CN105913424B - A kind of method and apparatus for inferring the age based on tooth - Google Patents
A kind of method and apparatus for inferring the age based on tooth Download PDFInfo
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- CN105913424B CN105913424B CN201610218021.XA CN201610218021A CN105913424B CN 105913424 B CN105913424 B CN 105913424B CN 201610218021 A CN201610218021 A CN 201610218021A CN 105913424 B CN105913424 B CN 105913424B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10072—Tomographic images
- G06T2207/10081—Computed x-ray tomography [CT]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30036—Dental; Teeth
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/155—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands use of biometric patterns for forensic purposes
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Abstract
The present invention provides a kind of method and apparatus that the age is inferred based on tooth, wherein this method comprises: obtaining the dental imaging data of target object；Application image dividing processing technology is partitioned into the image data of optimal tooth bit combination corresponding with the gender of target object from dental imaging data；Calculate the pulp cavity or pulp chamber bulking value of the tooth of each tooth position in the image data of optimal tooth bit combination；The pulp cavity of the tooth of each tooth position or pulp chamber bulking value are input in the corresponding age models of gender of target object, the age data of target object is obtained；Wherein, age models be previously according to the tooth of multiple tooth positions of sample object pulp cavity or pulp chamber bulking value it is built-up.The present invention reduces the limitations to people's living body or the Age Estimation method of corpse.
Description
Technical field
The present invention relates to medical verification technical field, in particular to it is a kind of based on tooth infer the age method and
Device.
Background technique
The Age Estimation of people's living body or corpse is in judge to the identity identification in the measurement of penalty of suspect and medical jurisprudence
In have a very important role.For baby, children and teen-age Age Estimation, can be according to human development during
The developmental character sign of bone or tooth is completed；And the deduction for adult's age, then lack suitable for practical method.
It include at present 14 analytic approach of carbon, aspartic acid racemic by the method that tooth carries out Age Estimation for adult
Method, cementum ring count method etc..These methods need to extract tooth, carry out lab analysis, and limitation is larger, it is impossible to be used in
The Age Estimation of people's living body.
For the above-mentioned problem larger to the Age Estimation method limitation of people's living body or corpse, not yet propose at present effective
Solution.
Summary of the invention
In view of this, the embodiment of the present invention is designed to provide a kind of method and apparatus that the age is inferred based on tooth,
It is more convenient efficient to reduce the limitation to the Age Estimation method of people's living body or corpse.
In a first aspect, the embodiment of the invention provides a kind of methods for inferring the age based on tooth, this method comprises: obtaining
The dental imaging data of target object；Application image dividing processing technology, is partitioned into and target object from dental imaging data
The corresponding optimal tooth bit combination of gender image data；Calculate the tooth of each tooth position in the image data of optimal tooth bit combination
Pulp cavity or pulp chamber bulking value；The gender that the pulp cavity of the tooth of each tooth position or pulp chamber bulking value are input to target object is corresponding
Age models in, obtain the age data of target object；Wherein, age models are multiple tooth positions previously according to sample object
Tooth pulp cavity or pulp chamber bulking value it is built-up.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein from
The image data that optimal tooth bit combination corresponding with the gender of target object is partitioned into dental imaging data includes: when target pair
When the gender of elephant is male, corresponding optimal tooth bit combination is: U1+U2+U3+U6+L4+L7；When the gender of target object is female
When property, corresponding optimal tooth bit combination is: U1+U3+U7+L7；When the gender of target object is unknown, corresponding optimal tooth hyte
Conjunction is: U1+U2+U3+U5+U6+U7+L7；Wherein, U1 represents maxillary central incisors, and U2 represents upper eyelid laxity, and U3 represents upper jaw point
Tooth, U5 represent the second premolar teeth of the upper jaw, and U6 represents maxillary first molar, and U7 represents maxillary second molar, and L4 represents lower jaw first
Premolar teeth, L7 represent mandibular second molar.
With reference to first aspect, the embodiment of the invention provides second of possible embodiments of first aspect, wherein will
The pulp cavity or pulp chamber bulking value of the tooth of each tooth position are input in the corresponding age models of gender of target object, obtain target
The age data of object includes:
When the gender of target object is male, corresponding age models are as follows:
Y=-19.617Lg10 (VU1) -14.514Lg10 (VU2)+37.349Lg10 (VU3)
-27.002Lg10(VL4)-18.071Lg10(VU6)-21.599Lg10(VL7)+110.318；
When the gender of target object is women, corresponding age models are as follows:
Y=-12.419Lg10 (VU1)+26.884Lg10 (VU3) -37.156Lg10 (VU7)
-26.511Lg10(VL7)+97.403；
When the gender of target object is unknown, corresponding age models are as follows:
Y=-20.464Lg10 (VU1) -9.069Lg10 (VU2)+41.347Lg10 (VU3)
-12.905Lg10(VU5)-13.566Lg10(VU6)-17.807Lg10(VU7)
-20.254Lg10(VL7)+99；
Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, and VU2 is represented
The bulking value of the U2 pulp cavity, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, VU6 generation
The bulking value of U6 pulp chamber described in table, VU7 represent the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity, VL7
Represent the bulking value of the L7 pulp chamber.
Above-mentioned possible embodiment with reference to first aspect, the third the embodiment of the invention provides first aspect can
The embodiment of energy, wherein age models are the pulp cavity or pulp chamber volume previously according to the tooth of multiple tooth positions of sample object
Being worth built-up includes: that the image data of the tooth on multiple tooth positions by the sample object to specified number carries out at image
Reason, is partitioned into the pulp cavity or pulp chamber of sample object tooth；Tooth on multiple tooth positions includes: single maxillary central incisors, the upper jaw
Lateral incisor, eye tooth, the second premolar teeth of the upper jaw, infradentale, lower jaw lateral incisor, lower jaw canine tooth, mandibular first premolar,
Second mandibular premolars and more maxillary first molars, maxillary second molar, mandibular first molar and mandibular second molar；
Calculate the pulp cavity or pulp chamber bulking value of the tooth on multiple tooth positions of sample object；According to the tooth on multiple tooth positions of sample object
The actual age and gender of the pulp cavity or pulp chamber bulking value of tooth, sample object, determine sample pair using multiple linear regression analysis
The optimal tooth bit combination of elephant and age models.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 4th kind of first aspect
Possible embodiment, wherein according to the pulp cavity or pulp chamber bulking value, sample object of the tooth on multiple tooth positions of sample object
Actual age and gender, optimal tooth bit combination and the age models packet of sample object are determined using multiple linear regression analysis
It includes: extracting the pulp cavity or pulp chamber volume data of the sample tooth under same gender parameter；By the sample tooth under same gender parameter
Numerical value after pulp cavity or pulp chamber volume data the progress logarithmic transformation of tooth is set as independent variable；By sample tooth corresponding practical year
Age is set as dependent variable；By multiple linear regression analysis, optimal tooth bit combination and the age models of sample object are calculated.
Second aspect, the embodiment of the invention provides a kind of devices that the age is inferred based on tooth, which includes: tooth
Image data acquisition module, for obtaining the dental imaging data of target object；Image dividing processing module is used for application image
Dividing processing technology is partitioned into the picture number of optimal tooth bit combination corresponding with the gender of target object from dental imaging data
According to；Bulking value computing module, the pulp cavity or pulp chamber of the tooth of each tooth position in the image data for calculating optimal tooth bit combination
Bulking value；Age data obtains module, for the pulp cavity of the tooth of each tooth position or pulp chamber bulking value to be input to target object
The corresponding age models of gender in, obtain the age data of target object；Wherein, age models are previously according to sample object
Multiple tooth positions tooth pulp cavity or pulp chamber bulking value it is built-up.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein on
Stating image dividing processing module includes: the optimal tooth bit combination determination unit of male, for when the gender of target object be male when,
Determine the corresponding optimal tooth bit combination of target object: U1+U2+U3+U6+L4+L7；The optimal tooth bit combination determination unit of women is used
In when the gender of target object is women, the corresponding optimal tooth bit combination of target object: U1+U3+U7+L7 is determined；Non- intellectual
Not optimal tooth bit combination determination unit, for when the gender of target object is unknown, determining the corresponding optimal tooth position of target object
Combination: U1+U2+U3+U5+U6+U7+L7；Wherein, U1 represents maxillary central incisors, and U2 represents upper eyelid laxity, and U3 represents upper jaw point
Tooth, U5 represent the second premolar teeth of the upper jaw, and U6 represents maxillary first molar, and U7 represents maxillary second molar, and L4 represents lower jaw first
Premolar teeth, L7 represent mandibular second molar.
In conjunction with second aspect, the embodiment of the invention provides second of possible embodiments of second aspect, wherein year
Age data acquisition module includes: men age data capture unit, for using male when the gender of target object is male
Age models obtain age data, wherein men age model are as follows:
Y=-19.617Lg10 (VU1) -14.514Lg10 (VU2)+37.349Lg10 (VU3)
-27.002Lg10(VL4)-18.071Lg10(VU6)-21.599Lg10(VL7)+110.318；
Female age data capture unit, for being obtained using female age model when the gender of target object is women
Take age data, wherein female age model are as follows:
Y=-12.419Lg10 (VU1)+26.884Lg10 (VU3) -37.156Lg10 (VU7)
-26.511Lg10(VL7)+97.403；
Unknown Sex, Age data capture unit, for using unknown gender year when the gender of target object is unknown
Rheology model obtains age data, wherein unknown Sex, Age model are as follows:
Y=-20.464Lg10 (VU1) -9.069Lg10 (VU2)+41.347Lg10 (VU3)
-12.905Lg10(VU5)-13.566Lg10(VU6)-17.807Lg10(VU7)
-20.254Lg10(VL7)+99；
Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, and VU2 is represented
The bulking value of the U2 pulp cavity, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, VU6 generation
The bulking value of U6 pulp chamber described in table, VU7 represent the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity, VL7
Represent the bulking value of the L7 pulp chamber.
In conjunction with the above-mentioned possible embodiment of second aspect, the third the embodiment of the invention provides second aspect can
The embodiment of energy, wherein above-mentioned apparatus further include: sample image processing module, for passing through the sample pair to specified number
The image data of tooth on multiple tooth positions of elephant carries out image procossing, is partitioned into the pulp cavity or pulp chamber of sample object tooth；It is more
Tooth on a tooth position include: single maxillary central incisors, upper eyelid laxity, eye tooth, the second premolar teeth of the upper jaw, in lower jaw
Incisor, lower jaw lateral incisor, lower jaw canine tooth, mandibular first premolar, second mandibular premolars and more maxillary first molars,
Maxillary second molar, mandibular first molar and mandibular second molar；Sample tooth computing module, for calculating the more of sample object
The pulp cavity or pulp chamber bulking value of tooth on a tooth position；Model construction module, on multiple tooth positions according to sample object
The actual age and gender of the pulp cavity or pulp chamber bulking value of tooth, sample object, determine sample using multiple linear regression analysis
The optimal tooth bit combination of object and age models.
In conjunction with the third possible embodiment of second aspect, the embodiment of the invention provides the 4th kind of second aspect
Possible embodiment, wherein above-mentioned model construction module includes: data extracting unit, extracts the sample under same gender parameter
The pulp cavity or pulp chamber volume data of this tooth；Independent variable setup unit, for by the marrow of the sample tooth under same gender parameter
Numerical value after chamber or pulp chamber volume data progress logarithmic transformation is set as independent variable；Dependent variable setup unit is used for sample tooth
The corresponding actual age of tooth is set as dependent variable；Model construction unit, for sample to be calculated by multiple linear regression analysis
The optimal tooth bit combination of this object and age models.
A kind of method and apparatus for inferring the age based on tooth provided in an embodiment of the present invention, by obtaining target object
Dental imaging data carry out the processing such as image dividing processing, calculating bulking value to above-mentioned data, obtain the optimal tooth of target object
Bit combination obtains the deduction age of target object based on optimal tooth bit combination and corresponding age models, and this mode can obtain
To accurate age value, and reduce the relevant technologies to the limitation of the Age Estimation method of people's living body or corpse, more
Add convenience and high-efficiency.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of method flow diagram that the age is inferred based on tooth provided by the embodiment of the present invention 1；
Fig. 2 shows a kind of apparatus structure schematic diagrams that the age is inferred based on tooth provided by the embodiment of the present invention 2；
Fig. 3 shows a kind of specific flow chart for the method that the age is inferred based on tooth provided by the embodiment of the present invention 3.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Middle attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of selected reality of the invention
Apply example.Based on the embodiment of the present invention, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall within the protection scope of the present invention.
In view of the existing method for carrying out Age Estimation by tooth needs to extract tooth, lab analysis is carried out,
Limitation is larger, it is impossible to be used in the problem of the Age Estimation of people's living body, the embodiment of the invention provides one kind to be inferred based on tooth
The method and apparatus at age, which can be realized using relevant software and equipment, be described below by embodiment.
Embodiment 1
A kind of method flow diagram for inferring the age based on tooth shown in Figure 1, method includes the following steps:
Step S102 obtains the dental imaging data of target object；
Step S104, application image dividing processing technology, is partitioned into the gender with target object from dental imaging data
The image data of corresponding optimal tooth bit combination；
Step S106 calculates the pulp cavity or pulp chamber volume of the tooth of each tooth position in the image data of optimal tooth bit combination
Value；
Step S108, the gender that the pulp cavity of the tooth of each tooth position or pulp chamber bulking value are input to target object are corresponding
In age models, the age data of target object is obtained；Wherein, age models are multiple tooth positions previously according to sample object
The pulp cavity or pulp chamber bulking value of tooth are built-up.
Unless specifically stated otherwise, the opposite step of the component and step that otherwise illustrate in these embodiments, digital table
It is not limit the scope of the invention up to formula and numerical value.
In the above method of the present embodiment, image dividing processing, meter are carried out by the dental imaging data to target object
It calculates bulking value and bulking value is input to the processing such as age models, obtain the age data of target object；The above method was both fitted
It is also applied for the Age Estimation of living body for corpse, reduces the limitation of Age Estimation technology.
The Age Estimation of people's living body or corpse is an important content in medical jurisprudence.Accurate Age Estimation is in judge couple
It has a very important role in the measurement of penalty of suspect and the identity identification in medical jurisprudence.Such as Large Scale Natural Disasters
The identity identification of caused unidentified corpse, does not have identity at the identity identification in ancient times or modern unidentified remains
Whether the age of the cross-border refugee proved is assert and for reaching the legal crime age there are the identifications of the age of the people of query.
There are a series of age_related changes for tooth, and possess and be easy preservation, have very by force to physical chemistry and time factor
The characteristics such as resistance；Increase rheological properties feature to be little affected by personal nutrition, take drugs, the influence of local environment and weather
Many advantages, such as, to carry out Age Estimation by tooth.
In view of the having a certain difference property of feature of different sexes tooth, the embodiment of the present invention in specific implementation, when
It first determines whether the gender of existing object, optimal tooth corresponding with the gender of target object is then partitioned into from dental imaging data
The image data of bit combination；When the gender of target object is male, corresponding optimal tooth bit combination is: U1+U2+U3+U6+L4
+L7；When the gender of target object is women, corresponding optimal tooth bit combination is: U1+U3+U7+L7；When the property of target object
When not unknown, corresponding optimal tooth bit combination is: U1+U2+U3+U5+U6+U7+L7；Wherein, U1 represents maxillary central incisors, U2 generation
Table upper eyelid laxity, U3 represent eye tooth, and U5 represents the second premolar teeth of the upper jaw, and U6 represents maxillary first molar, in U7 representative
Jaw second molar, L4 represent mandibular first premolar, and L7 represents mandibular second molar.
The mode of the above-mentioned optimal tooth bit combination of determination can improve while reducing data processing amount to target pair
As the accuracy of Age Estimation.
Further, in order to more accurately infer age of target object, the embodiment of the present invention is when realizing, by each tooth
The pulp cavity or pulp chamber bulking value of the tooth of position are input in the corresponding age models of gender of target object, obtain target object
Age data；Specifically, when the gender of target object is male, corresponding age models are as follows: Y=-19.617Lg10
(VU1)-14.514Lg10(VU2)
+37.349Lg10(VU3)-27.002Lg10(VL4)-18.071Lg10(VU6)
-21.599Lg10(VL7)+110.318；
When the gender of target object is women, corresponding age models are as follows: Y=-12.419Lg10 (VU1)
+26.884Lg10(VU3)-37.156Lg10(VU7)-26.511Lg10(VL7)+97.403；
When the gender of target object is unknown, corresponding age models are as follows: Y=-20.464Lg10 (VU1)
-9.069Lg10(VU2)+41.347Lg10(VU3)-12.905Lg10(VU5)
-13.566Lg10(VU6)-17.807Lg10(VU7)-20.254Lg10(VL7)+99；
Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, and VU2 is represented
The bulking value of the U2 pulp cavity, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, VU6 generation
The bulking value of U6 pulp chamber described in table, VU7 represent the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity, VL7
Represent the bulking value of the L7 pulp chamber.
By the gender corresponding age that the pulp cavity of the tooth of each tooth position or pulp chamber bulking value are input to target object
In model, the deduction age of target object is obtained；The above method reduces 14 analytic approach of carbon in the prior art, disappears outside aspartic acid
Rotation method, limitation existing for cementum ring count method etc., without analyzing the tooth extraction of target object, it is only necessary to provide
The image data of target object tooth, it is easy to operate, and there is certain accuracy.
In specific implementation, above-mentioned age models are the pulp cavity or marrow previously according to the tooth of multiple tooth positions of sample object
Chamber body product value is built-up, firstly, the image data of the tooth on the multiple tooth positions for passing through the sample object to specified number into
Row image procossing is partitioned into the pulp cavity or pulp chamber of sample object tooth；Tooth on multiple tooth positions includes: to cut in the single upper jaw
Tooth, upper eyelid laxity, eye tooth, the second premolar teeth of the upper jaw, infradentale, lower jaw lateral incisor, lower jaw canine tooth, lower jaw first
Premolar teeth, second mandibular premolars and more maxillary first molars, maxillary second molar, mandibular first molar and lower jaw
Two grind one's teeth in sleep；Secondly, calculating the pulp cavity or pulp chamber bulking value of the tooth on multiple tooth positions of sample object；Finally, according to sample pair
The pulp cavity of tooth on multiple tooth positions of elephant or the actual age and gender of pulp chamber bulking value, sample object, using multiple linear
Regression analysis determines optimal tooth bit combination and the age models of sample object.
The above method is handled by the data to sample object, building age models, on available multiple tooth positions
Tooth pulp cavity or the relationship between pulp chamber bulking value and the age of sample object, and then can use above-mentioned age models pair
The age of target object is inferred.
Further, the embodiment of the present invention is in the optimal tooth hyte for determining sample object using multiple linear regression analysis
When conjunction and age models, the pulp cavity or pulp chamber volume data of the sample tooth under same gender parameter are extracted；Same gender is joined
Numerical value after pulp cavity or pulp chamber volume data the progress logarithmic transformation of sample tooth under several is set as independent variable；By sample tooth
Corresponding actual age is set as dependent variable；By multiple linear regression analysis, the optimal tooth hyte of sample object is calculated
Conjunction and age models.
By way of above-mentioned multiple linear regression analysis, optimal tooth bit combination and age models can be obtained, and then realize
To the Age Estimation of target object.
Embodiment 2
A kind of apparatus structure schematic diagram for being inferred the age based on tooth shown in Figure 2, the device are comprised the following modules:
Dental imaging data acquisition module 22, for obtaining the dental imaging data of target object；
Image dividing processing module 24, be used for application image dividing processing technology, be partitioned into from dental imaging data with
The image data of the corresponding optimal tooth bit combination of the gender of target object；
Bulking value computing module 26, the pulp cavity of the tooth of each tooth position in the image data for calculating optimal tooth bit combination
Or pulp chamber bulking value；
Age data obtains module 28, for the pulp cavity of the tooth of each tooth position or pulp chamber bulking value to be input to target pair
In the corresponding age models of the gender of elephant, the age data of target object is obtained；Wherein, age models are previously according to sample pair
The pulp cavity or pulp chamber bulking value of the tooth of multiple tooth positions of elephant are built-up.
In the above-mentioned apparatus of the present embodiment, by obtain target object dental imaging data, to above-mentioned image data into
Row dividing processing, and the pulp cavity or pulp chamber bulking value of the tooth of each tooth position in image data are calculated, available and target object
The corresponding optimal tooth bit combination of gender and each tooth position tooth pulp cavity or pulp chamber bulking value；By the tooth of each tooth position
Pulp cavity or pulp chamber bulking value be input in the corresponding age models of gender of target object, obtain the age number of target object
According to；Above-mentioned apparatus is not only suitable for the Age Estimation that corpse is also applied for living body, reduces the limitation of Age Estimation technology.
It should be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
The technical effect and preceding method embodiment phase of device provided by the embodiment of the present invention, realization principle and generation
Together, to briefly describe, Installation practice part does not refer to place, can refer to corresponding contents in preceding method embodiment.
In order to obtain the optimal tooth bit combination at the age for inferring existing object, above-mentioned image dividing processing module
24 include:
The optimal tooth bit combination determination unit of male, for determining target object pair when the gender of target object is male
The optimal tooth bit combination answered: U1+U2+U3+U6+L4+L7；
The optimal tooth bit combination determination unit of women, for determining target object pair when the gender of target object is women
The optimal tooth bit combination answered: U1+U3+U7+L7；
The unknown optimal tooth bit combination determination unit of gender, for determining target object when the gender of target object is unknown
Corresponding optimal tooth bit combination: U1+U2+U3+U5+U6+U7+L7；
Wherein, U1 represents maxillary central incisors, and U2 represents upper eyelid laxity, and U3 represents eye tooth, and U5 represents the upper jaw second
Premolar teeth, U6 represent maxillary first molar, and U7 represents maxillary second molar, and L4 represents mandibular first premolar, and L7 represents lower jaw
Second molar.
Pass through above-mentioned image dividing processing module 24, it may be determined that the optimal tooth hyte under existing object different sexes parameter
It closes；The age that above-mentioned optimal tooth hyte is combined into subsequent relatively accurately deduction existing object provides preferable data combination base
Plinth.
Further, in order to relatively accurately infer age of existing object, above-mentioned age data obtains module 28 and includes:
Men age data capture unit, for being obtained using men age model when the gender of target object is male
Take age data, wherein men age model are as follows:
Y=-19.617Lg10 (VU1) -14.514Lg10 (VU2)+37.349Lg10 (VU3)
-27.002Lg10(VL4)-18.071Lg10(VU6)-21.599Lg10(VL7)+110.318；
Female age data capture unit, for being obtained using female age model when the gender of target object is women
Take age data, wherein female age model are as follows:
Y=-12.419Lg10 (VU1)+26.884Lg10 (VU3) -37.156Lg10 (VU7)
-26.511Lg10(VL7)+97.403；
Unknown Sex, Age data capture unit, for using unknown gender year when the gender of target object is unknown
Rheology model obtains age data, wherein unknown Sex, Age model are as follows:
Y=-20.464Lg10 (VU1) -9.069Lg10 (VU2)+41.347Lg10 (VU3)
-12.905Lg10(VU5)-13.566Lg10(VU6)-17.807Lg10(VU7)
-20.254Lg10(VL7)+99；
Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, and VU2 is represented
The bulking value of the U2 pulp cavity, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, VU6 generation
The bulking value of U6 pulp chamber described in table, VU7 represent the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity, VL7
Represent the bulking value of the L7 pulp chamber.
The processing that module 28 is obtained by above-mentioned age data, can relatively accurately infer the age number of existing object
According to, and have a wide range of application, it is not limited to the existing state of existing object.
Age models under above-mentioned different sexes parameter in order to obtain, above-mentioned apparatus further include:
Sample image processing module, the image of the tooth on multiple tooth positions by the sample object to specified number
Data carry out image procossing, are partitioned into the pulp cavity or pulp chamber of sample object tooth；Tooth on multiple tooth positions includes: single upper
Jaw central incisor, upper eyelid laxity, eye tooth, the second premolar teeth of the upper jaw, infradentale, lower jaw lateral incisor, lower jaw canine tooth, under
Jaw frist premolar, second mandibular premolars and more maxillary first molars, maxillary second molar, mandibular first molar and
Mandibular second molar；
Sample tooth computing module, the pulp cavity or pulp chamber volume of the tooth on multiple tooth positions for calculating sample object
Value；
Model construction module, the pulp cavity or pulp chamber bulking value, sample of the tooth on multiple tooth positions according to sample object
The actual age and gender of this object determine optimal tooth bit combination and the age mould of sample object using multiple linear regression analysis
Type.
It, can be with by the processing of above-mentioned sample image processing module, sample tooth computing module and model construction module
The age models under different sexes parameter are obtained, the age of existing object can be inferred using the age models.
Above-mentioned model construction module, in specific implementation, further includes: data extracting unit is extracted under same gender parameter
Sample tooth pulp cavity or pulp chamber volume data；Independent variable setup unit, for by the sample tooth under same gender parameter
Pulp cavity or pulp chamber volume data carry out logarithmic transformation after numerical value be set as independent variable；Dependent variable setup unit is used for sample
The corresponding actual age of this tooth is set as dependent variable；Model construction unit, for calculating by multiple linear regression analysis
Optimal tooth bit combination and age models to sample object.
By way of the multiple linear regression analysis of model construction module in above-mentioned apparatus, optimal tooth bit combination can be obtained
And age models, and then realize the Age Estimation to target object.
Embodiment 3
The method of the embodiment of the present invention is the method by iconography, shoots the CBCT of tooth, which is a kind of dentistry
Dedicated CT image；Then image is measured, is not only suitable for corpse in this way and is also applied for living body.
The theoretical basis of the embodiment of the present invention is the second stage of dentine deposition.The second stage of dentine deposition is one kind of tooth pulp cavity
Age_related changes, this variation are existing throughout one's life；With the continuous growth at age, the second stage of dentine is constantly deposited on pulp cavity
On wall, the volume of corresponding pulp cavity constantly reduces；So can be by the volume and the relationship at age for calculating pulp cavity
Row Age Estimation.The method of the embodiment of the present invention is retrospective collection batch of data, by calculating tooth pulp cavity or pulp chamber
Volume and the relationship at age obtain a formula, later using this formula carry out Age Estimation.
A kind of detailed process for the method that the age is inferred based on tooth provided by the embodiment of the present invention is shown referring to Fig. 3
Figure, method includes the following steps:
Step S302, Image Acquisition；
The present embodiment is with 125 males shot by NewTom VG conical beam CT machine and the CBCT three-dimensional figure of 115 women
As data instance is illustrated, using the CBCT 3 d image data of 125 males and 115 women as sample, wherein each
Image includes at least one single maxillary central incisors for meeting the standard of being included in, upper eyelid laxity, eye tooth, the upper jaw simultaneously
Two premolar teeths, infradentale, lower jaw lateral incisor, lower jaw canine tooth, mandibular first premolar, second mandibular premolars and more
Maxillary first molar, maxillary second molar, mandibular first molar, mandibular second molar.The tooth of totally 13 tooth positions.Each tooth position
Tooth is included in standard are as follows: no dental caries are bad, fill or treat without excessive wear, without prosthetic, interfere without metal artifacts, pulp cavity is without denticle
With dispersivity calcification.
Step S304, the segmentation of 13 tooth position pulp cavitys or pulp chamber and volume calculate, specific as follows:
The basic unit for forming conical beam CT three-dimensional data is voxel；Above-mentioned voxel is isotropic square.Number
After rebuilding by 0.15 millimeter of voxel value, the volume of each voxel is 0.15 millimeter × 0.15 millimeter × 0.15 millimeter.Data with
After DICOM format export, it imported into the software I TK-SNAP 2.4 of a open source, is partitioned into using software I TK-SNAP 2.4
Tooth pulp cavity is perhaps equivalent to after pulp chamber and has demarcated which voxel belongs to pulp cavity or pulp chamber.The number of calculating voxel, and multiplied by
The bulking value of each voxel can calculated pulp cavity or pulp chamber volume.
Specifically, the cutting procedure of multirooted teeth are as follows: after the completion of CBCT image taking, rebuild by 0.15 millimeter of voxel value
DICOM data are imported into 2.4 software of ITK-SNAP；The threshold value of artificial setting segmentation, white position are the portion of pulp cavity
Position, that is, determine which voxel belongs to pulp cavity；Using the small tool in software, a bubble is added in the part to be divided, quite
In one starting point of setting, software automatic identification and the consistent voxel of starting point threshold value；Entire pulp cavity segmentation is completed；For more
Tooth, in order to avoid the influence of the different and complicated root canal system of the number of root, using pulp chamber baseplane as segmentation plane, root of the tooth
It clips, reservation pulp chamber part；It calculates its voxel number and multiplied by the volume of each voxel, that is, acquires the volume of pulp chamber.
Specifically, the cutting procedure basic step of multi-rooted tooth: after the completion of CBCT image taking, by 0.15 millimeter of voxel value weight
The DICOM data built are imported into 2.4 software of ITK-SNAP；The threshold value of artificial setting segmentation, white position are pulp cavity
Position, that is, determine which voxel belongs to pulp cavity；Using the small tool in software, a bubble is added in the part to be divided,
It is equivalent to one starting point of setting, software automatic identification and the consistent voxel of starting point threshold value；Entire pulp cavity segmentation is completed；Due to
Only one root of the tooth of multi-rooted tooth, and be continuous entirety, do not need the volume of segmentation pulp chamber；Voxel value is calculated, obtains body
Product.
Through the above steps, the pulp cavity or pulp chamber volume of 13 tooth position teeth of every patient of 240 patients is calculated
Numerical value.
Step S306, multiple linear regression analysis calculate corresponding age formula (the i.e. above-mentioned age mould of optimal tooth bit combination
Type)；
Numerical value after 13 tooth position tooth pulp cavitys or pulp chamber bulking value are carried out logarithmic transformation is as independent variable, accordingly
Age uses SPSS19.0 to carry out multiple linear regression analysis the data obtained as dependent variable, and optimal tooth bit combination is calculated
And math equation is as follows:
For male, the optimal tooth bit combination of Age Estimation are as follows: U1+U2+U3+U6+L4+L7；
Age Estimation formula are as follows:
Y=-19.617Lg10 (VU1) -14.514Lg10 (VU2)+37.349Lg10 (VU3)
-27.002Lg10(VL4)-18.071Lg10(VU6)-21.599Lg10(VL7)+110.318；
For women, the optimal tooth bit combination of Age Estimation are as follows: U1+U3+U7+L7
Age Estimation formula are as follows:
Y=-12.419Lg10 (VU1)+26.884Lg10 (VU3) -37.156Lg10 (VU7)
-26.511Lg10(VL7)+97.403；
For unknown gender, the optimal tooth position of Age Estimation are as follows: U1+U2+U3+U5+U6+U7+L7
Age Estimation formula are as follows:
Y=-20.464Lg10 (VU1) -9.069Lg10 (VU2)+41.347Lg10 (VU3)
-12.905Lg10(VU5)-13.566Lg10(VU6)-17.807Lg10(VU7)
-20.254Lg10(VL7)+99；
Wherein, U1 represents maxillary central incisors, and U2 represents upper eyelid laxity, and U3 represents eye tooth, and U5 represents the upper jaw second
Premolar teeth, U6 represent maxillary first molar, and U7 represents maxillary second molar, and L4 represents mandibular first premolar, and L7 represents lower jaw
Second molar；Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, VU2 generation
The bulking value of U2 pulp cavity described in table, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, VU6
The bulking value of the U6 pulp chamber is represented, VU7 represents the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity,
VL7 represents the bulking value of the L7 pulp chamber.
With the standard error (standard errors of the estimate, SEE) of predicted value for index, mould is evaluated
The accuracy of type prediction.Then for male, women and unknown sex population, SEE is respectively 7.100 years old, and 6.258 years old, 6.970
Year, the result can satisfy practical application request.
Step S308 calculates the age of current target object using above-mentioned age formula；Specific calculating process is as follows:
(1) the dental imaging data of target object are obtained；Such as: it is individual (i.e. target object) that Age Estimation is carried out needed for acquisition
CBCT image；
(2) application image dividing processing technology is partitioned into the gender pair with target object from above-mentioned dental imaging data
The image data for the optimal tooth bit combination answered；
(3) pulp cavity or pulp chamber bulking value of the tooth of each tooth position in the image data of above-mentioned optimal tooth bit combination are calculated；
Divide according to gender and calculate the pulp cavity or pulp chamber volume of its image tooth position tooth；Such as women, then separation calculation
Its CBCT image maxillary central incisors, eye tooth, maxillary second molar, the pulp cavity of four tooth position teeth of mandibular second molar or
Pulp chamber bulking value；
(4) pulp cavity of the tooth of each tooth position or pulp chamber bulking value are input to the gender corresponding year of above-mentioned target object
In rheology model (i.e. above-mentioned age formula), the age data of above-mentioned target object is obtained.Such as women, then formula Y=- is brought into
12.419Lg10(VU1)+26.884Lg10(VU3)
-37.156Lg10(VU7)-26.511Lg10(VL7)+97.403；Obtain the deduction age to the end.
The above method is suitable for the Age Estimation under different situations, and is not only restricted to corpse or living body, and can be used for growing up
The Age Estimation of people.It is combined under specific circumstances with other Age Estimation methods, better effect can be obtained.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention.Should all it cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. a kind of method for inferring the age based on tooth characterized by comprising
Obtain the dental imaging data of target object；
Application image dividing processing technology is partitioned into corresponding with the gender of the target object from the dental imaging data
The image data of optimal tooth bit combination；
Calculate the pulp cavity or pulp chamber bulking value of the tooth of each tooth position in the image data of the optimal tooth bit combination；
The pulp cavity of the tooth of each tooth position or pulp chamber bulking value are input to the gender corresponding age of the target object
In model, the age data of the target object is obtained；Wherein, the age models are multiple teeth previously according to sample object
The pulp cavity or pulp chamber bulking value of the tooth of position are built-up；
The picture number of optimal tooth bit combination corresponding with the gender of the target object is partitioned into from the dental imaging data
According to including: when the gender of the target object is male, corresponding optimal tooth bit combination is: U1+U2+U3+U6+L4+L7；When
When the gender of the target object is women, corresponding optimal tooth bit combination is: U1+U3+U7+L7；When the target object
When gender is unknown, corresponding optimal tooth bit combination is: U1+U2+U3+U5+U6+U7+L7；
Wherein, U1 represents maxillary central incisors, and U2 represents upper eyelid laxity, and U3 represents eye tooth, and U5 is ground before representing the upper jaw second
Tooth, U6 represent maxillary first molar, and U7 represents maxillary second molar, and L4 represents mandibular first premolar, and L7 represents lower jaw second
It grinds one's teeth in sleep.
2. the method according to claim 1, wherein by the pulp cavity or pulp chamber volume of the tooth of each tooth position
Value is input in the corresponding age models of gender of the target object, and the age data for obtaining the target object includes:
When the gender of the target object is male, corresponding age models are as follows:
Y=-19.617Lg10 (VU1) -14.514Lg10 (VU2)+37.349Lg10 (VU3)
-27.002Lg10(VL4)-18.071Lg10(VU6)-21.599Lg10(VL7)+110.318；
When the gender of the target object is women, corresponding age models are as follows:
Y=-12.419Lg10 (VU1)+26.884Lg10 (VU3) -37.156Lg10 (VU7)
-26.511Lg10(VL7)+97.403；
When the gender of the target object is unknown, corresponding age models are as follows:
Y=-20.464Lg10 (VU1) -9.069Lg10 (VU2)+41.347Lg10 (VU3)
-12.905Lg10(VU5)-13.566Lg10(VU6)-17.807Lg10(VU7)
-20.254Lg10(VL7)+99；
Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, described in VU2 is represented
The bulking value of U2 pulp cavity, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, and VU6 represents institute
The bulking value of U6 pulp chamber is stated, VU7 represents the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity, and VL7 is represented
The bulking value of the L7 pulp chamber.
3. method according to claim 1 or 2, which is characterized in that the age models are previously according to sample object
The pulp cavity of the tooth of multiple tooth positions or pulp chamber bulking value is built-up includes:
Image procossing is carried out by the image data of the tooth on multiple tooth positions of the sample object to specified number, is partitioned into institute
State the pulp cavity or pulp chamber of sample object tooth；Tooth on the multiple tooth position includes: single maxillary central incisors, upper jaw lateral incision
Tooth, eye tooth, the second premolar teeth of the upper jaw, infradentale, lower jaw lateral incisor, lower jaw canine tooth, mandibular first premolar, lower jaw
Second premolar teeth and more maxillary first molars, maxillary second molar, mandibular first molar and mandibular second molar；
Calculate the pulp cavity or pulp chamber bulking value of the tooth on multiple tooth positions of the sample object；
According to the practical year of the pulp cavity of the tooth on multiple tooth positions of the sample object or pulp chamber bulking value, the sample object
Age and gender determine optimal tooth bit combination and the age models of the sample object using multiple linear regression analysis.
4. according to the method described in claim 3, it is characterized in that, according to the tooth on multiple tooth positions of the sample object
The actual age and gender of pulp cavity or pulp chamber bulking value, the sample object determine the sample using multiple linear regression analysis
The optimal tooth bit combination of this object and age models include:
Extract the pulp cavity or pulp chamber volume data of the sample tooth under same gender parameter；
Numerical value after the pulp cavity of the sample tooth under same gender parameter or pulp chamber volume data to be carried out to logarithmic transformation is set
It is set to independent variable；
The corresponding actual age of the sample tooth is set as dependent variable；
By multiple linear regression analysis, optimal tooth bit combination and the age models of the sample object are calculated.
5. a kind of device for inferring the age based on tooth characterized by comprising
Dental imaging data acquisition module, for obtaining the dental imaging data of target object；
Image dividing processing module is used for application image dividing processing technology, is partitioned into from the dental imaging data and institute
State the image data of the corresponding optimal tooth bit combination of gender of target object；
Bulking value computing module, in the image data for calculating the optimal tooth bit combination pulp cavity of the tooth of each tooth position or
Pulp chamber bulking value；
Age data obtains module, for the pulp cavity of the tooth of each tooth position or pulp chamber bulking value to be input to the target
In the corresponding age models of the gender of object, the age data of the target object is obtained；Wherein, the age models are preparatory
It is built-up according to the pulp cavity of the tooth of multiple tooth positions of sample object or pulp chamber bulking value
Described image dividing processing module is also used to: when the gender of the target object is male, corresponding optimal tooth hyte
Conjunction is: U1+U2+U3+U6+L4+L7；When the gender of the target object is women, corresponding optimal tooth bit combination is: U1+
U3+U7+L7；When the gender of the target object is unknown, corresponding optimal tooth bit combination is: U1+U2+U3+U5+U6+U7+
L7；
Wherein, U1 represents maxillary central incisors, and U2 represents upper eyelid laxity, and U3 represents eye tooth, and U5 is ground before representing the upper jaw second
Tooth, U6 represent maxillary first molar, and U7 represents maxillary second molar, and L4 represents mandibular first premolar, and L7 represents lower jaw second
It grinds one's teeth in sleep.
6. device according to claim 5, which is characterized in that the age data obtains module and includes:
Men age data capture unit, for being obtained using men age model when the gender of the target object is male
Take age data, wherein the men age model are as follows:
Y=-19.617Lg10 (VU1) -14.514Lg10 (VU2)+37.349Lg10 (VU3)
-27.002Lg10(VL4)-18.071Lg10(VU6)-21.599Lg10(VL7)+110.318；
Female age data capture unit, for being obtained using female age model when the gender of the target object is women
Take age data, wherein the female age model are as follows:
Y=-12.419Lg10 (VU1)+26.884Lg10 (VU3) -37.156Lg10 (VU7)
-26.511Lg10(VL7)+97.403；
Unknown Sex, Age data capture unit, for using unknown gender year when the gender of the target object is unknown
Rheology model obtains age data, wherein the unknown Sex, Age model are as follows:
Y=-20.464Lg10 (VU1) -9.069Lg10 (VU2)+41.347Lg10 (VU3)
-12.905Lg10(VU5)-13.566Lg10(VU6)-17.807Lg10(VU7)
-20.254Lg10(VL7)+99；
Wherein, Y represents the age, and Lg10 represents common logarithm transformation, and VU1 represents the bulking value of the U1 pulp cavity, described in VU2 is represented
The bulking value of U2 pulp cavity, VU3 represent the bulking value of the U3 pulp cavity, and VU5 represents the bulking value of the U5 pulp cavity, and VU6 represents institute
The bulking value of U6 pulp chamber is stated, VU7 represents the bulking value of the U7 pulp chamber, and VL4 represents the bulking value of the L4 pulp cavity, and VL7 is represented
The bulking value of the L7 pulp chamber.
7. device according to claim 5 or 6, which is characterized in that described device further include:
Sample image processing module, the image data of the tooth on multiple tooth positions by the sample object to specified number
Image procossing is carried out, the pulp cavity or pulp chamber of the sample object tooth are partitioned into；Tooth on the multiple tooth position includes: single
Maxillary central incisors, upper eyelid laxity, eye tooth, the second premolar teeth of the upper jaw, infradentale, lower jaw lateral incisor, lower jaw point
Tooth, mandibular first premolar, second mandibular premolars and more maxillary first molars, maxillary second molar, lower jaw first are ground
Tooth and mandibular second molar；
Sample tooth computing module, the pulp cavity or pulp chamber volume of the tooth on multiple tooth positions for calculating the sample object
Value；
Model construction module, the pulp cavity or pulp chamber bulking value of the tooth on multiple tooth positions according to the sample object, institute
The actual age and gender for stating sample object determine the optimal tooth bit combination of the sample object using multiple linear regression analysis
And age models.
8. device according to claim 7, which is characterized in that the model construction module includes:
Data extracting unit extracts the pulp cavity or pulp chamber volume data of the sample tooth under same gender parameter；
Independent variable setup unit, for carrying out the pulp cavity of the sample tooth under same gender parameter or pulp chamber volume data
Numerical value after logarithmic transformation is set as independent variable；
Dependent variable setup unit, for the corresponding actual age of the sample tooth to be set as dependent variable；
Model construction unit, for the optimal tooth bit combination of the sample object to be calculated by multiple linear regression analysis
And age models.
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