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Figure 1 (A) In vivo axial magnetic resonance imaging (proton density-weighted) of a rabbit abdominal aorta. (B) The same section magnified showing a concentric atherosclerotic lesion and bright periadventitial lymphatics (white arrow). Inside the lesion one can differentiate a dark area (black arrow) and a white area (green arrow). (C) The corresponding section stained with Oil Red O showing the lipid area (black arrow) and the nonlipid (fibrous) area (green arrow). These areas correlate with those shown in the corresponding magnetic resonance section (B). (D) Magnification (see scale) of (C) showing the lipid-laden foam cells staining red.