Biomedical Engineering Reference
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0.6
A
0.5
0.4
0.3
0.2
0.1
0.0
1800
1600
Wavenumber, cm -1 1200
1400
1000
800
0.7
B
164 1630
0.6
1542
0.5
1522
0.4
0.3
0.2
0.1
0.0
1700
1600
1500
1400
Wavenumber, cm -1
Figure 5.15
A: FTIR spectra of sections from DCIS, (LNG in black, ING in blue, and HNG in red). B: Variation
in intensity of the peaks in the spectral region 1700-1400 cm −1 .
PCA map
120
108
96
84
72
60
48
36
24
12
12
24
36
48
60
72
84
96
108 120
Figure 5.17
Red region of the image illustrates the area that gives rise to greatest shift and the blue region
shows the minimum shift in the IR spectrum.
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