Method for acquiring parameters of mouth gag

Abstract

The invention relates to the field of oral medicine, in particular to a method for acquiring parameters of a mouth gag. The method comprises the steps of obtaining a sample oral cavity image set; dividing the sample oral cavity image set into a plurality of groups according to the oral cavity width of the sample oral cavity corresponding to each sample oral cavity image subset, wherein each group comprises a plurality of sample oral cavity image subsets; obtaining a first target relationship corresponding to the oral cavity width corresponding to each group according to the sample oral cavity image subset included in each group; obtaining a second target relationship corresponding to the oral cavity width corresponding to each group according to the sample oral cavity image subset included in each group; according to the first target relation corresponding to the oral cavity width corresponding to the target oral cavity, the second target relation corresponding to the oral cavity width corresponding to the target oral cavity, the tracheal muscle electric signal intensity variable quantity target value and the oral cavity internal space variable quantity target value, the tongue depressor length and the tongue depressor angle during interference on the target oral cavity are obtained. According to the invention, parameters of the mouth gag suitable for a patient during an oropharyngeal operation can be obtained.

Description

Technical Field

[0001] The present invention relates to the field of stomatology, and particularly to a method for obtaining the parameters of an oral opener. Background Art

[0002] When performing oropharyngeal surgery, an oral opener is often needed to assist the operation. The main function of the oral opener is to adjust the opening size of the patient's mouth and the size of the space inside the oral cavity. The oral opener includes a tongue depressor. By adjusting the length and angle of the tongue depressor, a better observation field of view can be provided for the doctor, which is beneficial to improving the accuracy and efficiency of the surgical operation. The oral cavities of different patients are of different sizes, and the sizes of the operation spaces required by the doctor during different oropharyngeal surgeries on the patients are also different. In the prior art, the length and angle of the tongue depressor suitable for the patient often rely on the doctor's experience judgment, which is relatively subjective, and there may be a situation where the length and angle of the tongue depressor judged by the doctor according to experience are not suitable for the patient. How to obtain the parameters of the oral opener suitable for the patient during oropharyngeal surgery is an urgent problem to be solved. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for obtaining the parameters of an oral opener to obtain the parameters of the oral opener suitable for the patient during oropharyngeal surgery.

[0004] According to the present invention, a method for obtaining the parameters of an oral opener is provided. The method includes the following steps:

[0005] S100, obtaining a sample oral image set; the sample oral image set includes several sample oral image subsets, and any sample oral image subset includes the image of the corresponding sample oral cavity without the interference of the oral opener and the images under different interference methods; the length of the tongue depressor and / or the angle of the tongue depressor of the oral opener corresponding to different interference methods are different; any image included in the sample oral image set is a CT image scanned from the side of the corresponding sample oral cavity.

[0006] S200, dividing the sample oral image set into several groups according to the oral width of the sample oral cavity corresponding to each sample oral image subset, and each group includes several sample oral image subsets; the oral width is the distance from the left wall of the oral cavity to the right wall of the oral cavity.

[0007] S300, obtaining the first target relationship corresponding to each group corresponding to the oral width according to the sample oral image subsets included in each group; the first target relationship is the relationship between the length of the tongue depressor, the angle of the tongue depressor, and the change amount of the tracheal muscle electrical signal intensity.

[0008] S400, obtaining the second target relationship corresponding to each group corresponding to the oral width according to the sample oral image subsets included in each group; the second target relationship is the relationship between the length of the tongue depressor, the angle of the tongue depressor, and the change amount of the internal oral cavity space.

[0009] The S500 obtains the length and angle of the tongue depressor when interfering with the target oral cavity according to the first target relationship corresponding to the oral width of the target oral cavity, the second target relationship corresponding to the oral width of the target oral cavity, the target value of the change amount of the tracheal muscle electrical signal intensity, and the target value of the change amount of the internal oral cavity space.

[0010] The present invention has at least the following beneficial effects compared with the prior art:

[0011] By obtaining a sample oral image set and grouping based on the oral width, the present invention respectively obtains the target relationships between the length and angle of the tongue depressor and the change amount of the tracheal muscle electrical signal intensity corresponding to different oral widths, and the target relationships between the length and angle of the tongue depressor and the change amount of the internal oral cavity space corresponding to different oral widths; the present invention quantifies the relationship between the mouth opener parameters and the change amount of the tracheal muscle electrical signal intensity, and quantifies the relationship between the mouth opener parameters and the change amount of the internal oral cavity space, provides a basis for determining the mouth opener parameters suitable for the target oral cavity, can determine the length and angle of the tongue depressor of the mouth opener suitable for the target oral cavity, and interfering with the target oral cavity based on the length and angle of the tongue depressor can obtain a better oropharyngeal surgical operation space and a better tracheal muscle state, which is beneficial to the smooth progress of oropharyngeal surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a flowchart of a method for obtaining mouth opener parameters provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0015] According to this embodiment, as Figure 1 shown, a method for obtaining mouth opener parameters is provided, and the method includes the following steps:

[0016] S100. Obtain a set of sample oral cavity images. The set of sample oral cavity images includes several subsets of sample oral cavity images. Any subset of sample oral cavity images includes an image of the corresponding sample oral cavity without the interference of an oral speculum and images under different interference methods. The length of the tongue depressor of the oral speculum corresponding to different interference methods is different and / or the angle of the tongue depressor is different. Any image included in the set of sample oral cavity images is a CT image scanned from the side of the corresponding sample oral cavity.

[0017] In this embodiment, the set of sample oral cavity images is P, and P = {P1, P2, …, P m , …, P M}, where P m is the m-th subset of sample oral cavity images, and the value range of m is from 1 to M, where M is the number of sample oral cavities; P m =(P m,0 , P m,1 , P m,2 , …, P m,n(m) , …, P m,N(m) ), where P m,0 is the image of the m-th sample oral cavity without the interference of an oral speculum, and P m,n(m) is the image of the m-th sample oral cavity under the corresponding n(m)-th interference method, and the value range of n(m) is from 1 to N(m), where N(m) is the number of interference methods corresponding to the m-th sample oral cavity.

[0018] In this embodiment, different sample oral cavities are the oral cavities of different people. The image of a sample oral cavity without the interference of an oral speculum is an image of the mouth of the sample oral cavity in a standard open state without external force. The standard open state refers to an open state where the distance between the edges of the upper and lower incisors reaches a preset distance, and the preset distance is a pre-set distance. For example, the preset distance is 4 cm. The image of a sample oral cavity under an interference method is an image after using an oral speculum to hold open the mouth of the sample oral cavity. In this embodiment, when using an oral speculum to interfere with a sample oral cavity, the internal space size and the tracheal muscle electrical signal intensity of the sample oral cavity will change. When using different interference methods to interfere with the same sample oral cavity, the change amount of the internal space of the sample oral cavity is different, and when using different interference methods to interfere with the same sample oral cavity, the change amount of the tracheal muscle electrical signal intensity is different. Among them, the change amount of the internal space of the sample oral cavity and the change amount of the tracheal muscle electrical signal intensity are both relative to the internal space size and the tracheal muscle electrical signal intensity of the sample oral cavity in the natural state.

[0019] In this embodiment, the lengths and / or angles of the tongue depressors of the mouth openers corresponding to different interference methods are different, that is: the lengths of the tongue depressors of the mouth openers corresponding to different interference methods are different, or the angles of the tongue depressors are different, or both the lengths and angles of the tongue depressors are different. Those skilled in the art know that both the length and angle of the tongue depressor in the mouth opener can be adjusted. Different lengths of the tongue depressor can change the range in which the tongue is depressed by the tongue depressor, and different angles of the tongue depressor can change the amplitude in which the tongue is depressed by the tongue depressor, thereby changing the size of the internal oral cavity and the strength of the tracheal muscle electrical signal; Those skilled in the art know that any mouth opener in the prior art falls within the protection scope of the present invention. Optionally, the angle of the tongue depressor is the spatial orientation of the extension direction of the tongue depressor in the overall structure of the mouth opener, and the change in the angle of the tongue depressor is the change in the position and posture of the tongue depressor in the overall structure of the mouth opener.

[0020] In this embodiment, the number of interference methods corresponding to different sample oral cavities may be the same or different. It should be understood that the front of the oral cavity is the side where the mouth is located, and the side of the oral cavity is the left side or the right side of the oral cavity. Optionally, all the images included in P are CT images scanned from the right side.

[0021] S200, divide the sample oral image set into several groups according to the oral width of the sample oral cavity corresponding to each sample oral image subset, and each group includes several sample oral image subsets; the oral width is the distance from the left wall to the right wall of the oral cavity.

[0022] It should be understood that the oral widths corresponding to different sample oral cavities are different. Optionally, the oral width when the mouth of the sample oral cavity is in a standard open state without external force is determined as the oral width corresponding to the sample oral cavity. Optionally, the oral width when the mouth of the sample oral cavity is in a standard open state without external force is obtained by scanning the sample oral cavity from the front by CT.

[0023] In this embodiment, the sample oral image subsets included in the sample oral image set are grouped by a clustering method. The oral widths of the sample oral cavities corresponding to the sample oral image subsets in the same group are less different, and the oral widths of the sample oral cavities corresponding to the sample oral image subsets in different groups are more different. Those skilled in the art know that any clustering method in the prior art falls within the protection scope of the present invention. Optionally, the clustering method is k-means.

[0024] S300, obtain the first target relationship corresponding to the oral width of each group according to the sample oral image subsets included in each group; the first target relationship is the relationship between the length of the tongue depressor, the angle of the tongue depressor, and the change amount of the tracheal muscle electrical signal strength.

[0025] In this embodiment, the change in the tracheal muscle electrical signal intensity is related to the length and angle of the tongue depressor, and the tracheal muscle electrical signal intensity is one of the factors affecting oropharyngeal surgery. As a preferred specific implementation manner, S300 includes:

[0026] S310, obtaining the i-th sample oral image subset V included in the specified group i ; the specified group is any group obtained by dividing the sample oral image set, and the value range of i is from 1 to u, where u is the number of sample oral image subsets included in the specified group.

[0027] S320, based on V i,q and V i,0 to obtain the change amount θ of the tongue position angle of the corresponding sample oral cavity under the corresponding q-th interference method i ; the tongue position angle is the included angle between the back of the tongue and the bottom of the oral cavity, V i,q is the image of the corresponding sample oral cavity under the corresponding q-th interference method for V i,q , V i is the image of the corresponding sample oral cavity without the interference of the mouth gag for V i,0 , and the value range of q is from 1 to Q, where Q is the number of interference methods corresponding to the corresponding sample oral cavity of V i .

[0028] In this embodiment, when using a mouth gag to interfere with the sample oral cavity, the tongue position angle of the sample oral cavity will change; when using different interference methods to interfere with the same sample oral cavity, the change amount of the tongue position angle is different, and the corresponding change amount of the tracheal muscle electrical signal intensity is also different. <C

[0029] <00C00202>In this embodiment, the tongue position angle in V i,0 can be obtained based on V i,0 , and the tongue position angle in V i,q can be obtained based on V i,q . The difference between the tongue position angle in V i,q and the tongue position angle in V i,0 is the change amount θ of the tongue position angle of the corresponding sample oral cavity under the corresponding q-th interference method for V i . Optionally, by identifying the positions of the tip of the tongue and the middle of the tongue in V <000D029> i,q i,0 to obtain the first connection line between the tip of the tongue and the middle of the tongue, and determining the included angle between the first connection line and the plane of the bottom of the oral cavity in V i,0 as the first angle in V i,0 , by identifying the positions of the root of the tongue and the middle of the tongue in V i,0 to obtain the second connection line between the root of the tongue and the middle of the tongue, and determining the included angle between the second connection line and the plane of the bottom of the oral cavity in V i,0 as the second angle in V i,0 i,0i,0 The average value of the first angle and the second angle in is determined as V i,0 the tongue position angle in; by identifying V i,q the positions of the tip of the tongue and the middle of the tongue in to obtain the first connection line between the tip of the tongue and the middle of the tongue, and the first connection line and V i,q the included angle between the bottom plane of the oral cavity in is determined as V i,q the first angle in; by identifying V i,q the positions of the root of the tongue and the middle of the tongue in to obtain the second connection line between the root of the tongue and the middle of the tongue, and the second connection line and V i,q the included angle between the bottom plane of the oral cavity in is determined as V i,q the second angle in; for V i,q the average value of the first angle and the second angle in is determined as V i,q the tongue position angle in.

[0030] S330, according to θ i,q and the third target relationship corresponding to the oral cavity width of the specified group to obtain V i the change amount g of the tracheal muscle electrical signal intensity of the corresponding sample oral cavity under the corresponding qth interference mode i,q ; the third target relationship is the relationship between the change amount of the tongue position angle and the change amount of the tracheal muscle electrical signal intensity.

[0031] In this embodiment, the change amount of the tongue position angle in the third target relationship is the independent variable, and the change amount of the tracheal muscle electrical signal intensity is the dependent variable. By substituting θ i,q into the third target relationship corresponding to the oral cavity width of the specified group, the change amount g of the tracheal muscle electrical signal intensity can be obtained i,q .

[0032] As a specific implementation manner, the obtaining process of the third target relationship corresponding to the oral cavity width of the specified group includes:

[0033] S331, obtain the training data set H; H = {(δ1, e1), (δ2, e2),..., (δ j , e j ),..., (δ z , e z )}, where δ j and e j are respectively the change amount of the tongue position angle and the change amount of the tracheal muscle electrical signal intensity in the jth training data, and the oral cavity width corresponding to any training data is the oral cavity width corresponding to the specified group; the value range of j is from 1 to z, and z is the number of training data.

[0034] S332, determine the change amount of the tracheal muscle electrical signal intensity as the dependent variable, determine the change amount of the tongue position angle as the independent variable, and fit the training data included in H to obtain the third target relationship corresponding to the oral cavity width of the specified group.

[0035] Those skilled in the art are aware that any fitting method in the prior art falls within the protection scope of the present invention.

[0036] Based on S331 - S332, the third target relationship corresponding to the oral cavity width of the specified group can be accurately obtained.

[0037] S340, according to {G1, G2, …, G i , …, G u} to obtain the first target relationship corresponding to the oral cavity width of the specified group; G i is the set of change amounts of the tracheal muscle electrical signal intensity corresponding to V i , G i = {(L i,1 , β i,1 , g i,1 ), (L i,2 , β i,2 , g i,2 ), …, (L i,q , β i,q , g i,q ), …, (L i,Q , β i,Q , g i,Q )}, L i,q and β i,q are respectively the length of the tongue depressor and the angle of the tongue depressor corresponding to the q-th interference method of the sample oral cavity corresponding to V i .

[0038] As a specific embodiment, the method of curve fitting is used to obtain the first target relationship corresponding to the oral cavity width of the specified group, where the length of the tongue depressor and the angle of the tongue depressor are independent variables, and the change amount of the tracheal muscle electrical signal intensity is the dependent variable.

[0039] Based on S310 - S340, the relationship between the length of the tongue depressor, the angle of the tongue depressor and the change amount of the tracheal muscle electrical signal intensity can be accurately obtained; moreover, the change amount of the tracheal muscle electrical signal intensity of the sample oral cavity corresponding to V i in the corresponding q-th interference method can be obtained according to the image and the third target relationship, without actually measuring the tracheal muscle electrical signal intensity of the oral cavity sample, making the acquisition process of the first target relationship simpler.

[0040] S400, according to the subset of the sample oral cavity images included in each group, obtain the second target relationship corresponding to the oral cavity width of each group; the second target relationship is the relationship between the length of the tongue depressor, the angle of the tongue depressor and the change amount of the internal oral cavity space.

[0041] In this embodiment, the change amount of the internal oral cavity space is related to the length and angle of the tongue depressor, and the size of the internal oral cavity space is one of the factors affecting oropharyngeal surgery. As a preferred specific implementation manner, S400 includes:

[0042] S410, obtaining the i-th sample oral image subset V included in the specified group i ; The specified group is any group obtained by dividing M sample oral image subsets, and the value range of i is from 1 to u, where u is the number of sample oral image subsets included in the specified group.

[0043] S420, according to V i,q and V i,0 obtaining the change amount b of the internal oral cavity space of the corresponding sample oral cavity under the corresponding q-th interference method of V i ; V i,q is the image of the corresponding sample oral cavity under the corresponding q-th interference method of V i,q , V i is the image of the corresponding sample oral cavity without the interference of the mouth gag of V i,0 , and the value range of q is from 1 to Q, where Q is the number of interference methods corresponding to the corresponding sample oral cavity of V i . i

[0044] As a preferred specific implementation manner, S420 includes:

[0045] S421, obtaining the area a of the sample oral cavity region in V i,0 . i,0 .

[0046] Optionally, the area a of the sample oral cavity region in V i,0 is determined manually, or the sample oral cavity region in V i,0 is recognized based on a trained neural network model, and a i,0 is determined according to the sample oral cavity region in V i,0 recognized by the trained neural network model. Optionally, the training process of the neural network model includes: annotating the oral cavity regions in the sample images in the sample image set, and training the neural network model according to the annotation results. i,0 .

[0047] S422, obtaining the area a of the sample oral cavity region in V i,q . i,q .

[0048] Optionally, the area a of the sample oral cavity region in V i,q is determined manually, or the sample oral cavity region in V i,q is recognized based on a trained neural network model, and a i,qThe oral cavity area of the middle sample, and determine a according to the V recognized by the trained neural network model i,q in the middle sample oral cavity area i,q .

[0049] S423, according to a i,0 and a i,q obtain the internal space change amount b of the internal space change amount of the oral cavity corresponding to the middle sample oral cavity i,q . i,q .

[0050] As a specific implementation, b i,q =(a i,q -a i,0 )×d i ×r i,q , d i is the oral cavity width corresponding to the i-th sample oral cavity, r i,q is the scaling ratio corresponding to V i,q .

[0051] It should be understood that r i,q represents the ratio of the true size corresponding to one pixel to its size in V i,q .

[0052] Based on S421 - S423, it is possible to quickly estimate the internal space change amount of the oral cavity corresponding to the middle sample oral cavity in V i,q , which is beneficial to quickly obtain the internal space change amount b of the oral cavity corresponding to the sample oral cavity corresponding to V i under the q-th interference method i,q .

[0053] S430, according to {B1, B2, …, B i , …, B u} obtain the second target relationship corresponding to the oral cavity width of the specified group; B i is the set of internal space change amounts of the oral cavity corresponding to V i , B i ={(L i,1 , β i,1 , b i,1 ), (L i,2 , β i,2 , b i,2 ), …, (L i,q , β i,q , b i,q ), …, (L i,Q , β i,Q , b i,Q )}, L i,q and β i,q are respectively the V iThe length and angle of the tongue depressor corresponding to the q-th interference method corresponding to the corresponding sample oral cavity.

[0054] As a specific implementation, a curve fitting method is used to obtain the first target relationship corresponding to the oral cavity width of the specified group, where the length and angle of the tongue depressor are independent variables, and the change amount of the internal oral cavity space is the dependent variable.

[0055] Based on S410 - S430, the relationship between the length and angle of the tongue depressor and the change amount of the internal oral cavity space can be accurately obtained.

[0056] S500, obtain the length and angle of the tongue depressor when interfering with the target oral cavity according to the first target relationship corresponding to the oral cavity width of the target oral cavity, the second target relationship corresponding to the oral cavity width of the target oral cavity, the target value of the change amount of the tracheal muscle electrical signal intensity, and the target value of the change amount of the internal oral cavity space.

[0057] In this embodiment, the target value of the change amount of the tracheal muscle electrical signal intensity and the target value of the change amount of the internal oral cavity space are both known. Among them, the target value of the change amount of the tracheal muscle electrical signal intensity is the difference between the target value of the tracheal muscle electrical signal intensity and the tracheal muscle electrical signal intensity when the mouth of the target oral cavity is in the standard open state without external force. The target value of the tracheal muscle electrical signal intensity is preset, and it is the optimal value of the tracheal muscle electrical signal intensity of the target oral cavity during oropharyngeal surgery on the target oral cavity; the target value of the change amount of the internal oral cavity space is the difference between the target value of the internal oral cavity space and the internal oral cavity space when the mouth of the target oral cavity is in the standard open state without external force. The target value of the change amount of the internal oral cavity space is preset, and it is the optimal value of the internal oral cavity space of the target oral cavity during oropharyngeal surgery on the target oral cavity. Optionally, a sensor such as an electrode is used to obtain the tracheal muscle electrical signal intensity when the mouth of the target oral cavity is in the standard open state without external force, and a CT scan is used to obtain the size of the internal oral cavity space when the mouth of the target oral cavity is in the standard open state without external force.

[0058] As a specific implementation, S500 includes:

[0059] S510, substitute the target value of the change amount of the tracheal muscle electrical signal intensity into the first target relationship corresponding to the oral cavity width of the target oral cavity to obtain the first equation.

[0060] In this embodiment, the oral cavity width corresponding to the target oral cavity is known; optionally, the oral cavity width when the mouth of the target oral cavity is in the standard open state without external force is determined as the oral cavity width corresponding to the target oral cavity. Optionally, a CT scan is used to obtain the oral cavity width when the mouth of the target oral cavity is in the standard open state without external force from the front of the target oral cavity.

[0061] It should be understood that in the first equation, only the spatula length and the spatula angle are unknowns.

[0062] S520, Substitute the target value of the oral cavity internal space change amount into the second target relationship corresponding to the oral cavity width of the target oral cavity to obtain a second equation.

[0063] It should be understood that in the second equation, only the spatula length and the spatula angle are unknowns.

[0064] S530, Solve the first equation and the second equation, determine the spatula length obtained by the solution as the spatula length when interfering with the target oral cavity, and determine the spatula angle obtained by the solution as the spatula angle when interfering with the target oral cavity.

[0065] Based on S510 - S530, the spatula length and the spatula angle when interfering with the target oral cavity can be obtained.

[0066] In this embodiment, by obtaining a sample oral cavity image set and grouping based on the oral cavity width, the target relationships between the spatula length, the spatula angle and the change amount of the tracheal muscle electrical signal intensity corresponding to different oral cavity widths, and the target relationships between the spatula length, the spatula angle and the change amount of the oral cavity internal space corresponding to different oral cavity widths are obtained respectively; this embodiment realizes the quantification of the relationship between the mouth opener parameters and the change amount of the tracheal muscle electrical signal intensity, and realizes the quantification of the relationship between the mouth opener parameters and the change amount of the oral cavity internal space, provides a basis for determining the mouth opener parameters applicable to the target oral cavity, can determine the spatula length and the spatula angle of the mouth opener applicable to the target oral cavity, and based on the spatula length and the spatula angle, interfering with the target oral cavity can obtain a better oropharyngeal surgical operation space and a better tracheal muscle state, which is beneficial to the smooth progress of oropharyngeal surgery.

[0067] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should also understand that various modifications can be made to the embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A method for obtaining the parameters of an oral opener, characterized in that, The method includes the following steps: S100. Obtain a sample oral image set. The sample oral image set includes a number of sample oral image subsets. Any one of the sample oral image subsets includes an image of the corresponding sample oral cavity without the interference of an oral speculum and images under different interference methods. The length of the tongue depressor and / or the angle of the tongue depressor of the oral speculum corresponding to different interference methods are different. Any image included in the sample oral image set is a CT image scanned from the side of the corresponding sample oral cavity; S200. Divide the sample oral image set into several groups according to the oral width of the sample oral cavity corresponding to each sample oral image subset. Each group includes a number of sample oral image subsets. The oral width is the distance from the left wall of the oral cavity to the right wall; S300. Obtain a first target relationship corresponding to the oral width of each group according to the sample oral image subsets included in each group. The first target relationship is the relationship between the length of the tongue depressor, the angle of the tongue depressor, and the change amount of the tracheal muscle electrical signal intensity; S400. Obtain a second target relationship corresponding to the oral width of each group according to the sample oral image subsets included in each group. The second target relationship is the relationship between the length of the tongue depressor, the angle of the tongue depressor, and the change amount of the internal oral cavity space; S500. Obtain the length of the tongue depressor and the angle of the tongue depressor when interfering with the target oral cavity according to the first target relationship corresponding to the oral width of the target oral cavity, the second target relationship corresponding to the oral width of the target oral cavity, the target value of the change amount of the tracheal muscle electrical signal intensity, and the target value of the change amount of the internal oral cavity space.

2. The method for obtaining the mouth opener parameters according to claim 1, wherein S300 includes: S310, obtain the i-th subset V of sample oral images included in the specified group i ; the specified group is any group obtained by dividing the sample oral image set, and the value range of i is from 1 to u, where u is the number of subsets of sample oral images included in the specified group; S320, according to V i,q and V i,0 obtain V i corresponding change amount θ of the tongue position angle of the corresponding sample oral cavity under the corresponding q-th interference method i,q ; the tongue position angle is the included angle between the back of the tongue and the bottom of the oral cavity, V i,q is the image of the corresponding sample oral cavity under the corresponding q-th interference method, V i is the image of the corresponding sample oral cavity without the interference of the mouth opener, and the value range of q is from 1 to Q, where Q is the number of interference methods corresponding to the corresponding sample oral cavity i,0 is V i ; i The number of interference methods corresponding to the corresponding sample oral cavity; S330, according to θ i,q Obtain V according to the third target relationship corresponding to the oral cavity width corresponding to the specified group i The change amount g of the tracheal muscle electrical signal intensity of the corresponding sample oral cavity under the corresponding qth interference method i,q ; The third target relationship is the relationship between the change amount of the tongue position angle and the change amount of the tracheal muscle electrical signal intensity; S340, obtain the first target relationship corresponding to the oral cavity width corresponding to the specified group according to {G1, G2, …, G i , …, G u}; G i is the set of changes in the tracheal muscle electrical signal intensity corresponding to V i , G i = {(L i,1 , β i,1 , g i,1 ), (L i,2 , β i,2 , g i,2 ), …, (L i,q , β i,q , g i,q ), …, (L i,Q , β i,Q , g i,Q ), L i,q and β i,q are respectively the tongue depressor length and the tongue depressor angle corresponding to the q-th interference method of the sample oral cavity corresponding to V i .

3. The method for obtaining the mouth opener parameters according to claim 2, characterized in that, The obtaining process of the third target relationship corresponding to the oral width of the specified group includes: S331, obtain the training data set H; H = { (δ1, e1), (δ2, e2), …, (δ j , e j ), …, (δ z , e z )}, where δ j and e j are respectively the change in the tongue position angle and the change in the tracheal muscle electrical signal intensity in the j-th training data, and the oral cavity width corresponding to any training data is the oral cavity width corresponding to the specified group; the value range of j is from 1 to z, and z is the number of training data; 4. The method for obtaining the oral opener parameters according to claim 1, characterized in that, S332. Determine the change amount of the tracheal muscle electrical signal intensity as the dependent variable and the change amount of the tongue position angle as the independent variable, and fit the training data included in H to obtain the third target relationship corresponding to the oral width of the specified group. S410, obtain the \(i\)-th subset \(V\) of sample oral cavity images included in the specified group i ; the specified group is any group obtained by dividing \(M\) subsets of sample oral cavity images, and the value range of \(i\) is from 1 to \(u\), where \(u\) is the number of subsets of sample oral cavity images included in the specified group; S420, according to V i,q and V i,0 obtain V i corresponding change amount b of the internal oral cavity space of the corresponding sample oral cavity under the q-th interference method i,q ; V i,q is the image of the corresponding sample oral cavity under the q-th interference method corresponding to V i ; V i,0 is the image of the corresponding sample oral cavity without the interference of the mouth opener i ; the value range of q is from 1 to Q, and Q is the number of interference methods corresponding to the corresponding sample oral cavity of V i ; S430. Obtain the second target relationship corresponding to the oral cavity width corresponding to the specified group according to {B1, B2, …, B i , …, B u}; B i is the set of changes in the internal oral cavity space corresponding to V i . B i = {(L i,1 , β i,1 , b i,1 ), (L i,2 , β i,2 , b i,2 ), …, (L i,q , β i,q , b i,q ), …, (L i,Q , β i,Q , b i,Q ), where L i,q and β i,q are respectively the length of the tongue depressor and the angle of the tongue depressor corresponding to the q-th interference method of the sample oral cavity corresponding to V i .

5. The method for obtaining the mouth opener parameters according to claim 4, characterized in that, S400 includes: S421, Obtain V i,0 The area a of the oral cavity region of the sample in i,0 ; S422, obtain V i,q the area a of the oral cavity region of the sample in i,q ; S423, according to a i,0 and a i,q obtain the internal space change amount b of the internal space corresponding to the sample oral cavity in V i,q i,q .

6. The method for obtaining the mouth opener parameters according to claim 5, wherein, b i,q = (a i,q - a i,0 ) × d i × r i,q , d i is the oral cavity width corresponding to the i-th sample oral cavity, r i,q is the scaling ratio corresponding to V i,q .

7. The method for obtaining the mouth opener parameters according to claim 1, wherein S420 includes: S500 includes: S510. Substitute the target value of the change amount of the tracheal muscle electrical signal intensity into the first target relationship corresponding to the oral width of the target oral cavity to obtain a first equation; S520. Substitute the target value of the change amount of the internal oral cavity space into the second target relationship corresponding to the oral width of the target oral cavity to obtain a second equation; S530. Solve the first equation and the second equation, and determine the obtained length of the tongue depressor as the length of the tongue depressor when interfering with the target oral cavity, and determine the obtained angle of the tongue depressor as the angle of the tongue depressor when interfering with the target oral cavity.

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