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Fig. 3 | BMC Cancer

Fig. 3

From: Early detection of breast cancer using total biochemical analysis of peripheral blood components: a preliminary study

Fig. 3

FTIR-MSP spectra of plasma of cancer patients, ‘benign’ patients and healthy controls. (a) Average of the absorption spectra of plasma of each study group between 1800 cm−1 and 700 cm−1. The spectra are vector normalized. Each spectrum of a single subject is an average of five measurements at different locations of the plasma dried film. The absorbance bands of the major functional bonds of the bio-molecules are marked. (b) and (c), Expanded second derivative spectra of plasma from each subjects’ group are presented. The mean ± standard error of the mean (SEM) for each data set (healthy, benign, and cancer) is represented by the thickness of the curves

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