光谱学与光谱分析 |
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Study of Cervical Exfoliated Cell’s DNA Quantitative Analysis Based on Multi-Spectral Imaging Technology |
WU Zheng, ZENG Li-bo*, WU Qiong-shui* |
School of Electronic Information, Wuhan University, Wuhan 430079, China |
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Abstract The conventional cervical cancer screening methods mainly include TBS (the bethesda system) classification method and cellular DNA quantitative analysis, however, by using multiple staining method in one cell slide, which is staining the cytoplasm with Papanicolaou reagent and the nucleus with Feulgen reagent, the study of achieving both two methods in the cervical cancer screening at the same time is still blank. Because the difficulty of this multiple staining method is that the absorbance of the non-DNA material may interfere with the absorbance of DNA, so that this paper has set up a multi-spectral imaging system, and established an absorbance unmixing model by using multiple linear regression method based on absorbance’s linear superposition character, and successfully stripped out the absorbance of DNA to run the DNA quantitative analysis, and achieved the perfect combination of those two kinds of conventional screening method. Through a series of experiment we have proved that between the absorbance of DNA which is calculated by the absorbance unmixxing model and the absorbance of DNA which is measured there is no significant difference in statistics when the test level is 1%, also the result of actual application has shown that there is no intersection between the confidence interval of the DNA index of the tetraploid cells which are screened by using this paper’s analysis method when the confidence level is 99% and the DNA index’s judging interval of cancer cells, so that the accuracy and feasibility of the quantitative DNA analysis with multiple staining method expounded by this paper have been verified, therefore this analytical method has a broad application prospect and considerable market potential in early diagnosis of cervical cancer and other cancers.
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Received: 2015-02-02
Accepted: 2015-06-15
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Corresponding Authors:
ZENG Li-bo, WU Qiong-shui
E-mail: lbzeng@whu.edu.cn; qswu@whu.edu.cn
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