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Method for measuring human cartilage endochrome and application of human cartilage endochrome in forensic medicine

A method of measuring cartilage, which is applied in the field of forensic anthropology, can solve the problems of inability to obtain the objective relationship of cartilage pigmentation, inaccurate quantification, and cumbersome operations

Pending Publication Date: 2019-08-27
SHANGHAI CRIMINAL SCI TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method is cumbersome to operate, and the quantification is not accurate
In previous studies, a camera was used to capture cartilage sections and software was used to obtain the RGB channel values ​​of the image to quantify cartilage pigmentation. Although this method is convenient for quantifying human cartilage pigmentation, it is easily affected by many factors, especially the shooting environment. The influence of the light source on the RGB channel value of the image reduces the quantitative accuracy, and the objective relationship between cartilage pigmentation and age cannot be obtained

Method used

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  • Method for measuring human cartilage endochrome and application of human cartilage endochrome in forensic medicine
  • Method for measuring human cartilage endochrome and application of human cartilage endochrome in forensic medicine
  • Method for measuring human cartilage endochrome and application of human cartilage endochrome in forensic medicine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Measuring method of pigment in costal cartilage

[0049] (1) Cost cartilage sample processing and image acquisition

[0050] In this embodiment, the anterior ribs of the second costal cartilage isolated from 89 Han people (including 58 men and 31 women) were used to obtain tissue sections of the second costal cartilage. Remove the extraneous attached tissue of the isolated cartilage to avoid damaging the cartilage tissue itself, wash it with water and dry it. Use a scalpel or other slicing tool to obtain a slice of cartilage tissue with a thickness of about 2 mm through a cross-sectional incision. Use Canon (Canon) 9000F Mark Ⅱ scanner "photo scan mode" to scan the two sides of costal cartilage slices to obtain a color image with an image format of TIFF and an image resolution of DPI=600.

[0051] (2) Obtaining the average gray value of the costal cartilage section image

[0052] The image analysis software Adobe Photoshop CS5 was used to read the image of the costa...

Embodiment 2

[0053] Example 2. Analysis of correlation between costal cartilage pigment and age

[0054] (1) The establishment of a mathematical model for age estimation based on quantification of pigment in costal cartilage

[0055] The age and gender of the 89 samples were used as independent variables, and the average gray value of the corresponding costal cartilage section was used as the dependent variable. The variables were analyzed by multiple linear regression model using SPSS software. In the Pearson correlation analysis, the age variable was significantly correlated with the average gray value of the costal cartilage section (p 0.05), indicating that there is no significant difference in the amount of pigment in the costal cartilage between men and women.

[0056] The SPSS software was used to analyze the age and the average gray value of costal cartilage section with a univariate linear regression model. Among them, age is used as the dependent variable, and the average gray value o...

Embodiment 3

[0059] Example 3 Application of quantification of intrachondral pigment in forensic medicine (verification of the accuracy of the age estimation model based on quantification of human costal cartilage pigment)

[0060] Collect the second cost cartilage in vitro from 24 Chinese Han individuals, and obtain the second cost cartilage slices from the body at a distance of 2 cm from the sternum according to the measurement method in Example 1 above, and obtain the scan pictures of each cost cartilage slice. And the average gray value. The average gray value of each costal cartilage section is substituted into the age estimation model obtained in Example 2, and the estimated age is calculated. The estimated age is compared with the actual age, and the average absolute age deviation (MAD) is calculated. The specific results are shown in the following table:

[0061]

[0062]

[0063] The results showed that the accuracy of the age estimation model based on quantification of the pigment in...

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Abstract

The invention belongs to the technical field of forensic humans, and particularly relates to a method for determining human cartilage endochrome and application of the human cartilage endochrome in forensic medicine. An in-vitro cartilage section image is obtained by using a scanner, and image processing software is used for obtaining a pigmentation quantification method of an average gray value of an image. A linear model based on human cartilage endochrome quantification and age correlation is established. The method disclosed by the invention is simple and convenient to operate, low in costand high in accuracy, has very high forensic value, and can be popularized in forensic practice.

Description

Technical field [0001] The invention belongs to the technical field of forensic anthropology, and specifically relates to a method for determining human cartilage pigment and its application in forensic medicine. Background technique [0002] In the field of forensic anthropology, the age estimation of individuals is often used to provide important clues in the investigation of various cases. In this field, accurate age estimation, as a biological indicator, can determine the true age of the person involved, especially the deceased, so as to provide reliable scientific evidence for the handling of the case; among them, a reliable age estimation method should be adopted Appropriate age estimation parameters have regular changes with the increase of human biological age and have universal laws in the population. [0003] At present, in forensic medicine, most traditional methods are used to estimate the age of the deceased. Traditional methods generally take the morphological or st...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06F17/18
CPCG06T7/0012G06F17/18G06T2207/30008
Inventor 阎建军谢建辉赵子琴马开军沈忆文肖碧孟航杨沁蕊许路易
Owner SHANGHAI CRIMINAL SCI TECH RES INST
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