Attenuated Total Reflection-Fourier Transform Infrared (ATR-FTIR) Spectroscopy Analysis of Saliva for Breast Cancer Diagnosis

Figure 2

Detailed average second-derivative spectra and major wavenumbers. Average spectra between (a) 3000 cm⁻¹ and 2200 cm⁻¹, (b) 2200 cm⁻¹ and 1300 cm⁻¹, and (c) 1300 cm⁻¹ and 600 cm⁻¹ for breast cancer (red line), benign breast disease (black line), and control saliva (blue line).

(a)

(b)

(c)