1. A method comprising the steps of: generating a plurality of multi-channel sinograms, each being generated by sampling a plurality of transducers acoustically coupled with a surface of a volume for a predetermined period of time after a pulse of light having a predominant wavelength selected from at least two different predominant wavelengths, each transducer being associated with a channel in an optoacoustic imaging system; processing at least two multi-channel sinograms, each corresponding to a different one of the at least two different predominant wavelengths to create at least two processed sinograms, the step of processing each of the two multi-channel sinograms comprises sub-band acoustic compensation; performing image reconstruction based upon the at least two processed sinograms to generate at least two optoacoustic images; performing image post processing on the at least two optoacoustic images to generate at least two post-processed images; generating a first parametric map based upon the information contained in the at least two post-processed images; generating an ultrasound image using the plurality of transducers acoustically coupled with the surface of the volume; co-registering the first parametric map and the ultrasound image; and displaying on a display an image formed from data in the co-registered first parametric map and ultrasound image.