Effect of Truncation of Attenuation Map (OSTG Reconstruction) and Photon Flux Intensity on Myocardial Defect Size in Attenuation-Corrected Emission Image
| System | Position of defect | Flux intensity (counts/pixel) | Defect size (mL) ± SD* | ||
|---|---|---|---|---|---|
| Normal map | Truncated map | ||||
| Profile | Septal wall | 500 | 25.7 ± 0.5 | 25.1 ± 0.4 | |
| 2,000 | 20.9 ± 0.4 | 24.6 ± 0.4 | |||
| Inferior wall | 500 | 22.3 ± 0.4 | 23.6 ± 0.4 | ||
| 2,000 | 21.2 ± 0.4 | 20.3 ± 0.4 | |||
| Uniform | Septal wall | 500 | 22.8 ± 0.4 | 18.0 ± 0.3 | |
| 2,000 | 20.9 ± 0.4 | 19.6 ± 0.3 | |||
| Inferior wall | 500 | 19.9 ± 0.3 | 18.2 ± 0.3 | ||
| 2,000 | 21.2 ± 0.4 | 18.1 ± 0.3 | |||
↵* True defect size = 21 mL.