Multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging

Abstract

The utility model discloses a multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging, which comprises a plurality of optical fiber mounting seats which are connected through connecting rods. A plurality of hinge grooves are formed in the optical fiber mounting seat in the outer circumferential direction, connecting rods are movably connected in the hinge grooves, spherical hinge parts used for being movably connected with the hinge grooves of the optical fiber mounting seat are arranged at the two ends of each connecting rod respectively, and a detector positioning hole is formed in the middle of the optical fiber mounting seat; the device has the advantages of being wide in applicability, high in fitting degree and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of near-infrared brain function imaging, and in particular relates to a multi-freedom optical fiber cap used for near-infrared brain function imaging. Background Art

[0002] Due to the sensitivity to motion artifacts, electromagnetic interference, and claustrophobic imaging, existing brain functional imaging technologies, such as functional magnetic resonance imaging (fMRI), are not suitable for children, especially infants, nor for research and application in natural settings and other high ecological validity scenarios. Near-infrared spectroscopy (fNIRS) is considered to be a brain functional imaging technology that can meet the above requirements, providing a new observation method for basic research and clinical application of brain science.

[0003] Based on the strong penetrating power of near-infrared light, different numbers of near-infrared light emitting probes and near-infrared light absorbing probes are placed on the surface of the subject's head in a resting state or a task state, and near-infrared light is irradiated to measure the absorption and changes of near-infrared light by brain tissue in a single channel or multiple channels. While the light absorption changes, various indicators in the corresponding areas of the cerebral cortex are measured. The changes in various indicators are reconstructed in two-dimensional or three-dimensional images, and the functional state of the cerebral cortex is reflected through the display of dynamic images.

[0004] Based on the high scattering and low absorption characteristics of human tissue, the detection system adopts a reflective detection method, that is, the light source and the detector are located on the same side of the object being detected. The farther the distance between the light source and the detector, the greater the penetration depth and the greater the light loss. Near-infrared brain functional imaging is usually equipped with a special helmet, and infrared data is collected through the probe on the helmet.

[0005] The problem with the existing technology is that due to the different head circumferences and head shapes of the subjects, the probe on the hard hat and helmet does not fit well, and the thickness and elasticity of the cloth hat are difficult to balance, which affects the accuracy of the infrared data and the imaging effect. Summary of the invention

[0006] The purpose of the utility model is to provide a multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging, which has the advantages of wide applicability, high fit and convenient operation, in view of the problems existing in the prior art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-degree-of-freedom fiber optic cap for near-infrared brain function imaging, comprising a plurality of fiber optic mounting seats, wherein the plurality of fiber optic mounting seats are connected by connecting rods; the fiber optic mounting seats are provided with a plurality of hinge grooves along the outer circumferential direction, and the connecting rods are movably connected in the hinge grooves, and the two ends of the connecting rods are respectively provided with spherical hinge parts for movably connecting with the hinge grooves of the fiber optic mounting seats, and a detector positioning hole is provided in the middle of the fiber optic mounting seats.

[0008] In the above scheme, the spherical hinges at both ends of the connecting rod are movably connected to the hinge grooves of the optical fiber mounting seat. The connecting rod can swing left and right or up and down, and the angle can be flexibly adjusted in multiple directions, so that the end faces of several optical fiber mounting seats can be easily fitted with the shape of the scalp. The detector positioning hole in the middle of the optical fiber mounting seat is used for detector connection, so that the detector maintains good contact with the scalp and is facing the scalp, thereby ensuring the signal collection effect.

[0009] The detector may include a probe, a light source or other detection equipment. This solution uses a hard universal joint to connect the nearest hard fiber mounting base, which has sufficient freedom and also ensures the positioning of the detector. It can adapt to a variety of head circumferences and ensure the spacing fit.

[0010] Furthermore, the hinge groove comprises an arc-shaped groove body 1, an arc-shaped groove body 2 is provided on the side surface of the arc-shaped groove body 1, and the spherical hinge part is movably connected to the arc-shaped groove body 2.

[0011] The arc groove body is provided on one side to facilitate the position adjustment of the connecting rod along the length direction of the arc groove body, and the connection is convenient. The arc groove body is used to be hinged with the spherical hinge part to ensure the connection and positioning of the end of the connecting rod.

[0012] Furthermore, the width of the arc-shaped groove body 1 is greater than the radial dimension of the rod body of the connecting rod.

[0013] The width of the arc-shaped groove body is greater than the radial dimension of the rod body corresponding to the connecting rod, leaving space so that the connecting rod can swing up and down in a direction perpendicular to the end face of the optical fiber mounting seat.

[0014] Furthermore, the center positions of the arc-shaped groove body 1 and the arc-shaped groove body 2 on the optical fiber mounting seat correspond to the axis position of the detector positioning hole, and the lengths of the connecting rods are consistent.

[0015] The center positions of the arc-shaped trough body 1 and the arc-shaped trough body 2 are located on the axis of the detector positioning hole, and the lengths of the connecting rods are consistent, which is convenient for processing and determining the detector spacing.

[0016] Furthermore, the length of the connecting rod ranges from 20 mm to 40 mm.

[0017] The corresponding setting of the connecting rod length range is convenient for detector arrangement and is suitable for near-infrared brain functional imaging of adults and children.

[0018] Furthermore, each of the optical fiber mounting seats is connected to 1-4 connecting rods.

[0019] Arrange the number of connecting rods around the fiber mount according to the required detector locations.

[0020] Furthermore, the optical fiber mounting seat is a cylindrical structure, and four hinge grooves are equidistantly arranged along the outer circumference of the optical fiber mounting seat.

[0021] The cylindrical structure facilitates the setting of the hinge grooves and the swinging of the connecting rods, and the equidistant arrangement of the hinge grooves facilitates the peripheral arrangement of the connecting rods.

[0022] Furthermore, the detector positioning hole is a circular hole, and the diameter of the detector positioning hole is 6mm-12mm.

[0023] The circular hole has a simple structure and is convenient for positioning and installing the detector.

[0024] Furthermore, a tether is connected between the optical fiber mounting seats or connecting rods on both sides.

[0025] The multi-degree-of-freedom fiber optic cap is stabilized between the scalp by a tether.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. The fiber optic mounting seat is connected by the universal joint structure on both sides of the connecting rod, which ensures sufficient freedom. The end face of the fiber optic mounting seat is positioned with the scalp surface to ensure the fit of the detector and the scalp. The fiber optic mounting seat and the detector fit the scalp, which is suitable for a variety of head circumferences and head shapes, has a wide range of applications, high fit, and ensures the shaping effect;

[0028] 2. By setting the arc groove body 1 and the arc groove body 2 on the optical fiber mounting seat, and matching the connecting rod of fixed length, the distance between the optical fiber mounting seat and the detector is guaranteed to be fixed during the bonding process, and the distribution of the detector points is guaranteed. The overall structure is simple and the operation is convenient;

[0029] 3. The combination of a hard fiber mount and a connecting rod overcomes the problems of thickness and elastic connection of traditional cloth caps and the fit of hard caps. While having a high fit, it is also convenient for positioning the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural stereogram of Example 1 of the utility model;

[0031] Figure 2It is a structural cross-sectional view of the optical fiber mounting seat in Example 1 of the utility model;

[0032] Figure 3 It is a structural stereogram of embodiment 2 of the utility model;

[0033] In the figure: 1. Optical fiber mounting seat; 2. Connecting rod; 3. Spherical hinge; 4. Arc-shaped slot body 1; 5. Arc-shaped slot body 2; 6. Detector positioning hole; 7. Tether. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0035] Example 1

[0036] like Figure 1-2 As shown, a multi-degree-of-freedom fiber optic cap for near-infrared brain function imaging includes a plurality of fiber optic mounting seats 1, and the plurality of fiber optic mounting seats 1 are connected by connecting rods 2; the fiber optic mounting seats 1 are provided with a plurality of hinge grooves along the outer circumferential direction, and the connecting rods 2 are movably connected in the hinge grooves, and both ends of the connecting rods 2 are respectively provided with spherical hinge parts 3 for movably connecting with the hinge grooves of the fiber optic mounting seats 1, and a detector positioning hole 6 is provided in the middle of the fiber optic mounting seat 1.

[0037] In the above scheme, the spherical hinge parts 3 at both ends of the connecting rod 2 are movably connected with the hinge grooves of the optical fiber mounting seat 1. The connecting rod 2 can swing left and right or up and down, and can be flexibly adjusted in angles in multiple directions, so that the end faces of several optical fiber mounting seats 1 can be conveniently fitted with the shape of the scalp. The detector positioning hole 6 in the middle of the optical fiber mounting seat 1 is used for detector connection, so that the detector maintains good contact with the scalp and is facing the scalp, thereby ensuring the signal collection effect.

[0038] The detector may include a probe, a light source or other detection equipment. This solution uses a hard universal joint to connect the nearest hard optical fiber mounting seat 1, which has a relatively rich degree of freedom and also ensures the positioning of the detector, and can adapt to a variety of head circumferences to ensure spacing fit.

[0039] Furthermore, the hinge groove comprises an arc-shaped groove body 1 4 , an arc-shaped groove body 2 5 is provided on the side surface of the arc-shaped groove body 1 4 , and the spherical hinge portion 3 is movably connected to the arc-shaped groove body 2 5 .

[0040] The arc groove body 1 4 is provided to facilitate the position adjustment of the connecting rod 2 along the length direction of the arc groove body 1 4, and the connection is convenient. The arc groove body 2 5 is used to be hinged with the spherical hinge part 3 to ensure the connection and positioning of the end of the connecting rod 2.

[0041] Furthermore, the width of the arc-shaped groove body 4 is greater than the radial dimension of the connecting rod 2.

[0042] The width of the arc-shaped groove body 4 is greater than the radial dimension of the connecting rod 2, leaving space for the connecting rod 2 to swing up and down in a direction perpendicular to the end face of the optical fiber mounting seat 1.

[0043] In the embodiment, the connecting rod 2 swings up and down at an angle range of ±5°-±10°, the arc groove body 4 is set along the outer circle of the optical fiber mounting seat 1 at an angle range of less than 60°, and the cross-section of the connecting rod 2 is circular or polygonal.

[0044] Furthermore, the center positions of the arc-shaped groove body 1 4 and the arc-shaped groove body 2 5 on the optical fiber mounting seat 1 correspond to the axis position of the detector positioning hole 6 , and the lengths of the connecting rods 2 are consistent.

[0045] The center positions of the arc-shaped groove body 1 4 and the arc-shaped groove body 2 5 are located on the axis of the detector positioning hole 6 , and the connecting rods 2 have the same length, which is convenient for processing and determining the detector spacing.

[0046] Furthermore, the length of the connecting rod 2 ranges from 20 mm to 40 mm.

[0047] The corresponding length range of the connecting rod 2 is convenient for detector arrangement and is suitable for near-infrared brain function imaging of adults and children.

[0048] During near-infrared brain functional imaging, the detector spacing is a fixed value, 30mm for adults and 25mm for children. The movable joints can be rotated so that the detectors are close to the scalp, but the spacing remains unchanged, which is convenient for positioning and use with a variety of head shapes.

[0049] Furthermore, each of the optical fiber mounting seats 1 is connected to 1-4 connecting rods 2.

[0050] The number of connecting rods 2 around the optical fiber mounting seat 1 is arranged according to the required detector points.

[0051] When the hole position needs to be customized, the length of the connecting rod 2 can also be adjusted. For example, the position of the optical fiber mounting seat 1 and the length of the connecting rod 2 can be designed according to the 10-20 EEG system diagram, 10-10 EEG system diagram or the customized hole position to ensure the fit of the whole head.

[0052] Furthermore, the optical fiber mounting seat 1 is a cylindrical structure, and the optical fiber mounting seat 1 is provided with four hinge grooves equidistantly along the outer circumference.

[0053] The cylindrical structure facilitates the setting of the hinge groove and the swinging of the connecting rod 2, and the equidistant arrangement of the hinge grooves facilitates the peripheral arrangement of the connecting rod 2.

[0054] The height of the optical fiber mounting seat 1 is 3 mm-7 mm.

[0055] Furthermore, the detector positioning hole 6 is a circular hole, and the diameter of the detector positioning hole 6 is 6 mm-12 mm.

[0056] The circular hole has a simple structure and is convenient for positioning and installing the detector.

[0057] The detector positioning hole 6 can be connected to the detector by snapping, and a thread can also be provided in the detector positioning hole 6 to be threadedly connected to the detector.

[0058] Example 2

[0059] like Figure 3 As shown, a multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging in this embodiment is further modified as follows on the basis of Embodiment 1:

[0060] Furthermore, a tether 7 is connected between the optical fiber mounting seats 1 on both sides. The positioning stability between the multi-degree-of-freedom optical fiber cap and the scalp is maintained by the tether 7. The tether 7 is an elastic rope.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-degree-of-freedom optical fiber cap for near-infrared brain functional imaging, It is characterized in that It comprises a plurality of optical fiber mounting seats, which are connected by connecting rods; the optical fiber mounting seats are provided with a plurality of hinge grooves along the outer circumferential direction, the hinge grooves are movably connected with connecting rods, both ends of the connecting rods are respectively provided with spherical hinge parts for movably connecting with the hinge grooves of the optical fiber mounting seats, and a detector positioning hole is provided in the middle of the optical fiber mounting seats.

2. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 1, It is characterized in that The hinge groove comprises an arc-shaped groove body 1, an arc-shaped groove body 2 is provided on the side surface of the arc-shaped groove body 1, and the spherical hinge part is movably connected with the arc-shaped groove body 2.

3. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 2, It is characterized in that The width of the arc-shaped groove body 1 is greater than the radial dimension of the rod body of the connecting rod.

4. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 2, It is characterized in that The center positions of the arc-shaped groove body 1 and the arc-shaped groove body 2 on the optical fiber mounting seat correspond to the axis position of the detector positioning hole, and the lengths of the connecting rods are consistent.

5. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 4, It is characterized in that The length of the connecting rod ranges from 20mm to 40mm.

6. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 1, It is characterized in that Each of the optical fiber mounting seats is connected to 1-4 connecting rods.

7. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 1, It is characterized in that The optical fiber mounting seat is a cylindrical structure, and four hinge grooves are equidistantly arranged along the outer circumference of the optical fiber mounting seat.

8. The multi-degree-of-freedom optical fiber cap for near-infrared brain function imaging according to claim 1, It is characterized in that The detector positioning hole is a circular hole, and the diameter of the detector positioning hole is 6mm-12mm.

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