A method of forming an image of a sample includes performing SOCT on a
sample. The sample may include a contrast agent, which may include an
absorbing agent and/or a scattering agent. A method of forming an image
of tissue may include selecting a contrast agent, delivering the contrast
agent to the tissue, acquiring SOCT data from the tissue, and converting
the SOCT data into an image. The contributions to the SOCT data of an
absorbing agent and a scattering agent in a sample may be quantified
separately.