In vivo and in situ detection of colorectal cancer using Fourier transform infrared spectroscopy

Figure 1 Typical FTIR spectra of colon tissues measured in vitro. A: spectrum of normal colon tissue sample; B: spectrum of malignant colon tissue sample.

Figure 2 FTIR spectra of malignant cecum and colon tissues measured in vivo and in situ during surgical operation. A: spectrum of malignant cecum tissue sample; B, C and D: spectra of malignant colon tissue samples.

Figure 3 FTIR spectra of malignant rectum tissues. A: spectrum measured non-invasively, in vivo before surgical operation; B: spectrum of fresh resected rectum tissue from the same site measured in vitro.