Near-infrared transmission and reflection mode fusion imaging system

Abstract

The utility model discloses a near-infrared transmission and reflection mode fusion imaging system. The imaging system comprises an illumination system, a data acquisition system and an information processing system which are connected in sequence, the lighting system comprises a laser; the data acquisition system is used for acquiring near-infrared image information of a test object; and the information processing system is used for providing an image processing and analysis algorithm so as to analyze the near-infrared image information. According to the utility model, on the basis of near-infrared transmission and reflection mode fusion imaging technology, bone defect detection of a position point of the oral implant and the periphery of the implant is realized; based on selection of the near-infrared light source and the near-infrared detector suitable for the oral cavity, clear images can be obtained in the oral cavity environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral implants, and in particular relates to a near-infrared transmission-reflection modality fusion imaging system. Background Art

[0002] Artificial dental implants have a wide range of clinical applications in the field of contemporary stomatology and are considered to be the best treatment for repairing tooth defects and missing teeth. They have changed the repair model of human tooth loss and have played an irreplaceable role in maintaining the integrity of oral and maxillofacial organs, restoring oral function, ensuring oral health, and maintaining systemic health. At present, X-ray and cone CT examinations are commonly used imaging methods to evaluate the structure of implants and their surrounding tissues. However, radiographic examinations have some limitations. First, oral implant treatment requires multiple imaging evaluation tests. Although radiographic examinations can clearly show the structure of teeth, implants, and their surrounding tissues, patients and instrument operators may be exposed to radioactive examinations, and excessive examinations may be harmful to the human body. Secondly, current imaging tests require the use of special radiographic examination rooms, and the shooting time is usually 3-5 minutes, which is not convenient for rapid and effective imaging examinations next to the dental chair. Therefore, in clinical practice, it is necessary to explore a new imaging imaging system to improve the current situation and achieve the goal of convenience, speed, and no radiation.

[0003] After complete bone integration, implants that heal in a submerged manner must undergo another procedure called a second-stage surgery or implant exposure surgery in order to perform implant restoration. Traditional second-stage surgery involves taking CBCT or X-rays in advance to assess the degree of bone integration and implant position. During the operation, the surgeon uses a sharp probe to determine the center position of the implant under local anesthesia. However, this process is not simple and requires the surgeon to have rich clinical experience and keen hand feel, and a clear understanding of the three-dimensional axial position of the implant. Usually, it is difficult to quickly and accurately locate the center position of the implant, which may cause unnecessary trauma to the gingival tissue, increase the time of the second-stage operation, and bring psychological pressure to the patient. Therefore, it is of great clinical value to develop a fast, convenient, and minimally invasive tool to detect the position of the implant.

[0004] Peri-implantitis is an inflammation characterized by soft tissue infection around implants, absorption of supporting bone tissue, and formation of pockets around implants, accompanied by clinical symptoms such as bleeding and pus discharge from probes. Due to bone loss around implants, it manifests as cracked bone defects on the buccal and lingual sides of the bone surface. Usually, imaging is accompanied by bone tissue absorption around implants, but it is worth noting that due to the small amount of bone absorption in the early stage, especially the bone absorption on the buccal and lingual sides due to the anatomical position, it is difficult to judge early. In addition, the sensitivity of radiological examinations is low, and false negative results may occur, so a combination of clinical and radiological diagnosis is required. Therefore, the development of an instrument for detecting the amount of bone defects around implants has good clinical prospects.

[0005] Near-infrared light originates from the frequency doubling and main frequency absorption spectra of molecular vibration spectra, which is mainly caused by the non-resonance of molecular vibration. This spectrum can be used to detect the vibration state of molecules, has strong penetration ability, and does not require any pre-treatment when detecting samples, realizing real-time, rapid and pollution-free detection. Under near-infrared light irradiation, when the light matches the vibration frequency of the molecular group, resonance will occur, causing the energy of the light to be transferred to the molecule through the change of the molecular dipole moment, which reduces the penetration of near-infrared light. On the contrary, if the light and the vibration frequency do not match, the near-infrared light has strong penetration and can be used for spectral analysis. Therefore, when a sample is irradiated with near-infrared light of continuously changing frequency, the near-infrared light after passing through the sample will become weak in certain wavelength ranges due to the selective absorption of near-infrared light of different frequencies by the sample, and the transmitted near-infrared light carries the information of the components and structure of the organic matter. By analyzing the optical density of the transmitted or reflected light by the detector, the position, depth and other information of the component can be determined, which is suitable for clinical applications in many fields. In the field of optical imaging, the application of near-infrared light has achieved remarkable achievements in medicine, biology and chemistry.

[0006] Near infrared, also known as short-wave infrared, has a wavelength between 0.76 and 1.5 microns. Due to its deep tissue penetration ability, which can reach 5 to 10 mm, it directly acts on human tissues, covering skin blood vessels, lymphatic vessels, nerve endings and other subcutaneous tissues, and is suitable for imaging technology. In contrast, far infrared, or long-wave infrared, has a wavelength between 1.5 and 400 microns, is mainly absorbed by the surface skin, and the penetration depth is limited to less than 2 mm, so it is not suitable for deep imaging. After near-infrared irradiates the body surface, part of the light is reflected, and the other part is absorbed by the skin and transmitted. The degree of skin reflection of near-infrared is closely related to the pigmentation. When irradiated with near-infrared light with a wavelength of 0.9 microns, non-pigmented skin reflects about 60% of the energy, while pigmented skin reflects about 40% of the energy. This characteristic enables near-infrared to provide clear and differentiated imaging under different skin conditions, providing a useful tool for real-time observation and detection in medicine and other fields. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a near-infrared transmission-reflection modality fusion imaging system, wherein the imaging system comprises an illumination system, a data acquisition system and an information processing system which are arranged in sequence;

[0008] The lighting system includes a laser;

[0009] The data acquisition system is used to collect near-infrared image information of the test object;

[0010] The information processing system is used to provide image processing and analysis algorithms to analyze the near-infrared image information.

[0011] According to an embodiment of the present utility model, the imaging system further comprises a test object, and the test object may be an implant.

[0012] According to an embodiment of the present invention, the test object is placed between the lighting system and the data acquisition system.

[0013] According to an embodiment of the present utility model, the laser is used to emit a Gaussian light beam; preferably, the laser is used to emit near-infrared light.

[0014] According to an embodiment of the present utility model, the wavelength of the near infrared light is 900-1200nm.

[0015] According to an embodiment of the utility model, the lighting system further comprises a clear aperture and a first convex lens sequentially located behind the laser. The function of the clear aperture is to convert the light waves emitted by the laser into a point light source. Preferably, the geometric size of the clear aperture is in the order of μm.

[0016] In the present invention, after the light wave emitted by the laser passes through the aperture, a light spot with a geometric size of μm is obtained. Compared with the geometric size of the entire near-infrared transmission-reflection modality fusion imaging system, the geometric size of the light spot can be ignored, so it is approximately regarded as a point light source.

[0017] In the utility model, the first convex lens is used to converge the point light source emitted by the clear aperture into a collimated plane wave. When the clear aperture is placed at the object focus of the first convex lens, the point light source can be converged into a collimated plane wave.

[0018] According to the implementation scheme of the utility model, the laser is directly connected to the light aperture through an optical fiber. The function of the optical fiber is to constrain the propagation direction of the light wave emitted by the laser. The light wave emitted by the laser can reach the light aperture after being constrained by the optical fiber.

[0019] In the utility model, the implant is an imaging model of the near-infrared transmission-reflection modality fusion imaging system, is a test object to be observed and imaged, and can be a living or ex vivo object, so as to obtain near-infrared image information of the implant, including its two-dimensional geometric information and one-dimensional depth information.

[0020] According to the implementation scheme of the utility model, the data acquisition system includes a first reflector, a second reflector, a second convex lens and an attenuation plate which are arranged in sequence; wherein the first reflector is located behind the first convex lens.

[0021] Preferably, the first reflector is located between the first convex lens and the test object.

[0022] According to an embodiment of the utility model, the information processing system includes a near-infrared imaging camera and a computer;

[0023] The near infrared imaging camera is located behind the data acquisition system, for example, the near infrared imaging camera is located behind the attenuation sheet in the data acquisition system;

[0024] The near infrared imaging camera is connected to a computer; the computer is used to provide image processing and analysis algorithms. Preferably, the near infrared imaging camera is directly connected to the computer via a data line.

[0025] In the utility model, the function of the first reflector is to change the propagation direction of the collimated plane wave so that the light beam is incident directly on the implant. The function of the second reflector is to change the propagation direction of the light wave so that the light beam is incident directly on the information processing system (such as a near-infrared imaging camera) to obtain a clear and appropriate imaging result. The function of the second convex lens is to converge the light wave and transmit the converged signal to the information processing system (such as a near-infrared imaging camera) to obtain a clear and appropriate imaging result. The attenuation plate is used to adjust the intensity of the light to ensure that the amount of light in the system is suitable for the imaging requirements. By adjusting the attenuation plate, the brightness of the light can be controlled to obtain a clear and appropriate imaging result, so that the appropriate light intensity signal is transmitted to the information processing system (such as a near-infrared imaging camera).

[0026] In the utility model, the first reflector, the second reflector, the second convex lens and the attenuation sheet together constitute a data acquisition system of a near-infrared transmission-reflection modality fusion imaging system, which is used to obtain near-infrared image information of an oral implant.

[0027] In the utility model, the function of the near-infrared imaging camera is to record the light spot morphology, which is used to record the near-infrared image information of the implant. The function of the data cable is to connect the near-infrared imaging camera and the computer, and transmit the signal from the near-infrared imaging camera to the computer. The function of the computer is to process the near-infrared image information of the implant and run the image processing and analysis algorithm. As the core of the information processing system, the computer is responsible for receiving, parsing, analyzing and processing the data transmitted from the data cable. The computer software implements the image processing and analysis algorithm and the modal fusion imaging technology to generate the final imaging result. The computer can also be used to store, manage and display imaging data, that is, the image generates the light spot morphology or the near-infrared image information of the implant.

[0028] The above-mentioned near-infrared imaging camera, data cable and computer together constitute an information processing system, which converts the image data collected from the implant into visual and useful information. The system can provide high-resolution, information-rich oral implant imaging results, including two-dimensional geometric information and one-dimensional depth information of the implant, providing an important diagnostic tool for medical and clinical applications.

[0029] Beneficial effects of the utility model:

[0030] The utility model realizes the detection of oral implant sites and bone defects around implants based on near-infrared transmission-reflection modality fusion imaging technology; based on the selection of near-infrared light source and near-infrared detector suitable for the oral cavity, it realizes the acquisition of clear images in the oral environment.

[0031] The imaging system of the utility model combines optical and medical knowledge, and is convenient, fast and radiation-free, bringing a more advanced, convenient, fast and safe imaging solution to the field of stomatology.

[0032] Specifically:

[0033] The utility model is convenient and adopts near-infrared transmission-reflection modality fusion imaging technology, does not require complicated pre-processing steps, and the imaging process is simple, making the evaluation of oral implants more convenient.

[0034] The utility model has the advantages of rapidity and uses near-infrared transmission-reflection modal fusion imaging technology, which has a fast imaging speed and is helpful to quickly carry out effective imaging examinations beside the dental chair, thus shortening the waiting time of patients and improving medical efficiency.

[0035] Compared with traditional X-ray and CT examinations, the utility model has no radiation, avoids the potential harm that may be caused by long-term exposure of patients and medical staff to radioactive examinations, and improves the safety of imaging.

[0036] The utility model has the characteristic of realizing multi-dimensional information acquisition, adopts multi-dimensional information acquisition technology, can simultaneously acquire two-dimensional geometric information and one-dimensional depth information of oral implants, and provides more comprehensive and detailed imaging data.

[0037] The utility model has high resolution and utilizes near-infrared transmission-reflection modal fusion imaging technology to achieve high-resolution oral implant detection and imaging, providing clearer and more detailed images.

[0038] The utility model is non-destructive and does not require physical contact or traumatic operation on oral tissue, thus effectively avoiding tissue damage and infection risks that may be caused by traditional means.

[0039] In summary, the equipment system designed by the utility model has the advantages of simple optical path structure, low system cost, no need for other special optical elements, and good device stability. At the same time, this system has not only achieved innovative breakthroughs at the technical level, but also provided stomatology with a safer and more efficient oral implant imaging solution in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a diagram of a near-infrared transmission-reflection modality fusion imaging system of the utility model;

[0041] Among them, 01, laser, 02, optical fiber, 03, light aperture, 041, first convex lens, 042, second convex lens, 051, first reflector, 052, second reflector, 06, implant, 07, attenuation plate, 08, near-infrared imaging camera, 09, data cable, 10, computer. DETAILED DESCRIPTION

[0042] The following will further describe the technical solution of the utility model in combination with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the utility model, and should not be interpreted as limiting the scope of protection of the utility model. All technologies implemented based on the above content of the utility model are included in the scope of protection of the utility model.

[0043] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0044] Example 1

[0045] A near-infrared transmission-reflection modality fusion imaging system, comprising an illumination system, an implant 06, a data acquisition system and an information processing system arranged in sequence;

[0046] The lighting system comprises a laser 01, an optical fiber 02, a light aperture 03, and a first convex lens 041 which are arranged in sequence;

[0047] The data acquisition system comprises a first reflector 051, a second reflector 052, a second convex lens 042 and an attenuation sheet 07 which are arranged in sequence;

[0048] The first reflector 052 is located between the first convex lens 041 and the implant 06 ; the second reflector 052 , the second convex lens 042 and the attenuation sheet 07 are sequentially arranged behind the implant 06 .

[0049] The information processing system includes a near-infrared imaging camera 08, a data line 09 and a computer 10 connected in sequence;

[0050] The near-infrared imaging camera 08 is located behind the attenuation plate 07 .

[0051] The above is an exemplary description of the implementation of the utility model. However, the protection scope of the utility model is not limited to the above implementation. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A near-infrared transmission-reflection modality fusion imaging system, characterized in that: The imaging system comprises an illumination system, a data acquisition system and an information processing system which are arranged in sequence; The lighting system includes a laser; The data acquisition system is used to collect near-infrared image information of the test object; The information processing system is used to provide image processing and analysis algorithms to analyze near infrared image information; The illumination system further comprises a clear aperture and a first convex lens located behind the laser.

2. The imaging system according to claim 1, characterized in that The laser is used to emit near-infrared light.

3. The imaging system according to claim 2, characterized in that The wavelength of the near infrared light is 900-1200nm.

4. The imaging system according to claim 3, characterized in that The laser is directly connected to the light aperture through an optical fiber.

5. The imaging system according to claim 1, characterized in that The data acquisition system comprises a first reflector, a second reflector, a second convex lens and an attenuation plate which are arranged in sequence; wherein the first reflector is located behind the first convex lens.

6. The imaging system according to claim 5, characterized in that: The information processing system includes a near infrared imaging camera and a computer; The near-infrared imaging camera is located behind the data acquisition system; The near infrared imaging camera is connected to a computer.

7. The imaging system according to claim 6, characterized in that The near infrared imaging camera is located behind the attenuation sheet in the data acquisition system.

8. The imaging system according to claim 6, characterized in that: The near infrared imaging camera is directly connected to the computer via a data line.

9. The imaging system according to claim 1, characterized in that: The imaging system further includes a test object, wherein the test object is an implant; The test object is placed between the lighting system and the data acquisition system.

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