodiment of the present disclosure is shown. The magnetic resonance coil assembly 100 provided in the embodiment of the present disclosure includes a sleeve 1, a belt 2 and a coil group 3. The sleeve 1 can be provided with at least two coil groups 3, and the whole can also be called a palm sleeve. The belt 2 can be provided with at least one coil group 3, and the whole can be called a wristband.

[0059] Combination Figure 2 , Figure 3 , Figure 4 and Fig.16 As shown, the sleeve 1 can be surrounded to form a first space 101. When the object to be measured is a palm or wrist, the first space 101 can be used to accommodate the palm. The palm accommodated in the first space 101 includes fingers. The first space 101 has an opening at one end along the Y-axis direction, and the first space 101 can extend along the Y-axis direction. The sleeve 1 can be surrounded in the XZ plane, and this surrounding can be a semi-enclosed surrounding, for example, the projection along the Z-axis direction covers the first space 101.

[0060] The belt body 2 is connected to one end of the sleeve body 1 along the extension direction of the first space 101. The belt body 2 can be as follows Figure 1 or Fig.16 As shown, it can also be expanded as Figure 4 The belt body 2 can be curled around to define the second space 201. The magnetic resonance coil assembly 100 as a whole has an unfolded state and a wrapped state. The second space 201 is connected to the first space 101 along the Y-axis direction. The wrist of the subject can be worn in the second space 201. The second space 201 and the first space 101 have projections of different shapes along the Y-axis direction.

[0061] refer to Figure 1 The unfolded shape of the belt body 2 is bent in the XY plane, and the bending direction is away from the sleeve body 1 and also away from the first space 101. Figure 4After the belt body 2 is curled in the XZ plane, due to its curved unfolded shape, it will curl into a cone shape, and the height of the cone shape is along the Y axis direction. The wrist is usually narrower and thicker than the palm; at the same time, the part of the wrist away from the palm is thinner than the part close to the palm. The belt body 2 with a curved profile can fit the wrist well when curled, and ensure that the palm is in the first space 101 of the sleeve body 1.

[0062] The belt body 2 includes a first ring segment 21 and a second ring segment 22. Fig.16 , the second ring segment 22 is a flexible segment. The second ring segment 22 can be bent and curled without being damaged. Exemplarily, the first ring segment 21 can also be a flexible segment. After the second ring segment 22 is curled, it and the first ring segment 21 surround and define the second space 201. Specifically, the second ring segment 22 can be close to the object to be measured, and the specific size of the second space 201 can be related to the size of the object to be measured. The second ring segment 22 and the first ring segment 21 can also be unfolded.

[0063] In an exemplary embodiment, the sleeve 1 is connected to the first ring segment 21. In other embodiments, the sleeve 1 may be connected to the second ring segment 22.

[0064] refer to Figure 5 and Figure 6 The magnetic resonance coil assembly 100 provided in the embodiment of the present disclosure may include at least three coil groups 3 , for example, a first coil group 31 , a second coil group 32 and a third coil group 33 .

[0065] The first coil group 31 and the second coil group 32 are both disposed on the casing 1. The second coil group 32 and the first coil group 31 surround the first space. Exemplarily, the second coil group 32 and the first coil group 31 are located on both sides of the first space 101 along the Z-axis direction.

[0066] The third coil group 33 is disposed on the belt body 2 and moves with the belt body 2 to surround the second space 201 when the belt body 2 defines the second space 201. The third coil group 33 includes a portion located in the first segment 21 and a portion located in the second segment 22.

[0067] refer to Figures 2 to 4 The magnetic resonance coil assembly 100 can wrap the palm of the subject under test with the sleeve 1, and at the same time use the flexible section of the belt 2 to wrap around the wrist of the subject under test. The sleeve 1 and the belt 2 can achieve good adhesion to the palm and wrist, the first coil group 31 and the second coil group 32 can correspond to the palm and the back of the hand respectively, and the third coil group 33 can be tapered to fit the wrist. The palm can be detected by using the first coil group 31 and the second coil group 32, and the wrist can be detected by using the third coil group 33.

[0068] The magnetic resonance coil assembly 100 can achieve good detection of complex palm-wrist structures and can adapt to objects of different sizes. The magnetic resonance coil assembly 100 is easy and suitable to wear, and is not easy to fall off after being worn.

[0069] In some embodiments, the unfolded shape of the belt body 2 is a fan ring in the XY plane. The end of the belt body 2 facing the sleeve body 1 is an arc curved away from the sleeve body 1, and the end facing away from the sleeve body 1 is also an arc curved away from the sleeve body 1.

[0070] In some embodiments, the belt body 2 further includes a third ring segment 23, the third ring segment 23 is a flexible segment, and the first ring segment 21 is connected between the second ring segment 22 and the third ring segment 23. Exemplarily, each of the first ring segment 21, the second ring segment 22 and the third ring segment 23 is a fan ring, and the fan ring is bent / bent away from the casing 1. The fan ring can be an arc fan ring or a polygonal fan ring. Exemplarily, the second ring segment 22 is inclined relative to the first ring segment 21, and the inclination direction is away from the casing 1; the third ring segment 23 is inclined relative to the first ring segment 21, and the inclination direction is away from the casing 1.

[0071] like Figure 2 As shown, the sleeve body 1 is connected to the first ring segment 21. The second ring segment 22 and the third ring segment 23 can be of equal length or unequal length along the annular direction. Exemplarily, the second ring segment 22 is provided with Velcro on the outer side relative to the second space 201, and the third ring segment 23 is provided with Velcro on the inner side relative to the second space 201. The second ring segment 22 and the third ring segment 23 can be fixed by Velcro and can achieve overlaps of different lengths. The second ring segment 22 and the third ring segment 23 can also be detachably connected by means of plastic buckles, tethers, etc. The second ring segment 22 and the third ring segment 23 can realize second spaces 201 of different sizes, can detect thin wrists, and can also detect swollen wrists.

[0072] refer to Figure 2 and Figure 3 , the belt 2 can be used by using the second ring segment 22 and the third ring segment 23 in combination. The second ring segment 22 and the third ring segment 23 each have a small operating range, and the belt 2 can be easily wrapped around the object to be tested. When using the magnetic resonance coil assembly 10, it is possible to avoid turning over the object to be tested. Especially in the case where the palm and wrist are not suitable to be touched or adjusted, the wrist can be placed on the unfolded first ring segment 21 of the belt 2, and then the second ring segment 22 and the third ring segment 23 can be connected by the nursing staff. Before fixing the second ring segment 22 and the third ring segment 23, it is also possible to confirm whether the position of the wrist is appropriate relative to the third coil group 33. After placing them appropriately, the second ring segment 22 and the third ring segment 23 are covered and fixed. The magnetic resonance coil assembly 100 has a good user experience.

[0073] refer to Figure 5 , Fig.14 , Fig.16 and Fig.17 In some embodiments, the sleeve 1 includes a first sheet 11 and a second sheet 12. The first sheet 11 and the second sheet 12 can be aligned and opened, and the two can be connected or detachably connected. The first sheet 11 and the second sheet 12 in the aligned state are used to enclose and form a first space 101. Exemplarily, the first sheet 11 is used to abut against the back of the hand, and the second sheet 12 is used to abut against the palm. The first coil group 31 is arranged on the first sheet 11, and the second coil group 32 is arranged on the second sheet 12. The first space 101 of the sleeve 1 can be thinner and wider, which can ensure that the palm is placed in the first space 101, and ensure that the first coil group 31 and the second coil group 32 cover the hand from both sides. The two-piece sleeve 1 can ensure the use function and facilitate the subject to be tested to put into the magnetic resonance coil assembly 100.

[0074] The first space 101 of the sleeve body 1 can be used to place the left hand or the right hand, and can be used to place the left hand or the right hand. The palm can be placed in the first space 101 of the sleeve body 1 with the palm facing upward, or the back of the hand can be placed in the first space 101 with the back of the hand facing upward.

[0075] refer to Figure 5 and Figure 6 In the integrated sleeve 1 or the assembled combined sleeve 1, the coils 30 in the first coil group 31 and the coils 30 in the second coil group 32 are projected in an interlaced manner, which is beneficial to reduce mutual interference, help improve image quality, and ensure the use effect of the magnetic resonance coil assembly 100.

[0076] In some embodiments, the third coil group 33 partially overlaps with the first coil group 31, and the third coil group 33 partially overlaps with the second coil group 32. The coil 30 closest to the sleeve 1 in the third coil group 33 overlaps with the coil 30 closest to the belt 2 in the first coil group 31, or is also called projected staggered.

[0077] In some embodiments, the first coil group 31, the second coil group 32, and the third coil group 33 include three rows of coils 30, respectively. In each coil group 3, three rows of coils 30 are arranged along the extension direction of the first space 101, i.e., the direction Y in the figure; and two adjacent rows of coils 30 overlap. In the first coil group 31 and the second coil group 32, the multiple coils 30 in each row can be arranged along the X-axis direction. In the third coil group 33, the multiple coils 30 in each row can be arranged with an arc in the XY plane, and each row of coils 30 is bent away from the first coil group 31. Exemplarily, two adjacent coils in each row of coils 30 overlap. The magnetic resonance coil assembly 100 can achieve a sufficient number of channels and channel density to ensure image quality.

[0078] In some embodiments, in the coils 30 of the first coil group 31 and the second coil group 32 , two adjacent rows of coils 30 are aligned, so that the first coil group 31 and the second coil group 32 can completely cover the first space 101 .

[0079] Exemplarily, two adjacent rows of coils 30 in the third coil group 33 are staggered, which can ensure that the third coil group 33 flexibly and effectively surrounds the second space 201. As shown in the figure, in the first row of coils 30 close to the sleeve 1, one coil 30 can overlap with two coils 30 in the second row of coils 30; a coil 30 in the second row can overlap with two coils 30 in the first row; and a coil 30 at an edge position can overlap with one in another row.

[0080] Exemplarily, the first coil group 31 includes three rows of coils 30, each row of four coils 30. The second coil group 32 includes three rows of coils 30, each row of coils 30 includes four coils 30. The first coil group 31 and the second coil group 32 can each form an array in the XY direction, and the diagonally opposite coils 30 in the array can overlap. The outer contour of each sheet of the sleeve 1 can be roughly rectangular or rounded rectangular.

[0081] Exemplarily, the third coil group 33 includes three rows of coils 30, each row having eight coils 30. The outer contour of the strip 2 can follow the winding contour of the third coil group 33.

[0082] The coil 30 may be a loop coil, a butterfly coil, a rectangle coil, a square coil, a birdcage coil or other types. Exemplarily, the coils 30 of the first coil group 31 and the second coil group 32 may be elliptical, with the major axis along the Y-axis direction. The coils 30 of the third coil group 33 may also be a loop coil, a butterfly coil, a rectangle coil, a square coil, a birdcage coil or other types.

[0083] The coil 30 may include a flexible conductive wire, which is composed of a coaxial line. The flexible conductive wire includes an inner core layer and a shielding layer arranged outside the inner core layer, the inner core layer is continuously and uninterruptedly surrounded, and the shielding layer has interruptions. In this embodiment, the interruption of the shielding layer plays the role of tuning the capacitor. Dielectric material can be filled between the inner core layer and the shielding layer, and the two are matched to achieve resonance of the flexible conductive wire.

[0084] On the basis of the above embodiment, optionally, the magnetic resonance coil assembly 100 further includes: a transmission cable. One end of the transmission cable is connected to the flexible conductive wire, and the other end of the transmission cable extends out of the coil 30. In this embodiment, the transmission cable is a coaxial transmission line, the shielding layer at the port of the flexible conductive wire is grounded, and the inner core layer at the port of the flexible conductive wire is directly connected to the core wire of the coaxial transmission line of the transmission cable.

[0085] In the magnetic resonance coil assembly provided in this embodiment, the coil 30 is used to form a radio frequency coil for magnetic resonance. The flexible transmission line forms a resonant loop, which can improve the flexibility of the radio frequency coil for magnetic resonance.

[0086] In an exemplary embodiment, the RF coil for magnetic resonance further includes an amplifier, which is separated from the coil 30, that is, the amplifier is arranged outside the bearing range of the flexible protective layer, and the amplifier is connected to the other end of the transmission cable. In this way, the amplifier is separated from the coil 30, that is, the amplifier is separated from the flexible protective layer, which further saves space in the flexible protective layer and improves the flexibility of the RF coil for magnetic resonance.

[0087] The embodiment of the present disclosure provides a magnetic resonance coil assembly 100 . The magnetic resonance coil assembly 100 can be applied to limb scanning or ankle scanning. The magnetic resonance coil assembly 100 includes: a flexible carrier, a first coil assembly 31 , a second coil assembly 32 , and a third coil assembly 33 .

[0088] The flexible carrier includes a combination of one or more of fabric, fur or memory foam material. Exemplarily, the memory foam material may be polyurethane foam. The flexible carrier is an integrated structure or a multi-piece structure. Optionally, the flexible carrier may include a first sheet 11, a second sheet 12 and a belt 2. The flexible carrier may be configured as two belts 2. The materials of the various parts of the flexible carrier may be the same or different.

[0089] The flexible carrier can be adapted to be attached to the limbs, such as the upper limbs and lower limbs; and can adapt to certain size changes. The flexible carrier can be adapted to be attached to the ankle. The flexible carrier can also adapt to the palm and wrist. The combination and size of the various parts of the flexible carrier are configured to be suitable for wearing and taking off.

[0090] Exemplarily, the limbs and ankles of the person being tested can be worn into or removed from the flexible carrier vertically. Exemplarily, the flexible carrier can be attached to the tested part. Exemplarily, refer to Figure 6 When in use, the Y axis can be used as the vertical direction; but not limited to this, for example, the Y axis can be tilted 45 degrees relative to the ground or any other optional placement method. For example, the lower limbs of a lying patient can be placed diagonally upward.

[0091] The flexible carrier includes a front region and a rear region, and the front region and the rear region can refer to two parts opposite to each other along the Z-axis direction. The front region can be used as the rear region, and the rear region can be used as the front region. Exemplarily, the front region includes the second sheet 12, and the rear region includes the first sheet 11.

[0092] The first coil group 31 is arranged in the rear area of ​​the flexible carrier. For example, the first coil group 31 is arranged in the rear area of ​​the fur material. The first coil group 31 can also be called the second coil group.

[0093] The second coil assembly 32 is arranged in the front area of ​​the flexible carrier. For example, the second coil assembly 32 is arranged in the front area of ​​the memory foam material. The second coil assembly 32 can also be referred to as the first coil assembly. The second coil assembly 32 is arranged opposite to the first coil assembly 31, and the first coil assembly 31 and the second coil assembly 32 surround and form a first space 101 for accommodating the detection object.

[0094] The third coil group 33 is arranged in the rear area of ​​the flexible carrier. For example, the third coil group 33 is arranged in the rear area of ​​the fur material. Since the coil 30 can be a flexible conductive wire, the third coil group 33 can be folded around the second space 201.

[0095] The magnetic resonance coil assembly 100 provided in the embodiment of the present disclosure can adapt to the inspected parts with complex structures, such as limbs and ankles, and can effectively fit even if the sizes vary. The magnetic resonance coil assembly 100 provides better comfort for patients and improves the patient experience.

[0096] refer to Figure 7 , exemplarily, the coil 30 is a single-layer structure coil.

[0097] refer to Figure 8 Exemplarily, the coil 30 is a double-layer structure coil. The double-layer structure coil includes an inner ring 301 and an outer ring 302. The inner ring 301 has two ends at the opening of the inner ring, specifically a first wire end 3011 and a second wire end 3012. The outer ring 302 has two ends at the opening of the outer ring, specifically a third wire end 3021 and a fourth wire end 3022. The two ends of the inner ring 301 and the two ends of the outer ring are alternately connected and electrically connected. The double-layer structure coil in the embodiment of the present disclosure refers to a double layer from the inside to the outside. The double-layer structure coil can increase the FOV of the coil 30 without seriously sacrificing the surface signal-to-noise ratio, and can improve the acceleration capability of the coil 30.

[0098] Exemplarily, the coil 30 includes a first connecting section 303 and a second connecting section 304. The first connecting section 303 can electrically connect the first wire end 3011 on the right side with the fourth wire end 3022 on the left side. Exemplarily, the second connecting section 304 can electrically connect the second wire end 3012 on the left side with the third wire end 3021 on the right side.

[0099] refer to Fig. 9 , the signal-to-noise ratio of the coil 30 in the three embodiments is detected. The coil 30 in the first embodiment is a single-layer structure coil with a diameter of 3 cm; the coil 30 in the second embodiment is a single-layer structure coil with a diameter of 4 cm; the coil 30 in the third embodiment is a double-layer structure coil, the diameter of the inner circle 301 is 3 cm, and the diameter of the outer circle 302 is 4 cm. It can be understood that the coverage of the double-layer structure coil is greater than the 3 cm diameter coil 30 in the first embodiment. Fig. 9 As shown, the signal-to-noise ratio (SNR) of the double-layer structure coil is higher than that of the 4 cm diameter coil 30 of the second embodiment.

[0100] refer to Fig.10 and Fig.11 The acceleration performance is tested using overlapping single-layer structure coils and overlapping double-layer structure coils respectively. Fig.11 In the embodiment, the inner turns 301 of two adjacent coils 30 overlap. In other embodiments, in the coil group 3 using a double-layer structure coil, the inner turns 301 of two adjacent coils 30 may not overlap.

[0101] Fig.12 Shows Fig.10 The acceleration performance simulation results of the two-channel coil group are shown, where the acceleration factor (R) is 2. Fig.13 Shows Fig.11 The acceleration performance simulation results of the two-channel coil group are shown, where the acceleration factor is 2. It can be seen that the geometric factor (g factor) of the two-channel coil group of the double-layer structure coil is closer to 1 as a whole, that is, it is better than the geometric factor of the two-channel coil group of the single-layer structure coil. The signal-to-noise ratio of the coil 30 is inversely proportional to the geometric factor: SNR∝1 / g. The signal-to-noise ratio will decrease at a trend of 1 / (g*sqrt(R)).

[0102] The magnetic resonance coil assembly 100 of the embodiment of the present disclosure supports high-fold acceleration. When the magnetic resonance coil assembly 100 is used, the scanning time can be reduced without sacrificing the image quality.

[0103] Fig.14 and Fig.15 In some embodiments, the coil 30 of each of the first coil group 31, the second coil group 32 and the third coil group 33 is a double-layer structure coil.

[0104] refer to Fig.16 In the embodiment of the present disclosure, at least a portion of the belt body 2 may be made of a flexible material. For example, the belt body 2 is about 8 mm thick and made of leather. The third coil group 33 may be embedded in the interlayer of the belt body 2.

[0105] Exemplarily, the material of the sleeve 1 can be a flexible material, which is conducive to adapting to different hand shapes. For example, the first sheet 11 and the second sheet 12 of the sleeve 1 can have leather fabrics. The first coil group 31 and the second coil group 32 can be buried in the interlayer of the sleeve 1. The coil group 3 can use a discrete ultra-flexible coil.

[0106] refer to Fig.17 In some embodiments, the magnetic resonance coil assembly 100 further includes a support block 4. The sleeve 1 can be connected to the support block 4, for example, the first sheet 11 is connected to the support block 4. The belt 2 can also be connected to the support block 4, for example, the first ring segment 21 is connected to the support block 4. The support block 4 can be a hard material, and its top surface is a concave surface, for example, a roughly cylindrical concave surface. After the object to be measured is put on the sleeve 1 and the belt 2, it can be stably and reliably supported by the support block 4 and can be more easily positioned in space. In addition, the magnetic resonance coil assembly 100 can be operated in a relatively standardized manner, which is conducive to ensuring the accuracy of the wearing action.

[0107] Exemplarily, the second sheet 12 can be connected to the first sheet 11, or to the bracket 4. The first sheet 11 and the first ring segment 21 can be fixed to the bracket 4, or can be detachably connected to the bracket 4.

[0108] Exemplarily, the sleeve 1 and the belt 2 can be fixed as one body, which is conducive to quick operation; or they can be detachably connected, which is conducive to flexible adaptation. The sleeve 1 and the belt 2 can be connected to the support block 4 respectively, and the sleeve 1 and the belt 2 can cooperate. The sleeve 1 and the belt 2 can respectively include Velcro to facilitate mutual fixation. The cooperation between the sleeve 1 and the belt 2 can ensure that the first coil group 31 partially overlaps with the third coil group 33, and the second coil group 32 partially overlaps with the third coil group 33.

[0109] In some embodiments, the magnetic resonance coil assembly 100 further includes a circuit element (not shown). The circuit element is located in the support block 4, and the circuit element is electrically connected to the first coil group 31, the second coil group 32, and the third coil group 33. Exemplarily, the circuit element includes a preamplifier, a radio frequency element, etc. By arranging the circuit element outside the sleeve 1 and the belt 2, for example, in the support block 4, the coil 30 can be arranged in the sleeve 1 and the belt 2 in a manner with a higher effective area, thereby increasing the number of channels and the channel density.

[0110] The circuit elements generate heat during operation. Placing the circuit elements outside the sleeve 1 and the belt 2 can help reduce the effect of the heat generated by the circuit elements during operation on the temperature of the sleeve 1 or the belt 2, and can reduce the effect of the heat generated by the circuit elements on the first space 101 and the second space 201.

[0111] In other embodiments, reference Figure 6 and Fig.16The magnetic resonance coil assembly 100 can be oriented in a vertical or inclined direction with the Y-axis direction.

[0112] Exemplarily, the magnetic resonance coil assembly 100 further includes a support block 4. The flexible carrier is disposed on the support block 4. The support block 4 can assist in supporting the patient's body, such as a detected part or a part connected to the detected part. The support block 4 itself can be placed or suspended. The support block 4 can connect at least one of the front area and the rear area.

[0113] At least one of the first coil group 31 , the second coil group 32 and the third coil group 33 is connected to a circuit element, and the circuit element is located in the bracket 4 .

[0114] refer to Fig.18 The embodiment of the present disclosure further provides a magnetic resonance detection system 400 , which includes a signal processor 300 and a magnetic resonance coil assembly 100 . The magnetic resonance coil assembly 100 is electrically connected to the signal processor 300 .

[0115] The magnetic resonance detection system 400 of the disclosed embodiment can achieve good detection of complex limb structures and can adapt to objects of different sizes.

[0116] Exemplarily, the magnetic resonance detection system 400 further includes a bed 200 . The magnetic resonance coil assembly 100 can be placed at different positions of the bed 200 .

[0117] The technical features of the embodiments disclosed above can be combined arbitrarily. 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.

[0118] In the embodiments disclosed above, unless otherwise clearly specified and limited, the execution order of each step is not limited, for example, it can be executed in parallel, or it can be executed successively in different orders. The sub-steps of each step can also be executed alternately. The above-mentioned various forms of processes can be used, and steps can be reordered, added or deleted, as long as the desired results of the technical solution provided in the embodiment of the present disclosure can be achieved, and this document does not limit it here.

[0119] The above disclosed embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of patent protection of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the scope of patent protection required by the utility model. Therefore, the scope of patent protection of the utility model shall be based on the attached claims.

Claims

1. A magnetic resonance coil assembly, characterized in that include: A casing (1) is arranged to form a first space (101); A first coil group (31) is arranged on the sleeve (1); A second coil group (32) is arranged on the casing (1), and the second coil group (32) and the first coil group (31) surround the first space (101); A belt body (2) is connected to one end of the sleeve body (1) along the extension direction of the first space (101), and the unfolded shape of the belt body (2) is bent away from the first space (101); the belt body (2) comprises a first ring segment (21) and a second ring segment (22), the second ring segment (22) is a flexible segment, and the second ring segment (22) can be surrounded with the first ring segment (21) to form a second space (201) connected to the first space (101) and can be unfolded; and The third coil group (33) is arranged on the belt body (2) and is capable of surrounding the second space (201).

2. The magnetic resonance coil assembly according to claim 1, characterized in that: The belt body (2) further comprises a third ring segment (23), wherein the third ring segment (23) is a flexible segment, and the first ring segment (21) is connected between the second ring segment (22) and the third ring segment (23).

3. The magnetic resonance coil assembly according to claim 1, characterized in that: The sleeve (1) comprises a first sheet (11) and a second sheet (12); the first sheet (11) and the second sheet (12) are capable of being matched and opened; the first sheet (11) and the second sheet (12) in the matched state are used to enclose and form the first space (101); The first coil group (31) is arranged on the first sheet (11), and the second coil group (32) is arranged on the second sheet (12).

4. The magnetic resonance coil assembly according to claim 1, wherein: The third coil group (33) partially overlaps with the first coil group (31), and the third coil group (33) partially overlaps with the second coil group (32); The coils (30) in the first coil group (31) and the coils (30) in the second coil group (32) are projected in an interlaced manner.

5. The magnetic resonance coil assembly according to claim 4, characterized in that: The first coil group (31), the second coil group (32) and the third coil group (33) respectively include three rows of coils (30) arranged and overlapped along the extension direction, and two adjacent coils (30) in each row of the coils (30) overlap; In the coils (30) of each of the first coil group (31) and the second coil group (32), two adjacent rows of coils (30) are aligned; and in the third coil group (33), two adjacent rows of coils (30) are staggered.

6. The magnetic resonance coil assembly according to claim 1, characterized in that: The coils (30) of each of the first coil group (31), the second coil group (32) and the third coil group (33) are double-layer structure coils, the double-layer structure coils comprising an inner coil (301) and an outer coil (302), the two ends of the inner coil (301) at the inner coil opening and the two ends of the outer coil (302) at the outer coil opening being alternately connected and electrically connected.

7. The magnetic resonance coil assembly according to claim 1, characterized in that: The belt body (2) is detachably connected to the sleeve body (1).

8. The magnetic resonance coil assembly according to any one of claims 1 to 7, characterized in that: It also comprises a support block (4), the sleeve body (1) and the first ring segment (21) being connected to the support block (4); At least one of the first coil group (31), the second coil group (32) and the third coil group (33) is connected to a circuit element, and the circuit element is located in the support block (4).

9. A magnetic resonance coil assembly suitable for limb scanning or ankle scanning, characterized in that: include: A flexible carrier, comprising one or more of fabric, fur or memory foam material, wherein the flexible carrier is an integrated structure or a multi-piece structure; A first coil group (31) is arranged in the rear area of ​​the flexible carrier; A second coil group (32) is arranged in the front area of ​​the flexible carrier, and the second coil group (32) is arranged opposite to the first coil group (31), and the first coil group (31) and the second coil group (32) surround and form a first space (101) for accommodating a detection object; as well as The third coil group (33) is arranged in the rear area of ​​the flexible carrier, and the third coil group (33) can be folded around the second space (201).

10. The magnetic resonance coil assembly according to claim 9, characterized in that: It also comprises a support block (4), and the flexible carrier is arranged on the support block (4); At least one of the first coil group (31), the second coil group (32) and the third coil group (33) is connected to a circuit element, and the circuit element is located in the support block (4).

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