Wearable brain imaging system
By setting up a multi-wavelength light source module and an input acquisition module for the left and right brain in the wearable brain imaging system, the function of simultaneously collecting blood oxygen signals of the left and right brain is realized, solving the problem that cannot be collected simultaneously in the existing technology, and improving the richness of the signal.
Patent Information
- Application Number
- CN202420777051.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the prior art, functional near-infrared spectral imaging cannot simultaneously collect left-brain blood oxygen signals and right-brain blood oxygen signals.
A wearable brain imaging system is designed, by providing a light source module and an input acquisition module in the first acquisition area and the second acquisition area respectively, the detection light signals of at least two wavelengths are output, and blood oxygen signals of different detection depths are collected.
The simultaneous acquisition of blood oxygen signals from the left and right brains is achieved, which solves the problem that cannot be collected simultaneously in the existing technology, and increases the richness of the signal through the design of multiple wavelengths and multiple detection depths.
Smart Images
Figure CN222640479U_ABST
Abstract
Description
Technical Field
[0001] The embodiment of the utility model relates to the technical field of brain imaging, and in particular to a wearable brain imaging system. Background Art
[0002] In recent years, the use of functional near-infrared spectroscopy in cognitive neuroscience has increased rapidly. Functional near-infrared spectroscopy (fNIRS) is an optical, non-invasive neuroimaging technique that measures changes in the concentration of oxygenated (HbO2) and deoxygenated (HbR) hemoglobin in brain tissue after neuronal activation. In fNIRS systems, the design of the signal acquisition module is an important issue. The signal acquisition modules of existing fNIRS devices are often designed with heavy optical fibers pressing on the subject's head and a small number of acquisition channels, which makes it impossible to simultaneously acquire left and right brain blood oxygen signals. Utility Model Content
[0003] In view of the above problems, an embodiment of the utility model provides a wearable brain imaging system, which is used to solve the technical problem in the prior art that near-infrared spectral imaging cannot simultaneously collect left brain blood oxygen signals and right brain blood oxygen signals.
[0004] According to one aspect of the embodiment of the present utility model, a wearable brain imaging system is provided, the wearable brain imaging system comprising:
[0005] A control module, used for outputting a first acquisition area light source control signal and a second acquisition area light source control signal;
[0006] A first light source module, connected to the control module, disposed in the first collection area, and used to output first collection area detection light signals of at least two wavelengths according to the first collection area light source control signal;
[0007] A second light source module, connected to the control module, disposed in the second collection area, and configured to output a second collection area detection light signal of at least two wavelengths according to the second collection area light source control signal;
[0008] A first input acquisition module, connected to the control module, disposed in the first acquisition area, and used to acquire a first blood oxygen optical signal of a first detection depth and a second blood oxygen optical signal of a second detection depth;
[0009] a second input acquisition module, connected to the control module, disposed in the second acquisition area, and used to acquire a third blood oxygen optical signal at a third detection depth and a fourth blood oxygen optical signal at a fourth detection depth;
[0010] The control module is also used to convert the first blood oxygen optical signal, the second blood oxygen optical signal, the third blood oxygen optical signal and the fourth blood oxygen optical signal into corresponding blood oxygen digital signals respectively to obtain a first blood oxygen digital signal of the first detection depth of the first acquisition area, a second blood oxygen digital signal of the second detection depth, a third blood oxygen digital signal of the third detection depth of the second acquisition area, and a fourth blood oxygen digital signal of the fourth detection depth.
[0011] In an optional manner, the first light source module or the second light source module includes at least 2N dual-wavelength LEDs respectively, and each of the dual-wavelength LEDs is arranged in an array with equal intervals.
[0012] In an optional manner, the first input acquisition module or the second input acquisition module includes 2M detectors respectively, and two detectors are arranged at equal intervals between every two dual-wavelength LEDs.
[0013] In an optional manner, N is equal to 4, M is equal to 10, the spacing between each of the dual-wavelength LEDs is 45 mm, and the spacing between the two detectors that are equally spaced between every two dual-wavelength LEDs is 15 mm.
[0014] In an optional manner, the wearable brain imaging system further includes a power module, and the power module is respectively connected to the control module, the first light source module, the second light source module, the first input acquisition module, and the second input acquisition module;
[0015] The power supply module is used to provide working power for the control module, the first light source module, the second light source module, the first input acquisition module and the second input acquisition module.
[0016] In an optional manner, the wearable brain imaging system further includes a charging and discharging module and an energy storage module, wherein the energy storage module is connected to the charging and discharging module, and the charging and discharging module is connected to the power supply module;
[0017] The energy storage module is used to obtain electrical energy from the power module for storage; or to provide electrical energy to the power module.
[0018] In an optional manner, the wearable brain imaging system further includes a data storage module, and the data storage module is connected to the control module;
[0019] The data storage module is used to store the first blood oxygen digital signal, the second blood oxygen digital signal, the third blood oxygen digital signal and the fourth blood oxygen digital signal.
[0020] In an optional embodiment, the wearable brain imaging system also includes a flexible part, a cable socket and a cable, and the first light source module, the second light source module, the first input acquisition module and the second input acquisition module are arranged on the flexible part, and the flexible part is fixedly connected to the cable socket and the cable, respectively; the circumferential length of the flexible part, the cable socket and the cable is adjusted by controlling the length of the cable inserted into the cable socket.
[0021] In an optional manner, the wearable brain imaging system also includes a peripheral device, which is connected to the control module.
[0022] In an optional manner, the peripheral device includes one or more of a calculator, a display, and a speaker.
[0023] In an optional manner, when the external device is a calculator, a display or a speaker, when the display displays a picture or the speaker makes a sound, the control module marks the first blood oxygen digital signal, the second blood oxygen digital signal, the third blood oxygen digital signal and the fourth blood oxygen digital signal detected at the corresponding moment to indicate that the current collected data is generated when there is external stimulation.
[0024] The utility model realizes the collection of the blood oxygen digital signal of one of the left brain and the right brain by respectively setting a first light source module and a first input collection module in the first collection area, and realizes the collection of the remaining part of the blood oxygen digital signal by setting a second light source module and a second input collection module in the second collection area, so that the blood oxygen signals of the first collection area and the second collection area can be collected simultaneously, that is, the blood oxygen signals of the left brain and the blood oxygen signals of the right brain can be collected simultaneously, thereby solving the technical problem in the prior art that near-infrared spectral imaging cannot collect the blood oxygen signals of the left brain and the blood oxygen signals of the right brain at the same time.
[0025] In addition, since each light source module can output detection light signals of at least two wavelengths, the blood oxygen signals of two different detection depths in each area can be measured simultaneously, thereby making the collected signals richer.
[0026] The above description is only an overview of the technical solution of the embodiment of the utility model. In order to more clearly understand the technical means of the embodiment of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings are only used to illustrate the embodiments and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:
[0028] Figure 1 A module schematic diagram of an embodiment of a wearable brain imaging system provided by the utility model is shown;
[0029] Figure 2 A schematic structural diagram of an embodiment of a first light source module and a first input acquisition module in a wearable brain imaging system provided by the utility model is shown;
[0030] Figure 3 The structure diagram of the wearable brain imaging system provided by the utility model is shown;
[0031] Figure 4 A module schematic diagram of another embodiment of the wearable brain imaging system provided by the utility model is shown;
[0032] Figure 5 A structural schematic diagram of another embodiment of the first light source module and the first input acquisition module in the wearable brain imaging system provided by the utility model is shown. DETAILED DESCRIPTION
[0033] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein.
[0034] The following is an analysis of wearable brain imaging system solutions in the prior art in combination with relevant technologies.
[0035] Functional near-infrared spectroscopy (fNIRS) is a technique that can image the hemodynamic response of the cerebral cortex in real time. By placing multiple light sources and detectors on the human scalp, fNIRS can non-invasively measure changes in oxyhemoglobin and deoxyhemoglobin. Commercially available fNIRS systems have a temporal resolution of 1 to 10 Hz, a depth sensitivity of approximately 1.5 cm, and a spatial resolution of up to 1 cm. fNIRS has been shown to have many applications in the social sciences, basic neuroimaging research, and medicine, and is suitable for adults and infants, and has strong anti-interference capabilities in various indoor or outdoor scenarios.
[0036] The signal acquisition modules of existing fNIRS devices are often designed with heavy optical fibers pressing on the subject's head, which is uncomfortable to wear and not suitable for long-term measurements. The number of acquisition channels is also small, and it is impossible to simultaneously collect left and right brain blood oxygen signals. The equipment is expensive, making it difficult for the general public to accept.
[0037] The present application provides a wearable brain imaging system, which solves the technical problem that near-infrared spectral imaging cannot simultaneously collect left brain blood oxygen signals and right brain blood oxygen signals by providing a light source module and an input collection module that respectively cover two different collection areas.
[0038] Figure 1 The module diagram of the first embodiment of the wearable brain imaging system of the utility model is shown, and the wearable brain imaging system includes a first light source module 102, a second light source module 103, a first input acquisition module 105, a second input acquisition module 104 and a control module 101, and the control module 101 is respectively connected to the first light source module 102, the second light source module 103, the first input acquisition module 105 and the second input acquisition module 104. The first light source module 102 and the first input acquisition module 105 are arranged in the first acquisition area, and the second light source module 103 and the second input acquisition module 104 are arranged in the second acquisition area.
[0039] Among them, the control module 101 outputs a first acquisition area light source control signal and a second acquisition area light source control signal, and the first light source module 102 outputs a first acquisition area detection light signal of at least two wavelengths according to the first acquisition area light source control signal; the second light source module 103 outputs a second acquisition area detection light signal of at least two wavelengths according to the second acquisition area light source control signal. The first input acquisition module 105 acquires a first blood oxygen light signal of a first detection depth and a second blood oxygen light signal of a second detection depth; the second input acquisition module 104 acquires a third blood oxygen light signal of a third detection depth and a fourth blood oxygen light signal of a fourth detection depth. The control module 101 is also used to convert the first blood oxygen light signal, the second blood oxygen light signal, the third blood oxygen light signal and the fourth blood oxygen light signal into corresponding blood oxygen digital signals respectively to obtain a first blood oxygen digital signal of a first detection depth of the first acquisition area, a second blood oxygen digital signal of a second detection depth, a third blood oxygen digital signal of a third detection depth of the second acquisition area, and a fourth blood oxygen digital signal of a fourth detection depth.
[0040] The utility model realizes the collection of the blood oxygen digital signal of one of the left brain and the right brain by respectively setting the first light source module 102 and the first input collection module 105 in the first collection area, and realizes the collection of the remaining part of the blood oxygen digital signal by setting the second light source module 103 and the second input collection module 104 in the second collection area, so that the blood oxygen signals of the first collection area and the second collection area can be collected at the same time. When actually detecting, the first collection area corresponds to the collection of the left brain blood oxygen signal, and the second collection area corresponds to the collection of the right brain blood oxygen signal, so that the technical problem that the near-infrared spectral imaging in the prior art cannot collect the left brain blood oxygen signal and the right brain blood oxygen signal at the same time can be determined to be solved.
[0041] In addition, since each light source module can output detection light signals of at least two wavelengths, the blood oxygen signals of two different detection depths in each area can be measured simultaneously, thereby making the collected signals richer.
[0042] Optionally, refer to Figure 2 as well as Figure 5 As shown, the first light source module 102 or the second light source module 103 includes at least 2N dual-wavelength LEDs respectively, each of which is arranged in an array at equal intervals, and N is a natural number greater than 1.
[0043] At this time, the dual wavelengths can be incident at different collection depths, thus forming two channels with different detection depths, thereby increasing the number of brain microvessels collected, expanding the collection range, and making the collected signals richer.
[0044] Optionally, refer to Figure 2 as well as Figure 5 As shown, the first input acquisition module 105 or the second input acquisition module 104 includes 2M detectors PD respectively, two detectors PD are arranged at equal intervals between every two dual-wavelength LEDs, and M is a natural number greater than 1.
[0045] At this time, each dual-wavelength LED is correspondingly provided with two detectors PD, thereby forming a 2*2 signal collection channel.
[0046] Optionally, refer to Figure 2 as well as Figure 5 As shown, N is equal to 4, M is equal to 10, the spacing between each dual-wavelength LED is 45 mm, and the spacing between two detectors PD arranged at equal intervals between every two dual-wavelength LEDs is 15 mm.
[0047] Optionally, the wavelengths of the dual-wavelength LED are 760 mm and 850 mm respectively.
[0048] According to the above settings, 8 dual-wavelength LEDs and 20 detector PDs can form 80 signal acquisition channels, thereby increasing the number of brain microvessels collected, expanding the collection range, and making the collected signals richer.
[0049] Optionally, refer to Figure 4 As shown, the wearable brain imaging system further includes a power module 106, which is respectively connected to the control module 101, the first light source module 102, the second light source module 103, the first input acquisition module 105 and the second input acquisition module 104.
[0050] The power module 106 provides working power to the control module 101 , the first light source module 102 , the second light source module 103 , the first input acquisition module 105 and the second input acquisition module 104 .
[0051] Optionally, refer to Figure 4 As shown, the power module 106 can select a commonly used transformer circuit, power supply circuit or combination thereof in the prior art, and only needs to realize separate power supply. When the voltage is not compatible, its transformer function is appropriately increased. At this time, the wearable brain imaging system can directly obtain power from the connected host computer or a dedicated power supply source to maintain normal operation.
[0052] Optionally, refer to Figure 4 As shown, the wearable brain imaging system also includes a charging and discharging module 107 and an energy storage module. The energy storage module is connected to the charging and discharging module 107 , and the charging and discharging module 107 is connected to the power supply module 106 .
[0053] The charging and discharging module 107 inputs power to the energy storage module, or outputs power from the energy storage module 108. The energy storage module 108 obtains electric energy from the power module 106 for storage, or provides electric energy to the power module 106.
[0054] It should be noted that the charge and discharge module 107 at this time can be implemented by using a charge and discharge circuit in the prior art, and the energy storage module 108 can be various types of batteries.
[0055] Optionally, refer to Figure 4 As shown, the wearable brain imaging system further includes a data storage module, and the data storage module 110 is connected to the control module 101 .
[0056] The data storage module 110 stores the first blood oxygen digital signal, the second blood oxygen digital signal, the third blood oxygen digital signal, and the fourth blood oxygen digital signal.
[0057] The data storage module 110 may be a variety of storage media such as flash memory.
[0058] Optionally, refer to Figure 3 As shown, the wearable brain imaging system also includes a flexible part, a cable socket 201 and a cable 202. The first light source module 102, the second light source module 103, the first input acquisition module 105 and the second input acquisition module 104 are arranged on the flexible part, and the flexible part is fixedly connected to the cable 202, the cable 202 socket 201 and the cable 202 respectively; the surrounding circumference of the flexible part, the cable 202, the cable 202 socket 201 and the cable 202 is adjusted by controlling the length of the cable 202 inserted into the cable 202, the cable 202 socket 201.
[0059] The flat cable 202 and the socket 201 are connected front to back, and the flat cable 202 can be freely adjusted forward or backward, so that the device can adapt to different head circumferences.
[0060] The flexible part is a deformable substrate or an FPC headband harness.
[0061] Optionally, the wearable brain imaging system further includes a peripheral device 109 , which is connected to the control module 101 .
[0062] Optionally, the peripheral device 109 includes one or more of a calculator, a display, and a speaker.
[0063] Optionally, when the peripheral device 109 is a calculator, a display or a speaker, when the display displays a picture or the speaker makes a sound, the control module 101 marks the first blood oxygen digital signal, the second blood oxygen digital signal, the third blood oxygen digital signal and the fourth blood oxygen digital signal detected at the corresponding moment to indicate that the current collected data is generated when there is external stimulation.
[0064] At this time, after the display generates an audio or video signal, it will send a signal to the control module 101, indicating that an external stimulation signal is generated at this moment, which is equivalent to marking the collected blood oxygen signal at this moment, indicating that the blood oxygen change at this moment is caused by the stimulation signal.
[0065] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various aspects of the present invention, in the above description of the exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims that follow the specific embodiments are hereby expressly incorporated into the specific embodiments, wherein each claim itself serves as a separate embodiment of the present invention.
[0066] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive.
[0067] It should be noted that the above embodiments illustrate the utility model rather than limit the utility model, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the existence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the existence of multiple such elements. The utility model can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names. The steps in the above embodiments should not be understood as limitations on the order of execution unless otherwise specified.
Claims
1. A wearable brain imaging system, characterized in that: The wearable brain imaging system comprises: A control module, used for outputting a first acquisition area light source control signal and a second acquisition area light source control signal; A first light source module, connected to the control module, disposed in the first collection area, and used to output first collection area detection light signals of at least two wavelengths according to the first collection area light source control signal; A second light source module, connected to the control module, disposed in the second collection area, and configured to output a second collection area detection light signal of at least two wavelengths according to the second collection area light source control signal; A first input acquisition module, connected to the control module, disposed in the first acquisition area, and used to acquire a first blood oxygen optical signal of a first detection depth and a second blood oxygen optical signal of a second detection depth; a second input acquisition module, connected to the control module, disposed in the second acquisition area, and used to acquire a third blood oxygen optical signal at a third detection depth and a fourth blood oxygen optical signal at a fourth detection depth; The control module is also used to convert the first blood oxygen optical signal, the second blood oxygen optical signal, the third blood oxygen optical signal and the fourth blood oxygen optical signal into corresponding blood oxygen digital signals respectively to obtain a first blood oxygen digital signal of the first detection depth of the first acquisition area, a second blood oxygen digital signal of the second detection depth, a third blood oxygen digital signal of the third detection depth of the second acquisition area, and a fourth blood oxygen digital signal of the fourth detection depth.
2. The wearable brain imaging system according to claim 1, characterized in that The first light source module or the second light source module includes at least 2N dual-wavelength LEDs, respectively, and each of the dual-wavelength LEDs is arranged in an array with equal intervals.
3. The wearable brain imaging system according to claim 2, characterized in that The first light source module or the second light source module includes 2M detectors respectively, and two detectors are arranged at equal intervals between every two dual-wavelength LEDs.
4. The wearable brain imaging system according to claim 3, characterized in that N is equal to 4, M is equal to 10, the spacing between each of the dual-wavelength LEDs is 45 mm, and the spacing between the two detectors arranged at equal intervals between every two dual-wavelength LEDs is 15 mm.
5. The wearable brain imaging system according to claim 1, characterized in that: The wearable brain imaging system further includes a power module, which is respectively connected to the control module, the first light source module, the second light source module, the first input acquisition module, and the second input acquisition module; The power supply module is used to provide working power for the control module, the first light source module, the second light source module, the first input acquisition module and the second input acquisition module.
6. The wearable brain imaging system according to claim 5, characterized in that The wearable brain imaging system further includes a charging and discharging module and an energy storage module, wherein the energy storage module is connected to the charging and discharging module, and the charging and discharging module is connected to the power supply module; The energy storage module is used to obtain electrical energy from the power module for storage; or to provide electrical energy to the power module.
7. The wearable brain imaging system according to claim 1, characterized in that The wearable brain imaging system further comprises a data storage module, wherein the data storage module is connected to the control module; The data storage module is used to store the first blood oxygen digital signal, the second blood oxygen digital signal, the third blood oxygen digital signal and the fourth blood oxygen digital signal.
8. The wearable brain imaging system according to claim 1, characterized in that: The wearable brain imaging system also includes a flexible part, a cable socket and a cable. The first light source module, the second light source module, the first input acquisition module and the second input acquisition module are arranged on the flexible part, and the flexible part is fixedly connected to the cable socket and the cable, respectively. The circumference of the flexible part, the cable socket and the cable is adjusted by controlling the length of the cable inserted into the cable socket.
9. The wearable brain imaging system according to claim 1, characterized in that: The wearable brain imaging system also includes a peripheral device, which is connected to the control module.
10. The wearable brain imaging system according to claim 9, characterized in that: When the external device is a calculator, a display or a speaker, when the display displays a picture or the speaker makes a sound, the control module marks the first blood oxygen digital signal, the second blood oxygen digital signal, the third blood oxygen digital signal and the fourth blood oxygen digital signal detected at the corresponding moment to indicate that the current collected data is generated when there is an external stimulus.