Test model for near-infrared brain imaging device

Abstract

The application discloses a test model of near-infrared brain imaging equipment, which comprises a transmitting device, a receiving device, a light shield and a power device. The transmitting device comprises an upper shell for mounting a transmitter of an infrared imaging equipment, an upper POM inner core inlaid in the upper shell and an upper hollow light shield fixed at the lower part of the upper POM inner core, and the upper hollow light shield is provided with an upper light passing hole opposite to the transmitter. The receiving device comprises a lower shell for mounting a receiver of the infrared imaging equipment, a lower POM inner core inlaid in the lower shell and a lower hollow light shield fixed at the upper part of the lower POM inner core, and the receiver is arranged opposite to the transmitter, and the lower hollow light shield is provided with a lower light passing hole opposite to the transmitter. The light shield comprises a shield body and a first light passing hole arranged on the shield body, and the light shield reciprocatingly and linearly moves between the transmitting device and the receiving device, and the direction of the reciprocating and linear movement is perpendicular to the infrared light emitted by the transmitter. The power device drives the light shield to reciprocatingly and linearly move.

Description

TECHNICAL FIELD

[0001] The present application relates to a test model of near-infrared brain imaging equipment, belonging to the field of testing. BACKGROUND

[0002] The characteristics of cerebral blood flow, blood oxygen and their functional connectivity are important for the diagnosis and evaluation of cerebral vascular or cellular diseases. The currently developed imaging techniques for measuring tissue hemodynamics include nuclear magnetic resonance imaging, positron emission tomography, single photon emission computed tomography, etc., but there are many limitations, such as large volume, high cost, poor flexibility, existence of ionizing radiation, etc. Near-infrared spectroscopy (FNIRS) is a simple, fast, portable and low-cost non-invasive measurement method for biological blood oxygen. However, the current near-infrared spectroscopy equipment often has the shortcomings of difficult verification method, difficult to unify the variables of the subjects, and difficult to control the conditions of the subjects during the research and development process. This will hinder the research and development and testing of near-infrared brain imaging equipment.

[0003] The existing test model mainly includes two kinds, the first kind adopts a liquid model, which is prepared by mixing milk, PBS and other liquids in a certain proportion, and the preparation method is complicated, and at the same time, the model is a disposable model, which has human subjective factors; the second kind adopts a solid model, which is mainly prepared by mixing colloid, enulipid and other materials and freezing and condensing, and this kind of model still has the disadvantages of complicated preparation method, difficult to preserve, and unable to change the attenuation multiple, etc., so the above two kinds of models are not suitable for the detection of the current near-infrared brain imaging technology. SUMMARY

[0004] The purpose of the present application is to provide a test model of near-infrared brain imaging equipment, which can reduce the interference of external objective factors, avoid the influence of human subjective factors, make the test have repeatability, and enhance the signal-to-noise ratio of the data.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: a test model of near-infrared brain imaging equipment, comprising:

[0006] The emitting device comprises an upper shell for installing an emitter of an infrared imaging equipment, an upper POM inner core inlaid in the interior of the upper shell, and an upper hollow light shield fixed at the lower part of the upper POM inner core, and the upper hollow light shield is provided with an upper light transmission hole opposite to the emitter;

[0007] The receiving device comprises a lower shell for installing a receiver of an infrared imaging equipment, a lower POM inner core inlaid in the interior of the lower shell, and a lower hollow light shield fixed at the upper part of the lower POM inner core, and the receiver is arranged opposite to the emitter, and the lower hollow light shield is provided with a lower light transmission hole opposite to the emitter;

[0008] The present application relates to a test model for testing the infrared light receiving and transmitting capability of a mobile terminal, which comprises a transmitting device, a receiving device, a power device, an upper hollow shade, a lower hollow shade and a shade.

[0009] The power device drives the shade to move linearly.

[0010] Further, the power device comprises a power source and a transmission device, wherein the power source is an electric motor, and the transmission device connects the power source and the shade to convert the rotating motion of the power source into linear motion.

[0011] Further, the transmission device is a speed lever.

[0012] Further, the test model further comprises a limiting component, which comprises limiting columns arranged on both sides of the speed lever.

[0013] Further, the limiting component further comprises limiting holes formed in the long strip-shaped shade and guiding positioning columns installed on the upper shell or the lower shell.

[0014] Further, the device further comprises an adjusting component for adjusting the light intensity, which is installed between the transmitting device and the shade.

[0015] Further, the adjusting component comprises a plurality of inserts, which are provided with second light transmission holes.

[0016] Further, the upper hollow shade or the lower hollow shade is provided with an insert slot for the inserts.

[0017] Further, the upper shell, the upper hollow shade, the lower shell, the lower hollow shade and the shade are all made of aluminum alloy material treated by sand blasting, non-glare paint coating and infrared absorber coating.

[0018] Further, the test model further comprises a control device and an operation screen, which are signal connected with the operation screen, the transmitter, the receiver and the power device.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] The test model of the near-infrared brain imaging device provided in the application simulates the optical properties similar to human brain tissue by arranging the POM inner core in the transmitting device and the receiving device, and simulates the change of human brain tissue by the rapid reciprocating linear motion of the light-shielding sheet between the transmitting device and the receiving device, so as to realize the simulation of the change of human brain tissue and adapt to the detection of the near-infrared brain imaging technology. Compared with the prior art, the test model can reduce the interference of external objective factors and avoid the influence of human subjective factors, so that the test has repeatability and the signal-to-noise ratio of the data is enhanced.

[0021] In addition, because the test model uses the POM material similar to the optical properties of human brain tissue, the manufacturing process is simple, the structure is stable after manufacturing, and the test model is easy to save. In addition, the POM material is easy to obtain, so the cost of the test model is low.

[0022] The above description is only a summary of the technical scheme of the application. In order to more clearly understand the technical means of the application and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiments of the application and with the help of the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structural diagram of the external structure of the test model of the near-infrared brain imaging device shown in an embodiment of the application.

[0024] Figure 2 The structural diagram of the internal part structure of the test model of the near-infrared brain imaging device shown in an embodiment of the application. Figure 1

[0025] Figure 3 The structural diagram of the internal part structure of the test model of the near-infrared brain imaging device shown in an embodiment of the application. Figure 2

[0026] Figure 4 The exploded view of the test model shown in an embodiment of the application. Figure 3

[0027] Figure 5 The working principle diagram of the test model shown in an embodiment of the application. Figure 1 DETAILED DESCRIPTION The technical scheme of the application will be described in detail below with the help of the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0028]

[0029] ​​​​In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Please see Figure 1 and Figure 2 The test model of the near-infrared brain imaging device shown in a preferred embodiment of this application includes a housing 8, a transmitting device 1, a receiving device 2, a light shield 3, a power unit 4, an operation screen 7, and a control device (not shown).

[0033] In this embodiment, the housing 8 is a cuboid, with a downward-facing recess 81 formed on the top. A light-shielding plate 3, a power unit 4, and a control unit are arranged inside the housing 8. A transmitting device 1 and a receiving device 2 are arranged within the recess 81, with the transmitting device 1 exposed outside the housing 8. An operation screen 7 is located on the top of the housing 8 and near one side of the housing 8.

[0034] Please see Figures 2 to 4 The transmitting device 1 includes an upper housing 11 for mounting the transmitter 12 of the infrared imaging equipment, an upper POM core 13 embedded inside the upper housing 11, and an upper hollow light-shielding plate 14 fixed to the lower part of the upper POM core 13. The upper hollow light-shielding plate 14 has an upper light-transmitting hole 141 relative to the transmitter 12, that is, an upper light-transmitting hole 141 is provided on the upper hollow light-shielding plate 14 for the infrared light emitted by the transmitter 12 to pass through. The upper housing 11 is mounted on the upper part of the groove 81, abutting against the lower transmitting device 2, and is circumferentially secured by the housing 8.

[0035] The receiving device 2 comprises a lower housing 21 for mounting the receiver 22 of the infrared imaging device, a lower POM inner core 23 inlaid inside the lower housing, and a lower hollow light shield 24 fixed on the upper part of the lower POM inner core 23, the receiver 22 is arranged opposite to the transmitter 12, and the lower hollow light shield 24 is provided with a lower light passing hole 241 opposite to the transmitter 12, that is, the lower hollow light shield 24 is provided with the lower light passing hole 241 for the receiver 22 to receive the infrared light. The lower housing 21 is mounted at the lower part of the groove 81, and one side thereof abuts against the upper housing 11 and the other side thereof abuts against the bottom of the groove 81, and is clamped by the box body 8 in the circumferential direction.

[0036] In the embodiment, the upper POM inner core 13 and the lower POM inner core 23 are both cylindrical white POM. In order to ensure that the attenuation multiple is greater than 40 dB and the size of the test model is as small as possible, the white POM in the embodiment is designed to be a cylindrical shape with a diameter of 60 mm and a height of 30 mm. Of course, the white POM can also be designed to have other sizes or other shapes, mainly to simulate the optical properties of human brain tissue.

[0037] In the embodiment, the upper housing 11 and the lower housing 21 are both aluminum alloy treated by sand blasting, painting with matt paint, and painting with infrared absorber. By using the aluminum alloy, the interference of external light can be eliminated without affecting the test light path. The aluminum alloy material is also used for the manufacture of the light shield 3, the upper hollow light shield 14, and the lower hollow light shield 24.

[0038] The upper hollow light shield 14 and the lower hollow light shield 24 are located between the upper POM inner core 13 and the lower POM inner core 23. In the embodiment, the upper hollow light shield 14 and the lower hollow light shield 24 serve as isolation plates to ensure that the light path can only pass through the upper light passing hole 141 and the lower light passing hole 241, thereby increasing the attenuation multiple. In the embodiment, in order to make the attenuation multiple greater than 40 dB, the aperture of the upper light passing hole 141 and the lower light passing hole 241 is set to 8 mm. Of course, the aperture of the upper light passing hole 141 and the lower light passing hole 241 can also be set to other sizes, mainly to limit the light path. The upper hollow light shield 14 and the lower hollow light shield 24 are fixed to the upper housing 11 and the lower housing 21, respectively, by fasteners. When the upper hollow light shield 14 and the lower hollow light shield 24 are fixed to the upper housing 11 and the lower housing 21, the upper POM inner core 13 and the lower POM inner core 23 can be fixed in the upper housing 11 and the lower housing 21.

[0039] The light shield 3 comprises a shield body 31 and a first light passing hole 32 arranged on the shield body 31, and the light shield 3 reciprocally moves linearly (a1-a2 movement direction) between the transmitting device 1 and the receiving device 2. Figure 2 The direction of the reciprocating linear motion is perpendicular to the infrared light emitted by the transmitter 12.

[0040] In order to limit the distance of the reciprocating linear motion of the shade 3, the test model further comprises a limiting component, which comprises a limiting hole 33 formed in the long strip-shaped shade 3 and a guide positioning column 52 mounted on the upper shell 11 or the lower shell 21. The long side of the limiting hole 33 is consistent with the direction of the reciprocating linear motion of the shade 3, and cooperates with the guide positioning column 52 to limit the distance of the reciprocating linear motion of the shade 3. In the embodiment, the guide positioning column 52 is vertically arranged on the lower shell 21, and the upper shell 11 is provided with a butt joint sleeve 53 sleeved with the guide positioning column 52.

[0041] The power device 4 drives the reciprocating linear motion of the shade 3. In the embodiment, the power device 4 comprises a power source and a transmission device, the power source is an electric motor 41, and the transmission device connects the power source and the shade 3 to convert the rotary motion of the power source into reciprocating linear motion. In the embodiment, the transmission device is a speed multiplier 42, which adopts a crank slider structure to enable the shade 3 to accelerate the return and the progress, thereby realizing the rapid change of the state of the model. The power device 4 is connected to one end of the shade 3 to provide power, specifically, the shade 3 cooperates with the speed multiplier 42 through a connecting hole 34 arranged on the shade 3 and a connecting column (not numbered) on the speed multiplier 42 to realize the power supply to the shade 3.

[0042] In the embodiment, in order to further reduce the abrasion of the guide positioning column 52 to the shade 3 during the motion, the limiting component further comprises a limiting column 51 arranged on both sides of the speed multiplier 42. The limiting column 51 can limit the motion of the speed multiplier 42 within a certain angle, so that the amplitude of the reciprocating linear motion of the shade 3 is small, and the abrasion of the shade 3 is reduced.

[0043] In other embodiments, the power device 4 can also be realized by a gas cylinder, which converts the pressure energy of compressed gas into mechanical energy in pneumatic transmission, and can also realize the reciprocating linear motion effect of the shade 3. Similarly, other ways can also be used to realize the function of the power device 4, as long as the shade 3 can complete the reciprocating linear motion.

[0044] In the embodiment, the test model further comprises an adjusting component 6 for adjusting the intensity of light, which is mounted between the emitting device 1 and the shade 3. The adjusting component 6 comprises a plurality of inserts 61, the inserts 61 are provided with second light transmission holes 62, and the aperture of the second light transmission holes 62 on the inserts 61 is different. In use, the light path is limited by inserting the inserts, and the size of the light path is changed by replacing the inserts, thereby changing the attenuation multiple of the light and realizing the simulation of different changes of the human brain tissue.

[0045] The upper or lower hollow light shield 14 or 24 is provided with an insertion slot 142 for the insertion of the insertion piece 61.

[0046] The control device is in signal connection with the operation panel 7, the transmitter 12, the receiver 22 and the power device 4. The overall control of the test model is realized by the control device through the operation on the operation panel 7. The operation panel 7 realizes visual adjustment, through which the movement of the light shield 3 can be changed in time, and the response sensitivity of the device to be tested can be understood in real time through the display screen.

[0047] The specific use process of the device is as follows:

[0048] First, power on the device, understand the state of the device by checking the operation panel 7, and then insert the transmitter and receiver probes of the device to be tested into the transmitter 12 and receiver 22 of the device respectively, to complete the preliminary preparation of the device. Then, click the start key on the operation panel 7, the motor 41 rotates quickly, drives the speed lever 42 to move, and thus drives the light shield 3 to reciprocate linearly. Insert the insertion piece 61, due to the action of the guide positioning column 52, when the light shield 3 moves to one side, the central axes of the first light hole 32 and the second light hole 62 are misaligned, and the light cannot be emitted from the transmitter 12 to the receiver 22. Then, according to the test requirements, the light shield 3 can be controlled to return to the other side at intervals through the operation panel 7, so that the central axes of the first light hole 32 and the second light hole 62 are coincided, the light is smoothly emitted from the transmitter 12 to the receiver 22, and the response time is displayed on the display screen 7.

[0049] Please refer to Figure 5 , which discloses the acceleration principle of the present application. The present application can switch the light path within 1ms to realize the change from different attenuation multiples to complete blocking, and from complete blocking to different attenuation multiples, so as to improve the accuracy of the response time of the near-infrared brain detection device. The present application uses the principle of the crank slider structure to accelerate the return and progress of the light shield by the power provided by the motor, so as to ensure that the switching time is within 1ms. By using different initial manual insertion pieces, the user can change the corresponding attenuation multiple, so as to achieve the theoretical unlimited upper limit, and the lower limit depends on the structure of the device, so as to expand the range of attenuation multiple of the product.

[0050] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0051] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A test phantom for a near-infrared brain imaging device, characterized in that, The test model comprises: a transmitting device, which comprises an upper shell for mounting an infrared emitter, an upper POM inner core inlaid in the upper shell, and an upper hollow light shield fixed to the lower part of the upper POM inner core, the upper hollow light shield being provided with an upper light hole opposite the emitter; a receiving device, which comprises a lower shell for mounting an infrared receiver, a lower POM inner core inlaid in the lower shell, and a lower hollow light shield fixed to the upper part of the lower POM inner core, the receiver being arranged opposite the emitter, the lower hollow light shield being provided with a lower light hole opposite the emitter; a light shield, which comprises a shield body and a first light hole provided on the shield body, the light shield reciprocating linearly between the transmitting device and the receiving device, the direction of the reciprocating linear motion being perpendicular to the infrared light emitted by the emitter; a power device, which drives the reciprocating linear motion of the light shield; the power device comprises a power source and a transmission device, the power source being an electric motor, the transmission device connecting the power source and the light shield to convert the rotary motion of the power source into reciprocating linear motion; the transmission device is a speed lever; the test model further comprises an adjusting component for adjusting the light intensity, the adjusting component being mounted between the transmitting device and the light shield; the adjusting component comprises a plurality of inserts, the inserts being provided with second light holes; the upper hollow light shield or the lower hollow light shield is provided with an insertion slot for the inserts. The test model further comprises a limiting component, the limiting component comprising limiting columns arranged on both sides of the speed lever.

2. The test phantom for near-infrared brain imaging apparatuses according to claim 1, wherein The limiting component further comprises a limiting hole formed in the light shield in a strip shape and a guide positioning column mounted on the upper shell or the lower shell.

3. The test phantom for near-infrared brain imaging devices of claim 2, wherein, The upper shell, the upper hollow light shield, the lower shell, the lower hollow light shield, and the light shield are all made of an aluminum alloy material treated by sandblasting, polishing, and coating of an infrared absorber.

4. The test phantom for near-infrared brain imaging apparatuses as claimed in claim 1, wherein The test model further comprises a control device and an operation screen, the control device being signal-connected with the operation screen, the emitter, the receiver, and the power device.

5. The test phantom for near-infrared brain imaging apparatuses as claimed in claim 1, wherein ​

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