TABLE 1.
Physical characteristics of the three sections in the phantom
| Density (g/cm3) | Glass beads mass (g) per unit volume (L) of agar/graphite | |
|---|---|---|
| Background (reference) | 1.03 | 4.8g/1.2L |
| Sphere A | 1.07 | 1.6g/0.4L |
| Sphere B | 1.11 | 1.6g/0.4L |
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