Multispectral optoacoustic tomography (MSOT) offers the potential to image in high-resolution cells tagged with optical labels. In contrast to single wavelength imaging, multispectral excitation and spectral unmixing can differentiate labeled moieties over tissue absorption in the absence of background measurements. This feature can enable longitudinal cellular biology studies well beyond the depths reached by optical microscopy. However, the relation between spectrally resolved fluorescently labeled cells and optoacoustic detection has not been systematically investigated. Herein, we measured titrations of fluorescently labeled cells and establish the optoacoustic signal generated by these cells as a function of cell number and across different cell types. We then assess the MSOT sensitivity to resolve cells implanted in animals.
© 2014 Optical Society of AmericaFull Article | PDF Article
Melisa Gao, George Lewis, Gordon M. Turner, Antoine Soubret, and Vasilis Ntziachristos
Appl. Opt. 44(26) 5468-5474 (2005)
John Baeten, Mark Niedre, Joshua Dunham, and Vasilis Ntziachristos
Opt. Express 15(14) 8681-8694 (2007)
Claudio Vinegoni, Daniel Razansky, Jose-Luiz Figueiredo, Matthias Nahrendorf, Vasilis Ntziachristos, and Ralph Weissleder
Opt. Lett. 34(3) 319-321 (2009)