Phantom device for measuring the performance of optical transmission path in near-infrared brain functional imaging equipment and method for measuring using the phantom device

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 and a method for measuring using the phantom device, which relates to the technical field of measuring the performance of an optical transmission path. The phantom device is portable, and includes a housing, an optical attenuation component, and a storage module. The housing is provided with a communication interface and a plurality of probe interfaces arranged in pairs. The optical attenuation component is used to cause the near-infrared light on the optical path between the paired transmitting probe and the receiving probe to undergo optical attenuation with a preset attenuation parameter. The storage module stores the preset attenuation parameter. The above structure enables the phantom device to 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 arranged in pairs to detect multiple optical transmission paths.

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 performance of an optical transmission path in a near-infrared brain function imaging device and a method for measuring using the phantom 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, component replacement, etc. 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, which is not convenient to carry and operate. In addition, with the development of high detection channel technology of near-infrared brain function imaging equipment, the increase in the number of optical transmission paths has also increased the workload of evaluating the performance of the optical transmission paths. At present, the test phantom device can only detect one or a few optical transmission paths at a time, and the efficiency of detection also needs to be improved.

[0004] In addition, the light attenuation of the test phantom devices varies due to their different models, manufacturers, production batches, and manufacturing processes. Even the same test phantom device may have manufacturing deviations in its individual attenuation due to manufacturing processes, assembly errors, and other reasons. In this case, the performance of each optical transmission path directly obtained cannot provide an accurate reference for users. Summary of the invention

[0005] 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 an optical transmission path in a near-infrared brain functional imaging device and a method for measuring using the phantom device. The phantom device is portable and can detect the performance of optical transmission paths corresponding to multiple pairs of probes through multiple paired probe interfaces, thereby improving detection efficiency.

[0006] 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. The phantom device is portable and includes: a shell, on which a communication interface and a plurality of probe interfaces arranged in pairs are provided, and the probe interfaces arranged in pairs are used to plug in a pair of transmitting probes and a receiving probe in the near-infrared brain function imaging device; an optical attenuation component is arranged in the shell and includes a stacked filter layer and an attenuation body, the optical attenuation component is arranged corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe, so that the near-infrared light emitted by the transmitting probe is transmitted to the receiving probe via the filter layer and the attenuation body in sequence, and the optical attenuation component is used to cause the near-infrared light on the optical path between the paired transmitting probe and the receiving probe to be optically attenuated with a preset attenuation parameter, wherein the difference between the preset attenuation parameter and the reference attenuation parameter is within a preset range; a storage module, which is arranged in the shell, the storage module stores the preset attenuation parameter, and the communication interface is used to output the preset attenuation parameter.

[0007] In some embodiments, the optical attenuation component also includes a blocking layer, which is arranged close to the probe interface relative to the attenuation body, and the blocking layer is provided with mounting holes corresponding to the probe interface, and the mounting holes are used to allow the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe to extend into the blocking layer.

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

[0009] In some embodiments, the multiple probe interfaces arranged in pairs are arranged in an array, the probe interfaces used to install the transmitting probes form a first interface array, and the probe interfaces used to install the receiving probes form a second interface array, and the first interface array and the second interface array are arranged in different areas on the upper surface of the shell.

[0010] In some embodiments, the probe interfaces respectively located in the same row and column in the first interface array and the second interface array are used to plug in a pair of transmitting probes and receiving probes.

[0011] In some embodiments, the shell includes a cover plate covering the optical attenuation component, a first guide member is formed 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.

[0012] In some embodiments, 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 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 the receiving probe.

[0013] In some embodiments, the blocking layer is provided with a mounting hole corresponding to the probe interface, a support pad is provided at the upper opening of the mounting hole, the support pad is provided with a first through hole communicating with the probe interface, the light emitting end of the transmitting probe or the light receiving end of the receiving probe extends into the mounting hole via the first 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 filter layer.

[0014] In some embodiments, an inner wall of the mounting hole is provided with an elastic bushing, and the elastic bushing is sleeved outside the light-emitting end of the transmitting probe or the light-receiving end of the receiving probe.

[0015] 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.

[0016] An embodiment of the present application also provides a method for measuring the performance of an optical transmission path in a near-infrared brain function imaging device using the above-mentioned phantom device, the method comprising: in response to a first operation, the near-infrared brain function imaging device receives the preset attenuation parameter via the communication interface of the phantom device to which it is communicatively connected.

[0017] In some embodiments, the method further includes: measuring the optical transmission path performance of the optical paths corresponding to different pairs of the transmitting probe and the receiving probe at different times; or, measuring the optical transmission path performance of the optical paths corresponding to multiple pairs of the transmitting probe and the receiving probe at the same time; wherein the spacing between adjacent pairs of the transmitting probe and the receiving probe is within a preset spacing range.

[0018] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows: the filter layer of the present application can reduce the amount of emitted near-infrared light entering the attenuation body, and reduce the amount of scattered near-infrared light obtained by the receiving probe. The design of the filter layer and the attenuation body can further reduce the volume of the phantom device, so that the phantom device can be portable, and 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. In addition, the phantom device has a plurality of probe interfaces arranged in pairs, and the optical attenuation component can emit near-infrared light on the optical path between the plurality of pairs of transmitting probes and receiving probes at preset attenuation parameters. The light attenuation is generated, thereby realizing the detection of a larger number of light transmission paths, thereby improving the detection efficiency, and the storage module stores the preset attenuation parameters corresponding to each paired probe interface, which can be directly output through the communication interface when in use, so that the preset attenuation parameters can be used to obtain more accurate detection results. At the same time, since the phantom device itself stores the preset attenuation parameters, the operator can detect the near-infrared brain function imaging equipment 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 equipment, etc. It is easy to use and portable, and can ensure that the results detected by the phantom device can provide accurate reference for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] 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;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the phantom device according to an embodiment of the present application;

[0022] Figure 3 This is a front view of the phantom device according to an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the internal structure of the phantom device according to an embodiment of the present application;

[0024] Figure 5This is a simplified diagram of the internal structure of the phantom device according to the embodiment of the present application;

[0025] Figure 6 The present invention is a flow chart of a method for measuring the performance of an optical transmission path in a near-infrared brain function imaging device using the above-mentioned phantom device.

[0026] The components indicated by the reference numerals in the figures are:

[0027] 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. Blocking layer; 42. Filter layer; 43. Attenuation body; 44. Mounting hole; 5. Light absorbing layer; 6. Support pad; 61. First through hole; 7. Elastic bushing. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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. First, the optical transmission path in the near-infrared brain function imaging device in the present application is introduced. The optical transmission path 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 is specifically the components related to optical transmission of the near-infrared brain function imaging device in the whole machine state. It can be understood that the whole machine 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.

[0034] 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.

[0035] 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 1 As 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.

[0036] like Figures 2 to 4 As shown, the phantom device is portable, and the phantom device includes a housing 1, an optical attenuation component 4, and a storage module. The housing 1 is provided with a communication interface 11 and 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 the receiving probe 3 in the near-infrared brain functional imaging device. The optical attenuation component 4 is arranged in the housing 1 and includes a filter layer 42 and an attenuation body 43 arranged in layers. The optical attenuation component 4 is arranged corresponding to the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3, so that the near-infrared light emitted by the transmitting probe 2 is transmitted to the receiving probe 3 via the filter layer 42 and the attenuation body 43 in sequence. The optical attenuation component 4 is used to make the near-infrared light on the optical path between the paired transmitting probe 2 and the receiving probe 3 attenuate with a preset attenuation parameter, wherein the difference between the preset attenuation parameter and the reference attenuation parameter is within a preset range. The storage module is arranged in the housing 1, and the storage module stores the preset attenuation parameter, and the communication interface 11 is used to output the preset attenuation parameter.

[0037] 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, specifically, the optical path attenuated by the filter layer 42 and the attenuation body 43, which is different from the optical transmission path in the near-infrared brain function imaging device.

[0038] Optionally, the housing 1 of the phantom device may be provided with a handheld structure, which may be arranged on a side surface of the housing 1. The operator may conveniently carry the portable phantom device through the handheld structure, so that the portable phantom device may be carried by the operator to the vicinity of the near-infrared brain function imaging device for measurement. In addition, the phantom device may have the advantages of small size and light weight, so as to facilitate the portability of the phantom device.

[0039] 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 the 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 enable the near-infrared light in the optical path between the paired transmitting probe 2 and the receiving probe 3 to attenuate with a preset attenuation parameter.

[0040] 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.

[0041] The light attenuation component 4 is used to attenuate the near-infrared light emitted by the transmitting probe 2. The emitted near-infrared light enters the light attenuation component 4 and is absorbed, refracted, and scattered. The scattered near-infrared light is received by the receiving probe 3 to collect near-infrared data. 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).

[0042] By transmitting the near-infrared light emitted by the transmitting probe 2 to the receiving probe 3 through the filter 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, thereby achieving the purpose of effectively detecting the performance of the optical transmission path corresponding to the paired probes in the near-infrared brain function imaging device.

[0043] Optionally, the filter layer 42 is used to increase the light attenuation degree on the light path, so that the attenuation of the paired probes in the light attenuation component 4 is closer to the standardized light attenuation, such as the light loss critical value of 60dB in the national standard. At the same time, the filter layer 42 can reduce the amount of light entering the attenuation body 43 by the emitted near-infrared light, and reduce the amount of light emitted by the scattered near-infrared light received by the receiving probe 3, so that the volume of the phantom device can be further reduced, making the phantom device more portable.

[0044] Optionally, the filter layer 42 may be formed in one or more of the following ways, such as an optical neutral density filter, a PET glass shading film, a material layer with an absorption coating coated on a black film, etc. The present application does not make any specific limitation on this, and it only needs to increase the degree of light attenuation in the light path and be thin and light.

[0045] 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).

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In some preferred embodiments, the detection can be performed by a near-infrared brain function imaging device that is connected to the phantom device in communication, that is, the near-infrared brain function imaging device and the phantom device can be connected by wired communication or wireless communication, so as to realize the detection of the performance of the optical transmission path, and 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 by using the near-infrared brain function imaging device to be detected on site, without carrying other equipment, which is more convenient.

[0051] 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 where the paired probes of the near-infrared brain function imaging device are located 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.

[0052] The filter layer 42 of the present application can reduce the amount of emitted near-infrared light entering the attenuation body 43, and reduce the amount of scattered near-infrared light obtained by the receiving probe 3. The design of the filter layer 42 and the attenuation body 43 can further reduce the volume of the phantom device, so that the phantom device can be portable, and 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. In addition, 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 be optically attenuated with preset attenuation parameters. In this way, it is possible to detect a larger number of optical transmission paths, thereby improving the detection efficiency. In addition, the storage module stores the preset attenuation parameters corresponding to each paired probe interface 12, 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, without the need for coordination with other equipment or carrying additional accessories, regardless of distance, scene, or model of the 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.

[0053] In some embodiments, Figure 4 and Figure 5 As shown, the optical attenuation component 4 also includes a blocking layer 41, which is arranged near the probe interface 12 relative to the attenuation body 43. The blocking layer 41 is provided with a mounting hole 44 corresponding to the probe interface 12, and the mounting hole 44 is used to allow the light-emitting end of the transmitting probe 2 and the light-receiving end of the receiving probe 3 to extend into the blocking layer 41.

[0054] In this way, the blocking layer 41 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 of the optical 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.

[0055] The light emitting end of the transmitting probe 2 and the light receiving end of the receiving probe 3 can be extended into the blocking layer 41, which can be understood as the light emitting end of the transmitting probe 2 and the light receiving end of the receiving probe 3 are inserted into the blocking layer 41 in a plug-in manner, and the blocking layer 41 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 filter layer 42 and the attenuation body 43.

[0056] Optionally, the thickness of the barrier layer 41 may range from 4 mm to 8 mm, and the barrier layer 41 may be made of one or more of the following materials: POM (polyoxymethylene resin) and epoxy resin.

[0057] In some embodiments, the thickness of the filter layer 42 may be smaller than the thickness of the blocking layer 41 and the attenuation body 43, so as to increase the light attenuation by the filter layer 42 which occupies a smaller space, and ensure the degree of light attenuation of the near-infrared light through the light attenuation component 4 while reducing the volume of the phantom device. Preferably, the thickness of the filter layer 42 should be smaller to prevent the near-infrared light from being absorbed too much, and to prevent a large amount of near-infrared light from being reflected, refracted, etc. in the filter layer 42, and not entering the attenuation body 43 but being directly acquired by the receiving probe 3, thereby affecting the measurement of the receiving probe 3. It should be noted that the filter layer 42 may be an integrally formed sheet, or may be composed of a plurality of components with a filtering function, which is not specifically limited in the present application. Preferably, in order to make the structure of the phantom device simple, the light attenuation capability stable and easy to maintain, the filter layer 42 may be designed as an integrally formed sheet.

[0058] 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 filter layer 42 , and the light absorbing layer 5 is used to absorb the near-infrared light transmitted to the light absorbing layer 5 .

[0059] 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 .

[0060] 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.

[0061] In some embodiments, Figure 2 and Figure 3 As shown, a plurality of probe interfaces 12 arranged in pairs are arranged in an array. The probe interfaces 12 used to install the transmitting probe 2 form a first interface array, and the probe interfaces 12 used to install 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.

[0062] In this way, the distance between the paired transmitting probe 2 and the receiving probe 3 can be ensured to avoid optical crosstalk between different paired probes, and the partitioned arrangement of the first interface array and the second interface array makes it easy for operators to distinguish and use them, which brings convenience to the operation. In addition, it is also easy to comb the cables connected to the probes.

[0063] For example, Figure 2 and Figure 3 As shown, the probe interfaces 12 for installing the transmitting probe 2 can adopt a 3×4 array, that is, there are 3 probe interfaces 12 in the horizontal row and 4 probe interfaces 12 in the vertical row, thereby reasonably arranging the 12 probe interfaces 12 for installing the transmitting probe 2.

[0064] In some embodiments, Figure 2 and Figure 3 As shown, the probe interfaces 12 located in the same row and column in the first interface array and the second interface array are used to plug in the paired transmitting probe 2 and receiving probe 3 .

[0065] In this way, it can be ensured that the transmitting probe 2 and the receiving probe 3 in the paired probes can be kept within a preset spacing range, so that in the light attenuation component 4 of the same size, the near-infrared light emitted by each transmitting probe 2 can be evenly and sufficiently attenuated.

[0066] For example, Figure 2 and Figure 3 As shown, the probe interface 12 located in the first row and the first column in the first interface array shown in the figure is A11, and the probe interface 12 located in the first row and the first column in the second interface array is B11. The A11 probe interface 12 and the B11 probe interface 12 are paired probe interfaces 12 for plugging in paired transmitting probes 2 and receiving probes 3.

[0067] 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 formed 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.

[0068] 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.

[0069] like Figure 2 and Figure 3As 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.

[0070] 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.

[0071] Optionally, the bottom of the partition cavity may be in an arc shape to match the outer contour of the cable.

[0072] 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.

[0073] The first guide member 14 may be formed integrally with the cover plate 13 to ensure the relative position relationship and structural stability between the cover plate 13 and the first guide member 14 .

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] In some embodiments, Figure 4 and Figure 5 As shown, a support pad 6 is provided at the upper opening of the mounting hole 44, and a first through hole 61 is provided on the support pad 6 to communicate with the probe interface 12. The light-emitting end of the transmitting probe 2 or the light-receiving end of the receiving probe 3 extends into the mounting hole 44 through the first 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 filter layer 42.

[0081] In this way, the transmitting probe 2 or the receiving probe 3 can be stably supported by the support pad 6 on the mounting hole 44, so that the probe can be stably inserted into the mounting hole 44 of the blocking layer 41, 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 filter layer 42, thereby protecting the probe end and the filter layer 42.

[0082] 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.

[0083] 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.

[0084] In some embodiments, Figure 5 As shown, the barrier layer 41 is provided with a mounting hole 44 corresponding to the probe interface 12 , and the inner wall of the mounting hole 44 is provided with an elastic bushing 7 , which is sleeved outside the light-emitting end of the transmitting probe 2 or the light-receiving end of the receiving probe 3 .

[0085] In this way, by sleeved the elastic bushing 7 on the outside of the end of the probe, the problem of the end of the probe being worn due to contact with sharp right-angle structures during the insertion process can be avoided, thereby achieving the purpose of fully protecting the end of the probe.

[0086] Optionally, the elastic bushing 7 may be made of an elastic material, such as rubber, elastic resin, etc., or may be made of a combination of a hard material and an elastic material. For example, the edge of the elastic bushing 7 may be supported by a hard material that can be polished to form a rounded corner.

[0087] Optionally, the elastic bushing 7 may be installed in the mounting hole 44 by interference fitting.

[0088] 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.

[0089] Optionally, the axis of the hole on the elastic bushing 7, the axis of the mounting hole 44 and the axis of the hole on the support pad 6 can be set.

[0090] In some embodiments, the preset attenuation parameters include at least one of the optical attenuation parameters of each pair of probe interfaces 12 in the phantom device and the deviation of the optical 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. Specifically, the measurement results of the phantom device can be converted into measurement results under the reference attenuation parameters according to the preset attenuation parameters to obtain more accurate measurement results. 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 optical transmission path corresponding to the pair of probes installed on A11 and B11 is measured using the phantom device, 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.

[0091] 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.

[0092] The present application also provides a method for measuring the performance of an optical transmission path in a near-infrared brain function imaging device using the above-mentioned phantom device. Figure 6 As shown, the method includes step S101.

[0093] Step S101: In response to a first operation, the near-infrared brain function imaging device receives a preset attenuation parameter via the communication interface 11 of the phantom device to which it is communicatively connected.

[0094] In some embodiments, the near-infrared brain function imaging device includes a processing module, which can obtain preset attenuation parameters sent by the communication interface 11 in response to the first operation, and can also obtain near-infrared data collected by 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 where the paired probes of the near-infrared brain function imaging device are located under standardized optical attenuation parameters, so as to achieve accurate measurement of the performance of the optical transmission path in the near-infrared brain function imaging device.

[0095] In this way, for each near-infrared brain function imaging device, at different life stages, a phantom device can be used to obtain corrected light intensity related parameters corresponding to standardized light attenuation parameters, thereby evaluating whether the performance of the optical transmission path between the pair of probes of the near-infrared brain function imaging device currently being tested meets the requirements.

[0096] The above method can achieve the goal of not needing to equip the phantom device with additional equipment. The analysis and presentation of the test results can be directly realized on the near-infrared brain function imaging device currently being tested, so that the operator no longer needs to carry other equipment or introduce an independent and complex operating system. The operator can travel light and more conveniently test near-infrared devices in any scene and distance. It is simple and convenient, and there is no need to carry other equipment.

[0097] Furthermore, the filter layer 42 of the present application can reduce the amount of the emitted near-infrared light entering the attenuation body 43, 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 further reduced, so that the phantom device can be portable, and 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. In addition, 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 be optically attenuated with a preset attenuation parameter, thereby achieving Now, a larger number of optical transmission paths are detected, which improves the detection efficiency. In addition, the storage module stores the preset attenuation parameters corresponding to each paired probe interface 12. When in use, the preset attenuation parameters can be directly output through the communication interface 11, 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 has 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 the 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.

[0098] In some embodiments, the method further comprises: measuring the performance of the optical transmission paths corresponding to different pairs of the transmitting probe 2 and the receiving probe 3 at different times.

[0099] In this way, by detecting different pairs of transmitting probes 2 and receiving probes 3 at different times, the problem of optical crosstalk between paired probes can be prevented from occurring.

[0100] Exemplarily, at the first moment, the transmitting probe 2 corresponding to the A11 probe interface 12 is controlled to work, and the receiving probe 3 corresponding to the B11 probe interface 12 receives the attenuated near-infrared light, so as to detect the performance of the optical transmission path in the near-infrared brain function imaging device corresponding to the pair of transmitting probes 2 and receiving probes 3. Then, at the second moment, the near-infrared brain function imaging device can control the transmitting probe 2 corresponding to the A21 probe interface 12 to work, and the receiving probe 3 corresponding to the B21 probe interface 12 to receive the attenuated near-infrared light, so as to detect the performance of the optical transmission path in the near-infrared brain function imaging device corresponding to the pair of transmitting probes 2 and receiving probes 3, and so on, to complete the measurement of the performance of all optical transmission paths in the near-infrared brain function imaging device.

[0101] In some other embodiments, the method also includes: measuring the performance of optical transmission paths corresponding to multiple pairs of transmitting probes 2 and receiving probes 3 at the same time; wherein the spacing between adjacent pairs of transmitting probes 2 and receiving probes 3 in the multiple pairs is within a preset spacing range, wherein optical crosstalk will not occur in the optical transmission paths between the pairs of transmitting probes 2 and receiving probes 3 within the preset spacing range.

[0102] In this way, the optical transmission paths corresponding to multiple pairs of transmitting probes 2 and receiving probes 3 can be detected at the same time, and the spacing between adjacent pairs of transmitting probes 2 and receiving probes 3 in the multiple pairs is within a preset spacing range. The problem of optical crosstalk between paired probes can be effectively prevented by limiting the distance, and detecting multiple optical transmission paths at the same time can improve detection efficiency and reduce detection time.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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 phantom device is portable and comprises: A housing, on which a communication interface and 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 disposed in the housing and includes a stacked filter layer and an attenuation body. The optical attenuation component is disposed corresponding to the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe, so that the near-infrared light emitted by the transmitting probe is transmitted to the receiving probe via the filter layer and the attenuation body in sequence. The optical attenuation component is used to cause the near-infrared light on the optical path between the paired transmitting probe and the receiving probe to be optically attenuated with a preset attenuation parameter, wherein the difference between the preset attenuation parameter and the reference attenuation parameter is within a preset range; A storage module is disposed in the housing, wherein the storage module stores the preset attenuation parameter, and the communication interface is used to output the preset attenuation parameter.

2. The phantom device according to claim 1, characterized in that: The optical attenuation component also includes a blocking layer, which is arranged close to the probe interface relative to the attenuation body. The blocking layer is provided with mounting holes corresponding to the probe interface, and the mounting holes are used to allow the light-emitting end of the transmitting probe and the light-receiving end of the receiving probe to extend into the blocking layer.

3. 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 light filtering layer, and the light absorbing layer is used for absorbing the near infrared light transmitted to the light absorbing layer.

4. The phantom device according to claim 1, characterized in that: The multiple probe interfaces arranged in pairs are arranged in an array. The probe interfaces used to install the transmitting probes form a first interface array, and the probe interfaces used to install the receiving probes 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.

5. The phantom device according to claim 4, characterized in that: The probe interfaces respectively located in the same row and column in the first interface array and the second interface array are used for plugging in a pair of transmitting probes and receiving probes.

6. The phantom device according to any one of claims 1 to 5, characterized in that: The shell includes a cover plate covering the optical attenuation component, a first guide member is formed 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.

7. The phantom device according to any one of claims 1 to 5, 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 the receiving probe.

8. The phantom device according to claim 2, characterized in that: The blocking layer is provided with a mounting hole corresponding to the probe interface, a support pad is provided at the upper opening of the mounting hole, the support pad is provided with a first through hole communicating with the probe interface, the light emitting end of the transmitting probe or the light receiving end of the receiving probe extends into the mounting hole via the first 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 filter layer.

9. The phantom device according to claim 2, characterized in that: An elastic bushing is arranged on the inner wall of the mounting hole, and the elastic bushing is sleeved outside the light-emitting end of the transmitting probe or the light-receiving end of the receiving probe.

10. The phantom device according to any one of claims 1 to 5, characterized in that: 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 deviations of the light attenuation parameters of each pair of probe interfaces from the reference attenuation parameters, wherein the preset attenuation parameters are used to correct the measurement results of the phantom device.

11. A method for measuring the performance of an optical transmission path in a near-infrared brain function imaging device using a phantom device as claimed in any one of claims 1 to 10, characterized in that: include: In response to the first operation, the near-infrared brain function imaging device receives the preset attenuation parameter via the communication interface of the phantom device to which it is communicatively connected.

12. The method according to claim 11, characterized in that The method further comprises: Measuring the performance of the optical transmission paths corresponding to different pairs of the transmitting probe and the receiving probe at different times; or, The performance of the optical transmission paths corresponding to the plurality of pairs of transmitting probes and receiving probes is measured at the same time; wherein the spacing between the plurality of adjacent pairs of transmitting probes and receiving probes is within a preset spacing range.

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