Teenager idiopathic scoliosis screening system and screening method

Abstract

The invention provides a teenager idiopathic scoliosis screening system and screening method. The teenager idiopathic scoliosis screening system comprises a shooting darkroom and an operation table, the shooting darkroom is a small three-dimensional closed space adaptive to the forward bending posture of the teenager, the top of the shooting darkroom is an arc top, the side wall of the shooting darkroom is provided with an interaction panel with an instruction input function, and the ground is provided with a limiting mark for standardizing the standing position and posture of the teenager; a shooting device capable of moving along a preset track is carried on the inner side of the arc top, the shooting device comprises a three-dimensional shape acquisition module, shape data and height information of the spine surface are acquired in a non-contact mode, and scoliosis screening is completed; the operation table is electrically connected with the shooting darkroom and used for executing manual parameter configuration, checking shot images in real time, storing screening data and controlling starting and stopping of the whole screening process. Through cooperative work of the innovatively designed shooting darkroom and the operation table, and in combination with an optical triangulation principle and an automatic control technology, AIS early screening with safety, convenience, privacy protection and basic level adaptability is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinal detection, in particular to a juvenile idiopathic scoliosis screening system and a screening method. BACKGROUND

[0002] Juvenile idiopathic scoliosis (AIS) is a three-dimensional spinal deformity disease that occurs frequently during adolescence. It is insidious and progresses rapidly. If not timely intervention, it may cause irreversible consequences such as severe spinal deformity and impaired heart and lung function, seriously affecting the physical and mental health of adolescents. Early screening is the key to reducing its harm, but the existing technology has obvious shortcomings in safety, convenience, privacy protection and grassroots adaptability.

[0003] In the traditional screening method, the Adams forward bending test is simple to operate but highly subjective, relying on the experience of the examiner, and has a low accuracy rate and is prone to missed diagnosis. Although X-ray examination is the "gold standard" for clinical diagnosis and can accurately determine the degree of lateral curvature, it has the risk of ionizing radiation and is not suitable for large-scale screening of adolescents. In addition, it is high in cost and difficult to promote in the grassroots. In terms of other technologies, ultrasonic screening requires the application of coupling agent, which is complicated to operate and relies on professional interpretation, increasing the difficulty of grassroots application. Although optical technology has been tried, the existing device structure is complex, the degree of automation is low, and it relies on manual intervention, which cannot meet the demand of large-scale and rapid screening in school and other scenes. In addition, in the existing screening, the examinee often needs to expose the body or be directly observed in a public environment, and the lack of privacy protection leads to resistance, reducing the compliance of screening. Due to the lack of equipment and professionals in the grassroots, the complexity of the operation of the existing device further restricts the coverage and efficiency of early screening of AIS. Therefore, it is an urgent problem to develop an AIS system that has safety, convenience, high automation, and can protect privacy and adapt to large-scale screening in the grassroots. SUMMARY

[0004] In order to solve all or part of the problems of the prior art, the present application provides a juvenile idiopathic scoliosis screening system and a screening method, which realizes early screening of AIS with safety, convenience, privacy protection and grassroots adaptability through the cooperative work of the shooting darkroom and the operation table designed by innovation, combined with the principle of optical triangulation and automatic control technology.

[0005] To achieve the above purpose, the present application provides the following technical solutions: A juvenile idiopathic scoliosis screening system, comprising: a shooting darkroom and an operation table; The shooting darkroom is a small three-dimensional closed space suitable for the forward bending posture of adolescents, the top of which is provided with a circular arc top, the side wall is provided with an interactive panel with instruction input function, and the ground is provided with a limiting mark for regulating the standing position and posture of the examinee; the inside of the circular arc top is provided with a shooting device capable of moving along a preset track, the shooting device comprising a three-dimensional topography acquisition module for non-contact acquisition of the topography data and height information of the spine surface to complete the scoliosis screening. The operation table and the shooting darkroom are electrically connected through wired or wireless mode for performing manual parameter configuration, real-time viewing of shooting images, storage of screening data and control of the start and stop of the whole screening process.

[0006] The shooting device further comprises a guide rail mounted on the circular arc top and in a circular arc shape to adapt to the spine topography after the forward bending of adolescents; the three-dimensional topography acquisition module is mounted on the guide rail and specifically comprises a vision unit and a light source; the vision unit and the light source are connected through a support, and the support is drivingly connected with the guide rail through a driver to drive the vision unit and the light source to move along the guide rail.

[0007] The middle part of the support is provided with the vision unit, and one light source is symmetrically arranged on the left and right sides of the support, the light projection directions of the two light sources form a preset included angle, and the preset included angle ranges from 15° to 30°.

[0008] The shooting device works based on the optical triangulation principle: the light source projects linear light to the back of the examinee, the linear light is deformed due to the height difference of the back surface of the examinee; the vision unit acquires the deformed linear light image from a preset angle, combines the baseline distance between the vision unit and the light source, the focal length of the vision unit and the pixel displacement amount of the linear light in the image, and calculates the three-dimensional coordinates of each point on the back surface of the examinee through the trigonometric function; a plurality of sets of three-dimensional coordinate data are integrated through an image stitching algorithm to form a continuous three-dimensional topography model of the spine surface.

[0009] The light source is a Class 1 or Class 2 level laser with a wavelength of 400-700 nm; the power of the Class 1 level laser is below 0.2 mW, and the power of the Class 2 level laser is 0.2-1 mW.

[0010] The driver is a stepper motor with a step angle of 1.8°, which runs in a "small step high frequency" mode: the displacement distance of each step is 10-30 mm, and after completing each displacement, it stays for 5-30 ms, and synchronously triggers the vision unit to shoot 1 frame of light image; the moving time of the vision unit and the light source along the guide rail for the whole stroke is 3-10 seconds, during which 50-200 frames of light images can be acquired.

[0011] The interactive panel comprises a touch screen, a voice player and a state indicating lamp, the touch screen is used for displaying operation instructions, the voice player can play pre-recorded guiding voice, and the state indicating lamp indicates the states of standby, running and abnormality through different colors; the interactive panel automatically detects the standing state of the examinee through an infrared sensor and synchronously triggers the reset initialization of the visual unit and the light source.

[0012] The operation table comprises a host computer, a display and an input device; the host computer is internally provided with an image stitching algorithm, the algorithm integrates multiple light images into a continuous three-dimensional spinal surface topography based on SIFT feature point matching technology; the display is a touch screen, and supports the medical staff to review the image quality through the input device, when the image definition is lower than a preset threshold or there is a posture deviation, an automatic re-shooting process can be triggered, and the secondary acquisition is completed through the voice guidance of the interactive panel.

[0013] The inner wall of the shooting darkroom is pasted with sound-absorbing cotton material, so as to reduce echo interference during voice interaction; a photoelectric sensor is arranged at the entrance of the darkroom, and the entrance prompt lamp is automatically turned off after detecting that the examinee completely enters, so as to prevent external light interference on shooting.

[0014] The application further provides a screening method for adolescent idiopathic scoliosis, which is applied to the system and comprises the following steps. Step one: the examinee takes off the upper garment and prepares to enter the shooting darkroom; Step two: the examinee enters the darkroom in a forward bending posture, stands in a standard forward bending posture through the ground limiting mark, the interactive panel automatically triggers voice guidance, and the reset initialization of the visual unit and the light source is synchronously completed; Step three: after the system is started, the visual unit and the light source are driven to run along the circular arc guide rail, the visual unit synchronously collects one frame of laser line topography image for each displacement of the stepping motor, and the guide rail full stroke scanning is completed within several seconds; Step four: after shooting is completed, the operation table computer automatically executes the image stitching algorithm to generate a three-dimensional spinal surface topography; Step five: the examinee leaves the darkroom and puts on clothes after the voice prompt of the darkroom indicates that the screening is completed.

[0015] The application has at least the following beneficial effects: 1. The system uses Class 1 or Class 2 level laser as light source, where Class 1 laser power is controlled below 0.2mW and Class 2 laser power is 0.2-1mW, both belong to the safe category of non-ionizing radiation, completely avoiding the radiation risk of traditional X-ray examination, especially suitable for large-scale screening of adolescent groups. At the same time, based on the principle of optical triangulation, through the symmetrical setting of double light sources (projection angle 15°-30°) and the cooperation of visual units, combined with the high-precision control of stepper motor 1.8° and the "small step high frequency" acquisition mode (each step displacement 10-30mm, stay 5-30ms), 50-200 dense images can be obtained within 3-10 seconds, and after splicing by SIFT feature point matching algorithm, a millimeter-level precision spine surface three-dimensional topography model can be constructed, which can accurately capture the subtle changes of scoliosis and provide reliable data support for early intervention.

[0016] 2. The operation threshold is reduced through multiple automation design, the infrared sensor of the interaction panel can automatically detect the positioning of the examinee and trigger the initialization of the equipment, and the voice player provides standardized guidance throughout the process. During the shooting process, the three-dimensional topography acquisition module moves along the circular arc guide rail automatically driven by the stepper motor without human intervention. The main machine of the operation table automatically completes image splicing and data storage, and medical staff only need to perform simple quality review through the touch screen and trigger automatic re-shooting if necessary. This "self-service of examinee + automatic processing of system" mode controls the single-person screening time within a few minutes, and the device structure is compact and easy to operate, effectively solving the problem of relying on professional personnel in traditional technology and difficult to promote in campus and other grassroots scenes, meeting the needs of large-scale screening.

[0017] 3. The shooting darkroom is an independent space, which cooperates with the whole process of automatic operation (without direct observation or contact of human), maximizes the reduction of privacy concerns caused by the exposure of examinee's body. The sound-absorbing cotton on the inner wall of the darkroom reduces the echo of voice interaction, and the entrance photoelectric sensor automatically turns off the prompt light to isolate the outside view, further enhancing the safety of the examinee. This careful protection of the privacy of adolescents can effectively reduce the screening avoidance caused by resistance and improve the participation of group screening, creating favorable conditions for the early detection and intervention of AIS. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0019] Fig. 1 It is a structure schematic diagram of a juvenile idiopathic scoliosis screening system according to an embodiment of the present application.

[0020] Fig. 2 It is a structure schematic view of a shooting device in a juvenile idiopathic scoliosis screening system.

[0021] Fig. 3 It is a spine shooting graph of a juvenile idiopathic scoliosis screening system.

[0022] Reference signs: 1, shooting darkroom; 2, operation table; 3, arc top; 4, interactive panel; 5, limiting mark; 6, shooting device; 601, guide rail; 602, visual unit; 603, light source; 604, support. DETAILED DESCRIPTION

[0023] The technical solutions in the specific embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] In the embodiments of the present application, reference is made to Figs. 1 to 3 As shown in the drawings, a juvenile idiopathic scoliosis (AIS) screening system is provided, aiming to solve the problems of insufficient safety, complicated operation, lack of privacy protection and poor adaptability to grassroots in the existing screening technology. Through the combination of optical technology and automation design, the AIS screening system realizes non-contact, high convenience and strong privacy protection, especially suitable for grassroots scenes such as schools.

[0025] The juvenile idiopathic scoliosis screening system provided by the present application comprises a shooting darkroom 1 and an operation table 2, which are electrically connected through wired (such as Ethernet, USB) or wireless (such as Wi-Fi, Bluetooth) mode, forming a cooperative screening unit.

[0026] The shooting darkroom 1 is a small three-dimensional closed space (for example, the size can be set to 1.5-2m in length, 0.8-1.2m in width, and 1.8-2.2m in height) suitable for the forward bending posture of adolescents. Its core function is to provide a standardized environment for collecting the surface topography of the spine, avoid external light interference, and protect the privacy of the examinee. The top part is designed with a circular arc top 3, and the radius can be set according to the physiological curvature of the adolescent's forward bending posterior spine (for example, the radius is 0.8-1.2m), which is suitable for the natural bending trajectory of the spine from the cervical spine to the lumbar spine, ensuring that the shooting device 6 can fully cover the spine area. The side wall is equipped with an interactive panel 4 with instruction input function, integrating a touch screen, a voice player and a status indicator light. Among them, the touch screen is used to display operation instructions (such as "please keep the forward bending posture") and device status; the voice player pre-stores standardized guide voice (such as "please align the toes with the ground mark"), which guides the examinee to complete the posture adjustment through acoustics; the status indicator light can display three colors: green for "standby", yellow for "running", and red for "abnormal". The interactive panel 4 can be equipped with an infrared sensor, which can automatically detect whether the examinee is in position and trigger the reset initialization of the shooting device 6. The ground is provided with a limiting mark 5 (such as a footprint contour line and a toe alignment line) to standardize the examinee's standing position and forward bending angle, ensure the uniformity of the shooting posture of different examinees, and reduce the measurement error caused by posture differences. The inner wall of the darkroom is pasted with sound-absorbing cotton to reduce echo interference when the voice is played; a photoelectric sensor can be installed at the entrance, which automatically turns off the entrance prompt light when it detects that the examinee has completely entered, avoiding external light from entering and affecting image collection.

[0027] The photographing device 6 is installed inside the arc top 3, and is used for non-contact acquisition of three-dimensional topographic data of the spine surface, and includes a guide rail 601 and a three-dimensional topographic acquisition module. The guide rail 601 is fixed to the arc top 3 in an arc shape, the arc degree is matched with the physiological curvature of the forward bending and rear spine of the teenager, and the length at least covers the area from the cervical vertebra to the sacral vertebra, thereby providing a movement track for the three-dimensional topographic acquisition module. The three-dimensional topographic acquisition module includes a vision unit 602 and a light source 603, and is installed on the guide rail 601 through a support 604 and a driver. The vision unit 602 is installed at the middle part of the support 604, an industrial camera is adopted, and the camera is used for acquiring a light image reflected by the back; in the embodiment, specifically, two light sources 603 are symmetrically arranged on the left and right sides of the vision unit 602 (with a distance of 10-20 cm), a Class 1 or Class 2 level laser (with a wavelength of 400-700 nm and a power of ≤1 mW) is adopted, wherein the power of the Class 1 laser can be set to be below 0.2 mW, and the power of the Class 2 laser can be set to be 0.2-1 mW; the light projection directions of the two light sources 603 form a preset included angle (such as 30°-60°), thereby ensuring that the linear light forms a clear deformation track on the back; the driver adopts a step motor and a traction device combined structure, the step motor outputs power and transmits the power to the traction device, and then drives the support 604 to move along the guide rail 601; the running mode is set to be “small step and high frequency”: each step displacement is 10-30 mm, 5-30 ms of staying is needed before triggering the vision unit 602 to shoot 1 frame of image, and the whole stroke moving time is controlled to be 3-10 seconds, thereby 50-200 frames of light images can be acquired. Further, the support 604 can be designed as a telescopic structure (for example, the telescopic range can be set to be 5-15 cm), the distance between the vision unit 602 and the back is adjusted manually or electrically, and teenagers with different heights are adapted.

[0028] The working process of the photographing device 6 can be designed as follows: after the detection starts, the three-dimensional topographic acquisition module integrated with the vision unit 602 and the light source 603 is started from the position corresponding to the head of the examinee, and is moved to the end of the guide rail 601 along the guide rail 601. The movement is accurately controlled by the traction device driven by the step motor, and the vision unit 602 shoots 1 laser line image reflecting the surface topography of the back synchronously every time the step motor completes 1 displacement. Benefited from the high displacement precision of the step motor, the densely collected laser line images are sequentially spliced through a simple algorithm, and a continuous three-dimensional model is constructed. Since the single frame imaging time of the vision unit 602 is only in millisecond level, and the step motor is in the running mode of “small step and high frequency”, the full stroke of the guide rail 601 can be quickly covered in a few seconds; and the shorter shooting time also makes the examinee more easily keep a stable posture, thereby the shooting efficiency and precision are considered, and the surface topography of the spine is efficiently and accurately acquired. The final shooting effect is shown in FIG. 8 (the splicing and grayscale processing have been completed, the laser line density is moderate, and the density can also be increased according to the requirement). Fig. 3

[0029] ​The operation table 2 provides a man-machine interactive interface for medical staff, including a host, a display and an input device (such as a keyboard and a mouse). The host is internally provided with an image splicing algorithm, based on SIFT feature point matching technology, to splice multiple light images into a continuous three-dimensional topography of the spine surface according to the order of image acquisition; meanwhile, screening data (such as three-dimensional coordinates, shooting time and ID of the examinee) are stored to support data export and statistical analysis. The display is a touch screen, which displays the shooting images and the splicing result in real time; the medical staff can review the image quality through the input device, and when the definition is lower than a preset threshold or the posture deviates, the automatic re-shooting process can be triggered to guide the examinee to re-shoot through the voice guidance of the interactive panel 4.

[0030] The system realizes non-contact measurement of the three-dimensional topography of the spine surface based on the optical triangulation principle, and the specific process is as follows: the light source 603 projects a linear laser onto the back of the examinee, and the laser line is deformed due to the height difference of the back surface (such as the protrusion on one side caused by scoliosis); the vision unit 602 acquires the deformed laser line image from a preset angle; the host calculates the three-dimensional coordinates (x, y, z) of each point on the back according to the baseline distance between the vision unit 602 and the light source 603, the focal length of the vision unit 602 and the pixel displacement of the laser line in the image, wherein the z-axis is the height information; the three-dimensional coordinate data of multiple images are integrated through the splicing algorithm to form a complete three-dimensional topography model of the spine surface, which is used to determine whether there is a scoliosis deformity.

[0031] The application also provides a screening method for adolescent idiopathic scoliosis, which is applied to the above-mentioned system and includes the following steps: Step one: the examinee first takes off his / her upper garment and prepares to enter the shooting darkroom 1 in a natural state; Step two: the examinee enters the darkroom in a forward bending posture in accordance with the requirements of the body position for spine screening, adjusts the standing position according to the ground limiting mark 5 and stands in a standard forward bending posture, at this time the interactive panel 4 automatically triggers voice guidance after detecting that the examinee is in position through an infrared sensor, and simultaneously controls the vision unit 602 and the light source 603 to reset to the starting position of the guide rail 601 to complete initialization; Step three: after the system is started, the vision unit 602 and the light source 603 are driven to move along the circular guide rail 601, wherein the vision unit 602 synchronously acquires one frame of laser line topography image every time the stepper motor completes one displacement, and the single-frame imaging is completed at a millisecond level, and in the whole process, the acquisition module moves along the guide rail 601 corresponding to the spine of the examinee, covers the whole stroke of the guide rail 601 and densely acquires multiple images within a few seconds; Step four: after shooting is completed, the host of the operation table 2 automatically calls the image splicing algorithm to orderly integrate multiple laser line images according to the order of image acquisition to generate a continuous and complete three-dimensional topography of the spine surface, and the whole process does not need manual intervention; Step five: If manual review is required, medical staff can call up the completed three-dimensional topographic map through the terminal of the operation table 2, judge the image quality and spinal shape abnormalities, and when detecting that there are shooting errors such as posture deviation and image blur, the automatic re-shooting process can be triggered through the operation table 2, and the system guides the examinee to complete the secondary collection through the voice player of the interactive panel 4. Step six: The final darkroom voice player prompts “screening is over”, and the examinee can leave and put on clothes.

[0032] The screening method greatly reduces the manual operation and workload of medical staff, reduces the dependence on manual subjective judgment, effectively improves the screening efficiency of campus and other primary scenes, and maximizes the privacy exposure of teenagers by means of darkroom closed environment and non-contact operation, thereby improving the cooperation degree of the examinee.

[0033] The core technical features of the present application include: optical triangulation principle, non-contact measurement through linear laser and industrial camera combination; arc guide rail 601 design adapts to the forward bending and posterior spinal shape of teenagers, ensuring full coverage of the collection range; “small step high frequency” collection mode considers data accuracy (≤1mm) and screening efficiency (single person time <1 minute); full-process automatic control, combined with voice guidance and posture specification design, reduces the operation threshold. The beneficial effects are: high safety, Class 1 / 2 laser (no radiation) is used to avoid X-ray ionizing radiation risk, no need to apply coupling agent, and reduce skin contact; convenient operation, automatic process reduces the dependence on professionals, suitable for large-scale screening in primary scenes such as schools; strong privacy protection, darkroom closed environment + no manual intervention, minimizes the exposure of examinee privacy, and improves the acceptance; accurate and efficient, standard posture control and image stitching algorithm, reduces measurement error, and meets the early screening needs. The present application provides an optimized solution for early screening of adolescent idiopathic scoliosis (AIS) by optical technology route, while ensuring safe and efficient screening, and taking into account the privacy protection of teenagers.

[0034] It should be noted that, for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A system for screening of adolescent idiopathic scoliosis, characterized in that, The utility model relates to a kind of screening system for adolescent scoliosis, including: Photographic darkroom and operation platform; The photographic darkroom is small-sized three-dimensional closed space adapted to the posture of adolescent forward bending, the top is provided with circular arc top, side wall is equipped with interactive panel with instruction input function, ground is equipped with limiting mark for standardizing the station and posture of examinee;The inside of the circular arc top is carried photographing device movable along preset track, and the photographing device includes three-dimensional topography acquisition module to obtain the topography data and height information of spine surface in non-contact mode, complete scoliosis screening; The operation platform is electrically connected with the photographic darkroom by wired or wireless mode, for executing artificial parameter configuration, real-time viewing photographic image, storing screening data and controlling start-stop of whole screening process.

2. The system of claim 1, wherein, The photographing device further includes guide rail, which is installed on the circular arc top and is arc-shaped to adapt to the spine topography after adolescent forward bending;The three-dimensional topography acquisition module is installed on the guide rail, specifically including vision unit and light source;The vision unit and the light source are connected through bracket, and the bracket is drivingly connected with the guide rail through driver to drive the vision unit and the light source to move along the guide rail.

3. The system of claim 2, wherein, The middle part of the bracket is provided with the vision unit, and one light source is symmetrically arranged on the left and right sides of the bracket, and the light projection directions of the two light sources form a preset included angle, and the preset included angle ranges from 15° to 30°.

4. The system of claim 3, wherein, The photographing device works based on optical triangulation principle: the light source projects linear light to the back of the examinee, the linear light is deformed due to the height difference of the back surface of the examinee, the vision unit acquires the deformed linear light image from a preset angle, combines the baseline distance between the vision unit and the light source, the focal length of the vision unit and the pixel displacement of the linear light in the image, and calculates the three-dimensional coordinates of each point on the back surface of the examinee through trigonometric function;A plurality of sets of three-dimensional coordinate data are integrated through image stitching algorithm to form a continuous three-dimensional topography model of the spine surface.

5. The system of claim 2, wherein, The light source is Class 1 or Class 2 level laser with wavelength between 400-700nm;The power of Class 1 level laser is below 0.2mW, and the power of Class 2 level laser is 0.2-1mW.

6. The system of claim 2, wherein, The driver is a stepper motor with a step angle of 1.8°, which operates in a "small step high frequency" mode: the displacement distance of each step is 10-30mm, and after completing each displacement, it stays for 5-30ms, and synchronously triggers the vision unit to shoot 1 frame of light image;The moving time of the vision unit and the light source along the guide rail for the whole stroke is 3-10 seconds, during which 50-200 frames of light images can be acquired.

7. The system of claim 1, wherein, The interactive panel includes touch screen, voice player and status indicator light, the touch screen is used to display operation instructions, the voice player can play pre-recorded guidance voice, and the status indicator light indicates "standby", "running" and "abnormal" states by different colors respectively;The interactive panel automatically detects the position state of the examinee through infrared sensor, and synchronously triggers the reset initialization of the vision unit and the light source.

8. The system of claim 1, wherein, The operation platform comprises a host computer, a display and an input device; the host computer is internally provided with an image stitching algorithm, which integrates multiple light images into a continuous three-dimensional spinal surface topography based on SIFT feature point matching technology; the display is a touch screen, which supports medical staff to review image quality through the input device, and when the image definition is lower than a preset threshold or there is a posture deviation, an automatic retaking process can be triggered to complete secondary acquisition through voice guidance of the interactive panel.

9. The system of claim 1, wherein, The inner wall of the shooting darkroom is pasted with sound-absorbing cotton material to reduce echo interference during voice interaction; a photoelectric sensor is arranged at the entrance of the darkroom, which automatically closes the entrance prompt light when detecting that the examinee has completely entered, preventing external light interference during shooting.

10. A method of screening for adolescent idiopathic scoliosis, applied to the system of any one of claims 1-9, characterized in that, The method comprises the following steps: Step one: the examinee takes off his / her upper garment and prepares to enter the shooting darkroom; Step two: the examinee enters the darkroom in a forward bending posture, stands in a standard forward bending posture through ground limiting marks, the interactive panel automatically triggers voice guidance, and the reset initialization of the visual unit and the light source is completed synchronously; Step three: after the system is started, the visual unit and the light source run along the circular arc guide rail linkage, and the visual unit synchronously collects one frame of laser line topography image for each displacement of the stepping motor, and the guide rail full stroke scanning is completed within a few seconds; Step four: after shooting is completed, the operation platform computer automatically executes the image stitching algorithm to generate a three-dimensional spinal surface topography; Step five: the darkroom voice prompts that the screening is completed, the examinee leaves and puts on clothes.

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