A phantom device for measuring the performance of optical transmission pathways in near-infrared brain functional imaging equipment

Abstract

The present application provides a phantom device for measuring the performance of an optical transmission path in a near-infrared brain function imaging device, which relates to the technical field of optical transmission path performance measurement. The phantom device is portable and includes a housing and an optical attenuation component. The housing is provided with a plurality of paired probe interfaces, which are used to insert a paired transmitting probe and a receiving probe in a near-infrared brain function imaging device. The optical attenuation component is arranged in the housing and includes a light-transmitting layer, a weak light layer and an attenuation body arranged in layers. The weak light layer is provided with a first through hole corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe. The light-transmitting layer is arranged close to the probe interface relative to the attenuation body, so that the near-infrared light emitted by the transmitting probe is sequentially transmitted to the receiving probe via the light-transmitting layer, the first through hole of the weak light layer and the attenuation body. The above-mentioned phantom device is portable, and multiple optical transmission paths can be detected simultaneously through a plurality of paired probe interfaces, thereby improving the detection efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of optical transmission path performance measurement, and in particular to a phantom device for measuring the optical transmission path performance in a near-infrared brain function imaging device. Background Art

[0002] The optical system of near-infrared brain function imaging equipment usually has multiple light transmission related components including a light source, a cable, a transmitting probe (the light source can be set in the transmitting probe), a receiving probe and a light receiving unit. These components can constitute an optical transmission path for transmitting near-infrared light to the brain and / or an optical transmission path for receiving near-infrared light from the brain. The performance of the optical transmission path in the near-infrared brain function imaging equipment will directly affect the detection results of the equipment. Generally speaking, the optical performance of the near-infrared brain function imaging equipment needs to be tested before leaving the factory to ensure that the optical system of the factory-made near-infrared brain function imaging equipment has qualified optical performance. In addition, during the continuous use of the near-infrared brain function imaging equipment, it is also necessary to regularly use measuring equipment to test and evaluate the optical performance of the equipment, so as to perform equipment maintenance based on the test and evaluation results.

[0003] At present, there is no portable test phantom device on the market that is convenient for operators to carry and is used to measure the performance of the optical transmission path in the near-infrared brain function imaging device. During the use and maintenance of the near-infrared brain function imaging device, the test phantom device is usually required to be used multiple times, but the current test phantom device is usually large in size, and is not convenient to carry and operate. In order to ensure the accuracy of the measurement results, the test phantom device needs to be maintained and cleaned after being used for a period of time, such as cleaning the dust accumulated in the probe installation hole, and the light attenuation parameters of the phantom device after cleaning should be consistent with those before cleaning to ensure the accuracy of subsequent measurement results. If the installation position of the relevant components deviates during cleaning, the component material is damaged, etc., the light attenuation parameters of the corresponding hole position will change. At this time, the light attenuation parameters of the test phantom device must be recalibrated to ensure the accuracy of subsequent measurement results. Summary of the invention

[0004] In response to the above-mentioned technical problems existing in the prior art, the present application provides a phantom device for measuring the performance of optical transmission paths in near-infrared brain functional imaging equipment, which is portable and can simultaneously detect multiple optical transmission paths through multiple paired probe interfaces, thereby improving detection efficiency.

[0005] The embodiment of the present application provides a phantom device for measuring the performance of the optical transmission path in a near-infrared brain function imaging device, wherein the phantom device is portable and includes a housing and a light attenuation component. The housing is provided with a plurality of probe interfaces arranged in pairs, and the probe interfaces arranged in pairs are used to plug in the paired transmitting probe and receiving probe in the near-infrared brain function imaging device. The light attenuation component is arranged in the housing, and the light attenuation component includes a light-transmitting layer, a weak light layer and an attenuation body arranged in layers, wherein the weak light layer is provided with a first through hole corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe, and the light-transmitting layer is arranged close to the probe interface relative to the attenuation body, so that the near-infrared light emitted by the transmitting probe is transmitted to the receiving probe in sequence via the light-transmitting layer, the first through hole of the weak light layer and the attenuation body.

[0006] In some embodiments, the light attenuation component further includes a blocking layer, which is stacked on a side of the light-transmitting layer away from the weak-light layer, and the blocking layer is provided with a second through hole corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe.

[0007] In some embodiments, the size of the first through hole corresponding to the light receiving end of the receiving probe is greater than or equal to the size of the light receiving end of the receiving probe.

[0008] In some embodiments, a light absorbing layer is disposed on a side of the attenuation body away from the weak light layer, and the light absorbing layer is used to absorb near-infrared light transmitted to the attenuation body.

[0009] In some embodiments, the weak light layer is made of polyetheretherketone material; and / or the light-transmitting layer and the attenuation body are made of polyoxymethylene resin or epoxy resin material.

[0010] In some embodiments, the thickness of the light-transmitting layer is smaller than the thickness of the attenuating body.

[0011] In some embodiments, the optical attenuation component is used to cause near-infrared light on the optical transmission path between the paired transmitting probe and receiving probe to attenuate at a preset attenuation parameter, wherein the difference between the preset attenuation parameter and a reference attenuation parameter is within a preset range.

[0012] In some embodiments, a communication interface is provided on the shell, the phantom device further comprises a storage module disposed in the shell, the storage module stores the preset attenuation parameters, and the communication interface is used to output the preset attenuation parameters.

[0013] In some embodiments, the shell includes a cover plate covering the optical attenuation component, and a first guide member is arranged on the cover plate. The first guide member is arranged around the probe interface, and a partition cavity is formed on the first guide member, and a cable connected to the transmitting probe or the receiving probe is placed in the partition cavity.

[0014] In some embodiments, the shell includes a cover plate covering the optical attenuation component, and a plurality of second guide members are provided on the upper surface of the cover plate. The plurality of second guide members are located on the outside of the plurality of paired probe interfaces, and the second guide members located on the same side are used to cooperate in gathering the cables connected to the transmitting probe and / or the receiving probe.

[0015] In some embodiments, a support pad is provided at the upper opening of the second through hole, and a third through hole communicating with the probe interface is provided on the support pad, and the light-emitting end of the transmitting probe or the light-receiving end of the receiving probe extends into the second through hole through the third through hole, and the support pad is used to form a gap between the light-emitting end of the transmitting probe or the light-receiving end of the receiving probe and the light-transmitting layer.

[0016] In some embodiments, the preset attenuation parameters include at least one of the light attenuation parameters of each pair of probe interfaces in the phantom device and the deviation of the light attenuation parameters of each pair of probe interfaces from a reference attenuation parameter, wherein the preset attenuation parameters are used to correct the measurement results of the phantom device.

[0017] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows: the present application can reduce the amount of emitted near-infrared light entering the attenuation body through the light-transmitting layer and the weak-light layer, and reduce the amount of scattered near-infrared light emitted by the receiving probe, thereby reducing the volume of the phantom device, and cooperating with the attenuation body to make the phantom device portable, so that the phantom device can be flexibly used in different scenarios, that is, the operator can carry the phantom device near the near-infrared brain function imaging device to measure the performance of the optical transmission path in the near-infrared brain function imaging device, and the phantom device has a plurality of paired probe interfaces, and the optical attenuation component can cause the near-infrared light on the optical path between the plurality of paired transmitting probes and the receiving probes to attenuate, thereby achieving simultaneous measurement of a relatively large number of A plurality of optical transmission paths are used for detection, so that the detection efficiency is improved. In addition, the light-transmitting layer is not provided with a hole structure, so that external dust and other dirt will directly fall onto the light-transmitting layer, and will not pass through the light-transmitting layer to fall into the structure below, that is, will not fall onto the weak-light layer and the attenuation body. In this way, when cleaning the light attenuation component, it is sufficient to directly clean the light-transmitting layer. It has the advantages of convenient cleaning and high maintainability, and will not damage the structure below the light-transmitting layer, especially, will not damage the weak-light layer which is easily damaged during cleaning. The light attenuation component has high maintainability, can extend the service life of the phantom device, and can reduce the operation steps of cleaning the light attenuation component, so that the light attenuation parameters of the phantom device after cleaning can be kept as consistent as possible with those before cleaning, and no re-calibration is required, so as to ensure the accuracy of subsequent measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0019] Figure 1 is a schematic diagram of a light transmission path in a near-infrared brain function imaging device according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the phantom device according to an embodiment of the present application;

[0021] Figure 3 This is a front view of the phantom device according to an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the internal structure of the phantom device according to an embodiment of the present application;

[0023] Figure 5 This is a simplified diagram of the internal structure of the phantom device according to an embodiment of the present application.

[0024] The components indicated by the reference numerals in the figures are:

[0025] 1. Shell; 11. Communication interface; 12. Probe interface; 13. Cover plate; 14. First guide piece; 15. Second guide piece; 2. Transmitting probe; 3. Receiving probe; 4. Light attenuation component; 41. Light-transmitting layer; 42. Weak-light layer; 43. Attenuation body; 44. First through hole; 45. Blocking layer; 46. Second through hole; 5. Light-absorbing layer; 6. Support pad; 61. Third through hole; 7. Elastic bushing. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific implementation examples. The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation examples, but are not intended to limit the present application.

[0027] The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] In the present application, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0029] All terms (including technical terms or scientific terms) used in this application have the same meaning as those understood by ordinary technicians in the field to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0031] The embodiment of the present application provides a phantom device for measuring the performance of an optical transmission path in a near-infrared brain function imaging device.

[0032] First, the optical transmission pathway in the near-infrared brain function imaging device in the present application is introduced. The optical transmission pathway in the near-infrared brain function imaging device in the present application is used to characterize the transmission path of the near-infrared light used when the near-infrared brain function imaging device is in the working state, which specifically refers to the components of the near-infrared brain function imaging device related to optical transmission in the complete state. It can be understood that the complete state of the near-infrared brain function imaging device means that the components related to optical transmission have been assembled or connected, and the device can directly enter the working state. For example, the head cap of the near-infrared brain function imaging device is worn on the head of the subject, and the device can enter the working state to collect the near-infrared signal of the subject's head after it is turned on. It can be understood that the components related to optical transmission may include at least one of the light source part, the transmitting probe, the receiving probe, the transmission cable (such as optical fiber) between the transmitting probe and the light source part, the transmission cable between the receiving probe and the optical processing module, and the photoelectric conversion module. The above-mentioned light transmission-related components can be arbitrarily combined and coordinated to form an optical transmission path for emitting near-infrared light to the brain and / or an optical transmission path for receiving near-infrared light from the brain. For example, some light source units are directly installed in the transmitting probe, and the near-infrared light emitted by them can directly enter the subject's head without being transmitted through optical fiber. In near-infrared brain function imaging devices used in scenarios such as nuclear magnetic resonance and transcranial magnetic resonance, the light source unit is arranged inside the main unit, and the near-infrared light emitted by the light source unit can be transmitted to the transmitting probe through an optical fiber cable and then enter the subject's head. For example, in some near-infrared brain function imaging devices, the near-infrared light from the subject can be transmitted to the optical processing module through optical fiber. In other near-infrared brain function imaging devices, the optical processing module can be integrated on a head cap, and the near-infrared light from the subject can be directly acquired by the optical processing module integrated on the head cap.

[0033] In summary, there is an optical transmission path in the near-infrared brain function imaging device that transmits near-infrared light to the object and / or transmits near-infrared light from the object. As long as the light-emitting end of the optical transmission path that transmits near-infrared light to the object and the light-receiving end that receives near-infrared light from the object are installed on the phantom device provided in the present application, the performance of the optical transmission path can be measured. Therefore, the present application does not make specific limitations on the setting position of the optical transmission path in the near-infrared brain function imaging device, the design of specific components constituting the optical transmission path, the combination of each component, the matching method, etc.

[0034] For example, the schematic diagram of the light transmission path in the near-infrared brain functional imaging device can be as follows: Figure 1 As shown, Figure 1As shown, the near-infrared brain function imaging device includes a host, a transmission cable, a transmitting probe S and a receiving probe D respectively connected to each transmission cable, and the transmitting probe S and the receiving probe D are assembled on a head cap, wherein the host includes a light source unit and a light processing module, and the processing module may specifically include a photoelectric converter, a processor, etc. When the near-infrared brain function imaging device is used in a complete state, the near-infrared light emitted by the light source unit enters the transmitting probe S installed on the head cap via the transmission cable, and is emitted from the transmitting probe S to enter the subject's head, and the near-infrared light from the subject's head is obtained by the receiving probe D installed on the head cap, and reaches the light processing module via the transmission cable, and the light processing module processes and analyzes the near-infrared light signal and transmits it to the light processing module or the display, at which time the light transmission path in the near-infrared brain function imaging device in the complete state includes the host, the transmission cable, the transmitting probe S and the receiving probe D. This is only used as an example and does not constitute a limitation on the present application scheme.

[0035] like Figures 2 to 5 As shown, the phantom device is portable, and includes a housing 1 and a light attenuation component 4. The housing 1 is provided with a plurality of probe interfaces 12 arranged in pairs, and the probe interfaces 12 arranged in pairs are used to insert the paired transmitting probe 2 and receiving probe 3 in the near infrared brain functional imaging device. The light attenuation component 4 is arranged in the housing 1, and the light attenuation component 4 includes a stacked light-transmitting layer 41, a weak light layer 42 and an attenuation body 43, and the weak light layer 42 is provided with a first through hole 44 corresponding to the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3, and the light-transmitting layer 41 is arranged close to the probe interface 12 relative to the attenuation body 43, so that the near-infrared light emitted by the transmitting probe 2 is transmitted to the receiving probe 3 via the light-transmitting layer 41, the first through hole 44 of the weak light layer 42 and the attenuation body 43 in sequence.

[0036] It should be noted that the object detected by the above-mentioned phantom device is the optical transmission path in the near-infrared brain function imaging device corresponding to the transmitting probe 2 and the receiving probe 3 (it can also be said to be the optical transmission path in the near-infrared brain function imaging device where the transmitting probe 2 and the receiving probe 3 are located). The optical attenuation component 4 is used to attenuate the near-infrared light emitted by the transmitting probe 2, and at the same time, it can allow the attenuated near-infrared light to enter the receiving probe 3. Therefore, the optical attenuation component 4 has an optical path for light attenuation, which can specifically be an optical path that passes through the light-transmitting layer 41, the first through hole 44 of the weak light layer 42, and the attenuation body 43. This is a different path from the optical transmission path in the near-infrared brain function imaging device.

[0037] It can be understood that the distance between the above-mentioned paired probe interfaces 12 can be within a preset distance so that the spacing between the installed transmitting probe 2 and receiving probe 3 is maintained within a certain range. The present application does not specifically limit the value of the above-mentioned preset distance, and it is sufficient to cause optical attenuation of the near-infrared light in the optical path between the paired transmitting probe 2 and receiving probe 3 of the near-infrared brain function imaging device.

[0038] Optionally, the housing 1 may be provided with an identification portion for identifying whether the probe to be plugged into the probe interface 12 is the transmitting probe 2 or the receiving probe 3, and also for identifying the number of the probe interface 12. For example, Figure 3 A shown in the figure represents the probe interface 12 for plugging in the transmitting probe 2, B represents the probe interface 12 for plugging in the receiving probe 3, A11 represents the probe interface 12 numbered 11 for plugging in the transmitting probe 2, and B11 represents the probe interface 12 numbered 11 for plugging in the receiving probe 3, wherein the A11 probe interface 12 and the B11 probe interface 12 are probe interfaces 12 arranged in pairs, the A21 probe interface 12 and the B21 probe interface 12 are probe interfaces 12 arranged in pairs, and so on, which are not given examples one by one here.

[0039] The light attenuation component 4 is used to attenuate the near-infrared light emitted by the transmitting probe 2. The emitted near-infrared light may be absorbed, refracted, scattered, etc. after entering the light attenuation component 4, wherein the scattered near-infrared light is received by the receiving probe 3 to perform near-infrared data collection. The light attenuation component 4 can simulate the light attenuation environment of a real brain, which is similar to human tissue. The material constituting the phantom has scattering and absorption characteristics similar to human tissue. Specifically, it can be made of materials such as POM (polyoxymethylene resin), silicon, and PE (polyethylene).

[0040] By transmitting the near-infrared light emitted by the transmitting probe 2 to the receiving probe 3 through the light-transmitting layer 41, the first through hole 44 of the weak-light layer 42 and the attenuation body 43 in sequence, it is possible to simulate the scattering and absorption characteristics similar to those of human tissue while achieving the purpose of effectively detecting the performance of the optical transmission path corresponding to the paired probes in the near-infrared brain functional imaging device.

[0041] Optionally, the light-transmitting layer 41 is arranged relative to the weak-light layer 42 and the attenuation body 43, close to the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3, and when the transmitting probe 2 and the receiving probe 3 are installed on the phantom device, there is a gap between the light-transmitting layer 41 and the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3, so as to avoid the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3 directly contacting the light-transmitting layer 41, causing damage to the transmitting probe 2 and the receiving probe 3.

[0042] Specifically, the light-transmitting layer 41 and / or the attenuation body 43 may be made of a material having a reduced scattering coefficient substantially the same as that of human tissue, such as POM (polyoxymethylene resin), which has the characteristics of low cost and easy availability. It should be noted that the light-transmitting layer 41 and the attenuation body 43 may be made of the same material or different materials, and this application does not make any specific limitation on this.

[0043] Preferably, the light-transmitting layer 41 is a smooth plate-like structure to facilitate operators to clean and maintain the phantom device.

[0044] The design of the first through hole 44 of the weak light layer 42 can further reduce the amount of near-infrared light entering the attenuation body 43 from the light-transmitting layer 41, so that the near-infrared light can be attenuated with a preset attenuation parameter through the attenuation body 43 with a smaller volume, thereby making the volume of the phantom device smaller and more portable. Specifically, the amount of near-infrared light entering the attenuation body 43 can be adjusted by adjusting the size of the first through hole 44, thereby adjusting the light attenuation intensity. Specifically, the size of the first through hole 44 of the weak light layer 42 is within the preset size range, so that the first through hole 44 can make the attenuation of the paired probes in the light attenuation component 4 closer to the standardized light attenuation, such as the light loss critical value of 60dB in the national standard.

[0045] Specifically, since the first through hole 44 provided on the weak light layer 42 can further reduce the amount of near infrared light entering the attenuation body 43 from the light-transmitting layer 41, the thickness of the weak light layer 42 can be less than the thickness of the attenuation body 43, so that the overall volume of the phantom device can be reduced while meeting the light attenuation intensity requirements of the phantom device. Preferably, the thickness of the weak light layer 42 should be as small as possible while ensuring the structural strength. If the thickness of the weak light layer 42 is large, the weak light effect is strong, which will cause the near infrared light coming out of the attenuation body 43 to be absorbed too much by the weak light layer 42, resulting in the problem that the receiving probe 3 cannot receive the near infrared light.

[0046] Optionally, the attenuation body 43 may be made of one or more of the following materials: LDPE (low-density polyethylene), silicon and POM (polyoxymethylene resin).

[0047] The present application can reduce the amount of emitted near-infrared light entering the attenuation body 43 through the light-transmitting layer 41 and the weak-light layer 42, and reduce the amount of scattered near-infrared light emitted by the receiving probe 3, so that the volume of the phantom device can be reduced, and the attenuation body 43 can be coordinated to make the phantom device portable, so that the phantom device can be flexibly used in different scenarios, that is, the operator can carry the phantom device near the near-infrared brain function imaging device to measure the performance of the optical transmission path in the near-infrared brain function imaging device, and the phantom device has a plurality of probe interfaces 12 arranged in pairs, and the optical attenuation component 4 can cause the near-infrared light on the optical path between the plurality of pairs of transmitting probes 2 and receiving probes 3 to attenuate, thereby realizing the detection of a large number of optical transmission paths at the same time, The detection efficiency is improved, and the light-transmitting layer 41 is not provided with a hole structure, so that external dust and other dirt will directly fall onto the light-transmitting layer 41, and will not fall into the structure below through the light-transmitting layer 41, that is, will not fall onto the weak-light layer 42 and the attenuation body 43. In this way, when cleaning the light attenuation component 4, it is sufficient to directly clean the light-transmitting layer 41, which has the advantages of convenient cleaning and high maintainability, and will not damage the structure below the light-transmitting layer 41, especially, will not damage the weak-light layer 42 that is easily damaged during cleaning. The light attenuation component 4 has high maintainability, can extend the service life of the phantom device, and can reduce the operation steps of cleaning the light attenuation component 4, so that the light attenuation parameters of the phantom device after cleaning can be kept as consistent as possible with those before cleaning, and no recalibration is required, so that the accuracy of subsequent measurement results can be guaranteed.

[0048] In some embodiments, Figure 4 and Figure 5 As shown, the light attenuation component 4 further includes a blocking layer 45 , which is stacked on a side of the light-transmitting layer 41 away from the weak-light layer 42 , and the blocking layer 45 is provided with a second through hole 46 corresponding to the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3 .

[0049] In this way, the blocking layer 45 can block the optical crosstalk between adjacent and different pairs of probes, and at the same time, it can also imitate the effect of the black light-absorbing head cap used to install the probe when the probe is worn on the head, thereby more accurately simulating the optical transmission conditions of the optical transmission path between the pairs of probes in the wearing state, and then more accurately detecting the performance of the optical transmission path in the near-infrared brain function imaging device.

[0050] During use, when the transmitting probe 2 and the receiving probe 3 are installed on the phantom device, the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3 can extend into the second through hole 46 of the barrier layer 45, that is, the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3 are inserted into the second through hole 46 of the barrier layer 45 in a plug-in manner, and the barrier layer 45 will not block the light path between the transmitting probe 2 and the receiving probe 3, and all (or most of) the light is attenuated via the light-transmitting layer 41, the weak light layer 42 and the attenuation body 43.

[0051] Optionally, the thickness of the barrier layer 45 may range from 4 mm to 8 mm, and the barrier layer 45 may be made of one or more of the following materials: POM (polyoxymethylene resin) and epoxy resin. Preferably, the barrier layer 45 is made of an opaque material, such as black POM (polyoxymethylene resin).

[0052] In some preferred embodiments, the light-transmitting layer 41 is made of the same material as the attenuation body 43, that is, the light-transmitting layer 41 not only has a light-transmitting effect but also has a light attenuation effect consistent with the attenuation body 43, that is, the near-infrared light emitted by the transmitting probe 2 can first be subjected to a certain light attenuation through the light-transmitting layer 41, and then be further attenuated through the weak light layer 42 and the attenuation body 43 in sequence. Similarly, the near-infrared light emitted from the attenuation body 43 will be further attenuated by the light-transmitting layer 41 before entering the receiving probe 3. In this way, the volume of the phantom device can be further reduced, making the phantom device more portable.

[0053] In other embodiments, the light-transmitting layer 41 may also be made of other light-transmitting materials, as long as it can achieve a certain light attenuation effect while achieving the light-transmitting effect, and the present application does not make any specific limitation on this.

[0054] In some embodiments, the thickness of the light-transmitting layer 41 can be set to be smaller than the thickness of the blocking layer 45 and / or the attenuation body 43, so as to further increase the light attenuation by occupying a smaller space of the light-transmitting layer 41, thereby ensuring the degree of light attenuation of the near-infrared light through the light attenuation component 4 while reducing the volume of the phantom device. In addition, reducing the thickness of the light-transmitting layer 41 can prevent the near-infrared light from directly entering the receiving probe 3 through reflection and refraction in the light-transmitting layer 41, thereby affecting the detection of the receiving probe 3.

[0055] In some embodiments, the size of the first through hole 44 at the light receiving end of the receiving probe 3 may be the same as or different from the size of the first through hole 44 at the light emitting end of the transmitting probe 2. The present application does not make any specific limitation on this. The appropriate light flux can be adjusted by adjusting the size of the first through hole 44.

[0056] In some embodiments, the size of the first through hole 44 corresponding to the light receiving end of the receiving probe 3 is greater than or equal to the size of the light receiving end of the receiving probe 3 .

[0057] In this way, the light receiving end of the receiving probe 3 can fully receive the near-infrared light emitted from the first through hole 44 of the corresponding receiving probe 3, thereby avoiding the problem that the light receiving end of the local receiving probe 3 may not receive the near-infrared light, thereby avoiding erroneous detection of the performance of the optical transmission path, and thus improving the accuracy of the detection of the performance of the optical transmission path.

[0058] Specifically, when the above-mentioned receiving probe 3 adopts an optical fiber cable to receive light, the optical fiber cable may include multiple optical fibers. If the size of the first through hole 44 corresponding to the light receiving end of the receiving probe 3 is smaller than the size of the light receiving end of the receiving probe 3, some optical fibers will not be able to receive near-infrared light. If this part of the optical fiber happens to be damaged, the near-infrared data collected by the receiving probe 3 will eventually contain errors, or even large errors, resulting in the inability to achieve effective detection.

[0059] In some embodiments, Figure 4 and Figure 5 As shown, a light absorbing layer 5 is provided on a side of the attenuation body 43 away from the weak light layer 42 , and the light absorbing layer 5 is used to absorb the near-infrared light transmitted to the attenuation body 43 .

[0060] In this way, the light absorbing layer 5 can reduce the reflection of the near-infrared light emitted by the transmitting probe 2 on the housing 1 , thereby reducing the interference of the reflection on the near-infrared light received by the receiving probe 3 .

[0061] Optionally, the light absorbing layer 5 can be provided at the bottom of the shell 1. The light absorbing layer 5 can be made of a rough black material or other light absorbing materials. The present application does not make any specific limitation thereto, as long as the light absorption effect can be achieved.

[0062] In some embodiments, the weak light layer 42 is made of polyetheretherketone material; and / or the light-transmitting layer 41 and the attenuation body 43 are made of polyoxymethylene resin or epoxy resin material.

[0063] Optionally, the light-transmitting layer 41 and the attenuating body 43 may be made of the same material or different materials, which is not specifically limited in the present application. For example, the light-transmitting layer 41 and the attenuating body 43 are both made of polyoxymethylene resin, or for another example, the light-transmitting layer 41 is made of polyoxymethylene resin, and the attenuating body 43 is made of epoxy resin.

[0064] In some embodiments, Figure 4 and Figure 5 As shown, the thickness of the light-transmitting layer 41 is smaller than the thickness of the attenuation body 43 .

[0065] In this way, as much near-infrared light as possible can enter the attenuation body 43 through the first through hole 44 of the weak light layer 42 , and can prevent the near-infrared light from directly entering the receiving probe 3 through reflection and refraction in the light-transmitting layer 41 and affecting the detection of the receiving probe 3 .

[0066] In some embodiments, the optical attenuation component 4 is used to cause near-infrared light on the optical path between the paired transmitting probe 2 and receiving probe 3 to attenuate with a preset attenuation parameter, wherein the difference between the preset attenuation parameter and the reference attenuation parameter is within a preset range.

[0067] In this way, the light attenuation component 4 can be used to achieve light attenuation of the near-infrared light in the light path according to a preset attenuation parameter, so that a more accurate detection result can be obtained by using the preset attenuation parameter.

[0068] The above-mentioned reference attenuation parameter can be understood as a standardized light attenuation parameter, such as the light loss critical value of 60dB in the national standard. Specifically, due to manufacturing process, assembly error and other reasons, the individual attenuation degree of the phantom device may deviate, and the preset attenuation parameters between each pair of probe interfaces 12 may also deviate. In order to ensure the accuracy of the phantom device in measuring the performance of the optical transmission path in the near-infrared brain function imaging device, the preset range of the difference between the preset attenuation parameter and the reference attenuation parameter can be 10dB to 20dB, preferably 15dB. Exemplarily, the preset attenuation parameter between the paired probe interfaces 12 is between 45dB and 75dB to ensure the measurement accuracy of the phantom device.

[0069] In some embodiments, Figure 2 As shown, a communication interface 11 is provided on the housing 1 , and the phantom device further comprises a storage module provided in the housing 1 , the storage module stores preset attenuation parameters, and the communication interface 11 is used to output the preset attenuation parameters.

[0070] In this way, the preset attenuation parameters corresponding to each paired probe interface 12 can be stored through the storage module, and the preset attenuation parameters can be directly output through the communication interface 11 when in use, so that a more accurate detection result can be obtained by using the preset attenuation parameters. At the same time, since the phantom device itself stores the preset attenuation parameters, the operator can detect the near-infrared brain function imaging device in any place at any time and anywhere, without the need for coordination with other equipment or carrying additional accessories, regardless of distance, scene, or model of near-infrared brain function imaging device. It is easy to use and portable, and can ensure that the results detected by the phantom device can provide accurate reference for users.

[0071] Optionally, the storage module can store preset attenuation parameters between different pairs of probe interfaces 12. The preset attenuation parameters between different pairs of probe interfaces 12 may be the same or different due to the influence of the optical attenuation component 4. Specifically, before use, the preset attenuation parameters between each pair of probe interfaces 12 can be determined through detection, and the preset attenuation parameters can be stored in the storage module so that they can be used at any time during detection.

[0072] Optionally, the communication interface 11 may be a socket or an insert that complies with a communication protocol, which is not described here. For example, the type of the communication interface 11 may be a Universal Serial Bus (USB) interface, an RS232 interface, a custom serial port, etc., and this application does not make any specific limitations on this.

[0073] In some embodiments, when in use, the phantom device of the present application may be configured with an independent processing device, for example, an independent processor is set inside the phantom device to perform detection, and a more accurate detection result is obtained based on the processor obtaining the preset attenuation parameter and the light intensity value obtained by the receiving probe 3. Another example is to perform detection through a portable electronic device (such as a portable laptop computer) that is connected to the processor for communication.

[0074] In some preferred embodiments, the detection can be performed by a near-infrared brain function imaging device that is connected to the phantom device, that is, the near-infrared brain function imaging device and the phantom device can be connected by wired communication or wireless communication, and the phantom device can send its own stored preset attenuation parameters to the near-infrared brain function imaging device, thereby realizing the detection of the performance of the optical transmission path. This application does not make specific restrictions on this. In this way, when the operator goes to any scene to detect the performance of the optical transmission path in the near-infrared brain function imaging device, he only needs to carry a portable phantom device, and the detection can be completed using the near-infrared brain function imaging device to be detected on site, without carrying other equipment, which is more convenient.

[0075] The above-mentioned near-infrared brain function imaging device includes a processing module, which can obtain the preset attenuation parameters sent by the communication interface 11, and can also obtain near-infrared data (for example, light intensity value) collected via the receiving probe 3. The processing module can analyze the preset attenuation parameters and near-infrared data to calculate the performance of the optical transmission path corresponding to the paired probes of the near-infrared brain function imaging device under standardized light attenuation parameters, so as to achieve accurate measurement of the performance of the optical transmission path in the near-infrared brain function imaging device.

[0076] The processing module may include a processor, which may include a processing device of more than one general-purpose processing device, such as a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), etc. More specifically, the processor may be a complex instruction set computing (CISC) microprocessor, a reduced instruction set computing (RISC) microprocessor, a very long instruction word (VLIW) microprocessor, a processor running other instruction sets, or a processor running a combination of instruction sets. The processor may also be one or more special-purpose processing devices, such as an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a digital signal processor (DSP), a system on a chip (SoC), etc. The processor may be communicatively coupled to a memory and configured to execute computer-executable instructions stored thereon.

[0077] In some embodiments, Figure 2 and Figure 3 As shown, the shell 1 includes a cover plate 13 covering the optical attenuation component 4, and a first guide member 14 is arranged on the cover plate 13. The first guide member 14 is arranged around the probe interface 12, and a partition cavity is formed on the first guide member 14. The cable connected to the transmitting probe 2 or the receiving probe 3 is placed in the partition cavity.

[0078] In this way, the direction of the cable connected to the transmitting probe 2 or the receiving probe 3 can be positioned through the first guide piece 14 on the cover plate 13, so that the probe can be stably plugged into the probe interface 12, and by positioning the direction of the cable, the routing of the cables connected to each probe can be achieved without overlapping, so as to facilitate the induction and arrangement of the cables.

[0079] A plurality of probe interfaces 12 arranged in pairs are arranged in an array. The probe interfaces 12 for installing the transmitting probe 2 form a first interface array, and the probe interfaces 12 for installing the receiving probe 3 form a second interface array. The first interface array and the second interface array are arranged in different areas on the upper surface of the shell 1.

[0080] like Figure 2 and Figure 3 As shown, the orientation of the compartment cavity corresponding to the first interface array is opposite to the orientation of the compartment cavity corresponding to the second interface array. Exemplarily, the orientation of the compartment cavity corresponding to the first interface array is leftward, and the orientation of the compartment cavity corresponding to the second interface array is rightward, so that the cables of the probe installed in the first interface array can be combed on the left side of the housing 1, and the cables of the probe installed in the second interface array can be combed on the right side of the housing 1, so that the cables located at the first interface array and the second interface array can be combed well respectively, preventing the cables from being bent or damaged during the detection process, which affects the detection results of the optical transmission path.

[0081] Optionally, the size of the spacer cavity of the first guide member 14 may be adapted to the size of the cable, so that the spacer cavity can not only stably clamp the cable, but also avoid excessive force on the cable, thereby preventing the cable from being damaged.

[0082] Optionally, the bottom of the partition cavity may be in an arc shape to match the outer contour of the cable.

[0083] In some embodiments, the spacing cavities formed on the first guide members 14 in the same row of the same interface array have the same orientation to ensure that the cables connected to each probe can be well combed, so that the probes connected to the cables can be stably mounted on the cover plate 13, preventing the movement of the cables and probes during the detection process from affecting the accuracy of the detection.

[0084] The first guide member 14 can be formed integrally with the cover plate 13 to ensure the relative position relationship and structural stability of the cover plate 13 and the first guide member 14. Of course, the first guide member 14 can also be a separate component that can be assembled on the cover plate 13. The specific setting relationship between the first guide member 14 and the cover plate 13 is not limited in this application.

[0085] In some embodiments, Figure 2 and Figure 3 As shown, the shell 1 includes a cover plate 13 covering the optical attenuation component 4, and a plurality of second guide members 15 are arranged on the upper surface of the cover plate 13. The plurality of second guide members 15 are located on the outside of a plurality of probe interfaces 12 arranged in pairs, and the second guide members 15 located on the same side are used to cooperate in gathering the cables connected to the transmitting probe 2 and / or the receiving probe 3.

[0086] In this way, the cables connected to the transmitting probe 2 and / or the receiving probe 3 can be further sorted and stored through the second guide member 15, which is convenient for operators to use the phantom device and prevents the cables from being bent or damaged during detection using the phantom device, thereby affecting the detection results of the optical transmission path.

[0087] Optionally, the second guide member 15 may be constructed as an arc-shaped plate, with its arc-shaped surface facing the cable, and the arc-shaped surface of the arc-shaped plate on the same side is used to cooperate with the cable to smoothly and evenly gather the cable to avoid damaging the cable and achieve the purpose of protecting the cable.

[0088] The number of the second guide members 15 located on the same side may be two, and the two second guide members 15 may cooperate to form an eight-shaped structure to constrain the cables between the eight-shaped structures.

[0089] In some embodiments, the phantom device further comprises a top cover buckled on the outside of the cover plate 13 , and escape openings may be opened on opposite sides of the top cover so that the cables gathered by the second guide member 15 can pass through the escape openings.

[0090] Through the cooperation between the first guide member 14, the second guide member 15 and the avoidance opening, the cables can be conveniently, smoothly and smoothly gathered and passed out, reducing the pressure on the cables and thus reducing the risk of cable bending, thereby protecting the cables and extending the service life of the cables, and avoiding bending or damage of the cables, which would affect the detection results of the optical transmission path.

[0091] In some embodiments, Figure 5 As shown, a support pad 6 is provided at the upper opening of the second through hole 46, and a third through hole 61 communicating with the probe interface 12 is provided on the support pad 6. The light-emitting end of the transmitting probe 2 or the light-receiving end of the receiving probe 3 extends into the second through hole 46 via the third through hole 61. The support pad 6 is used to form a gap between the light-emitting end of the transmitting probe 2 or the light-receiving end of the receiving probe 3 and the light-transmitting layer 41.

[0092] In this way, the transmitting probe 2 or the receiving probe 3 can be stably supported by the support pad 6 on the second through hole 46, so that the probe can be stably inserted into the second through hole 46 of the blocking layer 45, and the light-emitting end of the transmitting probe 2 or the light-receiving end of the receiving probe 3 can be prevented from directly contacting the light-transmitting layer 41, thereby protecting the probe end and the light-transmitting layer 41.

[0093] Optionally, the support pad 6 may be configured in a ring shape, and the lower surface of the probe is in direct contact with the ring-shaped support pad 6 to stably support the probe.

[0094] Optionally, the support pad 6 may be made of an elastic material to protect the probe from damage, or may be made of a combination of a hard material and an elastic material, which is not specifically limited in the present application.

[0095] In some embodiments, Figure 5 As shown, the inner wall of the second through hole 46 may be provided with an elastic bushing 7 , and the elastic bushing 7 is sleeved outside the light-emitting end of the transmitting probe 2 or the light-receiving end of the receiving probe 3 .

[0096] In this way, by sleeved on the outer side of the end of the probe, the problem of wear caused by the end of the probe contacting with sharp right angles and other structures during the insertion process can be avoided, thereby achieving the purpose of fully protecting the end of the probe. In some embodiments, the elastic bushing 7 can be made of elastic material, such as rubber, elastic resin, etc.

[0097] In some embodiments, the support pad 6 and the elastic bushing 7 may be integrally formed to ensure that the support pad 6 and the elastic bushing 7 can be stably placed at the probe interface 12 and have a simple structure.

[0098] In some embodiments, the preset attenuation parameters include at least one of the light attenuation parameters of each pair of probe interfaces 12 in the phantom device and the deviation of the light attenuation parameters of each pair of probe interfaces 12 from the reference attenuation parameters, wherein the preset attenuation parameters are used to correct the measurement results of the phantom device.

[0099] Specifically, the measurement result of the phantom device can be converted into the measurement result under the reference attenuation parameter according to the preset attenuation parameter to obtain a more accurate measurement result. For example, A11 and B11 are a pair of probe interfaces 12, and the optical attenuation parameter of the pair of probe interfaces 12 is 56dB. After the phantom device is used to measure the optical transmission path corresponding to the pair of probes installed on A11 and B11, the measurement result based on the optical attenuation parameter of 56dB can be converted into the measurement result under the reference attenuation parameter of 60dB, so that the user can judge the performance of the optical transmission path according to the more accurate measurement result.

[0100] In this way, the measurement results of the phantom device can be corrected by presetting the attenuation parameters, which can avoid the problem of errors in the test results of the optical transmission channel of the near-infrared brain function imaging equipment due to individual differences in the test phantom device such as different physical detection environments or different equipment models, factory batches, manufacturing processes, assembly processes, etc.

[0101] In addition, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present application with equivalent elements, modifications, omissions, combinations (e.g., schemes that cross various embodiments), adaptations or changes. The elements in the claims will be interpreted broadly based on the language used in the claims, and are not limited to the examples described in this specification or during the practice of the present application, and the examples will be interpreted as non-exclusive.

[0102] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more schemes thereof) may be used in combination with each other. For example, a person of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features may be grouped together to simplify the present application. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present application may be less than all the features of a particular disclosed embodiment. Thus, the claims are incorporated herein as examples or embodiments in the specific embodiments, wherein each claim is independently a separate embodiment, and it is considered that these embodiments may be combined with each other in various combinations or arrangements. The scope of the present application should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0103] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A phantom device for measuring the performance of an optical transmission path in a near-infrared brain function imaging device, characterized in that: The optical transmission path is used to characterize the transmission path of the near-infrared light used when the near-infrared brain function imaging device is in working state. The phantom device is portable and includes: A housing, on which a plurality of probe interfaces arranged in pairs are provided, wherein the probe interfaces arranged in pairs are used to plug in a pair of transmitting probes and receiving probes in the near-infrared brain function imaging device; An optical attenuation component is used to make the near-infrared light on the optical path between the paired transmitting probe and receiving probe attenuate with a preset attenuation parameter. The optical attenuation component is arranged in the housing. The optical attenuation component includes a light-transmitting layer, a weak-light layer and an attenuation body arranged in layers. The weak-light layer is provided with a first through hole corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe. The light-transmitting layer is arranged close to the probe interface relative to the attenuation body, so that the near-infrared light emitted by the transmitting probe is transmitted to the receiving probe via the light-transmitting layer, the first through hole of the weak-light layer and the attenuation body in sequence, wherein: The preset attenuation parameters include at least one of the light attenuation parameters of each pair of probe interfaces in the phantom device and the deviation of the light attenuation parameters of each pair of probe interfaces from the reference attenuation parameters, and the preset attenuation parameters are used to correct the measurement results of the phantom device; The shell is provided with a communication interface. The phantom device further comprises a storage module arranged in the shell. The storage module stores the preset attenuation parameters. The communication interface is used to output the preset attenuation parameters.

2. The phantom device according to claim 1, characterized in that: The light attenuation component further comprises a blocking layer, which is stacked on a side of the light-transmitting layer away from the weak-light layer, and the blocking layer is provided with a second through hole corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe.

3. The phantom device according to claim 1, characterized in that: The size of the first through hole corresponding to the light receiving end of the receiving probe is greater than or equal to the size of the light receiving end of the receiving probe.

4. The phantom device according to claim 1, characterized in that: A light absorbing layer is arranged on a side of the attenuation body away from the weak light layer, and the light absorbing layer is used for absorbing the near infrared light transmitted to the attenuation body.

5. The phantom device according to claim 1, characterized in that: The low-light layer is made of polyetheretherketone material; and / or, The light-transmitting layer and the attenuation body are made of polyoxymethylene resin or epoxy resin material.

6. The phantom device according to claim 1, characterized in that: The thickness of the light-transmitting layer is smaller than the thickness of the attenuation body.

7. The phantom device according to claim 1, characterized in that: The difference between the preset attenuation parameter and the reference attenuation parameter is within a preset range.

8. The phantom device according to any one of claims 1 to 6, characterized in that: The shell includes a cover plate covering the optical attenuation component, a first guide is arranged on the cover plate, the first guide is arranged around the probe interface, and a partition cavity is formed on the first guide, and a cable connected to the transmitting probe or the receiving probe is placed in the partition cavity.

9. The phantom device according to any one of claims 1 to 6, characterized in that: The shell includes a cover plate covering the optical attenuation component, and a plurality of second guide members are arranged on the upper surface of the cover plate. The plurality of second guide members are located on the outside of the plurality of probe interfaces arranged in pairs, and the second guide members located on the same side are used to cooperate in gathering the cables connected to the transmitting probe and / or the receiving probe.

10. The phantom device according to claim 2, characterized in that: A support pad is provided at the upper opening of the second through hole, and a third through hole communicating with the probe interface is provided on the support pad. The light-emitting end of the transmitting probe or the light-receiving end of the receiving probe extends into the second through hole through the third through hole, and the support pad is used to form a gap between the light-emitting end of the transmitting probe or the light-receiving end of the receiving probe and the light-transmitting layer.

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