Abstract
The focused ultrasound plays a role in localization and modulating the
scattering light in ultrasound-modulated optical tomography (UOT). Both the
modulation efficiency of the scattering light and the spatial resolution of UOT are
determined by ultrasound. The effects of repetition frequency and pulse energy of
impulse ultrasound on the modulated scattering light are derived through experiment
in this letter. Furthermore, we compare the imaging sensitivity with 1, 2.25, 5, and
10 MHz center frequencies of impulse ultrasound. Experimental results demonstrate
that better signal-to-noise ratios and higher sensitivities can be gained by use of
more intense ultrasound and lower ultrasound frequencies.
© 2014 Chinese Optics Letters
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