Figure 1. MR angiogram as a scout image.

Image is of the CCAs of a 71 year-old male ARIC Carotid MRI participant (Participant ID is J290624). Magnetic Resonance angiogram showing scout film: a, b: the red line indicates a reference land mark 15 mm below the carotid bifurcation where the MRI variable maximum wall thickness was measured. Further, c, d, e, f represents cross-sectional images of the carotid wall at the reference line depicted in a, b where maximum wall thickness was measured.