CN112102952A - Method for identifying pathological category based on distance calculation method and related device - Google Patents
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Abstract
The embodiment of the invention discloses a method for identifying pathological categories based on a distance calculation method, which comprises the steps of obtaining characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics; acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories; respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathological category by adopting a preset distance calculation method to obtain M prediction distances; and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the M prediction distances, and calculating and comparing the characteristic parameter to be diagnosed and the standard parameters corresponding to the pathological types one by one to realize automation of pathological diagnosis and improve the objectivity and accuracy of the pathological diagnosis. In addition, a system, a computer device and a storage medium for identifying a pathology category based on a distance calculation method are also provided.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method for identifying pathological types based on a distance calculation method and related equipment.
Background
The pathological diagnosis is the research on the cause and pathogenesis of the disease, and the morphological structure, functional metabolic change and the outcome of the disease in the disease process, thereby providing necessary theoretical basis and practical basis for the diagnosis, treatment and prevention of the disease. Pathological diagnosis is the most reliable of various examination methods of tumors, and is self-diagnosed as "gold standard" and the final diagnosis of diseases.
From clinical symptoms to traditional HE pathological forms, there are many similar lesions that are extremely confused with a variety of diseases, including benign and malignant diseases. Once misdiagnosed, serious medical accidents will result. In the course of disease diagnosis, differential diagnosis is required for many similar pathologies. For example, neoplastic diseases, have varying degrees of expression of various proteins and variations in various genes. The occurrence of these proteins and genes is referred to as a characteristic parameter. And neoplastic diseases are referred to as the resultant phenomena. The most intuitive and detectable result of doctors is characteristic parameters, and comprehensive analysis of the expression condition of the characteristic parameters is needed, and the accumulated experience of doctors at the previous stage and knowledge in book literature are integrated. And finally, prejudging the resultant phenomenon. The doctor sees the result report and the imaging report of the examination, combines the medical history and the clinical data to comprehensively select N types of lesions with possibility, and obtains the most preferential diagnosis result through comprehensive analysis and consultation discussion. And finally, prejudging the resultant phenomenon. However, at present, the phenomenon of result prediction is carried out based on experience of different personal levels, and serious personal subjectivity influence exists. Moreover, the difference of interpretation of the result phenomena is large among different medical institutions and different doctors, and the objectivity of pathological classification identification is reduced, so that the diagnosis and treatment quality is influenced to a certain extent, the accuracy of pathological classification identification is low, and the pathological diagnosis leak rate is high.
Disclosure of Invention
In view of the above, there is a need to provide a method, system, computer device and storage medium for identifying a pathology category based on a distance calculation method, so as to improve objectivity and accuracy of pathological diagnosis.
A method of identifying a pathology category based on a distance calculation method, the method comprising:
acquiring characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number;
acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number;
respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances;
and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M predicted distances.
A system for identifying a category of pathology based on a distance calculation method, the system comprising:
the system comprises a first parameter acquisition module, a second parameter acquisition module and a parameter analysis module, wherein the first parameter acquisition module is used for acquiring characteristic parameters to be diagnosed, the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number;
the second parameter acquisition module is used for acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number;
the calculation module is used for respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances;
and the diagnosis module is used for determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M prediction distances.
A computer device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of:
acquiring characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number;
acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number;
respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances;
and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M predicted distances.
A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number;
acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number;
respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances;
and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M predicted distances.
The method, the system, the computer equipment and the storage medium for identifying the pathological type based on the distance calculation method acquire the characteristic parameters to be diagnosed; acquiring a preset standard parameter; respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances; and determining the pathological category corresponding to the characteristic parameter to be diagnosed according to the M predicted distances, and performing pathological diagnosis by adopting various distance calculation-based methods, so that the accuracy and objectivity of pathological diagnosis are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a flow diagram of a method for identifying a pathology category based on a distance calculation method in one embodiment;
FIG. 2 is a flow diagram of a method for predicted distance calculation in one embodiment;
FIG. 3 is a flow chart of a method of calculating a predicted distance in another embodiment;
FIG. 4 is a flow diagram of a pathology category determination method in one embodiment;
FIG. 5 is a block diagram of a system for identifying a pathology category based on a distance computation method, according to one embodiment;
FIG. 6 is a block diagram of a computer device in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, in an embodiment, a method for identifying a pathology category based on a distance calculation method is provided, and the method for identifying a pathology category based on a distance calculation method may be applied to a terminal or a server, and the embodiment is exemplified by being applied to a server. The method for identifying the pathological category based on the distance calculation method specifically comprises the following steps of:
102, obtaining characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number.
The characteristic parameters to be diagnosed are parameters for reflecting pathological characteristics of pathological sections to be diagnosed, and the characteristic parameters to be diagnosed comprise a plurality of characteristic parameters corresponding to a plurality of characteristics. In one embodiment, the pathological section to be diagnosed is an ovarian epithelial malignancy, and the corresponding 7 characteristic parameters may be values corresponding to Pax-8, WT-1, CA125, P53, CEA, ER, and PVHL. Specifically, the characteristic parameter to be diagnosed can be obtained after the pathological section is analyzed by a pathological analysis instrument.
And 104, acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number.
The preset standard parameters are parameters set according to the size or range of the N characteristic parameters under each pathology category, and the standard parameters correspond to the characteristic parameters to be diagnosed one by one, namely each pathology category comprises N standard parameters, so that the M pathology categories comprise M multiplied by N standard parameters. Continuing with the example of ovarian epithelial malignancy in step S102, there are 7 characteristic parameters corresponding to the presence of pathological categories including: serous adenocarcinomas, mucinous adenocarcinomas, endometrioid adenocarcinomas, clear cell adenocarcinomas, and metastatic adenocarcinomas. There are N standard parameters for each pathological category, for example, the values for 7 standard parameters for pathological categories of serous adenocarcinoma, i.e., Pax-8, WT-1, CA125, P53, CEA, ER, and PVHL, are 95%, 75%, and 5%, respectively.
And 106, respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances.
The preset distance calculation method is a preset quantification method for comparing the similarity degree of the characteristic parameter to be diagnosed and the standard parameter. The distance calculation method may be one or more of euclidean distance, minkowski distance, manhattan distance, chebyshev distance, cosine similarity, and/or distance measurement of pearson correlation coefficient, and may be specifically selected according to the characteristics of each distance itself and the characteristics of the standard parameter and/or the characteristic parameter to be diagnosed. The predicted distance is a quantized value of the similarity degree between the characteristic parameter to be diagnosed and the standard parameter corresponding to each pathological category. Specifically, N characteristic parameters in the characteristic parameters to be diagnosed and N standard parameters corresponding to M pathology categories are respectively calculated according to a preset distance calculation method, so as to obtain M predicted distances. The method can be understood that the prediction distance between the characteristic parameter to be diagnosed and the standard parameter corresponding to each pathological category is calculated through a preset distance calculation method, so that the specific quantification of the similarity degree between the characteristic parameter to be diagnosed and the standard parameter is realized, and the objectivity of calculation of the prediction distance is improved. And because the preset distance calculation method comprises various distance measures, the accuracy of the calculation of the predicted distance is improved.
And step 108, determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the M prediction distances.
Specifically, the pathological category corresponding to the characteristic parameter to be diagnosed is determined according to the specific numerical values corresponding to the M prediction distances and the positive correlation or the inverse correlation between the prediction distance and the similarity. For example, 5 pathological categories: the predicted distances corresponding to serous adenocarcinoma, mucinous adenocarcinoma, endometrioid adenocarcinoma, clear cell adenocarcinoma, and metastatic gonadal carcinoma are: 0.7, 0.5, 0.4 and 0.5, wherein the prediction distance is positively correlated with the similarity degree, namely the larger the prediction distance is, the higher the similarity degree is, and the pathological category corresponding to the characteristic parameter to be diagnosed is the pathological category corresponding to the prediction distance of 0.7, namely serous adenocarcinoma. Understandably, the pathological diagnosis is automated and the objectivity and the accuracy of the pathological diagnosis are ensured by calculating and comparing the characteristic parameters to be diagnosed with the standard parameters corresponding to each pathological category one by one.
According to the method for identifying the pathological category based on the distance calculation method, the characteristic parameters to be diagnosed are obtained, and the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics; acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories; respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathological category by adopting a preset distance calculation method to obtain M prediction distances; and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the M predicted distances, and calculating and comparing the characteristic parameter to be diagnosed and the standard parameters corresponding to the pathological types one by adopting various distance calculation-based methods, so that the pathological diagnosis is automated, and the objectivity and the accuracy of the pathological diagnosis are improved.
As shown in fig. 2, in an embodiment, the calculating the predicted distance between the characteristic parameter to be diagnosed and the standard parameter corresponding to each pathology category by using a preset distance calculation method to obtain M predicted distances includes:
and step 106B, respectively carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances.
The first distance and the second distance are two kinds of distances respectively, and are classified according to the correlation relationship with the similarity degree. For example, a first distance is positively correlated with the degree of similarity, and a second distance is inversely correlated with the degree of similarity. The characteristic distance refers to the distance between a single characteristic parameter and a corresponding standard parameter, and the characteristic distance can also be one or more of Euclidean distance, Megowski distance, Manhattan distance, Chebyshev distance, cosine similarity and/or distance measurement of Pearson correlation coefficient. Specifically, respectively carrying out distance calculation on the N characteristic parameters and standard parameters corresponding to the M pathological categories, wherein the distance is a first distance and/or a second distance, and obtaining M multiplied by N characteristic distances; and then carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances. The fusion calculation is a processing method of performing calculation by integrating a plurality of indexes, and for example, the calculation of weighted summation may be performed after setting the weight of each index according to the importance of each index, or may be a method of performing adaptive fusion according to a preset rule. In this embodiment, the influence of each feature distance on the predicted distance is taken into consideration by fusion calculation, so that the accuracy of determining the predicted distance is further ensured.
As shown in fig. 3, in an embodiment, the fusion calculation of the N feature distances corresponding to each pathology category to obtain M predicted distances includes:
step 106B1, acquiring a preset weight corresponding to each characteristic distance;
and step 106B2, performing weighted calculation according to the N characteristic distances corresponding to each pathology type and the corresponding preset weights to obtain M predicted distances.
Specifically, a preset weight of each feature distance is determined first, and the preset weight can be set according to the influence of each feature distance on the correctness of pathological diagnosis. And then, performing weighted calculation according to the N characteristic distances corresponding to each pathology category and the corresponding preset weights to obtain M predicted distances. It can be understood that, in this embodiment, the predicted distance is obtained through weighting calculation, and the fusion calculation method is simple and fast, so that the speed of calculating the predicted distance is increased.
In one embodiment, the first distance is at least one of a euclidean distance, a minkowski distance, a manhattan distance, and a chebyshev distance, and the second distance is a cosine similarity and/or a pearson correlation coefficient.
Wherein, the first Distance is at least one of Euclidean Distance, Minkowski Distance, Manhattan Distance and Chebyshev Distance, Euclidean Distance (Euclidean Distance) is the absolute Distance between each point in the multidimensional space, and the formula is as follows:
wherein, dist (X)1,Y1) Expressed as the Euclidean distance, xiExpressed as the i-th characteristic parameter, yiExpressed as the ith standard parameter corresponding to the ith characteristic parameter. Minkowski Distance (Minkowski Distance) is a generalization of euclidean Distance and is a generalized representation of a number of Distance metric equations, which are:
wherein, dist (X)2,Y2) Expressed as the Minkowski distance, xiExpressed as the i-th characteristic parameter, yiExpressed as the ith standard parameter corresponding to the ith characteristic parameter, and p is a constant. Manhattan Distance (Manhattan Distance) is derived from city block Distance, and is a result of summing distances in multiple dimensions, and the formula is as follows:
wherein, dist (X)3,Y3) Expressed as the Manhattan distance, xiExpressed as the i-th characteristic parameter, yiExpressed as the ith standard parameter corresponding to the ith characteristic parameter. Chebyshev Distance (Chebyshev Distance) is a measure in vector space, and the Distance between two points is defined as the maximum of the absolute value of the difference between the values of its coordinates, and is expressed by the following formula:
wherein, dist (X)4,Y4) Expressed as the Chebyshev distance, xiExpressed as the i-th characteristic parameter, yiExpressed as the ith standard parameter corresponding to the ith characteristic parameter. And the Euclidean distance, the Minkowski distance, the Manhattan distance and the Chebyshev distance are in a negative correlation with the similarity degree, namely the greater the first distance is, the lower the similarity degree is. The second distance is Cosine Similarity and/or Pearson correlation coefficient, the Cosine Similarity (Cosine Similarity) is the difference between two individuals measured by Cosine value of two vector included angle in vector space, and the formula is:
where sim (X, Y) is expressed as cosine similarity, X is expressed as a characteristic parameter, and Y is expressed as a standard parameter corresponding to the characteristic parameter X. Pearson Correlation Coefficient (Pearson Correlation Coefficient) is used to measure whether two data sets are on a line, and is used to measure the linear relation between distance variables, and the formula is:
where r (X, Y) is expressed as a pearson correlation coefficient, X is expressed as a characteristic parameter, and Y is expressed as a standard parameter corresponding to the characteristic parameter X. The cosine similarity and the pearson correlation coefficient are in a negative correlation with the similarity, i.e., the greater the second distance, the higher the similarity. It can be understood that the first distance and the second distance have respective distance measurement scenes, and therefore, the appropriate first distance or second distance is selected according to the application scene of the characteristic parameter to be diagnosed, so as to further improve the accuracy of pathological diagnosis.
In one embodiment, obtaining the preset weight corresponding to each feature distance includes: when the characteristic distance is the first distance, the preset weight is a negative number; when the characteristic distance is the second distance, the preset weight is a positive number.
Specifically, when the characteristic distance is a first distance, the preset weight is a negative number, when the characteristic distance is a second distance, the preset weight is a positive number, the first distance is in negative correlation with the similarity, the corresponding preset weight is determined to be a negative number, the second distance is in positive correlation with the similarity, and the corresponding preset weight is determined to be a positive number, so that the predicted distance calculated based on the preset weight is in positive correlation with the similarity, pathological diagnosis can be conveniently performed according to the predicted distance, and the pathological diagnosis efficiency is further improved.
In one embodiment, the fusion calculation of the N feature distances corresponding to each pathology category to obtain M predicted distances includes: when the characteristic distance is the first distance, the predicted distance is in negative correlation with the characteristic distance; when the characteristic distance is the second distance, the predicted distance is positively correlated with the characteristic distance.
As shown in fig. 4, in an embodiment, determining the pathology category corresponding to the feature parameter to be diagnosed according to the magnitudes of the M predicted distances includes:
and step 108B, determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the probability of each pathological type.
In this embodiment, a ratio of each of the predicted distances to the sum of the M predicted distances is calculated, the ratio is determined as a probability of a pathology category corresponding to the feature parameter to be diagnosed, and the pathology category corresponding to the feature parameter to be diagnosed is determined according to the probability of each pathology category. For example, 5 pathological categories: the predicted distances corresponding to serous adenocarcinoma, mucinous adenocarcinoma, endometrioid adenocarcinoma, clear cell adenocarcinoma, and metastatic gonadal carcinoma are: 0.7, 0.5, 0.4 and 0.5, wherein the probability of each corresponding pathological category is 28%, 20%, 16% and 20% in sequence, so that serous adenocarcinoma with the probability of 28% of the pathological category is the pathological category corresponding to the characteristic parameter to be diagnosed. It can be understood that, by determining the probability of each predicted distance in the M predicted distances as the corresponding pathological category as the basis of pathological diagnosis, not only the calculation is simple and fast, but also the accuracy of pathological diagnosis and the efficiency of pathological diagnosis are improved.
As shown in fig. 5, in one embodiment, a system for identifying a category of pathology based on a distance calculation method is proposed, the system comprising:
a first parameter obtaining module 502, configured to obtain a feature parameter to be diagnosed, where the feature parameter to be diagnosed includes N feature parameters corresponding to N features, where N is a natural number;
a second parameter obtaining module 504, configured to obtain preset standard parameters, where the preset standard parameters include M × N standard parameters of N features corresponding to M types of pathology categories, where M is a natural number;
a calculating module 506, configured to calculate predicted distances between the feature parameter to be diagnosed and the standard parameter corresponding to each pathology category by using a preset distance calculating method, respectively, so as to obtain M predicted distances;
and the diagnosis module 508 is configured to determine a pathology category corresponding to the feature parameter to be diagnosed according to the magnitudes of the M predicted distances.
In one embodiment, the calculation module comprises:
the distance calculation unit is used for calculating a first distance and/or a second distance between each characteristic parameter and the standard parameters corresponding to the M pathological categories respectively to obtain M multiplied by N characteristic distances;
and the distance fusion unit is used for respectively carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances.
In one embodiment, the distance fusion unit includes:
the weight obtaining subunit is used for obtaining a preset weight corresponding to each characteristic distance;
and the fusion calculation subunit is used for performing weighted calculation according to the N characteristic distances corresponding to each pathology category and the corresponding preset weights to obtain M predicted distances.
In one embodiment, the diagnostic module comprises:
a probability calculation unit for determining the ratio of each of the predicted distances in the M predicted distances as the probability of the corresponding pathology category;
and the pathological diagnosis unit is used for determining the pathological category corresponding to the characteristic parameter to be diagnosed according to the probability of each pathological category.
FIG. 6 is a diagram illustrating an internal structure of a computer device in one embodiment. The computer device may specifically be a server including, but not limited to, a high performance computer and a cluster of high performance computers. As shown in fig. 6, the computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and may also store a computer program that, when executed by the processor, causes the processor to implement a method of identifying a category of pathology based on a distance calculation method. The internal memory may also have stored therein a computer program that, when executed by the processor, causes the processor to perform a method for identifying a category of pathology based on a distance calculation method. Those skilled in the art will appreciate that the architecture shown in fig. 6 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the method for identifying a pathology category based on a distance calculation method provided herein may be implemented in the form of a computer program that is executable on a computer device as shown in fig. 6. The memory of the computer device may store therein respective program templates constituting a system for identifying a category of pathology based on a distance calculation method. For example, the first parameter obtaining module 502, the second parameter obtaining module 504, the calculating module 506, and the diagnosing module 508.
A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program: acquiring characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number; acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number; respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances; and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M predicted distances.
In one embodiment, the calculating, by using a preset distance calculation method, the predicted distances between the characteristic parameter to be diagnosed and the standard parameters corresponding to each pathology category to obtain M predicted distances includes: respectively calculating a first distance and/or a second distance between each characteristic parameter and the standard parameters corresponding to the M pathological categories to obtain M multiplied by N characteristic distances; and respectively carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances.
In one embodiment, the fusion calculation of the N feature distances corresponding to each pathology category to obtain M predicted distances includes: acquiring a preset weight corresponding to each characteristic distance; and performing weighted calculation according to the N characteristic distances corresponding to each pathology category and the corresponding preset weight to obtain M predicted distances.
In one embodiment, the first distance is at least one of a euclidean distance, a minkowski distance, a manhattan distance, and a chebyshev distance, and the second distance is a cosine similarity and/or a pearson correlation coefficient.
In an embodiment, the obtaining the preset weight corresponding to each feature distance includes: when the characteristic distance is a first distance, the preset weight is a negative number; and when the characteristic distance is a second distance, the preset weight is a positive number.
In one embodiment, the fusion calculation of the N feature distances corresponding to each pathology category to obtain M predicted distances includes: when the feature distance is a first distance, the predicted distance is inversely related to the feature distance; when the characteristic distance is a second distance, the predicted distance is positively correlated with the characteristic distance.
In one embodiment, the determining, according to the magnitudes of the M predicted distances, a pathology category corresponding to the feature parameter to be diagnosed includes: determining the proportion of each predicted distance in the M predicted distances as the probability of the corresponding pathological category; and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the probability of each pathological type.
A computer-readable storage medium storing a computer program, the computer program when executed by a processor implementing the steps of: acquiring characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number; acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number; respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances; and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M predicted distances.
In one embodiment, the calculating, by using a preset distance calculation method, the predicted distances between the characteristic parameter to be diagnosed and the standard parameters corresponding to each pathology category to obtain M predicted distances includes: respectively calculating a first distance and/or a second distance between each characteristic parameter and the standard parameters corresponding to the M pathological categories to obtain M multiplied by N characteristic distances; and respectively carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances.
In one embodiment, the fusion calculation of the N feature distances corresponding to each pathology category to obtain M predicted distances includes: acquiring a preset weight corresponding to each characteristic distance; and performing weighted calculation according to the N characteristic distances corresponding to each pathology category and the corresponding preset weight to obtain M predicted distances.
In one embodiment, the first distance is at least one of a euclidean distance, a minkowski distance, a manhattan distance, and a chebyshev distance, and the second distance is a cosine similarity and/or a pearson correlation coefficient.
In an embodiment, the obtaining the preset weight corresponding to each feature distance includes: when the characteristic distance is a first distance, the preset weight is a negative number; and when the characteristic distance is a second distance, the preset weight is a positive number.
In one embodiment, the fusion calculation of the N feature distances corresponding to each pathology category to obtain M predicted distances includes: when the feature distance is a first distance, the predicted distance is inversely related to the feature distance; when the characteristic distance is a second distance, the predicted distance is positively correlated with the characteristic distance.
In one embodiment, the determining, according to the magnitudes of the M predicted distances, a pathology category corresponding to the feature parameter to be diagnosed includes: determining the proportion of each predicted distance in the M predicted distances as the probability of the corresponding pathological category; and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the probability of each pathological type.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A method for identifying a category of pathology based on a distance calculation method, comprising:
acquiring characteristic parameters to be diagnosed, wherein the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number;
acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number;
respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances;
and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M predicted distances.
2. The method for identifying pathological types according to claim 1, wherein the step of calculating the predicted distance between the characteristic parameter to be diagnosed and the standard parameter corresponding to each pathological type by using a preset distance calculation method to obtain M predicted distances comprises:
respectively calculating a first distance and/or a second distance between each characteristic parameter and the standard parameters corresponding to the M pathological categories to obtain M multiplied by N characteristic distances;
and respectively carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances.
3. The method according to claim 2, wherein the fusion calculation of the N characteristic distances corresponding to each pathology category to obtain M predicted distances comprises:
acquiring a preset weight corresponding to each characteristic distance;
and performing weighted calculation according to the N characteristic distances corresponding to each pathology category and the corresponding preset weight to obtain M predicted distances.
4. The method according to claim 2, wherein the first distance is at least one of a euclidean distance, a minkowski distance, a manhattan distance, and a chebyshev distance, and the second distance is a cosine similarity and/or a pearson correlation coefficient.
5. The method for identifying pathological types according to claim 4, wherein the obtaining of the preset weight corresponding to each characteristic distance comprises:
when the characteristic distance is a first distance, the preset weight is a negative number;
and when the characteristic distance is a second distance, the preset weight is a positive number.
6. The method according to claim 4, wherein the fusion calculation of the N characteristic distances corresponding to each pathology category to obtain M predicted distances comprises:
when the feature distance is a first distance, the predicted distance is inversely related to the feature distance;
when the characteristic distance is a second distance, the predicted distance is positively correlated with the characteristic distance.
7. The method for identifying pathological categories according to claim 1, wherein the determining pathological categories corresponding to the feature parameters to be diagnosed according to the magnitude of the M predicted distances includes:
determining the proportion of each predicted distance in the M predicted distances as the probability of the corresponding pathological category;
and determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the probability of each pathological type.
8. A system for identifying a category of pathology based on a distance calculation method, the system comprising:
the system comprises a first parameter acquisition module, a second parameter acquisition module and a parameter analysis module, wherein the first parameter acquisition module is used for acquiring characteristic parameters to be diagnosed, the characteristic parameters to be diagnosed comprise N characteristic parameters corresponding to N characteristics, and N is a natural number;
the second parameter acquisition module is used for acquiring preset standard parameters, wherein the preset standard parameters comprise M multiplied by N standard parameters of N characteristics respectively corresponding to M pathological categories, and M is a natural number;
the calculation module is used for respectively calculating the prediction distances between the characteristic parameters to be diagnosed and the standard parameters corresponding to each pathology category by adopting a preset distance calculation method to obtain M prediction distances;
and the diagnosis module is used for determining the pathological type corresponding to the characteristic parameter to be diagnosed according to the size of the M prediction distances.
9. The system for identifying a pathology category according to claim 8, wherein said calculation module comprises:
the distance calculation unit is used for calculating a first distance and/or a second distance between each characteristic parameter and the standard parameters corresponding to the M pathological categories respectively to obtain M multiplied by N characteristic distances;
and the distance fusion unit is used for respectively carrying out fusion calculation on the N characteristic distances corresponding to each pathology category to obtain M predicted distances.
10. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of the method for identifying a category of pathology based on a distance calculation method according to any one of claims 1 to 7.
11. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for identifying a category of pathology based on a distance calculation method according to any one of claims 1 to 7.
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