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Figure 3 Representative real-time localization system (RT) images of the coronary arteries. (a) The left main coronary artery (black solid arrow), left anterior descending coronary artery and diagonal branches (white solid arrow), and ramus artery (white solid arrow head). (b) The right coronary artery (black solid arrow). (c) The left circumflex coronary artery and obtuse marginal branch (white solid arrow).