Article Figures & Data
Figures
- FIGURE 1.
Absolute activity concentration (Bq/mL) measured in each segment with 2D-G (A), 3D-10 (B), and 3D-5 (C) protocols, compared with 2D-NG acquisition. Each dot represents 1 segment, and a different color represents each of the 21 patients. Corresponding residual plots are in left upper corners. Values for slope of curve and Pearson correlation coefficient were, respectively, 1.04 and 0.98 for 2D-G, 0.97 and 0.97 for 3D-10, and 0.97 and 0.96 for 3D-5.
- FIGURE 2.
Relative activity concentration in each segment with 2D-G (A), 3D-10 (B), and 3D-5 (C) protocols, compared with 2D-NG acquisition. Segment with maximum absolute activity concentration in each patient equals 100%. Each dot represents 1 segment, and a different color represents each of the 20 patients. One patient with hibernating myocardium confirmed by 13NH3 PET was excluded.
- FIGURE 3.
Regional variation of absolute activity concentration in each of 20 segments measured with 2D-NG, 2D-G, 3D-10, and 3D-5 protocols. Polar maps are shown for each protocol, and absolute activity concentrations (Bq/mL) have been plotted for each segment. Two representative patients (A and B) are shown.
- FIGURE 4.
Mean regional activity distribution in all 20 segments measured with 2D-G (A), 3D-10 (B), and 3D-5 (C) protocols, expressed as a ratio to 2D-NG values.
- FIGURE 5.
(A) Comparison of LVEF measured with 2D-G, 3D-10, and 3D-5 protocols. (B) Corresponding Bland–Altman plot. Slope of curve, {2D,3D} intercept, and Pearson correlation coefficient were 1.02, {0.4,-0.4}, and 0.96, respectively, for 3D-10 and 0.91, {-1.3,1.2}, and 0.96, respectively, for 3D-5.
Tables
Parameter 2D acquisition 3D acquisition True coincidences (19.6 ± 4.98) × 103 s−1 (164 ± 34.9) × 103 s−1 Random coincidences (6.36 ± 2.65) × 103 s−1 (124 ± 48.8) × 103 s−1 True-to-random ratio 3.26 1.40 Single events (2.08 ± 0.57) × 106 s−1 (6.33 ± 1.07) × 106 s−1 Dead time 5% 15% - TABLE 2
Number of Segments Showing Viable Myocardium, Nontransmural Scarring, and Transmural Scarring, as Measured with 2D-NG, 2D-G, 3D-10, and 3D-5
Acquisition type Viable myocardium Nontransmural scarring Transmural scarring 2D-NG 161 145 54 2D-G 149 155 56 3D-10 165 145 50 3D-5 144 164 52
