title: Application of linear discriminant analysis and Attenuated Total Reflectance Fourier Transform Infrared microspectroscopy for diagnosis of colon cancer.
abstract: Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) microspectroscopy was applied for detection of colon cancer according to the spectral features of colon tissues. Supervised classification models can be trained to identify the tissue type based on the spectroscopic fingerprint. A total of 78 colon tissues were used in spectroscopy studies. Major spectral differences were observed in 1,740-900 cm(-1) spectral region. Several chemometric methods such as analysis of variance (ANOVA), cluster analysis (CA) and linear discriminate analysis (LDA) were applied for classification of IR spectra. Utilizing the chemometric techniques, clear and reproducible differences were observed between the spectra of normal and cancer cases, suggesting that infrared microspectroscopy in conjunction with spectral data processing would be useful for diagnostic classification. Using LDA technique, the spectra were classified into cancer and normal tissue classes with an accuracy of 95.8%. The sensitivity and specificity was 100 and 93.1%, respectively.
authors.affiliation: Chemistry Department, Faculty of Science, Imam Khomeini International University, 34149-1-6818 Qazvin, Iran. mrkhanmohammadi@gmail.com
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Khanmohammadi
authors.forename: Amir
authors.initials: A
authors.lastname: Bagheri Garmarudi
authors.forename: Simin
authors.initials: S
authors.lastname: Samani
authors.forename: Keyvan
authors.initials: K
authors.lastname: Ghasemi
authors.forename: Ahmad
authors.initials: A
authors.lastname: Ashuri
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016000:Cluster Analysis; D003110:Colonic Neoplasms / Q000175:diagnosis*; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*