Holographic optical coherence imaging of rat osteogenic sarcoma tumor spheroids

Ping Yu, Mirela Mustata, Leilei Peng, John J. Turek, Michael R. Melloch, Paul M. W. French, David D. Nolte
2004 Applied Optics  
Holographic optical coherence imaging is a full-frame variant of coherence-domain imaging. An optoelectronic semiconductor holographic film functions as a coherence filter placed before a conventional digital video camera that passes coherent ͑structure-bearing͒ light to the camera during holographic readout while preferentially rejecting scattered light. The data are acquired as a succession of en face images at increasing depth inside the sample in a fly-through acquisition. The samples of
more » ... . The samples of living tissue were rat osteogenic sarcoma multicellular tumor spheroids that were grown from a single osteoblast cell line in a bioreactor. Tumor spheroids are nearly spherical and have radial symmetry, presenting a simple geometry for analysis. The tumors investigated ranged in diameter from several hundred micrometers to over 1 mm. Holographic features from the tumors were observed in reflection to depths of 500 -600 m with a total tissue path length of approximately 14 mean free paths. The volumetric data from the tumor spheroids reveal heterogeneous structure, presumably caused by necrosis and microcalcifications characteristic of some human avascular tumors.
doi:10.1364/ao.43.004862 pmid:15449473 fatcat:2f5cm5xw2jhopbvr3kagp2fg34