Figure 1From: Evaluation of FTIR Spectroscopy as a diagnostic tool for lung cancer using sputum Raw example FTIR spectra for cancer and normal sputum. Raw example FTIR spectra between wavenumbers 950 cm-1 and 1800 cm-1 for (A) cancer sputum and (B) normal sputum. (C) Median raw spectra for cancer and normal sputa. (D) Second derivative spectra for cancer and normal sputa.Back to article page