Future Potential Clinical Applications of Spectroscopic Techniques in Human Diseases - Vibrational Spectroscopy for Tissue Analysis - page 313

Reectance-KKT

G3
G2

G1
G3
G2

Reectance

G1

ATR

G3
G2
G1

1000 1500 2000 2500

Wavenumber/cm -1

3000 3500 4000

Figure 5.19
Spectra of three grades of IDC samples.

930 cm -1 976 cm -1 1057 cm -1

1142 cm -1 1215 cm -1 1377 cm -1

1443 cm -1 1504 cm -1 1643 cm -1

Figure 5.21
False-colour images based on the second-derivative intensity at the indicated wave numbers.
Blue indicates high intensity (large negative second derivative) while red indicates low intensity.

x 10 -4

4

2

0

-2

-4

-6

-8

1000 1200 1400 1600 1800

Wavenumber/cm -1

Figure 5.23
The blue spectrum is from the left side and the green spectrum is from the right. The difference
in the relative intensities at 1057 and 1215 cm −1 is obvious.