A method for determining the calibration light intensity range used when repairing the optical transmission path of fNIRS equipment using a phantom

Abstract

The present application provides a method for determining a calibration light intensity range used when a phantom inspects an optical transmission path of an fNIRS device, which relates to the detection technology field of near-infrared brain functional imaging devices. The method comprises: for probe groups in multiple fNIRS devices under the same target type, using a transmitting probe and a receiving probe in each probe group, obtaining first attenuated light intensity data of an outgoing light emitted from a test phantom after the incident light emitted enters the detection environment of the test phantom; based on the first attenuated light intensity data and the first light attenuation parameter respectively corresponding to each probe group under the detection environment of the test phantom, obtaining second attenuated light intensity data; based on the second attenuated light intensity data, determining a calibration light intensity range corresponding to the optical transmission path in the fNIRS device under the target type, so as to inspect the optical transmission path in the fNIRS device under the target type based on the calibration light intensity range, the inspection phantom used during the inspection and its corresponding second light attenuation parameter.

Description

Technical Field

[0001] The present application relates to the technical field of detection of near-infrared brain function imaging equipment, and in particular to a method for determining a calibrated light intensity range used when repairing an optical transmission path of an fNIRS device using a phantom. Background Art

[0002] fNIRS devices detect brain activity by emitting near-infrared light into the brain and receiving near-infrared light emitted from the brain. Therefore, the performance of the optical transmission pathway used to emit and receive light in the fNIRS device will greatly affect the detection results.

[0003] When inspecting the optical transmission path in the fNIRS device, it is necessary to compare the measured attenuated light intensity data with the rated parameters to obtain the inspection results. If the rated parameters are not accurate enough, it will cause the maintenance personnel to misjudge the inspection results. For example, when using the rated parameters to inspect the equipment, it is often necessary to ensure that the inspection environment is consistent with the environment when setting the rated parameters. In order to ensure the accuracy of the inspection results, it is usually necessary to set different rated parameters for different inspection environments. The inspection environment of the inspection equipment used when inspecting the optical transmission paths in different fNIRS devices may be different. If the corresponding light intensity range is set for different inspection environments, it will take a lot of manpower.

[0004] Therefore, how to determine the calibration light intensity range used when inspecting the optical transmission path of the fNIRS device has become a key issue affecting the accuracy of the optical transmission path inspection results. Summary of the invention

[0005] In response to the above-mentioned technical problems existing in the prior art, the present application provides a method for determining the calibrated light intensity range used when a phantom is used to inspect the optical transmission path of an fNIRS device, which can accurately determine the calibrated light intensity range used when a phantom is used to inspect the optical transmission path of an fNIRS device, thereby improving the accuracy of the inspection results.

[0006] According to a first scheme of the present application, a method for determining a calibrated light intensity range used when a phantom inspects an optical transmission path of an fNIRS device is provided. The fNIRS device includes at least one probe group, wherein each probe group includes a transmitting probe for transmitting near-infrared light to an object and a receiving probe for acquiring near-infrared light from the object. The method includes: for probe groups in multiple fNIRS devices under the same target type, using the transmitting probe and the receiving probe in each probe group, obtaining first attenuated light intensity data of output light emitted from the test phantom after the emitted incident light enters the detection environment of the test phantom; obtaining second attenuated light intensity data based on the first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and the first light attenuation parameter corresponding to the test phantom; determining a calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type based on the second attenuated light intensity data, so as to inspect the optical transmission path in the fNIRS device under the target type based on the calibrated light intensity range, the inspection phantom used during the inspection and the second light attenuation parameter corresponding thereto.

[0007] According to a second scheme of the present application, a method for repairing an optical transmission path in an fNIRS device using a phantom is provided, the method comprising: using a calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type determined by the first scheme, repairing the optical transmission path in the fNIRS device under the target type.

[0008] According to the third scheme of the present application, a device for determining the calibrated light intensity range used when a phantom inspects an optical transmission path of an fNIRS device is provided, wherein the fNIRS device includes at least one probe group, wherein each probe group includes a transmitting probe for transmitting near-infrared light to an object and a receiving probe for acquiring near-infrared light from the object, and the device includes an acquisition module and a determination module. The acquisition module is configured to obtain, for probe groups in multiple fNIRS devices under the same target type, first attenuated light intensity data of the outgoing light emitted from the test phantom after the emitted incident light enters the detection environment of the test phantom using the transmitting probe and the receiving probe in each probe group. The determination module is configured to obtain second attenuated light intensity data based on first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and a first light attenuation parameter corresponding to the test phantom; and determine a calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type based on the second attenuated light intensity data, so as to inspect the optical transmission path in the fNIRS device under the target type based on the calibrated light intensity range, the inspection phantom used during inspection and its corresponding second light attenuation parameter.

[0009] According to a fourth scheme of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processing device, the following steps are performed: for probe groups in multiple fNIRS devices under the same target type, using a transmitting probe and a receiving probe in each probe group, obtaining first attenuated light intensity data of an outgoing light emitted from a test phantom after the emitted incident light enters a detection environment of the test phantom; obtaining second attenuated light intensity data based on the first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and a first light attenuation parameter corresponding to the test phantom; determining a calibrated light intensity range corresponding to an optical transmission path in the fNIRS device under the target type based on the second attenuated light intensity data, so as to inspect the optical transmission path in the fNIRS device under the target type based on the calibrated light intensity range, a maintenance phantom used during maintenance and its corresponding second light attenuation parameter.

[0010] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0011] The method for determining the calibration light intensity range used when a phantom is used to inspect the optical transmission path of an fNIRS device provided in an embodiment of the present application uses a phantom that simulates the attenuation of light in a brain environment to test the probe groups in multiple fNIRS devices under a target type, and obtains the first attenuated light intensity data corresponding to each probe group under the target type, thereby obtaining the second attenuated light intensity data based on the measured data of each probe group under the target type and the first light attenuation parameter corresponding to the test phantom, and then the calibration light intensity range corresponding to the optical transmission path in the fNIRS device under the target type can be determined based on the second attenuated light intensity data. Since the first light attenuation parameter corresponding to the measured phantom is introduced when determining the calibration light intensity range, the second attenuated light intensity data corresponding to the specific light attenuation parameter can be determined, and then the calibration light intensity range corresponding to the specific light attenuation parameter can be obtained based on the second attenuated light intensity data. When the optical transmission path in the fNIRS device is subsequently inspected, even if a different inspection phantom is used during the inspection, the second optical attenuation parameter of the inspection phantom can be converted accordingly to obtain attenuated light intensity data corresponding to the specific optical attenuation parameter, so that the calibration light intensity range can be used for comparison to obtain accurate inspection results. In this way, there is no need to set the corresponding light intensity range for different detection environments in advance, which ensures the accuracy of the inspection results of the optical transmission path in the fNIRS device and reduces the cost of determining the calibration light intensity range.

[0012] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above description and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. Similar reference numerals with letter suffixes or different letter suffixes may represent different examples of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not by way of limitation, and together with the description and claims, are used to illustrate the disclosed embodiments. Such embodiments are illustrative and exemplary and are not intended to be exhaustive or exclusive embodiments of the present method, apparatus, system, or non-transitory computer-readable medium having instructions for implementing the method.

[0014] Figure 1 A schematic diagram of an optical transmission path according to an embodiment of the present application is shown.

[0015] Figure 2 A flow chart of a method for determining a calibrated light intensity range used when a phantom repairs an optical transmission path of an fNIRS device according to an embodiment of the present application is shown.

[0016] Figure 3 A flow chart of a method for repairing an optical transmission path in an fNIRS device using a phantom according to an embodiment of the present application is shown.

[0017] Figure 4 A structural block diagram of a device for determining a calibrated light intensity range used when repairing an optical transmission path of an fNIRS device using a phantom according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] 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.

[0019] 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. The words "include" or "comprises" and similar words used in this application mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of covering other elements. In this application, the arrows shown in the figures of each step are only examples of the execution order, not limitations. The technical solution of this application is not limited to the execution order described in the embodiments. The various steps in the execution order can be combined, decomposed, or the order can be changed, as long as the logical relationship of the execution content is not affected.

[0020] 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 here. Techniques and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the techniques and equipment should be considered as part of the specification.

[0021] In the present application, the arrows shown in the figures of each step are merely examples of the execution order, not limitations. The technical solution of the present application is not limited to the execution order described in the embodiments. The various steps in the execution order can be combined for execution, can be decomposed for execution, and can be reordered, as long as the logical relationship of the execution content is not affected.

[0022] 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 can specifically be 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 can include at least one of a light source part, a transmitting probe, a receiving probe, a transmission cable (such as an optical fiber) between the transmitting probe and the light source part, a transmission cable between the receiving probe and the optical processing module, and a light receiving part; in some embodiments, the components related to optical transmission can also include a head-mounted device for installing a transmitting probe and / or a receiving probe, and the head-mounted device can be, for example, a head cap worn on the head of the subject for installing a transmitting probe and / or a receiving probe. 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.

[0023] In summary, there is an optical transmission path in the near-infrared brain function imaging device that transmits near-infrared light to an object and / or transmits near-infrared light from an object, but the present application does not specifically limit the setting position of the optical transmission path, the design of specific components constituting the optical transmission path, the combination of each component, the matching method, etc.

[0024] Exemplarily, the schematic diagram of the optical transmission path in the near-infrared brain function 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 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 on the head cap via a transmission cable (such as an optical fiber), 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 acquired by the receiving probe D 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 processor or 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, the receiving probe D, and the head cap for installing the probe. This is only used as an example and does not constitute a limitation on the present application scheme.

[0025] Figure 2 A flow chart showing a method for determining a calibration light intensity range used when a phantom inspects an optical transmission path of an fNIRS device according to an embodiment of the present application is shown, the method comprising S201 to S203, wherein:

[0026] S201: For probe groups in multiple fNIRS devices under the same target type, using the transmitting probe and the receiving probe in each probe group, obtain first attenuated light intensity data of the output light emitted from the test phantom after the emitted incident light enters the detection environment of the test phantom.

[0027] S202: Obtain second attenuated light intensity data based on the first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and the first light attenuation parameter corresponding to the test phantom.

[0028] S203: Determine a calibrated light intensity range corresponding to the optical transmission path in the fNIRS device of the target type based on the second attenuated light intensity data, so as to inspect the optical transmission path in the fNIRS device of the target type based on the calibrated light intensity range, the inspection phantom used during inspection and its corresponding second light attenuation parameter.

[0029] The following is a detailed description of the above steps.

[0030] For S201, the target type can be understood as a specific model. Taking the fNIRS device model including models A to D as an example, the target type can be model A therein; the multiple fNIRS devices under the same target type can be fNIRS devices of the same type produced in the same batch, or can also be fNIRS devices of the same type produced in different batches; the probe groups in the multiple fNIRS devices can include at least one probe group corresponding to each fNIRS device; the test phantom is used to attenuate the input incident light and output the attenuated output light; the first attenuated light intensity data is used to characterize the light intensity of the output light emitted from the test phantom, which can be a light intensity value or a light intensity voltage value obtained after the photoelectric conversion processing of the fNIRS device, and the unit of the light intensity voltage value can be mV or other voltage units.

[0031] In a possible implementation, the test phantom may be a standard phantom or a non-standard phantom, wherein the light attenuation intensity corresponding to the standard phantom is a preset attenuation intensity, which may be 60 dB; and the light attenuation intensity corresponding to the non-standard phantom is other attenuation intensities except the preset attenuation intensity.

[0032] For S202, the first light attenuation parameter is used to characterize the attenuation degree of the test phantom to the incident light, which can be expressed in various forms, such as by attenuation intensity; the second attenuation light intensity data is used to characterize the light intensity of the output light of each probe group under the standard phantom detection environment, which can be a light intensity value, or a light intensity voltage value obtained after the photoelectric conversion processing of the fNIRS device, and the unit of the light intensity voltage value can be mV or other voltage units.

[0033] In a possible implementation manner, when the test phantom includes a plurality of pairs of test holes for installing probe groups, different pairs of test holes may correspond to different first light attenuation parameters.

[0034] In a possible implementation, when the second attenuated light intensity data is obtained based on the first attenuated light intensity data corresponding to each probe group in the detection environment of the test phantom and the first light attenuation parameter corresponding to the test phantom, the following situations can be considered:

[0035] Case 1: The test phantom is a standard phantom

[0036] In a possible implementation, the phantom type of the test phantom may be determined based on the first light attenuation parameter, and when the test phantom is determined to be a standard phantom, the first attenuated light intensity data may be directly used as the second attenuated light intensity data.

[0037] Specifically, when determining the phantom type of the test phantom based on the first light attenuation parameter, the determination may be made based on the first light attenuation parameter corresponding to the test hole position into which the probe group is inserted.

[0038] For example, taking the test holes where the probe groups are inserted as test holes "Emit 1 - Receive 1", "Emit 2 - Receive 2", and "Emit 3 - Receive 3", and the light attenuation parameter corresponding to the standard phantom is 60dB, if the first light attenuation parameters corresponding to the test holes "Emit 1 - Receive 1", "Emit 2 - Receive 2", and "Emit 3 - Receive 3" are all 60dB, then it can be determined that the current detection environment is the detection environment corresponding to the standard phantom, and the test phantom can be determined to be the standard phantom, and the first attenuation light intensity data corresponding to the current probe group can be used as the second attenuation light intensity data.

[0039] Case 2: The test phantom is a non-standard phantom

[0040] In one possible implementation, the phantom type of the test phantom may be first determined based on the first light attenuation parameter, and when it is determined that the test phantom is a non-standard phantom, the first attenuated light intensity data may be converted into second attenuated light intensity data at a preset attenuation intensity corresponding to a standard phantom based on the first attenuated light intensity data and the first light attenuation parameter corresponding to the test phantom.

[0041] Specifically, when the first attenuated light intensity data is converted into second attenuated light intensity data at a preset attenuation intensity corresponding to a standard phantom based on the first attenuated light intensity data and the first light attenuation parameter corresponding to the test phantom, the first attenuated light intensity data and the first light attenuation parameter corresponding to the test phantom can be substituted into a preset first light intensity conversion formula for calculation to obtain the second attenuated light intensity data at the preset attenuation intensity.

[0042] Exemplarily, the first light intensity conversion formula may be:

[0043]

[0044] in, Indicates the second attenuation light intensity data under the preset attenuation intensity; Indicates the first attenuated light intensity data; Indicates the first light attenuation parameter corresponding to the test phantom.

[0045] It should be noted that in the above embodiment, the basis for judging whether the phantom is a standard phantom is the light attenuation parameter, and the specific judgment method is to judge according to whether the light attenuation parameter is the light attenuation parameter corresponding to the standard phantom; in actual application, it is also possible to judge whether the phantom is a standard phantom based on parameters such as the model parameters of the phantom, and perform corresponding processing according to the judgment result, which is not limited in the present disclosed embodiment.

[0046] With respect to S203, the calibrated light intensity range may be used to inspect and repair the fNIRS device. When inspecting the fNIRS device, it may be determined whether the fNIRS device is faulty based on the calibrated light intensity range determined in advance.

[0047] In a possible implementation manner, when determining the calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type based on the second attenuated light intensity data, the following steps A1-A2 may be performed:

[0048] A1: Determine a first calibration range based on a numerical comparison result of each of the second attenuated light intensity data; and determine a range adjustment value based on a numerical distribution interval of the second attenuated light intensity data.

[0049] Here, the numerical distribution interval may be used to represent the distribution range of the second attenuated light intensity data, and the numerical distribution interval may be, for example, 100-150.

[0050] In a possible implementation, when determining the range adjustment value based on the numerical distribution interval of the second attenuated light intensity data, the interval length can be determined according to the numerical distribution interval of the second attenuated light intensity data, and the range adjustment value can be determined based on the interval length and a preset adjustment coefficient.

[0051] Continuing with the above example, still taking the numerical distribution interval of the second attenuated light intensity data as 100-150 and the preset adjustment coefficient as 0.2, the interval length can be determined to be 50, and then the range adjustment value can be determined to be 10 based on the product of the interval length and the adjustment coefficient.

[0052] In a possible implementation manner, when determining the first calibration range based on the numerical comparison result of each of the second attenuated light intensity data, the following steps A11-A12 may be performed:

[0053] A11: Screening the second attenuated light intensity data based on a preset abnormal data screening algorithm to obtain the second attenuated light intensity data after removing the abnormal data.

[0054] Among them, the abnormal data screening algorithm can be an abnormal data detection algorithm based on factors such as distribution, distance, density, clustering, and classification, among which the abnormal data detection algorithm based on distribution can be, for example, a 3sigma algorithm, a Z-score algorithm, etc.; the abnormal data detection algorithm based on distance can be, for example, a K-Nearest Neighbor (KNN) algorithm, etc.; the abnormal data detection algorithm based on density can be, for example, a local outlier factor (LOF) algorithm, etc.; the abnormal data detection algorithm based on clustering can be, for example, a density-based spatial clustering of applications with noise (DBSCAN) algorithm, etc.

[0055] In this way, before using the second attenuated light intensity data to determine the first calibration range, screening the second attenuated light intensity data for abnormal data can improve the accuracy of the ultimately determined first calibration range, and further improve the accuracy of the ultimately obtained calibration light intensity range.

[0056] A12: Determine the first calibration range based on the maximum value of each second attenuated light intensity data after removing abnormal data.

[0057] Here, the maximum value may include a maximum value and / or a minimum value.

[0058] Specifically, when determining the first calibration range based on the maximum value of each second attenuated light intensity data after removing abnormal data, the maximum value and minimum value of each second attenuated light intensity data can be used as boundary values ​​of the first calibration range to obtain the first calibration range.

[0059] Exemplarily, taking the maximum value of each second attenuated light intensity data after removing abnormal data as 150 and the minimum value as 100 as an example, it can be determined that the first calibration range is 100-150.

[0060] It should be noted that the above method of determining the first calibration range is only one possible implementation method. In actual applications, due to factors such as the presence of abnormal values ​​in the second attenuated light intensity data and the fact that a large calibration light intensity range may lead to insufficient accuracy of the detection results, other values ​​besides the maximum value can be used when actually determining the first calibration range. For example, the second largest value and the second smallest value in the second attenuated light intensity data may be used, and the disclosed embodiments do not limit this.

[0061] A2: Adjust the first calibration range based on the range adjustment value to obtain a calibrated light intensity range.

[0062] Here, when the first calibration range is adjusted based on the range adjustment value, the boundary value corresponding to the first calibration range may be adjusted based on the range adjustment value, so as to obtain the calibrated light intensity range.

[0063] Continuing with the above example, taking the first calibration range as 100-150 and the range adjustment value as 10, the lower limit 100 of the first calibration range can be adjusted according to the range adjustment value to obtain a new lower limit of 90; and the upper limit 150 of the first calibration range can be adjusted according to the range adjustment value to obtain a new upper limit of 160, so that a calibrated light intensity range of 90-160 can be obtained.

[0064] In this way, by adjusting the range based on the numerical distribution interval of the second attenuated light intensity data, the first calibration range determined based on the numerical comparison results of each of the second attenuated light intensity data is adjusted, so that a certain redundancy can be set for the calibration light intensity range used in subsequent maintenance processes, thereby avoiding excessive maintenance or premature scrapping of the equipment.

[0065] In practical applications, since a new device that has not been used is often used to determine the calibrated light intensity range, the calibrated light intensity range obtained at this time can represent the normal numerical value of the optical transmission path in the fNIRS device when it has not been used (that is, when it is working normally). Since the performance of the optical transmission path in the fNIRS device will show a downward trend as the fNIRS device is used, if the fNIRS device that has been used for a long time still uses the calibrated light intensity range corresponding to the new device, problems such as excessive maintenance of the equipment and premature scrapping may occur.

[0066] In a possible implementation manner, the calibrated light intensity range may also be updated through the following steps B1-B2:

[0067] B1: Acquire the third attenuated light intensity data obtained when the test phantom is used to repair the optical transmission path in the fNIRS device of the target type.

[0068] Here, the third attenuated light intensity data is used to characterize the attenuated light intensity data obtained when the fNIRS device under the target type is repaired, which can reflect the actual performance of the optical transmission path in the fNIRS device under the target type.

[0069] Specifically, the third attenuated light intensity data may be a light intensity value, or a light intensity voltage value obtained after photoelectric conversion processing by an fNIRS device, and the unit of the light intensity voltage value may be mV or other voltage units.

[0070] B2: updating the calibrated light intensity range based on the third attenuated light intensity data, and using the updated calibrated light intensity range as a criterion for the next maintenance.

[0071] In a possible implementation manner, when the calibrated light intensity range is updated based on the third attenuated light intensity data, the following steps B21-B22 may be performed:

[0072] B21: Based on the third attenuated light intensity data and the second attenuated light intensity data, determine a second calibration range for updating the calibrated light intensity range.

[0073] Specifically, when determining the second calibration range for updating the calibration light intensity range based on the third attenuated light intensity data and the first attenuated light intensity data, at least one of the following methods may be used:

[0074] Method 1: Calculate the second calibration range according to the third attenuated light intensity data and the second attenuated light intensity data.

[0075] Here, after obtaining the third attenuated light intensity data, the second calibration range for updating the calibration light intensity range can be calculated according to the third attenuated light intensity data and the second attenuated light intensity data in accordance with the method of determining the calibration range described in any of the above embodiments S201 to S203.

[0076] For example, taking the case where the second attenuated light intensity data contains light intensity voltage values ​​corresponding to 200 optical transmission paths, and the third attenuated light intensity data contains light intensity voltage values ​​corresponding to 50 optical transmission paths, when calculating the second calibration range, the light intensity voltage values ​​corresponding to the above-mentioned 250 optical transmission paths in total can be used for calculation, and one optical transmission path can be understood as the optical transmission path where one probe group is located.

[0077] Method 2: updating the second attenuated light intensity data based on the third attenuated light intensity data, and calculating the second calibration range based on the updated second attenuated light intensity data.

[0078] Here, after obtaining the third attenuated light intensity data, the second attenuated light intensity data can be updated using the third attenuated light intensity data according to a preset update rule, and the second calibration range can be calculated based on the updated second attenuated light intensity data.

[0079] The update rule may include a plurality of update sub-rules, and different update sub-rules may be selected for use according to the comparison result between the third attenuated light intensity data and the second attenuated light intensity data.

[0080] Case 1: The number of light intensity voltage values ​​included in the third attenuated light intensity data is greater than or equal to the number of light intensity voltage values ​​included in the second attenuated light intensity data.

[0081] In this case, the updating sub-rule may be: selecting first updating data for updating from the third attenuated light intensity data according to a first preset ratio, and updating the second attenuated light intensity data based on the first updating data.

[0082] Exemplarily, taking the case where the second attenuated light intensity data contains light intensity voltage values ​​corresponding to 200 optical transmission paths, the third attenuated light intensity data contains light intensity voltage values ​​corresponding to 250 optical transmission paths, and the first preset ratio is 20%, 50 first update data for updating can be selected from the third attenuated light intensity data according to the first preset ratio, and 50 first to-be-updated data to be updated can be selected from the second attenuated light intensity data. The above selection process can use random selection or the like, so that the first update data can be used to update the first to-be-updated data, thereby obtaining the updated second attenuated light intensity data that still contains light intensity voltage values ​​corresponding to 200 optical transmission paths.

[0083] Case 2: the number of light intensity voltage values ​​included in the third attenuated light intensity data is less than the number of light intensity voltage values ​​included in the second attenuated light intensity data.

[0084] In this case, the updating sub-rule may be: selecting second updating data for updating from the third attenuated light intensity data according to a second preset ratio, and updating the second attenuated light intensity data based on the second updating data.

[0085] The second preset ratio may be greater than or equal to the first preset ratio.

[0086] Exemplarily, taking the case where the second attenuated light intensity data contains light intensity voltage values ​​corresponding to 200 optical transmission paths, the third attenuated light intensity data contains light intensity voltage values ​​corresponding to 50 optical transmission paths, and the second preset ratio is 40%, 20 second updated data for updating can be selected from the third attenuated light intensity data according to the second preset ratio, and 20 second data to be updated can be selected from the second attenuated light intensity data. The above selection process can use random selection and other methods, so that the second update data can be used to update the second data to be updated, thereby obtaining the updated second attenuated light intensity data that still contains light intensity voltage values ​​corresponding to 200 optical transmission paths.

[0087] Method 3: Determine a second calibration range for updating the calibration light intensity range based on the third attenuated light intensity data, the second attenuated light intensity data, and weight information matching the usage status information.

[0088] Here, the usage status information of the fNIRS device under the target type under maintenance can be obtained, and based on the third attenuated light intensity data, the second attenuated light intensity data, and weight information matching the usage status information, the second calibration range for updating the calibration light intensity range is determined.

[0089] Among them, the usage status information may include at least one of the parameters such as usage time, number of uses, historical maintenance results, etc.; the weight information may be proportional to the usage time, and the longer the usage time, the more useful the corresponding third attenuated light intensity data is, so more third attenuated light intensity data can be used for updating accordingly; the weight information may be proportional to the number of uses, and the longer the usage time, the more useful the corresponding third attenuated light intensity data is, so more third attenuated light intensity data can be used for updating accordingly. The mapping relationship between the usage status information and the weight information can be set according to actual needs, and the embodiments of the present disclosure do not limit this.

[0090] Specifically, the number of light intensity voltage value updates can be determined based on the weight information matching the usage status information and the number of light intensity voltage values ​​contained in the third attenuated light intensity data, and the third update data for updating can be selected from the third attenuated light intensity data based on the number of light intensity voltage value updates, and the second attenuated light intensity data can be updated based on the third update data.

[0091] In this way, by introducing weight information that matches the usage status information when updating the light intensity calibration range, the light intensity calibration range can be adaptively updated according to the actual status of the fNIRS device during maintenance, so that the update of the light intensity calibration range is more in line with the actual usage status of the device, thereby improving the accuracy and practicality of the updated calibrated light intensity range.

[0092] B22: When the second calibration range satisfies a preset calibration range dynamic update condition, the calibration light intensity range is updated based on the second calibration range.

[0093] Here, the preset calibration range dynamic update condition includes that the second calibration range is within the updateable calibration range.

[0094] Among them, the boundary values ​​of the updateable calibration range can be pre-set, for example, the pre-set boundary values ​​are 80 and 180. Then, when the second calibration range is within the updateable calibration range of 80-180, it can be determined that the second calibration range satisfies the preset calibration range dynamic update condition; in addition, the boundary value of the updateable calibration range can also be determined based on abnormal attenuation light intensity data, and the abnormal attenuation light intensity data can be determined based on abnormal results when detecting the optical transmission path in the fNIRS device. For example, the abnormal data removed in the above A11 can be used as the abnormal attenuation light intensity data.

[0095] Furthermore, the abnormal attenuated light intensity data can be updated in real time following the abnormal value in the third attenuated light intensity data to improve the accuracy and real-time performance of the abnormal attenuated light intensity data. The method for determining the abnormal attenuated light intensity data can refer to the relevant description of determining the calibration range above, and the method for updating the abnormal attenuated light intensity data can refer to the relevant description of updating the calibration light intensity range above, which will not be repeated here.

[0096] In this way, when the calibrated light intensity range corresponding to the target type is used to perform optical transmission path inspection on the fNIRS device under the target type, the calibrated light intensity range is updated in real time according to the third attenuated light intensity data obtained during the inspection. Compared with only using a fixed calibrated light intensity range to inspect the fNIRS device, the dynamically updated light intensity range is more in line with the actual use of the fNIRS device. While ensuring the accuracy of the optical transmission path detection results, it can avoid excessive maintenance or premature scrapping of the equipment due to overly stringent detection standards, thereby reducing the use cost and maintenance cost of the fNIRS device.

[0097] In some embodiments of the present application, a method for repairing an optical transmission path in an fNIRS device using a phantom is provided, and the optical transmission path in the fNIRS device under the target type determined in any embodiment of the present application can be used to repair the optical transmission path in the fNIRS device under the target type.

[0098] In one possible implementation, see Figure 3 As shown, it is a flow chart of a method for repairing an optical transmission path in an fNIRS device using a phantom provided in an embodiment of the present disclosure, the method comprising S301 to S303, wherein:

[0099] S301: Acquire the initial light intensity detection result of the output light emitted from the maintenance phantom after the near-infrared light of the fNIRS device to be repaired under the target type enters the maintenance phantom detection environment.

[0100] Here, the initial light intensity detection result may be a light intensity voltage value representing the light intensity; the definition of the target type may refer to the above related description.

[0101] S302: Based on the initial light intensity detection result and the second light attenuation parameter corresponding to the maintenance phantom, determine the standard light intensity detection result of the optical transmission path in the fNIRS device to be repaired at a preset attenuation intensity corresponding to the standard phantom.

[0102] Here, the second light attenuation parameter is used to characterize the attenuation degree of the inspection phantom to the incident light, which can be expressed in various forms, such as by attenuation intensity.

[0103] Specifically, based on the initial light intensity detection result and the second light attenuation parameter corresponding to the maintenance phantom, the optical transmission path in the fNIRS device to be repaired is determined. When the standard light intensity detection result is obtained under the preset attenuation intensity corresponding to the standard phantom, the initial light intensity detection result and the second light attenuation parameter corresponding to the maintenance phantom are substituted into the preset second light intensity conversion formula for calculation to obtain the standard light intensity detection result.

[0104] Exemplarily, the second light intensity conversion formula may be:

[0105]

[0106] in, Indicates the standard light intensity detection result; Indicates the initial light intensity detection result; Indicates the second light attenuation parameter corresponding to the maintenance phantom.

[0107] In this way, by converting the initial light intensity detection result into a standard light intensity detection result under a preset attenuation intensity corresponding to the standard phantom, it is convenient to use the calibrated light intensity range to make corresponding judgments later.

[0108] S303: Determine the inspection result of the optical transmission path in the fNIRS device to be inspected based on the standard light intensity detection result and the calibrated light intensity range.

[0109] Here, if the light intensity data included in the standard light intensity detection result is outside the calibrated light intensity range, it can be determined that there is a fault in the optical transmission path in the fNIRS device to be repaired, and further troubleshooting is required; and if the light intensity data included in the standard light intensity detection result is within the calibrated light intensity range, it can be determined that the performance of the optical transmission path in the fNIRS device to be repaired meets the requirements.

[0110] In this way, by comparing the standard light intensity detection result obtained after conversion with the calibrated light intensity range, standardized detection of the performance of the optical transmission path in the fNIRS device is achieved, thereby improving the accuracy and credibility of the detection results of the performance of the optical transmission path in the fNIRS device.

[0111] The present application also provides a device for determining the calibration light intensity range used when a phantom is used to inspect the optical transmission path of an fNIRS device. Figure 4 As shown, the device 400 for determining the calibrated light intensity range used when the phantom inspects the optical transmission path of the fNIRS device includes an acquisition module 401 and a determination module 402. The acquisition module 401 is configured to obtain, for the probe groups in multiple fNIRS devices under the same target type, the first attenuated light intensity data of the outgoing light emitted from the test phantom after the incident light emitted enters the detection environment of the test phantom using the transmitting probe and the receiving probe in each probe group. The determination module 402 is configured to obtain the second attenuated light intensity data based on the first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and the first light attenuation parameter corresponding to the test phantom; and, based on the second attenuated light intensity data, determine the calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type, so as to inspect the optical transmission path in the fNIRS device under the target type based on the calibrated light intensity range, the inspection phantom used during the inspection and the second light attenuation parameter corresponding thereto.

[0112] The device for determining the calibration light intensity range used when a phantom is used to inspect the optical transmission path of an fNIRS device provided in an embodiment of the present application uses a phantom that simulates the attenuation of light in a brain environment to test the probe groups in multiple fNIRS devices under a target type, and obtains the first attenuated light intensity data of the optical transmission path corresponding to each probe group under the target type, thereby obtaining the second attenuated light intensity data based on the measured data of each probe group under the target type and the first light attenuation parameter corresponding to the test phantom, and then determining the calibration light intensity range corresponding to the optical transmission path in the fNIRS device under the target type based on the second attenuated light intensity data. Since the first light attenuation parameter corresponding to the measured phantom is introduced when determining the calibration light intensity range, the second attenuated light intensity data corresponding to the specific light attenuation parameter can be determined, and then the calibration light intensity range corresponding to the specific light attenuation parameter can be obtained based on the second attenuated light intensity data. When the optical transmission path in the fNIRS device is subsequently inspected, even if a different inspection phantom is used during the inspection, the second optical attenuation parameter of the inspection phantom can be converted accordingly to obtain attenuated light intensity data corresponding to the specific optical attenuation parameter, so that the calibration light intensity range can be used for comparison to obtain accurate inspection results. In this way, there is no need to set the corresponding light intensity range for different detection environments in advance, which ensures the accuracy of the inspection results of the optical transmission path in the fNIRS device and reduces the cost of determining the calibration light intensity range.

[0113] The present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for determining the calibration light intensity range used when repairing the optical transmission path of the fNIRS device of the phantom described in the above method embodiment are executed. The storage medium can be a volatile or non-volatile computer-readable storage medium.

[0114] The embodiments of the present disclosure also provide a computer program product, which carries a program code. The instructions included in the program code can be used to execute the steps of the method for determining the calibration light intensity range used when the optical transmission path of the fNIRS device for phantom repair is described in the above method embodiment. For details, please refer to the above method embodiment, which will not be repeated here.

[0115] The computer program product may be implemented in hardware, software or a combination thereof. In one optional embodiment, the computer program product is implemented as a computer storage medium. In another optional embodiment, the computer program product is implemented as a software product, such as a software development kit (SDK).

[0116] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. In the several embodiments provided in the present disclosure, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0117] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0118] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0119] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0120] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present disclosure, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for determining a calibration light intensity range used when inspecting an optical transmission path of an fNIRS device using a phantom, characterized in that: The fNIRS device includes at least one probe group, wherein each probe group includes a transmitting probe for transmitting near-infrared light to the object and a receiving probe for acquiring near-infrared light from the object, and the method includes: For probe groups in multiple fNIRS devices under the same target type, using a transmitting probe and a receiving probe in each probe group, obtaining first attenuated light intensity data of an outgoing light emitted from the test phantom after the emitted incident light enters the detection environment of the test phantom; Based on the first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and the first light attenuation parameter corresponding to the test phantom, second attenuated light intensity data is obtained; Based on the second attenuated light intensity data, a calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type is determined, so as to perform maintenance on the optical transmission path in the fNIRS device under the target type based on the calibrated light intensity range, the maintenance phantom used during maintenance and its corresponding second light attenuation parameter; wherein, The step of determining, based on the second attenuated light intensity data, a calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type specifically includes: Determine a first calibration range based on a numerical comparison result of the second attenuated light intensity data after removing abnormal data; and determine a range adjustment value based on a numerical distribution interval of the second attenuated light intensity data; The first calibration range is adjusted based on the range adjustment value to obtain a calibrated light intensity range.

2. The method according to claim 1, characterized in that The obtaining of the second attenuated light intensity data based on the first attenuated light intensity data corresponding to each probe group under the detection environment of the test phantom and the first light attenuation parameter corresponding to the test phantom specifically includes: In the case where the test phantom is a non-standard phantom, the first attenuated light intensity data is converted into second attenuated light intensity data at a preset attenuation intensity corresponding to a standard phantom based on the first attenuated light intensity data and a first light attenuation parameter corresponding to the test phantom.

3. The method according to claim 1, characterized in that The determining of the first calibration range based on the numerical comparison result of the second attenuated light intensity data after removing the abnormal data specifically includes: Screening the second attenuated light intensity data based on a preset abnormal data screening algorithm to obtain the second attenuated light intensity data after removing the abnormal data; The first calibration range is determined based on the maximum value of each second attenuated light intensity data after the abnormal data is removed.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Acquiring third attenuated light intensity data obtained when using the test phantom to repair the optical transmission path in the fNIRS device of the target type; The calibrated light intensity range is updated based on the third attenuated light intensity data, and the updated calibrated light intensity range is used as a criterion for the next maintenance.

5. The method according to claim 4, characterized in that The updating of the calibrated light intensity range based on the third attenuated light intensity data specifically includes: Determining a second calibration range for updating the calibration light intensity range based on the third attenuated light intensity data and the second attenuated light intensity data; When the second calibration range satisfies a preset calibration range dynamic update condition, the calibration light intensity range is updated based on the second calibration range.

6. The method according to claim 5, characterized in that The determining, based on the third attenuated light intensity data and the first attenuated light intensity data, a second calibration range for updating the calibration light intensity range specifically includes: The second attenuated light intensity data is updated based on the third attenuated light intensity data, and the second calibration range is calculated based on the updated first attenuated light intensity data.

7. The method according to claim 5 or 6, characterized in that: The determining, based on the third attenuated light intensity data and the second attenuated light intensity data, a second calibration range for updating the calibration light intensity range specifically includes: Obtaining the usage status information of the fNIRS device under the target type under maintenance; Based on the third attenuated light intensity data, the second attenuated light intensity data, and weight information matched with the usage status information, a second calibration range for updating the calibrated light intensity range is determined.

8. A method for repairing an optical transmission path in an fNIRS device using a phantom, characterized in that: The optical transmission path in the fNIRS device under the target type is inspected and repaired by using the calibrated light intensity range corresponding to the optical transmission path in the fNIRS device under the target type determined by the method described in any one of claims 1 to 7.

9. The method according to claim 8, characterized in that Using the calibrated light intensity range corresponding to the light transmission path in the fNIRS device under the target type, the light transmission path in the fNIRS device under the target type is inspected and repaired, specifically including: Acquire an initial light intensity detection result of the output light emitted from the maintenance phantom after the near-infrared light of the fNIRS device to be repaired under the target type enters the maintenance phantom detection environment; Based on the initial light intensity detection result and the second light attenuation parameter corresponding to the maintenance phantom, determining the standard light intensity detection result of the light transmission path in the fNIRS device to be repaired at a preset attenuation intensity corresponding to the standard phantom; Based on the standard light intensity detection result and the calibrated light intensity range, an inspection result of the optical transmission path in the fNIRS device to be inspected is determined.

10. A device for determining a calibration light intensity range used when inspecting an optical transmission path of an fNIRS device using a phantom, characterized in that: A method for determining a calibrated light intensity range used when repairing an optical transmission path of an fNIRS device on a phantom as described in any one of claims 1 to 7 is used.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for determining a calibrated light intensity range used when a phantom is used to repair an optical transmission path of an fNIRS device are implemented as described in any one of claims 1 to 7; or the steps of the method for repairing an optical transmission path in an fNIRS device using a phantom are implemented as described in claim 8 or 9.

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