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Myocardial opacification early (left) and late (right) after a 1 ml injection of Optison during continuous harmonic imaging. Parasternal long axis and apical four chamber views are shown. Early after the injection of Optison, right and left ventricular cavities are opacified but no myocardial opacification is seen. Late after the injection, good myocardial opacification is demonstrated (score of 3 on visual analysis).
