CN115844440A - Knee joint image examination auxiliary device - Google Patents

Abstract

An image examination auxiliary device for knee joint comprises: a foot fixing frame; the knee joint support frame, the height-adjustable of knee joint support frame for adjust the knee joint for the height of inspection platform, the foot mount with the knee joint support frame all is connected with inspection platform. The knee joint image auxiliary examination device provided by the scheme of the invention can adjust the flexion angle of the knee joint and provide support for the knee joint.

Description

A knee joint image examination auxiliary device

technical field

The present disclosure relates to the technical field of knee joint image examination, and in particular to an auxiliary device for knee joint image examination.

Background technique

The knee joint is the largest and most complex bone joint in the whole body, and injuries to bones, ligaments, and soft tissues of the knee joint are relatively common and serious blunt and mechanical injuries in clinical practice. If the knee joint injury is not properly diagnosed in time and given targeted treatment, it may induce irreversible medical accidents such as knee joint instability, traumatic arthritis, and muscle atrophy. For example, occult fractures are affected by physiological and anatomical structures, leading to misdiagnosis or missed diagnosis, delaying the best time for treatment.

The accuracy rate of arthroscopy and diagnosis of knee joint injury is high. However, arthroscopy can cause unnecessary trauma, and its clinical application is limited. Imaging is the most commonly used method for clinical diagnosis of knee joint injuries. Although CT examination significantly improves the accuracy of diagnosis of knee joint injury, it provides an objective basis for early clinical treatment. However, CT examinations also tend to underestimate specialized physical examinations. In clinical CT examinations, knee joint injuries are often missed due to lack of standardized physical examinations.

In addition, in the clinical application of imaging, the posture of CT examination can only be lying down or standing, and the knee joint injury cannot be examined in the posture of normal life. Carry out X-ray, CT, MRI and other imaging examinations on the knee joint. At present, there is no fixed device to adjust and fix the flexion angle of the knee joint. As a result, the images obtained by the imaging examination do not meet the clinical requirements for the knee joint flexion angle or There are motion artifacts in the image, which makes the image quality low or requires multiple imaging, which affects the work efficiency and increases the unnecessary X-ray exposure dose of the patient.

Contents of the invention

The technical problem solved by the present invention is to provide a knee joint imaging auxiliary inspection device and a knee joint imaging auxiliary inspection method, which can adjust the knee joint flexion angle and provide support for the knee joint, and can be used for X-ray, CT, magnetic resonance, etc. Device for imaging of the knee joint.

In order to solve the above technical problems, an auxiliary device for knee joint imaging examination is characterized in that it includes: a foot fixation frame; a knee joint support frame, the height of which is adjustable for adjusting the knee joint The height of the platform; the foot fixing frame and the knee joint supporting frame are all connected with the inspection platform.

Optionally, the foot fixing frame includes a footrest unit and a rotating support frame; the footrest unit is used to accommodate the examinee’s feet; the rotation support frame is connected to the footrest unit for driving The foot unit rotates to bend the subject's legs at different angles.

Optionally, the position of the pedal unit is adjustable within a limited range relative to the rotating support frame.

Optionally, it also includes: a telescopic bracket, the telescopic bracket is connected to the foot fixing frame, and is used to adjust the movement of the foot fixing frame along the length direction of the inspection platform.

Optionally, a bladder is provided inside the pedal unit, and the bladder is used to accommodate fluid; the sole corresponding part and the heel corresponding part of the pedal unit are respectively provided with at least one bladder; the pedal unit The ankle counterpart is provided with at least two bladders.

Optionally, it also includes: a knee joint sleeve; the knee joint sleeve has an annular structure formed by a capsule, and the annular structure has an annular through hole capable of accommodating the knee joint; the capsule is used for containing fluid.

Optionally, at least two capsules are provided inside the capsule forming the annular structure of the knee joint sleeve, and the positions of the at least two capsules correspond to or are adjacent to the position of the patella of the knee joint.

Optionally, the outside of the annular structure formed by the capsule is wrapped by a helical PVC material.

Optionally, a pressure control system is also included; the bladder is connected to the pressure control system, and the pressure control system controls the volume of the fluid so as to control the pressure of the bladder on the subject's foot.

Optionally, it also includes: a hip fixation frame, the hip fixation frame is used to fix the position of the hip joint. Optionally, the rotating support frame is provided with an angle measuring tool for measuring the axis rotation of the rotating supporting frame relative to the table top perpendicular to the inspection platform; the knee joint supporting frame has a length measuring tool for measuring the rotation of the knee joint relative to the The height of the inspection platform; the rotating support frame also includes a length measuring tool for measuring the height of the pedal unit relative to the inspection platform.

The embodiment of the present invention also provides a knee joint image-aided examination method, which is characterized in that it includes: adjusting the angle of the foot fixing device, so that the adjusted angle is adapted to the deflection angle of the patient's foot; the patient's foot is placed on On the foot fixing frame, adjust the height of the foot fixing frame relative to the inspection platform; the knee joint is placed on the knee joint support frame, and adjust the height of the knee joint support frame relative to the inspection platform.

Optionally, the auxiliary inspection method further includes: adjusting the telescopic support connected to the foot fixing frame to move along the length direction of the inspection platform; connecting the patient's hip to the hip fixing frame.

Optionally, the auxiliary inspection method includes: calculating the knee joint according to the lifting height of the foot, the lifting height of the knee joint, the distance from the foot to the knee joint, the distance from the hip to the knee joint, the length of the thigh and the length of the calf of the patient. The flexion angle of the joint.

Optionally, the auxiliary inspection method includes: obtaining the target flexion angle of the knee joint; adjusting the lifting height of the foot, the lifting height of the knee joint, the distance from the foot to the knee joint, and the distance from the hip to the knee joint according to the target flexion angle of the target knee joint. At least one of the distances from the knee joint.

Optionally, the lifting height of the foot, the lifting height of the knee joint, the distance from the foot to the knee joint, the distance from the hip to the knee joint, the length of the thigh and the length of the calf of the patient are calculated from the pictures of the patient captured by the camera .

Optionally, at least one data information of the lifting height of the foot, the lifting height of the knee joint, the distance from the foot to the knee joint, the distance from the hip to the knee joint, the length of the thigh and the length of the calf of the patient is obtained by a length measurement tool Obtaining: according to the at least one data information obtained by the length measurement tool, correcting the data information calculated according to the patient picture captured by the camera to obtain the final data; calculating the knee joint flexion angle according to the final data.

Optionally, the foot fixing frame includes a pedal unit, and a bladder is arranged inside the pedal unit, and at least one bladder is respectively provided on the corresponding part of the sole of the pedal unit and the corresponding part of the heel, and the bladder is used for to hold the fluid.

Optionally, the auxiliary inspection method further includes: before the patient starts the examination, putting a knee joint sleeve on the knee joint of the patient; the knee joint sleeve has an annular structure formed by a capsule, The annular structure has an annular through hole capable of accommodating the knee joint; the bladder is used to accommodate fluid.

Optionally, at least two capsules are provided inside the capsule forming the annular structure of the knee joint sleeve, and the positions of the at least two capsules correspond to or are adjacent to the position of the patella of the knee joint.

Optionally, the bladder is connected to a pressure control system, and the pressure control system controls the volume of the fluid so that the bladder filled with the fluid fits the corresponding joint.

Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

1. Provide support for the knee joint and reduce the impact on image quality due to voluntary or involuntary movement of the patient.

2. It can adapt to different flexion angles of the knee joint according to the doctor's requirements.

3. This program is applicable to the difference in the length of the thigh and calf of different patients.

4. It can measure the flexion angle of the patient.

5. It can simulate the stress of the patient's knee joint or foot.

6. It can simulate the displacement of bones such as the patient's patella.

In summary, this program can not only assist in imaging examinations, improve the accuracy and success rate of imaging examinations, but also perform qualitative analysis on the flexion angle of the knee joint, the force of the knee joint or foot, and bone displacement, and improve clinical outcomes. diagnostic accuracy.

Description of drawings

Figure 1 is a diagram of the initial position of the knee joint image-assisted inspection device;

Figure 2 is a diagram of the application process of the knee joint imaging auxiliary inspection device;

Fig. 3 is a schematic diagram of the structure of the foot fixing frame;

Fig. 4 is a three-dimensional schematic diagram of a knee joint sleeve;

Fig. 5 is a schematic diagram of the anatomical structure of the knee joint sleeve;

Fig. 6 is a schematic flow chart of a knee joint image inspection method;

Figure 7 is a schematic diagram of knee flexion

Fig. 8 is a schematic flow chart of a method for controlling the fluid volume in the capsule in the imaging examination method of the knee joint.

In the attached picture:

100 is the inspection platform; 200 is the foot fixing frame; 300 is the knee joint sleeve; 400 is the knee joint support frame; 500 is the hip joint fixing frame; 600 is the fluid loading system; 700 is the pressure control system; 800 is the telescopic bracket; X is the X direction; Z is the Z direction; 205 is the rotating support frame; 210 is the pedal unit; 215 is the capsule body corresponding to the sole position; 220 is the capsule body corresponding to the heel position; A is the rotation center point; 301 is The capsule of the annular structure forming the knee joint sleeve; 302 and 303 are the capsules adjacent to or corresponding to the position of the patella.

Detailed ways

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application, and those skilled in the art can also apply the present application to other similar scenarios. Unless obvious from context or otherwise stated, like symbols in the drawings represent like constructions or operations.

It should be understood that "device", "unit" and "system" are used herein as a means of distinguishing between different assemblies, elements, parts, parts or assemblies, however, other words may be used if they serve the same purpose Replace the word with another expression.

As shown in the application and claims, words such as "a", "an" and "an" do not refer to the singular and may include the plural, unless the context clearly indicates an exception. Generally speaking, the terms "comprising" and "comprising" only suggest the inclusion of clearly identified steps or elements, and these steps or elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

In this application, a flow chart is used to illustrate the operations performed by the system of the embodiment of this application. It should be understood that the preceding or following operations are not necessarily performed in the exact order. Rather, various steps may be processed in reverse order or concurrently. At the same time, other operations can be added to these procedures, or one or more steps can be removed from these procedures.

Fig. 1 is a diagram of the initial position of the knee joint imaging auxiliary inspection device, and Fig. 2 is a diagram of the use process of the knee joint imaging auxiliary inspection device. The overall structure of the auxiliary inspection device will now be described according to Fig. 1 and Fig. 2 . The knee joint imaging auxiliary device protected by the present invention includes a foot fixing frame 200 , a knee joint supporting frame 400 , a hip joint fixing frame 500 , a fluid loading system 600 , a pressure control system 700 , and a telescopic bracket 800 . The examination platform 100 provides a supporting examination bed for the patient to lie down. The foot fixation frame, the knee joint support frame 400, and the hip joint support frame 500 are respectively fixedly connected with the examination platform 100. All the above-mentioned components are made of non-metallic materials. It will not adversely affect the image quality of image inspection using the principle of X-ray imaging. The knee joint support frame 400 can be designed as a trapezoidal or tapered planar support frame or a three-dimensional support frame. When the knee support frame 400 is designed as a planar support frame, the longest side of the support frame is fixedly connected to the inspection platform, and the shortest side of the knee joint support frame 400 is used to lift the patient's knee. When the knee joint support frame 400 is designed as a three-dimensional support frame, the surface with the largest area is fixedly connected with the inspection platform, and the surface with the smallest area is used to lift the patient's knee. The fixed connection method can be bolted connection or threaded connection, and the specific connection method is not limited, as long as the connection method of mechanical fixation can be realized. It can be seen from the position of the knee joint support frame 400 in FIGS. 1 and 2 that, preferably, the knee joint support frame 400 can be folded and laid flat on the inspection platform. The knee joint support frame 400 can also be accommodated and placed flatly in a built-in receiving groove of the inspection platform, so that there is no protrusion on the surface of the inspection platform. In order to cope with various demands on the position of the patient's knee joint in the impact examination, the present invention designs the knee joint support frame 400 as a height-adjustable device, and the telescopic arm of the knee joint support frame 400 can be designed as hydraulic drive, wire rope transmission, etc. Control it for height adjustment. The hip fixation frame 500 is slidably connected to the inspection platform 100, specifically, slide rails are set on the hip fixation frame 500, and slide blocks are installed on the inspection platform. The hip joint fixture 500 can also include a clamp, which is used to clamp the patient's hip; or both ends of the hip joint fixture 500 are provided with slide rails, and the two ends of the inspection platform 100 are correspondingly provided with sliders, and the hip joint is fixed The main part of the frame 500 is a cover body, which is controlled to slide on the inspection platform 100. Preferably, the cover body can be stretched or made of elastic material; A fixing method similar to that of a car safety belt, such as one end of the safety belt is slidably connected to one side of the hospital bed, and the other side of the hospital bed is slidably connected to a buckle, and the safety belt is telescopically connected to the buckle. The design of the above-mentioned hip joint fixation frame 500 is to fix the patient, making it inconvenient for the patient to maintain a posture during the examination, reducing motion artifacts during the imaging process, and improving image quality. The sliding connection between the hip joint fixing frame 500 and the examination platform 100 is to adapt to patients of different heights and improve the comfort of the patients during the process of body position fixation. The knee sleeve 300 is a wearable device for accommodating a patient's knee joint.

FIG. 3 shows a schematic structural view of the foot fixing frame 200 . The foot fixing frame 200 includes a pedal unit 210, a telescoping bracket 800, and a rotating support frame 205. The pedal units 210, 215 are capsules corresponding to the position of the sole of the foot, and 220 is a capsule corresponding to the position of the heel. The footrest unit 210 is used to accommodate the patient's feet. Preferably, the footrest unit 210 is in the shape of a boot, which can be made of non-metallic materials such as PVC (polyvinyl chloride) or rubber. The pedal unit 210 is slidably connected to the rotating support frame 205 , the rotating support frame 205 is fixedly connected to the inspection platform 100 , and the telescopic support 800 is fixedly connected to the rotating support frame 205 . The telescopic bracket 800, the inspection platform 100 and the rotating support frame 205 are fixedly connected to point A on the inspection platform. The rotating support frame 205 can rotate around point A to adapt to different flexion angles of the patient's knee joint. At the same time, the rotating support frame 205 can rotate around point A. parallel axes until the swivel support rests flat on the inspection platform. The telescopic bracket 800 can drive the rotating bracket 205 to move along the length direction of the inspection platform, cooperate with the knee joint support frame 400 to adjust the flexion angle of the patient's knee joint, and can also use the telescopic bracket 800 to drive the rotating bracket when the foot fixing frame is not in use 205 and the pedal unit 210 return to the end of the inspection platform 100, which does not affect the inspection of other organs or parts of the patient, and saves the trouble of disassembling the parts back and forth. The pedal unit 210 can be provided with capsules, which are respectively installed on the corresponding part of the heel and the corresponding part of the sole, and at least two capsules can be arranged on the corresponding part of the ankle, and the inside of the capsule is used to fill fluid, such as water or air. The device can assist imaging equipment in inspection, and can be used for inspection of knee extension, knee flexion, knee external rotation, knee internal rotation, and can also be used for image inspection of knee joint over-straightening 5-10 degrees.

4 and 5 are used to illustrate the structural features of the knee joint sleeve 300 . Knee sleeve 300 is a wearable device. The part wrapping the knee joint is a capsule 301 , which is a hollow annular body, and the interior of the capsule is used to fill fluid, such as water or air. The outside of the annular capsule is wrapped with a layer of helical PVC material to form the outer support body 304. The helical PVC material can not only realize knee bending, but also ensure that the pressure loaded on the water bladder is transmitted to the knee position. The interior of the annular capsule is not only used to contain fluid, but also includes at least two capsules 302 adjacent to or corresponding to the position of the patient's patella, and the at least two capsules 302 adjacent to or corresponding to the position of the patient's patella are used to wrap or position the patella, And the position of the capsule 302 adjacent to or corresponding to the position of the patient's patella is fixed in the annular capsule 301. When the patient wears it, he can pay attention to placing the capsule 302 at a position adjacent to or corresponding to the patient's patella for wrapping or positioning the patella. , the position adjacent to the patella may be 1-5 cm away from the patella. In order to help patients or doctors find the position of the capsule 302 in the capsule 301, the position of the capsule 302 can be marked on the outer support 304. The specific marking pattern is not limited. Preferably, it can be directly drawn on the outer support 304. The actual size and position of the 302 are displayed.

According to Fig. 1 to Fig. 5, the bladder in the foot immobilization device 200 and the bladder in the knee joint sleeve 300 are respectively connected with a fluid delivery pipeline, and the fluid delivery pipeline is connected with a fluid loading system 600 at the same time, and the fluid loading system 600 is connected to the pressure control system 700, wherein the signal transmission between the fluid loading system 600 and the pressure control system 700 can be wired transmission or wireless transmission.

Fig. 6 introduces the method of using the knee joint imaging aided examination device in the knee joint imaging aided examination.

The patient lies on the examination bed, puts the foot into the footrest unit, and adjusts the height of the foot fixing frame 200 , specifically, the height of the footrest unit 210 relative to the rotating support frame 205 can be adjusted. To adjust the height of the knee joint support frame 400, specifically, the length of the telescopic arm of the knee joint support frame 400 can be adjusted. Adjust the rotation angle of the rotating support frame 205 . Adjusting the telescopic bracket 800 drives the rotating bracket 205 to move along the length direction of the inspection platform. Through the above adjustment process, the knee joint flexion angle of the patient can be adjusted to meet the requirements for the knee joint flexion angle in imaging examination. The knee joint flexion angle may be a doctor's experience value, that is, the doctor manually adjusts the angle or height of each part according to the experience value, so that the flexion angle meets the doctor's requirements. An automatic system can also be designed for the above-mentioned height and angle adjustment. The doctor only needs to input the target flexion angle on the terminal interface, and the components with height adjustment and angle adjustment functions in the knee joint image-assisted inspection device can be automatically adjusted. Adjust the height and angle values to meet the target flexion angle.

Figure 7 is a schematic diagram of knee flexion. The knee joint lifting height H2 can be obtained through a length measuring tool installed on the knee joint support frame 400 , and the knee joint lifting height is the telescopic length of the telescopic arm on the knee joint support frame 400 . The lifting height Hi of the feet can be obtained by the length measuring tool installed on the contact surface of the rotating support frame 205 and the pedal unit 210, and the angle measuring tool is also installed on the rotating supporting frame 205, and the angle measuring tool can be installed on the rotating supporting frame 205 and the telescopic bracket. Between 800, it is used to measure the rotation angle of the axis of the rotating support frame 205 around the Z direction, and calculates the lifting height Hi of the feet according to the angle measuring tool and the length measuring tool on the rotating supporting frame 205, and the lifting height Hi of the feet can be from the heel position to Check the vertical distance of platform 100 . Calf length Li and thigh length Lj can be determined by obtaining patient information, such as direct acquisition through the hospital's HIS (Hospital Information System) system, or by obtaining patient height information and predicting it through a neural network model that calculates height, thigh length, and calf length. The training data of the neural network model is the height, thigh length, and calf length of multiple users. The input of the model is the height of the user, and the output is the thigh length and calf length. The neural network model can be a deep neural network (DNN), convolutional neural network Network (CNN), Recurrent Neural Network (RNN), Generative Adversarial Network (GAN). The distance Si from the knee joint to the pin and the distance Sj from the knee joint to the hip can be determined by setting the length gauge on the inspection platform 100. The connection points between the fixing frame 500 and the inspection platform 100 are respectively calculated. If there are multiple connection points at each connection point, it can be any one connection point, or the central point among all the connection points. B is the connection point between the knee support frame 400 and the inspection platform. Specifically, if there are multiple connection points, it may be any one connection point, or the central point among all the connection points. A is the connection point between the foot fixing frame 200 and the inspection platform. Specifically, if there are multiple connection points, it may be any one connection point, or the central point among all the connection points. Point C is the connection point between the hip fixation frame 500 and the inspection platform. If there are multiple connection points, it can be any one connection point, or the central point among all the connection points. The distance from B to A and the distance from C to B can be calculated respectively by setting a length measuring tool on the inspection platform 100, and the length measuring tool can be a scale or an infrared distance sensor. The distance Si from the knee joint to the foot and the distance Sj from the knee joint to the hip can be obtained through the above-mentioned various methods. The flexion angle of the knee joint M=P+Q, the calculation method is as follows:

make:

Knee joint bending angle S=A+B.

Using the calculation formula of the above-mentioned knee joint flexion angle, design the knee joint flexion angle calculation software, which can quickly calculate or simulate the motion of the human knee joint. At the same time, according to the height and distance to be measured in the formula, a length measuring tool can be set at the corresponding position. The length measuring tool can be an infrared distance sensor. Through the height information and distance information fed back by the sensor, the patient can be calculated in real time according to the knee joint flexion angle calculation software. The knee joint flexion angle can also be automatically adjusted according to the target knee joint flexion angle input by the doctor, at least one of the height of the foot lift, the height of the knee joint lift, the distance from the foot to the knee joint, and the distance from the hip to the knee joint can be automatically adjusted.

According to the above formula for calculating knee flexion angle, the required data information: foot lift height, knee lift height, distance from foot to knee joint, distance from hip to knee joint, thigh length and calf length of the patient The acquisition method may also include: setting marker points on the inspection platform, capturing photos including at least the patient’s hip to feet and the marker points on the inspection platform through the camera, or directly obtaining photos including the patient’s whole body information and the marker points on the inspection platform, Input the photo into the neural network model, the neural network model can extract the patient's joint position information, and calculate the distance from the foot to the knee joint, the distance from the hip to the knee joint, the patient's thigh length and calf length. The lifting height of the foot and the lifting height of the knee joint can also be calculated according to the position information of the patient's joint position and the positional relationship of the marked points of the inspection platform. The method of automatically acquiring the data in the calculation formula of the knee joint flexion angle can improve the speed and accuracy of the calculation of the knee joint flexion angle. At the same time, at least one piece of data information can be measured according to the length measuring tool and the height measuring tool, such as the lifting height of the foot, the lifting height of the knee joint, the distance from the foot to the knee joint, the distance from the hip to the knee joint, the length of the thigh and the length of the calf of the patient , compared with the corresponding data obtained by the neural network calculation, correcting the joint point position information extracted from the photo through the neural network can reduce the error caused by the distortion of the camera and make the measurement result more accurate. The above correction process can occur in the neural network. During the network model training process, the position information of the joint points extracted by the trained neural network model is the data obtained after eliminating the distortion of the camera.

Fig. 8 is a schematic flow chart of the method for controlling the volume of fluid in the capsule in the image examination method of the knee joint. The purpose of controlling the volume of fluid in the capsule is to quantitatively estimate the magnitude of the external force on the knee joint and the displacement distance of the joint. Improve the accuracy of diagnosis of knee bone, ligament and soft tissue injuries and reduce the rate of misdiagnosis and missed diagnosis. Specifically, referring to FIG. 3 , a capsule body can be provided inside the pedal unit 210, and the capsule body can be installed on the corresponding part of the heel and the corresponding part of the sole of the foot, and at least two capsule bodies can also be provided on the corresponding part of the ankle. For filling fluid, such as water or air, the above-mentioned bladder is connected with a fluid delivery pipeline, and the fluid delivery pipeline is connected to the fluid loading system 600 at the same time, and the fluid loading system 600 is connected to the pressure control system 700, and the fluid loading system 600 and the pressure control system 700 can be divided into One-piece design, can also be integrated in a device, the device can achieve fluid loading function and pressure control function. The pressure control device 700 outputs a pressure value, converts the pressure value into an electrical signal and transmits it to the fluid loading system 600, and the fluid loading system 600 converts the received electrical signal into a digital signal, and inputs the corresponding volume of fluid into the bladder. Fluid loading system 600 and pressure control system 700 respectively fill each balloon with fluid. Specifically, filling the capsules of the corresponding part of the ankle, the corresponding part of the heel and the corresponding part of the sole of the foot with fluid respectively can make the patient's foot and ankle be fixed in the foot fixing frame 200 without damage, reduce the pain of the patient, and improve the The fitting degree of the patient's foot and the ankle fixation frame 200 improves the comfort of the patient's examination. One capsule can be provided on both sides of the ankle joint of the ankle, or four capsules can be provided along the circumferential direction of the ankle. Fill the capsules of the corresponding part of the heel and the corresponding part of the sole of the foot with fluid. When the patient feels pain or discomfort, stop filling the fluid and continue to fill the capsule of the corresponding part of the ankle with fluid. When the patient feels pain or discomfort, stop filling the fluid. Fluid The filling rate of the doctor is freely configurable. Record the pressure value corresponding to the fluid filling volume in each capsule, and the magnitude of the external pressure on the corresponding part can be obtained. According to the pressure difference of multiple fluid-filled capsules at the corresponding part of the ankle, the displacement distance of the ankle joint can be calculated. Specifically, the relationship between the pressure difference and the displacement distance can be drawn according to the pressure difference on both sides or multiple sides of the ankle joint. According to the above relationship diagram and the pressure difference on the patient's ankle joint, the displacement distance and displacement direction of the ankle joint are obtained.

Knee sleeve 300 is a wearable device. The part wrapping the knee joint is a capsule 301 , which is a hollow annular body, and the interior of the capsule is used to fill fluid, such as water or air. The outside of the annular capsule is wrapped with a layer of helical PVC material to form the outer support body 304. The helical PVC material can not only realize knee bending, but also ensure that the pressure loaded on the water bladder is transmitted to the knee position. The interior of the annular capsule is not only used to contain fluid, but also includes at least two capsules 302 adjacent to or corresponding to the position of the patient's patella, and the at least two capsules 302 adjacent to or corresponding to the position of the patient's patella are used to wrap or position the patella, And the position of the capsule 302 adjacent to or corresponding to the position of the patient's patella is fixed in the annular capsule 301. When the patient wears it, he can pay attention to placing the capsule 302 at a position adjacent to or corresponding to the patient's patella for wrapping or positioning the patella. . The above-mentioned capsule is connected with a fluid delivery pipeline, and the fluid delivery pipeline is connected to the fluid loading system 600 at the same time, and the fluid loading system 600 is connected to the pressure control system 700. The fluid loading system 600 and the pressure control system 700 can be designed separately or integrated in one In the device, the device can realize fluid loading function and pressure control function. The pressure control device 700 outputs a pressure value, converts the pressure value into an electrical signal and transmits it to the fluid loading system 600, and the fluid loading system 600 converts the received electrical signal into a digital signal, and inputs the corresponding volume of fluid into the bladder. Fluid loading system 600 and pressure control system 700 respectively fill each balloon with fluid. Specifically, fill fluid into the annular capsule 301 so that the annular capsule closely fits the patient's knee joint, and an infrared distance sensor can be set on the annular capsule, and according to the feedback result of the infrared distance sensor, it can be determined The fitting degree of the knee joint makes the patient's knee joint fixed in the knee joint sleeve 300 , reduces the pain of the patient, improves the fit between the patient's knee joint and the knee joint sleeve 300 , and improves the comfort of the patient's examination. Fill fluid into at least two bladders placed adjacent to or corresponding to the patient's patella, stop filling fluid when the patient feels pain or discomfort, and the fluid filling rate can be freely configured by the doctor. Record the pressure value corresponding to the fluid filling volume in each capsule, and the magnitude of the external pressure on the corresponding part can be obtained. According to the pressure difference of multiple fluid-filled bladders adjacent to or corresponding to the position of the patient's patella, the displacement distance of the patella can be calculated. Specifically, the pressure difference and the displacement distance can be plotted according to the pressure differences on both sides or multiple sides of the patella. relation chart. According to the relationship diagram above and the pressure difference on the patient's patella, the displacement distance of the patella is obtained.

Although the present invention is disclosed in light of the above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (11)

1. A knee joint image examination auxiliary device, characterized in that, comprising: foot mount; Knee joint support frame, the height of the knee joint support frame is adjustable, and is used for adjusting the height of the knee joint relative to the inspection platform; Both the foot fixing frame and the knee joint supporting frame are connected with the inspection platform. 2. The knee joint image examination auxiliary device according to claim 1, wherein the foot fixing frame includes a pedal unit and a rotating support frame; The foot unit is used to accommodate the feet of the subject; The rotating support frame is connected to the foot pedal unit, and is used to drive the foot pedal unit to rotate so as to bend the legs of the subject to different angles. 3 . The knee joint imaging auxiliary device according to claim 2 , wherein the position of the pedal unit is adjustable within a limited range relative to the rotating support frame. 4 . 4. The knee joint image examination auxiliary device according to claim 3, characterized in that: The rotating support frame is provided with an angle measuring instrument, which is used to measure the rotation of the rotating support frame relative to the axis perpendicular to the table top of the inspection platform; The knee joint support frame has a length measuring tool for measuring the height of the knee joint relative to the inspection platform; the rotating support frame also includes a length measuring tool for measuring the height of the foot pedal unit relative to the inspection platform. 5. The knee joint image examination auxiliary device according to claim 2, characterized in that, a bladder is arranged inside the pedal unit, and the bladder is used to accommodate fluid; the corresponding part of the sole of the pedal unit and The heel counterparts are each provided with at least one bladder; the ankle counterparts of the pedal unit are provided with at least two bladders. 6. The knee joint image examination auxiliary device according to claim 1, further comprising: knee sleeve; The knee joint sleeve has an annular structure formed by a capsule, and the annular structure has an annular through hole capable of accommodating the knee joint; The bladder is used to contain fluid. 7. The knee joint image examination auxiliary device according to claim 6, characterized in that, at least two capsules are arranged inside the capsule forming the annular structure of the knee joint sleeve, and the at least two capsules The position corresponds to or is adjacent to the position of the patella of the knee joint. 8 . The auxiliary device for knee joint image examination according to claim 6 , wherein the outer portion of the annular structure formed by the capsule is wrapped by a helical PVC material. 8 . 9. The knee joint image examination auxiliary device according to any one of claims 5 to 8, further comprising a pressure control system; the bladder is connected to the pressure control system, and the pressure control system controls the pressure of the fluid The volume of the bladder thereby controls the pressure of the bladder on the subject's foot. 10. The knee joint image examination auxiliary device according to claim 1, further comprising: The hip fixing frame is used for fixing the position of the hip joint. 11. The knee joint image examination auxiliary device according to claim 1, further comprising: A telescopic bracket, the telescopic bracket is connected to the foot fixing frame, and is used to adjust the movement of the foot fixing frame along the length direction of the inspection platform.

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