This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Polarization Sensitive Optical Coherence Tomography (PS-OCT) is being evaluated as a potential diagnostic tool for the evaluation of degenerative joint disease, by examining alterations in tissue birefringence in articular cartilage specimens. Tissue birefringence is influenced by both the material composition of the tissue and its orgainization and orientation in relation to the optical axis. Non-linear optical microscopy is being used to describe the organization and orientation of collagen fibers in articular cartilage specimens imaged by PS-OCT in order to better interpret the phase retardation images obtained from articular cartilage specimens.
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