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Comparison between saline and contrast OCT. The upper panel shows pre-PCI run of RCA using contrast as a flushing media and in the lower panel the same vessel is imaged using saline as a flushing media for OCT and compared for image quality. All the lesion morphologies (including plaque rupture, dissections, recanalized thrombus, and macrophages) seen in contrast OCT are clearly seen with saline OCT (marked by yellow arrows at the same level).
