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FIGURE 1. Segmentation of myocardium as used for 2D echocardiography, 18F-FDG, and 99mTc-tetrofosmin DISA SPECT. Conventional echocardiography segments (15) are plotted in polar map with apex centrally and basal segments in outer ring. This format was used to enable optimal comparison between 2D echocardiography and SPECT. Vascular territories are indicative only and may differ between patients (segments 1, 2, 6, 7, and 10–14 represent left anterior descending coronary artery; segments 3, 8, 13, 15, and 16 represent left circumflex coronary artery; and segments 4, 5, 9, and 14 represent right coronary artery).
