Shoulder joint coil device
By designing a flexible shoulder coil device, the problem that traditional coils cannot fit the shoulder joint is solved, achieving higher comfort and imaging clarity.
Patent Information
- Application Number
- CN202421789199.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Traditional shoulder coils cannot fit close to the shoulder joint during magnetic resonance examination, resulting in poor patient comfort, low image signal-to-noise ratio and unclear imaging.
A shoulder joint coil device is designed, which uses a flexible first shell to wrap the shoulder joint, and a coil assembly, output matching board and preamplifier are provided therein to improve fit and imaging clarity through the flexible circuit board and multi-layer coil layout.
It improves the patient's comfort in magnetic resonance examination, enhances signal fit, and significantly improves the clarity and quality of imaging.
Smart Images
Figure CN222955426U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of magnetic resonance imaging, and particularly relates to a shoulder joint coil device. Background Art
[0002] Nuclear Magnetic Resonance Imaging (NMRI), also known as spin imaging and also abbreviated as MRI, utilizes the principle of nuclear magnetic resonance. Based on the different attenuations of the released energy in different structural environments within a substance, it detects the emitted electromagnetic waves through an externally applied gradient magnetic field and draws a structural image of the interior of the object.
[0003] In magnetic resonance examinations, traditional shoulder joint coils have the problem that they cannot be closely and comfortably attached to the outer surface of the shoulder joint, resulting in poor comfort for patients during use. Since the shoulder coil cannot well cover the shoulders of the examinees, the signal-to-noise ratio of the images is poor and the imaging is not clear. Summary of the Utility Model
[0004] To solve the deficiencies of the prior art, the utility model provides a shoulder joint coil device with a soft texture and clear imaging.
[0005] The technical solution of the utility model is a shoulder joint coil device, including: a flexible first housing and a second housing connected to the top of the first housing. The first housing wraps around and fits to the shoulder joint to collect signals from the fitting part. A coil assembly, an output matching board, and a preamplifier are arranged inside the first housing. The output matching board is fixed in the coil assembly and electrically connected to the preamplifier. The preamplifier is electrically connected to a cable fixed on the second housing, and the signal is transmitted to an external imaging device through the cable.
[0006] Preferably, the first housing includes a soft pad that bends and fits to the circumference of the shoulder joint and an inner housing that is connected to the soft pad and fits above the shoulder joint;
[0007] The coil assembly includes a first coil group and a second coil group. The first coil group is arranged inside the soft pad and is used to collect signals from the fitting part of the soft pad. The second coil group is arranged inside the inner housing and is used to collect signals from the fitting part of the inner housing.
[0008] Preferably, the soft pad includes a first soft pad, a second soft pad, and a third soft pad. The first soft pad and the second soft pad are symmetrically arranged on both sides of the third soft pad, thereby forming a shoulder joint accommodation cavity between the first soft pad, the second soft pad, and the third soft pad;
[0009] A first flexible circuit board is disposed inside the first soft pad, a second flexible circuit board is disposed inside the second soft pad, and a third flexible circuit board is disposed inside the third soft pad.
[0010] Preferably, the included angle between the first soft pad and the third soft pad is equal to the included angle between the second soft pad and the third soft pad, and the included angle is between 90 degrees and 110 degrees.
[0011] Preferably, operation holes are formed in the first soft pad, the second soft pad, and the third soft pad, and the output matching boards disposed inside the first soft pad, the second soft pad, and the third soft pad are all located in the corresponding operation holes.
[0012] Preferably, the arrangement mode of the coil assembly is annular cross-overlapping distribution, the coil assembly includes at least one figure-eight coil, and the position where the figure-eight coil is located is perpendicular to the main magnetic field.
[0013] Preferably, the coil assembly is a 16-channel coil, including: a first coil, a second coil, a third coil, a fourth coil, a fifth coil, a sixth coil, a seventh coil, an eighth coil, a ninth coil, a tenth coil, an eleventh coil, a twelfth coil, a thirteenth coil, a fourteenth coil, a fifteenth coil, and a sixteenth coil; wherein, the eighth coil located at the position perpendicular to the main magnetic field is a figure-eight coil.
[0014] Preferably, at least part of the first coil, the second coil, the third coil, the fourth coil, the fifth coil, the sixth coil, at least part of the seventh coil, at least part of the eighth coil, the ninth coil, the tenth coil, the eleventh coil, the twelfth coil, at least part of the thirteenth coil, at least part of the fourteenth coil, and at least part of the fifteenth coil are disposed in the first coil group; wherein,
[0015] At least part of the first coil, the second coil, the third coil, the fourth coil, the fifth coil, at least part of the sixth coil, at least part of the seventh coil, and at least part of the eighth coil are disposed on the first flexible circuit board, and adjacent parts of adjacent coils overlap;
[0016] At least part of the eighth coil, the ninth coil, the tenth coil, the eleventh coil, the twelfth coil, at least part of the thirteenth coil, at least part of the fourteenth coil, and at least part of the fifteenth coil are disposed on the second flexible circuit board, and adjacent parts of adjacent coils overlap;
[0017] At least part of the fifth coil, at least part of the sixth coil, at least part of the thirteenth coil, and at least part of the fourteenth coil are disposed on the third flexible circuit board, adjacent parts of the fifth coil and the sixth coil overlap, and adjacent parts of the thirteenth coil and the fourteenth coil overlap;
[0018] The coils on the first flexible circuit board and the coils on the second flexible circuit board are symmetrically arranged and are relatively disposed on both sides of the third flexible circuit board;
[0019] At least a part of the sixth coil, at least a part of the seventh coil, at least a part of the eighth coil, at least a part of the fourteenth coil, at least a part of the fifteenth coil, and the sixteenth coil are disposed in the second coil group, and adjacent parts of adjacent coils overlap.
[0020] Preferably, the inner shell is fixedly connected to the bottom of the second housing, and the preamplifier and the balun located at the top of the inner shell are arranged inside the second housing.
[0021] Preferably, the cable is fixed to the top of the second housing, and an angle of 10 degrees to 30 degrees is formed between the cable outlet direction and the human body axis.
[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0023] ⑴ The first housing that wraps the shoulder joint is made of a flexible material to meet the imaging requirements of patients with different body shapes, increasing the fit between the first housing and the patient, improving the comfort of use, and achieving a better imaging effect during magnetic resonance examination;
[0024] ⑵ The shoulder joint coil device adopts a symmetrical layout, ensuring that the device is applicable to both left and right shoulder joints;
[0025] ⑶ The arrangement method of the coil assembly is a circular cross-overlapping distribution. The coil assembly includes figure-eight coils, and the figure-eight coils are more conducive to receiving signals perpendicular to the main magnetic field, and the imaging is clearer;
[0026] ⑷ By using a 16-channel coil to form a channel array to surround the shoulder joint, the imaging clarity is better;
[0027] ⑸ By opening operation holes at corresponding positions on the output matching board, it is convenient to debug the output matching board, thereby ensuring the signal quality;
[0028] ⑹ Since an angle of 10 degrees to 30 degrees is formed between the cable outlet direction and the human body axis, the movement space of the cable is more suitable for the space requirements of the magnetic resonance imaging device and the hospital bed. Description of the Drawings
[0029] Figure 1 is a schematic diagram of the use state of the shoulder joint coil device of the present utility model;
[0030] Figure 2 is an exploded view of the shoulder joint coil device of the present utility model;
[0031] Figure 3 is Figure 1 a schematic structural view of the first housing in
[0032] Figure 4 is Figure 1 a schematic structural view of the second housing in
[0033] Figure 5 is Figure 3 a schematic structural view of the coil assembly in
[0034] Figure 6 is Figure 5 a developed schematic view of the coil assembly in
[0035] Figure 7 is a schematic circuit connection view of the shoulder joint coil device of the present utility model.
[0036] Description of main component symbols:
[0037] The first housing 1; the soft pad 11; the first soft pad 111; the second soft pad 112; the third soft pad 113; the operation hole 114; the cover plate 115; the inner housing 12; the skeleton 13; the first flexible circuit board 14; the second flexible circuit board 15; the third flexible circuit board 16;
[0038] The second housing 2; the notch 21;
[0039] The coil assembly 3; the first coil group 31; the second coil group 32;
[0040] The output matching board 4;
[0041] The preamplifier 5;
[0042] The cable 6; the cable sheath 61;
[0043] The balun 7;
[0044] The first coil 81; the second coil 82; the third coil 83; the fourth coil 84; the fifth coil 85; the sixth coil 86; the seventh coil 87; the eighth coil 88; the ninth coil 89; the tenth coil 90; the eleventh coil 91; the twelfth coil 92; the thirteenth coil 93; the fourteenth coil 94; the fifteenth coil 95; the sixteenth coil 96. Specific embodiments
[0045] The present utility model will be further described in detail below in conjunction with the accompanying drawings:
[0046] Please refer to Figures 1 to 2As shown in the figure, the present utility model provides a shoulder joint coil device, which includes: a flexible first housing 1 and a second housing 2 connected to the top of the first housing 1. The first housing 1 wraps around and fits to the shoulder joint to collect signals from the fitting part. A coil assembly 3, an output matching board 4, and a preamplifier 5 are arranged in the first housing 1. The output matching board 4 is fixed in the coil assembly 3 and electrically connected to the preamplifier 5. The preamplifier 5 is electrically connected to a cable 6 fixed on the second housing 2, and the signal is transmitted to an external imaging device through the cable 6. Since the first housing 1 that wraps around the shoulder joint is made of a flexible material to meet the imaging needs of patients with different body sizes, the fitting degree between the first housing 1 and the patient is increased, the comfort of use is improved, and a better imaging effect can be achieved in magnetic resonance examinations.
[0047] Please refer to Figure 2 、 Figure 5 、 Figure 6 As shown in the figure, the first housing 1 includes a soft pad 11 that bends and fits around the circumference of the shoulder joint and an inner shell 12 that is connected to the soft pad 11 and fits above the shoulder joint. The coil assembly 3 includes a first coil group 31 and a second coil group 32. The first coil group 31 is arranged in the soft pad 11 to collect signals from the fitting part of the soft pad 11. The second coil group 32 is arranged in the inner shell 12 to collect signals from the fitting part of the inner shell 12.
[0048] Please refer to Figure 2 As shown in the figure, the soft pad 11 includes a first soft pad 111, a second soft pad 112, and a third soft pad 113. The first soft pad 111 and the second soft pad 112 are symmetrically arranged on both sides of the third soft pad 113, thus forming a shoulder joint accommodation cavity between the first soft pad 111, the second soft pad 112, and the third soft pad 113. Since the first soft pad 111 and the second soft pad adopt a symmetrical layout, it is ensured that both the left and right shoulder joints can be applied.
[0049] A first flexible circuit board 14 is arranged in the first soft pad 111, a second flexible circuit board 15 is arranged in the second soft pad 112, and a third flexible circuit board 16 is arranged in the third soft pad 113.
[0050] It should be noted that the angle between the first soft pad 111 and the third soft pad 113 is equal to the angle between the second soft pad 111 and the third soft pad 113. This angle is between 90 degrees and 110 degrees to further meet the imaging needs of patients with different body sizes. In this embodiment, as Figure 2 shown in the figure, the first soft pad 111 and the second soft pad 112 are folded inward and both form a 90-degree angle with the third soft pad 113.
[0051] Please refer to Figure 2 、 Figure 3As shown, operation holes 114 are provided on the first cushion pad 111, the second cushion pad 112, and the third cushion pad 113. The output matching boards 4 provided inside the first cushion pad 111, the second cushion pad 112, and the third cushion pad 113 are all located in the corresponding operation holes 114, and the output matching boards 4 can be conveniently debugged through the operation holes 114, thereby ensuring the signal quality.
[0052] Please refer to Figure 5 、 Figure 6 As shown, the arrangement of the coil assembly 3 is a circular cross-overlapping distribution. The coil assembly 3 includes at least one figure-eight coil, and the position of the figure-eight coil is perpendicular to the main magnetic field. By setting the figure-eight coil, it is more conducive to receiving signals perpendicular to the main magnetic field, and the imaging is clearer. Specifically, the coil assembly 3 is a 16-channel coil. By using 16 coils to form a channel array surrounding the shoulder joint, the imaging clarity is better.
[0053] Please refer to Figure 5 、 Figure 6 As shown, the coil assembly 3 includes: a first coil 81, a second coil 82, a third coil 83, a fourth coil 84, a fifth coil 85, a sixth coil 86, a seventh coil 87, an eighth coil 88, a ninth coil 89, a tenth coil 90, an eleventh coil 91, a twelfth coil 92, a thirteenth coil 93, a fourteenth coil 94, a fifteenth coil 95, and a sixteenth coil 96; among them, the eighth coil 88 located at a position perpendicular to the main magnetic field is a figure-eight coil, as Figure 5 、 Figure 6 shown, the eighth coil 88 is distributed on the first cushion pad 111, the second cushion pad 112, and the inner shell 12.
[0054] At least part of the first coil 81, the second coil 82, the third coil 83, the fourth coil 84, the fifth coil 85, the sixth coil 86, at least part of the seventh coil 87, at least part of the eighth coil 88, the ninth coil 89, the tenth coil 90, the eleventh coil 91, the twelfth coil 92, the thirteenth coil 93, at least part of the fourteenth coil 94, and at least part of the fifteenth coil 95 are arranged in the first coil group 31; among them,
[0055] At least part of the first coil 81, the second coil 82, the third coil 83, the fourth coil 84, the fifth coil 85, at least part of the sixth coil 86, at least part of the seventh coil 87, and at least part of the eighth coil 88 are arranged on the first flexible circuit board 14, and the adjacent parts of adjacent coils overlap;
[0056] At least a part of the eighth coil 88, the ninth coil 89, the tenth coil 90, the eleventh coil 91, the twelfth coil 92, at least a part of the thirteenth coil 93, at least a part of the fourteenth coil 94, and at least a part of the fifteenth coil 95 are disposed on the second flexible circuit board 15, and adjacent parts of adjacent coils overlap;
[0057] At least a part of the fifth coil 85, at least a part of the sixth coil 86, at least a part of the thirteenth coil 93, and at least a part of the fourteenth coil 94 are disposed on the third flexible circuit board 16. Adjacent parts of the fifth coil 85 and the sixth coil 86 overlap, and adjacent parts of the thirteenth coil 93 and the fourteenth coil 94 overlap;
[0058] The coils on the first flexible circuit board 14 and the coils on the second flexible circuit board 15 are symmetrically arranged on both sides of the third flexible circuit board 16; by adopting a symmetrical design for the coils on the front and back sides of the shoulder joint, it is ensured that both the left and right shoulder joints can be applicable.
[0059] Please refer to Figure 6 As shown, at least a part of the sixth coil 86, at least a part of the seventh coil 87, at least a part of the eighth coil 88, at least a part of the fourteenth coil 94, at least a part of the fifteenth coil 95, and the sixteenth coil 96 are disposed in the second coil group 32, and adjacent parts of adjacent coils overlap.
[0060] Please refer to Figure 1 、 Figure 2 As shown, the inner shell 12 is fixedly connected to the bottom of the second housing 2, and the preamplifier 5 and the balun 7 located at the top of the inner shell 12 are disposed inside the second housing 2.
[0061] In this embodiment, as Figure 2 、 Figure 3 As shown, the preamplifier 5 and the balun 7 are fixed to the top of the inner shell 12 through the skeleton 13. There are two groups of preamplifiers 5, each group including 8 preamplifiers. The two groups of preamplifiers are symmetrically fixed on both sides of the skeleton 13 and are respectively located above the first soft pad 111 and the second soft pad 112; there are three groups of baluns 7. The first group includes 4 baluns, and the second group and the third group both include 6 baluns; the first group of baluns is fixed directly above the skeleton 13, and the second group of baluns and the third group of baluns are juxtaposed and fixed directly below the skeleton 13.
[0062] As Figure 7 shown, the output matching board 4 fixed to the coil assembly 3 is electrically connected to the preamplifier 5, the preamplifier 5 is electrically connected to the balun 7, the balun 7 is electrically connected to the cable 6, and the collected signal is amplified by the preamplifier 5 and then transmitted to the cable 6 through the balun 7; since the balun 7 can play a role in anti-interference, the quality of the output signal is ensured.
[0063] Please refer to Figure 1 As shown, the cable 6 is fixed to the top of the second housing 2, and an angle α of 10 degrees to 30 degrees is formed between the outgoing direction of the cable 6 and the human body axis, so that the movement space of the cable 6 is more suitable for the space requirements of the magnetic resonance imaging device and the hospital bed.
[0064] In this embodiment, as Figure 2 、 Figure 7 shown, a balun 7 is also installed at the lower end of the cable 6. The balun 7 is fixed inside the second housing 2. The signal received by the cable 6 is output to the external imaging device after being interfered by the balun 7 at the lower end of the cable 6, so as to further improve the quality of the output signal.
[0065] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 shown, the specific assembly steps of the shoulder joint coil device provided by the present utility model are as follows:
[0066] I. Assemble the first housing 1
[0067] ⑴ Fix the 4-channel output matching board 4 on the outer surface of the first flexible circuit board 14, fix the 4-channel output matching board 4 on the outer surface of the second flexible circuit board 15, and fix the 2-channel output matching board 4 on the outer surface of the third flexible circuit board 16;
[0068] ⑵ After completion, connect the three flexible circuit boards together and place them correspondingly inside the first soft pad 111, the second soft pad 112, and the third soft pad 113. The output matching board 4 is located at the operation hole 114 opened on the first soft pad 111, the second soft pad 112, and the third soft pad 113; Cover plates 115 are provided on both sides of the operation hole 114, and the cover plates 115 are fixed to the soft pad 11 with screws to cover the operation hole 114;
[0069] ⑶ Fold the first soft pad 111 and the second soft pad 112 on both sides of the third soft pad 113 inward by 90 degrees, align them with the screw posts of the inner shell 12 and paste them on the inner surface, and screw them to fix; Fix the output matching board 4 on the inner surface of the inner shell 12;
[0070] ⑷ Install baluns on the skeleton 13. There are three groups of baluns. The first group has 4 baluns, and the second and third groups have 6 baluns; Fix the first group on the directly above of the skeleton 13 with screws, and fix the second and third groups on the directly below of the skeleton 13;
[0071] ⑸ Install preamplifiers on the skeleton 13. There are two groups of preamplifiers, and each group has 8 preamplifiers. Fix the two groups of preamplifiers on the left and right sides of the skeleton 13 with screws;
[0072] ⑹ Align the assembled framework 13 with the two highest screw posts at the top of the inner shell 12 and fix them with screws to form the structure of the first housing 1 as shown in Figure 3 Figure 1.
[0073] II. Assemble the second housing 2
[0074] Pass the cable 6 through the cable protection sleeve 61 and the balun 7 in sequence, and install the cable protection sleeve 61 and the balun 7 into the notch 21 at the top of the second housing 2 to form the structure of the second housing 2 as shown in Figure 4 Figure 2.
[0075] III. Connect the first housing 1 and the second housing 2
[0076] Connect the coil assembly 3, the output matching board 4, the preamplifier 5 and the balun 7 connected in sequence in the first housing 1 to the cable 6 in the second housing through wires, so as to form the circuit connection as shown in Figure 7 Figure 3 to transmit signals. After the debugging is completed, fix the second housing 2 and the first housing 1 together with screws.
[0077] The above are only the preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.
Claims
1. A shoulder joint coil device, characterized in that: include: A flexible first shell and a second shell connected to the top of the first shell, the first shell wraps around and fits the shoulder joint to collect signals from the fitted part; a coil assembly, an output matching board and a preamplifier are arranged in the first shell, the output matching board is fixed in the coil assembly and is electrically connected to the preamplifier, the preamplifier is electrically connected to a cable fixed on the second shell, and the signal is transmitted to an external imaging device through the cable.
2. The shoulder joint coil device according to claim 1, characterized in that: The first shell includes a soft pad that is bent and fits around the shoulder joint, and an inner shell that is connected to the soft pad and fits above the shoulder joint; The coil assembly includes a first coil group and a second coil group. The first coil group is arranged in the cushion to collect signals from the cushion fitting part; the second coil group is arranged in the inner shell to collect signals from the inner shell fitting part.
3. The shoulder joint coil device according to claim 2, characterized in that: The soft pad includes a first soft pad, a second soft pad and a third soft pad, wherein the first soft pad and the second soft pad are symmetrically arranged on both sides of the third soft pad, so as to form a shoulder joint accommodating cavity between the first soft pad, the second soft pad and the third soft pad; A first flexible circuit board is arranged in the first soft pad, a second flexible circuit board is arranged in the second soft pad, and a third flexible circuit board is arranged in the third soft pad.
4. The shoulder joint coil device according to claim 3, characterized in that: The included angle between the first soft pad and the third soft pad is equal to the included angle between the second soft pad and the third soft pad, and the included angle is between 90 degrees and 110 degrees.
5. The shoulder joint coil device according to claim 3, characterized in that: The first soft pad, the second soft pad and the third soft pad are all provided with operation holes, and the output matching plates arranged in the first soft pad, the second soft pad and the third soft pad are all located in the corresponding operation holes.
6. The shoulder joint coil device according to claim 3, characterized in that: The coil assembly is arranged in a circular cross-overlapping distribution, and the coil assembly includes at least one 8-shaped coil, and the 8-shaped coil is located perpendicular to the main magnetic field.
7. The shoulder joint coil device according to claim 6, characterized in that: The coil assembly is a 16-channel coil, including: a first coil, a second coil, a third coil, a fourth coil, a fifth coil, a sixth coil, a seventh coil, an eighth coil, a ninth coil, a tenth coil, an eleventh coil, a twelfth coil, a thirteenth coil, a fourteenth coil, a fifteenth coil, and a sixteenth coil; wherein the eighth coil located perpendicular to the main magnetic field is an 8-shaped coil.
8. The shoulder joint coil device according to claim 7, characterized in that: The first coil, the second coil, the third coil, the fourth coil, the fifth coil, at least a portion of the sixth coil, at least a portion of the seventh coil, at least a portion of the eighth coil, the ninth coil, the tenth coil, the eleventh coil, the twelfth coil, the thirteenth coil, at least a portion of the fourteenth coil, and at least a portion of the fifteenth coil are arranged in the first coil group; wherein, The first coil, the second coil, the third coil, the fourth coil, at least a portion of the fifth coil, at least a portion of the sixth coil, at least a portion of the seventh coil, and at least a portion of the eighth coil are arranged on the first flexible circuit board, and adjacent portions of adjacent coils overlap; At least part of the eighth coil, the ninth coil, the tenth coil, the eleventh coil, the twelfth coil, at least part of the thirteenth coil, at least part of the fourteenth coil, and at least part of the fifteenth coil are arranged on the second flexible circuit board, and adjacent parts of adjacent coils overlap; At least part of the fifth coil, at least part of the sixth coil, at least part of the thirteenth coil, and at least part of the fourteenth coil are arranged on the third flexible circuit board, the fifth coil overlaps with an adjacent part of the sixth coil, and the thirteenth coil overlaps with an adjacent part of the fourteenth coil; The coil on the first flexible circuit board is symmetrically arranged with the coil on the second flexible circuit board, and is relatively arranged on two sides of the third flexible circuit board; At least part of the sixth coil, at least part of the seventh coil, at least part of the eighth coil, at least part of the fourteenth coil, at least part of the fifteenth coil, and the sixteenth coil are arranged in the second coil group, and adjacent parts of adjacent coils overlap.
9. The shoulder joint coil device according to claim 2, characterized in that: The inner shell is fixedly connected to the bottom of the second shell, and the preamplifier and balun located on the top of the inner shell are arranged on the inner side of the second shell.
10. The shoulder joint coil device according to claim 1, characterized in that: The cable is fixed on the top of the second shell, and an angle of 10 to 30 degrees is formed between the outlet direction of the cable and the axis of the human body.