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Figure 3 Birefringence in an NCFA

(A) Optical coherence tomography image of a necrotic core fibroatheroma (NCFA). (B) Corresponding PSOCT image showing birefringence within the fibrous cap overlying a region of the lipid pool. Cholesterol crystals shown by arrows appear birefringent below the fibrous cap. (C) Corresponding PSR-stained image of the NCFA showing collagen birefringence within the fibrous cap. (D) Trichrome-stained histology. Scale bars = 500 µm. Abbreviations as in Figure 1.