  Photoacoustic spectral analysis is a novel tool for studying various
parameters affecting signals in Photoacoustic microscopy. But only observing
frequency components of photoacoustic signals doesn't make enough data for a
desirable analysis. Thus a hybrid time-domain and frequency-domain analysis
scheme has been proposed to investigate effects of various parameters like
depth of microscopy, laser focal spot size and contrast agent concentration on
Photoacoustic signals.
