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Figure 4 Examination of the aortic arch by suprasternal harmonic imaging. (Top) Overview images of the proximal thoracic aorta (long axis). (Bottom) Zoomed image sections after adjusting gain facilitate detail recognition. (Left) Calcifications without protruding atheromas at the minor curvature of the aorta (three arrowheads pointing down) and at the origin of the inominate artery (two arrowheads pointing up). (Right) Large noncalcified atheroma (arrowheads) protruding into the proximal descending thoracic aorta vis-à-vis the origin of the left subclavian artery. Note that the hypoechoic ("soft") atheroma is clearly delineated only after zoom and gain adjustments.