
478 Handbook of Biomedical Optics
e raw data acquired by the pfdOCT system consisted of 120
spectra, each of which originates from adjacent 26 m diameter
spatial points on the experimental sample. e raw data, along
with the plots of three such spectra, are shown in Figure 23.19a.
e diameter of the signal beam was shaped to illuminate only
120 of the 255 spectral channels of the imaging spectrometer to
preserve the signal to noise ratio of the measurements.
To analyze spectra from specic tissue layers, the spectrum
detected by each channel of the imaging spectrometer was pro-
cessed using the DW processing method, described above. A ...