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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: Int Forum Allergy Rhinol. 2015 Jul 2;5(11):1048–1054. doi: 10.1002/alr.21582

Figure 3. Phase-contrast microscopy FFT results.

Figure 3

(A) The corresponding frequency power spectrum from the selected points shown in Figure 2 showing a peak magnitude frequency of approximately 9 Hz. (B) The change in intensity in time domain plotted to assist the user in determining the characteristic frequency at the points of interest. The pixel intensity fluctuates with ciliary motion.